Low-voltage foil winding copper bar for dry-type transformer with less material

Abstract

The application relates to the technical field of dry-type transformer accessories, in particular to a low-voltage foil winding copper bar with less material for a dry-type transformer, which comprises a first horizontal part, a raised part and a second horizontal part, the first horizontal part and the second horizontal part are spaced apart by a predetermined distance in the height direction and are connected through the raised part, the raised part is arranged in an inclined manner, the first horizontal part is welded with copper foil, one end of the first horizontal part, which is away from the raised part, is provided with an inclined slot, and the width dimension of the one end of the first horizontal part, which is away from the raised part, gradually increases to the other end, the inclined slot is arranged, the copper bar consumption is more accurate in the case that the copper bar consumption meets the carrying current of each region in the length direction of the first horizontal part, and the advantage that the copper consumption is less is realized.

Description

Technical Field

[0001] This application relates to the technical field of dry-type transformer accessories, and more specifically to a low-voltage foil-wound copper busbar for dry-type transformers that uses less material. Background Technology

[0002] Dry-type transformers are transformers whose core and windings are not immersed in insulating oil, and are widely used in local lighting and other applications. Conventional dry-type transformers generally have a dual-winding structure, consisting of an external high-voltage winding and a low-voltage winding. Since the low-voltage winding usually carries a larger current, it is advisable to use copper foil as the conductor. Each low-voltage winding consists of copper foil, copper busbars at the beginning and end, and insulating materials.

[0003] Existing low-voltage foil winding copper busbars, such as Figure 1 As shown, the system includes a copper busbar body, which comprises a first horizontal portion 90, a raised portion, and a second horizontal portion. The first horizontal portion 90 and the second horizontal portion are spaced a predetermined distance apart in the height direction and connected by the raised portion. The raised portion is arranged at an angle. The first horizontal portion 90 is welded to a copper foil 91. The width of the first horizontal portion 90 is always equal from one end to the other. It should be noted that for the aforementioned low-voltage foil-wound copper busbar, when welding the copper foil 91 to the first horizontal portion 90, if... Figure 2 As shown, the copper foil 91 is welded to the middle section of the first horizontal portion 90, and the change in the current carrying capacity of the low-voltage foil winding copper busbar is a gradual, cumulative process, as shown in the reference. Figure 3 As shown, the current change from one end of the first horizontal section 90 to the other gradually increases to a predetermined value. Therefore, in existing low-voltage foil-wound copper busbars, maintaining the same width from one end to the other is wasteful in terms of material usage, leaving room for optimization. Furthermore, patent document (CN205318991U) discloses a low-voltage lead-out copper busbar with rectangular slots to reduce copper material usage.

[0004] Therefore, there is a need for a low-voltage foil-wound copper busbar for dry-type transformers that uses less copper. Summary of the Invention

[0005] The main objective of this application is to provide a low-voltage foil-wound copper busbar for dry-type transformers that uses less material. The copper busbar includes a copper busbar body, which comprises a first horizontal section, a raised section, and a second horizontal section. The first horizontal section and the second horizontal section are spaced a predetermined distance apart in the height direction and connected by the raised section. The raised section is arranged at an angle. The first horizontal section is welded to copper foil. The end of the first horizontal section opposite to the raised section has a slanted groove, and the width of the first horizontal section gradually increases from the end opposite to the raised section to the other end. By setting the slanted groove, the amount of copper used is more precisely reduced while still meeting the current carrying capacity requirements of each region along the length direction of the first horizontal section. Compared with the prior art, this method has the advantage of using less copper.

[0006] Another objective of this application is to provide a low-voltage foil-wound copper busbar for dry-type transformers that uses less material. The low-voltage foil-wound copper busbar for dry-type transformers that uses less material further includes two air channel support bars. Both air channel support bars are disposed in the oblique groove and are wound by the copper foil. By setting the air channel support bars, the copper foil is supported, ensuring that the shape of the copper foil is regular.

