External intelligent cloud air-cooled cooler for oil-immersed transformer

Abstract

The invention relates to the technical field of transformers, and discloses an external intelligent cloud oil-immersed transformer air-cooled cooler which comprises a shell, a supporting table, a winding and transformer oil, finned tube type heat exchange pieces are arranged on the surfaces of the front side and the rear side of the shell correspondingly, and the finned tube type heat exchange pieces comprise left cooling pieces and right cooling pieces; a liquid outlet pipe and a liquid inlet pipe are arranged at the upper end and the lower end of the finned tube type heat exchange piece in a penetrating mode respectively, a thin cavity is formed in the finned tube type heat exchange piece, and the liquid outlet pipe and the liquid inlet pipe are communicated through the thin cavity in the finned tube type heat exchange piece. By monitoring the temperature of the transformer in real time, when the temperature of the transformer is abnormal, the transformer is rapidly cooled through the cascade refrigeration technology, and therefore the temperature of the transformer is rapidly reduced to the normal range; through the special fin structure, when convection heat dissipation is carried out, cold air flow can form vortexes when passing through the fins of the special structure, and therefore heat exchange is fully carried out between the cold air flow and the transformer.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to an external intelligent cloud oil-immersed transformer air-cooled cooler. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are primary coil, secondary coil and iron core. The main functions of a transformer are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc. According to its use, it can be divided into: power transformer and special transformer.

[0003] The existing patent discloses a transformer with automatic air cooling and heat dissipation in high-temperature areas (publication number CN114334362A), which relates to the field of transformer technology, including a transformer body, a heat dissipation fan and an auxiliary heat dissipation component, wherein an outer cover shell is installed on the outside of the transformer body, and a temperature detection component is installed in the middle of the front and rear of the outer cover shell, a first displacement component is installed on the top of the outer cover shell, and a connecting plate is arranged on the lower side of the first displacement component, the connecting plate passes through the inner wall groove of the outer cover shell, and a movable outer frame is fixed below the connecting plate. The patent only discloses a technical solution for dissipating heat from the transformer by air cooling, and because the fan adopts a fixed air outlet design, it is easy for heat to accumulate in the blind area of ​​the fan. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide an external intelligent cloud oil-immersed transformer air-cooled cooler, which solves the problems in the above-mentioned background technology.

[0005] To solve the above technical problems, according to one aspect of the present invention, more specifically, an external intelligent cloud oil-immersed transformer air-cooled cooler comprises a shell, a support platform, a winding and transformer oil, finned tube heat exchangers are arranged on the front and rear surfaces of the shell, the finned tube heat exchangers comprise a left heat sink and a right heat sink, a liquid outlet pipe and a liquid inlet pipe are respectively penetrated at the upper and lower ends of the finned tube heat exchangers, a thin cavity is arranged inside the finned tube heat exchangers, and the liquid outlet pipe and the liquid inlet pipe are connected through the thin cavity in the finned tube heat exchangers; A bottom box is installed below the shell, and a centrifugal pump structure and four filter chambers are arranged in the bottom box. Four conduits 1 are connected to the surface of the centrifugal pump structure, and the other ends of the four conduits 1 respectively penetrate into the four filter chambers. An oil-gas separator and an oil filter are arranged inside the filter chamber. A conduit 2 is sleeved at the liquid outlet of the oil filter, and the other end of the conduit 2 is connected to the liquid inlet pipe. There is still a right U-frame between the left heat sink and the right heat sink, and two fans are arranged inside the U-frame.

[0006] Furthermore, the surface of the fin-tube heat exchanger is provided with fins, and the fins are used to form vortices when cold air circulates.

[0007] Furthermore, an oil outlet groove is provided inside the fin-tube heat exchanger and on the surface of the liquid inlet pipe, and an oil inlet groove is provided inside the fin-tube heat exchanger and on the surface of the liquid outlet pipe.

[0008] Furthermore, the centrifugal pump structure includes a pump housing, a second motor, a turboprop and a liquid inlet, wherein the second motor is located below the pump housing, and the turboprop is fixedly sleeved on the output shaft of the second motor, and the liquid inlet is used to connect the housing with the interior of the pump housing.

[0009] Furthermore, two support frames are provided inside the shell, and the winding is fixedly installed inside the shell through the two support frames; auxiliary heat sinks are provided on the left and right side surfaces of the shell.

