Fixing device for meter mounting plate and transformer

Abstract

To provide a fixation device of a measuring instrument mounting plate to flexibly deal with an arrangement change of the measuring instrument mounting plate in a current transformer and the current transformer which can flexibly deal with the arrangement change of the measuring instrument mounting plate.SOLUTION: A fixation device 10 of a measuring instrument mounting plate includes a first fixation unit 1. The first fixation unit 1 comprises: a first sandwiching part 11 and a second sandwiching part 12 which are arranged so as to sandwich at least a first fin 106A and a second fin 106B of the plurality of fins 106 from the Y direction; a first connection part 13 which includes a first end part 13A that is connected to the first set of sandwiching parts 11, a second end part 13B that is connected to the second sandwiching part 12 and a first intermediate part 13C that connects the first end part 13A and the second end part 13B and passes through a space between the first fin 106A and the second fin 106B; a first positioning part 14 which positions the first sandwiching part 11 with respect to the first end part 13A; a second positioning part 15 which positions the second sandwiching part 12 with respect to the second end part 13B; and a first fixation part 16 which is attached to the second sandwiching part 12 to fix a measuring instrument mounting plate 108.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a fastening device for an instrument mounting plate and a transformer. [Background technology]

[0002] Conventionally, transformers equipped with an instrument mounting plate for mounting protective instruments and nameplates in one place have been known. Generally, the instrument mounting plate is attached to the tank or radiator of the transformer by welding. Japanese Utility Model Application Laid-Open Publication No. 59-98613 (Patent Document 1) discloses a transformer in which the instrument mounting plate is attached to the radiator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 59-98613 Summary of the Invention [Problem to be solved by the invention]

[0004] The meter mounting plate must be located in a position on the transformer that is easy for the manager to see. The position on the transformer that is easy for the manager to see varies depending on the structure of the transformer and the connection structure between the transformer and other equipment located around it. In other words, the location of the meter mounting plate on a transformer may be changed depending on the customer's requirements. For this reason, transformers are required to be designed with a degree of freedom in the location of the meter mounting plate.

[0005] The main object of the present disclosure is to provide an instrument mounting plate fixing device that can flexibly accommodate changes in the arrangement of an instrument mounting plate in a transformer, and a transformer that can flexibly accommodate changes in the arrangement of an instrument mounting plate. [Means for solving the problem]

[0006] The present disclosure provides an instrument mounting plate fixing device for a transformer including a tank that houses a transformer body and is filled with an insulating medium, a heat sink including a plurality of fins spaced apart from one another in a first direction to cool the insulating medium, and an instrument mounting plate on which instruments are mounted. The fixing device includes a first fixing unit. The first fixing unit includes: a first set of clamping portions arranged to sandwich at least a first fin and a second fin of the plurality of fins from a second direction intersecting the first direction; a first connecting portion having a first end connected to one of the clamping portions of the first set, a second end connected to the other of the clamping portions of the first set, and a first intermediate portion connecting between the first end and the second end and passing between the first fin and the second fin; a first positioning portion for positioning one of the clamping portions of the first set relative to the first end of the first connecting portion; a second positioning portion for positioning the other of the clamping portions of the first set relative to the second end of the first connecting portion; and a first fixing portion attached to one of the clamping portions of the first set and for fixing the instrument mounting plate.

[0007] The transformer according to the present disclosure comprises a tank that houses the transformer body and is filled with an insulating medium, a first radiator and a second radiator for cooling the insulating medium, a first fixing device for fixing an instrument mounting plate on which an instrument is mounted to the first radiator, and a second fixing device for fixing the instrument mounting plate to the second radiator. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide an instrument mounting plate fixing device that can flexibly accommodate changes in the arrangement of an instrument mounting plate in a transformer, and a transformer that can flexibly accommodate changes in the arrangement of an instrument mounting plate. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a plan view illustrating a transformer according to a first embodiment. [Figure 2] 1 is a front view for explaining a transformer according to a first embodiment. [Figure 3]3 is a cross-sectional view for explaining a fixing device for an instrument mounting plate according to the first embodiment. FIG. [Figure 4] 1 is a front view for explaining a fixing device for an instrument mounting plate according to Embodiment 1. FIG. [Figure 5] 1 is a side view for explaining a fixing device for an instrument mounting plate according to the first embodiment. FIG. [Figure 6] FIG. 10 is a front view for explaining a modified example of the fixing device for the instrument mounting plate according to the first embodiment. [Figure 7] FIG. 10 is a plan view illustrating a transformer according to a second embodiment. [Figure 8] FIG. 10 is a front view illustrating a transformer according to a second embodiment. [Figure 9] FIG. 10 is a plan view illustrating a transformer according to a second embodiment. [Figure 10] FIG. 10 is a plan view for explaining a modified example of the transformer according to the second embodiment. [Figure 11] FIG. 10 is a plan view for explaining another modified example of the transformer according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. For ease of explanation, each drawing shows a Cartesian coordinate system having an X direction (first direction), a Y direction (second direction), and a Z direction (third direction) that are orthogonal to each other. The Z direction is the direction opposite to the direction of gravity. Hereinafter, the direction along the direction of gravity relative to a comparison object will be referred to as "downward," and the opposite direction will be referred to as "upward."

