JP2017168544A - Stationary induction apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat exchange efficiency of a heat radiator, while making the slave board side connector compact, in a transformer where a radiator is placed substantially horizontally.SOLUTION: A natural convection transformer 1 includes a transformer body 4 having an iron core 2 and a winding 3 wound therearound, a rectangular prism tank 6 housing the transformer body together with insulation oil 5, and panel radiators 9A, 9B, 9C, 9D of first to fourth stages placed on the rear wall 6d of this tank. In the radiators 9A, 9C of first and third stages, the insulation oil flows in a first direction by natural convection. In the radiators 9B, 9D of second and fourth stages, the insulation oil 5 flows in a second direction, opposite to the first direction, by natural convection. Consequently, in the entire heat radiator, the insulation oil flows alternately in the order of first direction, second direction, first direction and second direction. With such an arrangement, heat exchange efficiency of the heat radiator is improved, and the heat radiator is made compact.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stationary induction device provided with a convection-type heat radiating device in which heat radiators are arranged substantially horizontally.

  In Patent Document 1, a transformer body is housed in a tank together with insulating oil serving as a cooling medium, and a plurality of panel radiators stacked in the vertical direction on the side of the tank as a heat radiating device through which the insulating oil circulates. It has. In this heat radiating device, oil introduced into a plurality of panels from the tank flows in the same direction in each panel.

Japanese Utility Model Publication No. 62-142818

  Since the high temperature oil introduced into each panel decreases in temperature as it flows through the panel, in the radiator of Patent Document 1, the high temperature portion of the radiator into which the relatively high temperature oil from the tank is introduced is in the vertical direction. On the other hand, the low temperature part of the radiator from which oil is led out at a relatively low temperature is located side by side in the vertical direction. For this reason, the temperature distribution is biased in the entire heat dissipation device. Thereby, the heat exchange efficiency of the heat radiating device is lowered, and a large heat radiating device is required in order to secure a necessary heat radiation amount.

  In the present invention, the stationary guidance device is a stationary guidance device main body, a tank that houses the stationary guidance device main body and the cooling insulating medium, the tank that is disposed on a side surface of the tank, and has an inlet at a relatively upper side. A first radiator connected to an upper portion of the tank and having an outlet at the other end relatively connected to a lower portion of the tank, and a cooling insulating medium flows in a first direction by convection, and a side surface of the tank The tank is disposed adjacent to the first radiator in the vertical direction, the outlet of one end is connected to the lower part of the tank which is relatively lower, and the inlet of the other end is relatively upper A second radiator that is connected to an upper portion of the first heat sink and flows in a second direction opposite to the first direction by convection.

  That is, the cooling insulating medium in the first radiator and the cooling insulating medium in the second radiator flow in opposite directions.

  According to the present invention, at one end, the high temperature portion of the first radiator and the low temperature portion of the second radiator are adjacent to each other in the vertical direction, and at the other end, the low temperature portion of the first radiator. Since the high-temperature part of the second radiator is adjacent to each other in the vertical direction, the temperature distribution of the radiator is not biased as the entire radiator including the first radiator and the second radiator. Thereby, the heat exchange efficiency of the heat radiating device is improved, and therefore the heat radiating device can be miniaturized.

It is a top view which shows the transformer of one Example. It is a rear view of the transformer of FIG. It is a right view of the transformer of FIG. It is a left view of the transformer of FIG. It is a top view which shows the transformer of a 2nd Example. It is explanatory drawing which shows the connection relation of the tank and heat radiating device in a 2nd Example.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a natural convection type transformer (stationary induction device) 1 in one embodiment applied to various power facilities and the like. The transformer 1 includes, for example, a transformer body (stationary induction device body) 4 having an iron core 2 made of an amorphous magnetic material and a winding 3 wound around the iron core 2, and a liquid cooling insulating medium 5 such as insulating oil. A rectangular parallelepiped tank 6 that houses the transformer body 4 and a heat radiating device 7 disposed outside the tank 6 are provided.

  The tank 6 is made of a metal material, for example, a normal steel plate, and has a ceiling wall 6a, a bottom wall 6b, a front wall 6c, a rear wall 6d, and two side walls 6e and 6f. A heat radiating device 7 is disposed on the rear wall 6 d of the tank 6. Here, the rear wall 6d of the tank 6 corresponds to a “side surface of the tank” in the claims. The heat radiating device 7 may be disposed in the vicinity of the front wall 6c and the side walls 6e and 6f.