[0007] To achieve at least one of the above-mentioned objectives, this application provides a low-voltage foil-wound copper busbar for dry-type transformers that uses less material, wherein the low-voltage foil-wound copper busbar for dry-type transformers that uses less material comprises:

[0008] The copper busbar body includes a first horizontal section, a raised section, and a second horizontal section. The first horizontal section and the second horizontal section are spaced apart by a predetermined distance in the height direction and are connected by the raised section. The raised section is arranged at an angle. The first horizontal section is welded to copper foil. The end of the first horizontal section away from the raised section has an oblique groove, and the width of the first horizontal section away from the raised section gradually increases from the other end.

[0009] In one or more embodiments of this application, the side of the first horizontal portion away from the oblique groove is welded to one end of the copper foil.

[0010] In one or more embodiments of this application, the low-voltage foil-wound copper busbar for dry-type transformers using less material further includes two air duct support bars, both of which are disposed in the oblique groove and wound by the copper foil.

[0011] In one or more embodiments of this application, one of the airway support bars is located in the middle section of the width direction of the first horizontal portion, and the other airway support bar is located on the side having the oblique groove in the width direction of the first horizontal portion.

[0012] In one or more embodiments of this application, the first horizontal portion has a beveled surface and a flat surface on one side of the oblique groove, and one side of the airway support strip is flush with the intersection of the beveled surface and the flat surface.

[0013] In one or more embodiments of this application, the first horizontal portion has two grooves, the two grooves being located at the middle section of the first horizontal portion and at the intersection of the inclined portion and the planar portion, respectively.

[0014] In one or more embodiments of this application, the planar portion has a semi-circular groove, the inclined portion has a notch groove, one end of one of the airway support strips has a first inclined surface and an extending protrusion on the first inclined surface, and one end of another of the airway support strips has a semi-circular protrusion, the first inclined surface fits into the inclined portion, and the extending protrusion extends into the notch groove, and the semi-circular protrusion extends into the semi-circular groove.

[0015] In this embodiment, the low-voltage foil-wound copper busbar for dry-type transformers using less material includes a copper busbar body, which includes a first horizontal section, a raised section, and a second horizontal section. The first horizontal section and the second horizontal section are spaced apart by a predetermined distance in the height direction and connected by the raised section. The raised section is arranged at an angle. The first horizontal section is welded to copper foil. The end of the first horizontal section away from the raised section has a slanted groove, and the width of the first horizontal section away from the raised section gradually increases from the other end. By setting the slanted groove, the amount of copper busbar used can be reduced more precisely while meeting the current carrying capacity of each region in the length direction of the first horizontal section. Compared with the prior art, it has the advantage of using less copper material. Attached Figure Description

[0016] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 The diagram illustrates the structure of an existing low-voltage foil winding copper busbar at a certain angle.

[0018] Figure 2 The diagram illustrates the process of winding copper foil using existing low-voltage foil winding copper busbars.

[0019] Figure 3 The diagram illustrates the current-carrying variation of the copper busbar in an existing low-voltage foil winding.

[0020] Figure 4 The figure shows a schematic diagram of the structure of a low-voltage foil-wound copper busbar for a dry-type transformer using less material, as described in this application, at a certain angle.

[0021] Figure 5The illustration shows a structural schematic diagram of a low-voltage foil-wound copper busbar for a dry-type transformer that uses less material, taken from another angle.

[0022] Figure 6 The illustration shows a schematic diagram of the copper foil winding process for the low-voltage foil winding copper busbar of the dry-type transformer, which uses less material according to this application.

