Expansion joint device and method for assembling expansion joint device

Abstract

To absorb axial and radial deviations between a first pipe conduit flange and a second pipe conduit flange.SOLUTION: A telescopic joint device 10 comprises a first joint pipe 11 and a second joint pipe 21. The second joint pipe 21 has a second joint pipe body 22 and an eccentric flange 23. An alignment flange 30 in which a plurality of bolt holes 35 is eccentrically formed on an outer periphery of the eccentric flange 23 is provided so as to be slidable in a rotational direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an expansion joint device that connects a first pipeline flange and a second pipeline flange, and a method for assembling an expansion joint device, and in particular to an expansion joint device and a method for assembling an expansion joint device that reliably absorbs axial and radial misalignment between the first pipeline flange and the second pipeline flange. [Background technology]

[0002] BACKGROUND ART Expansion joint devices that connect a first pipeline flange and a second pipeline flange have been known in the past.

[0003] The first pipeline flange and the second pipeline flange are provided, for example, at the end of an existing pipe or at the end of a pump or a valve, and the expansion joint device is used to connect pipes to each other, or to connect a pipe to a pump or a valve.

[0004] Conventionally, in order to connect existing pipes to each other, or to a pump or a valve, an expansion joint device has been attached between a first pipe flange and a second pipe flange provided at the ends of the pipes, or at the ends of the pipes and the pump or valve.

[0005] However, no expansion joint device has been developed that can reliably absorb axial and radial misalignment that occurs between the first and second pipe flanges. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 3-285137 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-91215 [Patent Document 3] Japanese Patent Application Laid-Open No. 2004-53317 [Patent Document 4] Japanese Patent Application Laid-Open No. 2004-10355 Summary of the Invention [Problem to be solved by the invention]

[0007] The present disclosure has been made in consideration of these points, and aims to provide an expansion joint device that can absorb the axial and radial misalignment that occurs between the first pipeline flange and the second pipeline flange, thereby reliably connecting the first pipeline and the second pipeline. [Means for solving the problem]

[0008] The present disclosure relates to an expansion joint device connecting a first conduit flange and a second conduit flange, the expansion joint device comprising: a first joint pipe having a fixed flange connected to the first conduit flange and a first joint pipe body; an eccentric flange connected to the second conduit flange and including an eccentric outer peripheral surface; and a second joint pipe body, the second joint pipe being axially slidably attached to the first joint pipe; and a disk-shaped aligning flange attached circumferentially to the eccentric outer peripheral surface of the eccentric flange, the aligning flange having an abutment inner peripheral surface that abuts the eccentric outer peripheral surface and being connected to the second conduit flange, the aligning flange having a plurality of bolt holes formed eccentrically with respect to the abutment inner peripheral surface, the aligning flange being slidable in the circumferential direction on the eccentric outer peripheral surface of the eccentric flange, and the aligning flange being slidable in the circumferential direction on the eccentric outer peripheral surface of the eccentric flange, the aligning flange having a plurality of bolt holes formed in the aligning flange that are eccentric with respect to the abutment inner peripheral surface, and the aligning flange being slidable in the circumferential direction on the eccentric outer peripheral surface of the eccentric flange, thereby moving the centers of the plurality of bolt holes in the aligning flange toward and away from the center of the second joint pipe body of the second joint pipe.

[0009] The present disclosure provides an expansion joint device in which, when the eccentric direction of the plurality of bolt holes of the aligning flange relative to the abutment inner peripheral surface and the eccentric direction of the eccentric outer peripheral surface of the eccentric flange relative to the second joint piping body are oriented in opposite directions, the centers of the plurality of bolt holes of the aligning flange coincide with the center of the second joint piping body of the second joint piping.

[0010] The present disclosure provides an expansion joint device in which, when the eccentric direction of the plurality of bolt holes of the aligning flange relative to the abutment inner peripheral surface and the eccentric direction of the eccentric outer peripheral surface of the eccentric flange relative to the second joint piping body are oriented in the same direction, the centers of the plurality of bolt holes of the aligning flange are farthest from the center of the second joint piping body of the second joint piping.

