JP2005125346A - Groove aligning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a groove aligning device, which is easily moved to a predetermined position, and by which accurate groove alignment of tubes is conducted. <P>SOLUTION: The device has: a 1st arm 9, which is installed so as to be angularly displaceable to a 1st complete round ring 8 clamping an existing pipe 2; a 2nd arm 11, which is installed so as to be angularly displaceable to a 2nd complete round ring 10 clamping a newly-laid pipe 3; a groove aligning stand 12, which is connected to each arm 9, 10 with predetermined angles θ1, θ2, and on which the arms 9, 10 are disposed opposingly to each other; and a movement aid means 13, which aids the groove aligning stand 12 in moving to an installation object 49. Each axis of each complete round rings 27, 30 is coaxially arranged by connecting each arm 28, 31 to a groove aligning stand 29. Further, a groove aligning device 1 is easily moved to a predetermined position by the movement aid means 13, and is thrusted in a state that the groove aligning stand is attached to the other end of the existing tube. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a groove in which the end surface of the second tubular body is abutted against the end surface of the first tubular body to be fixed, and the axes of the first and second tubular bodies are arranged on the same line so that the grooves are aligned. More particularly, the present invention relates to a groove aligning device for two pipe bodies in which butt welding is performed.

  A conventional groove aligning apparatus includes a first arm, a first perfect circle ring, a second arm, a second perfect circle ring, and a groove aligning table. The first arm is provided to be angularly displaceable with respect to the first perfect ring that clamps the fixed tube body coaxially. The second arm is provided so as to be angularly displaceable with respect to a second perfect ring that clamps the new pipe coaxially. The groove aligning table connects the first arm and the second arm at a predetermined angle so that the first arm and the second arm face each other. By connecting each arm to the groove aligning table, each axis of each perfect ring is arranged coaxially. As a result, each tube clamped by each perfect circle ring is coaxially arranged (see, for example, Patent Document 1).

JP 2003-028343 A

  The groove aligning device of the prior art is a device that is premised on being used by being fixedly installed at a predetermined installation location, and is not configured to easily move the installation location. Therefore, in the propulsion method in which a plurality of tubes are sequentially propelled while being butt welded, the tubes are moved with respect to the groove aligning device using propulsion devices such as jacks, cranes and winches, and the grooves are aligned. It is necessary to assemble the tube end of the tube to the device. However, the propulsion device has low positional accuracy and is difficult to assemble to a fixed groove aligning device. In addition, if the pipes are sequentially butt welded, the length of the whole welded pipe will increase and the weight will increase, so it is not possible to move the whole pipe and assemble it into the groove alignment device. It is even more difficult.

  Accordingly, an object of the present invention is to provide a groove aligning device that can be easily assembled at the position of the pipe end of an existing pipe and can align the pipes with high accuracy.

The present invention is a groove aligning device that arranges a second tube body coaxially with respect to a fixed first tube body, and aligns the grooves,
First clamping means fixed coaxially to one end of the first tubular body;
A first arm connected to the first clamping means at one end so as to be angularly displaceable about a first angular displacement axis perpendicular to the axial direction of the first tubular body;
Second clamping means fixed coaxially to one end of the second tubular body;
A second arm connected to the second clamping means at one end so as to be angularly displaceable about a second angular displacement axis perpendicular to the axial direction of the second tubular body;
The other end of the first arm is connected at a predetermined angle, and the other end of the second arm is at a position facing the first arm from 180 degrees to the predetermined angle. A groove alignment base connected at a subtracted angle;
The groove alignment apparatus includes a movement assisting unit that is provided on the groove alignment table and assists the movement of the groove alignment table with respect to the installation target.

  According to the present invention, the groove aligning device includes a first clamping means, a first arm, a second clamping means, a second arm, a groove aligning table, and a movement assisting means. The first clamping means is fixed coaxially to one end of the first tubular body. One end of the first arm is connected to the first clamping means so as to be angularly displaceable around a first angular displacement axis perpendicular to the axial direction of the first tubular body, and the other end is aligned with the groove Connected to the stand. As a result, the first tubular body can be angularly displaced about the first angular displacement axis with respect to the groove alignment table.

  The second clamping means is coaxially fixed to one end of the second tubular body. One end of the second arm is connected to the second clamping means so as to be angularly displaceable around a second angular displacement axis perpendicular to the axial direction of the second tube, and the other end is aligned with the groove Connected to the stand. As a result, the second tubular body can be angularly displaced about the second angular displacement axis with respect to the groove alignment table.

  The other end of the first arm is connected to the groove aligning base at a predetermined angle, and the other end of the second arm is connected to the groove aligning base at a position facing the first arm. They are connected at an angle obtained by subtracting the predetermined angle from 180 degrees. Thus, the axis of the first tube and the axis of the second tube can be easily arranged on the same line.

  The movement assisting means is provided on the groove alignment table and assists the movement of the groove alignment table relative to the installation target. Accordingly, the groove alignment table can move smoothly with respect to the installation target. Since the groove aligning table can be moved smoothly, the groove aligning table can be aligned with high accuracy with respect to the tube body. By aligning in this way, the alignment accuracy between the groove aligning device and the tubular body is increased.

  The groove aligning base is moved in a state where each tube is connected to each arm via each clamping means. After aligning the groove alignment table with respect to the tube, the other end of each arm is connected to the groove alignment table. At this time, alignment between each arm and the groove aligning table can be performed with high accuracy and easily in a short time. After welding, before propelling the first tube, if the groove aligning device is moved to the other end of the first tube and connected by the first clamping means and the first arm, The work is easy, and the working efficiency of groove alignment can be improved.

