Integral assembly structure and method for transformer tap lead, and transformer

Abstract

An integral assembly structure and method for a transformer tap lead (4), and a transformer. The integral assembly structure comprises a switch frame (1) for mounting of a tap changer (3) and a lead frame (2) for mounting of the tap lead (4), wherein the switch frame (1) is a cage frame, comprising an upper switch bracket (11), a vertical bracket (12), a lower transverse bracket I (13) and a lower transverse bracket II (14); the lead frame (2) comprises two vertical lead frames, one end of each vertical lead frame being connected to the switch frame (1), and the other end thereof being provided with an upper transverse bracket (21) at the upper portion and a lower transverse bracket III (22) at the lower portion; and the upper switch bracket (11) and the upper transverse brackets (21) are connected to an upper fastener (5) of the transformer, and the lower transverse bracket I (13), the lower transverse bracket II (14) and the lower transverse brackets III (22) are connected to a lower fastener (6) of the transformer. During assembly, the tap changer (3) and the tap lead (4) are mounted on the integral assembly structure to combine into an integral structure, and are then integrally mounted on the upper fastener and lower fastener of the transformer; that is, the manufacturing of the tap lead (4) is completed before assembly, thus significantly shortening the manufacturing time for the transformer, improving the production efficiency.

Description

An integral assembly structure and method for transformer tapping leads and transformer Technical Field

[0001] The present invention relates to the technical field of power transformers, in particular to an integral assembly structure and method for transformer tap leads. The present invention also relates to a transformer. Background Art

[0002] Currently, the majority of UHV transformer tap changers are located between the voltage regulating coil and the short shaft wall of the oil tank. To meet the electrical insulation requirements of the tap changer and tap leads, the distance between the voltage regulating coil and the short shaft wall of the oil tank is very large, typically no less than 1200mm. This results in large transformer dimensions, a large footprint, and high transformer costs. Furthermore, the UHV transformer tap changer and tap leads are typically fixed directly to the upper and lower clamps of the core. During transformer assembly, lead production cannot begin until the transformer coil is fully assembled and the yoke inserts are attached to the core. This results in lengthy lead production times and low production efficiency, which in turn impacts transformer assembly efficiency.

[0003] Summary of the Invention

[0004] The present invention aims to provide an integral assembly structure for transformer tap leads, so as to overcome the deficiencies in the prior art.

[0005] To solve the above technical problems, the present invention provides a technical solution: an integrated assembly structure for transformer tap leads, comprising a switch frame for mounting a tap changer and a lead frame for mounting the tap leads, the lead frame being connected to the switch frame; the switch frame being a quadrilateral cage frame, comprising an upper switch bracket, vertical brackets, a first lower horizontal bracket, and a second lower horizontal bracket, wherein four vertical brackets are provided and located at the four corners of the cage; the upper switch bracket, for supporting the upper portion of the tap changer, is disposed at the top of the vertical brackets and connects to the tops of the four vertical brackets; the first and second lower horizontal brackets are disposed in parallel and disposed at the bottom of the vertical brackets, and are respectively connected to two vertical brackets; the lead frame comprises two parallel lead vertical brackets, each of the two lead vertical brackets having one end connected to a vertical bracket, and an upper horizontal bracket connected to the two lead vertical brackets at the upper end of the other end, and a lower horizontal bracket connected to the two lead vertical brackets at the lower end; the upper switch bracket and the upper horizontal bracket are connected to the upper clamp of the transformer, and the first, second, and third lower horizontal brackets are connected to the lower clamp of the transformer. During operation, the tap changer and the tap lead are installed on the overall assembly structure to form a whole, and the tap lead is made on the tooling. After the production is completed, the whole is assembled on the upper and lower clamps of the transformer to realize the overall assembly of the tap changer and the tap lead. There is no need to wait until the transformer coil is completed and the iron yoke is inserted on the iron core before starting to make the lead. After the overall assembly, the tap lead only needs to be connected to the coil outlet to complete the production of the tap lead, which can greatly shorten the lead production time and improve production efficiency.