[0010] Furthermore, a protective shell is fixedly mounted on the surface of the U frame, and through openings are provided on both the left and right sides of the protective shell. Two swingable mounting brackets are provided inside the protective shell, and the two fans are respectively arranged inside the U frame through the two mounting brackets. A middle partition is arranged inside the U frame and between the two fans, and a circular cover is arranged outside the two fans.

[0011] Furthermore, the ends of the two mounting frames are each provided with a rotating shaft, and the other ends of the two rotating shafts penetrate into the interior of the protective shell and are sleeved with a swinging plate, and the two swinging plates are symmetrically distributed; A swing ring capable of moving left and right is arranged between the two swing disks, and ring teeth are arranged on the upper and lower sides of the swing ring, and disk teeth are arranged on the arc ends of the two swing disks, and the ring teeth are meshed and connected with the disk teeth.

[0012] Furthermore, a linear slide groove is provided inside the swing ring, and a fixed slider is fixedly installed on the central surface of the U frame, and the fixed slider is slidably connected with the linear slide groove; The left and right sides of the fixed sliding block are both fixedly connected with a return spring, and the other end of the return spring is fixedly connected to the inner surface of the swing ring.

[0013] Furthermore, four connecting columns are provided on the surface of the swing ring, and driving rings are installed at the other ends of the four connecting columns, and the driving rings and the swing rings are distributed perpendicular to each other.

[0014] Furthermore, a vertical slide groove is opened inside the driving ring, a motor 1 is installed on the surface of the protective shell, the output shaft of the motor 1 passes through the interior of the protective shell and is sleeved with a rotating part, and a column is provided at the other end of the rotating part, wherein the column is sleeved inside the vertical slide groove.

[0015] Beneficial effects: 1. The present invention monitors the temperature of the transformer in real time. When the temperature of the transformer is abnormal, the transformer is quickly cooled by cascade refrigeration technology, thereby quickly reducing the temperature of the transformer to a normal range.

[0016] 2. The present invention uses a special fin structure so that when performing convection heat dissipation, the cold air flow will form a vortex when passing through the fins with this special structure, thereby fully exchanging heat with the transformer.

[0017] 3. The present invention improves the efficiency of the fin-tube heat exchanger in removing heat from the transformer oil by means of the rapid flow of the transformer oil.

[0018] 4. The present invention uses the two fans to swing in an 'inward-feet' or 'outward-feet' pattern, and because the two fans blow air in opposite directions, this can increase the range of air circulation on the fin-tube heat exchanger, thereby improving the heat dissipation efficiency of the fin-tube heat exchanger.

[0019] 5. In the present invention, after the transformer oil with a temperature higher than the set temperature is filtered out from the oil drain port of the oil-immersed transformer through the oil filter for impurities, it is degassed in the oil-gas separator, and then enters the fin-tube heat exchanger through the oil pump, and is cooled to 10 degrees by the fan before returning to the oil filling port of the oil-immersed transformer. This cycle is repeated to achieve natural convection heat dissipation of the oil-immersed transformer and external forced convection heat dissipation to reduce the transformer temperature until it drops below the set temperature and the pump and fan are stopped. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The transformer oil circulation flow chart of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention from an upper viewing angle; Figure 3 This is a schematic diagram of the structure of the present invention from a lower viewing angle; Figure 4 is a cross-sectional view of the bottom box structure of the present invention; Figure 5 is a side sectional view of the present invention; Figure 6 It is a cross-sectional view of the fin-tube heat exchanger structure of the present invention; Figure 7 is a cross-sectional view of the protective shell structure of the present invention; Figure 8 It is a structural schematic diagram of the U frame of the present invention and the fan inside it; Fig. 9 It is a schematic diagram of the swing ring, the driving ring and the rotating member of the present invention; Fig.10 It is a schematic diagram of a motor 1 and a rotating member of the present invention; Fig.11 It is a schematic diagram of the mounting frame and the swing plate of the present invention.