[0011] The present disclosure is an expansion joint device in which the first joint piping body is axially slidably attached to the outer surface of the second joint piping body, and a gasket is interposed between the first joint piping body and the second joint piping body.

[0012] The present disclosure is an expansion joint device, wherein the first joint piping body or the second joint piping body is provided with a packing retaining portion that retains the packing.

[0013] The present disclosure is an expansion joint device, wherein the aligning flange has an eccentric outer peripheral surface that is eccentric with respect to the abutment inner peripheral surface, and the centers of the plurality of bolt holes of the aligning flange coincide with the center of the eccentric outer peripheral surface of the aligning flange.

[0014] The present disclosure is an expansion joint device, wherein the aligning flange is provided adjacent to the abutment inner circumferential surface and has a retaining portion that retains the eccentric flange between the eccentric flange and the second pipeline flange.

[0015] The present disclosure provides a method for assembling the expansion joint device described above, comprising the steps of: determining the amount of radial deviation between the center of the first conduit flange and the center of the second conduit flange; sliding the aligning flange circumferentially on the eccentric outer peripheral surface of the eccentric flange based on the amount of radial deviation between the center of the first conduit flange and the center of the second conduit flange to determine the distance between the centers of multiple bolt holes in the aligning flange and the center of the second joint piping body of the second joint piping; inserting the expansion joint device into the first conduit flange and the second conduit flange; and connecting the fixed flange to the first conduit flange and connecting the eccentric flange and the aligning flange to the second conduit flange. [Effects of the Invention]

[0016] As described above, according to the present disclosure, it is possible to reliably absorb the amount of misalignment in the axial direction and the radial direction that occurs between the first conduit flange and the second conduit flange. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a cross-sectional view showing an embodiment of an expansion joint device. [Figure 2] Figure 2 is a schematic cross-sectional view of Figure 1. [Figure 3] Figure 3 is a partially cutaway side view of the expansion joint device. [Figure 4] Figure 4 is a view taken along line IV in Figure 3. [Figure 5] FIG. 5 is a cross-sectional view showing an expansion joint device. [Figure 6] FIG. 6 is a schematic cross-sectional view of FIG. [Figure 7] FIG. 7 is a front view showing the eccentric flange and the aligning flange of the second joint piping when the radial adjustment amount is 0. [Figure 8] FIG. 8 is a front view showing the eccentric flange and the aligning flange of the second joint piping when the radial adjustment amount is maximum. [Figure 9] FIG. 9 is a flowchart showing a method for assembling an expansion joint device. DETAILED DESCRIPTION OF THE INVENTION

[0018] <Embodiments of the present invention> Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0019] 1 to 9 are diagrams showing an embodiment of the present disclosure.

[0020] 1 is a cross-sectional view of the expansion joint device, FIG. 2 is a schematic cross-sectional view of FIG. 1, FIG. 3 is a partially broken side view, FIG. 4 is a view taken along line IV in FIG. 3, FIG. 5 is a cross-sectional view of the expansion joint device, FIG. 6 is a schematic cross-sectional view of FIG. 5, FIGS. 7 and 8 are front views showing the eccentric flange and aligning flange, and FIG. 9 is a flowchart showing a method of assembling the expansion joint device.

[0021] As shown in FIGS. 1 to 4, an expansion joint device 10 according to the present disclosure connects a first pipe flange 1A of a first pipe 1 and a second pipe flange 2A of a second pipe 2.

[0022] In this embodiment, the first pipe 1 and the second pipe 2 are existing pipes, and there are usually deviations between them in the axial and radial directions from the standard design values. The expansion joint device 10 according to this embodiment absorbs the axial and radial deviations between the first pipe flange 1A of the first pipe 1 and the second pipe flange 2A of the second pipe 2, thereby reliably connecting the first pipe flange 1A and the second pipe flange 2A.