  Further, according to the present invention, the movement assisting means has a gas ejection part that can freely eject and stop ejection of gas. By ejecting the gas, the groove alignment base is floated from the installation target, and the gas ejection is stopped. In this way, the ascent from the installation target of the groove alignment table is stopped.

  According to the present invention, the movement assisting means has a gas ejection portion that is capable of ejecting gas and stopping ejection. Since the gas jetting unit floats the groove alignment table from the installation target by jetting gas, the friction resistance between the groove alignment table and the installation target can be eliminated. If the tube end is connected to the groove aligning device when the tube is propelled, the movement assisting means lifts the tube, so that the propulsion is easy.

  According to the present invention, the first tubular body can be angularly displaced about the first angular displacement axis with respect to the groove aligning base, and the second tubular body is relative to the groove aligning base. , And can be angularly displaced about the second angular displacement axis. The other end of the first arm is connected to the groove aligning base at a predetermined angle, and the other end of the second arm is connected to the groove aligning base at a position facing the first arm. They are connected at an angle obtained by subtracting the predetermined angle from 180 degrees. Thus, the axis of the first tube and the axis of the second tube can be easily arranged on the same line.

  Further, since the groove aligning table can be smoothly moved by the movement assisting means, the groove aligning table can be aligned with high accuracy with respect to the tubular body. Regardless of the final position accuracy of propulsion, propulsion is performed with the groove aligning table and each arm aligned with high accuracy, that is, with the groove aligning device and tube aligned with high accuracy. The groove alignment accuracy can be continued with high accuracy.

  FIG. 1 is a front view showing a groove aligning apparatus 1 according to an embodiment of the present invention. The groove aligning apparatus 1 arranges the existing pipe 2 which is the fixed first pipe body and the new pipe 3 which is the second pipe body, and matches the grooves. The groove aligning device 1 displaces the new pipe 3 with respect to the fixed existing pipe 2, and opposes one end 4 in the axial direction of the new pipe 3 to one end 5 in the axial direction of the existing pipe 2. Place in position and fit the groove.

  The existing pipe 2 and the new pipe 3 that are butted together after the groove alignment are subjected to butt welding, for example, from the peripheral surface side of the pipe body. As a result, the two tubes 2 and 3 are connected. Further, for example, the size of each of the tubular bodies 2 and 3 is an inner diameter of 581.0 mm, and 600A defined by Japanese Industrial Standard is used.

  The groove aligning device 1 includes a first perfect circle ring 8, a first arm 9, a second perfect circle ring 10, a second arm 11, a groove aligning table 12, a movement assisting means 13, and an external shield 60. Consists of including. The first perfect circle ring 8 is a first clamping means, and is coaxially fixed to one end of the existing pipe 2. The first arm 9 is provided in a pair in the present embodiment, and one end thereof is connected to the first perfect circle ring 8 so as to be angularly displaceable. The second perfect ring 10 is a second clamping means and is coaxially fixed to one end of the new pipe 3. The second arm 11 is provided in a pair in the present embodiment, and one end thereof is connected to the second perfect ring 10 so as to be angularly displaceable.

  The pair of first arms 9 are provided symmetrically with respect to a virtual plane including the axis of the existing pipe 2. The pair of second arms 11 are provided symmetrically with respect to a virtual plane including the axis of the new pipe 3. The first arm 9 is formed to be angularly displaceable about a first angular displacement axis R1 perpendicular to the axis L2 of the existing pipe 2, and the second arm 11 is a first arm perpendicular to the axis L3 of the new pipe 3. Two angular displacement axes R2 are formed so as to be angularly displaceable. Such 1st and 2nd arms 9 and 11 are formed in the same shape and dimension.

  In the groove aligning table 12, the other end portion 21 of the first arm 9 is connected at a first angle θ1, which is a predetermined angle. Further, the groove aligning base 12 forms a second angle θ2, which is an angle obtained by subtracting the first angle θ1 from 180 degrees at the position where the other end 25 of the second arm 11 faces the first arm 9. Connected. The movement assisting means 13 is provided on the groove alignment table 12 and assists the movement of the groove alignment table 12 with respect to the installation object 49, for example, a horizontal floor.

  With the tubular bodies 2 and 3 positioned and abutted against each other, one end surface on the one axial side 16A side of the first perfect ring 8 and one end surface on the one 17A side side in the axial direction of the second perfect ring 10 Are arranged at opposite positions. The groove aligning device 1 includes a first arm holder 18 and a second arm holder 19, and the first perfect circle ring 8 has the first arm holder 18 on the other end surface side on the other axial direction 16 </ b> B side. Provided. The first arm 9 is connected to the first perfect ring 8 via the first arm holder 18.

  The second perfect circle ring 10 is provided with a second arm holder 19 on the other end surface side on the other axial side 17B side. The second arm 11 is connected to the second perfect ring 10 via the second arm holder 19. Each perfect ring 8 and 10 presses each tubular body 2 and 3 from the outer peripheral side in the vicinity of one end face 4 and 5 of each tubular body 2 and 3, and corrects the cross-sectional shape of each tubular body 2 and 3. Each tube 2 and 3 is corrected to a true cylinder, specifically, a shape in which the outer peripheral surface is a true cylinder. At this time, the axis lines L8 and L10 of the perfect circle rings 8 and 10 and the axis lines L2 and L3 of the tube bodies 2 and 3 are corrected and adjusted so as to be substantially coaxial.