  The heat dissipation device 7 includes four panel radiators 9 (9A, 9B, 9C, 9D) in which a plurality of flat panels 8 are stacked. The four panel radiators 9 are configured in substantially the same manner, and the elongated panels 8 of each radiator 9 are configured to extend horizontally as shown in FIG. Each panel 8 is disposed so as to be parallel to the rear wall 6 d of the tank 6. The panel 8 is formed hollow so that the insulating oil 5 flows. Here, as shown in FIG. 2, the four radiators 9A, 9B, 9C, and 9D are arranged in order from the top, the first radiator 9A, the second radiator 9B, and the third radiator. 9C is a fourth-stage radiator 9D. The first-stage radiator 9A has an inlet 10A at the left end in FIG. 2, and an outlet 11A at the right end in FIG. Conversely, the second-stage radiator 9B has an inlet 10B at the right end of FIG. 2, and has an outlet 11B at the left end of FIG. Similarly to the first-stage radiator 9A, the third-stage radiator 9C has an inlet 10C at the left end in FIG. 2, and an outlet 11C at the right end in FIG. Similarly to the second-stage radiator 9B, the fourth-stage radiator 9D has an inlet 10D at the right end in FIG. 2, and an outlet 11D at the left end in FIG. The inlets 10A, 10B, 10C, and 10D are collectively referred to as “inlet 10”, and the outlets 11A, 11B, 11C, and 11D are collectively referred to as “exit 11”. Further, the alphabets of the inlets 10A, 10B, 10C, 10D and the outlets 11A, 11B, 11C, 11D correspond to the radiators 9A, 9B, 9C, 9D, respectively.

  Accordingly, the transformer 1 has the radiators 9A and 9C having the inlet 10 at the left end of FIG. 2 and the outlet 11 at the right end of FIG. 2, the outlet 11 at the left end of FIG. The radiators 9B and 9D having the inlet 10 at the right end in FIG. 2 are alternately arranged in the vertical direction. Here, the radiators 9A and 9C correspond to the “first radiator” described in the claims, and the radiators 9B and 9D correspond to the “second radiator” described in the claims. Equivalent to.

  The leftmost inlet 10A of FIG. 2 of the first-stage radiator 9A is relative to the introduction common pipe (first introduction common pipe) 12 and the pipe 13 branched from the introduction common pipe 12 (see FIG. 3). It is connected to the upper part of the tank 6 that is located upward. On the other hand, an outlet 11A at the right end of FIG. 2 of the first stage radiator 9A is a common pipe for derivation (first derivation common pipe) 14 and a pipe 15 branched from the common pipe for derivation 14 (see FIG. 4). Is connected to the lower part of the tank 6 which is relatively lower.

  The inlet 10B at the right end of FIG. 2 of the second-stage radiator 9B is relative to the introduction common pipe (second introduction common pipe) 16 and the pipe 17 branched from the introduction common pipe 16 (see FIG. 4). It is connected to the upper part of the tank 6 that is located upward. On the other hand, the outlet 11B at the left end of FIG. 2 of the second-stage radiator 9B is a derivation common pipe (second derivation common pipe) 18 and a pipe 19 branched from the derivation common pipe 18 (see FIG. 3). Is connected to the lower part of the tank 6 which is relatively lower.

  An inlet 10C at the left end of FIG. 2 of the third-stage radiator 9C is an upper portion of the tank 6 that is relatively above the introduction common pipe 12 and a pipe 20 (see FIG. 3) branched from the introduction common pipe 12. It is connected to the. On the other hand, the outlet 11C at the right end of FIG. 2 of the third-stage radiator 9C is a tank 6 which is relatively lower by a lead-out common pipe 14 and a pipe 21 branched from the lead-out common pipe 14 (see FIG. 4). Connected to the bottom of the.

  The rightmost inlet 10D of FIG. 2 of the fourth-stage radiator 9D is an upper portion of the tank 6 that is relatively above the introduction common pipe 16 and the pipe 22 (see FIG. 4) branched from the introduction common pipe 16. It is connected to the. On the other hand, the outlet 11D at the left end of FIG. 2 of the fourth-stage radiator 9D is a tank 6 which is relatively below by the lead-out common pipe 18 and the pipe 23 branched from the lead-out common pipe 18 (see FIG. 3). Connected to the bottom of the.

