Dry-type box transformer substation

Abstract

The utility model relates to a dry-type box transformer, which relates to the field of transformers, and comprises a support heat insulation mechanism arranged in a foundation, a box body arranged on the support heat insulation mechanism, a transformation module arranged in the box body, and a heat dissipation mechanism for dissipating heat of the transformation module in the box body, the heat dissipation mechanism comprises a heat exchange air pipe arranged in the supporting heat insulation mechanism, an air inlet pipe which is communicated with one end of the heat exchange air pipe and extends out of the upper surface of the supporting heat insulation mechanism, a transmission air pipe which is communicated with the other end of the heat exchange air pipe and is communicated with the air inlet end of the box body, and an air outlet pipe which is communicated with the air outlet end of the box body; a first air draft piece is arranged in the air inlet pipe, and an air inlet is formed in the end, away from the heat exchange air pipe, of the air inlet pipe. According to the invention, the external air is firstly introduced into the support heat insulation mechanism with a low temperature, and the air temperature in the heat exchange air pipe is reduced, so that the air with a low temperature can be conveyed into the box body, and the heat dissipation of the transformer module in the box body is facilitated, thereby improving the heat dissipation effect.

Description

Technical Field

[0001] The present application relates to the field of transformers, and in particular to a dry-type box transformer. Background Art

[0002] The box-type transformer (usually referred to as "box transformer") concentrates the traditional transformer in a box-type shell. It has the characteristics of small size, light weight, low noise, low loss and high reliability. It is widely used in residential areas, commercial centers, light stations, airports, factories, mines, enterprises, hospitals, schools and other places.

[0003] As a complete set of power distribution equipment, box-type transformer is composed of transformer, high voltage control equipment and low voltage control equipment. Its basic principle is to reasonably assemble the pressure starting system, armored wire, substation automatic system, DC system and corresponding technical equipment in the prescribed order, and install all components in a specific waterproof, dustproof and rat-proof fully sealed tempered box structure to form a specific transformer.

[0004] With respect to the above-mentioned related technologies, the inventors believe that in summer, the transformer is overloaded due to the increase in people's electricity consumption, and the air temperature above the ground is also very high. Natural ventilation alone cannot meet the heat dissipation requirements of the transformer. If the heat of the transformer cannot be dissipated in time, it is easy to cause failure due to overheating. Utility Model Content

[0005] In order to improve the heat dissipation effect of a box-type transformer, the present application provides a dry-type box-type transformer.

[0006] The present application provides a dry-type box transformer, which adopts the following technical solution:

[0007] A dry-type box transformer comprises a supporting insulation mechanism arranged in a foundation, a box body arranged on the supporting insulation mechanism, a transformer module arranged in the box body, and a heat dissipation mechanism for dissipating heat from the transformer module in the box body, wherein the heat dissipation mechanism comprises a heat exchange air duct arranged in the supporting insulation mechanism, an air inlet duct connected to one end of the heat exchange air duct and extending out of the upper surface of the supporting insulation mechanism, a transmission air duct connected to the other end of the heat exchange air duct and connected to the air inlet end of the box body, and an air outlet duct connected to the air outlet end of the box body, a first air exhaust member is arranged in the air inlet duct, and an air inlet is arranged at one end of the air inlet duct away from the heat exchange air duct.

[0008] By adopting the above technical scheme, since the supporting insulation mechanism is located in the foundation and has a heat insulation function, it is difficult for external heat to enter the supporting insulation mechanism, so that the internal temperature is relatively low. The first exhaust member draws external air into the air inlet duct and transports it to the heat exchange duct. Since the heat exchange duct is located in the supporting insulation mechanism, the heat exchange duct can transfer part of the heat of the air in the heat exchange duct to the inside of the supporting insulation mechanism and reduce the temperature in the heat exchange duct, so that the air with a lower temperature can be transported into the box, which is convenient for dissipating the heat of the transformer module in the box to improve the heat dissipation effect.

[0009] Optionally, the foundation is provided with an installation pit for installing a supporting insulation mechanism, the supporting insulation mechanism includes a concrete frame arranged in the installation pit, sandy soil arranged in the concrete frame, and an insulation layer arranged on the inner side of the concrete frame, the bottom of the concrete frame is open, the heat exchange air duct is buried in the sandy soil, the air inlet duct and the transmission air duct both pass through the concrete frame, and the box is arranged on the top of the concrete frame.

