KR102511920B1 - Setting tool for maintenance· overhaul·arranging of flange - Google Patents

Abstract

The present invention relates to a setting tool for maintenance, inspection and alignment of a flange, comprising: a bolt frame portion composed of bolts disposed in two rows on the left and right sides and bolts disposed on the upper and lower portions; A flange adjustment unit composed of left and right plate guides screwed to each bolt, front and rear adjustment jigs assembled to be movable forward and backward on the plate guide, and left and right adjustment bolts screwed in pairs to penetrate the adjustment jig; ; Four alignment boxes installed in each of the four places where bolts intersect in the bolt frame unit, alignment jigs screwed to the horizontally disposed bolts and installed at the top and bottom, and screws at the ends of the bolts and on both sides of the alignment jig. It includes a setting part before and after the flange work consisting of a plurality of fastening nuts that are coupled, and makes it easy to adjust the gap between the flanges during gasket replacement work according to the withdrawal and insertion of gaskets between flanges, and accurate alignment during assembly. It has the effect of making it easy to do.

Description

Setting tool for maintenance/overhaul/arranging of flange}

The present invention relates to a setting tool for maintenance, inspection and alignment of flanges, and more specifically, to enable easy adjustment of gaps between flanges when replacing gaskets by drawing out and inserting gaskets between flanges, and to facilitate accurate and easy alignment during assembly. It relates to a setting tool for flange maintenance, inspection and alignment.

In general, the "setting tool for maintenance, inspection and alignment of flanges" has already been widely disclosed, so detailed descriptions will be omitted. Registered Patent No. 10-1107805 "Flange Alignment Jig for High Pressure Main Steam Piping" and Utility Model Registration No. 20-0220329 No. “Tools for Flange Alignment”, etc. may be referred to.

On the other hand, the "high pressure main steam piping flange alignment jig" is intended to effectively position the upper and lower flanges for assembly during pipe assembly work, and operates the lower flange protruding and dislocated from the jig body installed on the upper flange. Although the bolt holes are aligned by pushing them with the processing cylinder, there is a problem that the spaced state cannot be maintained when replacing the gasket.

In addition, the “tool for aligning flanges” is intended to align flanges and facilitate disassembly of flanges when disassembling and combining flanges with gaskets inserted to connect equipment and pipes or pipes and pipes among industrial facilities. There is a problem in that the bolt fastening is inconvenient because the clamp is blocking the bolt ball fastening.

On the other hand, there is a problem in that the close contact portion of the flange surface is damaged as the gasket is inserted between the flanges using a screwdriver and opened during maintenance work of the conventional gasket between the flanges.

In addition, there is a problem in that the possibility of leakage due to incorrect alignment increases as most of the alignment between the flanges depends on the experience of the operator.

[Patent Document 0001] Registered Patent No. 10-1107805 "High Pressure Main Steam Piping Flange Alignment Jig" (Announcement 2012.01.25.) [Patent Document 0002] Utility Model Registration No. 20-0220329 "Tool for Flange Alignment" (Published on May 2, 2001)

The present invention was invented to solve the above problems, and its purpose is to facilitate the withdrawal and insertion of gaskets when replacing gaskets between flanges.

Another object of the present invention is to easily adjust the distance between flanges during a gasket replacement operation in which a gasket is drawn out and inserted between the flanges.

Another object of the present invention is to accurately and conveniently align flanges when assembling gaskets between flanges.

Another object of the present invention is to prevent leakage caused by damage to a flange surface during an existing gasket replacement operation and misalignment during assembly.

Another object of the present invention is to minimize damage to the flange surface and to easily adjust the degree of spacing between the flanges.

Another object of the present invention is to enable accurate alignment between flanges using a tool without depending on the experience of the operator.

The present invention for achieving the above technical problem is a bolt frame portion composed of alignment bolts arranged vertically in two rows on the left and right sides, and alignment bolts arranged horizontally on the upper and lower sides; Left and right plate guides freely inserted into each of the vertically arranged alignment bolts, a pair of adjustment jigs assembled and installed to be movable forward and backward on each of the plate guides, and a pair of adjustment bolts screwed together to pass through the adjustment jigs And a flange adjustment portion consisting of; In the bolt frame part, four alignment boxes inserted and installed freely in each of the four places where the alignment bolts intersect, and an alignment jig inserted and installed in each of the alignment bolts disposed in the upper and lower portions so as to be freely moved, and in the bolt frame part It is characterized in that it comprises a setting portion before and after the flange operation consisting of a plurality of tightening nuts screwed to the ends of each alignment bolt and both sides of the alignment jig.

