Expansion joint device and method for assembling expansion joint device

Abstract

[Problem] To absorb misalignment between a first pipeline flange and a second pipeline flange in the axial direction and radial direction. [Solution] This expansion joint device 10 includes 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 aligning flange 30 in which a plurality of bolt holes 35 are formed eccentrically on the outer periphery of the eccentric flange 23 is provided in a slidable manner in the rotating direction.

Description

Expansion joint device and method for assembling expansion joint device

[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 the expansion joint device, and in particular to an expansion joint device and a method for assembling the expansion joint device that reliably absorbs axial and radial misalignment between the first pipeline flange and the second pipeline flange.

[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 a pipe and 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.

[0006] Japanese Patent Laid-Open No. 3-285137 Japanese Patent Laid-Open No. 2005-91215 Japanese Patent Laid-Open No. 2004-53317 Japanese Patent Laid-Open No. 2004-10355

[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.

[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, the expansion joint device

[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 relates to 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 relates to 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 relates to an expansion joint device, in which a packing retaining portion that retains the packing is provided in the first joint piping body or the second joint piping body.

[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 relates to 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 relates to an expansion joint device, wherein the first joint piping body has a first joining flange, the second joint piping body is connected to the first joining flange via a second joining flange joined to the first joining flange, the first joining flange has a plurality of first joining flange bolt holes arranged circumferentially, the second joining flange has a plurality of second joining flange bolt holes arranged circumferentially corresponding to the first joining flange bolt holes, joining flange bolts are attached to the first joining flange bolt holes and the second joining flange bolt holes, and an outer diameter D1 of the joining flange bolts is smaller than an inner diameter D2 of the first joining flange bolt hole and an inner diameter D3 of the second joining flange bolt hole.

[0016] The present disclosure relates to an expansion joint device, wherein the relationship between the outer diameter D1 of the joining flange bolt, the inner diameter D2 of the first joining flange bolt hole, and the inner diameter D3 of the second joining flange bolt hole is such that D2 and D3 are equal to or greater than 1.2 × D1 and equal to or less than 2.0 × D1.

[0017] The present disclosure relates to an expansion joint device in which the inner diameter D2 of the first joining flange bolt hole and the inner diameter D3 of the second joining flange bolt hole are the same.

[0018] The present disclosure relates to a method for assembling an expansion joint device as described above, comprising the steps of: determining a 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 radial deviation between the center of the first conduit flange and the center of the second conduit flange to determine a distance between the center of a plurality of bolt holes in 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 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.

[0019] The present disclosure provides a method for assembling the expansion joint device described above, the method including: a step of determining a radial deviation 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 the radial deviation between the center of the first conduit flange and the center of the second conduit flange, to determine a distance between the centers of a plurality of bolt holes in the aligning flange and a center of the second joint piping body of the second joint piping; and a step of inserting the expansion joint device into the first conduit flange and the second conduit flange. a step of radially moving the second joining flange relative to the first joining flange, and radially moving the joining flange bolts relative to the first joining flange bolt holes and the second joining flange bolt holes to determine the distance between the center of the first joint piping body and the center of the second joint piping body, and fixing the first joining flange and the second joining flange with the joining flange bolts; and a step of connecting the fixing flange to the first pipeline flange, and connecting the eccentric flange and the aligning flange to the second pipeline flange.

[0020] 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.

[0021] FIG. 1 is a cross-sectional view showing one embodiment of an expansion joint device. FIG. 2 is a schematic cross-sectional view of FIG. 1. FIG. 3 is a partially cutaway side view of the expansion joint device. FIG. 4 is a view taken along line IV in FIG. 3. FIG. 5 is a cross-sectional view showing the expansion joint device. FIG. 6 is a schematic cross-sectional view of FIG. 5. FIG. 7 is a front view showing the eccentric flange and aligning flange of the second joint piping when the radial adjustment amount is 0. FIG. 8 is a front view showing the eccentric flange and aligning flange of the second joint piping when the radial adjustment amount is maximum. FIG. 9 is a flowchart showing a method of assembling an expansion joint device. FIG. 10 is a side view showing another embodiment of an expansion joint device. FIG. 11 is a side view showing a state in which the second joint flange has moved radially relative to the first joint flange in another embodiment. FIG. 12 is a flowchart showing a method of assembling an expansion joint device in another embodiment.

