JP2010120076A - Pipe alignment apparatus, pipe welding method and method of manufacturing piping member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe groove aligning apparatus which is capable of rapidly and easily performing the work of centering the groove of a pipe and adjusting groove space and which is applicable to a variety of pipe diameters. <P>SOLUTION: The pipe alignment apparatus 1 includes a pair of fastening belt members 21 and 22, which are arranged so as to surround the outer circumference of a pair of pipes 11 and 12, a plurality of fixing sections 25 and 26, and a gap control section 27. The fastening belt members 21 and 22 are designed to fasten the pipes 11 and 12 of which the fastening condition is adjustable. The fixing sections 25 and 26 are mounted on the outer surface of the plurality of the pipes 11 and 12. The gap control section 27 links the fixing sections 25 and 25 to each other in a first direction which is along the axial direction of the pipes 11 and 12 and can adjust the gap between the fixing sections 25 and 26 in the first direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pipe alignment apparatus, a pipe welding method, and a pipe member manufacturing method.

  In piping work, when a plurality of pipes having the same diameter are joined by welding, groove alignment is performed to align the groove portions of the pipes before welding. In this groove alignment, center alignment and interval alignment (gap alignment) are performed with the ends of the pipes facing each other.

  In general, in pipe groove alignment, first, two pipes are held by a chain block or a wire, the groove portions are brought close to each other and held so that the axes of the pipes substantially coincide with each other. Centering and spacing are performed by work. In such a groove alignment method, the work accuracy and work time depend on the skill of the worker.

  In addition, it is necessary to adjust the groove in pipes where seams are welded after bending, such as pipes that are deformed and do not have a perfect circle, or in places where there are many narrow areas that are difficult for workers to access. Is difficult to maintain, and the working time and cost increase.

  In order to cope with the above circumstances, there is provided a technique for fixing a fixing member that sandwiches a pipe with two semicircular jigs to each pipe and adjusting an interval between the fixing members (see, for example, Patent Document 1). .

Moreover, the technique of aligning pipes by winding and compressing a compression chain around the pipe is provided (see, for example, Patent Document 2).
JP-A-5-192793 JP-A-11-226784

  However, the above-described technique has the following problems. That is, in the configuration in which the pipe is sandwiched between two semicircular jigs, there is a problem that the weight of the apparatus becomes heavy and the setting work becomes heavy labor when performing the groove alignment work of the large-diameter pipe. Moreover, when the lineup of pipe diameters is various, there is a problem that an apparatus is required for each lineup.

  On the other hand, the compression chain can handle only the centering operation of the groove portion, and there is a problem that the groove interval adjusting operation cannot be performed.

  The present invention has been made in response to the above-described circumstances, and enables the centering of the groove portion of the pipe and the operation of aligning the groove interval to be performed quickly and easily and can be applied to various pipe diameters. An object of the present invention is to provide a simple pipe groove aligning device.

  A pipe alignment apparatus according to an example of the present invention is disposed so as to surround an outer periphery of a pair of pipes, and is attached to an outer surface of the pair of pipes, and a pair of tightening portions configured to be capable of adjusting a tightening state thereof. A plurality of fixed portions, and a distance adjusting portion configured to connect the fixed portions to each other in a first direction along an axial direction of the pipe and adjust a distance in the first direction between the fixed portions. It is characterized by having.

  The pipe alignment method according to another example of the present invention includes a step of arranging a pair of tightening portions configured to be capable of adjusting a tightening state on the outer periphery of a pair of pipes, and a plurality of fixing portions as the pair. A step of attaching each of the pipes to the outer surface, a step of fastening the pipes by a fastening member provided on the outer periphery of the pair of pipes, aligning the axial positions of the pair of pipes, and an axial direction of the pipes And a step of adjusting a distance between the pair of pipes by adjusting a distance in the axial direction between the fixed parts by a distance adjusting part that adjusts a distance in the first direction while being connected in a first direction along the line. It is characterized by that.