[0006] Furthermore, in the above-mentioned overall assembly structure of the transformer tap lead, the switch frame also includes a switch lower bracket, which is an I-shaped structure, arranged in the middle of the vertical bracket and connected to the four vertical brackets, and the switch lower bracket is provided with a bottom support plate for supporting the bottom of the tap changer.

[0007] Furthermore, in the above-mentioned overall assembly structure of the transformer tap lead, the switch upper bracket includes a bracket body, the bracket body is a U-shaped opening structure, and a mounting interface connected to the upper clamp is provided on the outer side of the closed end of the bracket body. Mounting seats connected to the vertical bracket are provided on both sides of the bracket body, and limit plates located between the mounting seats are also provided on both sides of the bracket body. The limit plates can prevent the tap changer from moving in series during hoisting.

[0008] Furthermore, the above-mentioned overall assembly structure of the transformer tap lead, the lead vertical frame located on the outside includes a lead vertical bracket 1 and a lead vertical bracket 3 arranged parallel to the vertical bracket and a horizontal bracket 1, a horizontal bracket 3, and a horizontal bracket 5 arranged parallel from bottom to top, the two ends of the lead vertical bracket 1 extend to the upper clamp and the lower clamp, the horizontal bracket 1, the horizontal bracket 3, and the horizontal bracket 5 are arranged in the middle of the lead vertical bracket 1, and one end is connected to the vertical bracket, the other end is connected to the lead vertical bracket 1 and extends to the outside of the lead vertical bracket 1, the lead vertical bracket 3 is arranged in the middle of the lead vertical frame, one end is connected to the horizontal bracket 1, and the other end is connected to the horizontal bracket 5.

[0009] Furthermore, the above-mentioned overall assembly structure of the transformer tap lead, the lead vertical frame located on the inner side includes a lead vertical bracket 2 and a lead vertical bracket 4 arranged parallel to the vertical bracket, and a horizontal bracket 7, a horizontal bracket 2, a horizontal bracket 4, and a horizontal bracket 6 arranged parallel from bottom to top. The lead vertical bracket 2 is arranged at the same height as the lead vertical bracket 1, and the horizontal bracket 7, the horizontal bracket 2, the horizontal bracket 4, and the horizontal bracket 6 are arranged in the middle of the lead vertical bracket 2, and one end is connected to the vertical bracket, and the other end is connected to the lead vertical bracket 2 and extends to the outside of the lead vertical bracket 2. The lead vertical bracket 4 is arranged in the middle of the lead vertical frame, one end is connected to the horizontal bracket 7, and the other end is connected to the horizontal bracket 6.

[0010] Furthermore, in the above-mentioned integral assembly structure of the transformer tap lead, a terminal is cold-pressed and welded on one side of the tap lead, the terminal is bolted to the switch contact of the tap changer, and the other side of the tap lead is cold-pressed and connected to the coil outlet using a wiring sleeve.

[0011] The present invention also provides an integral assembly method of a transformer tap lead, comprising the following steps:

[0012] S1. Assemble the switch frame and tap changer, and install the switch frame on the assembly tool;

[0013] S2, assembling the lead frame;

[0014] S3. Installing tap leads on the lead frame;

[0015] S4. Connect the tap changer to the tap lead, cold-press weld the terminal block on one side of the tap lead, and install the terminal block on the switch contact of the tap changer with bolts;

[0016] S5. Install the overall assembly structure. Lift the switch frame at the upper bracket and upper horizontal bracket. After the lifting rope is stressed and tightened, disconnect the switch frame from the assembly tooling. Then, hoist the overall assembly structure onto the transformer body and connect the overall assembly structure to the upper and lower clamps to achieve the connection between the overall assembly structure and the transformer body.

[0017] S6. Connect the tap lead wires by cold pressing the other side of the tap lead wire to the coil outlet using a sleeve according to the wiring schematic diagram to complete the tap lead wire production.