[0021] In the figure: 1. Shell; 2. Bottom box; 3. Auxiliary heat sink; 4. Fin-tube heat exchanger; 5. Fin; 6. Protective shell; 7. Motor 1; 8. Liquid inlet pipe; 9. Liquid outlet pipe; 10. U-frame; 11. Support platform; 12. Conduit 1; 13. Motor 2; 14. Pump shell; 15. Turbine; 16. Liquid inlet; 17. Filter chamber; 18. Oil filter; 19. Oil-gas separator; 20. Conduit 2; 21. Support frame; 22. Winding; 23. Transformer oil; 24. Thin cavity; 25, oil inlet groove; 26, oil outlet groove; 27, rotating shaft; 28, swing plate; 29, connecting column; 30, swing ring; 31, linear slide groove; 32, disk teeth; 33, fixed slider; 34, through-hole; 35, reset spring; 36, ring teeth; 37, circular cover; 38, middle partition; 39, fan; 40, driving ring; 41, vertical slide groove; 42, column; 43, rotating part; 44, mounting frame; 401, left heat sink; 402, right heat sink. DETAILED DESCRIPTION

[0022] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1 like Figure 1 - 11, according to one aspect of the present invention, there is provided an external intelligent cloud oil-immersed transformer air-cooled cooler, comprising a housing 1, a support platform 11, a winding 22 and a transformer oil 23, a finned tube heat exchanger 4 is provided on both the front and rear surfaces of the housing 1, the finned tube heat exchanger 4 comprises a left heat sink 401 and a right heat sink 402, a liquid outlet pipe 9 and a liquid inlet pipe 8 are respectively penetrated at the upper and lower ends of the finned tube heat exchanger 4, a thin cavity 24 is provided inside the finned tube heat exchanger 4, the liquid outlet pipe 9 and the liquid inlet pipe 8 are connected through the thin cavity 24 inside the finned tube heat exchanger 4 A bottom box 2 is installed below the outer shell 1, and a centrifugal pump structure and four filter chambers 17 are provided in the bottom box 2. Four conduits 12 are connected to the surface of the centrifugal pump structure, and the other ends of the four conduits 12 respectively penetrate into the four filter chambers 17. An oil-gas separator 19 and an oil filter 18 are provided inside the filter chamber 17. A conduit 20 is sleeved at the liquid outlet of the oil filter 18, and the other end of the conduit 20 is connected to the liquid inlet pipe 8; there is still a right U-frame 10 between the left heat sink 401 and the right heat sink 402, and two fans 39 are provided inside the U-frame 10.

[0024] The working principle of this embodiment is that the transformer oil 23 inside the housing 1 will enter the interior of the pump housing 14 through the liquid inlet 16 under the action of gravity (such as Figure 4 , 5 As shown in FIG. 1 ), at this time, due to the consistent internal and external pressures and the resistance of the oil-gas separator 19, the transformer oil 23 will not flow. When the temperature of the transformer oil 23 is too high, the motor 2 13 can be started to drive the turboprop 15 to rotate at a high speed (such as Figure 4 As shown), at this time, the transformer oil 23 enters the interior of the liquid inlet pipe 8 through the conduit 1 12, the oil-gas separator 19, the oil filter 18 and the guide rail 20 (as shown in FIG. Figure 5 As shown in the figure, the transformer oil 23 in the liquid inlet pipe 8 will enter the thin cavity 24 through the oil outlet groove 26, and then flow back to the inside of the housing 1 through the oil inlet groove 25 and the liquid outlet pipe 9, thereby realizing the rapid flow of the transformer oil 23, thereby improving the efficiency of the fin-tube heat exchanger 4 in taking away the heat of the transformer oil 23.

[0025] The two fans 39 also can be started synchronously, and the rotation directions of the two fans 39 are different. When the fan 39 above blows air to the left side, the fan 39 below will blow air to the right side, which can improve the heat dissipation efficiency.

[0026] Example 2 like Figure 1 - As shown in FIG. 11, the surface of the finned tube heat exchanger 4 is provided with fins 5, and the fins 5 are used to form a vortex when the cold air circulates. An oil outlet groove 26 is provided inside the finned tube heat exchanger 4 and on the surface of the liquid inlet pipe 8, and an oil inlet groove 25 is provided inside the finned tube heat exchanger 4 and on the surface of the liquid outlet pipe 9. The centrifugal pump structure includes a pump housing 14, a motor 2 13, a turboprop 15 and a liquid inlet 16. The motor 2 13 is located below the pump housing 14, and the turboprop 15 is fixedly sleeved on the output shaft of the motor 2 13. The liquid inlet 16 is used for the housing 1 to communicate with the inside of the pump housing 14. Two support frames 21 are provided inside the housing 1, and the winding 22 is fixedly installed inside the housing 1 through the two support frames 21; auxiliary heat sinks 3 are provided on the left and right side surfaces of the housing 1.

