A transformer coil using a rotating positioning pin array structure

Abstract

The application relates to the technical field of transformer coils and discloses a transformer coil adopting a rotary positioning pin array structure, which comprises an interlayer insulation cylinder, two coil winding bodies are wound on the outer wall of the interlayer insulation cylinder, a plurality of partition bent plates are installed in the middle of the outer wall of the interlayer insulation cylinder, and adjusting plates are symmetrically and slidably arranged on the outer wall of the interlayer insulation cylinder. The transformer coil adopting the rotary positioning pin array structure can effectively solve the problems in the prior art that the segmented transformer coil is mostly dependent on single or a small number of limiting components, it is difficult to cope with the deviation of alignment during assembly or the thermal expansion and cold contraction during operation, the coil segments move along the axial direction or the interlayer gap is uneven, it is difficult to resist the radial deviation caused by the poor rigidity difference of the material itself or long-term operation vibration in the radial direction, the coil interlayer is dislocated, the local insulation layer is extruded and damaged, and then the insulation performance and short-circuit resistance of the transformer are affected.

Description

Technical Field

[0001] This invention relates to the field of transformer coil technology, and more specifically to a transformer coil employing a rotating positioning pin array structure. Background Technology

[0002] As a core component of power transformers, the manufacturing precision and assembly reliability of transformer coils directly affect the transformer's electrical performance, operating efficiency, and service life. Transformer coil winding methods can be divided into layered coils and pancake coils. Segmented coils are an important structural form, usually classified as a subtype of layered or pancake coils. Their core characteristic is dividing the coil into multiple independent "segments" or "line segments," which are isolated by insulating materials and connected by wires when necessary to form a complete coil. This design is mainly used to optimize electric field distribution, improve heat dissipation, or adapt to special voltage or current requirements. However, existing segmented transformer coils rely primarily on fixed tooling fixtures or single guide posts for positioning during winding and assembly to ensure the concentricity between coil layers and their relative position to the iron core.

[0003] In response to this, this application designs a transformer coil with a rotating positioning pin array structure. Existing segmented transformer coils rely on a single or a few limiting components during assembly and operation, which can only roughly constrain the coil in one of the axial or radial directions. This makes it difficult to cope with the axial movement or uneven interlayer gaps of the coil segments caused by misalignment during assembly or thermal expansion and contraction during operation. In the radial direction, it is difficult to resist the radial displacement caused by the rigidity difference of the material itself or long-term operating vibration, which leads to interlayer misalignment of the coil and local compression damage of the insulation layer, thereby affecting the insulation performance and short-circuit withstand capability of the transformer. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a transformer coil employing a rotating positioning pin array structure. This effectively solves the problems in existing technologies where segmented transformer coils rely on single or a few limiting components, making it difficult to cope with misalignment during assembly or thermal expansion and contraction during operation. This results in coil segment movement along the axial direction or uneven interlayer gaps; and in the radial direction, it is difficult to resist radial displacement caused by differences in material rigidity or long-term operational vibration, leading to coil layer misalignment, local compression damage to the insulation layer, and consequently affecting the transformer's insulation performance and short-circuit withstand capability.

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

[0006] This invention provides a transformer coil employing a rotating positioning pin array structure, comprising:

[0007] Interlayer insulation cylinder, with two coil winding bodies wound on the outer wall of the interlayer insulation cylinder, several partition bending plates installed in the middle of the outer wall of the interlayer insulation cylinder, and adjusting plates symmetrically slidably sleeved on the outer wall of the interlayer insulation cylinder. The interlayer insulation cylinder and the adjusting plates on the left and right sides are respectively provided with axial positioning parts, and the partition bending plates are provided with radial positioning parts.

[0008] The axial positioning part includes a receiving groove opened on the side wall of the interlayer insulation cylinder. The side wall of the interlayer insulation cylinder is also provided with several guide sliding holes connected to the receiving groove. Each of the several guide sliding holes has a sliding plate fixedly connected to the corresponding adjustment plate. A connecting ring is slidably installed on the inner wall of the receiving groove. Several mating plates are installed on the end of the connecting ring facing the partition plate. The interlayer insulation cylinder and the several mating plates are respectively provided with positioning posts.

[0009] The radial positioning part includes extension seats installed on the outer walls of the left and right sides of the vertical section of the partition bend plate. The upper end of the horizontal section of the partition bend plate is provided with an installation groove. A cover is installed on the upper side of the inner wall of the installation groove. An alignment plate is slidably installed on the lower side of the inner wall of the installation groove. An adjustment group is provided on the cover and the two adjacent partition bend plates.