  According to another embodiment of the present invention, there is provided a method for manufacturing a piping member, the step of arranging a pair of tightening portions configured to adjust a tightening state on the outer periphery of a pair of piping, and a plurality of fixing portions. A step of attaching each of the pipes to the outer surface, a step of fastening the pipes by a fastening member provided on the outer periphery of the pair of pipes, aligning the axial positions of the pair of pipes, and an axial direction of the pipes A distance adjusting unit that adjusts the distance in the first direction while adjusting the distance in the axial direction between the fixed parts and adjusting the distance between the pair of pipes; And a step of welding the groove portion of the pipe.

  According to the present invention, it is possible to quickly and easily perform the centering and interval adjusting operations of the groove portion of the pipe and to be applicable to various pipe diameters.

[First Embodiment]
An alignment apparatus 1 according to an embodiment of the present invention will be described below with reference to FIGS. In each drawing, the configuration is appropriately enlarged, reduced, or omitted. Arrows X, Y, and Z in the drawings indicate three directions orthogonal to each other. In the figure, the arrow X is along the first direction, and Y is along the second direction.

  The alignment apparatus 1 aligns (grooves) the groove portions 11a and 12a formed at the ends of a pair of pipes 11 and 12 having the same diameter and configured in a cylindrical shape by carbon steel, for example. For example, it is used when the pipes 11 and 12 are butt welded. As shown in FIG. 1, the first direction is along the axial direction of the pipes 11 and 12 in a state where the alignment device 1 is mounted on the pipes 11 and 12.

  The alignment apparatus 1 includes a plurality of belt members 21 and 22 (tightening portions) wound around the outer circumferences of the plurality of pipes 11 and 12, and a tightening adjustment that adjusts the tightening state of the pipes 11 and 12 by the belt members 21 and 22. Parts 23, 24, fixing parts 25, 26 fixed to the outer peripheral surfaces of the plurality of pipes 11, 12, respectively, and a distance adjusting part 27 for adjusting the distance between the fixing parts 25, 26 in the first direction. I have.

  The belt members 21 and 22 are configured in a band shape by connecting a plurality of coupling tools 41 extending in the first direction, and are easily deformed in a plane intersecting the first direction and are not easily bent in the first direction. It has become. The belt members 21 and 22 are made of a material such as titanium that is lightweight and excellent in strength, for example.

  The tightening adjusting units 23 and 24 include a winding unit 42 that winds up the belt members 21 and 22 and an operation lever 43 for adjusting the winding amount. The tightening state can be adjusted by changing the winding amount in accordance with the operation of the operation lever 43 and changing the lengths of the belt members 21 and 22 wound around the pipe.

  For example, if the amount of winding is increased and the length of the belt members 21 and 22 arranged on the outer periphery is shortened, tightening is tightened, and if the amount of winding is reduced and the length of the belt members 21 and 22 arranged on the outer periphery is increased, tightening is performed. Becomes loose.

  The winding part 42 is fixed to the fixing parts 25 and 26. The position of the belt members 21 and 22 in the first direction is fixed by the winding portion 42.

  As shown in FIG. 2, fixing portions 25 and 26 are also provided on the other side in the radial direction (left side in the figure). In order to fix the positions of the belt members 21 and 22 in the longitudinal direction to the fixing portions 25 and 26. The attachment tool 44 is provided.

  The belt members 21 and 22 are disposed in an outer peripheral portion that passes through the winding portion 42 and the fixture 44 and passes through a plane orthogonal to the axial direction of the pipes 11 and 12.

  The fixing portions 25 and 26 are provided at two locations facing each other with the pipes 11 and 12 therebetween. That is, as shown in FIGS. 1 and 2, the two pipes 11 and 12 are respectively provided at two locations on both ends in the radial direction indicated by Y in the drawing. The fixing portions 25 are provided at two locations on the outer periphery of the pipe 11, and the fixing portions 26 are provided at two locations on the outer periphery of the piping 12. The two fixing portions 25 and 26 at both ends in the radial direction are arranged so that the positions in the first direction are aligned, and the belt members 21 and 22 are wound so as to pass through the two fixing portions 25 and 26.