  The groove aligning base 12 has a groove aligning base body 26 formed in a substantially plate shape. The groove aligning table 12 includes a pair of first connecting members 22 and a pair of second connecting members 23 on the connecting surface 27 side, which is the surface on one side in the thickness direction of the groove aligning table main body 26. The pair of first connecting members 22 are connected to the other end portions 21 of the pair of first arms 9 so as to be angularly displaceable about an axis perpendicular to the axis L2 of the existing pipe 2. The pair of second connecting members 23 are connected to the other ends 25 of the pair of second arms 11 so as to be angularly displaceable about an axis perpendicular to the axis L3 of the new pipe 3.

  FIG. 2 is a cross-sectional view of the groove aligning device 1 as seen from the section line s3-s3 in FIG. The first and second arm holders 18 and 19 are formed in the same shape and size. Therefore, the second arm holder 19 will be described, and the description of the first arm holder 18 will be omitted. The first and second arms 9 and 11 are formed in the same shape and size. Therefore, the second arm 11 will be described, and the description of the first arm 9 will be omitted.

  The second arm holder 19 includes a pair of holders that are symmetrical to a virtual plane 28 that includes the axis L10 of the second perfect circle ring 10 and extends perpendicularly to the connecting surface 27 on one side in the thickness direction of the groove alignment base body 26. It has bodies 29a and 29b. Each holder body 29a, 29b includes an arm holder fixture 30, two fixing portions 31, a holder body 32, and a holder shaft 33. The holder bodies 29 a and 29 b are fixed to the second perfect ring 10 by the arm holder fixing tool 30. The holder main body 32 is formed in a plate shape that connects the two fixed portions 31 and extends along the virtual plane 28.

  The holder shaft 33 is formed in a cylindrical shape, is perpendicular to the axis L10 of the second perfect ring 10 and is perpendicular to the one surface in the thickness direction of the holder body 32. Projecting outward. The axis of the holder shaft body 33 is the second angular displacement axis R2.

  Each of the pair of second arms 11 is provided with a bearing 34 at one end 24 thereof. Each bearing 34 is fitted into each holder shaft 33 of the second arm holder 19. As a result, the second arms 11 are arranged symmetrically on the virtual plane 28 and are connected to the second arm holder 19 so as to be angularly displaceable. A cylindrical roller shaft 35 is formed at the other end 25 of the second arm 11. The roller shaft 35 extends in the same direction as the holder shaft 33 fitted in the bearing 34, that is, parallel to the second angular displacement axial direction R2. A roller 36 is rotatably attached to the roller shaft body 35. Further, the roller shaft body 35 is provided with a disk 37 for connecting to the groove alignment table 12. The disc 37 has the same outer diameter as the roller 36, and the roller shaft 35 is inserted through the central axis of the disc 37.

  The second arm 11 is bent from the axis of the roller shaft 35, extends perpendicular to the axis of the roller shaft 35, and is provided with a coupling bolt 38 that can rotate around the axis of the roller shaft 35. The coupling bolt 38 rotates to couple the second connecting member 23 and the roller shaft body 35. The coupling bolt 38 is inserted into a U-shaped hole formed in the second connecting member 23, and a nut 39 is screwed to the end opposite to the roller shaft 35. Further, since the second connecting member 23 is connected to the groove aligning base 12, the second arm 11 is connected to the groove aligning base 12 via the second connecting member 23.

  In the groove aligning base 12, two sets of rail portions 40 and 41 are further formed on the groove aligning base body 26. The rail portions 40 and 41 are formed on the connecting surface 27 side of the groove aligning base body 26 so as to extend in parallel with a predetermined interval therebetween. Here, the connecting surface 27 of the groove aligning body 26 is parallel to a pair of edges extending in parallel to the first direction 42 that is the extending direction of the rail portions 40 and 41 and a second direction 43 orthogonal to the extending direction. It is formed in a substantially rectangular shape having another pair of extending edges.

  The two sets of rail portions 40 and 41 are arranged side by side in the first direction 42. The rollers 36 of the pair of first arms 9 are fitted into the rail portions 40 of one set of the two sets of rail portions 40 and 41, respectively. The rollers 36 of the pair of second arms 11 are fitted into the rail portions 41 of the other set, respectively. First and second connecting members 22 and 23 are provided at the ends of the two sets of rail portions 40 and 41 facing each other. The second connecting member 23 can slide in the first direction 42 such that the relative position between the connecting members can be displaced.

  The second connecting member 23 and the rail portion 41 on the second connecting member 23 side are mounted on the mounting plate 45. In addition, a pair of slide rails 44 extending in the first direction 42 is formed on the groove aligning base body 26. The mounting board 45 is provided with slide guides 46 that fit into the slide rails 44, and is formed to be slidable along the slide rails 44.

  Referring to FIG. 1, the outer shield 60 has a substantially annular shape, and in order to perform butt welding in a state where the existing pipe 2 and the new pipe 3 are aligned with each other, 10 is closed from the outer peripheral side. The outer shield main body 61, the rail guide part 62, and the support part 63 are comprised. The outer shield main body 61 closes the first perfect circle ring 8 and the second perfect circle ring 10 from the outer peripheral side. A plurality of rail guide portions 62 are provided and fitted to the slide rail 44. The support part 63 is connected to the outer shield main body 61 and the rail guide part 62. The support portion 63 has one end portion 64 connected to the outer shield main body 61 and the other end portion 65 connected to the rail guide portion 62.

