Piping support structure

Abstract

The piping support structure includes a plate-shaped member that abuts against the outer peripheral surface of the piping, a cylindrical tubular member that supports the plate-shaped member, and a base that supports the tubular member. The plate-shaped member has a supported portion supported by the tubular member and an inner portion surrounded by the supported portion, and the heat capacity per unit volume of the inner portion is smaller than that of the supported portion.

Description

Technical Field

[0001] The present invention relates to a pipe supporting structure. Background Art

[0002] As a structure for supporting piping for circulating fluid such as gas inside, for example, the structure described in Patent Document 1 is known.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 5-263971 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] The pipe support structure described in Patent Document 1 clamps the pipe and provides a reinforcing plate between the pipe and the support member, but this requires a long manufacturing process. Therefore, the present invention proposes a structure in which a plate-like member is fixed to the outer circumference of the pipe by welding, and a supporting structure such as a tubular member is welded to the plate-like member.

[0008] On the other hand, in a structure where a plate-like member is fixed to the outer circumference of a pipe by welding, a temperature difference may sometimes occur between the pipe and the plate-like member, for example, when the temperature inside the pipe differs from the temperature outside. This temperature difference can cause the plate-like member to deform, generating thermal stress. This thermal stress can damage the pipe support structure, such as the plate-like member peeling off from the pipe.

[0009] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a pipe support structure capable of suppressing damage caused by thermal stress.

[0010] Technical Solution

[0011] The piping support structure of the present invention includes a plate-like member that abuts against the outer peripheral surface of the piping, a cylindrical tubular member that supports the plate-like member, and a base that supports the tubular member. The plate-like member has a supported portion supported by the tubular member and an inner portion surrounded by the supported portion, and the heat capacity per unit volume of the inner portion is smaller than that of the supported portion.

[0012] Effects of the Invention

[0013] According to the present invention, it is possible to provide a pipe support structure capable of suppressing damage due to thermal stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a diagram showing one mode of supporting a pipe inside a pipeline in the pipe support structure according to the present embodiment.

[0015] Figure 2 This is a diagram showing an example of a cross-sectional configuration of a pipe support structure.

[0016] Figure 3 This is a diagram showing a state where the pipe support structure is viewed from the pipe side.

[0017] Figure 4 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure.

[0018] Figure 5 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure.

[0019] Figure 6 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure.

[0020] Figure 7 This is a diagram showing another example of the pipe support structure as viewed from the pipe side.

[0021] Figure 8 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure.

[0022] Figure 9 This is a diagram showing another example of the pipe support structure as viewed from the pipe side.

[0023] Figure 10 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure.

[0024] Figure 11 It is a diagram showing another example of the cross-sectional configuration of the pipe and the pipe support structure. DETAILED DESCRIPTION

[0025] The following describes an embodiment of the piping support structure of the present invention with reference to the accompanying drawings. It should be noted that the present invention is not limited to this embodiment. Furthermore, the components of the following embodiments include those that are easily replaceable by those skilled in the art, or are substantially the same.

[0026] Figure 1 This figure shows one embodiment of a pipe support structure 100 supporting a pipe 50 within a duct 60. The pipe support structure 100 supports the pipe 50 inserted into the duct 60. An example of the pipe 60 is the exhaust duct of a gas turbine. In this case, the gas G1 flowing through the duct 60 is a high-temperature gas. It should be noted that the duct 60 is not limited to the exhaust duct of a gas turbine.

[0027] An example of the piping 50 is the exhaust pipe of a gas turbine. The piping 50 can be cylindrical or rectangular. The piping 50 is inserted into the pipe 60 at an angle relative to the flow direction of the gas G1 flowing through the pipe 60 and is curved within the pipe 60 to follow the flow direction of the gas G1. The gas G2 flowing through the piping 50 is, for example, a low-temperature gas having a lower temperature than the high-temperature gas G1. It should be noted that the piping 50 is not limited to the exhaust pipe of a gas turbine.