[0022] <Embodiments of the Present Invention> Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0023] 1 to 9 are diagrams showing an embodiment of the present disclosure.

[0024] 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 an eccentric flange and an aligning flange, and FIG. 9 is a flowchart showing a method of assembling the expansion joint device.

[0025] 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.

[0026] In this embodiment, the first pipe 1 and the second pipe 2 are existing pipes, and typically have deviations from standard design values ​​in the axial and radial directions. 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.

[0027] 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.

[0028] Such an expansion joint device 10 includes a first joint pipe 11 having a fixed flange 13 connected to a first conduit flange 1A and a first joint pipe body 12, a second joint pipe 21 having an eccentric flange 23 connected to a second conduit flange 2A and a second joint pipe body 22, and a disk-shaped aligning flange 30 attached to the outer periphery of the eccentric flange 23.

[0029] Of these, the first joint pipe body 12 of the first joint pipe 11 is cylindrical, and the fixing flange 13 is disk-shaped. The fixing flange 13 is brought into contact with the first conduit flange 1A. The fixing flange 13 and the first conduit flange 1A are connected to each other by inserting fastening bolts 4 into bolt holes 13a of the fixing flange 13 and bolt holes 1a of the first conduit flange 1A, and tightening the fastening bolts 4 with fastening nuts 5.

[0030] The second joint pipe body 22 of the second joint pipe 21 is formed 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.

[0031] 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.

[0032] As described above, the aligning flange 30 is disk-shaped and attached to the outer periphery of the eccentric flange 23. The aligning flange 30 has an inner contact surface 31 that contacts the circular eccentric outer periphery 25 of the eccentric flange 23, and an eccentric outer periphery 32 that is eccentric relative to the inner contact surface 31.

[0033] The aligning flange 30 also has a retaining portion 33 arranged axially adjacent to the abutting inner surface 31, and this retaining portion 33 clamps the eccentric flange 23 of the second joint piping 21 between itself and the second pipeline flange 2A.

[0034] Next, the aligning flange 30 will be further described.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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 retaining body 18 attached to the fixing portion 16 by an attachment bolt 19.

[0042] The first joint pipe body 12 is movable along the axial direction on the outer surface of the second joint pipe body 22 .

[0043] 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 reliable connection between the first pipeline flange 1A and the second pipeline flange 2A using the expansion joint device 10.

[0044] 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.

[0045] 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.

[0046] Next, the operation of this embodiment having the above-described configuration will be described with reference to the flowchart shown in FIG.

[0047] 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.

[0048] 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 that it matches the radial offset between the center of the first pipeline flange 1A and the center of the second pipeline flange 2A.

[0049] 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.

[0050] First, with reference 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 pipe body 22 of the second joint pipe 21, i.e., the case where the radial adjustment amount by the expansion joint device 10 is 0.

[0051] 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.

[0052] 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.

[0053] As shown in FIGS. 1 and 2 , the center C3 of the multiple bolt holes 35 of the aligning flange 30 and the eccentric outer peripheral surface 32 is offset radially downward by a distance t2 from the center 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.

[0054] 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.

[0055] As described above, the distance t1 between C2 and C1 is the same as the distance t2 between C3 and C2.

[0056] 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 is 0 (see FIGS. 1, 2, and 7).

[0057] 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, that is, the case where the radial adjustment amount by the expansion joint device 10 is maximized.

[0058] 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 pipe body 22.

[0059] 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.

[0060] As shown in FIGS. 1 and 2 , the center C3 of the multiple bolt holes 35 of the aligning flange 30 and the eccentric outer peripheral surface 32 is offset radially downward by a distance t2 from the center 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.

