Autotransformer

Abstract

According to the autotransformer, the upper surface of a bottom plate is fixedly connected with a center column, the cylindrical surface of the center column is provided with a coil winding, the upper surface of the center column is fixedly connected with a heat conduction silica gel sheet, the upper surface of the heat conduction silica gel sheet is fixedly connected with a heat dissipation plate, and the upper surface of the bottom plate is fixedly connected with a side plate. The side surfaces of the side plates are fixedly connected with first protection frames, the first protection frames are fixedly connected with second protection frames away from the side plates, the lower surfaces of the first protection frames and the lower surfaces of the second protection frames make contact with the upper surface of the bottom plate, and the upper surfaces of the first protection frames and the upper surfaces of the second protection frames make contact with the lower surface of the heat dissipation plate. And the front side surface of the first protection frame is fixedly connected with an air extractor. According to the structure, through the arrangement of the bottom plate, the first protection frame, the second protection frame, the heat conduction silica gel sheet, the heat dissipation plate, the air extractor and the heat dissipation sponge block, the transformer can be effectively cooled while a winding of the autotransformer is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to an autotransformer. Background Art

[0002] An autotransformer is a transformer whose windings are the primary and secondary on the same winding, and the primary and secondary windings are directly connected in series, which is a self-coupled transformer. According to the structure, it can also be divided into adjustable voltage type and fixed type. The coupling of autotransformer means electromagnetic coupling. Ordinary transformers transfer energy through electromagnetic coupling of primary and secondary coils. There is no direct electrical connection between the primary and secondary sides. The primary and secondary sides of the autotransformer have direct electrical connection, and its low-voltage coil is part of the high-voltage coil. Autotransformers and other protective equipment are also used in the protection equipment of communication lines.

[0003] The windings of the autotransformer are exposed and are easily damaged and contaminated with dust, thereby affecting voltage stability. At the same time, the transformer often experiences high temperatures, and the existing structure lacks a heat dissipation mechanism for effective heat dissipation. Utility Model Content

[0004] The utility model provides an autotransformer, which can effectively reduce the temperature of the transformer while protecting the winding of the autotransformer.

[0005] To achieve the above-mentioned purpose, an autotransformer is provided, wherein the upper surface of the base plate is fixedly connected to the center column, the cylindrical surface of the center column is provided with a coil winding, joints are provided at both ends of the coil winding, the upper surface of the center column is fixedly connected to a thermally conductive silicone sheet, the upper surface of the thermally conductive silicone sheet is fixedly connected to a heat sink, the upper surface of the base plate is fixedly connected to the side plate, the side surface of the side plate is fixedly connected to a first protective frame, the first protective frame is fixedly connected to a second protective frame away from the side plate, the lower surfaces of the first protective frame and the second protective frame are in contact with the upper surface of the base plate, the upper surfaces of the first protective frame and the second protective frame are in contact with the lower surface of the heat sink, the front surface of the first protective frame is fixedly connected to an exhaust fan, the front surface of the first protective frame is provided with a through groove, and a filter sponge block is fixedly connected to the groove of the first protective frame. The first protection frame and the second protection frame are provided to facilitate the protection of the coil windings. The thermal conductive silicone sheet is provided to facilitate the transfer of heat generated during the operation of the transformer to the heat sink while ensuring insulation. The heat sink is provided to facilitate the heat dissipation of the transformer. The vacuum pump is provided to facilitate the extraction of hot air in the space formed by the bottom plate, the first protection frame, the second protection frame and the heat sink, and the air pressure difference is used to allow the outside gas to enter the sealed space from the through groove of the first protection frame, thereby cooling the sealed space. The filter sponge block is provided to facilitate the filtering of dust in the colder outside air when the vacuum pump is working, so as to prevent the outside dust from accumulating on the coil windings.

[0006] According to the autotransformer, a through slot having the same shape as the joint is provided on the second protection frame, and the joint passes through the through slot of the second protection frame.

[0007] According to the autotransformer, the central column, coil windings, and thermally conductive silicone sheet are in a closed space formed by the bottom plate, the first protection frame, the second protection frame, and the heat dissipation plate.

[0008] According to the autotransformer, the upper surface of the bottom plate is fixedly connected to the support column, the upper surface of the support column is fixedly connected to the fan group, the heat sink is provided with a plurality of horizontally penetrating ventilation holes, and the air outlet of the fan group blows toward the ventilation holes on the heat sink. The fan group is provided to facilitate the speeding up of the heat loss on the heat sink, thereby improving the heat dissipation effect of the heat sink.