[0028] A predetermined temperature difference is generated between the interior of the pipe 60 and the interior of the piping 50, that is, between the interior and exterior of the piping 50, depending on the temperatures of the gases G1 and G2. In the piping support structure 100 of this embodiment, when the gases G1 and G2 flow, the predetermined temperature difference that can be generated between the interior and exterior of the piping 50 is, for example, 100°C or greater. This predetermined temperature difference is greater than the temperature difference that can occur in a natural environment, such as the temperature difference between summer and winter. Thus, the piping 50 is placed in an environment where a predetermined temperature difference between the interior and exterior, greater than the temperature difference that can occur in a natural environment, is generated, for example, a temperature difference of 100°C or greater.

[0029] Figure 2 This is a diagram showing an example of a cross-sectional structure of the pipe support structure 100 . Figure 3 1 is a diagram showing a state where the pipe support structure 100 is viewed from the pipe 50 side. Figure 2 and Figure 3 As shown, the pipe support structure 100 includes a plate member 10, a tubular member 20, a slide plate (second plate member) 30, and a pedestal 40. The pipe support structure 100 supports the distal end side of the curved portion of the pipe 50.

[0030] The plate-like member 10 is in contact with the outer peripheral surface 51 of the pipe 50 and is welded to the pipe 50 by, for example, full penetration welding, fillet welding, etc. The plate-like member 10 has a circular shape when viewed from the direction in which the pipe 50 is supported, that is, from the axial direction of the central axis AX of the tubular member 20 described later.

[0031] The plate-like member 10 has a supported portion 11 and an inner portion 12. The supported portion 11 is an annular portion including the outer peripheral surface of the plate-like member 10 and is supported and engaged by a tubular member 20 described later.

[0032] When viewed from the supporting direction of the pipe 50 (the axial direction of the central axis AX), the inner portion 12 is a circular portion arranged on the inner side of the supported portion 11. The heat capacity per unit volume of the inner portion 12 is smaller than that of the supported portion 11. In the present embodiment, the inner portion 12 is open. Therefore, in the plate-like component 10, the heat capacity per unit volume of the inner portion 12 is smaller than that of the same structure as the supported portion 11, and the deformation amount caused by heat is smaller. The plate-like component 10 does not produce thermal deformation in the inner portion 12, and therefore, the structure as a whole can suppress thermal deformation.

[0033] The tubular member 20 is cylindrical centered on the central axis AX and is fixed to the plate-shaped member 10 by welding, for example. The tubular member 20 supports the plate-shaped member 10 with one end surface 20a of the tubular member 20 in contact with the plate-shaped member 10 .

[0034] The sliding plate 30 is disposed between the tubular member 20 and the pedestal 40. The sliding plate 30 supports the tubular member 20 while abutting against the other end surface 20b of the tubular member 20. The sliding plate 30 includes a support portion 31 for supporting the tubular member 20 and an opening 32 provided inside the support portion 31. The provision of the opening 32 in the sliding plate 30 suppresses thermal deformation of the sliding plate 30, similar to the plate-like member 10 described above.

[0035] The pedestal 40 supports the tubular member 20 via the sliding plate 30. The pedestal 40 includes a support portion (pedestal-side support portion) 41 that supports the sliding plate 30 and an opening 32 provided inside the support portion 41. Providing the opening 42 in the pedestal 40 suppresses thermal deformation of the pedestal 40, similar to the plate-like member 10 and sliding plate 30 described above.

[0036] When the pipe support structure 100 is provided on the pipe 50, the plate-like member 10 is first positioned at a predetermined position on the outer peripheral surface 51 of the pipe 50 and then welded to the pipe 50. After the plate-like member 10 is joined, the supported portion 11 of the plate-like member 10 abuts against the end surface 20a of the tubular member 20, and the tubular member 20 is joined to the plate-like member 10 by full penetration welding.