[0010] Furthermore, the positioning assembly includes a receiving groove located on the mating plate facing the middle of the interlayer insulation cylinder. The receiving groove has a convex design. A ratchet is slidably installed on the inner wall of the receiving groove facing the middle of the interlayer insulation cylinder via a tension spring. A lead screw is rotatably installed on the inner wall of the left and right ends of the receiving groove away from the middle of the interlayer insulation cylinder. The lead screw is threadedly connected to a sliding plate that is slidably connected to the inner wall of the receiving groove. The opposite ends of the ratchet and the sliding plate are both wedge-shaped structures.

[0011] Furthermore, the positioning assembly also includes clearance holes located at both ends of the mating plate. An adjusting rod is rotatably installed on the inner wall of the end of the receiving groove facing the partition plate. The adjusting rod slides through the lead screw on the outer wall of the receiving groove via mating slides on both sides. An mounting seat is installed on the inner wall of the receiving groove away from the partition plate. The mounting seat is rotatably sleeved on the outer wall of the adjusting rod. A ratchet limiter is rotatably installed on the inner wall of the receiving groove corresponding to the ratchet rack.

[0012] Furthermore, the adjustment assembly includes several insert rods installed on the two adjacent partition bends at the end of the alignment plate away from the cover. The left end of the horizontal section of the partition bend has a receiving hole connected to the mounting groove. An incomplete gear is symmetrically installed on the inner wall of the receiving hole facing the alignment plate.

[0013] Furthermore, the adjustment assembly also includes an extension rod installed on the outer wall of each pair of adjacent incomplete gears on opposite sides. A radial positioning pin is installed at the end of the extension rod away from the incomplete gear. Each pair of adjacent incomplete gears meshes with each other, and two slots are evenly distributed in a circle at the upper end of the incomplete gear corresponding to the insertion rod.

[0014] Furthermore, symmetrical inner support groups are arranged on the inner wall of the interlayer insulation cylinder. The inner support groups include several mating grooves opened on the inner wall of the interlayer insulation cylinder. The several mating grooves are evenly distributed in a rectangular shape, and support plates are slidably installed on the inner wall of the mating grooves by compression springs.

[0015] Furthermore, extension seats are symmetrically installed on both the front and rear sides of the end of the adjusting plate near the partition bend plate. Each extension seat has an installation cavity at the end facing the corresponding coil winding body. A limit plate is slidably installed on the inner wall of the installation cavity by a compression spring. Several radial positioning pins are installed on both the upper and lower sides of the end of the adjusting plate near the partition bend plate.

[0016] Furthermore, axial positioning pins are installed at the ends of several sliding plates away from the interlayer insulation cylinder, and several axial positioning pins are installed on the outer wall of the interlayer insulation cylinder on both the left and right sides of the partition bend plate.

[0017] Furthermore, the front and rear sides of the upper end of the alignment plate are connected to two adjacent covers by compression springs.

[0018] The technical solution provided by this invention has the following advantages compared with the prior art:

[0019] This invention provides a transformer coil with a rotary positioning pin array structure. During the axial positioning adjustment stage, the left and right adjustment plates are pushed sequentially, causing them to slide along the outer wall of the interlayer insulation cylinder towards the partition bend plate until the axial positioning pins abut against the end of the coil winding body. During this process, the mating plate will also drive the corresponding ratchet to move synchronously towards the partition bend plate, and the ratchet will lock the position of the ratchet. At this time, the multiple axial positioning pins on the adjustment plate and the axial positioning pins on the interlayer insulation cylinder will jointly limit the axial position of the coil winding body. By adjusting the position of the ratchet and cooperating with the unidirectional locking of the ratchet limiting component, the axial positioning requirements of coil winding bodies of different lengths can be adapted. The adjustment synchronization is strong and the locking is reliable, avoiding the problem that the coil winding body is prone to axial movement or uneven interlayer gaps due to alignment deviations during subsequent assembly or thermal expansion and contraction during operation.

