JP2002066788A - Pipe groove matching jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe groove matching jig which can easily join pipe grooves in a short time. SOLUTION: The pipe groove matching jig 10 is a jig for positioning an edge 12a of a fixed pipe 12 and an edge 14a of an object pipe 14, and consists of a fixing ring 16, supporting bars 18 and adjustment volts 20. The fixing ring 16 is installed in the fixed pipe 16 and the supporting bars 18 is supported by the fixing ring 16 in order to slide freely. The adjustment volt 20 is screwed in a tip of the supporting bar 18 and a pad metal 20a at the tip touches with the object pipe 14 by screwing up the adjustment volt 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe groove adjusting jig, and more particularly to a pipe groove aligning jig for aligning the ends of pipes when welding the pipes to each other.

[0002]

2. Description of the Related Art Conventionally, in plant construction, pipes are connected at a production factory to the extent that transportation is not troublesome, and the pipes are carried to a construction site. At the construction site, the ends of the pipes are joined together, a groove inspection is performed, and welding is performed. At this time, the position of the pipe end is adjusted in consideration of a groove gap at the pipe end, a step on the inner surface of the pipe, a step on the outer shape of the pipe, and the like.

[0003] As shown in FIG. 7, a conventional pipe groove jig includes a band 1 and a plurality of adjustment bolts 2, 2... Supported by the band 1. First, a fixed pipe (hereinafter referred to as a fixed pipe) 3
Attach the band 1 with bolts 4 and nuts 5.
Then, the pipe (hereinafter, the target pipe) 6 to be connected is approached to the fixed pipe 3 while being received by a suspending tool such as a wire or a chain block, a receiving stand, a receiving tool, or the like. Next, the adjustment bolts 2, 2,... Are tightened, and the ends thereof are brought into contact with the target pipe 6 to support the target pipe 6. At this time, the position of the target pipe 6 can be adjusted by adjusting the amount of tightening of the adjustment bolt 2.

Incidentally, the fixed pipe 3 and the target pipe 6 have a tolerance in the manufacturing accuracy in the manufacturing factory. For this reason, the positioning of the fixed tube 3 and the target tube 6 is performed by using one of the fixed tube 3 and the target tube 6 as a gauge, and distributing and absorbing errors within a tolerance. However, if the pipe is circular, the error can be read, so the tolerance can be easily assigned. However, if the pipe is deformed (for example, a large-diameter pipe or thin-walled pipe), Subtle differences in diameter cannot be determined and tolerances cannot be easily assigned. Therefore, it is necessary to adjust the tolerances, adjust the pipe ends, or correct the deformation of the pipes.

[0005]

However, while correcting the deformation of the pipes and subtly changing the distribution of the tolerances,
The work of aligning the pipe ends requires a technique, and has the disadvantage that it takes time and costs.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to provide a pipe groove fitting jig that can easily and easily perform pipe groove fitting. .

[0007]

In order to achieve the above object, the present invention provides a pipe groove alignment jig for aligning the ends of two pipes with one another of the two pipes. A fixing means to be attached, a tip end supported by the fixing member and capable of adjusting a position in a radial direction of the one pipe, and the tip end is brought into contact with the other pipe of the two pipes. A plurality of adjustment members for adjusting the position of the other pipe, and a moving mechanism for moving the plurality of adjustment members,
It is characterized by having.

According to the present invention, since the adjusting member can be moved, the supporting position of the pipe by the adjusting member can be freely adjusted, so that the pipe groove can be quickly set and the pipe can be adjusted. The deformation can be corrected.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a pipe groove alignment jig according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a pipe groove adjusting jig 10, and FIGS. 2 and 3 are a side view and a front view of the pipe groove aligning jig shown in FIG. The fixed pipe 12 shown in these figures is already installed and fixed, and the target pipe 14 is
It is supported by a hanger, a cradle, etc. (not shown). Also,
End 12a of fixed tube 12 and end 14 of target tube 14
a is subjected to groove processing, and the end portions 12a, 1a
4a are connected by welding.

The pipe groove adjusting jig 10 is a jig for adjusting the positions of the end 12a and the end 14a in order to perform welding, and mainly includes a fixing ring 16, and four support rods 18,18. .., Adjustment bolts 20, 20,.

The fixing ring 16 is formed in a ring shape from a material having high rigidity. The inner peripheral surface is formed in a circular shape with high roundness, and has the same size as the outer peripheral surface of the fixed tube 12. The fixing ring 16 includes a half body 16a and a half body 16b. The half body 16a has through holes 17a, 17a,..., And the half body 16b has screw holes 17b, 17b,. Have been. The fixing ring 16 has a half 16 a so as to sandwich the fixing tube 12.
16b, the screws 24 are passed through the through holes 17a and tightened into the screw holes 17b to be fixed to the fixed tube 12. The fixing position of the fixing ring 16 is set at the end 12.
Select a position that is close to “a” and does not hinder the groove alignment and welding operations.

