Transformer coil adopting rotary positioning pin array structure

Abstract

The invention relates to the technical field of transformer coils, and discloses a transformer coil adopting a rotary positioning pin array structure, which comprises an interlayer insulating cylinder, a left coil winding body and a right coil winding body wound on the outer wall of the interlayer insulating cylinder, and a plurality of partition bent plates mounted in the middle of the outer wall of the interlayer insulating cylinder, adjusting plates slidably sleeve the outer wall of the interlayer insulating cylinder in a bilateral symmetry manner. The transformer coil adopting the rotary positioning pin array structure can effectively solve the problems that in the prior art, a sectional type transformer coil mostly depends on a single or few limiting parts, so that movement of coil sections in the axis direction or uneven interlayer gaps due to alignment deviation during assembly or thermal expansion and cold contraction during operation is difficult to deal with; the radial direction is difficult to resist the rigidity difference of materials or radial deviation caused by long-term operation vibration, so that dislocation between coil layers and local extrusion damage of an insulating layer are caused, and the insulating property and the short-circuit resistance of the transformer are further influenced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer coil, and particularly relates to a transformer coil adopting a rotary positioning pin array structure. BACKGROUND

[0002] As a core component of power transformers, the manufacturing precision and assembly reliability of transformer coils directly affect the electrical performance, operating efficiency and service life of transformers. The winding method of transformer coils can be divided into layer type coils and pie type coils. The segmented coil is an important structure form, which is usually classified as a subdivision type of layer type coil or pie type coil. The core feature is that the whole coil is divided into multiple independent segments or lines. The segments are isolated by insulation material, and the complete coil is formed by connecting the lines if necessary. This design is mainly used to optimize the electric field distribution, improve heat dissipation or adapt to special voltage or current requirements. However, the existing segmented transformer coil mainly relies on fixed tooling fixtures or single guide columns for positioning during winding and assembly to ensure the concentricity between the layers of the coil and the relative position with the core.

[0003] To this end, the present application designs a transformer coil adopting a rotary positioning pin array structure. The existing segmented transformer coil mainly relies on single or a small number of limiting components during assembly and operation, which can only achieve rough constraint in one of the axial or radial directions. It is difficult to cope with the positional deviation during assembly or thermal expansion and cold contraction during operation, resulting in the movement of coil segments along the axial direction or uneven interlayer gap. In the radial direction, it is difficult to resist the radial deviation caused by the difference in material rigidity or long-term operation vibration, leading to the misalignment of coil layers, local extrusion and damage of the insulation layer, and further affecting the insulation performance and short-circuit resistance of the transformer. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the present application provides a transformer coil adopting a rotary positioning pin array structure, which can effectively solve the problem that the segmented transformer coil in the prior art relies on single or a small number of limiting components, which is difficult to cope with the positional deviation during assembly or thermal expansion and cold contraction during operation, resulting in the movement of coil segments along the axial direction or uneven interlayer gap. In the radial direction, it is difficult to resist the radial deviation caused by the difference in material rigidity or long-term operation vibration, leading to the misalignment of coil layers, local extrusion and damage of the insulation layer, and further affecting the insulation performance and short-circuit resistance of the transformer.

[0005] To achieve the above-mentioned purposes, the present application is implemented by the following technical solutions:

[0006] The present application provides a transformer coil adopting a rotary positioning pin array structure, comprising:

[0007] The left and right two coil winding bodies are wound on the outer wall of the interlayer insulation cylinder, a plurality of partition bent plates are installed on the middle part of the outer wall of the interlayer insulation cylinder, the adjusting plates are symmetrically and slidably sleeved on the outer wall of the interlayer insulation cylinder, the axial positioning parts are respectively arranged on the interlayer insulation cylinder and the left and right adjusting plates, and the radial positioning parts are arranged on the partition bent plates.

[0008] The axial positioning part comprises a containing groove formed on the side wall of the interlayer insulation cylinder, a plurality of guide sliding holes are formed on the side wall of the interlayer insulation cylinder and communicated with the containing groove, a sliding plate fixedly connected to the corresponding adjusting plate is slidably installed on the inner wall of each guide sliding hole, a connecting ring is slidably installed on the inner wall of the containing groove, a plurality of matching plates are installed on one end of the connecting ring facing the partition bent plate, and a positioning column is arranged on the interlayer insulation cylinder and the plurality of matching plates.