  The outer shield 60 can be fitted to the slide rail 44 by the rail guide portion 62 and can be moved in parallel on the slide rail 44 of the groove aligning base 12. In addition, the outer shield 60 is arranged between the outer peripheral surface of each of the tubular bodies 2 and 3 and the outer peripheral surface of each of the round rings 8 and 10 and the outer shield 60 in a state where the grooves of the respective tubular bodies 2 and 3 are aligned. Means for reducing the pressure of the inner space formed between the inner surface and the peripheral surface is provided. For example, the inner space is reduced to about 6.6 Pa (0.05 Torr).

  Further, the groove aligning apparatus 1 further includes a tube support part 75, a pressing part 76, and a position adjusting part 77. The tube support part 75 is connected to the groove aligning base body 26, circumscribes the new pipe 3, and temporarily receives the new pipe 3. The pressing portion 76 presses the entire new pipe 3. The pressing part 76 is realized by, for example, a hydraulic cylinder. The position adjusting unit 77 abuts on the new pipe 3 and finely adjusts the position of the new pipe 3 with respect to the groove alignment table 12. The position adjustment unit 77 is realized by a jack, for example.

  FIG. 3 is a plan view showing the movement assisting means 13, and FIG. 4 is an enlarged view showing the gas ejection part 50 constituting the movement assisting means 13. The movement assisting means 13 has four gas ejection portions 50 that are capable of ejecting gas and stopping ejection. When the gas ejection unit 50 ejects a gas, for example, air, the groove alignment table 12 is lifted from the installation target 49 and the air ejection is stopped, whereby the gap alignment table 12 is lifted from the installation target 49. To stop.

  Each gas ejection portion 50 has, for example, a substantially disk shape, and has a gas ejection port 50a formed at one end in the thickness direction, and the other end in the thickness direction contacts the other end in the thickness direction of the groove alignment base body 26. Is done. The four gas ejection portions 50 are, for example, arranged at the other end surface portion in the thickness direction of the groove aligning base body 26 and at positions shifted in the second direction 43 from the positions of the other end portions 21 and 25 of the arms 9 and 11. Is done.

  The movement assisting means 13 sends air from the compressor 51 via the hose 52 to the gas ejection part 50, ejects air downward from the gas ejection outlet 50, and causes the movement assisting means 13 to float from the installation object 49. Therefore, the groove alignment table 12 can be lifted by the rising of the movement assisting means 13. The flow rate of the air supplied from the hose 52 to each gas ejection unit 50 is adjusted by the flow rate adjusting valve 53. Each gas ejection part 50 is arrange | positioned in the above positions. Therefore, the movement assistance means 13 can disperse | distribute the dead weight of the groove aligning apparatus 1 suitably, and can surface stably without the groove aligning apparatus 1 inclining with respect to the installation object 49. FIG.

  The gas ejection unit 50 causes the groove alignment table 12 to float from the installation object 49 by ejecting air, and therefore, frictional resistance between the groove alignment table 12 and the installation object 49 can be eliminated. Therefore, the groove alignment table 12 can reduce the frictional resistance generated when moving as much as possible. As a result, the groove aligning table 12 can be assembled with high accuracy to the object to be assembled, for example, the first arm 9 connected to the axial end 5 of the existing pipe 2.

  Moreover, the gas ejection part 50 can stop the rising from the installation target 49 of the groove alignment table 12 by stopping the gas emission, and can bring the groove alignment table 12 into contact with the installation object 49. Therefore, the movement of the groove alignment table 12 can be prevented by the frictional resistance between the groove alignment table 12 and the installation object 49. Thereby, the movement of the groove aligning apparatus 1 can be prevented.

  Referring again to FIG. 1, the groove aligning table 12 further includes a table fixing means 54. The table fixing means 54 prohibits and allows the movement of the groove alignment table 12 with respect to the installation target 49. The table fixing means 54 adjusts the height position of the groove alignment table 12. The table fixing means 54 is screwed to the groove aligning table main body 26, and is displaceable over a position where the table fixing means 54 abuts and separates from the installation target 49 by being screwed and screwed. The table fixing means 54 prohibits the movement of the groove alignment table 12 by bringing it into contact with the installation object 49, and allows the movement of the groove alignment table 12 by separating it. Accordingly, the base fixing means 54 can prevent the pipes 2 and 3 being abutted from being undesirably displaced due to vibrations caused by welding or the like. Welding can be performed while maintaining accuracy.

  FIG. 5 is an enlarged cross-sectional view showing a connecting portion between the first arm 9 and the groove aligning table 12. The first connecting member 22 includes a first insertion part 47 and a first bent part 48. The first insertion portion 47 is fixed to the groove alignment base body 26 and protrudes outward from the connecting surface 27 of the groove alignment base body 26. The first insertion part 47 is formed with a U-shaped hole through which the coupling bolt 38 can be inserted. The U-shaped hole through which the coupling bolt 38 can be inserted is formed in a U-shape, and a slit having an opening is formed on the surface opposite to the groove aligning base body 26. The coupling bolt 38 is easily fitted into the U-shaped hole by entering the U-shaped hole from the opening side. A first bent portion 48 that is bent from the first insertion portion 47 is connected to an end portion 47 a opposite to the end portion on the groove alignment base body 26 side of the first insertion portion 47. . The first bent portion 48 is formed with a bent portion abutting surface 66 parallel to the connecting surface 27 of the groove aligning base body 26.

