CN216528374U - Insulation structure and dual-voltage transformer - Google Patents

Abstract

The utility model relates to an insulating structure comprising: the insulating cylinder is used for accommodating the secondary coil; the supporting piece is arranged outside the insulating cylinder in a surrounding mode along the circumferential direction of the insulating cylinder; in the axial direction of the insulating cylinder, two mounting parts are arranged at intervals on one side of the supporting piece, which is back to the insulating cylinder; first insulating part, every the installation department is in insulating cylinder is ascending relative both ends all are equipped with first insulating part corresponds locates one the installation department both ends form between the first insulating part and are used for around establishing a primary coil around establishing the portion. The insulating structure can reduce the using amount of structural materials and the volume and weight of the double-voltage transformer, is beneficial to reducing the manufacturing cost of the double-voltage transformer, enhances various electrical properties of the double-voltage transformer, and meets the requirements of energy conservation, environmental protection and green manufacturing. The utility model also relates to a dual voltage transformer.

Description

Insulation structure and dual-voltage transformer

Technical Field

The utility model relates to the technical field of transformers, in particular to an insulation structure and a double-voltage transformer.

Background

A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and an iron core (magnetic core). In order to avoid the phenomena of discharge, breakdown and the like between the primary coil and the secondary coil, a certain safe insulation distance needs to be ensured between the primary coil and the secondary coil.

The safe insulation distance of the transformer depends on the operating voltage class of the transformer and the insulation structure of the transformer. For a dry-type transformer, the insulating medium between the conductors is air, except for the material of the insulating structure. When the insulation structure of the transformer is unreasonable, the safe insulation distance between the coil and the coil, the safe insulation distance between the coil and the iron core, the safe insulation distance between the iron core and other parts of the transformer and the like of the transformer need to be continuously increased along with the increase of the working voltage grade of the transformer, so that corresponding structural materials are increased, and waste is caused.

At present, in order to be suitable for two different rated voltages, the safe insulation distance between each part of a common dry-type dual-voltage transformer is set to be larger, so that the volume of the transformer is larger, and the cost cannot be reasonably saved.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide an insulation structure advantageous for reducing the manufacturing cost of a dual voltage transformer, and a dual voltage transformer provided with the same, in view of the problem that the conventional insulation structure cannot reasonably save the cost.

An insulating structure comprising:

the insulating cylinder is used for accommodating the secondary coil;

the supporting piece is arranged outside the insulating cylinder in a surrounding mode along the circumferential direction of the insulating cylinder; in the axial direction of the insulating cylinder, two mounting parts are arranged at intervals on one side of the supporting piece, which is back to the insulating cylinder;

first insulating part, every the installation department is in insulating cylinder is ascending relative both ends all are equipped with first insulating part corresponds locates one the installation department both ends form between the first insulating part and are used for around establishing a primary coil around establishing the portion.

In one embodiment, the insulation structure further comprises a second insulation piece, and the second insulation piece is embedded in both ends of one side, facing the insulation cylinder, of the support piece in the axial direction of the insulation cylinder;

the second projection of each second insulating part on the axial end face of the insulating cylinder is at least partially overlapped with the first projection of each winding part on the axial end face.

In one embodiment, the insulation structure further comprises a third insulation piece, and in the axial direction of the insulation cylinder, the third insulation piece is embedded in both ends of one side, back to the insulation cylinder, of the support piece;

the third projection of each third insulating part on the axial end face of the insulating cylinder is at least partially overlapped with the first projection of each winding part on the axial end face.

In one embodiment, the insulating structure further includes at least two fourth insulating members, at least a portion of each fourth insulating member is embedded in the supporting member, each fourth insulating member includes a first insulating portion and a second insulating portion, the first insulating portion and the second insulating portion are disposed at an included angle, each first insulating portion is disposed between two winding portions, and one second insulating portion is disposed between one winding portion and the insulating cylinder.

In one embodiment, the insulating structure further includes an insulating support plate, where the insulating support plate includes a first insulating support plate and a second insulating support plate, the first insulating support plate is disposed between the first insulating portion and the support member, and the second insulating support plate is disposed between the second insulating portion and the support member.

