Winding structure and low-loss dry-type transformer

Abstract

The utility model relates to the technical field of dry-type transformers, in particular to a winding structure and a low-loss dry-type transformer, which comprises an iron core, a low-voltage coil, a high-voltage coil, a base, a protection component and a ventilation component, the low-voltage coil is sleeved outside the iron core, the high-voltage coil is sleeved outside the low-voltage coil, and the upper end face of the base is connected with the iron core; the protection assembly is connected to the base, and the ventilation assembly is connected to the protection assembly. According to the transformer, the protection assemblies are spliced to form the cylindrical containing cavity to wrap the iron core, the low-voltage coil and the high-voltage coil, the protection wall body is formed on the outer side of the winding so as to prevent the winding from being damaged due to external force impact, and the protection end of the protection wall body can move for buffering when the protection wall body is impacted by the external force; the moving end of the ventilation assembly pulls the multiple rotating ends of the protection assembly to rotate, an air inlet channel is formed between every two adjacent rotating ends, the air circulation speed is increased, the temperature is reduced, and then transformer losses are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-type transformers, in particular to a winding structure and a low-loss dry-type transformer. Background Technique

[0002] A dry-type transformer mainly consists of an iron core made of silicon steel sheets and coils cast with epoxy resin. An insulating cylinder is placed between the high-voltage and low-voltage coils to increase electrical insulation, and the coils are supported and restricted by cushion blocks. The fasteners for the lap joints of its components all have anti-loosening properties. It is commonly used in places with high requirements for performance such as fire prevention and explosion prevention.

[0003] After retrieval, Chinese Patent Publication No. CN217788173U discloses a transformer coil winding structure and a double-split dry-type transformer, including a vertically arranged iron core. It is characterized in that an outer edge surface of the iron core is coaxially sleeved with a low-voltage coil, an outer edge surface of the low-voltage coil is coaxially sleeved with an insulating soft sleeve, an outer edge surface of the insulating soft sleeve is coaxially sleeved with a high-voltage coil, an outer edge surface of the high-voltage coil is coaxially sleeved with a wear-resistant shock isolation layer, a circular groove is coaxially opened at a middle position of an outer edge surface of the wear-resistant shock isolation layer, an insulating protective shell is coaxially arranged outside the wear-resistant shock isolation layer, an insulating positioning sleeve inserted into the iron core is coaxially and fixedly connected to a lower bottom surface of the insulating protective shell, a plurality of groups of driving devices are evenly distributed around a side wall of the insulating protective shell, and each group of the driving devices drives a rod group moving radially along the wear-resistant shock isolation layer. An arc-shaped clip capable of being clamped with the groove is fixedly connected to one end of each group of the rod groups pointing to an axis of the wear-resistant shock isolation layer.

[0004] However, in the above technical solution, only an insulating protective shell is added outside the coil to protect the coil winding, and the arc-shaped clips are used to match windings of different sizes by the telescoping of screws and nuts. However, after the screws and nuts are adapted to the winding, when an external impact hits the protective shell, the impact force will be transmitted to the arc-shaped clips and the wear-resistant shock isolation layer through the conduction of the screws and nuts, and the external impact is likely to cause deformation and damage to the coil and the insulating layer. Summary of the Utility Model

[0005] The purpose of the utility model is to propose a winding structure and a low-loss dry-type transformer for the problems existing in the background technique.

[0006] The technical solution of the utility model: A winding structure includes an iron core, with a low-voltage coil sleeved outside it, and a high-voltage coil sleeved outside the low-voltage coil; a base, which is connected to the iron core; a protection component, which is connected to the base; in the use state of the protection component, the protection component is spliced to form a cylindrical accommodating cavity to wrap the winding structure therein; a ventilation component, which is connected to the protection component; in the use state of the ventilation component, a moving end of the ventilation component pulls a plurality of rotating ends of the protection component to rotate, and an air inlet channel is formed between adjacent rotating ends.

[0007] Preferably, a plurality of heat dissipation fins are connected to the outside of the high-voltage coil.