[0037] After joining the tubular member 20, the support portion 31 of the sliding plate 30 is brought into contact with the other end surface 20b of the tubular member 20, and the sliding plate 30 is joined to the tubular member 20 by full penetration welding. After joining the sliding plate 30, the pedestal 40 is positioned to support the sliding plate 30. At this time, the pedestal 40 is positioned so that the opening 42 corresponds to the opening 32 of the sliding plate 30.

[0038] As described above, the piping support structure 100 of the present embodiment comprises: a plate-like member 10 abutting against the outer peripheral surface 51 of the piping 50; a tubular member 20, which is cylindrical and fixed to the plate-like member 10 in a state where the end surface 20a on one side in the axial direction of the central axis AX abuts against the plate-like member 10; and a pedestal 40, which supports the end surface 20a on the other side in the axial direction of the tubular member 20. In the plate-like member 10, the heat capacity per unit volume of the inner portion 12 on the inner side of the supported portion 11 abutted by the tubular member 20 as viewed in the axial direction is smaller than that of the supported portion 11.

[0039] According to this configuration, by making the heat capacity of the inner portion 12 of the plate-like member 10, which is susceptible to thermal deformation, smaller than that of the supported portion 11, thermal deformation of the plate-like member 10 caused by the temperature difference between the pipe 50 and the plate-like member 10 can be suppressed. This can suppress the generation of thermal stress in the plate-like member 10, thereby preventing damage to the pipe support structure 100 caused by this thermal stress.

[0040] In the piping support structure 100 of this embodiment, the piping 50 is placed in an environment where a predetermined temperature difference is generated between the inside and outside. The predetermined temperature difference between the inside and outside is greater than the temperature difference that can occur in a natural environment, for example, a temperature difference of 100°C or greater. In this configuration, even when a predetermined temperature difference between the inside and outside of the piping 50 is greater than the temperature difference that can occur in a natural environment, thermal deformation of the plate-like member 10 caused by the temperature difference between the piping 50 and the plate-like member 10 can be suppressed.

[0041] In the pipe support structure 100 of this embodiment, the outer shape of the plate-shaped member 10 when viewed in the axial direction is circular. Therefore, thermal deformation of the plate-shaped member 10 caused by the temperature difference between the pipe 50 and the plate-shaped member 10 can be more reliably suppressed.

[0042] In the piping support structure 100 of this embodiment, the inner portion 12 of the plate-like member 10 is opened. Therefore, compared to a case where the inner portion 12 is not opened, the portion of the plate-like member 10 that is subject to thermal deformation is reduced, thereby more reliably suppressing damage to the piping support structure 100 caused by thermal stress.

[0043] The piping support structure 100 of this embodiment further includes a sliding plate 30 disposed between the tubular member 20 and the pedestal 40. The sliding plate 30 has an open inner side of a support portion 31 that supports the tubular member 20. Furthermore, the pedestal 40 has an open inner side of a support portion 41 that supports the tubular member 20. Consequently, the number of areas of the piping support structure 100 that are susceptible to thermal deformation is reduced, and damage to the piping support structure 100 caused by thermal stress can be more reliably suppressed.

[0044] Figure 4 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure. Figure 4 The piping support structure 200 shown is similar to the piping support structure 100 described above and includes a plate-shaped member 10, a tubular member 20, a sliding plate 30, and a pedestal 40. In the piping support structure 200, the inner peripheral surface 11a of the supported portion 11 of the plate-shaped member 10, which faces the opened inner portion 12, is welded to the piping 50 via a weld 13. Therefore, the plate-shaped member 10 is more firmly bonded to the piping 50. The remaining configuration is the same as that of the piping support structure 100 described above.

[0045] Thus, in the piping support structure 200 of this embodiment, the inner peripheral surface 11a of the plate-shaped member 10 is welded to the piping 50 via the weld portion 13, so that the plate-shaped member 10 can be more firmly joined to the piping 50. Therefore, damage to the piping support structure 200 caused by thermal stress can be more reliably suppressed.