In one embodiment, each of the fourth insulating members includes a plurality of insulating plates independent from each other, each of the insulating plates includes a first insulating segment and a second insulating segment, the first insulating segment and the second insulating segment are disposed at an included angle, all the first insulating segments of each of the fourth insulating members collectively form the first insulating portion, and all the second insulating segments of each of the fourth insulating members collectively form the second insulating portion.

In one embodiment, the insulating structure includes a fifth insulating member, and the fifth insulating member is at least partially embedded in the supporting member and located between the two winding portions.

In one embodiment, the insulation tube includes a first sub-tube and a second sub-tube, the secondary coil is disposed in the second sub-tube, the first sub-tube is sleeved outside the second sub-tube, and the support member is disposed outside the first sub-tube in a circumferential direction of the first sub-tube.

In one embodiment, the insulating structure includes an insulating stay abutting between the first sub-barrel and the second sub-barrel.

A double-voltage transformer comprises a primary coil, a secondary coil and an insulation structure, wherein the secondary coil is arranged in an insulation cylinder, and the two primary coils are respectively wound on the two winding parts.

According to the insulating structure and the double-voltage transformer, the secondary coil is arranged in the insulating cylinder, the first insulating parts are arranged at the two ends of the two installation parts in the axial direction of the insulating cylinder, the winding parts are formed between the first insulating parts correspondingly arranged at the two ends of one installation part, and the two primary coils are respectively wound on the two winding parts. Thus, the insulating cylinder is arranged between the primary coil and the secondary coil, so that the insulating cylinder is positioned on a discharge path of the primary coil in the radial direction of the insulating cylinder, and the safe insulating distance between the primary coil and the secondary coil is conveniently shortened. Meanwhile, the first insulating parts at two ends of each primary coil can effectively intercept the discharge of the primary coil to another primary coil and other parts of the transformer along the axial direction of the insulating cylinder, and the safe insulating distance between the two primary coils is favorably shortened. Therefore, the insulating structure can reduce the amount of structural materials used and the size and weight of the dual voltage transformer, thereby reducing the manufacturing cost of the dual voltage transformer.

Drawings

Fig. 1 is a schematic structural diagram of an insulation structure according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a dual-voltage transformer according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the insulation structure shown in FIG. 1;

FIG. 4 is a schematic view of a fourth insulating member in the insulating structure shown in FIG. 1;

FIG. 5 is an enlarged schematic view of the structure at A in FIG. 3;

fig. 6 is a schematic structural diagram of an insulation structure according to another embodiment of the present invention;

fig. 7 is a schematic view of the structure of an insulating plate in the insulating structure shown in fig. 6.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, an embodiment of the present invention provides an insulation structure 10 disposed in a dual voltage transformer 20 for preventing discharge and breakdown between coils.

Referring to fig. 2, the dual voltage transformer 20 includes a primary winding 21, a secondary winding 22 and the insulation structure 10. The secondary coil 22 is provided in an insulating cylinder 100 (described below) of the insulating structure 10, and the two primary coils 21 are wound around two wound portions (described below) of the insulating structure 10, respectively. When two primary coils 21 are connected in series, the primary coils 21 can operate at a rated voltage. When the two primary coils 21 are connected in parallel, the primary coils 21 can operate under another rated voltage, so that the primary coils 21 of the dual-voltage transformer 20 can operate under two different rated voltages, the application range is wide, the dual-voltage transformer is convenient to use by users, and the manufacturing cost of the dual-voltage transformer with different rated voltages can be reduced.

Referring to fig. 2 and 3, the insulation structure 10 includes an insulation cylinder 100, a support member 200, and a first insulation member 300. The insulating cylinder 100 is used for accommodating the secondary coil 22 therein, and the supporting member 200 is circumferentially provided outside the insulating cylinder 100 along the circumferential direction of the insulating cylinder 100. In the axial direction of the insulation barrel 100, one side of the support member 200 facing away from the insulation barrel 100 is provided with two mounting parts at an interval, wherein the two mounting parts are a first mounting part 210 and a second mounting part 230 respectively. First insulating members 300 are disposed at opposite ends of each mounting portion in the axial direction of the insulating cylinder 100, and a winding portion for winding one primary coil 21 is formed between the first insulating members 300 correspondingly disposed at the two ends of one mounting portion.