[0011] Embodiment 1 <Transformer configuration> As shown in FIGS. 1 and 2, a transformer 100 according to the first embodiment includes a tank 101, a plurality of radiators 102, and a plurality of bushings 103.

[0012] The tank 101 accommodates a transformer body 101A (see FIG. 2) therein. The transformer body 101A includes an iron core and a coil attached to the iron core. The inside of the tank 101 is filled with an insulating medium. The transformer body 101A is immersed in the insulating medium. The insulating medium is, for example, insulating oil, such as mineral oil.

[0013] Each of the multiple radiators 102 includes an upper header 104, a lower header 105, and multiple fins 106. One end of each of the upper header 104 and the lower header 105 is connected to the tank 101. Each of the multiple fins 106 is connected in parallel between the upper header 104 and the lower header 105 at the other end of each of the upper header 104 and the lower header 105. The tank 101 and the multiple radiators 102 form a circuit through which an insulating medium circulates. The insulating medium is heated by the transformer body 101A in the tank 101, then cooled in each of the multiple radiators 102, and then flows back into the tank 101.

[0014] In each of the plurality of heat sinks 102, the upper header 104 and the lower header 105 extend along the X direction, and the plurality of fins 106 are arranged at intervals in the X direction. The intervals between two adjacent fins 106 are, for example, equal to each other.

[0015] The plurality of heat radiators 102 include, for example, a first group of heat radiators 102A arranged at intervals from each other in the Y direction on one side of the X direction (first direction) relative to the tank 101 and the transformer body 101A, and a second group of heat radiators 102B arranged at intervals from each other in the Y direction on the other side of the X direction relative to the tank 101 and the transformer body 101A.

[0016] The material forming the plurality of fins 106 may be any material with high thermal conductivity, including, for example, iron (Fe).

[0017] Each of the multiple heat sinks 102 may further include at least one reinforcing member 107 (see FIGS. 3 to 5) for suppressing deformation of each of the multiple fins 106 in the X direction, for example. The at least one reinforcing member 107 is disposed between the upper header 104 and the lower header 105 in the Z direction, and is connected to at least one end and the other end of each of the multiple fins 106 in the Y direction. The at least one reinforcing member 107 maintains the spacing between two adjacent fins 106 in the X direction.

[0018] <Configuration of the instrument mounting plate fixing device> 3 and 4, the instrument mounting plate 108 and the fixing device 10 for the instrument mounting plate 108 are not welded to the transformer 100. The fixing device 10 shown in Fig. 3 is provided to detachably fix the instrument mounting plate 108 to the transformer 100 according to the first embodiment. In this embodiment, the side of the transformer 100 on which the instrument mounting plate 108 is attached is called the front side.

[0019] 3 to 5, the fixing device 10 includes, for example, a plurality of first fixing units 1 and a plurality of second fixing units 2. The plurality of first fixing units 1 and the plurality of second fixing units 2 are provided so as to be fixed to the same radiator 102. The plurality of first fixing units 1 are arranged at positions farther from the tank 101 than the plurality of second fixing units 2.

[0020] Each of the plurality of first fixing units 1 includes a first set of clamping portions 11 and 12, a first connecting portion 13, a first positioning portion 14, a second positioning portion 15, and a first fixing portion 16.

[0021] The first set of clamping portions 11, 12 includes a first clamping portion 11 and a second clamping portion 12. The first clamping portion 11 is provided so as to contact one end in the Y direction of each of a first fin 106A and a second fin 106B arbitrarily selected from the multiple fins 106 included in one heat sink 102. The first fin 106A and the second fin 106B are adjacent to each other in the X direction, for example. The second clamping portion 12 is provided so as to contact the other end in the Y direction of each of the first fin 106A and the second fin 106B.

