A transformer coil assembly employing a wound positioning leg composite structure

Abstract

The application relates to the technical field of transformers and discloses a transformer coil assembly adopting a winding positioning support composite structure, which comprises an insulating sleeve, left-right symmetrical mounting plates are fixedly connected to the insulating sleeve, an isolation part for isolating windings and an iron core is connected to the mounting plate on the right side, and a ventilation part for assisting heat dissipation of the windings is further arranged on the insulating sleeve and the mounting plate; wherein the isolation part comprises annular plates, a plurality of annular plates are uniformly and slidably nested from inside to outside, and a plurality of supports are fixedly connected to the left end of the annular plates in a uniform circumferential direction. The transformer coil assembly adopting the winding positioning support composite structure can effectively solve the problems that, in the prior art, when a transformer support is manually installed, operation deviation is prone to occurring, the spacing of the supports is uneven, the distance between the windings and the iron core or between adjacent windings is uneven, and the problems of insufficient insulation, space waste and aggravated magnetic leakage are caused.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and more specifically to a transformer coil assembly employing a composite structure of wound positioning support bars. Background Technology

[0002] Small transformers typically require support bars in their windings. The core reason for this is the potential difference between the core and the high- and low-voltage windings. By installing support bars, a safe insulation distance is maintained between the three components through physical isolation, effectively preventing insulation breakdown caused by direct contact between the conductor and the core or excessively close spacing between windings. Simultaneously, the support bars create heat dissipation channels (including ventilation or oil channels), preventing heat buildup that accelerates the aging of insulation materials (such as the varnish on enameled wire), thereby extending the transformer's service life.

[0003] The support bars are generally evenly distributed along the circumference of the iron core column and are manually pasted onto the insulating paper. This installation method is prone to the following problems: During manual installation, a ruler is needed for marking and positioning, making the installation process cumbersome. Even after marking is completed, the position may still shift due to operational deviations during installation, resulting in uneven spacing between the support bars. Uneven spacing between the support bars will cause the winding to shift to the side with a larger spacing after winding. On the one hand, this will cause the spacing between the winding and the iron core or between adjacent windings to be too small on one side, causing insufficient insulation. On the other hand, the spacing will be too large, which will not only waste space but also aggravate the leakage flux phenomenon. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a transformer coil assembly employing a composite structure of wound positioning support bars. This effectively solves the problem in existing technologies where manual installation of transformer support bars can easily lead to operational deviations, resulting in uneven spacing between the support bars. Consequently, uneven distances between the windings and the core or between adjacent windings can occur, leading to insufficient insulation, wasted space, and exacerbated magnetic leakage.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a transformer coil assembly employing a composite structure of wound positioning support bars, comprising:

[0007] An insulating sleeve is provided, on which mounting plates are symmetrically fixedly connected. An isolation part for isolating the winding and the iron core is connected to the mounting plate on the right side. Ventilation parts for auxiliary winding heat dissipation are also provided on the insulating sleeve and the mounting plate.

[0008] The isolation section includes an annular plate, and multiple annular plates are uniformly slidably nested from the inside to the outside. Multiple support bars are uniformly fixedly connected to the left end of the annular plate along the circumferential direction, and the support bars on the multiple annular plates correspond one-to-one.

[0009] The two mounting plates are provided with stepped grooves that correspond to the support bars evenly distributed along the circumference on the left side. The left end of the support bar is provided with a docking component that matches the stepped groove. The right end of the mounting plate on the right side is connected with an interlocking component that restricts the installation sequence of the support bars.

[0010] The support bar is connected to a support component to prevent it from bending.

[0011] Furthermore, the docking assembly includes a waist-shaped groove, the left end of the support bar has a through waist-shaped groove, and the left end of the support bar has a chamfered edge and a locking block fixedly connected thereto.

[0012] Furthermore, the interlocking assembly includes a locking block, which slides radially along the right mounting plate and has multiple blocks evenly arranged circumferentially at the right end of the mounting plate. Except for the innermost support bar, each of the other support bars has a slot and is slidably connected to the locking block through the slot. Each support bar has a push block slidably connected to its right end. A synchronization module is connected to the right mounting plate to keep the multiple locking blocks sliding synchronously.

