A heat-dissipating dry-type transformer

Abstract

This utility model provides a heat-dissipating dry-type transformer, which includes a housing, pads, air ducts, and a heat dissipation device. An iron core is fixedly installed inside the housing. Pads are fixedly installed at the upper and lower ends of the iron core coil. The air ducts are respectively connected to the pads at the upper and lower ends of the iron core coil. The heat dissipation device is fixedly installed on one side of the housing and includes a vacuum pump fixedly installed at the bottom of one side of the housing, a heat sink fixedly installed on top of the vacuum pump, and a fan fixedly installed on top of the heat sink. This heat-dissipating dry-type transformer, through the combined arrangement of the vacuum pump, pads at the upper and lower ends of the iron core coil, air ducts, and heat sink, allows the heat generated between the iron core and the low-voltage coil, and between the low-voltage coil and the high-voltage coil, to be directly circulated to the heat sink outside the housing. The fan enhances airflow on the surface of the heat sink, improving its heat dissipation efficiency, thereby improving the transformer's overall heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of transformer heat dissipation technology, and in particular to a heat dissipation type dry transformer. Background Technology

[0002] Dry-type transformers are widely used in power systems, but their heat dissipation performance directly affects the operational stability and service life of the equipment. Traditional dry-type transformers mainly rely on natural cooling or forced air cooling (installing fans at the bottom of the transformer heat sink to increase air convection and improve heat dissipation efficiency). This results in low heat dissipation efficiency, rapid heat accumulation, and excessively high localized temperature rise. Especially under high-temperature or high-load operating environments, this can easily lead to accelerated aging of insulation materials, increased heat loss, and even failures. Therefore, this paper proposes an indoor heat-dissipating dry-type transformer. By optimizing the heat dissipation structure, improving heat conduction efficiency, and reducing temperature rise, this design enhances equipment reliability and extends service life, adapting to diverse application scenarios. Utility Model Content

[0003] The purpose of this invention is to provide a heat-dissipating dry-type transformer to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A heat-dissipating dry-type transformer includes: a housing, in which an iron core is fixedly disposed; a pad, fixedly disposed at the upper and lower ends of the iron core coil; a vent pipe, respectively connected to the pads disposed at the upper and lower ends of the iron core coil; and a heat dissipation device, fixedly disposed on one side of the housing, the heat dissipation device including a vacuum pump fixedly disposed at the bottom of one side of the housing, a heat sink fixedly disposed at the top of the vacuum pump, and a fan fixedly disposed at the top of the heat sink.

[0005] Furthermore, a support platform is fixedly provided at the edge of the pad, and an installation groove is provided on the top of the support platform. A sealing gasket is provided in the installation groove. A core column through groove is provided in the middle of the pad, and through grooves are provided at both ends of the core column through groove on the pad. A boss is fixedly provided on the pad around the core column through groove, and a groove is provided on the boss. Columnar through grooves are provided at both ends of the pad along its length.

[0006] Furthermore, the pad located at the upper end of the iron core coil also includes two through slots formed on one side of one of the through slots.

[0007] Furthermore, the air guide pipe is provided with multiple branch pipes, and the multiple branch pipes are respectively connected to the cylindrical through slots of the pads at the upper and lower ends of the iron core coil.

[0008] Furthermore, the air guide pipe located at the upper end of the iron core coil is connected to the heat sink through a first connecting pipe, the air guide pipe located at the lower end of the iron core coil is connected to the vacuum pump through a second connecting pipe, and the vacuum pump is connected to the heat sink through a third connecting pipe. Control valves are connected to the second connecting pipe and the third connecting pipe.

[0009] Furthermore, a pressure relief pipe is provided on the second connecting pipe, and a control valve is connected to the pressure relief pipe.