[0009] The radial positioning part comprises an extension seat installed on the left and right outer walls of the vertical section of the partition bent plate, an installation groove is formed on the upper end of the horizontal section of the partition bent plate, a cover is installed on the inner wall of the installation groove, a positioning plate is slidably installed on the lower side of the inner wall of the installation groove, and an adjusting group is arranged on the cover and the adjacent two partition bent plates.

[0010] Further, the positioning group comprises a receiving groove formed on one end of the matching plate facing the middle part of the interlayer insulation cylinder, the receiving groove is designed in a convex shape, a ratchet strip is slidably installed on the inner wall of the receiving groove on one side facing the middle part of the interlayer insulation cylinder through a stretching spring, a lead screw is rotatably installed on the inner wall of the receiving groove on the side away from the middle part of the interlayer insulation cylinder, the lead screw is threadedly connected with a resisting sliding plate slidably connected to the inner wall of the receiving groove, and the opposite ends of the ratchet strip and the resisting sliding plate are both wedge-shaped structures.

[0011] Further, the positioning group further comprises an avoiding hole formed on the left and right ends of the matching plate, an adjusting rod is rotatably installed on the inner wall of one end of the containing groove facing the partition bent plate, the adjusting rod is slidably penetrated on the lead screw through the matching sliding strips on both sides, an installation seat is installed on the inner wall of the side of the containing groove away from the partition bent plate, the installation seat is rotatably sleeved on the outer wall of the adjusting rod, and a ratchet limiting piece is rotatably installed on the inner wall of the containing groove corresponding to the ratchet strip.

[0012] Further, the adjusting group comprises a plurality of insertion rods installed on the positioning plate on the side away from the cover corresponding to the adjacent two partition bent plates, a receiving hole is formed on the left end of the horizontal section of the partition bent plate and communicated with the installation groove, and an incomplete gear is rotatably installed on the inner wall of one end of the receiving hole facing the positioning plate.

[0013] Further, the adjusting group further comprises extension rods installed on the outer walls of every two adjacent incomplete gears on opposite sides, and a radial positioning pin is installed on the end of the extension rod away from the incomplete gear; every two adjacent incomplete gears are engaged with each other, and two insertion slots uniformly distributed in a circle are formed in the upper end of the incomplete gear corresponding to the insertion rod.

[0014] Further, the inner support group is symmetrically arranged on the inner wall of the interlayer insulation cylinder, and comprises a plurality of matching sliding grooves formed in the inner wall of the interlayer insulation cylinder, the matching sliding grooves are uniformly distributed in a rectangular shape, and a support plate is slidably installed on the inner wall of the matching sliding groove by a compression spring.

[0015] Further, the extension seat is symmetrically installed on the front and rear sides of the end of the adjusting plate close to the partition bending plate, an installation cavity is formed in the end of each extension seat facing the coil winding body, a limiting plate is slidably installed on the inner wall of the installation cavity by a compression spring, and a plurality of radial positioning pins are installed on the upper and lower sides of the end of the adjusting plate close to the partition bending plate.

[0016] Further, the axial positioning pin is installed on the end of the sliding plate away from the interlayer insulation cylinder, and a plurality of axial positioning pins are installed on the left and right sides of the partition bending plate on the outer wall of the interlayer insulation cylinder.

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

[0018] Compared with the prior art, the technical scheme provided by the application has the following beneficial effects:

[0019] The transformer coil adopting the rotary positioning pin array structure is provided, in the axial positioning and adjusting stage, the left and right two adjusting plates are sequentially pushed to slide along the outer wall of the interlayer insulation cylinder to the partition bending plate until the axial positioning pins abut against the end of the coil winding body, during which the cooperation plate also drives the corresponding ratchet strip to synchronously move to the partition bending plate, the ratchet wheel locks the position of the ratchet strip, at this time, the plurality of axial positioning pins on the adjusting plate and the axial positioning pins on the interlayer insulation cylinder jointly axially position the coil winding body, through the position adjustment of the ratchet strip and the one-way locking of the ratchet wheel limiting piece, the axial positioning requirement of the coil winding body of different lengths can be met, the adjustment synchronization is strong and the locking is reliable, and the problems of the coil winding body easily moving along the axial direction or the uneven interlayer gap due to the alignment deviation in subsequent assembly or thermal expansion and cold contraction in operation are avoided.