[0010] By adopting the above technical scheme, the concrete frame and the insulation layer can insulate the sandy soil, so that the heat of solar radiation is not easily transferred to the sandy soil, and the temperature inside the sandy soil is lower than the temperature of the outside air. Moreover, since the sandy soil has a high sand content and a high thermal conductivity, it has good heat transfer performance, which facilitates heat exchange between the sandy soil and the heat exchange air duct.

[0011] Optionally, a heat exchange plate is provided at the bottom opening of the concrete frame, and the sandy soil is located on top of the heat exchange plate.

[0012] By adopting the above technical solution, since the temperature of the soil below the heat exchange plate is relatively low, heat exchange between the sandy soil and the bottom soil can be achieved.

[0013] Optionally, one end of the transmission air duct away from the heat exchange air duct is connected to a transmission diversion pipe, and one end of the transmission diversion pipe away from the transmission air duct is connected to a plurality of transmission diversion pipes that are evenly arranged and connected to the air inlet end of the box.

[0014] By adopting the above technical solution, after the air enters the transmission branch pipe from the transmission air duct, multiple transmission branch pipes can divert the air in the transmission branch pipe and evenly pass the air into the box to improve the heat dissipation effect of the box.

[0015] Optionally, a connecting pipe is provided between the air inlet pipe and the transmission air pipe, a first three-way valve is provided between the air inlet pipe and the connecting pipe, and a second three-way valve is provided between the transmission air pipe and the connecting pipe.

[0016] By adopting the above technical solution, in winter, since the soil temperature is more stable and warmer than the surface temperature, at this time, the first three-way valve and the second three-way valve are operated so that the air does not pass through the heat exchange air duct but directly enters the box.

[0017] Optionally, a plurality of support columns are vertically arranged in the concrete frame, the support columns penetrate the sandy soil and the heat exchange plate, and the lower ends of the support columns extend out of the bottom of the heat exchange plate.

[0018] By adopting the above technical solution, the setting of the support columns can connect the concrete frame and the heat exchange plate to improve the connection stability between the two.

[0019] Optionally, one end of the air outlet pipe close to the box is connected to an air outlet collecting pipe, and one end of the air outlet collecting pipe away from the air outlet pipe is connected to a plurality of evenly arranged air outlet branch pipes connected to the air outlet end of the box, and a second air exhaust member is arranged in the air outlet pipe.

[0020] By adopting the above technical solution, after the air entering the box absorbs the heat emitted by the transformer module, the hot air is collected in the air outlet collecting pipe through multiple air outlet branch pipes and discharged to the outside along the air outlet pipe.

[0021] Optionally, a dust filter net and a water filter sponge are provided in the air inlet pipe, and the air inlet of the air inlet pipe faces downward.

[0022] By adopting the above technical solution, dust is physically intercepted when passing through, which can reduce the phenomenon of dust entering the box.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. First, let the outside air pass into the supporting insulation structure with lower temperature, and lower the temperature in the heat exchange air duct, so that the lower temperature air can be transported into the box, which is convenient for heat dissipation of the transformer module in the box to improve the heat dissipation effect;

[0025] 2. In winter, since the soil temperature is more stable and warmer than the surface temperature, at this time, operate the first three-way valve and the second three-way valve so that the air does not pass through the heat exchange duct but directly enters the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of a dry-type box transformer;

[0027] Figure 2 This is a schematic diagram of the dry-type box transformer and transformer module;

[0028] Figure 3 It is a cross-sectional view of a dry-type box transformer.

[0029] Explanation of the reference numerals in the accompanying drawings: 1. Support and insulation mechanism; 2. Box body; 3. Voltage transformer module; 4. Heat dissipation mechanism; 5. Heat exchange air duct; 6. Air inlet pipe; 7. Transmission air duct; 8. Air outlet pipe; 9. First air exhaust member; 10. Dust filter; 11. Water filter sponge; 12. Concrete frame; 13. Sandy soil; 14. Insulation layer; 15. Heat exchange plate; 16. Support column; 17. Transmission diversion pipe; 18. Transmission branch pipe; 19. Air outlet collecting pipe; 20. Air outlet branch pipe; 21. Second air exhaust member; 22. Connecting pipe; 23. First three-way valve; 24. Second three-way valve. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1 to 3 This application is described in further detail.