[0022] 3, among the multiple fins 106 included in one heat sink 102, the fin arranged on the opposite side of the first fin 106A from the second fin 106B is referred to as fin 106E, and the fin arranged on the opposite side of the second fin 106B from the first fin 106A is referred to as fin 106F. Each of first clamping portion 11 and second clamping portion 12 has a portion inserted between first fin 106A and fin 106E in the X direction, and a portion inserted between second fin 106B and fin 106F.

[0023] As shown in FIG. 3, the first pair of clamping portions 11, 12 are arranged to sandwich the first fin 106A and the second fin 106B from the Y direction.

[0024] The first clamping portion 11 has a through hole 11A formed therein, through which the first end portion 13A of the first connecting portion 13 passes. The second clamping portion 12 has a through hole 12A formed therein, through which the second end portion 13B of the first connecting portion 13 passes.

[0025] The first connecting portion 13 connects the first clamping portion 11 and the second clamping portion 12. The first connecting portion 13 has a first end portion 13A connected to the first clamping portion 11, a second end portion 13B connected to the second clamping portion 12, and a first intermediate portion 13C connecting the first end portion 13A and the second end portion 13B and passing between the first fin 106A and the second fin 106B. The first connecting portion 13 is, for example, a rod-shaped or tubular member. The first connecting portion 13 is disposed so that its central axis is aligned with the Y direction. The length of the first intermediate portion 13C in the extension direction is equal to or greater than the lengths of the first fin 106A and the second fin 106B in the Y direction.

[0026] The first positioning unit 14 is a member for positioning the first clamping unit 11 relative to the first end 13A. The first positioning unit 14 can switch between a state in which the first clamping unit 11 and the first end 13A, which are configured as separate members, are connected, and a state in which the first clamping unit 11 and the first end 13A are not connected. The first positioning unit 14 is provided to screw into the first end 13A. The first end 13A is configured as, for example, a male screw. The first positioning unit 14 is configured as, for example, a female screw. Note that the first end 13A may be configured as a female screw, and the first positioning unit 14 may be configured as a male screw.

[0027] The second positioning part 15 is a member for positioning the second clamping part 12 relative to the second end part 13B. The second positioning part 15 can switch between a state in which the second clamping part 12 and the second end part 13B, which are configured as separate members, are connected, and a state in which the second clamping part 12 and the second end part 13B are not connected. The second positioning part 15 is provided to be screwed into the second end part 13B. The second end part 13B is configured as, for example, a male screw. The second positioning part 15 is configured as, for example, a female screw. Note that the second end part 13B may be configured as a female screw, and the second positioning part 15 may be configured as a male screw.

[0028] The first fixing portion 16 is a member for fixing the instrument mounting plate 108 to the heat sink 102. The first fixing portion 16 is attached to the second clamping portion 12. The first fixing portion 16 is provided, for example, as one unit with the second clamping portion 12. The second clamping portion 12 and the first fixing portion 16 are molded, for example, as the same member.

[0029] The first fixing portion 16 has a first protruding portion 16A that protrudes forward from the second clamping portion 12 in the Y direction. The first protruding portion 16A protrudes, for example, forward of the second end portion 13B of the first connecting portion 13 and the second positioning portion 15 in the Y direction. The first protruding portion 16A has, for example, an XZ plane that extends along both the X direction and the Z direction. The first protruding portion 16A is disposed, for example, at a position farther from the tank 101 than the first connecting portion 13.

[0030] A hole 17 is formed in the first protruding portion 16A. The hole 17 is formed so that a fixing member (not shown) for fixing the instrument mounting plate 108 to the first fixing portion 16 can be inserted therein. The hole 17 is, for example, a through hole through which a bolt (not shown) is inserted, or a screw hole that screws into a bolt (not shown). The axis of the hole 17 is aligned along the Y direction.

[0031] Each of the multiple second fixing units 2 has, for example, the same configuration as the first fixing unit 1. Each of the multiple second fixing units 2 includes a second set of clamping portions 21 and 22, a second connecting portion 23, a third positioning portion 24, a fourth positioning portion 25, and a second fixing portion 26.