[0061] 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.

[0062] As described above, the distance t1 between C2 and C1 is the same as the distance t2 between C3 and C2.

[0063] 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).

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] Thereafter, the fastening bolts 4 are inserted into the bolt holes 13 a of the fixing flange 13 and the bolt holes 1 a of the first pipeline flange 1A, and the fastening bolts 4 are tightened with the fastening nuts 5 to connect the first pipeline flange 1A and the fixing flange 13 .

[0069] 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.

[0070] 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, the aligning flange 30 is slid circumferentially on the eccentric flange 23 of the second joint piping 21 based on the radial offset between the center of the first conduit flange 1A and the center of the second conduit flange 2A, and 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 is adjusted to match 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.

[0071] 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.

[0072] 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 center C1 of the second joint piping body 22 of the second joint piping 21. This allows the expansion joint device 10 to absorb the radial misalignment.

[0073] <Other Embodiments> Next, other embodiments of the present disclosure will be described with reference to Figures 10 to 12. The other embodiments shown in Figures 10 to 12 differ only in the configuration for joining the first joint pipe 11 and the second joint pipe 21, and other configurations are substantially the same as the embodiment shown in Figures 1 to 9. In the other embodiments shown in Figures 10 to 12, the same parts as those in the embodiment shown in Figures 1 to 9 are designated by the same reference numerals, and detailed description thereof will be omitted.

[0074] An expansion joint device 10 in another embodiment includes a first joint pipe 11 having a fixed flange 13 connected to a first conduit flange 1A and a first joint pipe body 12, a second joint pipe 21 having an eccentric flange 23 connected to a second conduit flange 2A and a second joint pipe body 22, and a disk-shaped aligning flange 30 attached to the outer periphery of the eccentric flange 23.

[0075] Of these, the first joint pipe body 12 of the first joint pipe 11 is cylindrical, and the fixing flange 13 is disk-shaped. The fixing flange 13 is brought into contact with the first conduit flange 1A. The fixing flange 13 and the first conduit flange 1A are connected to each other by inserting fastening bolts 4 into bolt holes 13a of the fixing flange 13 and bolt holes 1a of the first conduit flange 1A, and tightening the fastening bolts 4 with fastening nuts 5.

[0076] The second joint pipe body 22 of the second joint pipe 21 is formed 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.

[0077] 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.

[0078] As described above, the aligning flange 30 is disk-shaped and attached to the outer periphery of the eccentric flange 23. The aligning flange 30 has an inner contact surface 31 that contacts the circular eccentric outer periphery 25 of the eccentric flange 23, and an eccentric outer periphery 32 that is eccentric relative to the inner contact surface 31.

[0079] The aligning flange 30 also has a retaining portion 33 arranged axially adjacent to the abutting inner surface 31, and this retaining portion 33 clamps the eccentric flange 23 of the second joint piping 21 between itself and the second pipeline flange 2A.

[0080] Next, the aligning flange 30 will be further described.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 10 and 11 , the first joint pipe body 12 of the first joint pipe 11 has a first joint flange 40 formed at the end opposite the fixed flange 13. The second joint pipe body 22 of the second joint pipe 21 is connected to the first joint flange 40 via a second joint flange 50 joined to the first joint flange 40.

[0088] The first joining flange 40 has a plurality of first joining flange bolt holes 40a arranged circumferentially, and the second joining flange 50 has a plurality of second joining flange bolt holes 50a arranged circumferentially corresponding to the first joining flange bolt holes 40a. Joining flange bolts 60 are fitted into the first joining flange bolt holes 40a and the second joining flange bolt holes 50a, and these joining flange bolts 60 are tightened with tightening nuts 61.

[0089] The clamping nuts 61 are prevented from loosening by locking nuts 62 attached to the joining flange bolts 60. A first washer 41 is attached to the joining flange bolts 60 on the first joining flange 40 side, and a second washer 51 is attached to the second joining flange 50 side.