The bolt frame part includes alignment bolts arranged vertically in two rows on the left and right sides, alignment bolts arranged horizontally up and down, and the alignment bolts being assembled to cross each other at the ends and installed to be movable along the alignment bolts. It is characterized in that it comprises an alignment box to be.

The flange adjustment unit penetrates each of the plate guides movably inserted into the alignment bolts arranged vertically side by side on the left and right sides, the front and rear adjustment jigs movably assembled and installed in each of the plate guides, and the adjustment jigs. It is characterized in that it is composed of a pair of adjusting bolts that are screwed together.

The plate guide includes a guide body formed in a rectangular parallelepiped shape, a plurality of bolt holes formed to penetrate in the width direction so as to be inserted into alignment bolts arranged vertically in two rows, and one surface spaced apart from the bolt holes. It is characterized in that it comprises a sliding surface formed so that the adjustment jig can slide back and forth along the sliding surface, and inclined grooved jaws formed on both sides of the sliding surface in the longitudinal direction so as to be able to slide along the sliding surface.

The adjustment jig is formed of guide protrusions protruding in a triangular shape at both ends in the width direction of one end to be assembled to the inclined groove jaw of the plate guide, and arc-shaped first and second ends formed with a predetermined curvature at the other end where the guide protrusions are formed. It is characterized in that it comprises a stepped portion and a plurality of adjusting bolt screw holes formed so that the adjusting bolt can be threaded through the jig body formed between the guide protrusion and the stepped portion.

The adjustment jig is formed at the end of the pipe and is provided with a plurality so as to maintain the flanges in an open state by placing a stepped portion between the flanges corresponding to each other during work, characterized in that they are assembled and installed symmetrically to the plate guide.

The adjustment jig is characterized in that the front side adjustment jig is screwed to the right-hand threaded portion of the adjustment bolt, and the rear side adjustment jig is screwed to the left-hand threaded portion of the adjustment bolt.

The adjustment bolts are screwed together by passing through adjustment bolt screw holes formed in a pair of adjustment jigs, and have a wrench head formed at one end so as to be able to use an operating tool, and a predetermined length from one end of the wrench head. It is characterized in that it comprises a right-hand screw part formed, an interruption chamber in which the screw is unprocessed at the other end of the right-hand screw part, and a left-hand screw part formed to a certain length from the other end of the interruption chamber.

The setting unit before and after the flange operation includes an alignment box screwed and installed at four places where alignment bolts intersect in the bolt frame unit, an alignment jig screwed and installed to upper and lower alignment bolts in the bolt frame unit, and the bolt frame unit It is characterized in that it is composed of tightening nuts screwed and installed to tighten the four alignment boxes and the alignment jig at the ends of the alignment bolts and on both sides of the upper and lower alignment jigs.

The alignment box is installed at four intersections of the alignment bolts formed by the bolt frame portion, and is drilled so that a box body formed in a rectangular parallelepiped shape and alignment bolts vertically disposed in two rows pass through the box body and are screwed together. It is characterized in that it comprises a plurality of box body bolt holes formed, and a box center bolt hole formed by drilling so that alignment bolts disposed horizontally in the middle of the longitudinal direction of the box body intersect with the box body bolt holes and are screwed through therethrough. to be

The alignment jig includes a jig body disposed on horizontally disposed alignment bolts, formed in a cube shape, and a jig body bolt hole formed by drilling through the center of the jig body so that the horizontally disposed alignment bolt penetrates and is screwed together. , It is characterized in that it is formed by forming a curved portion formed with a certain curvature so as to be in close contact with the outer peripheral surface of the flange on one side of the jig body so as to intersect the bolt hole of the jig body.

The tightening nuts are each fastened to the alignment bolts of the bolt frame, characterized in that it is possible to adjust the tightening or loosening of the four alignment boxes and the upper and lower alignment jigs.

According to the setting tool for maintenance, inspection and alignment of flanges according to the present invention, it is possible to easily withdraw and insert gaskets when replacing gaskets between flanges.

In addition, there is an effect of easily adjusting the gap between the flanges during a gasket replacement operation in which the gasket is drawn out and inserted between the flanges.

In addition, when assembling a gasket between flanges, there is an effect of accurately and conveniently aligning the flanges.