  The fixing portions 25 and 26 include an L-shaped bracket 31 as a fixture, a magnet portion 32 for temporarily fixing the L-shaped bracket 31 to the pipes 11 and 12 by magnetic force, and the L-shaped bracket 31 to the pipes 11 and 12. And a plurality of adjustment screws 33 for adjusting the fixed state.

  The L-shaped metal fitting 31 has an L-shaped cross section formed by bending a plate-like member made of a lightweight material such as aluminum, and has two ends extending in the X direction (first direction) along the axial direction of the pipe. Has an edge.

  Magnet portions 32 are provided at the two edge portions. The fixing portions 25 and 26 can be easily attached to the pipes 11 and 12 made of metal by the magnetic force of the magnet portion 32.

  A screw receiving portion 34 is formed at the end of the L-shaped metal fitting 31 on the side of the groove portions 11a and 12a. The screw receiving portion 34 has a nut shape. Screw portions of connecting members 37 described later are inserted into the screw receiving portions 34, respectively.

  The adjustment screws 33 are provided at the four corners of the L-shaped metal fitting 31, respectively. The adjustment screw 33 is provided penetrating in the thickness direction of the L-shaped metal fitting 31, and is fixed to the pipes 11 and 12 by adjusting the length of the tip end side protruding to the pipe side by adjusting the penetration state. Is adjustable. For this reason, for example, when the pipes 11 and 12 have a shape that is not a perfect circle or when there is a dimensional error, the displacement due to deformation can be absorbed and firmly attached.

  The distance adjusting unit 27 is provided at two locations (two directions) in the radial direction of the pipes 11 and 12. Although only the distance adjustment unit 27 on one side of the front is shown in FIG. 1, a similar distance adjustment unit 27 is also provided on the back side.

  The two distance adjusting sections 27 include a connecting member 37 and an adjusting nut 38 that connect the L-shaped metal fittings 31 disposed in the one pipe 11 and the other pipe 12, respectively. The connecting member 37 extends in the first direction, and first and second screw portions 35 and 36 are formed on one half and the other half in the first direction, respectively. The first screw portion 35 and the second screw portion 36 are formed with screw grooves in a spiral shape in opposite directions.

  An adjustment nut 38 is attached to the central portion of the connecting member 37 in the longitudinal direction. Inside the adjustment nut 38, a screw groove that fits the first screw portion 35 is formed on one side in the axial direction, and a screw groove that fits the second screw portion 36 is formed on the other side.

  A connecting member 37 is inserted into the adjustment nut 38. That is, the adjustment nut 38 is joined over the first and second screw portions 35, 36, and the connection member 37 is rotated when the adjustment nut 38 is rotated.

  The end portions of the screw portions 35 and 36 of the connecting member 37 are respectively inserted into the screw receiving portions 34. Therefore, when the connecting member 37 rotates, the insertion length of the connecting member 37 positioned between the screw receiving portions 34 into the screw receiving portion 34 changes. That is, by rotating the adjusting nut 38, the connecting member 37 is rotated, and the distance between the L-shaped metal fittings 31, that is, the distance between the pipes 11 and 12 can be adjusted.

  For example, when the adjustment nut 38 is rotated once in a clockwise direction, the adjustment nut 38 is extended by 1 mm, and when it is rotated counterclockwise, the adjustment nut 38 is reduced by 1 mm.

  Hereinafter, the manufacturing method of the piping member including the piping alignment method and the welding method according to the present embodiment will be described with reference to FIG.

  First, as shown in FIG. 4, preliminary alignment of the pipes 11 and 12 is performed (preliminary alignment step). In this preliminary positioning step, for example, positioning within a range that can be easily set by anyone without depending on the operator's technique is performed. For example, alignment is performed so that the difference in position between the core C1 of the pipe 11 and the core C2 of the pipe 12 is within about 100 mm, and the distance between the groove portions 11a and 12a in the X direction is within about 100 mm.

  Note that this preliminary positioning step may be performed using a support mechanism such as a crane instead of manually according to the size and weight of the piping.