In the insulation structure 10, the secondary coil 22 is installed in the insulation cylinder 100, the first insulating members 300 are respectively disposed at two ends of the first installation portion 210 and the second installation portion 230 in the axial direction of the insulation cylinder 100, a winding portion is formed between the first insulating members 300 correspondingly disposed at two ends of one installation portion, and the two primary coils are respectively wound on the two winding portions. As such, the insulation tube 100 is disposed between the primary coil 21 and the secondary coil 22 such that the insulation tube 100 is located on a discharge path of the primary coil 21 in a radial direction thereof, facilitating shortening of a safe insulation distance between the primary coil 21 and the secondary coil 22. Meanwhile, the first insulating members 300 at two ends of each primary coil 21 can effectively intercept the discharge of the primary coil 21 to another primary coil 21 and other parts of the transformer along the axial direction of the insulating cylinder 100, which is beneficial to shortening the safe insulating distance between the two primary coils 21. Accordingly, the insulation structure 10 can reduce the amount of structural materials used as well as the volume and weight of the dual voltage transformer 20, thereby reducing the manufacturing cost of the dual voltage transformer 20.

In one embodiment, the insulation tube 100 includes a first sub-tube 120 and a second sub-tube 140, the secondary coil 22 is disposed in the second sub-tube 140, the first sub-tube 120 is sleeved outside the second sub-tube 140, and the support 200 is disposed around the first sub-tube 120 along the circumference of the first sub-tube 120. The double-layer insulation cylinder 100 structure can further intercept the discharge of the primary coil 21 to the secondary coil 22 along the radial direction of the insulation cylinder 100, thereby improving the insulation performance of the dual-voltage transformer 20 and being beneficial to further shortening the safe insulation distance between the primary coil 21 and the secondary coil 22.

Specifically, both ends of the second sub-cylinder 140 in the axial direction respectively exceed both ends of the secondary coil 22 in the axial direction of the insulating cylinder 100, so as to ensure that the second sub-cylinder 140 can intercept the discharge of the primary coil 21 to the secondary coil 22 in the radial direction of the insulating cylinder 100.

Further, the insulation structure 10 further includes an insulation brace 150, and the insulation brace 150 abuts between the first sub-cylinder 120 and the second sub-cylinder 140 to enhance the structural stability and the insulation performance of the insulation cylinder 100. The two ends of the second sub-cylinder 140 in the axial direction exceed the upper and lower ends of the insulating stay 150 and the two ends of the first sub-cylinder 120 in the axial direction, and the two ends of the first sub-cylinder 120 in the axial direction also exceed the upper and lower ends of the insulating stay 150, so that the end surfaces of the first sub-cylinder 120, the second sub-cylinder 140 and the insulating stay 150 are not at the same height. Since creepage always runs along the shortest path on the surface, compared with the case that the insulating cylinder 100 and the insulating stay 150 are equal in height, the end surfaces of the first sub-cylinder 120, the second sub-cylinder 140 and the insulating stay 150 are not at the same height, which is beneficial to increasing creepage distance, and is beneficial to improving the insulating performance of the insulating structure 10. In addition, the length of the first sub-cylinder 120 and the length of the insulating stay 150 are both reduced, which is advantageous to save cost.