[0027] The working principle of this embodiment is: through the special fin 5 structure, when performing convection heat dissipation, the cold air flow will form a vortex when passing through the fin 5 with this special structure, thereby fully exchanging heat with the transformer.

[0028] Example 3 like Figure 1As shown in Figure 11, a protective shell 6 is fixedly installed on the surface of the U frame 10, and a through hole 34 is provided on both the left and right sides of the protective shell 6. Two swingable mounting brackets 44 are provided inside the protective shell 6, and two fans 39 are respectively arranged inside the U frame 10 through the two mounting brackets 44; a middle partition 38 is provided inside the U frame 10 and between the two fans 39, and a circular cover 37 is provided on the outer side of the two fans 39. A rotating shaft 27 is provided at the end of the two mounting brackets 44, and the other ends of the two rotating shafts 27 penetrate into the interior of the protective shell 6 and are provided with swinging discs 28, and the two swinging discs 28 are symmetrically distributed; a swinging ring 30 that can move left and right is provided between the two swinging discs 28, and ring teeth 36 are provided on the upper and lower sides of the swinging ring 30, and disc teeth 32 are provided at the arc ends of the two swinging discs 28, and the ring teeth 36 are meshed and connected with the disc teeth 32. A linear slide groove 31 is provided inside the swing ring 30, and a fixed slider 33 is fixedly installed on the central surface of the U frame 10, and the fixed slider 33 is slidably connected to the linear slide groove 31; the left and right sides of the fixed slider 33 are fixedly connected to the return spring 35, and the other end of the return spring 35 is fixedly connected to the inner surface of the swing ring 30. Four connecting columns 29 are provided on the surface of the swing ring 30, and a driving ring 40 is installed on the other end of the four connecting columns 29, and the driving ring 40 and the swing ring 30 are distributed perpendicular to each other. A vertical slide groove 41 is provided inside the driving ring 40, and a motor 7 is installed on the surface of the protective shell 6. The output shaft of the motor 7 passes through the interior of the protective shell 6 and is sleeved with a rotating member 43. The other end of the rotating member 43 is provided with a column 42, wherein the column 42 is sleeved inside the vertical slide groove 41.

[0029] The working principle of this embodiment is as follows: after the two fans 37 are started, the motor 17 is also started. The motor 17 drives the rotating member 43 and the column 42 to rotate repeatedly. Since the column 42 is stuck inside the vertical slide 41, the column 42 will squeeze the inner wall of the vertical slide 41 when it rotates, so that the driving ring 40 can swing left and right repeatedly. And the driving ring 40 is fixedly connected to the swing ring 30 (such as Fig. 9 As shown), the swing ring 30 can drive the two swing disks 28 to swing left or right through the teeth, so that the two fans 39 can be transformed into "inner eight" or "outer eight", and because the blowing directions of the two fans 39 are opposite, this can increase the range of air circulation on the fin-tube heat exchanger 4, thereby improving the heat dissipation efficiency of the fin-tube heat exchanger 4.

[0030] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An external intelligent cloud oil-immersed transformer air-cooling cooler, comprising a housing (1), a support platform (11), a winding (22) and transformer oil (23), characterized in that: Fin-tube heat exchangers (4) are provided on both the front and rear surfaces of the housing (1), wherein the fin-tube heat exchangers (4) comprise a left heat sink (401) and a right heat sink (402); a liquid outlet pipe (9) and a liquid inlet pipe (8) are respectively provided at the upper and lower ends of the fin-tube heat exchangers (4); a thin cavity (24) is provided inside the fin-tube heat exchangers (4); and the liquid outlet pipe (9) and the liquid inlet pipe (8) are connected via the thin cavity (24) inside the fin-tube heat exchangers (4); A bottom box (2) is installed below the housing (1), a centrifugal pump structure and four filter chambers (17) are provided in the bottom box (2), the surface of the centrifugal pump structure is connected to four conduits 1 (12), the other ends of the four conduits 1 (12) respectively penetrate into the four filter chambers (17), an oil-gas separator (19) and an oil filter (18) are provided inside the filter chamber (17), a conduit 2 (20) is sleeved at the liquid outlet of the oil filter (18), the other end of the conduit 2 (20) is connected to the liquid inlet pipe (8); There is still a right U-frame (10) between the left heat sink (401) and the right heat sink (402), and two fans (39) are arranged inside the U-frame (10).