  In the transformer 1, the temperature difference between the upper and lower insulating oils 5 in the tank 6 is generated due to the heat generated by the transformer body 4 by energization, so that the relatively high temperature insulating oil 5 is converted into a tank by natural convection. 6 flows into the first and third stage radiators 9A and 9C through the introduction common pipe 12 and the pipes 13 and 20 on the left end side in FIG. 2 of the heat radiating device 7, and on the right end side in FIG. It flows into the second-stage and fourth-stage radiators 9B, 9D through the introduction common pipe 16 and the pipes 17, 22. In the first-stage and third-stage radiators 9A and 9C, the insulating oil 5 enters a plurality of stacked panels 8 (see FIGS. 1, 3 and 4), and is leftward in FIG. 2 by natural convection. Flows in parallel with the first direction D1 from the inlets 10A and 10C toward the outlets 11A and 11C at the right end of FIG. On the other hand, in the second-stage and fourth-stage radiators 9B and 9D, the insulating oil 5 enters the plurality of stacked panels 8 and is in a second direction D2 opposite to the first direction D1 by natural convection. Flowing in parallel. Therefore, in the heat dissipation device 7 as a whole, the insulating oil 5 is in the order of the first direction D1, the second direction D2, the first direction D1, and the second direction D2, as shown in FIG. Flows alternately. The insulating oil 5 flowing through the first and third stage radiators 9A and 9C and the second and fourth stage radiators 9B and 9D is cooled by exchanging heat with the outside air. The relatively low-temperature insulating oil 5 after cooling from the first-stage and third-stage radiators 9A, 9C is supplied to the tank 6 from the outlets 11A, 11C at the right end of FIG. Return to the bottom of. The relatively low temperature insulating oil 5 from the second-stage and fourth-stage radiators 9B, 9D passes through the outlet 11B, 11D on the left end side of FIG. Return to.

  As described above, in this embodiment, at the left and right ends, the first stage and third stage radiators 9A and 9C into which the high-temperature insulating oil 5 from the tank 6 is introduced are cooled. A high temperature portion of the second and fourth radiators 9B and 9D is adjacent to the low temperature portion (exit) from which the later low temperature insulating oil 5 is led out in the vertical direction, and the other end is connected to the first step and the second step. Adjacent to the low temperature part of the three-stage radiators 9A and 9C in the vertical direction. Therefore, the temperature distribution of the heat radiating device 7 is not biased as a whole of the heat radiating device 7 including the first to fourth stage heat radiators 9A, 9B, 9C, 9D. Thereby, the heat exchange efficiency of the heat radiating device 7 is improved, and thus the heat radiating device 7 can be downsized.

  FIG. 5 shows a second embodiment of the transformer 1 of the present invention. In the second embodiment, a partition having a T-shaped cross section extending in the vertical direction of the tank 6 is provided at two corners (first and second corners) 24 and 25 of the rectangular parallelepiped tank 6 adjacent to the heat dissipation device 7. Plates (first and second partition plates) 26 and 27 are provided, respectively. Accordingly, a first passage 28 having a triangular section and a second passage 29 having a triangular section are formed in the corner portion 24 on the left side of FIG. 5, while the corner portion 25 on the right side in FIG. A triangular third passage 30 and a fourth passage 31 that is also triangular in cross section are formed. The first to fourth passages 28, 29, 30, and 31 in the tank 6 are connected to the heat radiating device 7 by eight pipes 32, 33, 34, 35, 36, 37, 38, and 39 that extend substantially horizontally. ing.

  Here, in order to make the connection relationship between the tank 6 and the heat radiating device 7 easy to understand, an explanatory diagram in which the first and second passages 28 and 29 and the third and fourth passages 30 and 31 are developed is shown as insulating oil. It is shown in FIG.

  As shown in FIG. 6, in the left corner 24, the first passage 28 extends from the ceiling wall 6 a of the tank 6 to an intermediate wall 40 provided at the center in the vertical direction of the tank 6. The first passage 28 includes a rectangular inlet 41 for introducing the high-temperature insulating oil 5 warmed by the transformer body 4 in the vicinity of the ceiling wall 6a.