In one embodiment, the supporting member 200 includes a plurality of mutually independent comb-shaped supporting bars, all of which are circumferentially spaced around the insulating cylinder 100 along the circumference of the insulating cylinder 100. The support 200 formed by a plurality of independent comb-shaped support bars is more advantageous to save material compared to the one-piece cylindrical support 200. The first and second mounting parts 210 and 230 are disposed on the supporting member 200 at intervals along the axial direction of the insulating cylinder 100, and each of the first and second mounting parts 210 and 230 includes a plurality of slots disposed at intervals along the axial direction of the insulating cylinder 100 for winding the primary coil 21, so that the primary coil 21 is stably wound on the supporting member 200. The number of the first insulating members 300 is 4, so that one turn of the first insulating members 300 is placed on each of the upper and lower end surfaces of each primary coil 21 to secure the insulating performance. Alternatively, the first insulator 300 is made of an imide plate or a glass fiber plate or

Insulating paper and other insulating materials. It should be understood that in other embodiments, the support member 200 may be configured as a cylinder or include a plurality of membersThe structure of the arc-shaped stay is not limited herein.

Further, the insulation structure 10 includes a second insulation member 400, and both ends of one side of the support member 200 facing the insulation tube 100 in the axial direction of the insulation tube 100 are embedded with the second insulation member 400 such that the first and second mounting parts 210 and 230 are located between the second insulation members 400 opposite in the axial direction of the insulation tube 100. The second projection of each second insulating member 400 on the axial end face of the insulating cylinder 100 at least partially overlaps the first projection of each winding portion on the axial end face. As such, the second insulating member 400 can further intercept the discharge of the primary coil 21 in the axial direction of the insulating cylinder 100 to enhance the insulating performance of the insulating structure 10.

Specifically, the number of the second insulating members 400 is specifically 2. In order to ensure the insulation effect, two second insulation members 400 are respectively located outside two ends of the first sub-cylinder 120 in the axial direction, and the inner diameters of the two second insulation members 400 are smaller than the outer diameter of the first sub-cylinder 120, so that the projections of the primary coil 21 and the first sub-cylinder 120 on the axial end faces of the insulation cylinder 100 are at least partially located inside the projection of each second insulation member 400. Optionally, the second insulator 400 is made of an imide plate or a fiberglass plate or

Insulating paper and other insulating materials.

In an embodiment, the insulation structure 10 further includes a third insulation member 500, and the third insulation member 500 is embedded in both ends of one side of the support member 200 facing away from the insulation cylinder 100 in the axial direction of the insulation cylinder 100, so that the first mounting portion 210 and the second mounting portion 230 are located between the third insulation members 500 opposite to each other in the axial direction of the insulation cylinder 100. The third projection of each third insulating member 500 on the axial end face of the insulating cylinder 100 at least partially overlaps the first projection of each winding portion on the axial end face. As such, the third insulating member 500 can further intercept the discharge of the primary coil 21 in the axial direction of the insulating cylinder 100 to enhance the insulating performance of the insulating structure 10.

Specifically, the number of the third insulating members 500 is 4, and the first insulating member 300 and the second insulating member 400 are disposed between the first insulating member 300 and the second insulating member 400 at the upper end of the support member 200 and at the lower end of the support member 200Two third insulating members 500 are disposed between the members 400. In this way, the discharge of the primary coil 21 in the axial direction of the insulating cylinder 100 is intercepted by at least four layers of insulating members, so that the insulating performance of the insulating structure 10 is higher, the size of the insulating structure 10 is further reduced, and the manufacturing cost is saved. Optionally, the third insulation 500 is made of an imine board or a glass fiber board or

Insulating paper and other insulating materials. It should be understood that in other embodiments, the number of the third insulating members 500 is at least 2, which is not limited herein.

Further, the insulation structure 10 includes at least two fourth insulation members 600, at least a portion of the fourth insulation members 600 is embedded in the support member 200, and the fourth insulation members 600 include a first insulation portion 610 and a second insulation portion 620, and the first insulation portion 610 and the second insulation portion 620 are disposed at an included angle. Each first insulating portion 610 is disposed between two winding portions, and one second insulating portion 620 is disposed between one winding portion and the insulating cylinder 100, such that the first insulating portion 610 is disposed between two primary coils 21, and the second insulating portion 620 is disposed between each primary coil 21 and the insulating cylinder 100. In this way, the insulating performance between the two primary coils 21 and between the primary coil 21 and the secondary coil 22 is further improved, which is advantageous for reducing the volume and weight of the insulating structure 10.