  Next, the alignment device 1 is attached to the pipe (attachment process). In this mounting step, first, fixing portions 25 and 26 are respectively attached to two locations along the outer peripheral surface of the pipe. At this time, it can be easily attached because it is attracted to the pipes 11 and 12 made of carbon steel by the magnetic force of the magnet portion 32 of the L-shaped metal fitting 31.

  Next, with the belt members 21 and 22 loosened, the pipes 11 and 12 are arranged in an annular space surrounded by the belt members 21 and 22, and the belt members 21 and 22 are attached so as to surround the outer periphery of the pipes 11 and 12. At the same time, the belt members 21 and 22 are attached to the fixing portions 25 and 26.

  For example, when the belt members 21 and 22 and the fixing portions 25 and 26 are integrated in advance, an operation of arranging the belt members 21 and 22 on the outer periphery of the pipe and an operation of attaching the L-shaped bracket 31 to the pipe At the same time.

  Next, the length of the adjustment screw 33 of the fixing portions 25 and 26 is adjusted as necessary to bring the L-shaped bracket 31 into contact with the outer peripheral surface of the pipe (contact adjustment step). For example, in a pipe welded with a seam after bending, when the L-shaped bracket 31 does not contact the outer peripheral surface of the pipes 11 and 12, such as when the pipe is deformed and does not have a perfect circle as compared to a seamless pipe without a seam. In addition, this contact adjustment step is performed.

  Next, by operating the operation lever 43, the belt members 21 and 22 are wound up, the pipes 11 and 12 are tightened by the belt members 21 and 22, and centering is performed (centering step). Since the fixing portions 25 and 26 attached to the two pipes are connected by the connecting member 37, they are integrally configured in a state of being parallel in the axial direction. In this state, the belt members 21 and 22 are tightened so that the axes of the two pipes 11 and 12 are aligned. As described above, the pipes 11 and 12 are firmly sandwiched and held between the two fixed portions 25 and 26 arranged to face each other.

  After the centering step, the groove interval is adjusted by operating the distance adjusting unit 27 (distance adjusting step). That is, the adjustment nut 38 is rotated to adjust the length of the connecting member 37 to adjust the groove interval.

  At this time, as described above, the two L-shaped metal fittings 31 arranged in the longitudinal direction are integrated by the connecting member 37, so that the distance between the L-shaped metal fittings 31 changes along the axial direction of the pipes 11 and 12, The total length of the distance adjusting unit 27 is reduced. When the adjustment nut 38 is rotated once in a clockwise direction, it is extended by 1 mm, and when it is turned counterclockwise, it is reduced by 1 mm. Since the fixing portions 25 and 26 are connected in the axial direction, the interval can be reduced while maintaining the core position without shifting the position of the shaft.

  In addition, by rotating the adjustment nuts 38 of the two distance adjusting portions 27 provided so as to face the two radial directions of the pipes 11 and 12 with the pipes 11 and 12 therebetween, simultaneously or alternately by one rotation. The core positions of the pipes 11 and 12 can be prevented from being displaced and the alignment device 1 from being damaged.

  After completion of the distance adjustment step, temporary attachment is performed in the temporary attachment welding step. Next, the alignment device 1 is removed from the pipe (removal process). Finally, by temporarily welding the temporarily attached pipes, the welding of the pipes is completed, and the production of the piping members is completed.

  According to the present embodiment, the following effects can be obtained. That is, by using the alignment device, the centering operation and the interval alignment operation of the pipe groove portions 11a and 12a can be performed without depending on the skill of the operator, and the operation time can be shortened. .

  In addition, since the tightening state of the pipes 11 and 12 can be adjusted by winding the belt members 21 and 22, one apparatus can cope with pipes of various diameters. Therefore, the capital investment cost can be reduced.

  Furthermore, since the L-shaped metal fitting 31 is used for the fixing portions 25 and 26 and fixed at two end portions having a predetermined interval, it can be applied to various types of piping regardless of the diameter of the piping to be attached. Become.

  In addition, it is possible to perform groove alignment for pipes that have been bent and welded at seams, such as pipes that are not deformed and do not have a perfect circle, or for areas that are narrow and difficult for workers to access. Can be easily performed while maintaining the above.