[0020] The radial positioning adjustment stage is that the plurality of radial positioning pins are tightly attached to the outer wall of the coil winding body to limit the radial direction of the coil winding body, and the plurality of limiting plates are also tightly attached to the outer wall of the coil winding body. When the left and right two adjusting plates are axially positioned and adjusted, the plurality of radial positioning pins and the limiting plates on the adjusting plates are also tightly attached to the outer wall of the coil winding body, further strengthening the radial limitation of the coil winding body, thereby realizing the effect of the plurality of radial positioning pins and the limiting plates collectively limiting the radial direction of the coil winding body, avoiding the radial deviation of the coil winding body due to the difference in material rigidity or long-term operation vibration, causing the misalignment between the coil layers and the local extrusion and damage of the insulation layer, and further affecting the insulation performance and short-circuit resistance of the transformer. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application.

[0023] Figure 2 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application.

[0024] Figure 3 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application.

[0025] Figure 4 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application.

[0026] Figure 5 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application.

[0027] Figure 6 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application.

[0028] Figure 7 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application.

[0029] Figure 8 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application.

[0030] Figure 9 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application. Figure 8 The figure is a schematic view of the three-dimensional structure in the embodiment of the present application.

[0031] The reference signs in the drawings represent: 1, interlayer insulation cylinder; 11, support plate; 2, coil winding body; 3, partition bending plate; 4, adjusting plate; 5, axial positioning part; 51, sliding plate; 511, axial positioning pin; 52, connecting ring; 53, matching plate; 54, positioning group; 541, ratchet bar; 542, screw rod; 543, abutting sliding plate; 544, adjusting rod; 545, mounting seat; 546, ratchet limiting part; 6, radial positioning part; 61, extension seat; 611, limiting plate; 62, cover; 63, alignment plate; 64, adjusting group; 641, insertion rod; 642, incomplete gear; 643, extension rod; 644, radial positioning pin. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

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

[0034] Embodiment:

[0035] Please refer to Figures 1-9 The present application provides a technical solution: a transformer coil adopting a rotary positioning pin array structure, comprising:

[0036] An interlayer insulation cylinder 1, two coil winding bodies 2 are wound on the outer wall of the interlayer insulation cylinder 1, a plurality of partition bending plates 3 are installed on the middle part of the outer wall of the interlayer insulation cylinder 1, the plurality of partition bending plates 3 are evenly distributed in a rectangular shape, an adjusting plate 4 is slidingly sleeved on the outer wall of the interlayer insulation cylinder 1 in a left-right symmetrical manner, an axial positioning part 5 is arranged on the interlayer insulation cylinder 1 and the adjusting plates 4 on the left and right sides, and a radial positioning part 6 is arranged on the partition bending plate 3;

[0037] The axial positioning part 5 comprises a containing groove formed on the side wall of the interlayer insulation cylinder 1, a plurality of guide sliding holes are formed on the side wall of the interlayer insulation cylinder 1 and communicated with the containing groove, the plurality of guide sliding holes are evenly distributed in a rectangular shape, a sliding plate 51 is slidingly installed on the inner wall of each of the plurality of guide sliding holes and fixedly connected to the corresponding adjusting plate 4, a connecting ring 52 is slidingly installed on the inner wall of the containing groove, a plurality of matching plates 53 are installed on one end of the connecting ring 52 towards the partition bending plate 3, the plurality of matching plates 53 are evenly distributed in a rectangular shape, and a positioning group 54 is arranged on the interlayer insulation cylinder 1 and the plurality of matching plates 53;

[0038] The radial positioning part 6 includes an extension seat 61 installed on the outer wall of the left and right sides of the vertical section of the partition bending plate 3, an installation slot is formed on the upper end of the horizontal section of the partition bending plate 3, a cover 62 is installed on the upper side of the inner wall of the installation slot, a positioning plate 63 is slidably installed on the lower side of the inner wall of the installation slot, and an adjusting group 64 is arranged on the cover 62 and the adjacent two partition bending plates 3.

[0039] The positioning group 54 includes a receiving slot formed on one end of the middle part of the interlayer insulation cylinder 1 on the matching plate 53, the receiving slot is designed in a convex shape, a ratchet strip 541 is slidably installed on one side of the middle part of the interlayer insulation cylinder 1 on the inner wall of the receiving slot through a tension spring, a lead screw 542 is rotatably installed on the inner wall of the left and right ends of the receiving slot away from one side of the middle part of the interlayer insulation cylinder 1, the lead screw 542 is connected with a resisting sliding plate 543 slidably connected to the inner wall of the receiving slot through a thread, and the opposite ends of the ratchet strip 541 and the resisting sliding plate 543 are both wedge-shaped structures.

