A lead row structure with leads coming out from both sides of a low-voltage bushing and a transformer

Abstract

The present invention discloses a lead row structure with both sides of a low-voltage bushing and a transformer, belonging to the technical field of transformers. It includes two sets of lead row components. The lead row component includes a connecting row and multiple sets of transition components. The transition component includes a first transition row, which is in the horizontal direction and has at least one bend. One end of the first transition row is connected to the coil head, and the other end is vertically connected to one end of a second transition row. The other end of the second transition row is connected to the low-voltage bushing. The connecting row is respectively connected to the first transition row and the coil tail head. The lead row component is arranged below the transformer. In the present invention, the original upper lead row is changed to a lower lead row. The first transition row has a bend and is vertically connected to the second transition row, which not only effectively shortens the lead path, reduces the usage of the lead row, but also can reduce the temperature rise of the transformer, improve the service life of the transformer, and save the manufacturing cost of the transformer.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and particularly relates to a lead bar structure with two-side outlets of low-voltage bushings and a transformer. Background Art

[0002] The low-voltage side leads of a split transformer are connected in a yy connection method, where the leading ends of the three-phase coils are respectively connected to the low-voltage bushings, and the trailing ends of the three-phase coils are connected together. The position of the low-voltage bushings depends on the customer's requirements, and generally there are single-side outlets and two-side outlets. When there are two-side outlets of the low-voltage bushings, the traditional structure is that the lead bars come out from the upper side. The leading ends of the coils are connected to the low-voltage bushings through extended paths of transition bars to achieve electrical conduction.

[0003] In the traditional structure, as Figures 6-8 shown, the oil at the bottom layer of the transformer flows through the radiator to the top layer, and then the top-layer oil returns to the bottom layer to form a cycle. The radiator convects with the natural environment to reduce the oil temperature. At this time, most of the heat of the oil accumulates at the top layer of the transformer. The lead bars are all arranged at the top layer of the transformer, and the amount of lead bars used is large. When current flows through the lead bars, the heat generated is superimposed on the heat of the oil, causing the temperature of the top layer of the transformer to rise and damaging the transformer, shortening the service life of the transformer. And in the traditional structure, the amount of lead bars used is relatively large, resulting in a relatively high manufacturing cost of the transformer. Summary of the Invention

[0004] The purpose of the present invention is to provide a lead bar structure with two-side outlets of low-voltage bushings and a transformer, aiming to solve the problems that the service life of the transformer is shortened due to the high temperature of the top layer of the transformer, and the manufacturing cost of the transformer is relatively high due to the large amount of lead bars used.

[0005] To achieve the above purposes, the present invention is realized through the following technical solutions:

[0006] A lead bar structure with two-side outlets of low-voltage bushings includes two groups of lead bar assemblies, and each lead bar assembly includes a connecting bar and multiple groups of transition assemblies;

[0007] Each transition assembly includes a first transition bar. The first transition bar is in a horizontal direction and has at least one bend. One end of the first transition bar is connected to the leading end of the coil, and the other end is vertically connected to one end of a second transition bar. The other end of the second transition bar is connected to the low-voltage bushing;

[0008] The connecting bar is respectively connected to the first transition bar and the trailing end of the coil;

[0009] The lead bar assemblies are arranged below the transformer.

[0010] Further, the angle of the bend is 90 degrees.

[0011] Further, the sizes of the first transition row and the second transition row are determined according to the position of the coil head end.

[0012] Further, the second transition row is in an "L" shape.

[0013] Further, the cross-section of the connection row is a plurality of "Ji" characters arranged in a straight line, and the coil tail end is connected to the side of the connection row away from the first transition row.

[0014] Further, the lead row assembly further includes a plurality of clamping members for clamping and fixing the connection row and the transition assembly.

[0015] Further, the clamping member is laminated wood.

[0016] Further, a plurality of insulating partitions are provided between the connection row and the first transition row.

[0017] To achieve the above object, the present invention further provides a transformer, including the lead row structure on both sides of the low-voltage bushing described in any one of the above.