[0031] The present application embodiment discloses a dry type box transformer. Figure 1 and Figure 2 The dry-type box transformer includes a supporting heat-insulating mechanism 1, a box body 2, a transformer module 3 and a heat dissipation mechanism 4. The supporting heat-insulating mechanism 1 is installed on the foundation. A mounting pit is provided on the top of the foundation. The mounting pit is used to install the supporting heat-insulating mechanism 1. The top of the supporting heat-insulating mechanism 1 is flush with the surface of the foundation. The box body 2 is installed on the top of the supporting heat-insulating mechanism 1. The transformer module 3 is installed in the box body 2. The transformer module 3 is organically composed of a transformer, a high-voltage voltage control device and a low-voltage voltage control device. The transformer module 3 is a prior art and will not be described in detail here.

[0032] Reference Figure 3 The heat dissipation mechanism 4 is installed between the supporting heat-insulating mechanism 1 and the box body 2. The heat dissipation mechanism 4 includes a heat exchange air duct 5, an air inlet duct 6, a transmission air duct 7 and an air outlet duct 8. The heat exchange air duct 5 is installed in the supporting heat-insulating mechanism 1. The air inlet duct 6 is fixedly connected to one end of the heat exchange air duct 5. The end of the air inlet duct 6 away from the heat exchange air duct 5 passes through and extends out of the top of the supporting heat-insulating mechanism 1. The end of the air inlet duct 6 away from the heat exchange air duct 5 is set as an air inlet. A first air exhaust component 9 is installed in the air inlet duct 6. The transmission air duct 7 is fixedly connected to the end of the heat exchange air duct 5 away from the air inlet duct 6. The end of the transmission air duct 7 away from the heat exchange air duct 5 is connected to the air inlet end of the box body 2. The air outlet duct 8 is fixedly connected to the air outlet end of the box body 2. In this embodiment, the first air exhaust component 9 is a fan.

[0033] Since the supporting insulation mechanism 1 is located in the foundation and has an insulation function, it is difficult for external heat to enter the supporting insulation mechanism 1, so that the internal temperature is relatively low. The first exhaust member 9 is started, and the first exhaust member 9 draws external air into the air inlet pipe 6 and transports it to the heat exchange air duct 5. Since the heat exchange air duct 5 is located in the supporting insulation mechanism 1, the heat exchange air duct 5 can transfer part of the heat of the air in the heat exchange air duct 5 to the inside of the supporting insulation mechanism 1, and reduce the temperature in the heat exchange air duct 5, so that the air with a lower temperature can be transported to the box body 2, which is convenient for dissipating the heat of the transformer module 3 in the box body 2 to improve the heat dissipation effect.

[0034] Furthermore, a dust filter 10 and a water filter sponge 11 are installed in the air inlet 6, and the air inlet of the air inlet 6 is downward. In this embodiment, the fibers in the dust filter 10 are interwoven to form a mesh structure, and large particles of dust are physically intercepted when passing through, which can reduce the phenomenon of dust entering the box 2. The porous structure of the water filter sponge 11 provides a large surface area, which can physically intercept and absorb suspended particles and larger microorganisms in the water. The air inlet of the air inlet 6 is downward, which can reduce the phenomenon of rainwater entering the air inlet 6.

[0035] Preferably, the supporting insulation mechanism 1 includes a concrete frame 12, sandy soil 13 and an insulation layer 14. The concrete frame 12 is hollow and the bottom of the concrete frame 12 is open. A heat exchange plate 15 is installed at the bottom opening of the concrete frame 12. The insulation layer 14 is installed on the inner side of the concrete frame 12. Plastic films are installed on both sides of the insulation layer 14. The sandy soil 13 fills the inner space of the concrete frame 12, and the sandy soil 13 is located on the top of the heat exchange plate 15. The heat exchange air duct 5 is buried in the sandy soil 13. The heat exchange air duct 5 is serpentine. The air inlet pipe 6 and the transmission air duct 7 both pass through the concrete frame 12. The top of the concrete frame 12 is flush with the foundation surface, and the box 2 is installed on the top of the concrete frame 12.