[0008] Preferably, the protection component includes a connecting seat sleeved on the outside of the support base, and the connecting seat is connected to the support base; a support rod connected in a plurality of sliding grooves formed in the connecting seat; a sliding block, the number of which corresponds to that of the support rod, and the sliding block is slidably connected to the support rod; a first elastic member, the number of which is twice that of the sliding block, the first elastic member is sleeved on the outside of the support rod at both ends of the sliding block, and the elastic member is arranged in parallel with the sliding block; a protection shell, the number of which corresponds to that of the sliding block, and the protection shell is connected to the sliding block.

[0009] Preferably, the protection shell includes a plurality of fixed frames, each fixed frame is provided with a rectangular opening; a plurality of support shafts, both ends of the support shaft are rotatably connected to the fixed frame; a protection plate, the number of which corresponds to that of the support shaft, and the protection plate is connected to the support shaft.

[0010] Preferably, a filter screen plate is connected to each support shaft, and the filter screen plate is perpendicular to the protection plate.

[0011] Preferably, the ventilation component includes a temperature controller connected to the fixed frame; a telescopic device connected to the fixed frame; a convex block, the number of which corresponds to that of the support shaft, and the convex block is connected to the support shaft; a wire, one end of which is connected to the telescopic end of the telescopic device, and the other end of the wire passes through the fixed frame and is sequentially connected to the convex block.

[0012] Preferably, a second elastic member is connected to the fixed frame.

[0013] A low-loss dry-type transformer includes a winding structure according to any one of the claims.

[0014] Compared with the prior art, the above technical solutions of the present invention have the following beneficial technical effects:

[0015] In the present invention, the protection components are spliced to form a cylindrical accommodating cavity to wrap the iron core, the low-voltage coil and the high-voltage coil therein, and a protection wall is formed outside the winding to prevent the winding from being damaged by external impact. When the protection wall is subjected to external impact, its protection end can also move for buffering. The moving end of the ventilation component pulls the plurality of rotating ends of the protection component to rotate, and an air inlet channel is formed between adjacent rotating ends, increasing the air circulation speed to reduce the temperature and thus reduce the transformer loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the present invention;

[0017] Figure 2 is Figure 1 a schematic cross-sectional view of

[0018] Figure 3 isFigure 2 Enlarged view of the structure at location A;

[0019] Figure 4 It is a schematic diagram of a partial structure of the protective housing.

[0020] Reference numerals: 1, iron core; 2, low-voltage coil; 3, high-voltage coil; 4, base; 5, heat dissipation fins; 6, connecting seat; 7, support rod; 8, sliding groove; 9, sliding block; 10, first elastic member; 11, protective housing; 12, fixing frame; 13, support shaft; 14, protective plate; 15, filter mesh plate; 16, temperature controller; 17, telescopic device; 18, convex block; 19, wire; 20, second elastic member. Detailed implementation manners

[0021] Embodiment 1

[0022] As Figures 1-4 shown, a winding structure proposed by the present utility model includes an iron core 1, a low-voltage coil 2, a high-voltage coil 3, a base 4, a protection component, and a ventilation component. The low-voltage coil 2 is sleeved outside the iron core 1, and the high-voltage coil 3 is sleeved outside the low-voltage coil 2. The upper end surface of the base 4 is connected to the iron core 1; the protection component is connected to the base 4; in the use state of the protection component, the protection components are spliced to form a cylindrical accommodation cavity to wrap the iron core 1, the low-voltage coil 2, and the high-voltage coil 3 therein, forming a protective wall on the outside of the winding to prevent the winding from being damaged by external impact. When the protective wall is subjected to external impact, its protective end can also move for buffering; the ventilation component is connected to the protection component; in the use state of the ventilation component, the moving end of the ventilation component pulls the multiple rotating ends of the protection component to rotate, and an air inlet channel is formed between adjacent rotating ends, increasing the air flow speed to reduce the temperature and thereby reducing the transformer loss.