  A second passage 29 adjacent to the first passage 28 extends from the ceiling wall 6a of the tank 6 to the bottom wall 6b. In the vicinity of the bottom wall 6b, the second passage 29 has a rectangular shape that guides the low-temperature insulating oil 5 cooled by the heat radiating device 7 to the lower portion of the tank 6 (specifically, portions other than the passages 28, 29, 30, 31). The outlet 42 is provided.

  On the other hand, in the right corner 25, the third passage 30 extends from the ceiling wall 6 a of the tank 6 to the intermediate wall 43 provided below the vertical position of the intermediate wall 40 in the first passage 28. It extends. The third passage 30 includes a rectangular inlet 44 for introducing the high-temperature insulating oil 5 in the vicinity of the ceiling wall 6a.

  The fourth passage 31 adjacent to the third passage 30 extends from the ceiling wall 6a of the tank 6 to the bottom wall 6b. The fourth passage 31 is a rectangular guide that guides the low-temperature insulating oil 5 from the heat radiating device 7 to the lower portion of the tank 6 (specifically, portions other than the passages 28, 29, 30, 31) near the bottom wall 6b. An outlet 45 is provided.

  An inlet 10A at the left end in FIG. 5 of the first stage radiator 9A is connected to the upper portion of the first passage 28 in the tank 6 by a pipe 32, and an outlet 11A at the right end in FIG. The upper part of the fourth passage 31 is connected by a pipe 33.

  An inlet 10B at the right end of FIG. 5 of the second-stage radiator 9B is connected to the upper portion of the third passage 30 in the tank 6 by a pipe 34, and an outlet 11B at the left end of FIG. The second passage 29 is connected by a pipe 35 in the vicinity of the upper portion thereof.

  5C of the third stage radiator 9C is connected to the lower part of the first passage 28 in the tank 6 by a pipe 36, and the outlet 11C of the right end of FIG. Near the center of the fourth passage 31 is connected by a pipe 37.

  The right end inlet 10D of FIG. 5 of the fourth stage radiator 9D is connected to the lower portion of the third passage 30 in the tank 6 by a pipe 38, and the left end outlet 11D of FIG. The second passage 29 is connected by a pipe 39 above the outlet 42.

  The inlets 10A, 10C of the first-stage and third-stage radiators 9A, 9C communicate with the inlet 41 at the top of the tank 6 through the pipes 32, 36 and the first passage 28, and further, the outlet 11A 11C communicates with the outlet 45 at the bottom of the tank 6 through the pipes 33, 37 and the fourth passage 31.

  Further, the inlets 10B, 10D of the second and fourth stage radiators 9B, 9D communicate with the inlet 44 at the upper part of the tank 6 through the pipes 34, 38 and the third passage 30, and The outlets 11 </ b> B and 11 </ b> D communicate with the outlet 42 at the bottom of the tank 6 through the pipes 35 and 39 and the second passage 29.

  Therefore, also in the second embodiment, the inlet 10 of the radiator 9 is connected to the upper part of the tank 6 which is relatively upper, and the outlet 11 is connected to the lower part of the tank 6 which is relatively lower. The structure which consists of can be substantially obtained. Therefore, the insulating oil 5 circulates in the transformer 1 by natural convection in the order of the tank 6, the heat dissipation device 7, and the tank 6.

  Further, the first passage 28 in the tank 6 is connected to the heat radiating device 7 through both the pipes 32 and 36, and the fourth passage 31 in the tank 6 radiates heat through both the pipes 33 and 37. Since it is connected to the device 7, the first passage 28 and the fourth passage 31 correspond to the introduction common pipe 12 and the lead-out common pipe 14 of the first embodiment, respectively.

  Similarly, the third passage 30 in the tank 6 is connected to the heat radiating device 7 through both the pipes 34 and 38, and the second passage 29 in the tank 6 is connected through both the pipes 35 and 39. Since it is connected to the heat dissipation device 7, the third passage 30 and the second passage 29 correspond to the introduction common pipe 16 and the lead-out common pipe 18 of the first embodiment, respectively.

  That is, the high-temperature insulating oil 5 enters the first passage 28 serving as a common pipe from the inlet 41 and branches into two flows and flows into the pipes 32 and 36. The low-temperature insulating oil 5 after cooling flows from the outlets 11A and 11C at the right end of FIG. 5 into the fourth passage 31 serving as a common pipe in the tank 6 through the pipes 33 and 37.