  A first abutting portion 67 is formed on the other end portion 21 of the first arm 9 closer to the one end portion 20 than the roller 36. The first contact portion 67 has an arm contact surface 68 formed on the other end side of the axis L9 of the first arm 9. The arm contact surface 68 forms a first angle θ1 with respect to a virtual plane including the axis L9 of the first arm 9 and the axis of the roller shaft 35.

  The first arm 9 is angularly displaced with the one end 20 of the first arm 9 as a fulcrum, and the arm contact surface 68 is in surface contact with the bent portion contact surface 66 of the first bent portion 48. Since the bent portion contact surface 66 is formed in parallel with the connecting surface 27 of the groove aligning base body 26, the arm contact surface 68 in contact with the bent portion contact surface 66 is positioned in parallel with the connecting surface 27. Is done.

  Therefore, by merely bringing the first arm 9 that is angularly displaced into contact with the bent portion 48, the connecting surface 27 and the arm contact surface 68 are kept in parallel, and the axis L 9 of the first arm 9 and the groove aligning base body 26 are maintained. Can be positioned at the first angle θ1. Further, in a state where the arm contact surface 68 and the bent portion contact surface 66 are in contact with each other, the coupling bolt 38 is inserted into the U-shaped hole of the first insertion portion 47 and screwed into the coupling bolt 38. 39 is screwed toward a disc 37 provided on the roller shaft 35. As a result, the relative distance between the nut 39 and the disc 37 is reduced, and when the coupling bolt 38 is inserted, the disc 37 comes into contact with the surface of the insertion portion 47 on one side in the axial direction of the coupling bolt 38, The nut 39 abuts on the surface of the insertion portion 47 on the other side in the axial direction. As a result, the disc 37 and the nut 39 cooperatively hold the first connecting member 22 from both axial ends of the connecting bolt 38, and the first arm 9 and the first connecting member 22 are connected. . Accordingly, the first arm 9 and the groove aligning base 12 can be easily detachably fixed at the first angle θ1 by screwing and unscrewing the nut 39. Here, the first angle θ <b> 1 is determined so that the first arm 9 is positioned with respect to the groove alignment table 12 when the first arm 9 fixed to the groove alignment table 12 is viewed from one side in the second direction 43. The angle is clockwise. For example, the first angle θ1 is given smaller than 90 degrees.

  Each roller 36 of the first arm 9 is fitted to each rail portion 40 provided on the groove alignment table 12. By the relative displacement of the first arm 9 and the groove aligning base 12, the roller 36 of the first arm 9 rotates and slides on the rail portion 40, and the first arm 9 The first arm 9 is angularly displaced using the one end 20 of the first arm 9 as a fulcrum. Since the pair of first arms 9 are arranged symmetrically with respect to the axis of the existing pipe 2, the groove aligning table 12 can be slid to the axis of the existing pipe 2 without deviation.

  The angularly displaced first arm 9 is brought into contact with the arm contact surface 68 and the bent portion contact surface 66 of the first bent portion 48, so that the position indicated by a solid line in FIG. The angle formed by the groove alignment table 12 is displaced to a position where the first angle θ1 is obtained. At this time, the coupling bolt 38 of the first arm 9 is inserted into the first insertion portion 47, and the first arm 9 and the groove aligning base body 26 are connected via the first connecting member 22.

  FIG. 6 is an enlarged cross-sectional view showing a connecting portion between the second arm 11 and the groove aligning table 12. Similar to FIG. 6, the second connecting member 23 includes a second insertion portion 69 and a second bent portion 70. The second insertion portion 69 is fixed to the groove aligning base body 26 and protrudes outward from the connecting surface 27 of the groove aligning base body 26. The second insertion part 69 is formed with a U-shaped hole through which the coupling bolt 38 can be inserted. The U-shaped hole through which the coupling bolt 38 can be inserted is formed in a U-shape, and a slit having an opening is formed on the surface opposite to the groove aligning base body 26. The coupling bolt 38 is easily fitted into the U-shaped hole by entering the U-shaped hole from the opening side. Similar to the coupling bolt 38 of the first arm 9, the coupling bolt 38 of the second arm 11 is connected to the insertion portion 69 by the nut 39 and the disc 37. At this time, since the coupling bolt 38 is formed to be rotatable around the axis of the roller shaft body 35, the second arm 11 can be angularly displaced with the roller shaft body 35 as a fulcrum. A second bent portion 70 that is bent from the second insertion portion 69 is connected to the end of the second insertion portion 69 opposite to the end on the groove alignment base body 26 side. The second bent portion 70 is formed with a bent portion abutting surface 71 parallel to the connecting surface 27 of the groove aligning body 26.

  A second abutting portion 72 is formed at the other end portion 25 of the second arm 11 closer to one end portion than the roller 36. The second contact portion 72 has an arm contact surface 73 formed on the other end side of the axis L11 of the second arm 11. The arm contact surface 73 forms a second angle θ2 with respect to a virtual plane including the axis L11 of the second arm 11 and the axis of the roller shaft 35. The second angle θ2 is a value obtained by subtracting the first angle θ1 from 180 degrees.