[0090] As described below, the inner diameter D2 of the first joining flange bolt hole 40a and the inner diameter D3 of the second joining flange bolt hole 50a are the same, and the outer diameter D1 of the joining flange bolt 60 is smaller than the inner diameter D2 of the first joining flange bolt hole 40a and the inner diameter D3 of the second joining flange bolt hole 50a.

[0091] In this embodiment, the relationship between the outer diameter D1 of the joining flange bolt 60, the inner diameter D2 of the first joining flange bolt hole 40a, and the inner diameter D3 of the second joining flange bolt hole 50a is such that D2 and D3 are equal to or greater than 1.2 × D1 and equal to or less than 2.0 × D1.

[0092] If D2 and D3 are less than 1.2 × D12, it becomes difficult to greatly adjust the distance between the center of the first joint piping body 12 and the center of the second joint piping body 22, as described below. On the other hand, if D2 and D3 exceed 2.0 × D1, it becomes difficult to stably fix the first joining flange 40 and the second joining flange 50 with the joining flange bolts 60.

[0093] Therefore, the relationship between the outer diameter D1 of the joining flange bolt 60, the inner diameter D2 of the first joining flange bolt hole 40a, and the inner diameter D3 of the second joining flange bolt hole 50a is such that D2 and D3 are equal to or greater than 1.2 × D1 and equal to or less than 2.0 × D1. The outer shape of the first washer 41 attached to the joining flange bolt 60 is significantly larger than the inner diameter D2 of the first joining flange bolt hole 40a; for example, the outer diameter of the first washer 41 is twice the inner diameter of the first joining flange bolt hole 40a. The outer shape of the second washer 51 attached to the joining flange bolt 60 is significantly larger than the inner diameter D2 of the second joining flange bolt hole 5a; for example, the outer diameter of the second washer 51 is twice the inner diameter of the second joining flange bolt hole 50a.

[0094] Furthermore, the second joint flange 50 is provided with a joint flange fixing portion 56 on its radially inward side, and a joint flange packing 47 is provided between the outer surface of the second joint pipe body 22 of the second joint pipe 21 and the joint flange fixing portion 56. This joint flange packing 47 is held by the joint flange fixing portion 56 and a joint flange holding portion 48 attached to the second joint flange 50.

[0095] In this embodiment, the joining flange holder 48 is attached to the second joining flange 50 by a mounting bolt 64, which is tightened by a tightening nut 64 a. Locking nuts 65 and 66 are also attached to the mounting bolt 64.

[0096] In addition, the first joint pipe body 12 is movable along the axial direction on the outer surface of the second joint pipe body 22 .

[0097] 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 reliable connection between the first pipeline flange 1A and the second pipeline flange 2A using the expansion joint device 10.

[0098] Next, the operation of this embodiment configured as described above will be described below with reference to the flowchart shown in FIG.

[0099] 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.

[0100] Next, at a factory or on-site, the aligning flange 30 is slid circumferentially on the eccentric flange 23 of the second joint pipe 21 based on the radial offset between the center of the first pipe flange 1A and the center of the second pipe flange 2A, 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 based on the radial offset between the center of the first pipe flange 1A and the center of the second pipe flange 2A.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] In this embodiment, the first joining flange 40 and the second joining flange 50 are fixed to each other by tightening the clamping nuts 61 onto the joining flange bolts 60, but at this stage the clamping nuts 61 have not yet been tightened onto the joining flange bolts 60.

[0105] In this embodiment, there are cases where the radial misalignment between the center of the first conduit flange 1A and the center of the second conduit flange 2A exceeds the maximum adjustment amount that can be achieved by the aligning flange 30 and the eccentric flange 23 (see FIG. 10 ). In such cases, the second connecting flange 50 is moved radially relative to the first connecting flange 40. At this time, the connecting flange bolts 60 move radially within the first connecting flange bolt holes 40a and the second connecting flange bolt holes 50a, thereby adjusting the distance between the center C4 of the first joint piping main body 12 and the center C1 of the second joint piping main body 22 (see FIGS. 1 and 11 ).