[0020] During the radial positioning adjustment stage, multiple radial positioning pins will be tightly fitted against the outer wall of the coil winding body to radially limit its movement. At the same time, multiple limiting plates will also be tightly fitted against the outer wall of the coil winding body. After the left and right adjustment plates are axially positioned, the multiple radial positioning pins and limiting plates on the adjustment plates will also be tightly fitted against the outer wall of the coil winding body, further strengthening the radial limiting of the coil winding body. This achieves the effect of multiple radial positioning pins and limiting plates jointly limiting the radial movement of the coil winding body, avoiding radial displacement of the coil winding body due to material rigidity differences or long-term operating vibration, which could lead to interlayer misalignment of the coil, local compression and damage of the insulation layer, and thus affect the insulation performance and short-circuit withstand capability of the transformer. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a partial three-dimensional cross-section in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a multi-angle three-dimensional partial cross-section in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional separation of the interlayer insulating cylinder and the support plate in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the three-dimensional separation of the adjusting plate and the axial positioning part in an embodiment of the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the axial positioning part separated in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of a partial three-dimensional cross-section of the positioning group in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the three-dimensional separation of the radial positioning part in an embodiment of the present invention;

[0030] Figure 9 For the present invention Figure 8 A magnified view of point X in the middle.

[0031] The labels in the diagram represent: 1. Interlayer insulation cylinder; 11. Support plate; 2. Coil winding body; 3. Partition bend plate; 4. Adjusting plate; 5. Axial positioning part; 51. Sliding plate; 511. Axial positioning pin; 52. Connecting ring; 53. Mating plate; 54. Positioning group; 541. Ratchet; 542. Lead screw; 543. Clamping slide plate; 544. Adjusting rod; 545. Mounting seat; 546. Ratchet limiter; 6. Radial positioning part; 61. Extension seat; 611. Limiting plate; 62. Cover; 63. Alignment plate; 64. Adjusting group; 641. Insert rod; 642. Incomplete gear; 643. Extension rod; 644. Radial positioning pin. Detailed Implementation

[0032] 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.

[0033] The present invention will be further described below with reference to embodiments.

[0034] Example:

[0035] Please see Figures 1-9 The present invention provides a technical solution: a transformer coil employing a rotating positioning pin array structure, comprising:

[0036] Interlayer insulation cylinder 1, two coil winding bodies 2 are wound on the outer wall of the interlayer insulation cylinder 1, and several partition plates 3 are installed in the middle of the outer wall of the interlayer insulation cylinder 1. The partition plates 3 are evenly distributed in a rectangular shape. Adjusting plates 4 are symmetrically slidably sleeved on the outer wall of the interlayer insulation cylinder 1. Axial positioning parts 5 are provided on the interlayer insulation cylinder 1 and the adjusting plates 4 on the left and right sides respectively. Radial positioning parts 6 are provided on the partition plates 3.

[0037] The axial positioning part 5 includes a receiving groove on the side wall of the interlayer insulation cylinder 1. The side wall of the interlayer insulation cylinder 1 is also provided with a number of guide sliding holes connected to the receiving groove. The number of guide sliding holes are evenly distributed in a rectangular shape, and a sliding plate 51 fixedly connected to the corresponding adjusting plate 4 is slidably installed on the inner wall of each of the guide sliding holes. A connecting ring 52 is slidably installed on the inner wall of the receiving groove. A number of mating plates 53 are installed on the end of the connecting ring 52 facing the partition bent plate 3. The number of mating plates 53 are evenly distributed in a rectangular shape. A positioning group 54 is provided on the interlayer insulation cylinder 1 and the number of mating plates 53 respectively.

[0038] The radial positioning part 6 includes an extension seat 61 installed on the outer walls of the left and right sides of the vertical section of the partition plate 3. The upper end of the horizontal section of the partition plate 3 is provided with an installation groove. A cover 62 is installed on the upper side of the inner wall of the installation groove. An alignment plate 63 is slidably installed on the lower side of the inner wall of the installation groove. An adjustment group 64 is provided on the cover 62 and the two adjacent partition plates 3.

[0039] The positioning assembly 54 includes a storage groove located on the mating plate 53 facing the middle end of the interlayer insulation cylinder 1. The storage groove has a convex design. A ratchet rack 541 is slidably installed on the inner wall of the storage groove facing the middle of the interlayer insulation cylinder 1 via a tension spring. A lead screw 542 is rotatably installed on the inner wall of the left and right ends of the storage groove away from the middle of the interlayer insulation cylinder 1. The lead screw 542 is threadedly connected to a sliding plate 543 slidably connected to the inner wall of the storage groove. The opposite ends of the ratchet rack 541 and the sliding plate 543 are both wedge-shaped structures.