[0040] The positioning group 54 further includes an avoiding hole formed on the left and right ends of the matching plate 53, an adjusting rod 544 is rotatably installed on the inner wall of one end of the receiving slot facing the partition bending plate 3, the adjusting rod 544 is slidably penetrated on the lead screw 542 through the matching sliding strips on both sides, an installation seat 545 is installed on the inner wall of one side of the receiving slot away from the partition bending plate 3, the installation seat 545 is rotatably sleeved on the outer wall of the adjusting rod 544, a ratchet limiting piece 546 is rotatably installed on the inner wall of the receiving slot corresponding to the ratchet strip 541, and the ratchet limiting piece 546 is composed of a ratchet wheel, a ratchet pawl and a blocking seat.

[0041] The adjusting group 64 includes a plurality of insertion rods 641 installed on the positioning plate 63 away from the cover 62 corresponding to the adjacent two partition bending plates 3, the plurality of insertion rods 641 are evenly distributed in a rectangular shape, a receiving hole is formed on the left end of the horizontal section of the partition bending plate 3 and is communicated with the installation slot, and an incomplete gear 642 is rotatably installed on the inner wall of one end of the receiving hole facing the positioning plate 63.

[0042] The adjusting group 64 further includes an extension rod 643 installed on the outer wall of each adjacent two incomplete gears 642 away from each other, a radial positioning pin 644 is installed on one end of the extension rod 643 away from the incomplete gear 642, and each adjacent two incomplete gears 642 are meshed with each other, and two insertion grooves evenly distributed in a circle are formed on the upper end of the incomplete gear 642 corresponding to the insertion rod 641.

[0043] The inner support group is symmetrically arranged on the inner wall of the interlayer insulation cylinder 1, and includes a plurality of matching sliding grooves formed on the inner wall of the interlayer insulation cylinder 1, the plurality of matching sliding grooves are evenly distributed in a rectangular shape, and a support plate 11 is slidably installed on the inner wall of the matching sliding groove through a compression spring, and one end of the support plate 11 away from the interlayer insulation cylinder 1 is a wedge-shaped structure.

[0044] The adjusting plate 4 is symmetrically installed with an extension seat 61 on the front and back sides of one end close to the partition bending plate 3, each extension seat 61 is provided with an installation cavity on one end close to the corresponding coil winding body 2, a limiting plate 611 is slidably installed on the inner wall of the installation cavity through a compression spring, and the adjusting plate 4 is installed with a plurality of radial positioning pins 644 on the upper and lower sides of one end close to the partition bending plate 3, and the plurality of radial positioning pins 644 are uniformly distributed from front to back.

[0045] The plurality of sliding plates 51 are installed with axial positioning pins 511 on one end away from the interlayer insulation cylinder 1, the interlayer insulation cylinder 1 is installed with a plurality of axial positioning pins 511 on the outer wall on the left and right sides of the partition bending plate 3, the plurality of axial positioning pins 511 are uniformly distributed in a rectangular shape, and the plurality of axial positioning pins 511 on the front and back sides are respectively fixedly connected to the corresponding extension seats 61.

[0046] The upper end of the alignment plate 63 is connected to the adjacent two cover plates 62 through a compression spring on the front and back sides.

[0047] In specific implementation:

[0048] Firstly, the left and right two adjusting plates 4 and the left and right two alignment plates 63 in the application are initially away from each other, at this time, the plurality of abutting sliding plates 543 are respectively located on one side of the corresponding lead screw 542 close to the partition bending plate 3, and respectively abut and push out the corresponding ratchet strip 541 from the storage slot, at this time, the ratchet strip 541 is engaged with the ratchet wheel in the ratchet wheel limiting piece 546, it needs to be noted that under the cooperation of the ratchet claw and the blocking seat in the ratchet wheel limiting piece 546, the ratchet wheel can only rotate in one direction, so that the ratchet strip 541 in the extended state can only move towards the partition bending plate 3 and cannot move reversely after moving to be position-locked, and the radial positioning pin 644 and the axial positioning pin 511 are all in a waiting limiting state, the radial positioning pin 644 on the partition bending plate 3 is initially located in the corresponding storage hole, the alignment plate 63 is initially attached to the corresponding plurality of incomplete gear wheels 642, and the support plate 11 of the inner support group maintains the initial supporting state under the action of the compression spring.