[0010] Furthermore, the housing is fixedly provided with a multi-support protective cover on the side near the heat sink, and the vacuum pump and the fan are respectively fixedly mounted on the support plate inside the multi-support protective cover.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a heat-dissipating dry-type transformer. Through the combination of a vacuum pump, pads at both ends of the iron core coil, air duct, and heat sink, the heat generated between the iron core and the low-voltage coil, and between the low-voltage coil and the high-voltage coil, is directly circulated to the heat sink outside the tank. The installation of a fan enhances the airflow on the surface of the heat sink, improves the heat dissipation efficiency of the heat sink, and thus improves the heat dissipation efficiency of the transformer. Attached Figure Description

[0012] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a three-dimensional sectional view of a heat-dissipating dry-type transformer according to an embodiment of the present utility model; Figure 2 As described in the embodiments of this utility model Figure 1 Enlarged view at point I; Figure 3 This is a top sectional view of a heat-dissipating dry-type transformer according to an embodiment of the present invention; Figure 4 This is a side sectional view of the multi-support protective cover described in an embodiment of the present invention; Figure 5 As described in the embodiments of this utility model Figure 4 Enlarged view at point II; Figure 6 This is a perspective view of the pad described in an embodiment of the present utility model; Figure 7 This is a perspective view of the pad described in an embodiment of the present invention from another angle; Figure 8This is a perspective view of the pad located at the upper end of the iron core coil as described in an embodiment of the present invention.

[0013] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Iron core; 3. Pad plate; 301. Support platform; 302. Mounting groove; 303. Sealing gasket; 304. Core column through groove; 305. Through groove; 306. Boss; 307. Groove; 308. Columnar through groove; 309. Through groove; 4. Air guide pipe; 401. Branch pipe; 5. Heat dissipation device; 501. Vacuum pump; 502. Heat sink; 503. Fan; 6. First connecting pipe; 7. Second connecting pipe; 701. Pressure relief pipe; 8. Third connecting pipe; 9. Control valve; 10. Multi-support protective cover. Detailed Implementation

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0015] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "back" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] This embodiment relates to a heat-dissipating dry-type transformer, the overall structure of which is as follows: Figure 1 As shown, it includes a housing 1, a pad 3, an air duct 4, and a heat dissipation device 5.

[0018] The housing 1 contains a core 2, and a pad 3 is fixedly installed at the upper and lower ends of the core 2 coil. A gas pipe 4 is connected to the pad 3 at the upper and lower ends of the core 2 coil. A heat dissipation device 5 is fixedly installed on one side of the housing 1. The heat dissipation device 5 includes a vacuum pump 501 fixedly installed at the bottom of one side of the housing 1, a heat sink 502 fixedly installed at the top of the vacuum pump 501, and a fan 503 fixedly installed at the top of the heat sink 502.

[0019] It is worth mentioning that the core 2 coil is existing technology, including a low-voltage coil and a high-voltage coil sleeved on the core column of the core 2. Pads 3 are respectively installed at the upper and lower ends of the core 2 coil. The bottom of the pad 3 located at the lower end of the core 2 coil is pressed against the lower clamp of the core 2, and the bottom of the pad 3 located at the upper end of the core 2 coil is pressed against the upper clamp of the core 2 by a fixing nut. This presses the pads 3 at both ends of the core 2 together with the core 2 coil, forming a cavity between the core 2, the low-voltage coil, the high-voltage coil, and the pads 3 at both ends of the core 2. A vent pipe 4 located at the upper end of the core 2 coil is connected to and installed on the upper pad 3 of the core 2 coil, and a vent pipe 4 located at the lower end of the core 2 coil is connected to and installed on the lower pad 3 of the core 2 coil. The heat dissipation device 5 is fixedly installed on one side of the outside of the housing 1. The vacuum pump 501 is a dry pump installed at the bottom of the outside of the housing 1. The negative pressure value of the vacuum pump 501 is adjusted and controlled to make the gas in the air guide pipe 4 at the lower end of the iron core 2 coil flow slowly, so that the air in the gap between the iron core 2 and the low voltage coil and between the low voltage coil and the high voltage coil flows, and the generated heat is circulated out through the air guide pipe 4 at the lower end of the iron core 2 coil. The heat sink 502 is installed on the top of the vacuum pump 501 to dissipate the hot gas circulated out by the vacuum pump 501. The fan 503 is installed on the top of the heat sink 502 to increase the air flow on the surface of the heat sink 502, thereby enhancing the heat dissipation performance of the heat sink 502 and improving the heat dissipation efficiency of the iron core 2.

[0020] As a preferred option, such as Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, in this embodiment, a support platform 301 is fixedly installed at the edge of the pad 3. A mounting groove 302 is provided on the top of the support platform 301, and a sealing gasket 303 is installed inside the mounting groove 302. A core column through-slot 304 is provided in the middle of the pad 3. Through-slots 305 are provided at both ends of the core column through-slot 304 on the pad 3. A boss 306 is fixedly installed on the pad 3 around the outer periphery of the core column through-slot 304. A groove 307 is provided on the boss 306. Columnar through-slots 308 are provided at both ends along the length of the pad 3. The pad 3 located at the upper end of the iron core 2 coil also includes two through-slots 309 opened on one side of one of the through-slots 305.