[0023] Figure 7 The figure shows a schematic diagram of the connection between the lower airway support strip and the first horizontal part in the first embodiment;

[0024] Figure 8 The figure shows a schematic diagram of the connection between the lower airway support strip and the first horizontal part in the second embodiment;

[0025] Figure 9 The diagram shows Figure 8 A magnified view of a portion of point C. Detailed Implementation

[0026] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0027] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0028] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0030] This illustration shows a low-voltage foil-wound copper busbar for a dry-type transformer, using less material. (Reference) Figures 4 to 9 According to any preferred embodiment of the present invention, a low-voltage foil-wound copper busbar for a dry-type transformer using less material includes a copper busbar body 10. The copper busbar body 10 includes a first horizontal portion 101, a raised portion 102, and a second horizontal portion 103. The first horizontal portion 101 and the second horizontal portion 103 are spaced apart by a predetermined distance in the height direction and are connected by the raised portion 102. The raised portion 102 is arranged at an inclination. The first horizontal portion 101 is welded to a copper foil 20. The end of the first horizontal portion 101 away from the raised portion 102 has an oblique groove 1011, and the width of the first horizontal portion 101 away from the raised portion 102 gradually increases from the other end.

[0031] Specifically, in any embodiment of this application, since the first horizontal portion 101 has the oblique groove 1011, the side of the first horizontal portion 101 with the oblique groove 1011 has an oblique surface 1012 and a flat surface 1013, and the angle between the oblique surface 1012 and the side of the first horizontal portion 101 is 6 to 8°.

[0032] It should be noted that by providing the oblique groove 1011 in the first horizontal portion 101, the amount of copper busbars on the first horizontal portion 101 is fully matched with the current carrying capacity of each region along the length of the first horizontal portion 101, thereby avoiding the waste of copper material caused by the equal width of the first horizontal portion 101 in the prior art. Compared with the prior art, this has the advantage of using less material. In addition, compared with the rectangular groove opened on the first horizontal portion 101 in the patent document (CN205318991U), this application provides the oblique groove 1011 and makes the oblique portion 1012 and one side of the first horizontal portion 101... With an included angle of 6 to 8 degrees, the amount of copper busbar used is more precisely reduced while still meeting the current carrying capacity requirements of each region along the length of the first horizontal section 101. Furthermore, since the current carrying capacity of each region along the length of the first horizontal section 101 is inclined upward, if a rectangular slot is opened, in order to meet the current carrying capacity requirements of the first horizontal section 101 at one end of the rectangular slot, the current carrying capacity of the first horizontal section 101 at the other end will inevitably be much lower than the limit that the amount of copper busbar can withstand. Therefore, compared with the prior art that starts with a rectangular slot, this application also has a substantial improvement in reducing the amount of copper used, that is, saving copper usage by eliminating the slot without being "vague".

[0033] Furthermore, in any embodiment of this application, the side of the first horizontal portion 101 opposite to the oblique groove 1011 is welded to one end of the copper foil 20.

[0034] In addition, in any embodiment of this application, the low-voltage foil winding copper busbar for dry-type transformers with less material usage also includes two air channel support bars 30, both of which are disposed in the oblique groove 1011 and are wound by the copper foil 20.

[0035] It should be noted that by providing the air passage support strip 30 in the oblique groove 1011, the copper foil 20 is prevented from deforming due to lack of support when it is wound around the first horizontal part 101 because the width of one end of the first horizontal part 101 is too small.

[0036] Specifically, in any embodiment of this application, one of the airway support bars 30 is located in the middle section of the width direction of the first horizontal portion 101, and the other airway support bar 30 is located on the side of the first horizontal portion 101 having the oblique groove 1011 in the width direction of the first horizontal portion 101.

[0037] It should be noted that during the winding process, the first horizontal part 101 is first welded to one end of the copper foil 20, and the two air channel support strips 30 are inserted into the corresponding positions. Then, the copper foil 20 and the layered insulating material, such as insulating paper, are wound around the first horizontal part 101.

[0038] Additionally, it should be noted that one side of the airway support strip 30 is flush with the intersection of the inclined portion 1012 and the flat portion 1013.

[0039] Furthermore, in order to facilitate more accurate placement of the airway support strip 30 in the corresponding position, in the first embodiment of this application, the first horizontal portion 101 has two grooves 1014, and the two grooves 1014 are respectively located in the middle section of the first horizontal portion 101 and at the intersection of the inclined portion 1012 and the flat portion 1013.