[0018] Furthermore, in the above-mentioned overall assembly method of the transformer tap lead, the assembly steps of the switch frame and the tap changer are as follows:

[0019] S11. Install the switch upper bracket, lower horizontal bracket 1, and lower horizontal bracket 2 on the assembly tool;

[0020] S12. Install the tap changer onto the switch upper bracket;

[0021] S13. Install four vertical brackets between the switch upper bracket and the lower horizontal bracket 1 and lower horizontal bracket 2 to form a cage-shaped frame;

[0022] S14. Install the switch lower bracket at the bottom of the tap changer to provide bottom support for the tap changer.

[0023] Furthermore, in the above-mentioned overall assembly method of the transformer tap lead, the assembly steps of the lead frame are:

[0024] S21. Install all horizontal brackets on the switch frame;

[0025] S22. Install all lead vertical supports on the horizontal support;

[0026] S23. Install an upper horizontal bracket on the upper part of the lead vertical bracket 1 and the lead vertical bracket 2, install a lower horizontal bracket 3 on the lower part, and set an anti-sinking support at the bottom of the lower horizontal bracket 3 to complete the assembly of the lead frame.

[0027] The present invention also provides a transformer, which includes the above-mentioned integral assembly structure of the transformer tap lead, and a convex portion protruding from the long axis wall of the oil tank of the transformer is provided at one end thereof, and the tap changer is compactly arranged between the voltage regulating coil and the convex portion of the long axis wall of the oil tank.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The tap changer of the present invention is arranged between the voltage regulating coil and the long axis wall of the oil tank. In order to ensure the electrical insulation of the tap changer and the tap lead, the long axis wall of the oil tank is partially protruded. This arrangement has a more compact structure and can reduce the distance between the voltage regulating coil and the short axis wall of the oil tank to about 200 mm, greatly reducing the overall size and floor space of the transformer, and improving the cost performance of the transformer.

[0030] (2) The tap changer and tap lead of the present invention are compactly arranged, which can greatly reduce the external dimensions of the transformer and has a higher cost performance. At the same time, the present invention adopts a modular design, and utilizes a switch frame and a lead frame to combine the tap changer and the tap lead into a whole. The tap lead is manufactured on a tooling, and after the manufacturing is completed, the whole is assembled to the upper and lower clamps of the transformer. There is no need to wait for the transformer coil to be set and the iron yoke to be inserted before manufacturing, which can shorten the manufacturing time of the transformer and improve the production efficiency of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] FIG1 is a front view of the overall assembly structure of the transformer tap lead of the present invention;

[0033] FIG2 is a top view of the overall assembly structure of the transformer tap lead of the present invention;

[0034] FIG3 is a view taken along the line B of FIG1 ;

[0035] FIG4 is a K-direction view of FIG2 ;

[0036] FIG5 is a schematic structural diagram of the switch upper bracket of the overall assembly structure of the transformer tap lead according to the present invention;

[0037] FIG6 is a schematic diagram showing the connection between the overall assembly structure of the transformer tap lead and the assembly tooling of the present invention;

[0038] 7 is a wiring diagram of the tap lead of the transformer tap lead of the present invention;

[0039] FIG8 is a schematic diagram of the prior art of the present invention;

[0040] Figure: 1, switch frame; 11, switch upper bracket; 111, bracket body; 112, mounting interface; 113, mounting base; 114, limit plate; 12, vertical bracket; 13, lower horizontal bracket 1; 14, lower horizontal bracket 2; 15, switch lower bracket; 16, bottom support plate;

[0041] 2. Lead frame; 21. Upper horizontal bracket; 22. Lower horizontal bracket three; 23. Lead vertical bracket one; 24. Lead vertical bracket three; 25. Horizontal bracket one; 26. Horizontal bracket three; 27. Horizontal bracket five; 28. Lead vertical bracket two; 29. ​​Lead vertical bracket four; 210. Horizontal bracket two; 211. Horizontal bracket four; 212. Horizontal bracket six; 213. Horizontal bracket seven;

[0042] 3. Tap changer; 4. Tap lead; 41. Terminal block; 5. Upper clamp; 6. Lower clamp; 7. Assembly tool; 8. Anti-sinking support; 9. Long axis wall of the oil tank; 91. Protrusion. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] Example 1