[0040] The positioning assembly 54 also includes clearance holes located at both ends of the mating plate 53. An adjusting rod 544 is rotatably installed on the inner wall of the end of the receiving groove facing the partition plate 3. The adjusting rod 544 slides through the lead screw 542 on the outer wall of the receiving groove via mating slides on both sides. An mounting seat 545 is installed on the inner wall of the receiving groove away from the partition plate 3. The mounting seat 545 is rotatably sleeved on the outer wall of the adjusting rod 544. A ratchet limiting member 546 is rotatably installed on the inner wall of the receiving groove corresponding to the ratchet rack 541. The ratchet limiting member 546 consists of a ratchet, a pawl, and a stop.

[0041] The adjustment group 64 includes several rods 641 installed on the two adjacent partition plates 3 at the end of the alignment plate 63 away from the cover 62. The rods 641 are evenly distributed in a rectangle. The left end of the horizontal section of the partition plate 3 is provided with a storage hole connected to the mounting groove. An incomplete gear 642 is symmetrically installed on the inner wall of the end of the storage hole facing the alignment plate 63.

[0042] The adjustment group 64 also includes an extension rod 643 installed on the outer wall of each pair of adjacent incomplete gears 642 on opposite sides. A radial positioning pin 644 is installed at the end of the extension rod 643 away from the incomplete gear 642. Each pair of adjacent incomplete gears 642 mesh with each other, and two slots are opened on the upper end of the incomplete gear 642 corresponding to the insertion rod 641, which are evenly distributed in a circle.

[0043] The inner wall of the interlayer insulation cylinder 1 is symmetrically provided with internal support groups. The internal support groups include several matching grooves opened on the inner wall of the interlayer insulation cylinder 1. The several matching grooves are evenly distributed in a rectangular shape, and a support plate 11 is slidably installed on the inner wall of the matching groove by compression springs. The end of the support plate 11 away from the interlayer insulation cylinder 1 is a wedge-shaped structure.

[0044] The adjusting plate 4 has extension seats 61 symmetrically installed on both the front and rear sides of the end near the partition plate 3. Each extension seat 61 has an installation cavity at the end facing the corresponding coil winding body 2. A limit plate 611 is slidably installed on the inner wall of the installation cavity by a compression spring. Several radial positioning pins 644 are installed on both the front and rear sides of the adjusting plate 4 near the partition plate 3. The several radial positioning pins 644 are evenly distributed from front to back.

[0045] Axial positioning pins 511 are installed on the ends of several sliding plates 51 away from the interlayer insulation cylinder 1. Several axial positioning pins 511 are installed on the outer wall of the interlayer insulation cylinder 1 on both the left and right sides of the partition bending plate 3. The several axial positioning pins 511 are evenly distributed in a rectangle, and the several axial positioning pins 511 located on the front and rear sides are respectively fixedly connected to the corresponding extension seats 61.

[0046] The front and rear sides of the upper end of the alignment plate 63 are connected to the two adjacent covers 62 by compression springs.

[0047] In practice:

[0048] First, the two left and right adjustment plates 4 and the two left and right alignment plates 63 in this application are initially far apart from each other. At this time, multiple pressing slide plates 543 are respectively located on the side of the corresponding lead screw 542 near the partition curved plate 3, and respectively push the corresponding ratchet rack 541 out of the storage groove. At this time, the ratchet rack 541 is engaged with the ratchet in the corresponding ratchet limiting member 546. It should be noted that under the cooperation of the pawl and the stop in the ratchet limiting member 546, the ratchet can only rotate in one direction, so that the ratchet rack 541 in the extended state can only move towards the partition curved plate 3, and cannot move in the opposite direction after moving to lock the position. The radial positioning pin 644 and the axial positioning pin 511 are both in the waiting-to-be-limited state. The radial positioning pin 644 on the partition curved plate 3 is initially located in the corresponding storage hole, and the alignment plate 63 is initially attached to the corresponding multiple incomplete gears 642. The support plate 11 of the inner support group maintains the initial support state under the action of the compression spring.