In addition, there is an effect of preventing leakage caused by damage to the flange surface during the existing gasket replacement work and misalignment during assembly.

In addition, there is an effect of minimizing damage to the flange surface and easily adjusting the degree of spacing between the flanges.

In addition, when aligning between flanges, there is an effect of using a setting tool to accurately perform the alignment without depending on the operator's experience.

In addition, there is an effect of reducing the time required for work preparation and work due to the simplification and miniaturization of the components constituting the setting tool.

In addition, the use of the setting tool prevents industrial safety accidents such as strictures and prevents damage to the flange surface, thereby enabling stable operation of the facility.

In addition, as the flange-related maintenance inspection alignment is accurately performed by using the setting tool, leakage is prevented, and consequently, manpower consumption and time loss are prevented.

In addition, as the maintenance inspection alignment between the flanges is accurately performed by the setting tool, there is an effect of improving the maintenance quality.

1 is a perspective view showing a setting tool for aligning flange maintenance inspection according to the present invention.
Figure 2 is a front view showing a setting tool for flange maintenance inspection alignment according to the present invention.
Figure 3 is a view showing a flange separation state with a setting tool for flange maintenance inspection alignment according to the present invention.
Figure 4 is a view showing the components of the setting tool for flange maintenance inspection alignment according to the present invention.

In order to fully understand the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the examples described in detail below. This embodiment is provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same members are sometimes indicated by the same reference numerals. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

Hereinafter, by describing a preferred embodiment of the present invention with reference to the accompanying drawings, a setting tool for maintenance, inspection and alignment of a flange according to the present invention will be described in detail.

As shown in FIGS. 1 to 4, the setting tool 2 for flange maintenance, inspection and alignment according to the present invention includes alignment bolts 12 arranged vertically in two rows on the left and right sides, and alignment bolts arranged horizontally on the upper and lower sides. a bolt frame portion 10 composed of (14); Left and right plate guides 32 freely inserted into each of the vertically arranged alignment bolts 12, and a pair of adjustment jigs 34 assembled and installed to be movable forward and backward on each of the plate guides 32, A flange adjustment unit 30 composed of a pair of adjustment bolts 36 screwed together to pass through the adjustment jig 34; In the bolt frame part 10, the four alignment boxes 52 freely inserted and installed in each of the four places where the alignment bolts 12 and 14 intersect, and the alignment bolts 14 disposed at the upper and lower portions move respectively. The alignment jig 54, which is freely inserted and installed, and a plurality of fasteners screwed and installed on both ends of the alignment bolts 12 and 14 and both sides of the alignment jig 54 in the bolt frame unit 10 It includes a setting unit 50 before and after the flange operation consisting of a nut 56.

In addition, the bolt frame portion 10 includes alignment bolts 12 vertically disposed on the left and right sides in two rows, alignment bolts 14 horizontally disposed on the upper and lower portions, and the alignment bolts 12 and 14 are disposed at the ends It is made to include an alignment box 52 that is assembled to cross each other in parts and is inserted and installed to be movable along the alignment bolts 12 and 14.

In addition, the flange adjustment unit 30 is assembled to be movably movable back and forth in each of the plate guides 32, which are movably inserted into and installed in each of the alignment bolts 12 arranged vertically side by side on the left and right sides, and the plate guides 32, respectively. It is composed of front and rear adjusting jigs 34 installed and a pair of adjusting bolts 36 screwed through the adjusting jigs 34, respectively.

In addition, as shown in FIGS. 1 and 4, the plate guide 32 has a width such that it can be inserted into the guide body 32a formed in a rectangular parallelepiped shape and the alignment bolts 12 vertically arranged in two rows. A plurality of bolt holes 32b formed to penetrate in a direction, a sliding surface 32c formed so that the adjustment jig 34 can slide forward and backward along one surface spaced apart from the bolt hole 32b, and the sliding surface 32c. It includes inclined grooves 32d formed on both sides of the sliding surface 32c in the longitudinal direction so as to be slidable along the surface 32c.

In addition, as shown in FIGS. 1 and 4, the adjustment jig 34 has guide protrusions protruding in a triangular shape at both ends in the width direction of one end so as to be assembled to the inclined groove jaw 32d of the plate guide 32. (34a), and a stepped portion (34b) formed of arc-shaped first and second steps, the tip of which is formed with a certain curvature at the other end where the guide protrusion (34a) is formed, and between the guide protrusion (34a) and the stepped portion (34b). It includes a plurality of adjustment bolt screw holes 34d formed so that the adjustment bolt 36 can be screwed into the jig body 34c formed on the body 34c.