[0023] Although the first conduit flange 1A and the second conduit flange 2A are both fixed to the ends of the first pipe 1 and the second pipe 2, the first conduit flange 1A and the second conduit flange 2A are not necessarily fixed to the ends of the first pipe 1 and the second pipe 2. For example, the first conduit flange 1A fixed to the first pipe 1 and the second conduit flange 2A provided on the pump may be connected by an expansion joint device 10. The first conduit flange 1A fixed to the first pipe 1 and the second conduit flange 2A provided on the valve may also be connected by an expansion joint device 10. The first conduit flange 1A provided on the pump and the second conduit flange 2A provided on the valve may also be connected by an expansion joint device 10.

[0024] Such an expansion joint device 10 includes a first joint pipe 11 having a fixed flange 13 connected to a first pipeline flange 1A and a first joint pipe body 12, an eccentric flange 23 connected to a second pipeline flange 2A and a second joint pipe 21 having a second joint pipe body 22, and a disk-shaped aligning flange 30 attached to the outer periphery of the eccentric flange 23.

[0025] Of these, first joint pipe body 12 of first joint pipe 11 is formed of a cylindrical body, and fixing flange 13 is disk-shaped. Fixing flange 13 is brought into contact with first conduit flange 1A. Fixing flange 13 and first conduit flange 1A are connected to each other by inserting fastening bolts 4 into bolt holes 13a of fixing flange 13 and bolt holes 1a of first conduit flange 1A, and tightening fastening bolts 4 with fastening nuts 5.

[0026] The second joint pipe body 22 of the second joint pipe 21 is made of a cylindrical body, and the eccentric flange 23 has an eccentric outer peripheral surface 25 that is eccentric with respect to the center C1 of the second joint pipe body 22.

[0027] That is, in Figures 1, 5 and 7 to 8, the center C1 of the second joint piping body 22 is shown, and the eccentric outer peripheral surface 25 of the eccentric flange 23 has a circular shape that is slightly eccentric from the center C1 of the second joint piping body 22, and the center of the eccentric outer peripheral surface 25 is shown as C2.

[0028] As described above, aligning flange 30 is disk-shaped and attached to the outer periphery of eccentric flange 23. Aligning flange 30 has an abutting inner circumferential surface 31 that abuts against circular eccentric outer circumferential surface 25 of eccentric flange 23, and an eccentric outer circumferential surface 32 that is eccentric relative to abutting inner circumferential surface 31.

[0029] The aligning flange 30 also has a retaining portion 33 provided adjacent to the abutting inner peripheral surface 31 in the axial direction, and this retaining portion 33 clamps the eccentric flange 23 of the second joint pipe 21 between itself and the second pipe flange 2A.

[0030] Next, the aligning flange 30 will be further described.

[0031] As described above, the aligning flange 30 has an abutting inner peripheral surface 31 that abuts against the circular eccentric outer peripheral surface 25 of the eccentric flange 23. This abutting inner peripheral surface 31 abuts against the eccentric outer peripheral surface 25 of the eccentric flange 23 and slides in the circumferential direction, and has the same center C2 as the eccentric outer peripheral surface 25 of the eccentric flange 23 and is circular in shape.

[0032] The eccentric outer peripheral surface 32 of the aligning flange 30 is eccentric with respect to the abutting inner peripheral surface 31, has a center C3 different from the center C2 of the abutting inner peripheral surface 31, and is circular.

[0033] Furthermore, the aligning flange 30 is provided with a plurality of, for example, 16 bolt holes 35 for connection to the second conduit flange 2A, as will be described later. Fastening bolts 6 are inserted into each of the bolt holes 35 and the bolt holes 2a of the second conduit flange 2A, and the fastening bolts 6 are tightened with fastening nuts 7, thereby connecting the aligning flange 30 to the second conduit flange 2A.