  Similarly, the high-temperature insulating oil 5 enters the third passage 30 serving as a common pipe in the tank 6 from the inlet 44 and branches into two flows and flows into the pipes 34 and 38. The low-temperature insulating oil 5 after cooling flows into the second passage 29 serving as a common pipe in the tank 6 through the pipes 35 and 39.

  Therefore, also in the second embodiment, in the heat dissipation device 7, the insulating oil 5 is in the order of the first direction D1, the second direction D2, the first direction D1, and the second direction D2 from the top to the bottom. Flows alternately.

  In the above embodiment, the first to fourth passages 28, 29, 30 and 31 corresponding to the common pipe are formed in the tank 6 by providing the simple partition plates 26 and 27 at the corners 24 and 25 of the tank 6. Therefore, a separate common pipe outside the tank 6 can be eliminated.

  In each of the above embodiments, there are two radiators 9A and 9C in which the insulating oil 5 flows in the first direction D1, and two radiators 9B and 9D in which the insulating oil 5 flows in the second direction D2. However, the number of radiators is arbitrary. For example, one radiator 9A in which the insulating oil 5 flows in the first direction D1 and the insulating oil 5 in the second direction D2 are disclosed. The present invention can also be applied to the transformer 1 having one radiator 9B that flows.

  Moreover, in each said Example, although the static induction apparatus disclosed the example which is a transformer, this invention is applicable also to other static induction apparatuses, such as a reactor.

  Furthermore, the present invention can also be applied to a stationary induction device having a forced convection type radiator having a cooling fan below the radiator.

DESCRIPTION OF SYMBOLS 1 ... Transformer 4 ... Transformer main body 5 ... Insulating oil 6 ... Tank 7 ... Radiating device 8 ... Panel 9 (9A, 9B, 9C, 9D) ... Radiator 10 (10A, 10B, 10C, 10D) ... Inlet 11 (11A, 11B, 11C, 11D) ... Outlet 12 ... Common pipe 14 for introduction 14 ... Common pipe 16 for derivation ... For introduction Common pipe 18 ... Derivative common pipe D1 ... First direction D2 ... Second direction 24 ... Corner 25 ... Corner 28 ... First passage 29 ... 2nd channel | path 30 ... 3rd channel | path 31 ... 4th channel | paths 32-39 ... piping

Claims (4)

The stationary induction device body,
A tank for accommodating the stationary induction device main body and the cooling insulating medium;
The tank is disposed on the side of the tank, the inlet of one end is connected to the upper part of the tank that is relatively upward, and the outlet of the other end is connected to the lower part of the tank that is relatively lower. A first radiator in which a cooling insulating medium flows in the direction of 1;
It is arranged on the side of the tank so as to be adjacent to the first radiator in the vertical direction, the outlet of one end is connected to the lower part of the tank which is relatively lower, and the inlet of the other end is relatively upward A second radiator that is connected to the upper part of the tank, and in which a cooling insulating medium flows in a second direction opposite to the first direction by convection;
Stationary induction equipment equipped with.   The stationary induction device includes a plurality of first radiators and a plurality of second radiators, and the plurality of first radiators and the plurality of second radiators are alternately arranged in a vertical direction. The stationary induction device according to claim 1, wherein:   An inlet of one end of the plurality of first radiators is connected to an upper portion of the tank that is relatively above by a first introduction common pipe, and is connected to the other end of the plurality of first radiators. An outlet is connected to a lower portion of the tank that is relatively lower by a first lead-out common pipe, and an inlet at the other end of the plurality of second radiators is connected by a second introduction common pipe It is connected to the upper part of the tank that is relatively upper, and the outlet of one end of the plurality of second radiators is connected to the lower part of the tank that is relatively lower by a second lead-out common pipe The stationary guidance device according to claim 2, wherein the stationary guidance device is provided.   The tank is a rectangular parallelepiped, and the first introduction common pipe and the second lead-out common pipe are formed in the tank by providing a first partition plate at a first corner of the tank. The first lead-out common pipe and the second lead-in common pipe are formed in the tank by providing a second partition plate at a second corner of the tank. The stationary induction device according to claim 3.

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