In addition, the adjusting jig 34 is formed at the end of the pipe and is provided with a plurality of flanges F to maintain the flanges F in an open state by placing the stepped portion 34b between the matching flanges F during work, It is assembled and installed so as to be symmetrical to the plate guide 32.

In addition, the adjustment jig 34 is installed by screwing the front adjustment jig to the right screw part 36b of the adjustment bolt 36 and screwing the rear adjustment jig to the left screw part 36d of the adjustment bolt 36 do.

In addition, as shown in FIGS. 1 and 4, the adjustment bolts 36 are provided so as to be screwed together by passing through the adjustment bolt screw holes 34d formed in the pair of adjustment jigs 34, respectively. A wrench head 36a formed to be able to use a manipulation tool, a right-hand screw portion 36b formed to a certain length from one end of the wrench head 36a, and a screw at the other end of the right-hand screw portion 36b. It includes a non-processed intermittent chamber 36c and a left-hand threaded portion 36d formed to a certain length from the other end of the intermittent chamber 36c.

In addition, as shown in FIGS. 1 and 4, the setting unit 50 before and after the flange operation is screwed and installed at four places where the alignment bolts 12 and 14 intersect in the bolt frame unit 10. A box 52, an alignment jig 54 screwed and installed to the upper and lower alignment bolts 14 in the bolt frame portion 10, and the alignment bolts 12 and 14 in the bolt frame portion 10 It is composed of four alignment boxes 52 and tightening nuts 56 screwed and installed to tighten the alignment jig 54 at the ends of them and on both sides of the upper and lower alignment jig 54.

In addition, the alignment box 52 is installed at four intersections of the alignment bolts formed by the bolt frame portion 10, and includes a box body 52a formed in a rectangular parallelepiped shape, and the box body 52a in two A plurality of box body bolt holes 52b formed by drilling so that alignment bolts 12 arranged vertically in rows penetrate through and are screwed together, and the middle of the box body 52a in the longitudinal direction while intersecting the box body bolt holes 52b. It includes a box center bolt hole 52c formed by drilling so that the horizontally disposed alignment bolt 14 penetrates and is screwed.

In addition, the alignment jig 54 includes a jig body 54a disposed in a horizontally arranged alignment bolt 14, formed in a cube shape, and an alignment bolt horizontally arranged at the center of the jig body 54a. (14) can be in close contact with the outer circumferential surface of the flange (F) on one side of the jig body (54a) so as to intersect the jig body bolt hole (54b) formed by being drilled through and screwed together with the jig body bolt hole (54b). It is made by forming a curved portion (54c) formed with a certain curvature so as to be.

In addition, the tightening nuts 56 are fastened to the alignment bolts 12 and 14 of the bolt frame 10, respectively, to tighten or loosen the four alignment boxes 52 and the upper and lower alignment jigs 54. allow it to be regulated.

Hereinafter, examples of use of the present invention made as described above will be described in detail through the drawings.

First, in the case of replacing the gasket placed between the flanges,

A plurality of stepped portions 34b that are in symmetrical contact with each other between the flanges F are used until the stepped portion 34b formed in one or two steps on the adjustment jig 34 touches the outer circumferential surface of the flange F. and insert it. At this time, the pipe in which the flanges F are formed may be finely spaced apart using a chain block or the like.

When the stepped portion 34b of the adjustment jig 34 is accurately inserted between the flanges F and the surface of the stepped portion 34b comes into close contact with the outer circumferential surface of the flange F, adjustment of the adjustment jigs 34 Turn the adjusting bolt 36 screwed and installed through the bolt screw holes 34d forward using a tool such as a spanner.

Accordingly, as the adjustment bolt 36 rotates in the forward direction, the adjustment jig 34 fastened to the right-hand screw portion 36b moves from the plate guide 32 to the wrench head 36a along the inclined groove shoulder 32d. And the adjustment jig 34 fastened to the left screw part 36d moves in the opposite direction. That is, when the adjustment bolt 36 is turned forward, the distance between the adjustment jigs 34 is widened, and when the adjustment bolt 36 is turned in the reverse direction, the distance between the adjustment jigs 34 is narrowed.