[0032] The third clamping portion 21 is provided to sandwich, from the X direction, one end in the Y direction of each of the third fin 106C and the fourth fin 106D, which are arbitrarily selected from the multiple fins 106 included in one heat sink 102. The third fin 106C and the fourth fin 106D are arranged at intervals in the X direction from the first fin 106A and the second fin 106B, respectively. The third fin 106C and the fourth fin 106D are adjacent to each other in the X direction, for example. The fourth clamping portion 22 is provided to sandwich, from the X direction, the other end in the Y direction of each of the third fin 106C and the fourth fin 106D.

[0033] 3, among the multiple fins 106 included in one heat sink 102, the fin arranged on the opposite side of the third fin 106C from the fourth fin 106D is referred to as fin 106G, and the fin arranged on the opposite side of the fourth fin 106D from the third fin 106C is referred to as fin 106H. Each of third clamping portion 21 and fourth clamping portion 22 has a portion inserted between the third fin 106C and fin 106G in the X direction, and a portion inserted between the fourth fin 106D and fin 106H.

[0034] As shown in FIG. 3, the second pair of clamping portions 21 and 22 are arranged to sandwich the third fin 106C and the fourth fin 106D from the Y direction.

[0035] The third clamping portion 21 has a through hole 21A formed therein, through which the third end 23A of the second connecting portion 23 passes. The fourth clamping portion 22 has a through hole 22A formed therein, through which the fourth end 23B of the second connecting portion 23 passes.

[0036] The second connecting portion 23 connects the third clamping portion 21 and the fourth clamping portion 22. The second connecting portion 23 has a third end portion 23A connected to the third clamping portion 21, a fourth end portion 23B connected to the fourth clamping portion 22, and a second intermediate portion 23C connecting the third end portion 23A and the fourth end portion 23B and passing between the third fin 106C and the fourth fin 106D. The second connecting portion 23 is, for example, a rod-shaped or tubular member. The second connecting portion 23 is disposed so that its central axis is along the Y direction. The length of the second intermediate portion 23C in the extension direction is equal to or greater than the lengths of the third fin 106C and the fourth fin 106D in the Y direction.

[0037] The third positioning portion 24 is a member for positioning the third clamping portion 21 relative to the third end portion 23A. The third positioning portion 24 can switch between a state in which the third clamping portion 21 and the third end portion 23A, which are configured as separate members, are connected, and a state in which the third clamping portion 21 and the third end portion 23A are not connected. The third positioning portion 24 is provided to be threadedly engaged with the third end portion 23A. The third end portion 23A is configured as, for example, a male screw. The third positioning portion 24 is configured as, for example, a female screw. Note that the third end portion 23A may be configured as a female screw, and the third positioning portion 24 may be configured as a male screw.

[0038] The fourth positioning portion 25 is a member for positioning the fourth clamping portion 22 with respect to the fourth end portion 23B. The fourth positioning portion 25 can switch between a state in which the fourth clamping portion 22 and the fourth end portion 23B, which are configured as separate members, are connected, and a state in which the fourth clamping portion 22 and the fourth end portion 23B are not connected. The fourth positioning portion 25 is provided to be screwed into the fourth end portion 23B. The fourth end portion 23B is configured as, for example, a male screw. The fourth positioning portion 25 is configured as, for example, a female screw. Note that the fourth end portion 23B may be configured as a female screw, and the fourth positioning portion 25 may be configured as a male screw.

[0039] The second fixing portion 26 is a member for fixing the instrument mounting plate 108 to the heat sink 102. The second fixing portion 26 is attached to the fourth clamping portion 22. The second fixing portion 26 is provided, for example, as one piece with the fourth clamping portion 22. The fourth clamping portion 22 and the second fixing portion 26 are molded, for example, as the same member.

[0040] The second fixing portion 26 has a second protruding portion 26A that protrudes forward from the fourth clamping portion 22 in the Y direction. The second protruding portion 26A protrudes, for example, forward of the fourth end portion 23B of the second connecting portion 23 and the fourth positioning portion 25 in the Y direction. The second protruding portion 26A has, for example, an XZ plane that extends along both the X direction and the Z direction. The second protruding portion 26A is disposed, for example, closer to the tank 101 than the second connecting portion 23.