[0018] The present invention has the following beneficial effects:

[0019] 1. In the present invention, the original upper lead row is changed to a lower lead row. The first transition row is in the horizontal direction and is provided with a bend and is vertically connected to the second transition row. The coil head end is connected to the low-voltage bushing through the first transition row and the second transition row to achieve electrical conduction, effectively shortening the lead path, reducing the amount of lead row used, while reducing the temperature rise of the transformer, avoiding damage to the transformer due to high temperature, and improving the service life of the transformer.

[0020] 2. In the present invention, it is a lower low-voltage lead row, reducing the amount of lead row used, and thus can save the manufacturing cost of the transformer.

[0021] 3. In the present invention, the first transition row is in the horizontal direction and is provided with a bend and is vertically connected to the second transition row, with reasonable and tight connection, compact and beautiful appearance, and stable overall structure, having a wide range of application scenarios. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the lead row structure on both sides of the low-voltage bushing of an embodiment of the present invention;

[0024] Figure 3 is a front view of the lead row structure on both sides of the low-voltage bushing of an embodiment of the present invention;

[0025] Figure 4It is a top view of the lead row structure with leads coming out from both sides of the low-voltage bushing according to an embodiment of the present invention;

[0026] Figure 5 It is a schematic structural diagram of a connection row according to an embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of the overall structure of the prior art;

[0028] Figure 7 It is a schematic diagram of the lead row structure of the prior art;

[0029] Figure 8 It is a front view of the lead row structure of the prior art.

[0030] In the figure: 1. Connection row; 2. Transition component; 21. First transition row; 22. Second transition row; 3. Low-voltage bushing; 4. Clamping fixture; 5. Insulating partition. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] In an embodiment of the present invention, as Figure 1 and Figure 2 shown, a lead row structure with leads coming out from both sides of a low-voltage bushing includes two groups of lead row components. The lead row components include a connection row 1 and multiple groups of transition components 2; the transition component 2 includes a first transition row 21, the first transition row 21 is in the horizontal direction and is provided with at least one bend. One end of the first transition row 21 is connected to the coil head, and the other end is vertically connected to one end of a second transition row 22. The other end of the second transition row 22 is connected to the low-voltage bushing 3; the connection row 1 is respectively connected to the first transition row 21 and the coil tail. The lead row components are arranged below the transformer.

[0033] It can be understood that in this embodiment, the original upper-out lead row is changed to a lower-out lead row. The first transition row 21 is provided with a bend and is vertically connected to the second transition row 22. The coil head is connected to the low-voltage bushing 3 through the first transition row 21 and the second transition row 22 to achieve electrical conduction. This embodiment effectively shortens the lead path, reduces the amount of lead row used, while reducing the temperature rise of the transformer, avoiding damage to the transformer due to high temperature, and improving the service life of the transformer. In this embodiment, the amount of lead row used is reduced, thereby saving the manufacturing cost of the transformer. In addition, the connection in this embodiment is reasonable and tight, compact and beautiful, and the overall structure is stable, with a wide range of application scenarios.

[0034] In the above embodiment, the lead frame usage is 110 kg / unit. Compared with the lead frame usage in the current existing technology (240 kg / unit), it is reduced by 46%. The reduction in the lead frame usage can reduce the heat generated when the current flows through the lead frame, and reduce the temperature rise of the transformer. According to the test data of the prototype, the temperature rise of the transformer is significantly reduced. In the above embodiment, the top oil temperature rise is 52 K (the top oil temperature rise in the existing technology is 58.4 K).

[0035] In the above embodiment, as Figure 4 shown, the bending angle is 90 degrees. Two sets of lead frame assemblies are arranged around the transformer, showing a non-closed rectangular shape. In actual application, different bending angles can be set according to the actual situation.

[0036] In the above embodiment, as Figures 2-4 shown, the sizes of the first transition row 21 and the second transition row 22 are determined according to the positions of the coil heads. Optionally, the transformer is a three-phase coil, and the heads of the three-phase coils are respectively connected to a set of transition components 2, that is, the first transition row 21 is connected to the coil head. Since the positions of the coil heads are different, the first transition row 21 has different sizes. The second transition row 22 is connected to the first transition row 21. Therefore, the size of the second transition row 22 is set differently according to the positions of the coil heads and to ensure the aesthetics of the overall structure. Optionally, for the convenience of actual production, the sizes of the second transition rows 22 can be kept the same. Optionally, the shapes of the first transition row 21 and the second transition row 22 are similar to that of the connection row 1.