[0013] Furthermore, the locking block adopts a two-section design, with the width of the end of the locking block near the geometric center of the mounting plate on the right side being smaller than the width of the end of the locking block away from the mounting plate on the right side, and the two sections of the locking block are smoothly transitioned by a chamfer.

[0014] Furthermore, the right end face of the narrower section of the locking block is designed with a bevel, and the left end face of the push block is also designed with a bevel of the same angle as the locking block, and the length of the bevel of the push block is greater than the length of the bevel on the locking block.

[0015] Furthermore, the synchronization module includes a ring frame, which is damped and rotatably connected to the mounting plate on the right side. Hanging plates are uniformly fixedly connected to the inner circumference of the ring frame, and inclined grooves are formed on the hanging plates. One end of the locking block away from the geometric center of the mounting plate on the right side is slidably connected to the inclined groove through a cylindrical block.

[0016] Furthermore, the support assembly includes a support bar, which is slidably connected to the support bar. A support block is uniformly fixedly connected to the lower end of the support bar. A stop block is fixedly connected to the right end of the push block. A guide rod is symmetrically fixedly connected to the left end of the push block. The left end of the guide rod slides through the support bar and is fixedly connected to a moving block through a return spring. The right end of the support bar and the left end of the moving block adopt a chamfered design that cooperates with each other.

[0017] Furthermore, the ventilation section includes straight grooves. The outer circumferential surface of the insulating sleeve is uniformly provided with straight grooves extending into and communicating with the mounting plate. The end of the mounting plate away from the insulating sleeve is detachably connected to a sealing plate. The center of the sealing plate on the right side is provided with a slot to avoid interference with the annular plate. The mounting plate is uniformly provided with curved grooves aligned with the stepped grooves from the inside to the outside along the circumferential direction. Both sealing plates are uniformly provided with through holes.

[0018] Furthermore, the right end face of the left sealing plate is uniformly fixed with multiple limiting strips that are adapted to the waist-shaped groove along the circumferential direction, and the right end of the limiting strips is chamfered.

[0019] The technical solution provided by this invention has the following advantages compared with the prior art:

[0020] 1. In this embodiment, the support bars are pre-fixed uniformly along the circumference of the annular plate. The annular plates of different diameters can be adapted to different winding requirements, ensuring the uniformity of the initial layout of the support bars from the source. During the operation, the annular frame is rotated before installation, and the locking block is driven to slide radially through the inclined groove of the hanging plate, so that the locking block is inserted into the slot of each support bar, correcting the position of all support bars and avoiding manual positioning errors. Subsequently, each layer of support bars is precisely connected to the docking component through the stepped groove, further ensuring that the spacing of each layer of support bars is consistent, and ultimately preventing insulation insufficiency and magnetic leakage problems caused by winding offset.

[0021] 2. In traditional processes, the support bar needs to be glued to the insulating paper with insulating adhesive, and the adhesive needs to dry, which prolongs the winding cycle. This component replaces the adhesive bonding with a mechanical locking docking structure. In this embodiment, after winding one layer of coil and insulating paper, it is only necessary to push the corresponding annular plate so that the left end of the support bar locks with the stepped groove of the left mounting plate through the locking block, and then it can directly enter the next winding process, completely eliminating the adhesive drying time and greatly improving assembly efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the separation structure according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the separation structure of the isolation section in an embodiment of the present invention;

[0026] Figure 4 This is an embodiment of the present invention. Figure 3 A magnified structural diagram of part A in the middle;

[0027] Figure 5 This is a schematic diagram of the interlocking component according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the detached structure of the support component according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the separation structure of the ventilation section in an embodiment of the present invention.