[0049] During the winding stage of the coil winding body 2, the workers first place the interlayer insulation cylinder 1 on the external winding machine and fix it in place. After clamping, the external winding machine performs coil winding work until a coil winding body 2 is wound on both the left and right sides of the partition bend plate 3 on the interlayer insulation cylinder 1. The left and right coil winding bodies 2 are wound with the multiple axial positioning pins 511 on the left and right sides of the partition bend plate 3 as the starting reference, so as to initially position the coil winding bodies 2. When the winding starts, the multiple limiting plates 611 will be squeezed by the coil wire in turn and retract into the corresponding installation cavity to avoid it. After the coil winding is completed, the multiple limiting plates 611 will extend out of the corresponding installation cavity in turn under the action of the compression spring.

[0050] During the axial positioning adjustment stage, based on the axial dimensions of the coil winding body 2, the operator sequentially pushes the left and right adjustment plates 4, causing them to slide along the outer wall of the interlayer insulation cylinder 1 towards the partition bend plate 3. The adjustment plates 4, through multiple sliding plates 51, collectively drive the corresponding connecting rings 52 to slide synchronously towards the partition bend plate 3. The connecting rings 52, through multiple mating plates 53, drive the corresponding axial positioning pins 511 to move synchronously towards the partition bend plate 3 until the axial positioning pins 511 are pressed against the end of the coil winding body 2. During this period, the mating plates 53 also drive the corresponding ratchet racks 541 to move synchronously towards the partition bend plate 3. The ratchet racks 541, under their action, will... One-way rotation compensation is performed, and after the ratchet 541 stops, the position of the ratchet 541 is locked again. At this time, the multiple axial positioning pins 511 on the adjusting plate 4 and the axial positioning pins 511 on the interlayer insulation cylinder 1 will jointly limit the axial position of the coil winding body 2. By adjusting the position of the ratchet 541 and cooperating with the one-way locking of the ratchet limiter 546, the axial positioning requirements of coil winding bodies 2 of different lengths can be adapted. The adjustment synchronization is strong and the locking is reliable, avoiding the problem that the coil winding body 2 is prone to axial movement or uneven interlayer gap due to the alignment deviation during subsequent assembly or thermal expansion and contraction during operation.

[0051] During the radial positioning adjustment stage, after axially positioning the coil winding body 2, the operator first pulls the upper and lower alignment plates 63 in sequence, causing the alignment plates 63 to slide along the mounting groove towards the cover 62. Since the alignment plates 63 are initially attached to the corresponding multiple incomplete gears 642, and the multiple insert rods 641 are initially inserted into the slots on the corresponding incomplete gears 642, the alignment plates 63 will drive the multiple insert rods 641 to move synchronously towards the cover 62, causing them to exit their corresponding slots. Then, the operator sequentially moves the multiple radial positioning pins 644 on one side, causing them to rotate 90 degrees around the corresponding incomplete gear 642, so that the pins are aligned with the mounting grooves on the cover 62. Under the meshing action of the complete gear 642, two adjacent incomplete gears 642 will rotate 90 degrees synchronously in opposite directions, thereby achieving the effect that multiple radial positioning pins 644 on the left and right sides will rotate 90 degrees synchronously in opposite directions. Then, the operator releases the alignment plate 63. Under the action of the compression spring, the alignment plate 63 will slide along the mounting groove towards the outer wall of the interlayer insulation cylinder 1 until the alignment plate 63 is once again attached to the corresponding multiple incomplete gears 642 and returns to its original position. At this time, multiple insert rods 641 will be inserted into the slots on the corresponding incomplete gears 642 again, thereby achieving the effect of locking the position of multiple radial positioning pins 644.

[0052] When multiple radial positioning pins 644 extend 90 degrees toward the coil winding body 2, they will fit tightly against the outer wall of the coil winding body 2, providing radial restraint. Simultaneously, multiple limiting plates 611, after extending sequentially into their respective mounting cavities during the coil winding stage, will also fit tightly against the outer wall of the coil winding body 2. Furthermore, when the left and right adjusting plates 4 are axially adjusted, the multiple radial positioning pins 644 and limiting plates 611 on the adjusting plates 4 will also fit tightly against the outer wall of the coil winding body 2, further strengthening the radial restraint of the coil winding body 2. This achieves the effect of multiple radial positioning pins 644 and limiting plates 611 jointly providing radial restraint to the coil winding body 2, preventing radial displacement of the coil winding body 2 due to material rigidity differences or long-term operational vibration, which could lead to interlayer misalignment of the coil, localized compression and damage to the insulation layer, and consequently affect the transformer's insulation performance and short-circuit withstand capability.