[0041] A hole 27 is formed in the second protruding portion 26A. The hole 27 is formed so that a fixing member (not shown) for fixing the instrument mounting plate 108 to the second fixing portion 26 can be inserted therein. The hole 27 is, for example, a through hole through which a bolt (not shown) is inserted, or a screw hole that screws into a bolt (not shown). The hole axis of the hole 27 is along the Y direction. The XZ planes of the first protruding portion 16A of the first fixing portion 16 and the second protruding portion 26A of the second fixing portion 26 are formed to be, for example, coplanar with each other.

[0042] The shapes and dimensions of the first set of clamping portions 11, 12, the first connecting portion 13, the first positioning portion 14, the second positioning portion 15, the first fixing portion 16, the second set of clamping portions 21, 22, the second connecting portion 23, the third positioning portion 24, the fourth positioning portion 25, and the second fixing portion 26 are not particularly limited.

[0043] <Action and effect> 3 to 5 is fixed to the heat sink 102 by sequentially fixing each of the plurality of first fixing units 1 and each of the plurality of second fixing units 2 to each of the plurality of fins 106. Each of the plurality of first fixing units 1 is fixed to the heat sink 102 by holding the first fin 106A and the second fin 106B between the first set of clamping portions 11 and 12 by the first connecting portion 13, the first positioning portion 14, and the second positioning portion 15. Each of the plurality of second fixing units 2 is fixed to the heat sink 102 by holding the third fin 106C and the fourth fin 106D between the second set of clamping portions 21 and 22 by the second connecting portion 23, the third positioning portion 24, and the fourth positioning portion 25.

[0044] Each of first clamping portion 11 and second clamping portion 12 is provided to clamp, from the X direction, one end in the Y direction of each of first fin 106A and second fin 106B that are arbitrarily selected from the plurality of fins 106 included in one heatsink 102. First connecting portion 13 is provided to pass between the arbitrarily selected first fin 106A and second fin 106B. Therefore, first fixing unit 1 can be attached to and detached from one heatsink 102 at any position.

[0045] Each of the third clamping portion 21 and the fourth clamping portion 22 is provided to clamp, from the X direction, one end in the Y direction of each of a third fin 106C and a fourth fin 106D that are arbitrarily selected from the plurality of fins 106 included in one heatsink 102. The second connecting portion 23 is provided to pass between the arbitrarily selected third fin 106C and fourth fin 106D. Therefore, like the first fixing unit 1, the second fixing unit 2 can be attached and detached to any position on one heatsink 102. In other words, the fixing device 10 is provided to detachably fix the instrument mounting plate 108 to any position on one heatsink 102.

[0046] Furthermore, in the transformer 100, since each of the multiple heat sinks 102 has the same configuration, each of the first fixing unit 1 and the second fixing unit 2 can be attached and detached to any position on the multiple heat sinks 102. In other words, the fixing device 10 is provided so as to detachably fix the instrument mounting plate 108 to any position on the multiple heat sinks 102.

[0047] The instrument mounting plate 108 is fixed to the heat sink 102 by being fixed to each of the multiple first protruding portions 16A and multiple second protruding portions 26A of the fixing device 10 fixed to the heat sink 102 as described above.

[0048] Therefore, in the transformer 100, the arrangement of the instrument mounting plate 108 can be changed relatively easily by attaching or detaching the fixing device 10 to any one of the plurality of heat sinks 102.

[0049] Depending on the structure of the transformer 100, the structure of the transformer, and the connection structure between the transformer and other devices disposed around it, the instrument mounting plate 108 may need to be located away from the tank 101 so that the manager can easily check it. In this case, the fixing device that fixes the instrument mounting plate 108 to the tank 101 is relatively long and requires a relatively strong structure in consideration of resonance with shocks or vibrations that may be applied during transportation of the transformer. In contrast, the fixing device 10 is shorter than the fixing device that fixes the instrument mounting plate 108 to the tank 101 and does not necessarily require a strong structure in consideration of resonance with shocks or vibrations that may be applied during transportation of the transformer, thereby reducing manufacturing costs.

[0050] The fixing device 10 includes a first fixing unit 1 and a second fixing unit 2. In such a fixing device 10, the first fixing unit 1 and the second fixing unit 2 can be used to fix one instrument mounting plate 108. In this case, the fixing device 10 can fix the instrument mounting plate 108 to the heat sink 102 more stably. In such a fixing device 10, the first fixing unit 1 and the second fixing unit 2 can be used to fix different instrument mounting plates 108. In this case, the fixing device 10 can fix multiple instrument mounting plates 108 to the heat sink 102.

