Conjugated double-split boost dry-type transformer for photovoltaic inversion

Abstract

The invention relates to the technical field of transformers, and provides a conjugated double-split boost dry-type transformer for photovoltaic inversion. The air cooling box is fixedly mounted at the top of the bottom plate and used for placing a transformer; the dry-type transformer is fixedly mounted in the air cooling box; the water tank is fixedly mounted at the top of the bottom plate and used for water-cooling heat dissipation; the heat dissipation structure is fixedly arranged above the bottom plate and is used for dissipating heat of the dry-type transformer; the heat dissipation structure comprises a heat absorption plate fixedly installed on the bottom face in the air cooling box, a heat absorption copper pipe fixedly installed in the heat absorption plate and an air outlet pipe fixedly installed on the top of the air cooling box. By means of the water pump, the heat absorption copper pipe and the heat dissipation copper pipe, when the water pump is started, cooling liquid filled in the heat absorption copper pipe and the heat dissipation copper pipe rapidly flows, then heat in the air cooling box is absorbed, then the heat is transmitted into the water tank, the temperature of the dry-type transformer is reduced, and the service life of the dry-type transformer is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of transformers, and particularly relates to a conjugate type double-split step-up dry-type transformer for photovoltaic inversion. BACKGROUND

[0002] The dry-type transformer takes air or gas as a cooling medium, and the iron core and winding are not immersed in insulating oil, and voltage transformation is achieved through electromagnetic induction. The core structure includes an iron core (usually made of high-quality silicon steel sheets), a winding (wound with oxygen-free copper or aluminum wire), and an insulating material (such as epoxy resin), and has the advantages of no oil, no pollution, moisture resistance, and easy maintenance. The working principle is the same as that of the oil-immersed transformer, but the insulating medium is air, which avoids the risk of oil leakage and pollution. Dry-type transformers are widely used in local lighting, high-rise buildings, airports, and CNC mechanical equipment sites. In simple terms, a dry-type transformer is a transformer in which the iron core and winding are not immersed in insulating oil, and the purpose is to effectively utilize photovoltaic energy.

[0003] It is known that the authorized patent with application number CN202420890835.8 discloses a conjugate type double-split step-up dry-type transformer for photovoltaic inversion: a base is provided with a plurality of lifting feet symmetrically arranged on the lower end face, a plurality of through holes are provided on the base, a plurality of threaded columns are threaded through the through holes, a transformer body is fixedly connected to the upper end faces of the threaded columns, mounting nuts are threadedly connected to the ends of the threaded columns away from the transformer body, a plurality of limiting seats are fixedly connected to the upper end face of the base, limiting grooves are arranged on the side walls of the limiting seats, limiting blocks are slidably connected to the limiting grooves, and a grid frame is fixedly connected between the limiting blocks. The transformer body is arranged in the grid frame. In the above-mentioned invention, the staff can conveniently complete the installation and placement of the transformer body, and the safety of the transformer body during operation is ensured.

[0004] However, in the implementation of the related technology, it is found that the above technical solution has the following problems: the dry-type transformer is not cooled by using insulating oil during use, and the insulation of the dry-type transformer is easily aged in high-temperature weather, thereby reducing the service life of the dry-type transformer.

[0005] Therefore, a conjugate type double-split step-up dry-type transformer for photovoltaic inversion is proposed to solve the above problems. SUMMARY

[0006] The present application proposes a conjugate type double-split step-up dry-type transformer for photovoltaic inversion, which solves the problem that the dry-type transformer in the related art is easily aged in high-temperature weather, thereby reducing the service life of the dry-type transformer.

[0007] The technical scheme of the present application is as follows: a conjugated double-split boost dry-type transformer for photovoltaic inversion comprises: a bottom plate; an air-cooled box fixedly installed on the top of the bottom plate and used for placing the transformer; a dry-type transformer fixedly installed in the air-cooled box; a water tank fixedly installed on the top of the bottom plate and used for water-cooling heat dissipation; a heat dissipation structure fixedly arranged above the bottom plate and used for heat dissipation of the dry-type transformer; The heat dissipation structure comprises a heat absorption plate fixedly installed on the bottom surface of the air-cooled box, heat absorption copper pipes fixedly installed in the heat absorption plate, an air outlet pipe fixedly installed on the top of the air-cooled box, a first fan fixedly installed in the air outlet pipe, a first protective net fixedly installed on the top end of the air outlet pipe, a heat dissipation box fixedly installed on one side of the water tank, heat dissipation fins fixedly installed in the water tank and the heat dissipation box, heat dissipation copper pipes fixedly installed in the heat dissipation box, a first air inlet fixedly installed on one side of the heat dissipation box, a second fan fixedly installed in the first air inlet, a second protective net fixedly installed on one side of the first air inlet, and a water pump fixedly installed on one side of the air-cooled box.