[Second Embodiment]
Next, the alignment apparatus 2, the alignment method, and the manufacturing method of a piping member which concern on 2nd Embodiment of this invention are demonstrated with reference to FIG. In each drawing, the configuration is appropriately enlarged, reduced, or omitted. In the figure, arrows X, Y, and Z indicate three directions orthogonal to each other.

  Since the alignment apparatus 1 according to the present embodiment is the same as that of the first embodiment except for the configuration of the distance adjusting unit 50, the description of common matters is omitted.

  In the alignment apparatus 2 according to the present embodiment, the distance adjustment unit 50 includes a rack and pinion type drive shaft 51 that connects the fixing units 25 and 26 in the first direction, a drive lever 52, a clutch mechanism unit 53, and a clutch. And a lever 54.

  In addition, the distance adjustment part 50 is each provided in the one side and the other side in the radial direction of piping similarly to 1st Embodiment.

  The drive shaft 51 includes a rack 51a and a pinion 51b that mesh with each other. The drive shaft 51 is connected to two fixed portions 25 and 26 that are separated in the axial direction.

  The drive lever 52 is detachably attached to the drive shaft 51, and the engagement state between the rack 51 a and the pinion 51 b is changed by rotating the drive lever 52 with the drive shaft 51 attached, so that the length of the drive shaft 51 is increased. The total length of the distance adjusting unit 50 can be adjusted.

  The total length of the distance adjusting unit 50 in the first direction (X direction) is configured to extend by 1 mm when the drive lever 52 is rotated once in a clockwise direction, and contract by 1 mm when the drive lever 52 is rotated counterclockwise.

  The clutch lever 54 is configured to be able to switch the ON / OFF state of the clutch mechanism 53. By this switching, it is possible to adjust whether or not one distance adjusting unit 50 is operated in conjunction with the other distance adjusting unit 50. The clutch lever 54 can be removed.

The clutch mechanism unit 53 is configured to interlock the operations of the two distance adjusting units 50 in the ON state and release the interlocking in the OFF state. That is, when the clutch mechanism 53 is turned on, the total length of the other distance adjusting unit 50 changes in conjunction with the change in the total length of the one distance adjusting unit 50. For this reason, it is possible to adjust the groove interval by adjusting only one of the two distance adjusting portions 50 provided to face each other in the radial direction. Using the alignment device 1 configured as described above, When alignment is performed, first, the alignment process is performed as in the first embodiment.

  Thereafter, in the distance adjustment step, the length of the distance adjustment unit 50 is adjusted by operating the clutch lever 54 to turn on the clutch mechanism 53 and shortening the drive shaft 51 by rotating the drive lever 52. To adjust the groove interval.

  At this time, since the clutch mechanism 53 is in the ON state, if only the distance adjusting unit 50 on one side is adjusted, the distance adjusting unit 50 on the other side is also adjusted in conjunction.

  Thereafter, similarly to the first embodiment, by performing the temporary welding process, the apparatus detaching process, and the main welding process, the welding of the piping is completed, and the manufacturing of the piping member is completed.

  Also in the alignment apparatus 1, the alignment method, and the piping member manufacturing method according to the present embodiment, the same effects as those of the first embodiment can be obtained.

  Further, since the distance adjustment unit on the other side is adjusted in conjunction with the adjustment state of the distance adjustment unit 50 on one side, only the distance adjustment unit 50 on one side is adjusted after the pipe groove portions 11a and 12a are aligned. Therefore, the groove interval can be adjusted. As a result, the working time can be further shortened and the working efficiency can be improved, and various working environments such as construction sites having many narrow portions and difficult for the operator to access can be accommodated.

[Third Embodiment]
Next, an alignment apparatus 3, an alignment method, and a piping member manufacturing method according to a third embodiment of the present invention will be described with reference to FIG. In each drawing, the configuration is appropriately enlarged, reduced, or omitted. In the figure, arrows X, Y, and Z indicate three directions orthogonal to each other. The alignment device 3, the alignment method, and the piping member manufacturing method according to the present embodiment are the same as those of the first embodiment except that a hydraulic mechanism is used instead of the screw mechanism as the distance adjusting unit 27. Therefore, description of common items is omitted.