[0040] It should be noted that after the first horizontal part 101 is placed on the winding table, the position of the air channel support strip 30 relative to the first horizontal part 101 is determined by aligning one side of the air channel support strip 30 with one side of the groove 1014, so as to ensure that the overall shape of the wound copper foil 20 is regular.

[0041] Figure 8 and Figure 9The illustration shows a second embodiment of this application. In the second embodiment, the planar portion 1013 has a semi-circular groove 10131, the inclined portion 1012 has a notch groove 10121, one end of one airway support strip 30 has a first inclined surface and an extending protrusion 301 on the first inclined surface, and one end of the other airway support strip 30 has a semi-circular protrusion 302. The first inclined surface fits into the inclined portion 1012, and the extending protrusion 301 extends into the notch groove 10121, and the semi-circular protrusion 302 extends into the semi-circular groove 10131.

[0042] It should be noted that by setting the semi-circular groove 10131, the notch groove 10121, and the corresponding semi-circular protrusion 302 and the extension protrusion 301, the position of the airway support strip 30 can be better determined and pre-fixed. Furthermore, since the outer contour shapes of one end of the two airway support strips 30 are not the same, it also avoids the situation where the operator confuses the airway support strips 30 before winding.

[0043] In summary, the low-voltage foil-wound copper busbar for dry-type transformers using less material, based on the embodiments of this application, is explained, which provides advantages such as less copper material usage for the low-voltage foil-wound copper busbar for dry-type transformers using less material.

[0044] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.

Claims

1. A low-voltage foil-wound copper busbar for a dry-type transformer that uses less material, characterized in that: The low-voltage foil winding copper busbar for the dry-type transformer, which uses less material, includes... The copper busbar body includes a first horizontal section, a raised section, and a second horizontal section. The first horizontal section and the second horizontal section are spaced apart by a predetermined distance in the height direction and are connected by the raised section. The raised section is arranged at an angle. The first horizontal section is welded to copper foil. The end of the first horizontal section away from the raised section has an oblique groove, and the width of the first horizontal section away from the raised section gradually increases from the other end.

2. The low-voltage foil-wound copper busbar for dry-type transformers using less material as described in claim 1, characterized in that: The side of the first horizontal portion away from the oblique groove is welded to one end of the copper foil.

3. The low-voltage foil-wound copper busbar for dry-type transformers using less material as described in claim 2, characterized in that: The low-voltage foil-wound copper busbar for the dry-type transformer, which uses less material, also includes two air duct support bars, both of which are located in the oblique groove and are wound by the copper foil.

4. The low-voltage foil-wound copper busbar for dry-type transformers using less material as described in claim 3, characterized in that: One of the airway support bars is located in the middle section of the width direction of the first horizontal portion, and the other airway support bar is located on the side with the oblique groove in the width direction of the first horizontal portion.

5. The low-voltage foil-wound copper busbar for dry-type transformers using less material as described in claim 4, characterized in that: The first horizontal portion has a beveled surface and a flat surface on one side of the oblique groove, and one side of the airway support strip is flush with the intersection of the beveled surface and the flat surface.

6. The low-voltage foil-wound copper busbar for dry-type transformers using less material as described in claim 5, characterized in that: The first horizontal portion has two grooves, which are located in the middle section of the first horizontal portion and at the intersection of the inclined portion and the flat portion, respectively.

7. The low-voltage foil-wound copper busbar for dry-type transformers using less material as described in claim 5, characterized in that: The flat portion has a semi-circular groove, the inclined portion has a notch groove, one end of one of the airway support strips has a first inclined surface and an extending protrusion on the first inclined surface, and one end of the other airway support strip has a semi-circular protrusion. The first inclined surface fits into the inclined portion, and the extending protrusion extends into the notch groove, and the semi-circular protrusion extends into the semi-circular groove.

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