[0023] In an optional embodiment, a plurality of heat dissipation fins 5 are connected to the outside of the high-voltage coil 3; the heat dissipation fins 5 increase the contact area between the high-voltage coil 3 and the air, thereby enhancing the heat dissipation ability.

[0024] Embodiment 2

[0025] As Figures 2-4As shown in the figure, a winding structure and a low-loss dry-type transformer proposed by the present utility model. Compared with the first embodiment, the detailed structure of the protection component is described in this embodiment. The protection component includes a connecting seat 6, a support rod 7, a sliding block 9, a first elastic member 10, and a protection housing 11. The connecting seat 6 is sleeved outside the support base 4, and the connecting seat 6 is connected to the support base 4; the support rod 7 is connected in a plurality of sliding grooves 8 opened on the connecting seat 6. The sliding grooves 8 are circumferentially distributed with the central axis of the connecting seat 6 as the center of the circle. The number of sliding blocks 9 corresponds to that of the support rods 7. The sliding block 9 is slidably connected to the support rod 7. The number of the first elastic members 10 is twice that of the sliding blocks 9. The first elastic members 10 are sleeved outside the support rods 7 at both ends of the sliding block 9. The first elastic member sleeves are arranged parallel to the sliding block 9; the first elastic member 10 is selected but not limited to a spring; the number of the protection housings 11 corresponds to that of the sliding blocks 9, and the protection housing 11 is connected to the sliding block 9.

[0026] In an optional embodiment, the protection housing 11 includes a fixed frame 12, a support shaft 13, and a protection plate 14. A plurality of fixed frames 12 are circumferentially distributed with the central axis of the base 4 as the center of the circle. The fixed frame 12 is provided with a rectangular opening. A plurality of support shafts 13 are equidistantly distributed in the horizontal direction of the fixed frame 12. Both ends of the support shaft 13 are rotatably connected to the fixed frame 12 by bearings. The support shaft 13 is the rotating end of the protection component. The number of the protection plates 14 corresponds to that of the support shafts 13, and the protection plate 14 is connected to the support shaft 13.

[0027] In an optional embodiment, a filter screen plate 15 is connected to each of the support shafts 13, and the filter screen plate 15 is perpendicular to the protection plate 14.

[0028] Embodiment Three

[0029] As Figure 4 shown in the figure, a winding structure and a low-loss dry-type transformer proposed by the present utility model. Compared with the second embodiment, the detailed structure of the ventilation component is described in this embodiment. The ventilation component includes a temperature controller 16, a telescopic device 17, a convex block 18, and a wire 19. The temperature controller 16 is connected to the fixed frame 12; the telescopic device 17 is connected to the upper end surface of the fixed frame 12. The telescopic device 17 is the moving end of the ventilation component. The telescopic end of the telescopic device 17 passes through a through hole opened at the top of the fixed frame 12; the number of the telescopic devices 17 corresponds to that of the fixed frames 12. The telescopic device 17 is selected but not limited to an electric air rod; the number of the convex blocks 18 corresponds to that of the support shafts 13, and the convex block 18 is connected to the support shaft 13; the convex block 18 has an angle of 45 degrees with the protection plate 14; one end of the wire 19 is connected to the telescopic end of the telescopic device 17, and the other end of the wire 19 passes through the fixed frame 12 and is sequentially connected to the convex block 18.

[0030] In an alternative embodiment, a second elastic member 20 is connected to the fixed frame 12; the second elastic member 20 is selected but not limited to an elastic plate, and the elastic plate pulls the bump 18 to reset when the ventilation assembly resets through its own elastic force;