  In the alignment apparatus 3 according to the present embodiment, the distance adjusting unit 27 is configured by a hydraulic unit 60.

  The hydraulic unit 60 includes a hydraulic cylinder 61 that extends in the first direction and has both ends connected to the fixing portions 25 and 26, a supply pump 62 that supplies liquid to the hydraulic cylinder 61, and a hydraulic pressure adjustment that adjusts the supply state of hydraulic pressure. The control part 63 as a part and the laser sensor 64 (detection means) are provided and comprised.

  The distance adjusters 27 provided at two locations on both sides in the radial direction of the pipes 11 and 12 are connected to one supply pump 62. In other words, the hydraulic cylinders 61 are provided in the respective distance adjusting units 27 on both sides in the Y direction, and one supply pump 62 is connected to the two hydraulic cylinders 61.

  The laser sensor 64 has a function of detecting the interval between the pipes. The control unit 63 can automatically perform the groove interval adjusting operation by controlling the operation of the supply pump 62 so that the interval is set in advance according to the detection result of the laser sensor 64.

  When the pipe alignment is performed using the alignment apparatus 3 configured as described above, first, the alignment process is performed as in the first embodiment. Thereafter, by controlling the supply state from the supply pump 62 of the hydraulic unit 60 to the hydraulic cylinder 61, the length of the hydraulic cylinder 61 is adjusted to bring the groove portions 11a and 12a closer. In this distance adjustment, the interval may be automatically controlled until the interval set in advance by the control unit 63 or the operation of the supply pump 62 may be adjusted manually.

  At this time, two hydraulic cylinders 61 provided in two directions along the outer peripheral surface are adjusted by the operation of one supply pump 62.

  According to the present embodiment, by using the hydraulic unit 60, it is possible to perform an operation of aligning the groove interval of a large-diameter / thick-walled pipe, which is difficult manually, and an effect of shortening the work time can be obtained.

  Further, in order to operate the hydraulic unit 60 with one supply pump 62, the intervals between the fixing portions 25 and 26 attached in two directions along the outer peripheral surfaces of the two pipes 11 and 12 to be welded are simultaneously operated. It is possible.

  In addition, the interval adjustment operation can be automated by the configuration including the laser sensor 64 as the detection unit and the control unit 63 that controls the interval according to the detection result.

  In addition, this invention is not limited to the said embodiment as it is. For example, although the case where the fixing portions 25 and 26 and the belt members 21 and 22 are integrated has been described, they may be configured separately.

  Furthermore, the configuration of the fixture is not limited to the L shape. For example, the same effect can be obtained even if the curved cross section is C-shaped and the two edges extend in the first direction.

  In addition, in the implementation stage, the constituent elements can be modified and embodied without departing from the spirit of the invention. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The side view which shows the structure of the position alignment apparatus concerning 1st Embodiment of this invention. Sectional drawing which shows the AA cross section in FIG. 1 of the alignment apparatus. Explanatory drawing which shows the manufacturing process of piping concerning the embodiment. Explanatory drawing which shows the preliminary alignment process based on the embodiment. Explanatory drawing which shows the mounting process which concerns on the same embodiment. Explanatory drawing which shows the center alignment process which concerns on the same embodiment. The side view which shows the structure of the position alignment apparatus concerning 2nd Embodiment of this invention. The side view which shows the structure of the position alignment apparatus concerning 3rd Embodiment of this invention.

Explanation of symbols

1.2.3 ... Positioning device, 11.12 ... Piping, 11a. 12a ... groove portion,
21.22 ... belt member, 23.24 ... adjustment part, 25.26 ... fixing part,
27: Distance adjusting part, 31 ... L-shaped metal fitting, 32 ... Magnet part, 34 ... Screw receiving part,
37: connecting member, 38: adjusting nut, 41: connecting tool, 42: winding part, 43 ... operating lever, 44 ... mounting tool, 50 ... distance adjusting part, 51 ... drive shaft, 51a ... rack, 51b ... pinion,
52 ... Drive lever, 53 ... Clutch mechanism, 54 ... Clutch lever,
60 ... Hydraulic unit, 61 ... Hydraulic cylinder, 62 ... Supply pump, 63 ... Control part,
64: Laser sensor.