The fixing ring 16 has four through holes 22,
22 are formed. The through holes 22, 22,...
They are formed at equal intervals and in the axial direction of the fixing ring 16. The support rod 18 is inserted through the through hole 22,
It is slidably supported. A flat surface 18 a is formed on the support rod 18, and the distal end of a fixing screw 26 tightened from outside the fixing ring 16 abuts on the flat surface 18 a. Therefore, the support rod 18 can be slid by loosening the fixing screw 26, and the fixing screw 2 can be slid.
By tightening 6, the support rod 18 can be fixed.

A screw hole 18a is formed at the tip of the support rod 18, and an adjusting bolt 20 is screwed into the screw hole 18a from the outside. At the tip of the adjustment bolt 20,
When the adjusting bolt 20 is tightened, the abutment 20 a comes into contact with the surface of the target tube 14. In addition, a material that can prevent the surface of the target pipe 14 from being scratched is selected for the backing plate 20a.

The pipe groove jig 10 is made of, for example, an aluminum alloy to reduce the weight.
The adjustment bolt 20, the screw 24, and the fixing screw 26 are configured to be able to be tightened by the same tool (for example, a hexagon wrench).

.. In FIG. 3 are C-clamps and spacer blocks, which are attached as necessary when or after the positioning of the ends 12a, 14a.

Next, the operation of the pipe groove adjusting jig 10 configured as described above will be described.

First, the fixing ring 16 is attached to the fixing tube 12. That is, the halves 16a and 16b of the fixing ring 16 are aligned so as to sandwich the fixing tube 12, and the halves 16a and 16b are fixed by the screws 24, 24. At this time,
When the fixed tube 12 is deformed, the inner peripheral surface of the fixed ring 16 presses the outer surface of the fixed tube 12 to correct the deformation of the fixed tube 12. Since the inner peripheral surface of the fixing ring 16 is formed in a circular shape with high roundness, the outer surface of the fixing tube 12 is also corrected into a circular shape with high roundness.

Next, the support rod 18 is inserted into the through hole 22 of the fixing ring 16. Then, the support rod 18 is slid, and the position of the adjustment bolt 20 attached to the tip of the support rod 18 is adjusted. At this time, the lower support rod 18
To the end 12a of the fixed tube 12 more than the upper support rod 18.
Project from

Next, the target pipe 14 is moved while being supported by a chain block or a pedestal (not shown), and the end 14 a is brought closer to the end 12 a of the fixed pipe 12. At this time, since the lower support rod 18 protrudes from the upper support rod 18, the target pipe 14 can be easily approached from above.

Next, while adjusting the position of the adjustment bolt 20 by sliding the support rods 18, 18,..., The adjustment bolt 20 is tightened to bring the metal plate 20a into contact with the outer surface of the target tube 14. At this time, when the amount of tightening of the adjustment bolt 20 is adjusted, the pad 20a moves in the radial direction of the fixed tube 12, so that the position of the end 14a of the target tube 14 can be adjusted in the radial direction of the fixed tube 12. Further, when the slide amount of the support rod 18 is adjusted, the position at which the paddle 20a supports the target tube 14 changes, so that the deformation of the target tube 14 can be corrected. As a result, the deformation of the fixed tube 12 and the target tube 14 is corrected, and the fixed tube 12 and the target tube 14 are positioned at predetermined positions, and are in a state suitable for welding.

As described above, in the pipe groove jig 10 of the present embodiment, the adjustment bolt 20 is attached to the support rod 18 and
Since the support rod 18 is slidably attached to the fixing ring 16, the metal plate 20 a can be moved in the axial direction and the radial direction of the fixed tube 12. Therefore, the target pipe 1
4 can be freely changed, and the target tube 1 can be changed.
Adjustment of the position 4 can be performed easily and accurately. In addition, the angle of the target pipe 14 can be adjusted by moving each paddle 20 a in the axial direction of the fixed pipe 12.

Further, since the pipe ring alignment jig 10 has a high roundness of the fixing ring 16, the deformation of the fixing pipe 12 when the fixing ring 16 is attached to the fixing pipe 12 can be corrected. Thereby, the fixed tube 12 is used as a gauge,
Errors can be sorted out and absorbed within the range of the tolerance.

In the above-described embodiment, the fixing ring 16 is attached to the fixed tube 12, but the fixing ring 16 may be attached to the target tube 14, and the pad 20a may be brought into contact with the fixed tube 12. .