[0045] As shown in Figures 1-7, an overall assembly structure for a transformer tap lead includes a switch frame 1 for mounting a tap changer 3 and a lead frame 2 for mounting a tap lead 4, wherein the lead frame 2 is connected to the switch frame 1; the switch frame 1 is a quadrilateral cage frame, including an upper switch bracket 11, a vertical bracket 12, a lower horizontal bracket 13, and a lower horizontal bracket 2 14. The vertical brackets 12 are provided with four, respectively located at the four corners of the cage; the upper switch bracket 11 is used to support the upper part of the tap changer 3, which is provided at the top of the vertical bracket 12 and connected to the tops of the four vertical brackets 12; the lower horizontal bracket 13 and the lower horizontal bracket 2 14 are provided in parallel and are provided on the vertical bracket 1 2, and are respectively connected to two vertical brackets 12; the lead frame 2 includes two parallel lead vertical frames, one end of each of the two lead vertical frames is connected to a vertical bracket 12, and the other end is provided with an upper horizontal bracket 21 connecting the two lead vertical frames at the upper part, and a lower horizontal bracket three 22 connecting the two lead vertical frames at the lower part; the switch upper bracket 11 and the upper horizontal bracket 21 are connected to the upper clamp 5 of the transformer, and the lower horizontal bracket one 13, the lower horizontal bracket two 14, and the lower horizontal bracket three 22 are connected to the lower clamp 6 of the transformer, that is, the upper parts of the switch frame 1 and the lead frame 2 are connected to the upper clamp 5 of the transformer, and the lower parts are connected to the lower clamp 6 of the transformer. During operation, the tap changer 3 and tap lead 4 are mounted on the switch frame 1 and lead frame 2 to form an integral unit. The tap lead is then fabricated on a tooling assembly. After fabrication is complete, the unit is assembled onto the upper and lower clamps of the transformer, achieving integrated assembly of the tap changer and tap lead. This eliminates the need to wait until the transformer coil is assembled and the yoke inserts are attached to the core before fabricating the lead. After overall assembly, only one end of the tap lead needs to be connected to the coil outlet to complete the tap lead fabrication process. This significantly shortens transformer fabrication time and improves production efficiency. Furthermore, the compact arrangement of the tap changer and tap lead can significantly reduce the transformer's overall dimensions, resulting in a more cost-effective design.

[0046] To ensure more stable installation of the tap changer 3, the switch frame 1 also includes an I-shaped lower switch bracket 15, located in the middle of the vertical brackets 12 and connecting the four vertical brackets 12. This lower switch bracket 15 also enhances the overall structural strength and stability of the switch frame 1. A bottom support plate 16 is provided on the lower switch bracket 15 to support the bottom of the tap changer 1. The switch frame 1 has a simple and compact overall structure, which can significantly reduce the overall size of the transformer and provide a more cost-effective solution.

[0047] A terminal 41 is cold-welded on one side of the tap lead 4 coil, which is bolted to the switch contact of the tap changer 3. The other side of the tap lead 4 coil is cold-welded to the coil outlet using a wiring sleeve. The coil outlets include the Am' coil outlet, the A1 upper coil outlet, the A1 lower coil outlet, the upper voltage regulating coil outlet, and the lower voltage regulating coil outlet.

[0048] Example 2

[0049] Based on the structure of Example 1, as shown in Figures 1-3, the switch upper bracket 11 includes a bracket body 111. The bracket body 111 has a U-shaped opening structure to facilitate the installation of the tap changer 3. A mounting interface 112 connected to the upper clamp 5 is provided on the outer side of the closed end of the bracket body 111. Mounting seats 113 connected to the vertical bracket 12 are provided on both sides of the bracket body 111. Limiting plates 114 located between the mounting seats 113 are also provided on both sides of the bracket body 111. The limiting plates 114 can prevent the tap changer 3 from moving in series during hoisting.

