Novel dry-type grounding transformer coil structure

Abstract

The utility model discloses a novel dry-type grounding transformer coil structure which comprises a protective shell and a dry-type transformer body arranged in the protective shell, and an air inlet and an air outlet are formed in the two opposite sides of the protective shell. The outer side of the dry-type transformer main body is further provided with a heat dissipation assembly used for assisting in cooling treatment of the dry-type transformer main body, the design structure is reasonable, a plurality of heat conduction rings are arranged on the outer side of the dry-type transformer main body, a first heat dissipation plate is arranged at the air outlet in the outer portion of the protection shell, and then the heat conduction rings and the first heat dissipation plate are communicated through a circulation pipeline; heat on the dry-type transformer body is conducted to the outside of the protective shell through a heat conduction ring and a first heat dissipation plate and diffused into the air under the action of airflow, auxiliary heat dissipation is carried out on the dry-type transformer body, and the problem that when an existing dry-type transformer is in a poor air flowing environment, the temperature in the protective shell is prone to being too high, and the service life of the dry-type transformer body is prolonged is solved. And the temperature of the dry-type transformer main body is too high.

Description

Technical Field

[0001] This utility model relates to the field of dry-type transformer technology, specifically a novel dry-type grounding transformer coil structure. Background Technology

[0002] Dry-type transformers use gas or polymer insulating materials as the insulating medium, such as epoxy resin cast dry-type transformers. However, although epoxy resin dry-type transformers have a certain impact resistance, they are exposed to the outside for a long time after installation. When subjected to external impacts, they are still prone to significant damage. Therefore, in some environments, protective shells are required for protection.

[0003] Chinese utility model patent CN222530140U discloses an impact-resistant epoxy resin cast dry-type transformer. By setting a protective shell on the outside of the main body of the dry-type transformer, the protective shell isolates it from the outside and achieves the effect of impact protection. Although the outside of the protective shell is also provided with heat dissipation vents to allow air exchange between the inside and outside of the protective shell and to dissipate heat from the main body of the dry-type transformer, the addition of the protective shell, although it can achieve the effect of impact protection, dry-type transformers do not have insulating oil for heat conduction. In some environments with poor air circulation, the temperature inside the protective shell is prone to overheating, which in turn causes the temperature of the main body of the dry-type transformer to be too high. In severe cases, it may lead to damage and a reduction in service life. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a novel dry-type grounding transformer coil structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A novel dry-type grounding transformer coil structure includes a protective shell and a dry-type transformer body disposed inside the protective shell. Air inlets and air outlets are provided on opposite sides of the protective shell.

[0007] A heat dissipation component is also installed on the outside of the dry-type transformer body to assist in cooling the dry-type transformer body.

[0008] The heat dissipation assembly includes several hollow heat-conducting rings and several hollow first heat dissipation plates. The heat-conducting rings are all sleeved on the outside of the dry-type transformer body, and the first heat dissipation plates are all installed on the outside of the protective shell and located at the air outlet.

[0009] The protective shell is also connected to a circulation pipeline that spans the inside and outside of the protective shell. The two ends of the circulation pipeline are respectively connected to several first heat dissipation plates and several heat conduction rings, so that the heat conduction fluid circulates in the first heat dissipation plates and heat conduction rings through the circulation pipeline, which is used to assist the dry-type transformer body in conducting heat to the outside of the protective shell.

[0010] The protective shell also has a first driving structure inside, which guides the air inside the protective shell to flow out through the gaps between several first heat dissipation plates at the air outlet.

[0011] Furthermore, the dry-type transformer body is equipped with a coil assembly, which is integrally molded from epoxy resin.

[0012] Furthermore, the coil assembly includes an inner coil and an outer coil disposed outside the inner coil. An air passage is also provided between the inner coil and the outer coil, and the terminals of the inner coil and the outer coil are located on the same side.

[0013] Furthermore, a third connecting pipe is provided at both the top and bottom of the first heat sink. A retractable support column is provided on one side of the end of the third connecting pipe. One end of the support column is connected to the protective shell and is used to adjust the distance between the first heat sink and the air outlet.

[0014] Furthermore, the heat-conducting ring is C-shaped, and the inner side of the heat-conducting ring is in contact with the outer side of the coil assembly;

[0015] The circulation pipeline includes a first connecting pipe, and both ends of the heat-conducting ring are provided with a first connecting pipe. Several heat-conducting rings on the outside of a set of coil assemblies are connected through the first connecting pipe.