[0009] According to the autotransformer, the input end and the output end of the air extractor are respectively provided with ventilation pipes, and the ventilation pipe at the input end of the air extractor passes through the first protection frame.

[0010] According to the autotransformer, the upper surface of the bottom plate is provided with a positioning hole, the upper surface of the side plate is provided with a positioning hole, the cylindrical surface of the positioning hole of the side plate is slidably connected to a positioning shaft, and the positioning shaft passes into the bottom plate positioning hole. The positioning shaft is provided to facilitate determination of the position of the side plate on the bottom plate.

[0011] According to the autotransformer, the upper surface of the side plate is provided with a through circular hole, the upper surface of the bottom plate is provided with a threaded hole, and the through circular hole of the side plate is communicated with the thread of the bottom plate.

[0012] According to the autotransformer, the threaded hole of the bottom plate is threadedly connected to a fixing screw, the rod of the fixing screw passes through the through circular hole of the side plate, and the lower surface of the head of the fixing screw contacts the upper surface of the side plate. The fixing screw is provided to facilitate fixing the side plate to the bottom plate.

[0013] The beneficial effects of the utility model are as follows: by arranging the bottom plate, the first protection frame, the second protection frame, the thermally conductive silicone sheet, the heat dissipation plate, the air extractor and the heat dissipation sponge block, the winding of the autotransformer can be protected while the transformer can be effectively cooled.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the overall structure of an autotransformer of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of an autotransformer of the utility model from another perspective;

[0018] Figure 3 This is a cross-sectional structural diagram of the installation position of the coil winding of an autotransformer of the utility model;

[0019] Figure 4 This is an enlarged view of the local structure of point A of an autotransformer of the utility model.

[0020] Legend:

[0021] 1. Bottom plate; 2. First protection frame; 3. Second protection frame; 4. Filter sponge block; 5. Vacuum pump; 6. Heat sink; 7. Support column; 8. Fan assembly; 9. Connector; 10. Coil winding; 11. Center column; 12. Thermal conductive silicone sheet; 13. Side panel; 14. Positioning shaft; 15. Fixing screws. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] Reference Figures 1 to 4 The utility model embodiment is an autotransformer, which includes a bottom plate 1: the upper surface of the bottom plate 1 is fixedly connected to the center column 11, the cylindrical surface of the center column 11 is provided with a coil winding 10, and joints 9 are provided at both ends of the coil winding 10. The upper surface of the center column 11 is fixedly connected to the thermal conductive silicone sheet 12, and the upper surface of the thermal conductive silicone sheet 12 is fixedly connected to the heat dissipation plate 6. The upper surface of the bottom plate 1 is fixedly connected to the side plate 13, and the side surface of the side plate 13 is fixedly connected to the first protection frame 2. The first protection frame 2 is fixedly connected to the second protection frame 3 away from the side plate 13. The lower surfaces of the first protection frame 2 and the second protection frame 3 are in contact with the upper surface of the bottom plate 1. The upper surfaces of the protection frame 2 and the second protection frame 3 are in contact with the lower surface of the heat sink 6. The front surface of the first protection frame 2 is fixedly connected to the vacuum pump 5. The front surface of the first protection frame 2 is provided with a through groove. The filter sponge block 4 is fixedly connected to the groove of the first protection frame 2. The input and output ends of the vacuum pump 5 are respectively provided with ventilation pipes. The ventilation pipe at the input end of the vacuum pump 5 passes through the first protection frame 2. The ventilation pipe at the input end of the vacuum pump 5 will not contact the coil winding 10. The bottom plate 1, the first protection frame 2, and the second protection frame 3 are all made of insulating materials. The first protection frame 2 and the second protection frame 3 are connected by bolts and nuts.

[0024] A positioning hole is provided on the upper surface of the bottom plate 1 , and a positioning hole is provided on the upper surface of the side plate 13 . The cylindrical surface of the positioning hole of the side plate 13 is slidably connected to the positioning shaft 14 , and the positioning shaft 14 passes into the positioning hole of the bottom plate 1 .

[0025] A through circular hole is provided on the upper surface of the side plate 13, and a threaded hole is provided on the upper surface of the bottom plate 1. The through circular hole of the side plate 13 is connected to the thread of the bottom plate 1. The threaded hole of the bottom plate 1 is fixed with a threaded connection screw 15. The rod of the fixing screw 15 passes through the through circular hole of the side plate 13, and the lower surface of the head of the fixing screw 15 contacts the upper surface of the side plate 13.