[0030] The labels in the diagram represent: 1. Insulating sleeve; 2. Mounting plate; 21. Stepped groove; 3. Isolation section; 31. Annular plate; 32. Support bar; 33. Connecting assembly; 331. Waist-shaped groove; 332. Locking block; 333. Limiting bar; 34. Interlocking assembly; 341. Locking block; 342. Locking groove; 343. Push block; 344. Synchronization module; 3441. Annular frame; 3442. Hanging plate; 3443. Inclined groove; 3444. Columnar block; 35. Support assembly; 351. Support bar; 352. Support block; 353. Abutment block; 354. Guide rod; 355. Moving block; 4. Ventilation section; 41. Straight groove; 42. Sealing plate; 43. Curved groove; 44. Through hole. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] The present invention will be further described below with reference to embodiments.

[0033] Example:

[0034] Please see Figure 1 - Figure 7 This invention provides a technical solution: a transformer coil assembly employing a composite structure of wound positioning support bars, comprising:

[0035] An insulating sleeve 1 is provided, and mounting plates 2 are symmetrically fixedly connected to the insulating sleeve 1 on the left and right sides. An isolation part 3 for isolating the winding and the iron core is connected to the mounting plate 2 on the right side. Ventilation parts 4 for assisting the cooling of the winding are also provided on the insulating sleeve 1 and the mounting plate 2.

[0036] The isolation part 3 includes an annular plate 31, and multiple annular plates 31 are uniformly slidably nested from the inside to the outside. Multiple support bars 32 are uniformly fixedly connected to the left end of the annular plate 31 along the circumferential direction, and the support bars 32 on the multiple annular plates 31 correspond one-to-one.

[0037] Among them, the left side of the two mounting plates 2 are respectively uniformly provided with stepped grooves 21 corresponding to the support bars 32 along the circumferential direction, the left end of the support bars 32 is provided with a docking component 33 adapted to the stepped grooves 21, and the right end of the mounting plate 2 on the right side is connected with an interlocking component 34 that restricts the installation order of the support bars 32.

[0038] The support bar 32 is connected to a support component 35 to prevent it from bending.

[0039] Specifically, in the assembly process of conventional transformer windings, each layer of support bars 32 is usually manually operated, positioned with the aid of a ruler and evenly pasted onto the insulating paper with insulating adhesive. This traditional process has two significant problems: First, it requires a high level of skill from the operators. Even if the operators have the necessary skills, human factors such as hand tremors can still cause deviations in the pasting position of the support bars 32, resulting in uneven spacing between the support bars 32 and ultimately adversely affecting the overall manufacturing quality of the winding. Second, after pasting the support bars 32 with insulating adhesive, a certain amount of time needs to be allowed for the adhesive to dry completely. This drying process prolongs the overall cycle of the winding process, directly causing a decrease in the production efficiency of the transformer windings.

[0040] To address the shortcomings of traditional processes, this embodiment improves upon the conventional method of independently attaching support bars 32. By pre-fixing the support bars 32 to be installed evenly onto the annular plate 31, precise control of the spacing between each support bar 32 can be achieved, effectively avoiding errors caused by manual operation and ensuring the consistency and accuracy of the support bar 32 layout. Simultaneously, multiple sets of annular plates 31 with different diameters can be configured according to the transformer's design parameters (such as the number of winding turns), significantly expanding the applicability of the coil assembly, meeting the assembly requirements of different transformer models, and enhancing its versatility.

[0041] Before installation, the isolation section 3 and the insulating sleeve 1 are assembled. The specific process is as follows: Following the order from the inside out, align the docking components 33 at the left end of each support bar 32 with the corresponding stepped grooves 21 on the right mounting plate 2 and complete the insertion and mating, thereby achieving the initial docking of the support bar 32 and the right mounting plate 2. In this assembled state, the left end face of the support bar 32 does not extend beyond the left end face of the right mounting plate 2. This structural design can effectively prevent the support bar 32 from snagging with the conductor during subsequent winding, reduce the incidence of unexpected failures in the winding process, and ensure the smoothness of the winding operation.