[0008] Preferably, the dry-type transformer comprises a clamping piece fixedly installed in the air-cooled box, an iron core fixedly arranged in the clamping piece, a low-voltage coil fixedly arranged outside the iron core, a high-voltage coil fixedly arranged outside the low-voltage coil, a ventilation pipe fixedly arranged outside the high-voltage coil, a high-voltage terminal fixedly installed on one side of the clamping piece, a high-voltage connecting rod fixedly connected to one end of the high-voltage terminal, a plurality of high-voltage taps fixedly installed on one side of the ventilation pipe, a high-voltage connecting piece fixedly connected to one end of the high-voltage taps, and a low-voltage outlet copper bar fixedly arranged in the ventilation pipe.

[0009] Preferably, a second air inlet is formed in a position close to the bottom surface of the air-cooled box, the second air inlet faces the heat absorption plate, and the number of heat absorption plates is multiple.

[0010] Preferably, the heat absorption copper pipes pass through the multiple heat absorption plates, the heat dissipation copper pipes pass through the multiple heat dissipation fins, and the heat absorption copper pipes and the heat dissipation copper pipes are filled with cooling liquid in the interiors.

[0011] Preferably, the number of heat dissipation fins is multiple, and the multiple heat dissipation fins are installed in the interiors of the water tank and the heat dissipation box in a linear array.

[0012] Preferably, a support beam is fixedly installed at the bottom of the dry-type transformer, and the dry-type transformer is arranged directly above the heat absorption plate.

[0013] Preferably, the output end of the water pump is connected to one end of the heat dissipation copper pipes, the input end of the water pump is connected to one end of the heat absorption copper pipes, the other end of the heat dissipation copper pipes is connected to the other end of the heat absorption copper pipes.

[0014] Preferably, the support beam is a vacuum casting type filled with short glass fiber felt, and the dry-type transformer is not in direct contact with the heat absorption plate and the air-cooled box.

[0015] Preferably, the number of the first air fans and the second air fans is three, and the three second air fans are installed in a linear array inside the first air inlet, and the three first air fans are arranged inside the three air outlet pipes.

[0016] The working principle and advantages of the present application are as follows: through the water pump, the heat absorption copper pipe and the heat dissipation copper pipe, when the water pump is started, the heat absorption copper pipe and the heat dissipation copper pipe are filled with cooling liquid flowing quickly, thereby absorbing the heat in the air-cooled box, and then transferring to the inside of the water tank, thereby reducing the temperature on the dry-type transformer and prolonging the service life of the dry-type transformer. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a sectional view of the overall structure of the air outlet pipe of the present application; Figure 3 It is a sectional view of the overall structure of the air-cooled box of the present application; Figure 2 It is a sectional view of the overall structure of the air-cooled box of the present application; Figure 4 It is a sectional view of the overall structure of the air-cooled box of the present application; Figure 5 It is a sectional view of the overall structure of the air-cooled box of the present application; Figure 6 It is a sectional view of the overall structure of the air-cooled box of the present application; Figure 5 It is a sectional view of the overall structure of the air-cooled box of the present application; Figure 7 It is a sectional view of the overall structure of the air-cooled box of the present application;

[0019] In the figure: 1, bottom plate; 2, air-cooled box; 3, water tank; 4, heat absorption plate; 5, heat absorption copper pipe; 6, air outlet pipe; 7, first air fan; 8, first protective net; 9, heat dissipation box; 10, heat dissipation fin; 11, heat dissipation copper pipe; 12, first air inlet; 13, second air fan; 14, second protective net; 15, water pump; 16, clamping piece; 17, iron core; 18, low-voltage coil; 19, high-voltage coil; 20, ventilation pipe; 21, high-voltage terminal; 22, high-voltage connecting rod; 23, high-voltage tapping; 24, second air inlet; 25, low-voltage outlet copper bar. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work, are within the protection scope of the present application.