  The second arm 11 is angularly displaced with the other end as a fulcrum, and the arm contact surface 73 comes into surface contact with the bent portion contact surface 71 of the second bent portion 70. Since the bent portion contact surface 71 is formed in parallel with the connecting surface 27 of the groove aligning body 26, the arm contact surface 73 that contacts the bent portion contact surface 71 of the second bent portion 70 is: It is positioned parallel to the connecting surface 27 of the groove aligning base body 26.

  Therefore, only by bringing the second arm 11 that is angularly displaced into contact with the second bent portion 70, the connecting surface 27 of the groove aligning base body 26 and the arm contact surface 73 are kept parallel to each other. The axis L11 and the groove aligning base body 26 can be positioned at the second angle θ2. Further, in a state where the arm contact surface 73 and the bent portion contact surface 71 are in contact with each other, the coupling bolt 38 is inserted into the U-shaped hole portion of the second insertion portion 69 and screwed into the coupling bolt 38. 39 is screwed toward a disc 37 provided on the roller shaft 35. As a result, the relative distance between the nut 39 and the disc 37 is shortened, and in the inserted state of the coupling bolt 38, the disc 37 comes into contact with the surface of the insertion portion 69 on one side in the axial direction of the coupling bolt 38. The nut 39 abuts on the surface of the insertion portion 69 on the other side in the direction. As a result, the disc 37 and the nut 39 cooperate to sandwich the second connecting member 23 from both axial ends of the connecting bolt 38, and the second arm 11 and the second connecting member 23 are connected. . Accordingly, the second arm 11 and the groove aligning base 12 can be easily detachably fixed at the second angle θ2 by screwing and unscrewing the nut 39.

  Here, the second angle θ <b> 2 is determined so that the second arm 11 is located with respect to the groove alignment table 12 when the second arm 11 fixed to the groove alignment table 12 is viewed from one side in the second direction 43. The angle is clockwise. For example, the second angle θ2 is given larger than 90 degrees.

  Each roller 36 of the second arm 11 is fitted to each rail portion 41 provided on the groove alignment table 12. The second arm 11 moves to the position of the second arm 11 indicated by a solid line. That is, the roller 36 rotates in a state of being fitted to the rail portion 41, translates to a position where the roller 36 abuts against the second insertion portion 69, and the coupling bolt 38 of the second arm 11 moves to the U of the second insertion portion 69. Insert through the hole. Since the second arm 11 is arranged symmetrically with respect to the axis of the new pipe 3, the new pipe 3 can be slid to the rail portion 41 of the groove alignment table 12 without deviation.

  Next, the second arm 11 moves to the position of the second arm 11 indicated by the temporary wire by being angularly displaced with the other end 25 as a fulcrum. That is, the arm contact surface 73 of the second arm 11 is in contact with the bent portion contact surface 71 of the second bent portion 70, and the angle formed between the second arm 11 and the groove aligning base 12 is the first. It is displaced to a position where it becomes two angles θ2.

  Referring to FIG. 2, the second connecting member 23 and the rail portion 41 on the second connecting member side are mounted on the mounting plate 45. The mounting board 45 is provided with a slide guide 46 fitted to the slide rail 44, and is formed to be slidable in the first direction 42 along the slide rail 44. Accordingly, the second arm 11 coupled to the second coupling member 23 can be translated along the slide rail 44.

  Therefore, according to the configuration of the groove aligning device 1, the rollers 36 of the first and second arms 9 and 11 formed in the same shape and size are respectively rail portions 40 formed on the groove aligning table 12. , 41. That is, the first arm 9 and the second arm 11 are disposed at positions facing each other. Thus, the existing pipe 2 and the new pipe 3 that are indirectly connected to the first and second arms 9 and 11 are arranged in the first direction 42 and the second direction 43 without being shifted from each other.

  The groove aligning base 12 is connected to the other end 21 of the first arm 9 at a first angle θ1, and is connected to the other end 25 of the second arm 11 at a second angle θ2. The The second angle θ2 is connected to form an angle obtained by subtracting the first angle θ1 from 180 degrees. As a result, the existing pipe 2 and the new pipe 3 that are indirectly connected to the first and second arms 9 and 11 can be arranged with the same distance in the height direction of the groove aligning body 26. The height direction is a direction perpendicular to the connecting surface 27.

  Therefore, the existing pipe 2 and the new pipe 3 to be clamped are connected to the groove alignment table 12 by the arms 9 and 11 of the groove aligning device 1, and the axes L2 and L3 of the existing pipe 2 and the new pipe 3 are connected to the first. Positioning can be performed on the same line without shifting in the two directions 43 and the height direction. As a result, the positioning of the tubes can be performed easily and reliably in a short time.

  FIG. 7 is a cross-sectional view showing the procedure of the operation of welding the existing pipe 2 and the new pipe 3 with the groove aligning equipment 80 including the groove aligning device 1. FIG. 7 (1) shows a state in which the groove aligning device 1 is installed with respect to the existing pipe 2, FIG. 7 (2) shows a state in which the new pipe 3 is carried in, and FIG. FIG. 7 (4) shows the state where the capsule carriage 83 constituting the groove alignment facility 80 is moved and connected to the new pipe 3, and FIG. 7 (4) carries the welding carriage constituting the capsule carriage 83 into the groove alignment section. Shows the state.