As described above, when the adjusting bolt 36 is turned in the forward direction, the adjusting jigs 34 can spread between the flanges F as much as the operator wants.

As described above, the work can be performed while the setting tool 2 for flange maintenance, inspection and alignment is installed. When the flanges F are caught by the step portions 34b of the adjustment jig 34 and the gap is widened, the existing gasket between the flanges F is replaced with a new gasket to eliminate the cause of leakage.

When the replacement of the gasket or the maintenance check of the flange F is completed, an alignment jig 54 is installed up and down at a position 90 degrees from the adjustment jig 34 to align the flanges F.

In order to install the adjustment jig 34 and the alignment jig 54, first, the adjustment jig 34 is assembled to the plate guide 32 using the inclined groove jaw 32d, and the bolt hole of the plate guide 32 Alignment bolts 12 are inserted through (32b).

Then, the alignment box 52 is inserted into both sides of the alignment bolts 12 using the bolt holes 52b of the box body.

Next, after fastening the tightening nuts 56 on both sides with the alignment jig 54 inserted in the center of the alignment bolts 14, the alignment box with the alignment bolts 14 inserted into the alignment bolts 12 ( It is inserted into the box center bolt hole 52c of 52) to assemble the alignment bolts 12 and 14 to intersect, and then tighten the tightening nuts 56 at both ends to prevent separation from the alignment box 52.

When the setting tool 2 for flange maintenance, inspection, and alignment is assembled and installed so that the flange F is centered and positioned around the flange, the positions of the alignment boxes 52 are finely adjusted by tightening the tightening nuts 56. Accordingly, when the adjustment jigs 34 and the alignment jigs 54 are tightened and adjusted until they come into close contact with the outer circumferential surface of the flange F evenly, the flanges F are aligned.

Then, when the flanges (F) are aligned, the bolts for fastening the flange are inserted into the bolt holes formed in the flange (F), and the adjustment jig 34 is drawn out between the flanges (F) to separate all the bolts for fastening the flange. contract Accordingly, the fastening of the flanges F is completed in an aligned state. As described above, when the fastening of the bolts for fastening the flange is completed, the alignment jig 54 located on the upper and lower parts of the flange (F) is also separated from the flange (F), and then the setting tool (2) for flange maintenance inspection and alignment is separated and Disassembly completes the work related to the flange.

The embodiment of the setting tool for maintenance, inspection and alignment of the flange of the present invention described above is only exemplary, and those skilled in the art to which the present invention belongs can make various modifications and other equivalent embodiments. You will get a good idea of the point. Therefore, it will be well understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents and alternatives within the spirit and scope of the present invention as defined by the appended claims.

2: Setting tool for flange maintenance check alignment
10: bolt frame part 12, 14: bolt
30: flange adjusting part 32: plate guide
32a: guide body 32b: bolt hole
32c: sliding surface 32d: inclined groove jaw
34: adjustment jig 34a: guide protrusion
34b: stepped portion 34c: jig body
34d: adjusting bolt screw hole 36: adjusting bolt
36a: head for wrench 36b: right-hand thread
36c: intermittent chamber 36d: left screw
50: setting part before and after flange work 52: alignment box
52a: box body 52b: box body bolt hole
52c: box center bolt hole 54: alignment jig
54a: jig body 54b: jig body bolt hole
54c: curved portion 56: tightening nut
F: Flange

Claims (12)