[0050] Among them, the lead vertical frame located on the outside includes a lead vertical bracket 23 and a lead vertical bracket 3 24 arranged parallel to the vertical bracket 12, and a horizontal bracket 25, a horizontal bracket 3 26, and a horizontal bracket 5 27 arranged parallel from bottom to top. The two ends of the lead vertical bracket 23 extend to the upper clamp 5 and the lower clamp 6. In order to facilitate the connection between the tap lead 4 and the decomposition switch 3, the horizontal bracket 1 25, the horizontal bracket 3 26, and the horizontal bracket 5 27 are arranged in the middle of the lead vertical bracket 23, and one end is connected to the vertical bracket 12, and the other end is connected to the lead vertical bracket 23 and extends to the outside of the lead vertical bracket 23. The lead vertical bracket 3 24 is arranged in the middle of the lead vertical frame, one end is connected to the horizontal bracket 1 25, and the other end is connected to the horizontal bracket 5 27.

[0051] The inner lead frame includes a second lead frame 28 and a fourth lead frame 29, which are arranged parallel to the vertical frame 12, and horizontal frames 7, 213, 210, 411, and 612, which are arranged parallel to each other from bottom to top. The second lead frame 28 is arranged at the same height as the first lead frame 23. To facilitate the connection of the tap lead 4 to the decomposition switch 3, the seventh horizontal frame 213, the second horizontal frame 210, the fourth horizontal frame 211, and the sixth horizontal frame 212 are arranged in the middle of the second lead frame 28, with one end connected to the vertical frame 12 and the other end connected to the second lead frame 28 and extending to the outside of the second lead frame 28. The fourth lead frame 29 is arranged in the middle of the lead frame, with one end connected to the seventh horizontal frame 213 and the other end connected to the sixth horizontal frame 212. The arrangement of the horizontal frames is based on the arrangement of the tap lead. The overall structure of the lead frame is simple and strong.

[0052] The present invention also provides an integral assembly method of a transformer tap lead, comprising the following steps:

[0053] S1. Assemble the switch frame 1 and the tap changer 3, and install the switch frame 1 on the assembly tool 7;

[0054] S2, assembling lead frame 2;

[0055] S3, installing the tap lead 4 on the lead frame 2;

[0056] S4. Connect the tap changer 3 to the tap lead 4. Cold-weld the terminal 41 on one side of the tap lead 4. Install the terminal 41 on the switch contact of the tap changer 3 with bolts.

[0057] S5. Install the overall assembly structure. Lift the switch frame 11 and the upper horizontal bracket 21 as a whole. After the lifting rope is stressed and tightened, disconnect the switch frame 1 from the assembly tool 7. Then, hoist the overall assembly structure onto the transformer body and connect the overall assembly structure to the upper and lower clamps. That is, connect the switch upper bracket 11 and the upper horizontal bracket 21 to the upper clamp 5, and connect all the lower horizontal brackets to the lower clamp 6 to achieve the connection between the overall assembly structure and the transformer body.

[0058] S6. Connect the tap lead 4 to the Am' coil outlet, A1 upper coil outlet, A1 lower coil outlet, upper voltage regulating coil outlet, and lower voltage regulating coil outlet respectively with a sleeve for cold pressing according to the wiring schematic diagram to complete the production of the tap lead.

[0059] The assembly steps of the switch frame 1 and the tap changer 3 are as follows:

[0060] S11. Install the switch upper bracket 11, lower horizontal bracket 13, and lower horizontal bracket 2 14 on the assembly tool 7; the switch upper bracket 11 is connected to the assembly tool 7 via the mounting interface 112. In this embodiment, the switch upper bracket 11, lower horizontal bracket 13, lower horizontal bracket 2 14, and the assembly tool 7 are all mounted with only four screws, making disassembly and assembly simple;

[0061] S12, installing the tap changer 3 on the switch upper bracket 11;

[0062] S13, install four vertical brackets 12 between the switch upper bracket 11 and the lower horizontal bracket 1 13 and the lower horizontal bracket 2 14 to form a cage-shaped frame;

[0063] S14 . Install the switch lower bracket 15 at the bottom of the tap changer 3 and fix it to the middle of the vertical bracket 12 to provide bottom support for the tap changer 3 .