[0042] During installation, the innermost coil is first wound onto the insulating sleeve 1 manually or using a winding machine. After the coil is wound, insulating paper is wrapped around its outer side. Then, the innermost annular plate 31 and its connected support strips 32 are pushed to the left manually or using automated equipment until the left end of the support strips 32 is inserted into the stepped groove 21 of the left mounting plate 2. With the synergistic action of the stepped groove 21 of the left mounting plate 2 and the left end docking assembly 33 of the support strips 32, the left end of the support strips 32 on the innermost annular plate 31 is reliably locked into the left mounting plate 2, thus achieving a stable fixation of the innermost support strips 32. This fixing method does not rely on insulating adhesive, thus eliminating the time required for the insulating adhesive to dry, significantly shortening the winding assembly cycle and significantly improving production efficiency.

[0043] After the innermost support bar 32 is fixed, the outermost coil is wound around the outer side of the innermost support bar 32. After the outermost coil is wound, insulating paper is also wound around its outer side. Then, using the same operation method as above, the innermost ring plate 31 and its support bar 32 are pushed to align and lock with the corresponding stepped groove 21 on the left mounting plate 2. Then, the coil is wound around the outer side of the innermost support bar 32.

[0044] By repeating the above process, each layer of support bar 32 can be accurately positioned and firmly fixed, and finally assembled to form a transformer coil with stable structure and reliable performance.

[0045] The docking assembly 33 includes a waist-shaped groove 331. The left end of the support bar 32 has a through waist-shaped groove 331. The left end of the support bar 32 has a chamfered edge and a locking block 332 is fixedly connected. The waist-shaped groove 331 at the left end of the support bar 32 allows the support bar 32 to undergo slight elastic deformation, so that the locking block 332 at the left end of the support bar 32 can be smoothly inserted into the stepped groove 21 and automatically reset after being inserted into the stepped groove 21 to form a lock.

[0046] The interlocking assembly 34 includes a locking block 341. The locking block 341 slides radially along the right mounting plate 2 and is evenly distributed circumferentially at the right end of the mounting plate 2. Except for the innermost support bar 32, the other support bars 32 are provided with slots 342 and are slidably connected to the locking block 341 through the slots 342. The right end of each support bar 32 is fixedly connected to a push block 343. The right mounting plate 2 is connected to a synchronization module 344 that keeps the multiple locking blocks 341 sliding synchronously.

[0047] The locking block 341 adopts a two-section design. The width of the end of the locking block 341 near the geometric center of the mounting plate 2 on the right side is smaller than the width of the end of the locking block 341 away from the mounting plate 2 on the right side, and the two sections of the locking block 341 are smoothly transitioned by chamfering.

[0048] The right end face of the narrower section of the locking block 341 is designed with a slope, and the left end face of the push block 343 is also designed with the same slope as the locking block 341, and the length of the slope of the push block 343 is greater than the length of the slope on the locking block 341.

[0049] The synchronization module 344 includes a ring frame 3441, which is damped and rotatably connected to the mounting plate 2 on the right side. Hanging plates 3442 are uniformly fixedly connected to the inner circumference of the ring frame 3441. An inclined groove 3443 is provided on the hanging plate 3442. One end of the locking block 341 away from the geometric center of the mounting plate 2 on the right side is slidably connected to the inclined groove 3443 through the cylindrical block 3444.

[0050] The support assembly 35 includes a support bar 351, which is slidably connected to the support bar 32. The lower end of the support bar 351 is uniformly fixedly connected to a support block 352. The right end of the push block 343 is fixedly connected to a stop block 353. The left end of the push block 343 is symmetrically fixedly connected to a guide rod 354. The left end of the guide rod 354 slides through the support bar 32 and is fixedly connected to a moving block 355 through a return spring. The right end of the support bar 351 and the left end of the moving block 355 adopt a chamfered design that cooperates with each other.

[0051] Specifically, in the initial state, the ring frame 3441 is at a preset initial rotation angle. At this time, the cylindrical block 3444 is located at the end of the inclined groove 3443 away from the geometric center of the ring frame 3441, which drives the locking block 341 to move away from the geometric center of the right mounting plate 2 and form a staggered distribution with each stepped groove 21. This initial state can effectively avoid the locking block 341 from obstructing the left end of the support bar 32 when it is inserted into the stepped groove 21 during the assembly of the isolation part 3 and the insulating sleeve 1, ensuring the smoothness of the initial insertion action of the support bar 32 and reducing the difficulty of assembly operation.