Referring to fig. 4, in an embodiment, the insulation structure 10 includes two fourth insulation members 600, and the fourth insulation members 600 are specifically insulation angle rings. The included angle between the first insulating portion 610 and the second insulating portion 620 is a right angle, so that two first insulating portions 610 are provided between the two primary coils 21 to ensure the insulating property between the two primary coils 21. A second insulating portion 620 is provided between each of the primary coils 21 and the insulating cylinder 100 to further improve the insulating performance between the primary coils 21 and the secondary coils 22.

Referring to fig. 5, the insulation structure 10 further includes an insulation support plate, the insulation support plate includes a first insulation support plate 710 and a second insulation support plate 720, the first insulation support plate 710 is abutted to the first insulation portion 610 and the supportBetween the members 200, the second insulating supporting plate 720 is abutted between the second insulating portion 620 and the supporting member 200 to enhance the structural strength of the first insulating portion 610 and the second insulating portion 620, respectively, thereby improving the stability of the insulating structure 10. In addition, it is also advantageous to improve the insulating performance of the insulating structure 10. Alternatively, the first and second insulating support plates 710 and 720 may be made of an imine plate or a glass fiber plate or

Insulating paper and other insulating materials.

Referring to fig. 6 and 7, in another embodiment, each of the two fourth insulating members 600 includes a plurality of insulating plates 630 independent from each other, and all the insulating plates 630 of each fourth insulating member 600 are circumferentially embedded in the supporting member 200 along the circumferential direction of the insulating cylinder 100. Each insulating plate 630 includes a first insulating segment 631 and a second insulating segment 632, with first insulating segment 631 and second insulating segment 632 being disposed at an included angle. All of the first insulating segments 631 of each of the fourth insulating members 600 collectively form the first insulating portion 610, and all of the second insulating segments 632 of each of the fourth insulating members 600 collectively form the second insulating portion 620. As such, the first insulating portion 610 is provided between the two primary coils 21 to ensure the insulating property between the two primary coils 21. A second insulating portion 620 is provided between each primary coil 21 and the insulating cylinder 100 to further improve the insulating performance between the primary coil 21 and the secondary coil 22. The angle between first insulating section 631 and second insulating section 632 is specifically a right angle such that each insulating plate 630 has an L-shape.

Further, the insulating structure 10 includes a fifth insulating member 900, and the fifth insulating member 900 is at least partially embedded in the supporting member 200 and located between the upper and lower first insulating portions 610, so as to further enhance the insulating performance between the two primary coils 21, thereby facilitating to reduce the volume and weight of the insulating structure 10 and saving the cost.

Alternatively, the fourth insulating member 600 may be made of silicone rubber or

Insulating paper and other insulating materials.

In the insulation structure 10, the secondary coil 22 is installed in the insulation cylinder 100, the first insulation members 300 are respectively disposed at two ends of the first installation part 210 and the second installation part 230 in the axial direction of the insulation cylinder 100, a winding part is formed between the first insulation members 300 correspondingly disposed at two ends of one installation part, the two primary coils are respectively wound on the two winding parts, and the fourth insulation member 600 is disposed between the two primary coils 21. In this way, the insulation barrel 100 and the second insulation part 620 are disposed between the primary coil 21 and the secondary coil 22 to effectively enhance the insulation performance between the primary coil 21 and the secondary coil 22, so as to shorten the safe insulation distance between the primary coil 21 and the secondary coil 22. Meanwhile, the first insulating member 300 and the first insulating portion 610 can effectively intercept the discharge of the primary coil 21 to the other primary coil 21 and other parts of the transformer along the axial direction of the insulating cylinder 100, which is beneficial to shortening the safe insulating distance between the two primary coils 21. Therefore, the insulation structure 10 can reduce the usage amount of structural materials and the volume and weight of the dual voltage transformer 20, is beneficial to reducing the manufacturing cost of the dual voltage transformer 20, enhances various electrical properties of the dual voltage transformer 20, and meets the requirements of energy conservation, environmental protection and green manufacturing.