[0046] Figure 5 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure. Figure 5 The piping support structure 300 shown includes a plate-shaped member 10, a tubular member 320, a sliding plate 30, and a pedestal 40. The inner peripheral surface 11a of the inner portion 12 facing the plate-shaped member 10 is welded to the piping 50 via a weld 13. Furthermore, in the piping support structure 300, the tubular member 320 is provided with a first tubular member 21 on the axial side of the plate-shaped member 10 and a second tubular member 22 on the axial side of the pedestal 40, both of which are welded via a weld 23. The remaining configuration is the same as that of the piping support structure 200 described above.

[0047] When the piping support structure 300 is installed on the piping 50 described above, the plate-shaped member 10 is first joined to the piping 50 by full penetration welding, and the first tubular member 21 is then joined to the supported portion 11 of the plate-shaped member 10 by full penetration welding, as described above. At this time, the joined portion between the first tubular member 21 and the supported portion 11 can be confirmed from the inner circumference of the base-side end of the first tubular member 21. This allows confirmation that the weld between the first tubular member 21 and the supported portion 11 is free of defects. After joining the first tubular member 21, the second tubular member 22 is then joined to the first tubular member 21 by welding.

[0048] Thus, in the piping support structure 300 of the present embodiment, the tubular member 20 is provided in a state where the first tubular member 21 on the plate-shaped member 10 side in the axial direction and the second tubular member 22 on the pedestal 40 side in the axial direction are welded. Therefore, for example, when the plate-shaped member 10 is joined to the first tubular member 21, it is possible to confirm whether there is any defect in the joint between the first tubular member 21 and the supported portion 11.

[0049] Figure 6 and Figure 7 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure. Figure 6 Indicates the cross-sectional composition, Figure 7 The structure viewed from the pipe 50 side is shown. Figure 6 and Figure 7 The piping support structure 400 shown includes a plate-shaped member 410, a tubular member 20, a sliding plate 30, and a pedestal 40. In the piping support structure 400, the inner portion 14 of the plate-shaped member 410 is porous. This reduces the heat capacity per unit volume compared to a case where the inner portion 14 is not porous but solid like the supported portion 11. This reduces thermal deformation of the inner portion 14 and the generation of thermal stress.

[0050] Thus, in the pipe support structure 400 of this embodiment, the inner portion 14 of the plate-shaped member 410 is porous. This reduces the heat capacity per unit volume of the inner portion 14, thereby suppressing thermal deformation of the inner portion 14 and inhibiting the generation of thermal stress.

[0051] Figure 8 and Figure 9 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure. Figure 8 Indicates the cross-sectional composition, Figure 9 The structure viewed from the pipe 50 side is shown. Figure 8 and Figure 9 The piping support structure 500 shown includes a plate-shaped member 510 , a tubular member 20 , a sliding plate 30 , and a pedestal 40 .

[0052] In the pipe support structure 500, the plate-shaped member 510 includes a plurality of divided members 511. The plurality of divided members 511 are arranged with spaces 513 in the axial direction around the central axis AX so as to surround the inner portion 512 (see FIG. Figure 9 ).exist Figure 9 In the example shown, four splitting members 511 are arranged in the axial direction around the central axis AX, and the intervals 513 are equal, but this is not limited to this. The number of splitting members 511 may be three or less, or five or more. In addition, at least one of the intervals 513 may be different from the others.

[0053] The aforementioned gap 513 is a portion that does not undergo thermal deformation. Thus, in addition to the opening portion including the inner portion 512, the plate-like member 510 also includes the gap 513 that does not undergo thermal deformation in the circumferential direction along the central axis AX. Therefore, the plate-like member 510 can further suppress thermal deformation.

[0054] Thus, in the piping support structure 500 of this embodiment, the plate-shaped member 510 includes a plurality of segmented members 511 arranged with spaces 513 between them in the axial direction of the central axis AX so as to surround the inner portion 12. This configuration further reduces the portion of the plate-shaped member 510 that is susceptible to thermal deformation, thereby further suppressing thermal deformation and more reliably preventing damage to the piping support structure 500 caused by thermal stress.