[0052] After each support bar 32 is inserted into its corresponding stepped groove 21, the ring frame 3441 is rotated, causing the hanging plate 3442 to rotate synchronously. Through the sliding engagement between the inclined groove 3443 on the hanging plate 3442 and the cylindrical block 3444 of the locking block 341, the locking block 341 is driven to move towards the geometric center of the right mounting plate 2. During this process, the locking block 341 will sequentially insert into the slots 342 of each support bar 32, achieving precise correction of the initial position of each support bar 32. This ensures that the left end of all support bars 32 does not exceed the left end face of the right mounting plate 2, fundamentally eliminating the potential risk of the support bars 32 snagging the wire during subsequent winding, and ensuring the safety and stability of the winding process.

[0053] After the locking block 341 completes the alignment of the positions of each support bar 32, all annular plates 31 are coaxially aligned. At this time, the end face of the innermost annular plate 31 will abut against the abutment block 353 on the innermost support bar 32. The abutment block 353 applies a stable clamping force to the push block 343, ensuring that the left end of the push block 343 always abuts against the inner wall of the groove of the support bar 32, thereby restricting the support bar 351 to the position closest to the geometric center of the right mounting plate 2. Similarly, the outer annular plate 31 will also abut against the abutment block 353 of the adjacent inner support bar 32, keeping the support bar 351 of the corresponding support bar 32 in a position close to the geometric center. This ensures that each support bar 351 is in a uniform initial state before winding, avoiding the impact of support bar 351 position deviation on winding accuracy.

[0054] Next, the innermost wire is wound onto the insulating sleeve 1. After the winding is completed, insulating paper is evenly wrapped around the outside of the wire. After the insulating paper is wound, the innermost ring plate 31 is pushed to the left by manual or automated equipment. The ring plate 31 drives the support bar 32 on it to slide to the left in sync.

[0055] During the sliding process, the innermost annular plate 31 and the next innermost annular plate 31 gradually lose contact. The abutment 353 on the innermost support bar 32 is no longer subject to the clamping force of the next innermost annular plate 31. After the push block 343 loses its external force constraint, the support bar 351 can slide freely along the thickness direction of the support bar 32, thus smoothly passing over the stepped groove 21 structure on the right mounting plate 2 and entering the area between the two mounting plates 2, preparing for the subsequent locking of the support bar 32.

[0056] In the final stage of the innermost annular plate 31 sliding to the left, on the one hand, the left end of the support bar 32 will be fully inserted into the stepped groove 21 of the left mounting plate 2, and the initial positioning will be achieved through the docking component 33; on the other hand, the inclined surface of the left end of the push block 343 will contact the inclined surface of the right end of the locking block 341. As the annular plate 31 continues to move to the left, the push block 343 applies radial thrust to the locking block 341 through the inclined surface cooperation, driving the locking block 341 to slide away from the center of the annular frame 3441, so that the wider part of the locking block 341 disengages from the slot 342 of the secondary outer support bar 32, releasing the locking constraint on the secondary outer support bar 32, and preparing for the subsequent sliding of the secondary outer support bar 32.

[0057] Subsequently, the outermost coil is wound around the outer side of the innermost support bar 32. After the coil is wound, insulating paper is also wound around its outer side. The innermost ring plate 31 is pushed to the left manually or by automated equipment. When the innermost ring plate 31 slides to the leftmost end, it will return to the same plane as the innermost ring plate 31. During this process, the innermost ring plate 31 will push the push block 343 to the left through the abutment block 353. The push block 343 drives the moving block 355 to move to the left synchronously through the guide rod 354. The moving block 355 pushes the support bar 351 to slide back to the position closest to the geometric center of the right mounting plate 2 through the chamfering fit. At this time, the support block 352 at the lower end of the support bar 351 will be tightly abutted against the outer surface of the innermost insulating paper. Through the contact support between the support block 352 and the insulating paper, the overall structural strength of the support bar 351 and the support bar 32 is significantly improved, and the support bar 32 is prevented from bending and deforming due to force during the subsequent winding process.