[0031] In summary, when the present utility model is in use, a plurality of protective shells 11 are arranged outside the high-voltage coil 3 to form a cylindrical accommodation cavity, and the winding structure is protected through this accommodation cavity to prevent displacement and deformation of the winding structure caused by the collision of external objects; when the protective shell 11 is impacted by an external force, the sliding block 9 at the top of the protective shell 11 moves synchronously with the protective shell 11, and the sliding block 9 moves linearly along the central axis of the support rod 7 to compress one first elastic member 10 and stretch the other first elastic member 10, and the external force is consumed through the compression and stretching of the two; when the dry-type transformer is in normal use, the winding structure generates heat during operation, and the heat is dissipated through the heat dissipation fins 5 and the winding itself. The protective shell 11 outside it hinders the air circulation, resulting in a gradual increase in temperature. When the temperature rises to the set temperature value, the temperature controller 16 controls the telescopic device 17 to start. The telescopic end of the telescopic device 17 moves to stretch the wire 19, and the wire 19 is connected to pull the bumps 18 on a plurality of support shafts 13 to rotate, thereby driving the support shafts 13 to rotate. The protective plate 14 on the support shaft 13 changes from being parallel to the fixed frame 12 to being perpendicular to the fixed frame 12. At this time, the filter mesh plate 15 moves to the original position of the protective plate 14, and external air can enter the accommodation cavity formed by the protective shell 11 from here to dissipate heat from the winding. The filter mesh plate 15 filters the dust and impurities contained in the air to prevent the impurities from adhering to the surface of the winding structure and affecting its heat dissipation.

[0032] The embodiments of the present utility model have been described in detail above with reference to the drawings, but the present utility model is not limited thereto. Various changes can be made without departing from the spirit of the present utility model within the scope of knowledge possessed by those skilled in the art.

Claims

1. A winding structure, characterized in that, including a core (1) with a low-voltage coil (2) sleeved outside it, and a high-voltage coil (3) sleeved outside the low-voltage coil (2); a base (4) connected to the core (1); a protection component connected to the base (4); in the use state of the protection component, the protection component is spliced to form a cylindrical accommodating cavity to wrap the winding structure therein; a ventilation component connected to the protection component; in the use state of the ventilation component, the moving end of the ventilation component pulls the plurality of rotating ends of the protection component to rotate, and an air inlet channel is formed between adjacent rotating ends.

2. A winding structure according to claim 1, characterized in that, A plurality of heat dissipation fins (5) are connected to the outside of the high-voltage coil (3).

3. A winding structure according to claim 1, characterized in that, The protection component includes a connecting seat (6) sleeved outside the support base (4), and the connecting seat (6) is connected to the support base (4); support rods (7) connected in a plurality of sliding grooves (8) opened on the connecting seat (6); sliding blocks (9) corresponding to the support rods (7) in number, and the sliding blocks (9) are slidably connected to the support rods (7); first elastic members (10) with a quantity double that of the sliding blocks (9), the first elastic members (10) are sleeved outside the support rods (7) at both ends of the sliding blocks (9), and the elastic members are arranged parallel to the sliding blocks (9); protection shells (11) corresponding to the sliding blocks (9) in number, and the protection shells (11) are connected to the sliding blocks (9).

4. A winding structure according to claim 3, characterized in that, The protection shell (11) includes a plurality of fixed frames (12) which are distributed, and the fixed frames (12) are provided with rectangular openings; a plurality of support shafts (13) which are distributed, and both ends of the support shafts (13) are rotatably connected to the fixed frames (12); protection plates (14) corresponding to the support shafts (13) in number, and the protection plates (14) are connected to the support shafts (13).

5. A winding structure according to claim 4, characterized in that Filter net plates (15) are connected to the support shafts (13), and the filter net plates (15) are perpendicular to the protection plates (14).

6. A winding structure according to claim 4, characterized in that, The ventilation component includes a temperature controller (16) connected to the fixed frame (12); a telescopic device (17) connected to the fixed frame (12); protrusions (18) corresponding to the support shafts (13) in number, and the protrusions (18) are connected to the support shafts (13); a wire (19) with one end connected to the telescopic end of the telescopic device (17), and the other end of the wire (19) passes through the fixed frame (12) and is sequentially connected to the protrusions (18).

7. A winding structure according to claim 6, characterized in that, A second elastic member (20) is connected to the fixed frame (12).

8. A low-loss dry-type transformer, characterized in that, The winding structure according to any one of claims 1-7.

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