[0034] In this embodiment, the plurality of bolt holes 35 are arranged in a circle along the circumferential direction of the aligning flange 30, and the plurality of bolt holes 35 are provided coaxially with the eccentric outer peripheral surface 32 of the aligning flange 30. Therefore, the plurality of bolt holes 35 share the same center C3 as the eccentric outer peripheral surface 32, and the center C3 of the bolt holes 35 is different from the center C2 of the abutting inner peripheral surface 31. In this way, the eccentric outer peripheral surface 32 of the aligning flange 30 and the plurality of bolt holes 35 are eccentric with respect to the abutting inner peripheral surface 31.

[0035] In this embodiment, the relationship between the center C1 of the second joint pipe body 22 of the second joint pipe 21, the center C2 of the abutting inner peripheral surface 31 of the aligning flange 30, and the centers C3 of the eccentric outer peripheral surface 32 and the plurality of bolt holes 35 of the aligning flange 30 is as follows: Distance t1 between C2 and C1 = Distance t2 between C3 and C2 It is as follows.

[0036] The first joint pipe body 12 of the first joint pipe 11 is located outside the second joint pipe body 22 of the second joint pipe 21, and the first joint pipe body 12 is able to slide in the axial direction on the outer surface of the second joint pipe body 22.

[0037] In addition, a gasket 17 extending in the circumferential direction is interposed between the end of the first joint piping body 12 and the outer surface of the second joint piping body 22, and this gasket 17 is held in place by a fixing portion 16 provided at the end of the first joint piping body 12 on the second pipeline flange 2A side and a retainer 18 attached to the fixing portion 16 by an attachment bolt 19.

[0038] The first joint pipe body 12 is movable along the axial direction on the outer surface of the second joint pipe body 22 .

[0039] Therefore, when the distance between the first pipeline flange 1A and the second pipeline flange 2A increases or decreases compared to the design value, the first joint pipe body 12 of the first joint pipe 11 can be moved axially along the outer surface of the second joint pipe body 22 of the second joint pipe 21, thereby ensuring a more reliable connection between the first pipeline flange 1A and the second pipeline flange 2A using the expansion joint device 10.

[0040] In addition, an example has been shown in which the first joint pipe body 12 of the first joint pipe 11 is located outside the second joint pipe body 22 of the second joint pipe 21, and the first joint pipe body 12 is able to slide in the axial direction on the outer surface of the second joint pipe body 22, but this is not limited to this, and the first joint pipe body 12 of the first joint pipe 11 may be located inside the second joint pipe body 22 of the second joint pipe 21, and the first joint pipe body 12 may be able to slide in the axial direction on the inner surface of the second joint pipe body 22.

[0041] In this case, a packing 17 extending in the circumferential direction is interposed between the end of the second joint piping body 22 and the outer surface of the first joint piping body 12. The packing 17 is held in place by a fixing portion 16 provided at the end of the second joint piping body 22 on the side of the first conduit flange 1A, and a retainer 18 attached to the fixing portion 16 with a mounting bolt 19.

[0042] Next, the operation of this embodiment configured as described above will be explained below with reference to the flowchart shown in FIG.

[0043] First, the amount of radial deviation between the center of the first conduit flange 1A and the center of the second conduit flange 2A is determined.

[0044] Next, at a factory or on-site, based on the radial offset between the center of the first pipeline flange 1A and the center of the second pipeline flange 2A, the aligning flange 30 is slid circumferentially on the eccentric flange 23 of the second joint pipe 21, and the distance between the center C3 of the multiple bolt holes 35 and the center C1 of the second joint pipe body 22 of the second joint pipe 21 is determined so as to match the radial offset between the center of the first pipeline flange 1A and the center of the second pipeline flange 2A.

[0045] Next, a method for determining the distance between the center C3 of the plurality of bolt holes 35 and the center C1 of the second joint pipe body 22 of the second joint pipe 21 will be described below.

[0046] First, referring to Figures 1 and 2, we will explain the case where the center C3 of the multiple bolt holes 35 is the same as the center C1 of the second joint piping body 22 of the second joint piping 21, i.e., the case where the radial adjustment amount by the expansion joint device 10 is 0.