[0021] It should be noted that the support platform 301 forms a closed protrusion at the edge of the pad 3. The edges of both ends of the high-voltage coil of the iron core 2 are pressed against the support platform 301. The mounting groove 302 is opened at the top of the support platform 301 for the installation of the sealing gasket 303, so that the two ends of the high-voltage coil of the iron core 2 are pressed against the sealing gasket 303 at the top of the support platform 301, increasing the sealing between the high-voltage coil of the iron core 2 and the pad 3. The core column through groove 304 is opened in the middle of the pad 3, matching the shape of the core column of the iron core 2. The through groove 305 is opened on the pad 3 and located at both ends of the core column through groove 304, for the installation of the pull plate between the upper and lower clamps of the iron core 2. There are four protrusions 306, symmetrically installed on the pad 3, for... The mounting of the low-voltage coil of the core 2 is supported by a groove 307 on the top of the boss 306. The insulating paper between the low-voltage coil and the high-voltage coil of the core 2 is installed on the groove 307. Four cylindrical through slots 308 are symmetrically opened on the pad 3 and are connected to the branch pipes 401 of the air guide pipes 4 at both ends of the core 2 coil. This makes the air guide pipes 4 at both ends of the core 2, the pad 3 at both ends of the core 2 coil and the cavity between the core 2 and the core 2 and the core 2 coil, and the gap between the core 2 and the low-voltage coil and the low-voltage coil and the high-voltage coil form a closed loop. Two through slots 309 are opened on one side of one of the through slots 305 on the pad 3 at the upper end of the core 2 coil. The two through slots 309 are arranged in sequence and are used to install the two copper busbars on the low-voltage coil.

[0022] As a preferred option, it remains as follows Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the air duct 4 is provided with multiple branch pipes 401, and the multiple branch pipes 401 are respectively connected to the cylindrical through slots 308 of the pads 3 at the upper and lower ends of the coil of the iron core 2.

[0023] Specifically, the branch pipes 401 on the air guide pipes 4 at both ends of the iron core 2 coil are connected to the cylindrical through slots 308 on the pads 3 at both ends of the iron core 2 coil, so that the cavity between the iron core 2 coil and the pads 3 located at both ends of the iron core 2 coil is connected to the air guide pipes 4 at both ends of the iron core 2 coil.

[0024] As a preferred option, it remains as follows Figure 4 and Figure 5 As shown, in this embodiment, the air guide pipe 4 located at the upper end of the iron core 2 coil is connected to the heat sink 502 via a first connecting pipe 6. The air guide pipe 4 located at the lower end of the iron core 2 coil is connected to the vacuum pump 501 via a second connecting pipe 7. The vacuum pump 501 is connected to the heat sink 502 via a third connecting pipe 8. A control valve 9 is connected to the second connecting pipe 7 and the third connecting pipe 8. A pressure relief pipe 701 is provided on the second connecting pipe 7, and the control valve 9 is connected to the pressure relief pipe 701.

[0025] Specifically, the first connecting pipe 6 is installed between the air guide pipe 4 at the upper end of the coil of the iron core 2 and the heat sink 502, so that the gas cooled in the heat sink 502 is transported back to the air guide pipe 4 at the upper end of the iron core 2 through the first connecting pipe 6. The second connecting pipe 7 is installed between the air guide pipe 4 at the lower end of the coil of the iron core 2 and the vacuum pump 501, so that the gas in the air guide pipe 4 at the lower end of the coil of the iron core 2 is transported to the vacuum pump 501 through the second connecting pipe 7. The pressure relief pipe 701 is installed on the second connecting pipe 7 and is used to perform pressure relief when the vacuum pump 501 is turned off.

[0026] When vacuum pump 501 is turned on, close the control valve 9 on the pressure relief pipe 701 and open the control valve 9 on the second connecting pipe 7 and the third connecting pipe 8. When vacuum pump 501 is turned off, simultaneously close the control valve 9 on the second connecting pipe 7 and the third connecting pipe 8, then open the control valve 9 on the pressure relief pipe 701 to turn off vacuum pump 501.