[0058] Following the above operation method, each of the remaining ring plates 31 is pushed in sequence. After each ring plate 31 is pushed, locked, and the coil is wound, the support bar 32 can be accurately installed and fixed. Finally, through this cyclic operation, the installation of all support bars 32 and the winding of the winding can be completed, achieving accurate positioning and easy assembly of the support bars 32. Compared with the conventional method of manually measuring and pasting the support bars 32, this method does not rely on manual positioning and the drying process of insulating glue, which not only greatly reduces the error of manual operation, but also significantly shortens the assembly cycle. At the same time, through the synergistic effect of each component, the structural stability and overall performance of the coil assembly are improved.

[0059] The ventilation section 4 includes a straight groove 41. The outer circumferential surface of the insulating sleeve 1 is uniformly provided with a straight groove 41 extending into and communicating with the mounting plate 2. The end of the mounting plate 2 away from the insulating sleeve 1 is detachably connected to a sealing plate 42. The center of the sealing plate 42 on the right side is provided with a slot to avoid interference with the annular plate 31. The mounting plate 2 is uniformly provided with curved grooves 43 from the inside to the outside along the circumferential direction, which are aligned with the stepped groove 21. Both sealing plates 42 are uniformly provided with through holes 44.

[0060] The right end face of the left sealing plate 42 is uniformly fixed with multiple limiting strips 333 that are adapted to the waist-shaped groove 331. The right end of the limiting strip 333 is chamfered.

[0061] Specifically, after the outermost annular plate 31 slides to the leftmost end and is positioned, the right-side sealing plate 42 is first fixedly installed on the right-side mounting plate 2. The sealing plate 42 applies stable pressure to the abutment 353 on the outermost support bar 32, causing the support bar 351 to return to its initial support position under pressure, ensuring the structural strength of the support bar 32. Subsequently, the left-side sealing plate 42 is correspondingly fixedly installed on the left-side mounting plate 2. The positional stability of each layer of support bars 32 is further enhanced through the cooperation between the limiting strip 333 of the left-side sealing plate 42 and the waist-shaped groove 331 of the support bar 32. Finally, coils and insulating paper are wound around the outer side of the outermost support bar 32 to complete the overall assembly of the transformer coil assembly. The design of the detachable sealing plate 42 not only facilitates step-by-step operations during assembly but also provides convenience for subsequent maintenance, allowing for individual disassembly and repair of the internal structure as needed.

[0062] After assembly, adjacent coils are physically isolated by support bars 32, forming a uniform insulating gap. This gap effectively prevents short circuits or breakdowns between coils through physical separation, ensuring the electrical safety of the transformer operation. Furthermore, this insulating gap, together with the straight slot 41 and curved slot 43, forms a connecting path, penetrating the internal space enclosed by the mounting plate 2 and the sealing plate 42. It then connects to the external environment through the through-hole 44 on the sealing plate 42, ultimately forming a complete heat dissipation channel. During operation, the cooling medium can flow smoothly along this channel, stably carrying away the heat generated by the coils, significantly improving heat dissipation efficiency and ensuring the transformer maintains a stable temperature during long-term operation, thereby enhancing the overall system reliability and service life.

[0063] It is worth noting that the transformer coil assembly with the aforementioned composite structure of wound positioning support bars also has the following advantages:

[0064] Advantage 1: In this embodiment, the support bars 32 are pre-fixed uniformly along the circumference of the annular plate 31. The annular plates 31 of different diameters can adapt to different winding requirements, ensuring the uniformity of the initial layout of the support bars 32 from the source. During operation, before installation, the annular frame 3441 is rotated, and the locking block 341 is driven to slide radially through the inclined groove 3443 of the hanging plate 3442, so that the locking block 341 is inserted into the slot 342 of each support bar 32, correcting the position of all support bars 32 and avoiding manual positioning errors. Subsequently, each layer of support bars 32 is precisely connected to the docking component 33 through the stepped groove 21, further ensuring that the spacing of each layer of support bars 32 is consistent, and ultimately preventing insulation deficiency and magnetic leakage problems caused by winding offset.