[0053] During the assembly auxiliary positioning stage, after completing the above positioning adjustment, the coil winding body 2 is stably assembled through the axial positioning pin 511 and the radial positioning pin 644 to form a complete high-voltage coil. The staff checks the fit between each positioning component and the coil winding body 2. After confirming that there is no looseness or offset, the subsequent insulation treatment and overall transformer assembly work can be carried out. It should be noted that when assembling the transformer, the pre-prepared low-voltage coil should first be placed on the outside of the iron core column to ensure that the gap with the iron core is uniform. Then, the high-voltage coil in this application is placed on the outside of the low-voltage coil. During this period, multiple support plates 11 are always in contact with the outer wall of the low-voltage coil under the action of compression springs to offset the external pressure and further prevent the low-voltage coil from radially displacing. It also facilitates the subsequent insertion of the support bar into the gap between the interlayer insulation cylinder 1 and the low-voltage coil.

[0054] It should be noted that this application adopts a positioning method of multi-point axial limiting plus multi-point radial limiting to avoid the problem of low constraint force due to force concentration of a single or a few limiting components. With the support plate 11, it can achieve bidirectional positioning effect for low voltage coil and high voltage coil. It avoids the problem that the large cumulative tolerance during the assembly of multi-segment coils affects the concentricity of the windings, which leads to a significant increase in electric field intensity at the gap that exceeds the withstand strength of the insulating medium, thereby causing partial discharge, insulation material breakdown, and ultimately phase-to-phase short circuit or short circuit to ground fault.

[0055] During the replacement and maintenance phase, it should be noted that the mounting base 545 in this application is detachably mounted on the interlayer insulation cylinder 1. First, the operator uses an adjustment tool to sequentially control the rotation of multiple adjusting rods 544 on both sides. The adjusting rods 544, in conjunction with a sliding bar, drive multiple lead screws 542 to rotate synchronously, causing the pressing plate 543 to slide along the receiving groove away from the partition bend plate 3. Until, under the action of the tension spring, multiple ratchet racks 541 on both sides retract into their corresponding receiving grooves. At this point, the wedge-shaped end face of the pressing plate 543 will fit against the wedge-shaped end face of the ratchet rack 541, and the retracted ratchet rack 541 will disengage from the ratchet's position locking function and can then... By moving left and right, workers can disassemble multiple mounting seats 545 in sequence. Then, they can continue to pull the two adjusting plates 4 on the left and right, causing them to slide along the outer wall of the interlayer insulation cylinder 1 away from the partition bend plate 3. The adjusting plates 4, through multiple sliding plates 51, drive the corresponding connecting rings 52 to slide synchronously away from the partition bend plate 3. The connecting rings 52, through multiple mating plates 53, drive the corresponding axial positioning pins 511 to move synchronously away from the partition bend plate 3 until the workers remove the two adjusting plates 4 on the left and right and the connecting rings 52 for modular replacement. This process is efficient and effectively reduces the disassembly and maintenance time of the axial positioning pins 511 and radial positioning pins 644.

[0056] In summary, this application has the following advantages:

[0057] Advantage 1: During the axial positioning adjustment stage, the operator pushes the two adjustment plates 4 sequentially, causing them to slide along the outer wall of the interlayer insulation cylinder 1 towards the partition bend plate 3 until the axial positioning pin 511 abuts against the end of the coil winding body 2. During this process, the mating plate 53 will also drive the corresponding ratchet 541 to move synchronously towards the partition bend plate 3. The ratchet will lock the position of the ratchet 541. At this time, the multiple axial positioning pins 511 on the adjustment plate 4 and the axial positioning pins 511 on the interlayer insulation cylinder 1 will jointly limit the axial positioning of the coil winding body 2. Through the position adjustment of the ratchet 541, combined with the one-way locking of the ratchet limiting part 546, the axial positioning requirements of coil winding bodies 2 of different lengths can be adapted. The adjustment synchronization is strong and the locking is reliable, avoiding the problem that the coil winding body 2 is prone to axial movement or uneven interlayer gaps due to alignment deviations during subsequent assembly or thermal expansion and contraction during operation.