[0021] Embodiments Please refer to Figure 1 -7, a conjugate double-split boost dry transformer for photovoltaic inversion, comprising: a bottom plate 1; an air-cooled box 2 fixedly installed on the top of the bottom plate 1, used for placing the transformer; a dry transformer fixedly installed inside the air-cooled box 2; a water tank 3 fixedly installed on the top of the bottom plate 1, used for water-cooling heat dissipation; a heat dissipation structure fixedly arranged above the bottom plate 1, used for heat dissipation of the dry transformer; the heat dissipation structure comprises a heat absorption plate 4 fixedly installed on the bottom surface inside the air-cooled box 2, a heat absorption copper pipe 5 fixedly installed inside the heat absorption plate 4, an air outlet pipe 6 fixedly installed on the top of the air-cooled box 2, a first fan 7 fixedly installed inside the air outlet pipe 6, a first protective net 8 fixedly installed on the top end of the air outlet pipe 6, a heat dissipation box 9 fixedly installed on one side of the water tank 3, heat dissipation fins 10 fixedly installed inside the water tank 3 and the heat dissipation box 9, a heat dissipation copper pipe 11 fixedly installed inside the heat dissipation box 9, a first air inlet 12 fixedly installed on one side of the heat dissipation box 9, a second fan 13 fixedly installed inside the first air inlet 12, a second protective net 14 fixedly installed on one side of the first air inlet 12, and a water pump 15 fixedly installed on one side of the air-cooled box 2.

[0022] The technical scheme provided by the embodiment is as follows: in use, first, the water pump 15 is started, the cooling liquid in the heat absorption copper pipe 5 and the heat dissipation copper pipe 11 is caused to flow, the heat absorption plate 4 and the heat absorption copper pipe 5 absorb heat in the air near the heat absorption plate 4, the heat is transmitted to the inside of the heat dissipation copper pipe 11 through the cooling liquid in the heat absorption copper pipe 5, the heat is transmitted to the water in the water tank 3 in the heat dissipation copper pipe 11, the heat in the water is conducted to the air in the heat dissipation tank 9 through the heat dissipation fins 10, then the second fan 13 is started to suck air from the first air inlet 12, and the hot air in the heat dissipation tank 9 is taken away, then the first fan 7 is started to take away the hot air in the air-cooled tank 2, and negative pressure is generated after the hot air in the air-cooled tank 2 is taken away by the first fan 7, and then air is sucked from the second air inlet 24, the air first passes through the heat absorption plate 4 and the heat absorption copper pipe 5, and then the heat in the air is absorbed by the heat absorption plate 4 and the heat absorption copper pipe 5, the cold air with the heat absorbed moves upward along the ventilation pipe 20, and then the heat in the dry-type transformer is taken away, and the temperature of the dry-type transformer is reduced, and then the cold air with the heat absorbed becomes hot air and is discharged from the air outlet pipe 6.

[0023] Further, the dry-type transformer comprises a clamping piece 16 fixedly installed in the air-cooled tank 2, an iron core 17 fixedly arranged in the clamping piece 16, a low-voltage coil 18 fixedly arranged outside the iron core 17, a high-voltage coil 19 fixedly arranged outside the low-voltage coil 18, a ventilation pipe 20 fixedly arranged outside the high-voltage coil 19, a high-voltage terminal 21 fixedly installed on one side of the clamping piece 16, a high-voltage connecting rod 22 fixedly connected to one end of the high-voltage terminal 21, a plurality of high-voltage taps 23 fixedly installed on one side of the ventilation pipe 20, and a high-voltage connecting piece fixedly connected to one end of the high-voltage tap 23.

[0024] Specifically, by arranging the ventilation pipe 20 outside the high-voltage coil 19, air can be sucked from the second air inlet 24 when the first fan 7 is started, and then the air flows through the high-voltage coil 19 and the low-voltage coil 18 through the ventilation pipe 20, the hot air between the high-voltage coil 19 and the low-voltage coil 18 is taken away, the hot air is prevented from accumulating, and the temperature rise in the dry-type transformer is prevented from affecting the service life of the dry-type transformer.