Formed in a square shape by assembling the vertically arranged alignment bolts 12 and the horizontally arranged alignment bolts 14, the alignment bolts 12 arranged vertically in two rows using a plurality of alignment boxes 52 And, a bolt frame portion 10 formed by assembling alignment bolts 14 arranged horizontally in one row to cross each other through screw coupling;
Plate guides 32 assembled and installed on the left and right alignment bolts 12 of the bolt frame part 10 by screwing, respectively, and a pair of adjusting bolts 36 on one side of the plate guide 32 are rotated. A pair of adjustment jigs 34 assembled so as to be slid open or narrowed when the flange adjustment unit 30 is configured to adjust the opening and alignment of the pipe flange;
The ends of the alignment bolts 12 and 14 are assembled into a plurality of alignment boxes 52 to which the alignment bolts 12 and 14 are screwed together, and left and right on the alignment bolts 14 arranged at the top and bottom of the bolt frame portion 10 formed crosswise. The alignment jig 54 assembled and installed by screw coupling to be movable, the alignment box 52 assembled at the ends of the alignment bolts 12 and 14, and the alignment jig 54 assembled only to the alignment bolts 14 It is characterized in that it comprises a setting unit 50 before and after the flange operation, which is configured to tightly fix the ) with the tightening nuts 56 Setting tool for flange maintenance check alignment. delete According to claim 1,
The plate guide 32,
A guide body 32a formed in a rectangular parallelepiped shape and movably inserted into each of the alignment bolts 12 arranged vertically side by side on the left and right sides;
A plurality of bolt holes 32b formed penetrating in the width direction so as to be inserted into the alignment bolts 12 vertically arranged in two rows;
A sliding surface 32c formed so that the adjusting jig 34 can slide forward and backward along one side surface spaced apart from the bolt hole 32b;
A setting tool for maintenance, inspection, and alignment of a flange, characterized in that it comprises inclined groove jaws (32d) formed on both sides of the sliding surface (32c) in the longitudinal direction so as to be able to slide along the sliding surface (32c). delete delete According to claim 1,
The adjustment jig 34,
Guide protrusions 34a protruding in a triangular shape from both ends in the width direction of one end so as to be assembled to the inclined groove jaw 32d of the plate guide 32, respectively, to be assembled and installed on each of the plate guides 32;
A stepped portion 34b formed of one and two arc-shaped steps with a tip having a predetermined curvature at the other end where the guide protrusion 34a is formed;
It comprises a plurality of adjusting bolt screw holes 34d formed so that the adjusting bolt 36 can be screwed into the jig body 34c formed between the guide protrusion 34a and the stepped portion 34b. Features a setting tool for flange maintenance check alignment. According to claim 1,
The adjustment bolt 36,
Assembled in a symmetrical structure to the plate guide 32 so that the widened state between the flanges (F) can be maintained by using the stepped portion (34b) formed to be forcibly inserted between the flanges (F) formed to correspond to the end of the pipe during work. A plurality of pieces are assembled and installed through screw coupling through each of the plurality of adjustment jigs 34 to be installed,
The right screw portion 36b formed on the adjustment bolt 36 is assembled and installed to be screwed to the left adjustment jig 34,
The left screw part (36d) formed on the adjustment bolt (36) is assembled and installed so as to be screwed to the right adjustment jig (34). According to claim 1,
The adjustment bolt 36,
It is provided to be screwed through each of the adjustment bolt screw holes 34d formed in the pair of adjustment jigs 34,
A wrench head 36a formed at one end so that a manipulation tool can be used;
A right-hand screw portion 36b formed to a certain length from one end of the wrench head 36a;
An intermittent chamber 36c in which a screw is unprocessed at the other end of the right-hand threaded portion 36b,
A setting tool for flange maintenance inspection alignment, characterized in that it comprises a left screw portion (36d) formed to a certain length from the other end of the intermittent chamber (36c). According to claim 1,
The setting unit 50 before and after the flange operation,
In the bolt frame part 10, the alignment bolts 12 and 14 are screwed and installed at four places where they intersect, and a box body 52a formed in a rectangular parallelepiped shape and the box body 52a are vertically arranged in two rows. A plurality of box body bolt holes 52b formed by being drilled so that the aligned bolts 12 penetrate and are screwed, and the middle of the box body 52a in the longitudinal direction is horizontally disposed while intersecting the box body bolt holes 52b. An alignment box 52 formed by forming a box center bolt hole 52c through which the aligned bolt 14 penetrates and is screwed;
In the bolt frame part 10, the jig body 54a is installed by being screwed to the alignment bolts 14 arranged horizontally on the upper and lower sides, and the jig body 54a is formed in the shape of a cube, and the center of the jig body 54a is horizontally disposed. The jig body bolt hole 54b formed by being drilled so that the alignment bolt 14 penetrates and is screwed, and the outer circumferential surface of the flange F on one side of the jig body 54a so as to intersect the jig body bolt hole 54b. An alignment jig 54 that forms a curved surface portion 54c formed with a certain curvature so as to be in close contact, and an alignment jig at the ends and upper and lower portions of the alignment bolts 12 and 14 in the bolt frame portion 10 ( 54) It is screwed and installed so that the four alignment boxes 52 and the alignment jig 54 can be tightened on both sides, by being fastened to the alignment bolts 12 and 14 of the bolt frame 10, respectively, the four alignment boxes (52) and a tightening nut (56) to adjust the tightening or loosening of the upper and lower alignment jigs (54).
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