[0106] In this way, the aligning flange 30 is slid 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 center C1 of the second joint piping body 22 of the second joint piping 21, and in addition, the second joint flange 50 is moved radially relative to the first joint flange 40 to adjust the distance between the center C4 of the first joint piping body 12 and the center C1 of the second joint piping body 22. In this way, the radial misalignment between the centers of the first conduit flange 1A and the second conduit flange 2A can be reliably absorbed by the expansion joint device 10.

[0107] 10 , the joining flange bolts 60 are located at the centers of the first joining flange bolt holes 40 a and the second joining flange bolt holes 50 a. A gap 45 is formed around the joining flange bolts 60 in the first joining flange bolt holes 40 a, and a gap 55 is formed around the joining flange bolts 60 in the second joining flange bolt holes 50 a.

[0108] 11 , the second connecting flange 50 moves downward relative to the first connecting flange 40, and gaps 45 are formed above the connecting flange bolts 60 in the first connecting flange bolt holes 40a, with the lower surfaces of the connecting flange bolts 60 abutting against the wall surfaces of the first connecting flange bolt holes 40a. Then, gaps 55 are formed below the connecting flange bolts 60 in the second connecting flange bolt holes 50a, with the upper surfaces of the connecting flange bolts 60 abutting against the wall surfaces of the second connecting flange bolt holes 50a. Then, clamping nuts 61 are tightened onto the connecting flange bolts 60, and the first connecting flange 40 and the second connecting flange 50 are joined and fixed.

[0109] Thereafter, the fastening bolts 4 are inserted into the bolt holes 13 a of the fixing flange 13 and the bolt holes 1 a of the first pipeline flange 1A, and the fastening bolts 4 are tightened with the fastening nuts 5 to connect the first pipeline flange 1A and the fixing flange 13 .

[0110] 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.

[0111] DESCRIPTION OF SYMBOLS 1 First pipe 1A First pipe flange 2 Second pipe 2A Second pipe flange 4 Fastening bolt 5 Fastening nut 6 Fastening bolt 7 Fastening nut 10 Expansion joint device 11 First joint pipe 12 First joint pipe body 13 Fixing flange 16 Fixing portion 17 Packing 18 Retaining body 19 Mounting bolt 21 Second joint pipe 22 Second joint pipe body 23 Eccentric flange 25 Eccentric outer peripheral surface 30 Aligning flange 31 Abutting inner peripheral surface 32 Eccentric outer peripheral surface 35 Bolt hole 40 First joining flange 40a First joining flange bolt hole 41 First washer 45 Gap 47 Joining flange packing 48 Joining flange retaining portion 50 Second joining flange 50a Second joining flange bolt hole 51 Second washer 55 Gap 60 Joining flange bolt C1 center C2 center C3 center C4 center

Claims

1. In a telescopic joint device for connecting a first pipe flange and a second pipe flange, a first joint pipe having a fixed 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 pipe 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 the axial direction, and a disc-shaped centering flange slidably attached along the circumferential direction to the eccentric outer peripheral surface of the eccentric flange, the centering flange having a contact inner peripheral surface that contacts the eccentric outer peripheral surface and being connected to the second pipe flange, a plurality of bolt holes being formed eccentrically with respect to the contact inner peripheral surface in the centering flange, and by sliding the centering flange along the circumferential direction on the eccentric outer peripheral surface of the eccentric flange, the centers of the plurality of bolt holes of the centering flange are separated from and brought into contact with the center of the second joint pipe body of the second joint pipe.

2. The telescopic joint device according to claim 1, wherein when the eccentric direction of the plurality of bolt holes of the centering flange with respect to the contact inner peripheral surface and the eccentric direction of the eccentric outer peripheral surface of the eccentric flange with respect to the second joint pipe body are in opposite directions, the centers of the plurality of bolt holes of the centering flange coincide with the center of the second joint pipe body of the second joint pipe.