[0065] Advantage 2: In traditional processes, the support bar 32 needs to be glued to the insulating paper with insulating adhesive, and the adhesive needs to dry, which prolongs the winding cycle. This component replaces the adhesive with a mechanical locking docking structure. In this embodiment, after winding another layer of coil and insulating paper, it is only necessary to push the corresponding annular plate 31 so that the left end of the support bar 32 is locked with the stepped groove 21 of the left mounting plate 2 through the locking block 332, and then it can directly enter the next winding process (for example, after the innermost annular plate 31 is pushed, the support bar 32 is locked and does not need to wait for drying, and the second outermost coil can be wound immediately), completely saving the adhesive drying time and greatly improving assembly efficiency.

[0066] Thirdly, if the support bar 32 bends during the winding process, it will damage the flatness of the winding and affect the transformer performance. In this embodiment, when the innermost ring plate 31 is pushed, the innermost ring plate 31 will push the push block 343 to the left through the abutment block 353. The push block 343 drives the guide rod 354 and the moving block 355 to move synchronously. The moving block 355 pushes the support bar 351 to slide away from the geometric center through the chamfer, so that the support block 352 is tightly abutted against the outer surface of the inner insulating paper. At this time, the support bar 351 and the support block 352 form an "internal support structure", which greatly improves the bending resistance of the support bar 32, ensures that the support bar 32 remains straight during winding, and ensures the flatness of the winding.

[0067] Fourthly, in this embodiment, the cooling medium (air or insulating oil) can enter through the through hole 44 of the right sealing plate 42, flow through the gap between the curved groove 43 and the support bar 32 to the straight groove 41, and then be discharged through the through hole 44 of the left sealing plate 42, forming a complete heat dissipation path of "through hole 44 - curved groove 43 - gap between support bar 32 - straight groove 41 - through hole 44". This path can efficiently remove the heat generated by the coil operation, avoid heat accumulation that causes the insulating material (such as the insulating varnish of enameled wire) to age faster, and extend the service life of the transformer.

[0068] Fifthly, in this embodiment, the modular annular plate 31 and adjustable support bar 32 layout enhance adaptability. Structurally, the annular plate 31 adopts a "sliding nesting from the inside to the outside" design, which can increase or decrease the number of annular plates 31 according to the number of turns of the transformer winding. At the same time, the two-section inclined surface design of the locking block 341 and the annular frame 3441 structure of the synchronization module 344 support the synchronous correction of different numbers of support bars 32. During operation, if it is necessary to adapt to a large-size iron core, the number of large-diameter annular plates 31 can be increased. If it is necessary to adapt to a small winding, the number of annular plates 31 can be reduced and the position of the locking block 341 can be adjusted. There is no need to redesign the support bar 32 structure, which greatly improves the versatility of the component and reduces the production adaptation cost of transformers of different specifications.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A transformer coil assembly employing a composite structure of wound positioning support bars, characterized in that, include: An insulating sleeve (1) is symmetrically fixedly connected to a mounting plate (2) on the left and right sides. An isolation part (3) for isolating the winding and the iron core is connected to the mounting plate (2) on the right side. A ventilation part (4) for assisting the cooling of the winding is also provided on the insulating sleeve (1) and the mounting plate (2). The isolation part (3) includes an annular plate (31), and multiple annular plates (31) are uniformly slidably nested from the inside to the outside. Multiple support bars (32) are uniformly fixedly connected to the left end of the annular plate (31) along the circumferential direction. The support bars (32) on the multiple annular plates (31) correspond one to one. Among them, the left side of the two mounting plates (2) is evenly provided with stepped grooves (21) corresponding to the support bar (32) along the circumferential direction. The left end of the support bar (32) is provided with a docking component (33) that is compatible with the stepped groove (21). The right end of the mounting plate (2) on the right side is connected with an interlocking component (34) that restricts the installation order of the support bar (32). The support bar (32) is connected to a support component (35) to prevent it from bending.