[0037] In the above embodiment, as Figure 3 shown, the second transition row 22 is in an "L" shape. The "L" shape of the second transition row 22 not only facilitates the connection to the low-voltage bushing 3, but also facilitates the clamping and fixing of the second transition rows 22 on the same side of the transformer with the clamping fixture 4. Optionally, the side walls at the connection points of multiple second transition rows 22 and the low-voltage bushing 3 are flush, and the upper surfaces of multiple second transition rows 22 are on the same plane, which is convenient for subsequent processing and can also make the overall structure more compact and beautiful.

[0038] In the above embodiment, as Figure 1 and Figure 5 shown, the cross-section of the connection row 1 is multiple "J" shapes arranged in a straight line, and the coil tails are connected to the side of the connection row 1 away from the first transition row 21. The coil tails are connected to one side of the connection row 1, while the coil heads are connected to the other side of the connection row 1, that is, the connection row 1 is arranged between the coil heads and the coil tails. The "J" shape facilitates the connection of the connection row 1 to multiple coil tails and multiple first transition rows 21, making the structural connection more reasonable and tight, and the overall more beautiful.

[0039] In the above embodiment, as Figure 2As shown in the figure, the lead row assembly further includes a plurality of clamping fixtures 4, which are used to clamp and fix the connection row 1 and the transition assembly 2. Optionally, the clamping fixture 4 is a square piece, which is formed by screwing together a plurality of clamping blocks. Optionally, one clamping fixture 4 is provided at the bending position of the connection row 1 and the plurality of first transition rows 21 close to the first transition row 21 in the same group of lead row assemblies. This clamping fixture 4 can not only clamp the connection row 1 and the first transition row 21 together, but also fix them to the transformer. Optionally, they can also be fixed to the bracket of the transformer. Optionally, one clamping fixture 4 is provided at the position of the plurality of second transition rows 22 close to the low-voltage bushing 3 in the same group of lead row assemblies. This clamping fixture 4 clamps and fixes the plurality of second transition rows 22 in the same group, making the positions of the second transition rows 22 on the same side of the transformer more stable, avoiding vibrations of the second transition rows 22 caused by vibrations during the operation of the transformer, and making the overall structure more stable.

[0040] In the above embodiment, as Figure 4 shown, the clamping fixture 4 is laminated wood. Laminated wood has good insulation and high mechanical strength. It can also be cut, drilled, polished and other processes according to needs to make support plates of various shapes and sizes for the support and fixation of equipment, ensuring the safe and stable operation of the equipment. In this embodiment, the rows are clamped and fixed to the support plate of the clamping part by laminated wood, and the lead row assembly can also be fixedly connected to the transformer by laminated wood, and the laminated wood can play a supporting and fixing role.

[0041] In the above embodiment, as Figures 2-4 shown, a plurality of insulating partitions 5 are provided between the connection row 1 and the first transition row 21. The insulating partition 5 has excellent insulation performance, can prevent transformer failures, and provides an important guarantee for the normal operation and safe use of the transformer.

[0042] In an embodiment of the present invention, as Figure 1 shown, a transformer includes the lead row structure on both sides of the low-voltage bushing in any of the above embodiments.

[0043] It can be understood that in this embodiment, the lead row structure is arranged below the transformer. The layout of the low-voltage lead row is changed from the original upper outlet to the lower outlet. While reducing the amount of lead rows, the temperature rise of the transformer is significantly reduced, avoiding damage to the transformer and improving the service life of the transformer. And this embodiment reduces the amount of lead rows, saving the manufacturing cost. At the same time, the connection in this embodiment is reasonable and tight, and the structure is stable, with a wide range of application scenarios.