[0047] As shown in FIGS. 1 and 2, the center C2 of the eccentric outer peripheral surface 25 of the eccentric flange 23 and the abutting inner peripheral surface 31 of the aligning flange 30 is shifted radially upward by a distance t1 relative to the center C1 of the second joint piping body 22.

[0048] At this time, the height Hs of the eccentric flange 23 is maximum at the upper part of the expansion joint device 10 shown in FIG. 1, and the height Hs of the eccentric flange 23 is minimum at the lower part of the expansion joint device 10.

[0049] As shown in FIGS. 1 and 2, the centers C3 of the bolt holes 35 and the eccentric outer peripheral surface 32 of the aligning flange 30 are offset radially downward by a distance t2 from the centers C2 of the abutting inner peripheral surface 31 of the aligning flange 30 and the eccentric outer peripheral surface 25 of the eccentric flange 23.

[0050] At this time, the length Hf between the abutting inner peripheral surface 31 and the eccentric outer peripheral surface 32 of the aligning flange 30 is minimum in the upper part of the expansion joint device 10, and the length Hf between the abutting inner peripheral surface 31 and the eccentric outer peripheral surface 32 of the aligning flange 30 is maximum in the lower part of the expansion joint device 10.

[0051] As described above, the distance t1 between C2 and C1 is the same as the distance t2 between C3 and C2.

[0052] As a result, the centers C2 of the eccentric outer peripheral surface 25 of the eccentric flange 23 and the abutting inner peripheral surface 31 of the aligning flange 30 are shifted radially upward by a distance t1 from the center C1 of the second joint piping main body 22, and the centers C3 of the multiple bolt holes 35 and the eccentric outer peripheral surface 32 of the aligning flange 30 are shifted radially downward by a distance t2 from the centers C2 of the abutting inner peripheral surface 31 of the aligning flange 30 and the eccentric outer peripheral surface 25 of the eccentric flange 23. As a result, the centers C3 of the bolt holes 35 ultimately coincide with the center C1 of the second joint piping main body 22. In other words, the radial adjustment amount of the expansion joint device 10 becomes 0 (see FIGS. 1, 2, and 7).

[0053] Next, with reference to Figures 5 and 6, we will explain the case where the distance between the center C1 of the second joint piping body 22 of the second joint piping 21 and the center C3 of the multiple bolt holes 35 is maximum, i.e., the case where the radial adjustment amount is maximized by the expansion joint device 10.

[0054] As shown in Figures 5 and 6, the center C2 of the eccentric outer peripheral surface 25 of the eccentric flange 23 and the abutting inner peripheral surface 31 of the aligning flange 30 is shifted radially downward by a distance t1 relative to the center C1 of the second joint piping body 22.

[0055] At this time, the height Hs of the eccentric flange 23 is minimum at the upper part of the expansion joint device 10 shown in FIG. 5, and the height Hs of the eccentric flange 23 is maximum at the lower part of the expansion joint device 10.

[0056] As shown in FIGS. 1 and 2, the centers C3 of the bolt holes 35 and the eccentric outer peripheral surface 32 of the aligning flange 30 are offset radially downward by a distance t2 from the centers C2 of the abutting inner peripheral surface 31 of the aligning flange 30 and the eccentric outer peripheral surface 25 of the eccentric flange 23.

[0057] At this time, the length Hf between the abutting inner peripheral surface 31 and the eccentric outer peripheral surface 32 of the aligning flange 30 is minimum in the upper part of the expansion joint device 10, and the length Hf between the abutting inner peripheral surface 31 and the eccentric outer peripheral surface 32 of the aligning flange 30 is maximum in the lower part of the expansion joint device 10.

[0058] As described above, the distance t1 between C2 and C1 is the same as the distance t2 between C3 and C2.