Claims (13)

A pair of tightening portions arranged so as to surround the outer periphery of the pair of pipes and configured to be capable of adjusting the tightening state;
A plurality of fixing portions attached to the outer surfaces of the pair of pipes;
A distance adjuster configured to connect the fixed parts to each other in a first direction along the axial direction of the pipe and adjust the distance between the fixed parts in the first direction;
A pipe alignment apparatus characterized by comprising:   The alignment apparatus according to claim 1, wherein the distance adjusting unit is provided on one side and the other side of the pipe in a second direction intersecting the first direction.   The alignment apparatus according to claim 1, wherein the fixing portion includes a fixing tool having a plurality of edges extending in the first direction.   The alignment apparatus according to claim 3, wherein a magnet portion fixed to the pipe by a magnetic force is provided at the end edge of the fixture.   The alignment device according to claim 3, wherein an adjustment screw is provided on the end edge of the fixture so as to protrude toward the pipe side and adjust the protruding state.   The alignment device according to claim 1, wherein the tightening portion is formed integrally with the fixing portion. The distance adjuster is
A first threaded portion and a second threaded portion that extend in the first direction between the fixed portions and are formed with thread grooves facing in opposite directions on one side and the other side of the first direction, respectively. A connecting member having,
A plurality of screw receiving portions which are respectively fixed to the plurality of fixing portions, and end portions of the first and second screw portions are respectively combined;
The alignment apparatus according to claim 1, further comprising: an adjustment nut that fits over the first and second screw portions at a central portion of the connecting member. The distance adjuster is disposed on the outer peripheral surface on one side in the radial direction of the pipe,
On the other side in the radial direction, a fixed part fixed to the outer peripheral surface of the pipe, and an interlocking part configured to connect between the fixed parts and extend and contract in conjunction with the operation of the distance adjusting part The alignment apparatus according to claim 1, further comprising: The distance adjuster is
A connecting cylinder portion configured to connect the pipes and extend and contract according to hydraulic pressure;
The alignment apparatus according to claim 1, further comprising a hydraulic pressure adjusting unit that adjusts the hydraulic pressure of the connecting cylinder unit. The distance adjuster is
It further comprises detection means for detecting the interval between the pipes,
The alignment apparatus according to claim 9, wherein the hydraulic pressure adjustment unit operates according to a detection result of the detection unit.   2. The position according to claim 1, wherein the tightening portion includes a belt member configured in a chain shape in which a plurality of coupling members extending in the first direction are coupled in a direction intersecting the first direction. Alignment device. A step of arranging a pair of tightening portions configured to be capable of adjusting the tightening state on the outer periphery of the pair of pipes;
Attaching a plurality of fixing portions to the outer surfaces of the pair of pipes,
Tightening the pipe with a tightening member provided on the outer periphery of the pair of pipes, and aligning the axial positions of the pair of pipes;
The fixed portions are connected in a first direction along the axial direction of the pipe and a distance adjusting portion that adjusts the distance in the first direction is used to adjust the axial distance between the fixed portions. Adjusting the interval;
A pipe alignment method characterized by comprising: A step of arranging a pair of tightening portions configured to be capable of adjusting the tightening state on the outer periphery of the pair of pipes;
Attaching a plurality of fixing portions to the outer surfaces of the pair of pipes,
Tightening the pipe with a tightening member provided on the outer periphery of the pair of pipes, and aligning the axial positions of the pair of pipes;
The fixed portions are connected in a first direction along the axial direction of the pipe and a distance adjusting portion that adjusts the distance in the first direction is used to adjust the axial distance between the fixed portions. Adjusting the interval;
Welding the groove portions of the pair of pipes;
A method for manufacturing a piping member, comprising:

Images