[0016] The bottoms of the two first connecting pipes are respectively connected to the fourth connecting pipe and the second connecting pipe, and one end of the second connecting pipe and the fourth connecting pipe penetrates the side wall of the protective shell. The end of the second connecting pipe and the end of the fourth connecting pipe located outside the protective shell are respectively connected to one end of the upper third connecting pipe and one end of the lower third connecting pipe.

[0017] The second connecting pipe is also equipped with a second driving structure for driving fluid flow.

[0018] Furthermore, each of the first heat sinks has a second heat sink slidably connected inside it. The side of the second heat sink away from the protective shell passes through the first heat sink to increase the heat dissipation area.

[0019] Furthermore, a fixing block is provided on one side of each of the first heat sinks, and a control rod is provided on each fixing block, with the bottom of the control rod in contact with the second heat sink.

[0020] The fixing block is also equipped with a locking structure for fixing the control lever.

[0021] Furthermore, a storage box is provided at the top of the third connecting pipe at the top, and a control valve is provided at the top of the storage box for evacuating or inflating the inside of the storage box.

[0022] The storage box has a sliding control component inside, which is used to divide the interior of the storage box into upper and lower cavities;

[0023] The lower cavity is connected to the third connecting pipe at the top, so that the movement of several second heat sinks can be controlled by the up and down movement of the drive control component.

[0024] Furthermore, the control assembly includes a first sealing plate and a second sealing plate. The outer sides of both the first and second sealing plates are slidably connected to the inner wall of the storage box, and the first and second sealing plates are connected by an elastic element to provide a buffering effect.

[0025] Compared with existing technologies, this novel dry-type grounding transformer coil structure has the following advantages:

[0026] I. This utility model provides several heat-conducting rings on the outside of the dry-type transformer body and a first heat dissipation plate at the air outlet outside the protective shell. The heat is then conducted to the outside of the protective shell through the heat-conducting rings and the first heat dissipation plate via a circulation pipeline. The heat is then diffused into the air by the airflow, thus assisting in the heat dissipation of the dry-type transformer body. This solves the problem that existing dry-type transformers are prone to overheating inside the protective shell in environments with poor airflow, which in turn leads to excessively high temperatures in the dry-type transformer body.

[0027] Second, this utility model has a second heat dissipation plate inside the first heat dissipation plate, with one side of the second heat dissipation plate extending to the outside of the first heat dissipation plate. This allows the second heat dissipation plate to move to the outside of the first heat dissipation plate, increasing the contact surface with the outside and improving the heat dissipation effect. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal distribution of the protective shell in this utility model;

[0030] Figure 3 In this utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0031] Figure 4 This is a three-dimensional structural diagram of the main body of the dry-type transformer in this utility model;

[0032] Figure 5 This is a cross-sectional view of the storage box in this utility model;

[0033] Figure 6 This is a cross-sectional view of the first heat sink in this utility model;

[0034] Figure 7 This is a schematic diagram of the grounding transformer wiring principle in this utility model;

[0035] Figure 8 This is the structure of the grounding transformer coil in this utility model.

[0036] In the diagram: 1. Protective shell; 2. Dry-type transformer body; 3. First sealing plate; 4. Heat-conducting ring; 5. First heat dissipation plate; 6. Second heat dissipation plate; 7. Control rod; 8. Control board; 9. Fixing block; 10. Storage box; 11. First connecting pipe; 12. Second connecting pipe; 13. Third connecting pipe; 14. Fourth connecting pipe; 15. Second sealing plate; 16. Outer coil; 17. Inner coil; 18. Air passage. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] like Figure 1-8 As shown, this utility model provides a technical solution: a novel dry-type grounding transformer coil structure, including a protective shell 1 and a dry-type transformer body 2 disposed inside the protective shell 1. Air inlets and outlets are provided on opposite sides of the protective shell 1. A heat dissipation assembly is also provided on the outer side of the dry-type transformer body 2 to assist in cooling the dry-type transformer body 2. The heat dissipation assembly includes several hollow heat-conducting rings 4 and several hollow first heat dissipation plates 5. The heat-conducting rings 4 are all sleeved on the outer side of the dry-type transformer body 2, and the first heat dissipation plates 5 are all installed on the protective shell 1. The outer side of the shell 1 is located at the air outlet; the protective shell 1 is also connected to a circulation pipe that spans the inside and outside of the protective shell 1, and the two ends of the circulation pipe are respectively connected to the inside of several first heat dissipation plates 5 and several heat conduction rings 4, so that the heat conduction fluid circulates in the first heat dissipation plates 5 and heat conduction rings 4 through the circulation pipe, which is used to assist the dry-type transformer body 2 in conducting heat to the outside of the protective shell 1; the inside of the protective shell 1 is also provided with a first driving structure, which is used to guide the air inside the protective shell 1 to flow out through the gaps of several first heat dissipation plates 5 at the air outlet.