[0064] The assembly steps of the lead frame 2 are as follows:

[0065] S21. Install all horizontal supports on the switch frame 1;

[0066] S22. Install all lead vertical supports on the horizontal support;

[0067] S23. Install the upper horizontal bracket 21 on the upper part of the lead vertical bracket 1 23 and the lead vertical bracket 2 28, install the lower horizontal bracket 3 22 on the lower part, and set an anti-sinking support 8 at the bottom of the lower horizontal bracket 3 22. The anti-sinking support 8 and the lower horizontal bracket 3 22 do not need to be installed and are in contact and connected to complete the assembly of the lead frame 2.

[0068] The overall assembly method is simple and easy to operate, and the assembly tooling structure is simple and easy to assemble and disassemble, which greatly improves production efficiency.

[0069] Example 3

[0070] Based on the structure of Example 1 or Example 2, as shown in Figures 1-3, the present invention further provides a transformer, which includes the above-mentioned integral assembly structure of the transformer tap lead, and a protrusion 91 protruding from the long axis wall 9 of the oil tank of the transformer is provided at one end thereof, and the tap changer 3 is compactly arranged between the voltage regulating coil and the protrusion 91 of the long axis wall 9 of the oil tank. This can meet the electrical insulation requirements of the tap changer 3 and the tap lead 4, and has a more compact structure. The distance between the voltage regulating coil and the short axis wall of the oil tank can be reduced to approximately 200 mm, thereby greatly reducing the overall size and floor space of the transformer and improving the cost-effectiveness of the transformer.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0072] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An integral assembly structure of a transformer tapping lead, characterized in that: It comprises a switch frame for installing a tap switch and a lead frame for installing a tap lead, wherein the lead frame is connected to the switch frame; the switch frame is a quadrilateral cage frame, comprising an upper switch bracket, a vertical bracket, a lower horizontal bracket 1, and a lower horizontal bracket 2, wherein four vertical brackets are provided and are respectively located at the four corners of the cage; the upper switch bracket is used to support the upper part of the tap switch, which is provided at the top of the vertical bracket and connected to the tops of the four vertical brackets; the lower horizontal bracket 1 and the lower horizontal bracket 2 are provided in parallel, provided at the bottom of the vertical bracket, and respectively connected to the two vertical brackets; the lead frame comprises two parallel lead vertical frames, wherein one end of the two lead vertical frames is respectively connected to a vertical bracket, and the upper part of the other end is provided with an upper horizontal bracket connecting the two lead vertical frames, and the lower part is provided with a lower horizontal bracket 3 connecting the two lead vertical frames; the upper switch bracket and the upper horizontal bracket are connected to the upper clamp of the transformer, and the lower horizontal bracket 1, the lower horizontal bracket 2, and the lower horizontal bracket 3 are connected to the lower clamp of the transformer.

2. The integral assembly structure of the transformer tapping lead according to claim 1, characterized in that: The switch frame also includes a switch lower bracket, which is an I-shaped structure, arranged in the middle of the vertical bracket and connected to four vertical brackets. The switch lower bracket is provided with a bottom support plate for supporting the bottom of the tap switch.

3. The integral assembly structure of transformer tapping leads according to claim 1, characterized in that: The switch upper bracket includes a bracket body, which is a U-shaped opening structure. A mounting interface connected to the upper clamp is provided on the outer side of the closed end of the bracket body. Mounting seats connected to the vertical brackets are provided on both sides of the bracket body. Limit plates located between the mounting seats are also provided on both sides of the bracket body. The limit plates can prevent the tap switch from moving in series during hoisting.