[0058] Secondly, during the radial positioning adjustment stage, the operator pulls the upper and lower alignment plates 63 sequentially, causing the alignment plates 63 to slide along the mounting groove towards the cover 62. Then, the operator moves the multiple radial positioning pins 644 on one side sequentially, causing them to rotate 90 degrees around the corresponding incomplete gear 642. Adjacent incomplete gears 642 will rotate 90 degrees synchronously in opposite directions, thus achieving the effect that the multiple radial positioning pins 644 on both the left and right sides rotate 90 degrees synchronously in opposite directions. Then, the operator releases the alignment plates 63, and under the action of the compression spring, the alignment plates 63 will slide along the mounting groove towards the outer wall of the interlayer insulation cylinder 1 until the alignment plates 63 are once again attached to the corresponding multiple incomplete gears 642 and return to their original positions. At this time, the multiple insert rods 641 will be inserted into the slots on the corresponding incomplete gears 642 again, thus achieving the effect of locking the position of the multiple radial positioning pins 644.

[0059] Thirdly, multiple radial positioning pins 644 will be tightly fitted to the outer wall of the coil winding body 2 to radially limit its movement. At the same time, multiple limiting plates 611 will also be tightly fitted to the outer wall of the coil winding body 2. When the left and right adjusting plates 4 are axially positioned, the multiple radial positioning pins 644 and limiting plates 611 on the adjusting plates 4 will also be tightly fitted to the outer wall of the coil winding body 2, further strengthening the radial limiting of the coil winding body 2. This achieves the effect of multiple radial positioning pins 644 and limiting plates 611 jointly limiting the coil winding body 2 radially, avoiding radial displacement of the coil winding body 2 due to material rigidity differences or long-term operating vibration, which could lead to interlayer misalignment of the coil and local compression damage of the insulation layer, thereby affecting the insulation performance and short-circuit withstand capability of the transformer.

[0060] Fourthly, during the assembly auxiliary positioning stage, the coil winding body 2 is stably assembled by the axial positioning pin 511 and the radial positioning pin 644 to form a complete high-voltage coil. When assembling the transformer, the pre-prepared low-voltage coil needs to be placed on the outside of the iron core column to ensure that the gap with the iron core is uniform. Then, the high-voltage coil in this application is placed on the outside of the low-voltage coil. During this period, multiple support plates 11 are always in contact with the outer wall of the low-voltage coil under the action of compression springs to offset the external pressure and further prevent the low-voltage coil from radially displacing. It also facilitates the subsequent insertion of the support bar into the gap between the interlayer insulation cylinder 1 and the low-voltage coil.

[0061] Fifthly, this application adopts a positioning method of multi-point axial limiting and multi-point radial limiting, which avoids the problem of low constraint force due to force concentration of a single or a few limiting components. With the support plate 11, it can achieve bidirectional positioning effect for low-voltage coils and high-voltage coils. It avoids the problem that the large cumulative tolerance during the assembly of multi-segment coils affects the concentricity of the windings, which leads to a significant increase in the electric field intensity at the gap that exceeds the withstand strength of the insulating medium, thereby causing partial discharge, insulation material breakdown, and ultimately leading to phase-to-phase short circuit or short circuit to ground faults.

[0062] Advantage six: During the replacement and maintenance phase, the staff first uses adjustment tools to control the rotation of multiple adjustment rods 544 on the left and right sides in sequence until multiple ratchet racks 541 on the left and right sides retract into their corresponding storage slots. Then, the staff can disassemble multiple mounting seats 545 in sequence. After that, the staff continues to pull the two adjustment plates 4 on the left and right sides until the staff removes the two adjustment plates 4 and the connecting ring 52 for modular replacement. This results in high assembly efficiency and effectively reduces the disassembly and maintenance time of the axial positioning pin 511 and the radial positioning pin 644.