Based on the insulation structure 10, the present invention further provides a dual voltage transformer 20, wherein the dual voltage transformer 20 includes a primary coil 21, a secondary coil 22 and the insulation structure 10. The secondary coil 22 is disposed in the insulating cylinder 100 of the insulating structure 10, and the two primary coils 21 are respectively disposed on two winding portions of the insulating structure 10. When two primary coils 21 are connected in series, the primary coils 21 can operate at a rated voltage. When the two primary coils 21 are connected in parallel, the primary coils 21 can operate under another rated voltage, so that the primary coils 21 of the dual-voltage transformer 20 can operate under two different rated voltages, the application range is wide, the dual-voltage transformer is convenient to use by users, and the manufacturing cost of the dual-voltage transformer with different rated voltages can be reduced. The specific application and connection of the insulating structure 10 are described in the above embodiments, and therefore, the description thereof is omitted.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An insulating structure, comprising:

the insulating cylinder is used for accommodating the secondary coil;

the supporting piece is arranged outside the insulating cylinder in a surrounding mode along the circumferential direction of the insulating cylinder; in the axial direction of the insulating cylinder, two mounting parts are arranged at intervals on one side of the supporting piece, which is back to the insulating cylinder;

first insulating part, every the installation department is in insulating cylinder is ascending relative both ends all are equipped with first insulating part corresponds locates one the installation department both ends form between the first insulating part and are used for around establishing a primary coil around establishing the portion.

2. The insulation structure according to claim 1, further comprising a second insulation member embedded with both ends of a side of the support member facing the insulation tube in an axial direction of the insulation tube;

the second projection of each second insulating part on the axial end face of the insulating cylinder is at least partially overlapped with the first projection of each winding part on the axial end face.

3. The insulation structure according to claim 1, further comprising a third insulation member, wherein the third insulation member is embedded in both ends of one side of the support member facing away from the insulation cylinder in the axial direction of the insulation cylinder;

the third projection of each third insulating member on the axial end face of the insulating cylinder is at least partially overlapped with the first projection of each winding part on the axial end face.

4. The insulation structure of claim 1, further comprising at least two fourth insulation members, at least portions of the fourth insulation members being embedded in the support member, each fourth insulation member comprising a first insulation portion and a second insulation portion, the first insulation portion and the second insulation portion being disposed at an included angle, each first insulation portion being disposed between two of the winding portions, and one of the second insulation portions being disposed between one of the winding portions and the insulation cylinder.

5. The insulation structure of claim 4, further comprising an insulation support plate, wherein the insulation support plate comprises a first insulation support plate and a second insulation support plate, the first insulation support plate abuts between the first insulation portion and the support member, and the second insulation support plate abuts between the second insulation portion and the support member.

6. The insulation structure of claim 4, wherein each of said fourth insulation members comprises a plurality of independent insulation plates, each of said insulation plates comprising a first insulation segment and a second insulation segment, said first insulation segment and said second insulation segment being angularly disposed, all of said first insulation segments of each of said fourth insulation members collectively forming said first insulation portion, and all of said second insulation segments of each of said fourth insulation members collectively forming said second insulation portion.

7. The insulation structure according to claim 1, wherein the insulation structure comprises a fifth insulation member at least partially embedded in the support member and located between the two windings.

8. The insulation structure according to any one of claims 1 to 7, wherein the insulation cylinder comprises a first sub-cylinder and a second sub-cylinder, the secondary coil is arranged in the second sub-cylinder, the first sub-cylinder is sleeved outside the second sub-cylinder, and the supporting member is arranged outside the first sub-cylinder in a surrounding manner along the circumferential direction of the first sub-cylinder.

9. The insulation structure of claim 8, wherein the insulation structure comprises an insulation stay abutting between the first sub-barrel and the second sub-barrel.

10. A dual voltage transformer, comprising a primary coil, a secondary coil and the insulating structure of any one of claims 1 to 9, wherein the secondary coil is disposed in the insulating cylinder, and the two primary coils are respectively wound on the two wound portions.

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