[0055] Figure 10 It is a diagram showing another example of the cross-sectional configuration of the pipe support structure. Figure 10 The illustrated piping support structure 600 includes a plate-shaped member 610, a tubular member 20, a sliding plate 30, and a pedestal 40. In the piping support structure 600, the thickness of an inner portion 612 of the plate-shaped member 610 is thinner than the thickness of a supported region 611. More specifically, the inner portion 612 is formed with the surface on the tubular member 20 side being recessed. It should be noted that the inner portion 612 may be formed with the surface on the piping 50 side being recessed, or with both the surfaces on the tubular member 20 side and the piping 50 side being recessed.

[0056] Thus, in the piping support structure 600 of this embodiment, the thickness of the inner portion 612 of the plate-like member 610 along the axial direction is thinner than the thickness of the supported region 611. This configuration further reduces the portion of the plate-like member 610 that is susceptible to thermal deformation, thereby more reliably preventing damage to the piping support structure 600 caused by thermal stress.

[0057] Figure 11 1 is a diagram showing another example of the cross-sectional structure of the pipe and the pipe support structure. Figure 11In the example shown, an opening 52 is provided in the piping 50A. As a piping support structure supporting the piping 50A, the piping support structure 100 is shown as an example, but it is not limited thereto and may be any of the above-mentioned piping support structures 200, 300, 400, 500, and 600. The piping 50A has an opening 52 in the portion corresponding to the supported portion 11 of the plate-shaped member 10. The opening 52 is formed to a size corresponding to the inner portion 12 of the plate-shaped member 10. It should be noted that the portion of the piping 50A corresponding to the plate-shaped member 10 only needs to have a smaller heat capacity per unit volume than other portions. That is, the piping 50A may also have a thin-walled portion (recessed portion) or a porous portion in the portion corresponding to the plate-shaped member 10 instead of the opening 52. It should be noted that when the piping 50A has a recessed portion, the recessed portion may be arranged on the inner circumferential surface side of the piping 50A or on the outer circumferential surface side.

[0058] When installing the pipe support structure 100 on the pipe 50A, first, the opening 52 of the pipe 50A is aligned with the inner portion 12 of the plate-like member 10. The plate-like member 10 is then brought into contact with the outer peripheral surface 51 of the pipe 50A and joined to the pipe 50A by full penetration welding. The tubular member 20 is then joined to the supported portion 11 of the plate-like member 10 by full penetration welding.

[0059] As a result, the portion of the pipe 50A corresponding to the plate-shaped member 10 has a lower heat capacity per unit volume than the other portions, thereby suppressing thermal deformation on the pipe 50A side. For example, if the pipe 50A has an opening 52, the pipe support structure 100 can be installed at a position corresponding to the opening 52. This also reduces the portion of the pipe 50A side that can be thermally deformed, thereby suppressing damage to the pipe support structure 100 caused by thermal stress.

[0060] The technical scope of the present invention is not limited to the above-described embodiment and can be modified as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, the pipes 50 and 50A are arranged within the duct 60. However, the pipes 50 and 50A are not limited to the duct 60. If the pipes 50 and 50A are located in an environment with a temperature difference between the inside and outside of the pipes, such as 100°C or higher, which is greater than the temperature difference between summer and winter, the pipes 50 and 50A may be arranged in a pipe separate from the pipe 60, or may be arranged in a space inside a furnace or indoors rather than in the pipes.

[0061] Furthermore, in the above embodiment, the case where the gas G1 supplied to the pipe 60 is a high-temperature gas and the gas G2 flowing through the pipes 50 and 50A is a low-temperature gas is described as an example, but the present invention is not limited to this. For example, the gas G2 may be higher in temperature than the gas G1. In this way, when the inside of the pipes 50 and 50A is high in temperature and the outside is low in temperature, a temperature difference may occur between the pipes 50 and 50A and the plate-like member 10. However, the structure of the above embodiment can suppress thermal deformation of the plate-like member 10 caused by this temperature difference. It should be noted that when the gas G2 is higher in temperature than the gas G1, as described above, the predetermined temperature difference that can be generated between the inside and outside of the pipes 50 and 50A is, for example, in the range of 100°C or higher, which is greater than the temperature difference generated in summer and winter.