[0039] During use, the circulation pipeline is filled with an insulating liquid heat-conducting medium. The first driving structure is a fan, with the air outlet and air inlet symmetrically arranged. The fan is located at the air outlet, causing it to work and blow the air inside the protective shell 1 outwards, allowing external air to flow in through the air inlet. This assists in the air circulation inside the protective shell 1 and accelerates the air circulation through the gaps in the first heat sink 5, allowing the heat on the first heat sink 5 to dissipate into the air. The cooled fluid then flows back to the heat-conducting ring 4 through the circulation pipeline. The heat-conducting ring 4 contacts the surface of the dry-type transformer body 2, absorbing the heat from the surface of the dry-type transformer body 2, improving the heat dissipation effect of the dry-type transformer body 2, and preventing overheating. Filters are installed at both the air inlet and air outlet. A cable inlet is located at the bottom of the protective shell 1.

[0040] The dry-type transformer body 2 is equipped with a coil assembly, which is integrally molded from epoxy resin. The coil assembly includes an inner coil 17 and an outer coil 16 located outside the inner coil 17. An air passage 18 is also provided between the inner coil 17 and the outer coil 16, and the terminals of the inner coil 17 and the outer coil 16 are located on the same side. In use, the inner and outer coils 16 are integrally molded from resin to make the distance between the coil ends and the core smaller than that of a traditional grounding transformer, reduce the number of insulators used, and decrease the overall size. The high-voltage windings of coil 16 are AX, BY, and CZ; the low-voltage windings of inner coil 17 are A'-X', B'-Y', and C'-Z'; taps are 2, 4, 6, 3, 5, and 7. During connection, winding terminals A', B', and C' are connected to the neutral point N and grounded. Corresponding winding terminals X' and Z' are connected, X and Y' are connected, and Y and Z' are connected. When voltage regulation is required, the winding turns ratio is changed through the winding taps to adjust the output voltage and ensure voltage stability.

[0041] The first heat sink 5 is provided with a third connecting pipe 13 at both the top and bottom. A retractable support column is provided on one side of the end of the third connecting pipe 13. One end of the support column is connected to the protective shell 1 and is used to adjust the distance between the first heat sink 5 and the air outlet. In use, the distance between the first heat sink 5 and the protective shell 1 is adjusted by the retractable support column, so that the first heat sink 5 can be moved away from the air outlet, and the dust screen at the air outlet can be cleaned and replaced. Specifically, the retractable support column can be composed of three support columns, each of which is connected by two sleeves. One end of the first sleeve is fixed to the protective shell 1, one end of the second sleeve is inserted into the first sleeve, and the other end is fixedly connected to the third connecting pipe 13. The fourth support column is composed of a threaded rod and a threaded sleeve connected by threads. The threaded rod is rotatably connected to the third connecting pipe 13, and the end of the threaded sleeve away from the threaded rod is fixedly connected to the protective shell 1. By rotating the threaded rod, the threaded rod passes through the thread between the threaded rod and the threaded sleeve, so that the third connecting pipe 13 is moved away from the protective shell 1, thereby realizing the adjustment of the distance.