  FIG. 8 is a cross-sectional view showing the procedure after the procedure shown in FIG. 7 and the operation of the groove aligning apparatus 1 after welding. FIG. 8 (1) shows a state in which the arms 9 and 11 are removed from the groove aligning base 12, and FIG. 8 (2) shows a state in which the groove aligning base 12 is moved. Shows a state in which the tube support device 82 constituting the groove alignment facility 80 is moved, and FIG. 8 (4) shows a state in which the groove alignment table 12 is further moved and the first arm 9 is attached. Show. FIG. 9 is a cross-sectional view showing a procedure subsequent to the procedure shown in FIG. 8, and an operation procedure for propelling the welded existing pipe 2 and new pipe 3 by the groove aligning facility 80. FIG. 9 (1) shows a state in which the existing pipe is propelled, and FIG. 9 (2) shows a state in which the external shield 60 is moved with respect to the groove alignment table 12.

  The groove alignment facility 80 includes a groove alignment apparatus 1, a tube body floating carriage 81, a tube body support apparatus 82, and a capsule carriage 83. The tube levitation carriage 81 supports the new pipe 3 and can move the new pipe 3 movably along a virtual plane including the axis L3 of the new pipe 3 and the second angular displacement axis R2. Here, the vertical direction 84 is a direction in which the axis L2 of the existing pipe 2 extends, the horizontal direction 85 is a direction in which the first angular displacement axis R1 extends, and the vertical direction 86 is a direction orthogonal to the vertical direction 84 and the horizontal direction 85. And

  The tube levitation carriage 81 can move the new pipe 3 in the vertical direction 84. Further, the tubular body trolley 81 can move in the lateral direction 85. In other words, the tube levitation carriage 81 supports the new pipe 3 and can move the new pipe 3 so as to be displaceable along a virtual plane including the axis L3 of the new pipe 3 and the second angular displacement axis R2. .

  FIG. 10 is a cross-sectional view showing the tubular body support device 82 as viewed from the section line s7-s7 in FIG. The tube support device 82 can be moved to a position where the new tube 3 is provided. The tube support device 82 supports one end of the new tube 3. The tubular body support device 82 can adjust the position of the tubular body 86 in the vertical direction 86 when the stacking portion 88 that supports the tubular body is displaced along the vertical direction 86. Therefore, the tube support device 82 can assist the operation of making the axis L2 of the existing pipe 2 and the axis L3 of the new pipe 3 coaxial. The tube support device 82 supports the new tube 3 by bringing the new tube 3 into contact with the cylindrical rotary body 89 from below. The rotator 89 extends in a direction orthogonal to the axis L3 of the new tube 3 while supporting the new tube 3, and the outer peripheral surface of the rotator 89 and the outer peripheral surface of the new tube 3 abut. The rotating body 89 rotates around the axis of the rotating body 89. As a result, the new pipe 3 can easily slide in the direction of the axis L3 of the new pipe 3. In particular, the rotating body 3 is formed by lining urethane rubber on the outer peripheral surface thereof.

  The capsule carriage 83 has a tubular shape and includes a welding carriage 87 in the pipe. The capsule carriage 83 is connected to one end of the new pipe 3. The welding carriage 87 is disposed at a position where the grooves of the tube bodies 2 and 3 are aligned, and performs welding, for example, electron beam welding, to mechanically connect the tube bodies 2 and 3.

  FIG. 11 is a flowchart showing a procedure of an operation for propelling the existing pipe 2 and the new pipe 3 by aligning the grooves and welding them. Step a0 is a state in which an equipment space in which the existing pipe 2 and the new pipe 3 are arranged is formed as shown in FIG. 7 (1). The facility space may be a narrow space such as a shaft or a common site such as a tunnel and a common groove exit. A new pipe 3 is prepared. A second perfect ring 10 for correcting the shape of the one end 4 is fixed to the one end 4 of the new pipe 3. A first perfect ring 8 for correcting the shape of the other end is fixed to the other end of the new pipe. When the preparation for the groove alignment operation is completed, the process proceeds to step a1.

  In step a1, as shown in FIG. 7 (2), the new pipe 3 is carried in by the pipe body floating carriage 81 and the pipe body support device 82. The second arm 11 connected to the axial direction one end 4 of the new pipe 3 has the other end 25 connected to the groove aligning base 12. As a result, the new pipe 3 is aligned with the existing pipe 2 and a groove, and when the axial one end 4 of the new pipe 3 is disposed at a position facing the axial one end 5 of the existing pipe 2, step a2 Proceed to

  In step a2, as shown in FIG. 7 (3), the capsule carriage 83 is connected to the other axial end of the new pipe 3, and the process proceeds to step a3. In step a3, as shown in FIG. 7 (4), the welding carriage 87 is carried into the new pipe 3 and moved to the groove alignment section. The operator translates the outer shield 60 along the slide rail 44 to the groove aligning portion. The operator uses the welding carriage 87 to butt-weld the existing pipe 2 and the new pipe 3 and mechanically connect them, and proceeds to step a4.

  In step a4, as shown in FIG. 8 (1), the welding carriage 87 is recovered from the groove alignment portion to the capsule carriage 83. Further, the operator removes the arms 9 and 11 from the groove aligning table 12 and the perfect circular rings 8 and 10. Further, the operator translates the outer shield 60 along the slide rail 44 toward the other axial end of the new pipe 3, confirms the welding result of the groove alignment portion, and proceeds to step a5.