[0051] It is sufficient that the fixing device 10 includes at least one first fixing unit 1. As shown in FIG.

[0052] Embodiment 2 7 to 9, transformer 200 according to the second embodiment has a configuration basically similar to that of transformer 100 according to the first embodiment, but differs from transformer 100 in that fixing device 30 of instrument mounting plate 108 includes first fixing device 31 fixed to first radiator 102A1 and second fixing device 32 fixed to second radiator 102B1. In this embodiment, in the plan views of FIGS. 7 and 9, the lower side as viewed in the plane of the paper is called the front (front) side, and the opposite side is called the rear side.

[0053] The first heat sink 102A1 is arranged, for example, on the front side in the Y direction among the first group of heat sinks 102A. The second heat sink 102B1 is arranged, for example, on the front side in the Y direction among the first group of heat sinks 102B.

[0054] The fixing device 30 includes, for example, a plurality of first fixing devices 31 and a plurality of second fixing devices 32.

[0055] Each of the multiple first fixing devices 31 is fixed to the first heat sink 102A1. Each of the multiple second fixing devices 32 is fixed to the second heat sink 102B1. Each of the multiple first fixing devices 31 and the multiple second fixing devices 32 may be fixed to the first heat sink 102A1 or the second heat sink 102B2 by any fixing method, for example, welding. Each of the multiple first fixing devices 31 and the multiple second fixing devices 32 is fixed to at least one fin 106, for example. Note that each of the multiple first fixing devices 31 and the multiple second fixing devices 32 may be fixed to each of the multiple fins 106. Each of the multiple first fixing devices 31 and the multiple second fixing devices 32 may be fixed to the reinforcing member.

[0056] The plurality of first fixing devices 31 are arranged, for example, at intervals from one another in the X direction and at intervals from one another in the Z direction. Note that it is sufficient that the plurality of first fixing devices 31 are arranged at intervals from one another in at least either the X direction or the Z direction.

[0057] Each of the first fixing devices 31 has a third protruding portion 31A that protrudes forward from the first heat sink 102A1 in the Y direction. The third protruding portion 31A has a mounting surface to which an instrument mounting plate is attached. The mounting surface is, for example, an XZ plane that extends along both the X and Z directions.

[0058] A hole 33 is formed in the third protruding portion 31A. The hole 33 is formed so that a fixing member (not shown) for fixing the instrument mounting plate 108 to the first fixing device 31 can be inserted therein. The hole 33 is, for example, a through hole through which a bolt (not shown) is inserted, or a screw hole that screws into a bolt (not shown). The axis of the hole 33 is aligned along the Y direction.

[0059] The plurality of second fixing devices 32 are arranged, for example, at intervals from one another in the X direction and at intervals from one another in the Z direction. Note that it is sufficient that the plurality of second fixing devices 32 are arranged at intervals from one another in at least either the X direction or the Z direction.

[0060] Each of the second fixing devices 32 has a fourth protruding portion 32A that protrudes forward from the second heat sink 102B1 in the Y direction. The fourth protruding portion 32A has a mounting surface to which an instrument mounting plate is attached. The mounting surface has, for example, an XZ plane extending along both the X and Z directions. The mounting surface of each of the second fixing devices 32 faces, for example, in the same direction as the mounting surface of each of the first fixing devices 31.

[0061] A hole 34 is formed in the fourth protruding portion 32A. The hole 34 is formed so that a fixing member (not shown) for fixing the instrument mounting plate 108 to the second fixing device 32 can be inserted into the hole 34. The hole 34 is, for example, a through hole through which a bolt (not shown) is inserted, or a screw hole that screws into a bolt (not shown). The axis of the hole 34 is aligned along the Y direction.

[0062] In the transformer 200, the tank 101 and the multiple radiators 102 have rotational symmetry when viewed from the Z direction (in a plan view), for example. When the transformer 200 is viewed from the Z direction, an axis that passes through the centers of the tank 101 and the multiple radiators 102 and extends in the Z direction is defined as a central axis C of the transformer 200. The tank 101 and the multiple radiators 102 have, for example, 180-degree rotational symmetry with respect to the central axis C. In other words, the tank 101 and the multiple radiators 102 have, for example, two-fold rotational symmetry with respect to the central axis C. Note that the tank 101 and the multiple radiators 102 do not necessarily have the above rotational symmetry when viewed from the Z direction (in a plan view).