[0025] Further, the second air inlet 24 is arranged at a position close to the ground in the air-cooled tank 2, the second air inlet 24 faces the heat absorption plate 4, and the number of the heat absorption plates 4 is multiple.

[0026] Specifically, by fixing the plurality of heat absorption plates 4 on the inner bottom surface of the air cooling box 2, and also by making the second air inlet 24 face the heat absorption plates 4, the air entering the air cooling box 2 from the second air inlet 24 can pass through the plurality of heat absorption plates 4, so that the heat absorption plates 4 absorb the heat in the air, and then the cold air blows through the dry-type transformer to cool the dry-type transformer.

[0027] Further, the heat absorption copper pipes 5 pass through the plurality of heat absorption plates 4, and the heat dissipation copper pipes 11 pass through the plurality of heat dissipation fins 10, and the interiors of the heat absorption copper pipes 5 and the heat dissipation copper pipes 11 are filled with cooling liquid.

[0028] Specifically, by filling the cooling liquid in the interiors of the heat absorption copper pipes 5 and the heat dissipation copper pipes 11, the heat on the heat absorption plates 4 can be quickly taken away and then dissipated through the heat dissipation fins 10, so as to quickly reduce the temperature in the air cooling box 2, and then reduce the temperature of the dry-type transformer.

[0029] Further, the plurality of heat dissipation fins 10 are linearly arranged in the interiors of the water tank 3 and the heat dissipation box 9.

[0030] Specifically, by linearly arranging the plurality of heat dissipation fins 10 in the interiors of the water tank 3 and the heat dissipation box 9, the heat in the water tank 3 can be conducted to the interior of the heat dissipation box 9 through the heat dissipation fins 10, and then taken away by the wind blown by the second fan 13.

[0031] Further, the bottom of the dry-type transformer is fixedly installed with a support beam, and the dry-type transformer is arranged directly above the heat absorption plates 4.

[0032] Specifically, by arranging the dry-type transformer directly above the heat absorption plates 4, the cold air passing through the heat absorption plates 4 can directly blow from the bottom to the top of the dry-type transformer, so as to take away the hot air in the dry-type transformer.

[0033] Further, the output end of the water pump 15 is connected with one end of the heat dissipation copper pipe 11, the input end is connected with one end of the heat absorption copper pipe 5, and the other end of the heat dissipation copper pipe 11 is connected with the other end of the heat absorption copper pipe 5.

[0034] Specifically, by connecting the output end of the water pump 15 with one end of the heat dissipation copper pipe 11 and the input end with one end of the heat absorption copper pipe 5, when the water pump 15 is started, the cooling liquid in the interiors of the heat absorption copper pipe 5 and the heat dissipation copper pipe 11 can flow quickly, so as to absorb the heat in the air cooling box 2 and then transfer to the interior of the water tank 3.

[0035] Further, the support beam is a vacuum casting type with short glass fiber felt as filler, and the dry-type transformer does not directly contact the heat absorption plates 4 and the air cooling box 2.

[0036] Specifically, by making the dry-type transformer not in direct contact with the heat absorption plate 4 and the air-cooled box 2, and the support beam is a short glass fiber felt filler vacuum casting type, the dry-type transformer can be insulated to prevent dry-type transformer leakage.

[0037] Further, the number of the first fan 7 and the second fan 13 is three, and the three second fans 13 are linearly arranged in the interior of the first air inlet 12, and the three first fans 7 are respectively arranged in the interior of the three air outlet pipes 6.

[0038] Specifically, by arranging the three second fans 13 in the interior of the first air inlet 12 in a linear array, the air circulation in the interior of the heat dissipation box 9 can be accelerated, and the heat conducted by the heat dissipation fins 10 to the air can be quickly taken away; and by arranging the three first fans 7 in the interior of the three air outlet pipes 6, the air flow rate in the interior of the air-cooled box 2 can be accelerated, so that the cold air can quickly cool the dry-type radiator.