[0036] The concrete frame 12 can provide support for the box body 2, and the concrete frame 12 is cast by concrete. Concrete itself is a poor conductor of heat, and its heat conduction speed is slow and its efficiency is low. The concrete frame 12 cooperates with the heat insulation layer 14 to insulate the sandy soil 13, so that the heat of solar radiation is not easily transferred to the sandy soil 13, so that the temperature in the sandy soil 13 is lower than the temperature of the outside air. In addition, since the sand content of the sandy soil 13 is high and the thermal conductivity is high, the heat transfer performance is good, which facilitates heat exchange between the sandy soil 13 and the heat exchange air duct 5. In addition, the heat exchange plate 15 is made of aluminum alloy material. Although the density of aluminum is low, its alloy form can provide strength comparable to that of steel. At the same time, the thermal conductivity of aluminum alloy is good.

[0037] In this embodiment, the heat insulating layer 14 may be extruded polystyrene, which has a continuous and uniform surface layer and a closed-cell honeycomb structure, low thermal conductivity, and low water absorption, and is suitable for underground waterproofing and heat insulation.

[0038] Furthermore, a plurality of support columns 16 are vertically fixed in the concrete frame 12, and the plurality of support columns 16 are arranged in an array, and the top ends of the support columns 16 penetrate the plastic film and the heat insulation layer 14, and the support columns 16 penetrate the sandy soil 13 and the heat exchange plate 15, and the lower ends of the support columns 16 extend out of the bottom of the heat exchange plate 15, and the support columns 16 and the heat exchange plate 15 are welded. In this embodiment, the support columns 16 are also made of aluminum alloy material, which has high strength and good heat conduction performance.

[0039] The setting of the support column 16 can connect the concrete frame 12 and the heat exchange plate 15 to improve the connection stability between the two and improve the load-bearing performance of the concrete frame 12. In addition, the support column 16 made of aluminum alloy material can further improve the heat conduction around the sandy soil 13.

[0040] Reference Figure 2 Preferably, one end of the transmission air duct 7 away from the heat exchange air duct 5 is fixedly connected to a transmission branch pipe 17, and one end of the transmission branch pipe 17 away from the transmission air duct 7 is fixedly connected to multiple transmission branch pipes 18, and the multiple transmission branch pipes 18 are evenly arranged on the transmission branch pipe 17, and the transmission branch pipes 18 are connected to the air inlet end of the box body 2.

[0041] After the air enters the transmission branch pipe 17 from the transmission air duct 7 , the multiple transmission branch pipes 18 can branch the air in the transmission branch pipe 17 and evenly pass the air into the box body 2 to improve the heat dissipation effect of the box body 2 .

[0042] Furthermore, one end of the air outlet pipe 8 close to the box body 2 is fixedly connected to an air outlet collecting pipe 19, and one end of the air outlet collecting pipe 19 away from the air outlet pipe 8 is fixedly connected to multiple air outlet branch pipes 20. The multiple air outlet branch pipes 20 are evenly arranged on the air outlet collecting pipe 19, and the air outlet branch pipes 20 are connected to the air outlet end of the box body 2.

[0043] After the air entering the box body 2 absorbs the heat emitted by the transformer module 3, the hot air is collected in the air outlet collection pipe 19 through a plurality of air outlet branch pipes 20 and discharged to the outside along the air outlet pipe 8. It should be noted that a second air suction member 21 is installed in the air outlet pipe 8. The second air suction member 21 can increase the air outlet and air intake volume, and at the same time, can reduce the load of the first air suction member 9. In this embodiment, the second air suction member 21 is a fan.

[0044] Preferably, a connecting pipe 22 is installed between the air inlet pipe 6 and the transmission air pipe 7, a first three-way valve 23 is installed between the air inlet pipe 6 and the connecting pipe 22, and a second three-way valve 24 is installed between the transmission air pipe 7 and the connecting pipe 22. In winter, since the soil temperature is more stable and warmer than the surface temperature, at this time, the first three-way valve 23 is operated to connect the air inlet pipe 6 with the connecting pipe 22, so that the air inlet pipe 6 is not connected with the heat exchange air pipe 5, and the second three-way valve 24 is operated to connect the transmission air pipe 7 with the connecting pipe 22, so that the transmission air pipe 7 is not connected with the heat exchange air pipe 5, so that the air does not pass through the heat exchange air pipe 5, but directly enters the box body 2. Similarly, in summer, since the soil temperature is lower than the surface temperature, at this time, the first three-way valve 23 is operated to disconnect the air inlet pipe 6 from being connected to the connecting pipe 22, and to connect the air inlet pipe 6 to the heat exchange air duct 5. The second three-way valve 24 is operated to disconnect the transmission air duct 7 from being connected to the connecting pipe 22, and to connect the transmission air duct 7 to the heat exchange air duct 5, so that air can pass through the heat exchange air duct 5.