FIG. 4 is a side view showing a pipe groove alignment jig 30 according to the second embodiment. In addition, the first shown in FIG.
Members that are the same as or similar to those in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the pipe groove jig 30 shown in FIG. 1, a fixing ring 32 is attached to the target pipe 14. The fixing ring 32 is composed of a half body 32a and a half body 32b, and is attached to the target pipe 14 by inserting a screw 34 into a through hole 38a and tightening it into a screw hole 38b. The inner peripheral surface of the fixing ring 32 is formed in a circular shape with high roundness, and has the same size as the outer peripheral surface of the target tube 14. The fixing ring 32 has through holes 34, 34.
Are formed, and the support rod 18 is penetrated through the through hole 34. The support rod 18 is fixed to the fixing ring 32 by tightening a fixing screw 36.

Even if the target pipe 14 is deformed, the deformation of the pipe groove jig 30 constructed as described above is corrected by attaching the fixing ring 32 so that the end 14a is true. It is formed in a highly circular shape. On the other hand, the deformation of the fixed tube 12 is also corrected by attaching the fixed ring 16, and the end 12a is formed in a circular shape.
Therefore, the pipe groove can be easily adjusted simply by adjusting the amount of tightening of the adjustment bolts 20, 20,... And adjusting the position of the end 14a.

FIG. 5 is a side view showing a pipe groove jig 40 according to the third embodiment.

A pipe groove jig 4 according to the third embodiment.
0 is different from the pipe groove jig 30 of the second embodiment shown in FIG. 4 in that the fixing rings 16 and 32 are connected. That is, the right-hand bolt 42 is attached to the fixing ring 16 of the pipe groove fitting jig 40.
6, and a left-handed bolt 44 is attached to the fixing ring 32 along the axial direction of the fixing ring 32. The bolts 42 and 44 are screwed into a nut member 46 having a screw hole for a right screw at one end and a screw hole for a left screw at the other end.

In the pipe groove adjusting jig 40 configured as described above, the distance between the fixing rings 16 and 32 can be adjusted by rotating the nut member 46. That is, the end 12 a of the fixed tube 12 and the end 14
The distance from a can be easily finely adjusted.

FIG. 6 is a side view showing a pipe groove jig 50 according to a fourth embodiment.

In the pipe groove alignment jig 50 shown in the figure, a jumper plate 54 is attached to each end of each support rod 18. The jumper plate 54 is attached to the support rod 18 by bolts 56, and the jumper plates 54, 54 are connected to each other by bolts 58.
And a nut 60. Further, the fixing ring 16 is provided with a vertical bolt 52 along the axial direction of the fixing ring 16. Two nuts 62, 64 are attached to the upright bolt 52, and the nut 62, 64 in a state where the jumper plate 54 is penetrated by the upright bolt 52.
64.

In the pipe groove adjusting jig 50 of the fourth embodiment configured as described above, the turning plate 54 is moved in the axial direction of the fixed pipe 12 by rotating the nuts 62 and 64. As a result, the adjustment bolt 2 is supported via the support rod 18.
You can easily fine-tune the 0 position.

The shape and number of the support rods 18 are not limited to those in the above-described embodiment. For example, when the diameter of the fixed tube 12 or the target tube 14 is large, the support rods 18 may be used.
It is good to increase the number of.

[0035]

As described above, according to the pipe groove alignment jig of the present invention, since the adjusting member can be moved, the position of the pipe supported by the adjusting member can be freely adjusted. The pipe groove can be quickly adjusted, and the deformation of the pipe can be corrected.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a pipe groove alignment jig according to a first embodiment.

FIG. 2 is a side view showing the pipe groove alignment jig shown in FIG. 1;

FIG. 3 is a front view showing the pipe groove alignment jig shown in FIG. 1;

FIG. 4 is a side view showing a pipe groove jig according to a second embodiment.

FIG. 5 is a side view showing a pipe groove jig according to a third embodiment.

FIG. 6 is a side view showing a pipe groove jig according to a fourth embodiment.

FIG. 7 is a side view showing a conventional apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Piping groove jig, 12 ... Fixed pipe, 14 ... Target pipe, 16 ... Fixed ring, 18 ... Support rod, 20 ... Adjustment bolt

Claims (2)

[Claims] 1. A pipe groove alignment jig for aligning ends of two pipes, wherein: a fixing means attached to one of the two pipes; and a fixing means supported by the fixing member; A plurality of adjustment members having a tip that can adjust the position in the radial direction of the pipe, and adjusting the position of the other pipe by bringing the tip into contact with the other pipe of the two pipes. And a moving mechanism for moving the plurality of adjusting members. 2. A pipe groove alignment jig according to claim 1, wherein said fixing means presses the outer peripheral surface of said one pipe over the entire circumference to suppress deformation of said one pipe.