[0042] The heat-conducting ring 4 is C-shaped, and its inner side is in contact with the outer side of the coil assembly. The circulation pipeline includes a first connecting pipe 11, and both ends of the heat-conducting ring 4 are provided with a first connecting pipe 11. The first connecting pipe 11 connects several heat-conducting rings 4 on the outer side of a group of coil assemblies. The bottoms of the two first connecting pipes 11 are respectively connected to a fourth connecting pipe 14 and a second connecting pipe 12. One end of the second connecting pipe 12 and the fourth connecting pipe 14 penetrates the side wall of the protective shell 1. The end of the second connecting pipe 12 and the end of the fourth connecting pipe 14 located outside the protective shell 1 are respectively connected to one end of the upper third connecting pipe 13 and one end of the lower third connecting pipe 13. A second driving structure is also provided on the second connecting pipe 12 for driving fluid flow.

[0043] In use, the second driving structure is a centrifugal circulating pump, which is installed outside the protective shell 1. The pump body drives the fluid to circulate, so that the fluid circulates within the first heat sink 5 and the heat conduction ring 4. At the heat conduction ring 4, the heat on the surface of the coil assembly is conducted to the fluid through the heat conduction ring 4, and then enters the first heat sink 5 through the first connecting pipe 11 and the second connecting pipe 12. The heat is conducted to the outside of the protective shell 1 through the first heat sink 5. At the same time, the fluid inside the first heat sink 5 re-enters the heat conduction ring 4. This process is repeated to achieve auxiliary cooling of the coil assembly and prevent overheating.

[0044] Several first heat sinks 5 are slidably connected to the interior of each second heat sink 6. The side of the second heat sink 6 away from the protective shell 1 penetrates the first heat sink 5 to increase the heat dissipation area. In use, the second heat sink 6 is T-shaped and a sealing ring is provided on the part that contacts the inner wall of the first heat sink 5 to prevent leakage. By moving the second heat sink 6 to the outside of the first heat sink 5, the contact surface between the first heat sink 5 and the second heat sink 6 and the outside is increased, thereby improving the heat dissipation effect.

[0045] Each of the first heat sinks 5 has a fixing block 9 on one side, and each fixing block 9 has a control rod 7. The bottom of the control rod 7 contacts the second heat sink 6. The fixing block 9 also has a locking structure for fixing the control rod 7. In use, there are several control rods 7. One control rod 7 has a partial thread and is threadedly connected to the corresponding fixing block 9. The remaining control rods 7 are slidably connected to the fixing block 9. All the control rods 7 pass through the control plate 8 and are rotatably connected to the control plate 8, so that by moving one control rod 7, the control plate 8 can drive the remaining control rods 7 to move up and down. Specifically, by rotating the threaded control rod 7, the control rod 7 moves on the fixing block 9 through the thread. Then, the control plate 8 drives the remaining control rods 7 to move up and down. The self-locking effect of the thread prevents the control rod 7 from moving up and down on its own, so that the control rod 7 presses against the second heat sink 6 and fixes the second heat sink 6.

[0046] A storage tank 10 is mounted on top of the third connecting pipe 13 at the top. A control valve is mounted on top of the storage tank 10 for evacuating or inflating the interior of the storage tank 10. A control component is slidably connected inside the storage tank 10 to divide its interior into upper and lower cavities. The lower cavity communicates with the third connecting pipe 13 at the top, allowing the movement of several second heat sinks 6 to be controlled by moving the control component up and down. In use, an external inflation device is used via the control valve to pressurize the area above the control component, causing it to move downwards and compress the fluid inside the storage tank 10 into the first heat sink 5, thus pushing the second heat sink... Plate 6 moves outward toward the first heat sink 5 to achieve pressure balance, enabling simultaneous control of multiple second heat sinks 6 and improving control efficiency; the control component includes a first sealing plate 3 and a second sealing plate 15. The outer sides of both the first sealing plate 3 and the second sealing plate 15 are slidably connected to the inner wall of the storage box 10, and the first sealing plate 3 and the second sealing plate 15 are connected by an elastic element to play a buffering role; during use, if the fluid temperature is too high, causing internal pressure to fluctuate, the second sealing plate 15 can be pushed to squeeze the elastic element to play a buffering role. The elastic element is a spring, and its two ends are fixedly connected to the first sealing plate 3 and the second sealing plate 15.