[0045] The implementation principle of a dry-type box transformer in an embodiment of the present application is: in winter, since the soil temperature is more stable and warmer than the surface temperature, at this time, the first three-way valve 23 and the second three-way valve 24 are operated to allow the air to pass through the heat exchange air duct 5 directly into the box body 2, thereby dissipating the heat of the transformer module 3 in the box body 2; in summer, since the soil temperature is lower than the surface temperature, at this time, the first three-way valve 23 and the second three-way valve 24 are operated to allow the air to pass through the heat exchange air duct 5, thereby dissipating the heat of the transformer module 3 in the box body 2.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A dry type box transformer, characterized by: The invention comprises a supporting heat-insulating mechanism (1) arranged in a foundation, a box (2) arranged on the supporting heat-insulating mechanism (1), a transformer module (3) arranged in the box (2), and a heat dissipation mechanism (4) for dissipating heat from the transformer module (3) in the box (2); the heat dissipation mechanism (4) comprises a heat exchange air duct (5) arranged in the supporting heat-insulating mechanism (1), an air inlet pipe (6) connected to one end of the heat exchange air duct (5) and extending out of the upper surface of the supporting heat-insulating mechanism (1), a transmission air duct (7) connected to the other end of the heat exchange air duct (5) and connected to the air inlet end of the box (2), and an air outlet pipe (8) connected to the air outlet end of the box (2); a first air exhaust member (9) is arranged in the air inlet pipe (6), and an air inlet is arranged at one end of the air inlet pipe (6) away from the heat exchange air duct (5).

2. A dry type box transformer according to claim 1, characterized in that: The foundation is provided with an installation pit for installing a supporting heat-insulating mechanism (1), the supporting heat-insulating mechanism (1) comprising a concrete frame (12) arranged in the installation pit, sandy soil (13) arranged in the concrete frame (12), and a heat-insulating layer (14) arranged inside the concrete frame (12); the bottom of the concrete frame (12) is open, the heat-exchange air duct (5) is buried in the sandy soil (13), the air inlet duct (6) and the transmission air duct (7) both pass through the concrete frame (12), and the box body (2) is arranged on the top of the concrete frame (12).

3. A dry type box transformer according to claim 2, characterized in that: A heat exchange plate (15) is arranged at the bottom opening of the concrete frame (12), and the sandy soil (13) is located on the top of the heat exchange plate (15).

4. The dry type box transformer according to claim 1 is characterized in that: One end of the transmission air duct (7) away from the heat exchange air duct (5) is connected to a transmission branch pipe (17), and one end of the transmission branch pipe (17) away from the transmission air duct (7) is connected to a plurality of transmission branch pipes (18) that are evenly arranged and connected to the air inlet end of the box body (2).

5. The dry type box transformer according to claim 1 is characterized in that: A connecting pipe (22) is provided between the air inlet pipe (6) and the transmission air pipe (7), a first three-way valve (23) is provided between the air inlet pipe (6) and the connecting pipe (22), and a second three-way valve (24) is provided between the transmission air pipe (7) and the connecting pipe (22).

6. The dry type box transformer according to claim 3 is characterized in that: A plurality of support columns (16) are vertically arranged in the concrete frame (12), the support columns (16) penetrate the sandy soil (13) and the heat exchange plate (15), and the lower ends of the support columns (16) extend out of the bottom of the heat exchange plate (15).

7. The dry type box transformer according to claim 1 is characterized in that: The end of the air outlet pipe (8) close to the housing (2) is connected to an air outlet collecting pipe (19), and the end of the air outlet collecting pipe (19) away from the air outlet pipe (8) is connected to a plurality of evenly arranged air outlet branch pipes (20) connected to the air outlet end of the housing (2), and a second air exhaust member (21) is arranged in the air outlet pipe (8).

8. The dry type box transformer according to claim 1, characterized in that: A dust filter (10) and a water filter sponge (11) are arranged in the air inlet pipe (6), and the air inlet of the air inlet pipe (6) faces downward.

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