[0062] Description of Reference Numerals

[0063] 10, 410, 510, 610 plate-shaped components

[0064] 11 supported part

[0065] 11a inner circumference

[0066] 12, 14, 512, 612 inner part

[0067] 13, 23 welding parts

[0068] 20, 320 tubular components

[0069] 20a, 20b end faces

[0070] 21 first tubular member

[0071] 22 second tubular member

[0072] 30 sliding plate (second plate-shaped member)

[0073] 31, 41 supporting parts

[0074] 32, 42 opening parts

[0075] 40 pedestals

[0076] 50, 50A piping

[0077] 51 outer surface

[0078] 52 opening

[0079] 60 pipelines

[0080] 100, 200, 300, 400, 500, 600 piping support structure

[0081] 511 split components

[0082] 513 interval

[0083] 611 supported area

[0084] AX center axis

[0085] G1, G2 gas

Claims

1. A piping support structure, comprising: a plate-shaped member abutting against an outer peripheral surface of a second pipe disposed inside the first pipe; a tubular member having a cylindrical shape and fixed to the plate-like member with one end portion of the central axis in the axial direction thereof abutting against the plate-like member; and a pedestal supporting the other end portion of the tubular member in the axial direction; The pedestal is provided on the wall of the first pipe. The plate-shaped member and the tubular member are arranged inside the first pipe. The plate-like member has a supported portion supported by the tubular member and an inner portion surrounded by the supported portion. The heat capacity per unit volume of the inner portion is smaller than that of the supported portion.

2. The pipe support structure according to claim 1, wherein: The first pipe is used for the circulation of the first gas. The second pipe is used to flow a second gas having a temperature different from that of the first gas. The second pipe is disposed in an environment where the first gas and the second gas flow therethrough, resulting in a temperature difference of 100° C. or more between the inside of the second pipe and the outside of the second pipe, that is, the inside of the first pipe.

3. The pipe support structure according to claim 1, wherein: The outer shape of the plate-shaped member when viewed in the axial direction is circular.

4. The pipe support structure according to any one of claims 1 to 3, wherein: The inner portion of the plate-shaped member is opened.

5. The pipe support structure according to claim 4, wherein: The plate-shaped member is welded to the second pipe at an inner peripheral surface thereof facing the inner portion.

6. The pipe support structure according to claim 4, wherein: The plate-shaped member includes a plurality of divided members that are arranged at intervals in a direction around the central axis so as to surround the inner portion.

7. The pipe support structure according to claim 1, wherein: The tubular member is provided in a state where a first tubular member arranged on the plate-shaped member side in the axial direction and a second tubular member arranged on the pedestal side in the axial direction are welded.

8. The pipe support structure according to claim 1, wherein: The inner portion of the plate-shaped member is porous.

9. The pipe support structure according to claim 1, wherein: The thickness of the inner portion of the plate-like member in the axial direction is thinner than the thickness of the supported portion.

10. The pipe support structure according to claim 1, wherein It also includes a second plate-shaped member disposed between the tubular member and the pedestal. The inner side of the supporting portion of the second plate-shaped member that supports the tubular member is opened.

11. The pipe support structure according to claim 1, wherein: The inner side of the pedestal side supporting portion of the pedestal supporting the tubular member is opened.

12. The pipe support structure according to claim 1, wherein The heat capacity per unit volume of a portion of the second pipe corresponding to the plate-shaped member is smaller than that of the other portions.

13. A gas turbine comprising the pipe support structure according to any one of claims 1 to 12. The first pipe is an exhaust pipe, and the second pipe is an air extraction pipe.

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