[0063] 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 employing a rotating positioning pin array structure, characterized in that, include: Interlayer insulation cylinder (1), two coil winding bodies (2) are wound on the outer wall of the interlayer insulation cylinder (1), several partition plates (3) are installed in the middle of the outer wall of the interlayer insulation cylinder (1), and adjustment plates (4) are symmetrically slidably sleeved on the outer wall of the interlayer insulation cylinder (1). Axial positioning parts (5) are provided on the interlayer insulation cylinder (1) and the adjustment plates (4) on the left and right sides respectively, and radial positioning parts (6) are provided on the partition plates (3). The axial positioning part (5) includes a receiving groove on the side wall of the interlayer insulation cylinder (1). The side wall of the interlayer insulation cylinder (1) is also provided with several guide sliding holes connected to the receiving groove. The inner walls of the several guide sliding holes are all slidably installed with sliding plates (51) fixedly connected to the corresponding adjusting plates (4). A connecting ring (52) is slidably installed on the inner wall of the receiving groove. Several mating plates (53) are installed on one end of the connecting ring (52) facing the partition bending plate (3). A positioning group (54) is provided on the interlayer insulation cylinder (1) and the several mating plates (53). The radial positioning part (6) includes an extension seat (61) installed on the outer walls of the left and right sides of the vertical section of the partition plate (3). The upper end of the horizontal section of the partition plate (3) is provided with an installation groove. A cover (62) is installed on the upper side of the inner wall of the installation groove. An alignment plate (63) is slidably installed on the lower side of the inner wall of the installation groove. An adjustment group (64) is provided on the cover (62) and the two adjacent partition plates (3). The positioning group (54) includes a storage groove located on the mating plate (53) facing the middle end of the interlayer insulation cylinder (1). The storage groove is convex in shape. A ratchet (541) is slidably installed on the inner wall of the storage groove facing the middle of the interlayer insulation cylinder (1) by a tension spring. A screw (542) is rotatably installed on the inner wall of the left and right ends of the storage groove away from the middle of the interlayer insulation cylinder (1). The screw (542) is connected by a threaded connection to a sliding plate (543) slidably connected to the inner wall of the storage groove. The opposite ends of the ratchet (541) and the sliding plate (543) are wedge-shaped structures. The positioning group (54) also includes clearance holes located at both ends of the mating plate (53). An adjusting rod (544) is rotatably installed on the inner wall of the end of the receiving groove facing the partition plate (3). The adjusting rod (544) slides through the lead screw (542) on the outer wall of the outer wall of the adjusting rod (544) via mating slide bars on both sides. An mounting seat (545) is installed on the inner wall of the receiving groove away from the partition plate (3). The mounting seat (545) is rotatably sleeved on the outer wall of the adjusting rod (544). A ratchet limiter (546) is rotatably installed on the inner wall of the receiving groove corresponding to the ratchet rack (541).

2. A transformer coil with a rotating positioning pin array structure according to claim 1, characterized in that: The adjustment group (64) includes several insert rods (641) installed on the side of the alignment plate (63) away from the cover (62) corresponding to two adjacent partition plates (3). The left end of the horizontal section of the partition plate (3) is provided with a storage hole connected to the mounting groove. An incomplete gear (642) is symmetrically installed on the inner wall of the end of the storage hole facing the alignment plate (63).

3. A transformer coil employing a rotating positioning pin array structure according to claim 2, characterized in that: The adjustment group (64) also includes an extension rod (643) installed on the opposite outer wall of each of the two adjacent incomplete gears (642). A radial positioning pin (644) is installed at the end of the extension rod (643) away from the incomplete gear (642). Each of the two adjacent incomplete gears (642) meshes with each other, and two slots are opened on the upper end of the incomplete gear (642) corresponding to the insertion rod (641) in a circumferentially evenly distributed manner.

4. A transformer coil with a rotating positioning pin array structure according to claim 1, characterized in that: The inner wall of the interlayer insulating cylinder (1) is symmetrically provided with an inner support group. The inner support group includes several matching grooves opened on the inner wall of the interlayer insulating cylinder (1). The several matching grooves are evenly distributed in a rectangular shape, and a support plate (11) is slidably installed on the inner wall of the matching groove by a compression spring.

5. A transformer coil with a rotating positioning pin array structure according to claim 1, characterized in that: The adjustment plate (4) has extension seats (61) symmetrically installed on both the front and rear sides of the end near the partition plate (3). Each extension seat (61) has an installation cavity at the end facing the corresponding coil winding body (2). A limit plate (611) is slidably installed on the inner wall of the installation cavity by a compression spring. Several radial positioning pins (644) are installed on both the upper and lower sides of the end of the adjustment plate (4) near the partition plate (3).

6. A transformer coil with a rotating positioning pin array structure according to claim 1, characterized in that: Axial positioning pins (511) are installed on one end of each sliding plate (51) away from the interlayer insulating cylinder (1), and a number of axial positioning pins (511) are installed on the outer wall of the interlayer insulating cylinder (1) on both the left and right sides of the partition bending plate (3).

7. A transformer coil employing a rotating positioning pin array structure according to claim 1, characterized in that: The upper end of the alignment plate (63) is connected to two adjacent covers (62) on both the front and rear sides by compression springs.

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