Claims

1. A novel dry-type grounding transformer coil structure, comprising a protective shell (1) and a dry-type transformer body (2) disposed inside the protective shell (1), wherein air inlets and air outlets are provided on opposite sides of the protective shell (1); Its features are: The dry-type transformer body (2) is also provided with a heat dissipation component on the outside to assist the dry-type transformer body (2) in cooling down. The heat dissipation assembly includes several hollow heat-conducting rings (4) and several hollow first heat dissipation plates (5). Several heat-conducting rings (4) are all sleeved on the outside of the dry-type transformer body (2), and several first heat dissipation plates (5) are all installed on the outside of the protective shell (1) and located at the air outlet. The protective shell (1) is also connected to a circulation pipeline that spans the inside and outside of the protective shell (1), and the two ends of the circulation pipeline are respectively connected to the inside of a number of first heat dissipation plates (5) and a number of heat conduction rings (4), so that the heat conduction fluid circulates in the first heat dissipation plates (5) and heat conduction rings (4) through the circulation pipeline, which is used to assist the dry-type transformer body (2) in conducting heat to the outside of the protective shell (1); The protective shell (1) is also provided with a first driving structure inside, which is used to guide the air inside the protective shell (1) to flow out through the gaps of several first heat dissipation plates (5) at the air outlet.

2. The novel dry-type grounding transformer coil structure according to claim 1, characterized in that: The dry-type transformer body (2) is provided with a coil assembly, and the coil assembly is integrally molded by epoxy resin casting.

3. The novel dry-type grounding transformer coil structure according to claim 2, characterized in that: The coil assembly includes an inner coil (17) and an outer coil (16) disposed outside the inner coil (17). An air passage (18) is also provided between the inner coil (17) and the outer coil (16), and the terminals of the inner coil (17) and the outer coil (16) are located on the same side.

4. The novel dry-type grounding transformer coil structure according to claim 2, characterized in that: The first heat sink (5) is provided with a third connecting pipe (13) at both the top and bottom. A retractable support column is provided on one side of the end of the third connecting pipe (13). One end of the support column is connected to the protective shell (1) to adjust the distance between the first heat sink (5) and the air outlet.

5. The novel dry-type grounding transformer coil structure according to claim 4, characterized in that: The heat-conducting ring (4) is C-shaped, and the inner side of the heat-conducting ring (4) is in contact with the outer side of the coil assembly; The circulation pipeline includes a first connecting pipe (11), and both ends of the heat-conducting ring (4) are provided with a first connecting pipe (11). The first connecting pipe (11) connects several heat-conducting rings (4) on the outside of a group of coil assemblies. The bottom of the two first connecting pipes (11) are respectively connected to the fourth connecting pipe (14) and the second connecting pipe (12), and one end of the second connecting pipe (12) and the fourth connecting pipe (14) penetrates the side wall of the protective shell (1). The end of the second connecting pipe (12) and the end of the fourth connecting pipe (14) located outside the protective shell (1) are respectively connected to one end of the upper third connecting pipe (13) and one end of the lower third connecting pipe (13); The second connecting pipe (12) is also provided with a second driving structure for driving fluid flow.

6. The novel dry-type grounding transformer coil structure according to claim 4, characterized in that: A second heat sink (6) is slidably connected inside each of the first heat sinks (5). The side of the second heat sink (6) away from the protective shell (1) passes through the first heat sink (5) to increase the heat dissipation area.

7. The novel dry-type grounding transformer coil structure according to claim 6, characterized in that: A fixing block (9) is provided on one side of each of the first heat sinks (5), and a control rod (7) is provided on each fixing block (9). The bottom of the control rod (7) is in contact with the second heat sink (6). The fixing block (9) is also provided with a locking structure for fixing the control rod (7).

8. The novel dry-type grounding transformer coil structure according to claim 6, characterized in that: A storage box (10) is provided on the top of the third connecting pipe (13) at the top, and a control valve is provided on the top of the storage box (10) for evacuating or filling the storage box (10). The storage box (10) is slidably connected to a control component for dividing the interior of the storage box (10) into upper and lower cavities; The lower cavity is connected to the upper third connecting pipe (13) so that the movement of several second heat sinks (6) can be controlled by the up and down movement of the drive control component.

9. The novel dry-type grounding transformer coil structure according to claim 8, characterized in that: The control assembly includes a first sealing plate (3) and a second sealing plate (15). The outer sides of the first sealing plate (3) and the second sealing plate (15) are slidably connected to the inner wall of the storage box (10), and the first sealing plate (3) and the second sealing plate (15) are connected by an elastic element to play a buffering role.

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