2. A transformer coil assembly with a composite structure of wound positioning support bars according to claim 1, characterized in that: The docking assembly (33) includes a waist-shaped groove (331), and the left end of the support bar (32) is provided with a waist-shaped groove (331). The left end of the support bar (32) is symmetrically provided with chamfers and fixedly connected with a locking block (332).

3. A transformer coil assembly employing a composite structure of wound positioning support bars according to claim 1, characterized in that: The interlocking assembly (34) includes a locking block (341). The locking block (341) slides radially along the mounting plate (2) on the right side and is evenly arranged in a plurality of them on the right end of the mounting plate (2). Except for the innermost support bar (32), the other support bars (32) are provided with slots (342) and are slidably connected to the locking block (341) through the slots (342). The right end of each support bar (32) is slidably connected to a push block (343). The mounting plate (2) on the right side is connected to a synchronization module (344) that keeps the plurality of locking blocks (341) sliding synchronously.

4. A transformer coil assembly employing a composite structure of wound positioning support bars according to claim 3, characterized in that: The locking block (341) adopts a two-section design. The width of the end of the locking block (341) near the geometric center of the mounting plate (2) on the right side is smaller than the width of the end of the locking block (341) away from the mounting plate (2) on the right side. The two sections of the locking block (341) are smoothly transitioned by chamfering.

5. A transformer coil assembly employing a composite structure of wound positioning support bars according to claim 3, characterized in that: The right end face of the narrower section of the locking block (341) is designed with a slope, and the left end face of the push block (343) is also designed with the same slope as the locking block (341), and the slope length of the push block (343) is greater than the slope length of the locking block (341).

6. A transformer coil assembly employing a composite structure of wound positioning support bars according to claim 3, characterized in that: The synchronization module (344) includes a ring frame (3441), which is damped and rotatably connected to the mounting plate (2) on the right side. The inner circumference of the ring frame (3441) is uniformly fixed with a hanging plate (3442). The hanging plate (3442) is provided with a slanted groove (3443). One end of the locking block (341) away from the geometric center of the mounting plate (2) on the right side is slidably connected to the slanted groove (3443) through a cylindrical block (3444).

7. A transformer coil assembly employing a composite structure of wound positioning support bars according to claim 3, characterized in that: The support component (35) includes a support bar (351), which is slidably connected in the support bar (32). The lower end of the support bar (351) is uniformly fixedly connected to a support block (352). The right end of the push block (343) is fixedly connected to a stop block (353). The left end of the push block (343) is symmetrically fixedly connected to a guide rod (354). The left end of the guide rod (354) slides through the support bar (32) and is fixedly connected to a moving block (355) through a reset spring. The right end of the support bar (351) and the left end of the moving block (355) adopt a chamfered design that cooperates with each other.

8. A transformer coil assembly with a composite structure of wound positioning support bars according to claim 1, characterized in that: The ventilation section (4) includes a straight groove (41). The outer circumferential surface of the insulating sleeve (1) is uniformly provided with a straight groove (41) extending into and communicating with the mounting plate (2). The end of the mounting plate (2) away from the insulating sleeve (1) is detachably connected to a sealing plate (42). The center of the sealing plate (42) on the right side is provided with a slot to avoid interference with the annular plate (31). The mounting plate (2) is uniformly provided with curved grooves (43) from the inside to the outside along the circumferential direction, which are aligned with the stepped groove (21). Both sealing plates (42) are uniformly provided with through holes (44).

9. A transformer coil assembly employing a composite structure of wound positioning support bars according to claim 2, characterized in that: The right end face of the left sealing plate (42) is uniformly fixed with multiple limiting strips (333) that are adapted to the waist-shaped groove (331) along the circumferential direction. The right end of the limiting strip (333) is chamfered.

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