2. The external intelligent cloud oil-immersed transformer air-cooled cooler according to claim 1 is characterized in that: The surface of the fin-tube heat exchanger (4) is provided with fins (5), and the fins (5) are used to form vortices when cold air circulates.

3. The external intelligent cloud oil-immersed transformer air-cooled cooler according to claim 1 is characterized in that: An oil outlet groove (26) is provided inside the fin-tube heat exchanger (4) and on the surface of the liquid inlet pipe (8), and an oil inlet groove (25) is provided inside the fin-tube heat exchanger (4) and on the surface of the liquid outlet pipe (9).

4. The external intelligent cloud oil-immersed transformer air-cooled cooler according to claim 1 is characterized in that: The centrifugal pump structure comprises a pump housing (14), a second motor (13), a turboprop (15) and a liquid inlet (16); the second motor (13) is located below the pump housing (14), and the turboprop (15) is fixedly sleeved on the output shaft of the second motor (13); and the liquid inlet (16) is used for the housing (1) to communicate with the interior of the pump housing (14).

5. The external intelligent cloud oil-immersed transformer air-cooled cooler according to claim 1 is characterized in that: Two support frames (21) are provided inside the housing (1), and the winding (22) is fixedly mounted inside the housing (1) via the two support frames (21); auxiliary heat sinks (3) are provided on both left and right side surfaces of the housing (1).

6. The external intelligent cloud oil-immersed transformer air-cooled cooler according to claim 1 is characterized in that: A protective shell (6) is fixedly mounted on the surface of the U frame (10), and through openings (34) are provided on both left and right sides of the protective shell (6). Two swingable mounting frames (44) are provided inside the protective shell (6), and the two fans (39) are respectively arranged inside the U frame (10) via the two mounting frames (44); A middle partition plate (38) is provided inside the U frame (10) and between the two fans (39), and a circular cover (37) is provided on the outer sides of the two fans (39).

7. The external intelligent cloud oil-immersed transformer air-cooled cooler according to claim 6 is characterized in that: The ends of the two mounting frames (44) are each provided with a rotating shaft (27), and the other ends of the two rotating shafts (27) penetrate into the interior of the protective shell (6) and are sleeved with a swing plate (28), and the two swing plates (28) are symmetrically distributed; A swing ring (30) capable of moving left and right is provided between the two swing disks (28), and ring teeth (36) are provided on both upper and lower sides of the swing ring (30). Disk teeth (32) are provided on the arc ends of the two swing disks (28), and the ring teeth (36) are meshedly connected with the disk teeth (32).

8. The external intelligent cloud oil-immersed transformer air-cooled cooler according to claim 7 is characterized in that: A linear slide groove (31) is provided inside the swing ring (30), and a fixed slider (33) is fixedly installed on the central surface of the U frame (10), wherein the fixed slider (33) is slidably connected to the linear slide groove (31); The left and right sides of the fixed sliding block (33) are both fixedly connected to a return spring (35), and the other end of the return spring (35) is fixedly connected to the inner surface of the swing ring (30).

9. The external intelligent cloud oil-immersed transformer air-cooled cooler according to claim 8 is characterized in that: Four connecting columns (29) are provided on the surface of the swing ring (30), and a driving ring (40) is installed at the other end of the four connecting columns (29), wherein the driving ring (40) and the swing ring (30) are arranged perpendicular to each other.

10. The external intelligent cloud oil-immersed transformer air-cooled cooler according to claim 9 is characterized in that: A vertical slide groove (41) is provided inside the driving ring (40), a motor (7) is mounted on the surface of the protective shell (6), an output shaft of the motor (7) passes through the interior of the protective shell (6) and is sleeved with a rotating member (43), a column (42) is provided at the other end of the rotating member (43), wherein the column (42) is sleeved inside the vertical slide groove (41).

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