[0063] 9 is realized in the transformer 200 when the tank 101 and the multiple radiators 102 shown in Fig. 7 are rotated 180° around the central axis C. In the state shown in Fig. 7, the first radiator 102A1 and the second radiator 102B1 are disposed on the front side of the transformer 200, and therefore the first fixing device 31, the second fixing device 32, and the instrument mounting plate 108 are also disposed on the front side of the transformer 200.

[0064] 9, the first heat sink 102A1 and the second heat sink 102B1 are disposed on the rear side of the transformer 200, and therefore the first fixing device 31, the second fixing device 32, and the instrument mounting plate 108 are disposed on the rear side of the transformer 200. The instrument mounting plate 108 can be fixed to at least one of the first fixing device 31 and the second fixing device 32 in each of the states shown in FIGS.

[0065] That is, in the transformer 200, it is possible to easily switch between a state in which the instrument mounting plate 108 is fixed to the first fixing device 31, a state in which the instrument mounting plate 108 is fixed to the second fixing device 32, and a state in which one instrument mounting plate 108 is fixed to the first fixing device 31 and another instrument mounting plate 108 is fixed to each of the second fixing devices 32, without attaching or detaching the fixing device 30 from the transformer 200. Therefore, in the transformer 200, the degree of freedom in changing the arrangement of the instrument mounting plate 108 is higher than in a transformer having a fixing device consisting of only the first fixing device 31.

[0066] Furthermore, in the transformer 200, the arrangement of the instrument mounting plate 108 fixed to the transformer 200 by the fixing device 30 can be changed without attaching or detaching the fixing device 30, simply by rotating the transformer 200, for example, 180° around the central axis C. That is, in the transformer 200, the instrument mounting plate 108 can be fixed only to the first fixing device 31 or the second fixing device 32, but by switching between the state shown in Fig. 7 and the state shown in Fig. 9, the instrument mounting plate 108 can be fixed to one of a total of four faces of the multiple heat sinks 102, namely, two faces facing the front side in the Y direction and two faces facing the rear side.

[0067] Therefore, the degree of freedom in changing the position of the instrument mounting plate 108 in the transformer 200 is increased compared to a transformer that has a fixing device 30 but in which the tank 101 and multiple radiators 102 do not have rotational symmetry around the central axis C.

[0068] The transformer 200 can be modified as follows.

[0069] The fixing device 30 may include at least one first fixing device 31 and at least one second fixing device 32. As shown in Fig. 10, the fixing device 30 may be composed of only one first fixing device 31 and one second fixing device 32. Alternatively, as shown in Fig. 11, the fixing device 30 may be composed of a plurality of first fixing devices 31 and one second fixing device 32.

[0070] The plurality of heat radiators 102 may include at least a first heat radiator and a second heat radiator. The plurality of heat radiators 102 may be composed of only the first group of heat radiators 102A or the second group of heat radiators 102B. As shown in Fig. 11, the number of the first group of heat radiators 102A may be different from the number of the second group of heat radiators 102B. In other words, the tank 101 and the plurality of heat radiators 102 may not have the above-mentioned rotational symmetry when viewed from the Z direction.

[0071] The first heat sink to which the first fixing device 31 is fixed and the second heat sink to which the second fixing device 32 is fixed may be arbitrarily selected from the plurality of heat sinks 102. For example, both the first heat sink and the second heat sink may be selected from the first group of heat sinks 102A. As shown in FIG. 11 , the first heat sink 102A1 may be disposed at the frontmost position among the first group of heat sinks 102A. The second heat sink 102A3 may be disposed at the rearmost position among the first group of heat sinks 102A.

[0072] The first fixing device 31 may be fixed to any part of the first heatsink. The second fixing device 32 may be fixed to any part of the second heatsink. For example, as shown in FIG. 11 , the second fixing device 32 may be fixed to a side surface of the second heatsink 102A3 facing the X direction. The side surface of the second heatsink 102A3 facing the X direction may be the surface of the fin 106, or the surface of the upper header 104 or the lower header.

[0073] The mounting surface of each of the multiple second fixing devices 32 may face a different direction from the mounting surface of each of the multiple first fixing devices 31. For example, as shown in Fig. 11, when the mounting surface of the first fixing device 31 faces the Y direction, the mounting surface of the second fixing device 32 may face the X direction.