[0049] In the winding stage of the coil winding body 2, the staff first places the interlayer insulation cylinder 1 on the externally provided winding machine and fixes and clamps it, after clamping is completed, the winding machine is used to perform the coil winding work, until one coil winding body 2 is wound on the left and right sides of the partition bending plate 3 on the interlayer insulation cylinder 1, and the left and right two coil winding bodies 2 are respectively taken as the starting reference based on the plurality of axial positioning pins 511 on the left and right sides of the partition bending plate 3 during winding, so as to preliminarily position the coil winding body 2, at the beginning of winding, the plurality of limiting plates 611 will be sequentially extruded by the coil wire and will be retracted into the corresponding installation cavity for avoidance, until after the winding is completed, under the action of the compression spring, the plurality of limiting plates 611 will be sequentially extended into the corresponding installation cavity.

[0050] The axial positioning adjustment stage, according to the axial size of the coil winding body 2, the left and right two adjustment plates 4 are sequentially pushed by the staff to slide along the outer wall of the interlayer insulation cylinder 1 to the partition bending plate 3, the adjustment plate 4 drives the corresponding connecting ring 52 to slide synchronously to the partition bending plate 3 through the plurality of sliding plates 51, the connecting ring 52 drives the corresponding axial positioning pin 511 to move synchronously to the partition bending plate 3 through the plurality of matching plates 53, until the axial positioning pin 511 is tightly contacted with the end of the coil winding body 2, during which the matching plate 53 also drives the corresponding ratchet strip 541 to move synchronously to the partition bending plate 3, the ratchet wheel rotates in one direction under the action of the ratchet strip 541 and is locked in position again after the ratchet strip 541 stops, at this time, the plurality of axial positioning pins 511 on the adjustment plate 4 will limit the axial position of the coil winding body 2 together with the axial positioning pins 511 on the interlayer insulation cylinder 1, through the position adjustment of the ratchet strip 541 and the one-way locking of the ratchet wheel limiting piece 546, the axial positioning requirement of the coil winding body 2 of different lengths can be adapted, the adjustment synchronization is strong and the locking is reliable, which avoids the problems of axial movement or uneven interlayer gap of the coil winding body 2 due to the deviation of the subsequent assembly or thermal expansion and contraction in operation.

[0051] The radial positioning adjustment stage, after the coil winding body 2 is axially positioned, the upper and lower two alignment plates 63 are sequentially pulled by the staff to slide to the side of the cover 62 along the installation groove, because the alignment plate 63 is initially attached to the corresponding plurality of incomplete gears 642, the plurality of insertion rods 641 are initially inserted into the insertion slots in the corresponding incomplete gears 642, the alignment plate 63 drives the plurality of insertion rods 641 to move synchronously to the side of the cover 62 to exit the corresponding insertion slots, then the staff sequentially actuates the plurality of radial positioning pins 644 on one side to rotate 90 degrees around the corresponding incomplete gears 642, under the meshing action of the adjacent two incomplete gears 642, the adjacent two incomplete gears 642 synchronously rotate 90 degrees in opposite directions, thereby realizing the effect that the plurality of radial positioning pins 644 on the left and right sides synchronously rotate 90 degrees in opposite directions, then the staff releases the alignment plate 63, under the action of the compression spring, the alignment plate 63 slides along the installation groove to the side of the outer wall of the interlayer insulation cylinder 1 until the alignment plate 63 is attached to the corresponding plurality of incomplete gears 642 again to restore the original position, at this time, the plurality of insertion rods 641 are inserted into the insertion slots in the corresponding incomplete gears 642 again, thereby realizing the effect of locking the position of the plurality of radial positioning pins 644.

[0052] When the plurality of radial positioning pins 644 are all extended 90 degrees towards the coil winding body 2, the plurality of radial positioning pins 644 will closely fit on the outer wall of the coil winding body 2 and limit it in the radial direction. At the same time, after the plurality of limiting plates 611 are sequentially extended into the corresponding installation cavities during the winding stage of the coil winding body 2, they will also closely fit on the outer wall of the coil winding body 2. In addition, after the left and right two adjusting plates 4 are axially positioned and adjusted, the plurality of radial positioning pins 644 and limiting plates 611 on the adjusting plate 4 will also closely fit on the outer wall of the coil winding body 2, further strengthening the radial limitation of the coil winding body 2, thereby realizing the effect of the plurality of radial positioning pins 644 and limiting plates 611 collectively limiting the coil winding body 2 in the radial direction, avoiding the radial deviation of the coil winding body 2 due to the difference in material rigidity or long-term operation vibration, causing the misalignment between the coil layers, the local extrusion and damage of the insulation layer, and further affecting the insulation performance and short-circuit resistance of the transformer.