[0039] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A conjugate double-split step-up dry-type transformer for photovoltaic inverters, characterized in that, include: Base plate (1); A wind-cooled box (2) is fixedly installed on the top of the base plate (1) for placing the transformer; A dry-type transformer fixedly installed inside the air-cooled box (2); A water tank (3) is fixedly installed on the top of the base plate (1) for water cooling. A heat dissipation structure fixedly installed above the base plate (1) is used to dissipate heat from the dry-type transformer; The heat dissipation structure includes a heat-absorbing plate (4) fixedly installed on the bottom surface inside the air-cooled box (2), a heat-absorbing copper pipe (5) fixedly installed inside the heat-absorbing plate (4), an air outlet pipe (6) fixedly installed on the top of the air-cooled box (2), a first fan (7) fixedly installed inside the air outlet pipe (6), a first protective net (8) fixedly installed on the top of the air outlet pipe (6), a heat dissipation box (9) fixedly installed on one side of the water tank (3), heat dissipation fins (10) fixedly installed inside the water tank (3) and the heat dissipation box (9), a heat dissipation copper pipe (11) fixedly installed inside the heat dissipation box (9), a first air inlet (12) fixedly installed on one side of the heat dissipation box (9), a second fan (13) fixedly installed inside the first air inlet (12), a second protective net (14) fixedly installed on one side of the first air inlet (12), and a water pump (15) fixedly installed on one side of the air-cooled box (2).

2. The conjugate double-split step-up dry-type transformer for photovoltaic inverters according to claim 1, characterized in that: The dry-type transformer includes a clamping member (16) fixedly installed inside the air-cooled box (2), an iron core (17) fixedly installed inside the clamping member (16), a low-voltage coil (18) fixedly installed outside the iron core (17), a high-voltage coil (19) fixedly installed outside the low-voltage coil (18), a ventilation pipe (20) fixedly installed outside the high-voltage coil (19), a high-voltage terminal (21) fixedly installed on one side of the clamping member (16), a high-voltage connecting rod (22) fixedly connected to one end of the high-voltage terminal (21), multiple high-voltage taps (23) fixedly installed on one side of the ventilation pipe (20), a high-voltage connecting piece fixedly connected to one end of the high-voltage tap (23), and a low-voltage outgoing copper busbar (25) fixedly installed inside the ventilation pipe (20).

3. The conjugate double-split step-up dry-type transformer for photovoltaic inverters according to claim 1, characterized in that: The air-cooled box (2) has a second air inlet (24) located near the ground inside. The second air inlet (24) is directly opposite the heat absorption plate (4), and there are multiple heat absorption plates (4).

4. The conjugate double-split step-up dry-type transformer for photovoltaic inverters according to claim 1, characterized in that: The heat-absorbing copper tube (5) passes through multiple heat-absorbing plates (4), and the heat-dissipating copper tube (11) passes through multiple heat-dissipating fins (10). The interiors of the heat-absorbing copper tube (5) and the heat-dissipating copper tube (11) are filled with coolant.

5. The conjugate double-split step-up dry-type transformer for photovoltaic inverters according to claim 1, characterized in that: There are multiple heat dissipation fins (10), and the multiple heat dissipation fins (10) are installed in a linear array inside the water tank (3) and the heat dissipation box (9).

6. The conjugate double-split step-up dry-type transformer for photovoltaic inverters according to claim 1, characterized in that: The bottom of the dry-type transformer is fixedly installed with a support beam, and the dry-type transformer is positioned directly above the heat absorption plate (4).

7. The conjugate double-split step-up dry-type transformer for photovoltaic inverters according to claim 1, characterized in that: The output end of the water pump (15) is connected to one end of the heat dissipation copper pipe (11), the input end is connected to one end of the heat absorption copper pipe (5), and the other end of the heat dissipation copper pipe (11) is connected to the other end of the heat absorption copper pipe (5).

8. The conjugate double-split step-up dry-type transformer for photovoltaic inverters according to claim 6, characterized in that: The support beam is a vacuum-cast type with short glass fiber felt as filler, and the dry-type transformer does not directly contact the heat-absorbing plate (4) and the air-cooled box (2).

9. The conjugate double-split step-up dry-type transformer for photovoltaic inverters according to claim 1, characterized in that: The number of the No. 1 fan (7) and the No. 2 fan (13) are both three, and the three No. 2 fans (13) are installed in a linear array inside the No. 1 air inlet (12), and the three No. 1 fans (7) are respectively installed inside the three air outlet pipes (6).

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