[0074] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. Unless there is a contradiction, at least two of the embodiments disclosed herein may be combined. The scope of the present disclosure is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0075] 1 First fixing unit, 2 Second fixing unit, 10,30 Fixing device, 11 First clamping part, 11A, 12A, 21A, 22A Through hole, 12 Second clamping part, 13 First connection part, 13A First end part, 13B Second end part, 13C First intermediate part, 14 First positioning part, 15 Second positioning part, 16 First fixing part, 16A First protruding part, 17,27,33,34 Hole, 21 Third clamping part, 22 Fourth clamping part, 23 Second connecting part, 23A Third end, 23B Fourth end, 23C Second intermediate part, 24 Third positioning part, 25 Fourth positioning part, 26 Second fixing part, 26A Second protrusion part, 31 First fixing device, 31A Third protrusion part, 32 2nd fixation device, 32A 4th protrusion, 100,200 Transformer, 101 tank, 101A transformer body, 102, 102A, 102B radiators, 102A1 first radiator, 102B1, 102A2 second radiator, 103 bushing, 104 upper header, 105 lower header, 106 fins, 106A first fin, 106B second fin, 106C third fin, 106D fourth fin, 107 reinforcing member, 108 instrument mounting plate.

Claims

1. A fixing device for an instrument mounting plate for a transformer including a tank that houses a transformer body and is filled with an insulating medium, and a heat sink that includes a plurality of fins that are spaced apart from one another in a first direction to cool the insulating medium, the fixing device being for fixing an instrument mounting plate, on which instruments are mounted, to the transformer, the device comprising: a first fixing unit; The first fixed unit is a first set of clamping portions arranged to sandwich at least a first fin and a second fin of the plurality of fins from a second direction intersecting the first direction; a first connecting portion having a first end portion connected to one of the first set of clamping portions, a second end portion connected to the other of the first set of clamping portions, and a first intermediate portion connecting between the first end portion and the second end portion and passing between the first fin and the second fin; a first positioning portion for positioning one of the first pair of clamping portions relative to the first end portion of the first connection portion; a second positioning portion for positioning the other of the first pair of clamping portions relative to the second end portion of the first connection portion; a first fixing portion attached to the other of the first set of clamping portions for fixing the instrument mounting plate.

2. a second fixing unit disposed at an interval from the first fixing unit in the first direction; The second fixing unit is a second set of clamping portions arranged to sandwich, from the second direction, third and fourth fins that are arranged at intervals in the first direction from the first and second fins of the plurality of fins; a second connecting portion having a third end portion connected to one of the clamping portions of the second set, a fourth end portion connected to the other of the clamping portions of the second set, and a second intermediate portion connecting between the third end portion and the fourth end portion and passing between the third fin and the fourth fin; a third positioning portion for positioning one of the second pair of clamping portions relative to the third end portion of the second connection portion; a fourth positioning portion for positioning the other of the second pair of clamping portions relative to the fourth end portion of the second connection portion; 2. The instrument mounting plate fixing device according to claim 1, further comprising: a second fixing portion attached to the other of said second set of clamping portions for fixing said instrument mounting plate.

3. Each of the first set of clamping portions has a through hole formed therein through which the first end portion or the second end portion of the first connecting portion is passed, the first positioning portion is provided to be screwed onto the first end portion of the first connection portion, 3. The instrument mounting plate fixing device according to claim 1, wherein the second positioning portion is provided so as to be screwed onto the second end portion of the first connecting portion.

4. a tank containing the transformer body and filled with an insulating medium; a first radiator and a second radiator for cooling the insulating medium; a first fixing device for fixing an instrument mounting plate on which an instrument is mounted to the first heat sink; a second fixing device for fixing the instrument mounting plate to the second radiator; A transformer that is switchable among a state in which the meter mounting plate is fixed to the first fixing device, a state in which the meter mounting plate is fixed to the second fixing device, and a state in which the meter mounting plate is fixed to the first fixing device and another meter mounting plate other than the meter mounting plate is fixed to the second fixing device.

5. each of the first and second fixing devices has a mounting surface to which the instrument mounting plate is attached; The transformer of claim 4 , wherein the mounting surfaces of the first and second fixing devices face in the same direction as each other.

6. each of the first and second fixing devices has a mounting surface to which the instrument mounting plate is attached; The transformer of claim 4 , wherein the mounting surfaces of the first and second fixing devices face in different directions.

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