[0044] In the above embodiment, the wiring path of one group of lead row assemblies of the present invention is:

[0045] The coil heads are a1, b1, and c1, and the coil tails are x1, y1, and z1. The coil tails x1, y1, and z1 are connected through the connection row x1-y1-z1. The coil head a1 is connected to the head end of the first transition row a1-1. The first transition row a1-1 is bent 90 degrees after passing through the horizontal direction, and then is vertically connected to the second transition row a1-2 at the end, and is connected to the a1 bushing through the vertical second transition row a1-2; the coil head b1 is connected to the head end of the first transition row b1-1. The first transition row b1-1 is bent 90 degrees after passing through the horizontal direction, and then is vertically connected to the second transition row b1-2 at the end, and finally is connected to the b1 bushing through the vertical second transition row b1-2; the coil head c1 is connected to the head end of the first transition row c1-1. The first transition row c1-1 is bent 90 degrees after passing through the horizontal direction, and then is vertically connected to the second transition row c1-2 at the end, and finally is connected to the c1 bushing through the vertical second transition row c1-2; among them, the assembly sequence is: x1-y1-z1 → c1-1 → c1-2 → b1-1 → b1-2 → a1-1 → a1-2.

[0046] In the above embodiment, the wiring path of another set of lead row components of the present invention is:

[0047] The coil heads are a2, b2, and c2, and the coil tails are x2, y2, and z2. The coil tails x2, y2, and z2 are connected through the connection row x2-y2-z2. The coil head a2 is connected to the head end of the first transition row a2-1. The first transition row a2-1 is bent 90 degrees after passing through the horizontal direction, and then is vertically connected to the second transition row a2-2 at the end, and is connected to the a2 bushing through the vertical second transition row a2-2; the coil head b2 is connected to the head end of the first transition row b2-1. The first transition row b2-1 is bent 90 degrees after passing through the horizontal direction, and then is vertically connected to the second transition row b2-2 at the end, and finally is connected to the b2 bushing through the vertical second transition row b2-2; the coil head c2 is connected to the head end of the first transition row c2-1. The first transition row c2-1 is bent 90 degrees after passing through the horizontal direction, and then is vertically connected to the second transition row c2-2 at the end, and finally is connected to the c2 bushing through the vertical second transition row c2-2; among them, the assembly sequence is: x2-y2-z2 → a2-1 → a2-2 → b2-1 → b2-2 → c2-1 → c2-2.

[0048] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A lead row structure with leads coming out from both sides of a low-voltage bushing, characterized in that, It includes two sets of lead row components, and each lead row component includes a connection row (1) and multiple sets of transition components (2); The transition component (2) includes a first transition row (21), the first transition row (21) is in the horizontal direction and has at least one bend, one end of the first transition row (21) is connected to the coil head, and the other end is vertically connected to one end of a second transition row (22), and the other end of the second transition row (22) is connected to a low-voltage bushing (3); The connection row (1) is respectively connected to the first transition row (21) and the coil tail; The lead row component is arranged below the transformer; The angle of the bend is 90 degrees, and the two sets of lead row components are arranged around the transformer, presenting a non-closed rectangular shape; The second transition row (22) is in an "L" shape; The cross-section of the connection row (1) is multiple "ji" characters arranged in a straight line, and the coil tail is connected to the side of the connection row (1) away from the first transition row (21); One end of the second transition row (22) extends upward along the height direction of the transformer and is vertically connected to one end of the first transition row (21), and the other end of the second transition row (22) extends in a direction away from the transformer perpendicular to the height direction of the transformer; Multiple insulating partitions (5) are provided between the connection row (1) and the first transition row (21).

2. The lead row structure with leads output from both sides of a low-voltage bushing according to claim 1, wherein The sizes of the first transition row (21) and the second transition row (22) are determined according to the position of the coil head.

3. The lead row structure with leads output from both sides of a low-voltage bushing according to claim 1, characterized in that, The lead row component further includes multiple clamping fixtures (4), and the clamping fixtures (4) are used to clamp and fix the connection row (1) and the transition component (2).

4. The lead row structure with leads coming out from both sides of a low-voltage bushing according to claim 3, characterized in that, The clamping fixture (4) is laminated wood.

5. A transformer, characterized in that, It includes a lead row structure with leads coming out from both sides of the low-voltage bushing as described in any one of claims 1-4.

Images