  In step a5, as shown in FIG. 8 (2), the capsule carriage 83 is moved to a position separated from the new pipe 3. Further, the groove aligning table 12 is moved along the axis L3 of the new pipe 3 toward the other axial end of the new pipe 3, and the process proceeds to step a6. Since the groove alignment table 12 includes the movement assisting means 13, the operator can move the groove alignment table 12 smoothly.

  In step a6, as shown in FIG. 8 (3), the operator removes each of the perfect circle rings 8 and 10 from the groove aligning portion. In addition, the operator arranges the tube support device 82 on the upstream side in the moving direction of the groove aligning table 12 in step a5 and below the new pipe 3. The new pipe 3 is moved from below, and the process proceeds to step a7.

  In step a7, as shown in FIG. 8 (4), the groove aligning table 12 is moved to the other axial end of the new pipe 3. The first arm 9 is connected to the other axial end of the new pipe 3. The first arm 9 and the groove alignment base 12 are connected, and the process proceeds to step a8. Since the groove aligning table 12 can be moved smoothly, the groove aligning table 12 can be easily aligned with the new pipe 3 with high accuracy.

In step a8, as shown in FIG. 9 (1), the existing pipe 2 and the new pipe 3 are propelled to the other axial direction 16b of the existing pipe 2, and the process proceeds to step a9. At this time, since the groove alignment table is levitated, propulsion is easy.
In step a9, as shown in FIG. 9 (2), the operator translates the outer shield 60 along the slide rail 44 to the groove aligning portion, makes the same state as step a0, and proceeds to step a10. . In step a10, this operation is finished.

  According to the present embodiment, the movement assisting means 13 is provided on the groove alignment table 12 and assists the movement of the groove alignment table 12 with respect to the installation target 49. As a result, the groove aligning table 12 can move smoothly with respect to the installation object 49. Since the groove aligning table 12 can be moved smoothly, the groove aligning table 12 can be aligned with respect to the tubular bodies 2 and 3 with high accuracy. By aligning in this way, the alignment accuracy between the groove aligning device 1 and the tubular bodies 2 and 3 is increased. Regarding the alignment of the groove aligning table 12, the existing tube 2 and the new tube 3, when the groove aligning table 12 is lifted, the existing tube 2 and the new tube 3 can be accurately positioned. For positioning the existing pipe 2 and the new pipe 3, the groove alignment table 12, the tube body floating carriage 81 and the pipe end support device 82 are used.

  Moreover, the operation is easy, and the working efficiency of the groove alignment can be improved. Further, since the groove can be aligned with an accuracy that allows butt welding by electron beam welding or the like, for example, within an error of 0.2 mm, butt welding can be easily performed.

It is a front view which shows the groove aligning apparatus 1 which is one Embodiment of this invention. It is sectional drawing which looked at the groove aligning apparatus 1 from the s3-s3 cut surface line of FIG. It is a top view which shows the movement assistance means 13 which comprises the groove aligning apparatus 1. FIG. FIG. 4 is an enlarged view showing a gas ejection part 50 constituting the movement assisting means 13. FIG. 3 is an enlarged cross-sectional view showing a connecting portion between a first arm 9 and a groove alignment base 12. FIG. 3 is an enlarged cross-sectional view showing a connecting portion between a second arm 11 and a groove alignment table 12. It is sectional drawing which shows the procedure of the operation | movement which welds the existing pipe 2 and the new pipe 3 by groove preparation by the groove alignment equipment 80 provided with the groove alignment apparatus 1. FIG. FIG. 8 is a cross-sectional view showing the procedure after the procedure shown in FIG. 7 and the operation of the groove aligning apparatus 1 after welding. FIG. 9 is a cross-sectional view illustrating a procedure subsequent to the procedure illustrated in FIG. 8, in which the existing pipe 2 is propelled by the groove alignment facility 80. It is sectional drawing which shows the tube body support apparatus 82 seeing from the s7-s7 cut surface line of FIG. 7 (1). It is a flowchart which shows the procedure of the operation | movement which unites and welds the existing pipe 2 and the new pipe 3 for welding.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Groove alignment apparatus 2 Existing pipe 3 New pipe 8 1st perfect circle ring 9 1st arm 10 2nd perfect circle ring 11 2nd arm 12 Groove alignment stand 13 Movement assistance means 49 Installation object 50 Gas ejection Part

Claims (2)

A groove aligning device that arranges a second tube coaxially with a fixed first tube and aligns the grooves,
First clamping means fixed coaxially to one end of the first tubular body;
A first arm connected to the first clamping means at one end so as to be angularly displaceable about a first angular displacement axis perpendicular to the axial direction of the first tubular body;
Second clamping means fixed coaxially to one end of the second tubular body;
A second arm connected to the second clamping means at one end so as to be angularly displaceable about a second angular displacement axis perpendicular to the axial direction of the second tubular body;
The other end of the first arm is connected at a predetermined angle, and the other end of the second arm is at a position facing the first arm from 180 degrees to the predetermined angle. A groove alignment base connected at a subtracted angle;
A groove alignment apparatus, comprising: a movement assisting means which is provided on the groove alignment table and assists the movement of the groove alignment table with respect to the installation target.   The movement assisting means has a gas ejection portion that can freely eject and stop the ejection of gas, and by ejecting the gas, the groove alignment base is lifted from the installation target, and the gas ejection is stopped by stopping the ejection of the gas. 2. The groove aligning apparatus according to claim 1, wherein the rising of the aligning table from the installation target is stopped.

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