3. The telescopic joint device according to claim 1 or 2, wherein when the eccentric direction of the plurality of bolt holes of the centering flange with respect to the contact inner peripheral surface and the eccentric direction of the eccentric outer peripheral surface of the eccentric flange with respect to the second joint pipe body are in the same direction, the centers of the plurality of bolt holes of the centering flange are farthest from the center of the second joint pipe body of the second joint pipe.

4. The telescopic joint device according to claim 1, wherein the first joint pipe body is slidably attached to the outer surface of the second joint pipe body in the axial direction, and a packing is interposed between the first joint pipe body and the second joint pipe body.

5. The telescopic joint device according to claim 4, wherein a packing holding portion for holding the packing is provided on the first joint pipe body or the second joint pipe body.

6. The telescopic joint device according to claim 1, wherein the centering flange has an eccentric outer peripheral surface that is eccentric with respect to the contact inner peripheral surface, and the centers of the plurality of bolt holes of the centering flange coincide with the center of the eccentric outer peripheral surface of the centering flange.

7. The centering flange is provided adjacent to the abutting inner peripheral surface and has a holding portion for holding the eccentric flange between the eccentric flange and the second pipe flange. The expansion joint device according to claim 1.

8. The first joint pipe body has a first joint flange, the second joint pipe body is connected to the first joint flange via a second joint flange joined to the first joint flange, the first joint flange has a plurality of first joint flange bolt holes arranged circumferentially, the second joint flange is provided corresponding to the first joint flange bolt holes and has a plurality of second joint flange bolt holes arranged circumferentially, a joint flange bolt is mounted in the first joint flange bolt hole and the second joint flange bolt hole, and an outer diameter D1 of the joint flange bolt is smaller than an inner diameter D2 of the first joint flange bolt hole and an inner diameter D3 of the second joint flange bolt hole. The expansion joint device according to claim 1.

9. The relationship between the outer diameter D1 of the joint flange bolt, the inner diameter D2 of the first joint flange bolt hole, and the inner diameter D3 of the second joint flange bolt hole is such that D2 and D3 are 1.2×D1 or more and 2.0×D1 or less. The expansion joint device according to claim 8.

10. The inner diameter D2 of the first joint flange bolt hole and the inner diameter D3 of the second joint flange bolt hole are the same. The expansion joint device according to claim 9.

11. In the method of assembling the expansion joint device according to claim 1, a step of obtaining a radial displacement amount between the center of the first pipe flange and the center of the second pipe flange, a step of sliding the centering flange along the circumferential direction on the eccentric outer peripheral surface of the eccentric flange based on the radial displacement amount between the center of the first pipe flange and the center of the second pipe flange to determine a distance between the centers of a plurality of bolt holes of the centering flange and the center of the second joint pipe body of the second joint pipe, a step of inserting the expansion joint device into the first pipe flange and the second pipe flange, and a step of connecting the fixing flange to the first pipe flange and connecting the eccentric flange and the centering flange to the second pipe flange. A method of assembling an expansion joint device.

12. In the method of assembling the telescopic joint device according to claim 8, a step of obtaining a radial displacement amount between the center of the first pipeline flange and the center of the second pipeline flange; based on the radial displacement amount between the center of the first pipeline flange and the center of the second pipeline flange, sliding the centering flange along the circumferential direction on the eccentric outer peripheral surface of the eccentric flange to determine the distance between the centers of the plurality of bolt holes of the centering flange and the center of the second joint pipe body of the second joint pipe; a step of inserting the telescopic joint device into the first pipeline flange and the second pipeline flange; moving the second joint flange in the radial direction with respect to the first joint flange, and moving the joint flange bolts in the radial direction with respect to the first joint flange bolt holes and the second joint flange bolt holes to determine the distance between the center of the first joint pipe body and the center of the second joint pipe body, and fixing the first joint flange and the second joint flange with the joint flange bolts; a method of assembling a telescopic joint device, comprising a step of connecting the fixing flange to the first pipeline flange and connecting the eccentric flange and the centering flange to the second pipeline flange.

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