[0059] As a result, the centers C2 of the eccentric outer peripheral surface 25 of the eccentric flange 23 and the abutting inner peripheral surface 31 of the aligning flange 30 are displaced radially downward by a distance t1 from the center C1 of the second joint piping main body 22, and the centers C3 of the multiple bolt holes 35 and the eccentric outer peripheral surface 32 of the aligning flange 30 are similarly displaced radially downward by a distance t2 from the centers C2 of the abutting inner peripheral surface 31 of the aligning flange 30 and the eccentric outer peripheral surface 25 of the eccentric flange 23. As a result, the centers C3 of the bolt holes 35 are ultimately displaced by t1 + t2 from the center C1 of the second joint piping main body 22. In other words, the radial adjustment amount of the expansion joint device 10 becomes the maximum value of t1 + t2 (see FIGS. 5, 6, and 8).

[0060] In this way, the aligning flange 30 is slid circumferentially on the eccentric flange 23 of the second joint pipe 21 to determine the distance between the center C3 of the multiple bolt holes 35 and the center C1 of the second joint pipe body 22 of the second joint pipe 21.

[0061] In this case, the first joint pipe body 12 of the first joint pipe 11 slides in advance on the outer surface of the second joint pipe body 22 of the second joint pipe 21, and the expansion joint device 10 is in a contracted state along the axial direction.

[0062] Next, the expansion joint device 10 in an axially contracted state is inserted between the first conduit flange 1A and the second conduit flange 2A. In this case, the direction of deviation between the center C3 of the plurality of bolt holes 35 and the center C1 of the second joint piping body 22 of the second joint piping 21 is aligned with the direction of deviation between the center of the first conduit flange 1A and the center of the second conduit flange 2A.

[0063] Thereafter, the first joint pipe body 12 of the first joint pipe 11 is slid on the outer surface of the second joint pipe body 22 of the second joint pipe 21, and the expansion joint device 10 is stretched along the axial direction.

[0064] Thereafter, fastening bolts 4 are inserted into bolt holes 13a of the fixing flange 13 and bolt holes 1a of the first pipeline flange 1A, and the fastening bolts 4 are tightened with fastening nuts 5 to connect the first pipeline flange 1A and the fixing flange 13.

[0065] Similarly, the eccentric flange 23 and aligning flange 30 of the second joint piping 21 are brought into contact with the second conduit flange 2A, and fastening bolts 6 are inserted into the bolt holes 35 of the aligning flange 30 and the bolt holes 2a of the second conduit flange 2A, and the fastening bolts 6 are tightened with the fastening nuts 7. This completes the connection between the second conduit flange 2A and the aligning flange 30. In this case, the eccentric flange 23 of the second joint piping 21 is clamped and held between the holding portion 33 of the aligning flange 30 and the second conduit flange 2A.

[0066] As described above, according to this embodiment, the radial offset between the center of the first conduit flange 1A and the center of the second conduit flange 2A is determined in advance. Next, at a factory or on-site, based on the radial offset between the center of the first conduit flange 1A and the center of the second conduit flange 2A, the aligning flange 30 is slid circumferentially on the eccentric flange 23 of the second joint piping 21 so that the distance between the center C3 of the plurality of bolt holes 35 and the center C1 of the second joint piping body 22 of the second joint piping 21 matches the offset between the center of the first conduit flange 1A and the center of the second conduit flange 2A. Thereafter, the fixed flange 13 of the first joint piping 11 is connected to the first conduit flange 1A, and the eccentric flange 23 and the aligning flange 30 are connected to the second conduit flange 2A.

[0067] Thus, according to this embodiment, even if an axial misalignment occurs between the first conduit flange 1A and the second conduit flange 2A, the expansion joint device 10 can absorb the axial misalignment by sliding the first joint piping body 12 of the first joint piping 11 along the axial direction on the outer surface of the second joint piping body 22 of the second joint piping 21.