[0026] The second protective frame 3 is provided with a through groove with the same shape as the joint 9. The joint 9 passes through the through groove of the second protective frame 3. The center column 11, the coil winding 10, and the thermal conductive silicone sheet 12 are in a closed space formed by the base plate 1, the first protective frame 2, the second protective frame 3 and the heat sink 6.

[0027] The upper surface of the base plate 1 is fixedly connected to the support column 7, and the upper surface of the support column 7 is fixedly connected to the fan group 8. The heat sink 6 is provided with a plurality of horizontally through ventilation holes. The air outlet of the fan group 8 blows toward the ventilation holes on the heat sink 6. The fan group 8 is composed of a plurality of small fans. When started, the plurality of small fans work simultaneously.

[0028] Working principle: With the first protective frame 2 and the second protective frame 3 blocking, the coil winding 10 will not be damaged by collision with other objects. When the vacuum fan 5 is started, the high-temperature gas in the space formed by the base plate 1, the first protective frame 2, the second protective frame 3, and the heat sink 6 will be extracted. The pressure in this space is therefore reduced, and the colder air from the outside will enter this space from the through groove of the first protective frame 2 due to the influence of the air pressure difference, thereby cooling the components in this space. At the same time, part of the heat will be transferred from the thermal conductive silicone sheet 12 to the heat sink 6, further enhancing the cooling effect.

[0029] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An autotransformer, characterized in that: The invention comprises a bottom plate (1): the upper surface of the bottom plate (1) is fixedly connected to a center column (11); a coil winding (10) is arranged on the cylindrical surface of the center column (11); joints (9) are arranged at both ends of the coil winding (10); the upper surface of the center column (11) is fixedly connected to a heat-conducting silicone sheet (12); the upper surface of the heat-conducting silicone sheet (12) is fixedly connected to a heat sink (6); the upper surface of the bottom plate (1) is fixedly connected to a side plate (13); the side surface of the side plate (13) is fixedly connected to a first protective frame (2); The first protection frame (2) is fixedly connected to the second protection frame (3) away from the side plate (13); the lower surfaces of the first protection frame (2) and the second protection frame (3) are in contact with the upper surface of the bottom plate (1); the upper surfaces of the first protection frame (2) and the second protection frame (3) are in contact with the lower surface of the heat sink (6); the front surface of the first protection frame (2) is fixedly connected to the exhaust fan (5); the front surface of the first protection frame (2) is provided with a through groove; the filter sponge block (4) is fixedly connected to the groove of the first protection frame (2).

2. The autotransformer according to claim 1, characterized in that: The second protective frame (3) is provided with a through slot having the same shape as the joint (9), and the joint (9) passes through the through slot of the second protective frame (3).

3. The autotransformer according to claim 1, characterized in that: The central column (11), the coil winding (10), and the heat-conducting silicone sheet (12) are in a closed space formed by the bottom plate (1), the first protection frame (2), the second protection frame (3), and the heat dissipation plate (6).

4. The autotransformer according to claim 1, characterized in that: The upper surface of the base plate (1) is fixedly connected to a support column (7), the upper surface of the support column (7) is fixedly connected to a fan group (8), a plurality of horizontally through ventilation holes are provided on the heat dissipation plate (6), and the air outlet of the fan group (8) blows toward the ventilation holes on the heat dissipation plate (6).

5. The autotransformer according to claim 1, characterized in that: The input end and the output end of the air extractor (5) are respectively provided with ventilation pipes, and the ventilation pipe at the input end of the air extractor (5) passes through the first protection frame (2).

6. The autotransformer according to claim 1, characterized in that: The upper surface of the bottom plate (1) is provided with a positioning hole, and the upper surface of the side plate (13) is provided with a positioning hole. The cylindrical surface of the positioning hole of the side plate (13) is slidably connected to a positioning shaft (14), and the positioning shaft (14) passes into the positioning hole of the bottom plate (1).

7. The autotransformer according to claim 1, characterized in that: The upper surface of the side plate (13) is provided with a through circular hole, and the upper surface of the bottom plate (1) is provided with a threaded hole, and the through circular hole of the side plate (13) is in communication with the thread of the bottom plate (1).

8. The autotransformer according to claim 7, characterized in that: The threaded hole of the bottom plate (1) is threadedly connected to a fixing screw (15), the rod of the fixing screw (15) passes through the through circular hole of the side plate (13), and the lower surface of the head of the fixing screw (15) contacts the upper surface of the side plate (13).

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