4. The integral assembly structure of transformer tapping leads according to claim 1, characterized in that: The lead vertical frame located on the outside includes a lead vertical bracket 1 and a lead vertical bracket 3 arranged parallel to the vertical bracket, and a horizontal bracket 1, a horizontal bracket 3, and a horizontal bracket 5 arranged parallel from bottom to top. The two ends of the lead vertical bracket 1 extend to the upper clamp and the lower clamp. The horizontal bracket 1, the horizontal bracket 3, and the horizontal bracket 5 are arranged in the middle of the lead vertical bracket 1, and one end is connected to the vertical bracket, and the other end is connected to the lead vertical bracket 1 and extends to the outside of the lead vertical bracket 1. The lead vertical bracket 3 is arranged in the middle of the lead vertical frame, one end is connected to the horizontal bracket 1, and the other end is connected to the horizontal bracket 5.

5. The integral assembly structure of transformer tapping leads according to claim 4, characterized in that: The lead vertical frame located on the inner side includes a lead vertical bracket 2 and a lead vertical bracket 4 which are arranged parallel to the vertical bracket, and a horizontal bracket 7, a horizontal bracket 2, a horizontal bracket 4, and a horizontal bracket 6 which are arranged parallel from bottom to top. The lead vertical bracket 2 is arranged at the same height as the lead vertical bracket 1. The horizontal bracket 7, the horizontal bracket 2, the horizontal bracket 4, and the horizontal bracket 6 are arranged in the middle of the lead vertical bracket 2, and one end is connected to the vertical bracket, and the other end is connected to the lead vertical bracket 2 and extends to the outside of the lead vertical bracket 2. The lead vertical bracket 4 is arranged in the middle of the lead vertical frame, one end is connected to the horizontal bracket 7, and the other end is connected to the horizontal bracket 6.

6. The integral assembly structure of transformer tapping leads according to claim 1, characterized in that: A terminal is cold-pressed and welded on one side of the tap lead, and the terminal is bolted on the switch contact of the tap switch. The other side of the tap lead is cold-pressed and connected to the coil outlet through a wiring sleeve.

7. The method for integrally assembling the integrally assembling structure of transformer tapping leads according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Assemble the switch frame and the tap changer, and install the switch frame on the assembly tool; S2, assembling lead frame; S3, installing the tap lead on the lead frame; S4. Connect the tap changer and tap lead, cold press weld the terminal block on one side of the tap lead, and wire the tap The terminal is bolted onto the switch contact of the tap changer; S5. Install the overall assembly structure, lift the switch frame and the upper horizontal bracket as a whole, and disconnect the switch frame and the assembly tooling after the lifting rope is stressed and tightened; then lift the overall assembly structure onto the transformer body, connect the overall assembly structure with the upper clamp and the lower clamp, and realize the connection between the overall assembly structure and the transformer body; S6. Connect the wires. Use a sleeve to cold-press the other side of the tap lead to the coil outlet according to the wiring schematic diagram to complete the tap lead production.

8. The integral assembly method of transformer tapping leads according to claim 7, characterized in that: The assembly steps of the switch frame and the tap changer are as follows: S11, installing the switch upper bracket, lower horizontal bracket 1, and lower horizontal bracket 2 on the assembly tool; S12. Install the tap changer onto the switch upper bracket; S13, installing four vertical brackets between the switch upper bracket and the lower horizontal bracket 1 and the lower horizontal bracket 2 to form a cage-shaped frame; S14. Install the switch lower bracket at the bottom of the tap changer to provide bottom support for the tap changer.

9. The integral assembly method of transformer tapping leads according to claim 7, characterized in that: The assembly steps of the lead frame are: S21. Install all horizontal brackets on the switch frame; S22. Install all lead vertical brackets on the horizontal bracket; S23. Install an upper horizontal bracket on the upper part of the lead vertical bracket 1 and the lead vertical bracket 2, install a lower horizontal bracket 3 on the lower part, and set an anti-sinking support at the bottom of the lower horizontal bracket 3 to complete the assembly of the lead frame.

10. A transformer, characterized in that: The invention comprises an integral assembly structure of a transformer tapping lead according to any one of claims 1 to 6, wherein one end of the long axis wall of the oil tank of the transformer is provided with a convex portion protruding from the long axis wall of the oil tank, and the tap switch is compactly arranged between the voltage regulating coil and the convex portion of the long axis wall of the oil tank.

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