[0027] As a preferred option, it remains as follows Figure 1 and Figure 4 As shown, in this embodiment, the housing 1 is fixedly provided with a multi-support protective cover 10 on the side near the heat sink 502, and the vacuum pump 501 and the fan 503 are respectively fixedly provided on the support plate inside the multi-support protective cover 10.

[0028] Specifically, the multi-support protective cover 10 is fixedly installed on the housing 1 on one side of the heat sink 502 to protect the fan 503, heat sink 502 and vacuum pump 501 and to provide support for the installation of the fan 503, heat sink 502 and vacuum pump 501. The bottom of the multi-support protective cover 10 is provided with a ventilation port for the exchange of hot gas inside the multi-support protective cover 10 with the outside.

[0029] During the installation process, insulating varnish is applied between the core post through groove 304 of the pad plate 3 and the core post of the iron core 2, between the through groove 305 and the pull plate, and between the through groove 309 and the copper busbar on the low voltage coil to increase the sealing between the pad plate 3 at both ends of the iron core 2 and the core post of the iron core 2, the pull plate and the copper busbar on the low voltage coil.

[0030] The heat-dissipating dry-type transformer of this utility model, through the combination of vacuum pump 501, pads 3 at both ends of the iron core 2 coil, connecting pipe and heat sink 502, allows the heat generated between the iron core 2 and the low-voltage coil and between the low-voltage coil and the high-voltage coil to be directly circulated to the heat sink 502 outside the housing 1. The setting of fan 503 enhances the air flow on the surface of heat sink 502, improves the heat dissipation efficiency of heat sink 502, and thus improves the heat dissipation efficiency of the transformer.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat-dissipating dry-type transformer, characterized in that, include: Box (1), and an iron core (2) is fixedly installed inside the box (1); The pad (3) is fixedly installed at the upper and lower ends of the coil of the iron core (2); The air guide tube (4) is connected to the pads (3) set at the upper and lower ends of the coil of the iron core (2); The heat dissipation device (5) is fixedly installed on one side of the housing (1). The heat dissipation device (5) includes a vacuum pump (501) fixedly installed at the bottom of one side of the housing (1), a heat sink (502) fixedly installed on the top of the vacuum pump (501), and a fan (503) fixedly installed on the top of the heat sink (502).

2. A heat-dissipating dry-type transformer according to claim 1, characterized in that: A support platform (301) is fixedly provided at the edge of the pad (3). An installation groove (302) is provided on the top of the support platform (301). A sealing gasket (303) is provided in the installation groove (302). A core column through groove (304) is provided in the middle of the pad (3). Through grooves (305) are provided at both ends of the core column through groove (304) on the pad (3). A boss (306) is fixedly provided on the pad (3) on the outer circumference of the core column through groove (304). A groove (307) is provided on the boss (306). A columnar through groove (308) is provided at both ends in the length direction of the pad (3).

3. A heat-dissipating dry-type transformer according to claim 2, characterized in that: The pad (3) located at the upper end of the coil of the iron core (2) also includes two through slots (309) opened on one side of one of the through slots (305).

4. A heat-dissipating dry-type transformer according to claim 1, characterized in that: The air guide pipe (4) is provided with multiple branch pipes (401), and the multiple branch pipes (401) are respectively connected to the cylindrical through slots (308) of the pads (3) at the upper and lower ends of the coil of the iron core (2).

5. A heat-dissipating dry-type transformer according to claim 1, characterized in that: The air guide pipe (4) located at the upper end of the coil of the iron core (2) is connected to the heat sink (502) through the first connecting pipe (6). The air guide pipe (4) located at the lower end of the coil of the iron core (2) is connected to the vacuum pump (501) through the second connecting pipe (7). The vacuum pump (501) is connected to the heat sink (502) through the third connecting pipe (8). A control valve (9) is connected to the second connecting pipe (7) and the third connecting pipe (8).

6. A heat-dissipating dry-type transformer according to claim 5, characterized in that: The second connecting pipe (7) is provided with a pressure relief pipe (701), and a control valve (9) is connected to the pressure relief pipe (701).

7. A heat-dissipating dry-type transformer according to claim 1, characterized in that: The housing (1) has a multi-support protective cover (10) fixedly installed on the side near the heat sink (502), and the vacuum pump (501) and the fan (503) are respectively fixedly installed on the support plate inside the multi-support protective cover (10).

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