[0068] Furthermore, even if a radial misalignment occurs between the first conduit flange 1A and the second conduit flange 2A, the aligning flange 30 slides circumferentially on the eccentric flange 23 of the second joint piping 21 to adjust the distance between the center C3 of the plurality of bolt holes 35 and the second joint piping main body C1 of the second joint piping 21. This allows the expansion joint device 10 to absorb the radial misalignment. [Explanation of symbols]

[0069] 1. First piping 1A First pipe flange 2. Second piping 2A Second pipe flange 4 Fastening bolts 5 Fastening nut 6 Fastening bolts 7 Fastening nut 10 Expansion joint device 11 First joint piping 12 First joint piping body 13 Fixed flange 16 Fixed part 17 Packing 18 Holder 19 Mounting bolt 21 Second joint piping 22 Second joint piping body 23 Eccentric flange 25 Eccentric outer circumferential surface 30 Aligning flange 31 Contact inner peripheral surface 32 Eccentric outer circumferential surface 35 bolt holes C1 center C2 center C3 center

Claims

1. An expansion joint device that connects a first pipeline flange and a second pipeline flange, a first joint pipe having a fixing flange connected to the first pipe flange and a first joint pipe body; a second joint pipe having an eccentric flange connected to the second pipeline flange and including an eccentric outer peripheral surface, and a second joint pipe body, the second joint pipe being slidably attached to the first joint pipe in an axial direction; a disk-shaped aligning flange attached to the eccentric outer peripheral surface of the eccentric flange so as to be slidable along the circumferential direction, the aligning flange has an inner peripheral surface that abuts against the eccentric outer peripheral surface, and is connected to the second pipe flange; an expansion joint device in which a plurality of bolt holes are formed in the aligning flange eccentrically with respect to the abutment inner peripheral surface, and the aligning flange is caused to slide circumferentially on the eccentric outer peripheral surface of the eccentric flange, thereby bringing the centers of the plurality of bolt holes in the aligning flange into contact with and away from the center of the second joint piping main body of the second joint piping.

2. 2. The expansion joint device according to claim 1, wherein when the eccentric direction of the plurality of bolt holes in the aligning flange relative to the abutment inner peripheral surface and the eccentric direction of the eccentric outer peripheral surface of the eccentric flange relative to the second joint piping body are oriented in opposite directions, centers of the plurality of bolt holes in the aligning flange coincide with a center of the second joint piping body of the second joint piping.

3. 3. The expansion joint device according to claim 1, wherein when an eccentric direction of the plurality of bolt holes in the aligning flange relative to the abutment inner peripheral surface and an eccentric direction of the eccentric outer peripheral surface of the eccentric flange relative to the second joint piping body are oriented in the same direction, centers of the plurality of bolt holes in the aligning flange are farthest from a center of the second joint piping body of the second joint piping.

4. 2. The expansion joint device according to claim 1, wherein the first joint piping body is attached to an outer surface of the second joint piping body so as to be slidable in an axial direction, and a packing is interposed between the first joint piping body and the second joint piping body.

5. The expansion joint device according to claim 4, wherein the first joint piping body or the second joint piping body is provided with a packing retaining portion that retains the packing.

6. 2. The expansion joint device according to claim 1, wherein the aligning flange has an eccentric outer peripheral surface that is eccentric relative to the abutting inner peripheral surface, and wherein centers of the plurality of bolt holes in the aligning flange coincide with centers of the eccentric outer peripheral surface of the aligning flange.

7. 2. The expansion joint device according to claim 1, wherein the aligning flange has a holding portion provided adjacent to the abutting inner circumferential surface and holding the eccentric flange between the eccentric flange and the second pipeline flange.

8. The method for assembling an expansion joint device according to claim 1, determining a radial offset between a center of the first conduit flange and a center of the second conduit flange; a step of sliding the aligning flange along a circumferential direction on the eccentric outer peripheral surface of the eccentric flange based on a radial deviation between a center of the first conduit flange and a center of the second conduit flange, thereby determining a distance between the centers of a plurality of bolt holes of the aligning flange and a center of the second joint piping body of the second joint piping; inserting the expansion joint device into the first pipeline flange and the second pipeline flange; connecting the fixed flange to the first pipeline flange, and connecting the eccentric flange and the aligning flange to the second pipeline flange.

Images