[0053] Assembly auxiliary positioning stage, after the above positioning and adjustment is completed, the coil winding body 2 is stably assembled through the axial positioning pins 511 and the radial positioning pins 644 to form a complete high-voltage coil. The staff checks the fit of each positioning component with the coil winding body 2 and confirms that there is no looseness or deviation, and then the subsequent insulation treatment and overall assembly of the transformer can be carried out. It should be noted that when assembling the transformer, the low-voltage coil prepared in advance should be sleeved outside the core column to ensure uniform gap with the core, and then the high-voltage coil in the present application is sleeved outside the low-voltage coil. During this period, the plurality of supporting plates 11 always resist the outer wall of the low-voltage coil under the action of the compression spring, offset the external pressure, and further prevent the low-voltage coil from moving radially, and facilitate the subsequent insertion of the supporting strips into the gap between the interlayer insulation cylinder 1 and the low-voltage coil.

[0054] It should be noted that the present application adopts a positioning method of multiple-point axial limitation and multiple-point radial limitation, which avoids the problem of low constraint force caused by force concentration of single or small number of limiting components. In combination with the supporting plate 11, the bidirectional positioning effect of the low-voltage coil and the high-voltage coil can be realized, avoiding the problem that the cumulative tolerance is large when assembling the multi-section coil, affecting the winding concentricity, causing the electric field strength at the gap to be too narrow to significantly increase and exceed the withstand strength of the insulation medium, thereby causing local discharge, insulation material breakdown, and finally causing inter-phase short circuit or ground short circuit failure.

[0055] The replacement maintenance stage needs to be explained that the mounting seat 545 in the application is detachably mounted on the interlayer insulation cylinder 1. First, the staff controls the multiple adjusting rods 544 on the left and right sides in sequence through adjusting tools to rotate. The adjusting rod 544 drives the multiple lead screws 542 to rotate synchronously through the matching slide strip, so that the abutting slide plate 543 slides along the storage groove to the side away from the partition bent plate 3. Until under the action of the extension spring, the multiple ratchet strips 541 on the left and right sides are all retracted into the corresponding storage groove. At this time, the wedge-shaped end face of the abutting slide plate 543 will be mutually fitted with the wedge-shaped end face of the ratchet strip 541, and the ratchet strip 541 will be unlocked from the position of the ratchet after retraction, and can be freely moved left and right. That is, the staff can detach the multiple mounting seats 545 in sequence. Then continue to pull the left and right two adjusting plates 4 to make them slide along the outer wall of the interlayer insulation cylinder 1 to the side away from the partition bent plate 3. The adjusting plate 4 drives the corresponding connecting ring 52 to slide synchronously to the side away from the partition bent plate 3 through the multiple sliding plates 51. The connecting ring 52 drives the corresponding axial positioning pin 511 to move synchronously to the side away from the partition bent plate 3 through the multiple matching plates 53. Until the staff takes out the left and right two adjusting plates 4 and the connecting ring 52 for modular replacement work, the assembly efficiency is high, and the disassembly and maintenance time of the axial positioning pin 511 and the radial positioning pin 644 is effectively reduced.

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

[0057] Advantage one, axial positioning adjustment stage, the staff pushes the left and right two adjusting plates 4 in sequence to make them slide along the outer wall of the interlayer insulation cylinder 1 to the partition bent plate 3. Until the axial positioning pin 511 abuts against the end of the coil winding body 2. During this period, the matching plate 53 will also drive the corresponding ratchet strip 541 to move synchronously to the partition bent plate 3. The ratchet wheel will lock the position of the ratchet strip 541. At this time, the multiple axial positioning pins 511 on the adjusting plate 4 will jointly position the coil winding body 2 with the axial positioning pins 511 on the interlayer insulation cylinder 1. Through the position adjustment of the ratchet strip 541 and the one-way locking of the ratchet limiting piece 546, the axial positioning demand of the coil winding body 2 with different lengths can be met. The adjustment is synchronous and the locking is reliable, which avoids the problems of easy movement along the axial direction or uneven interlayer gap of the coil winding body 2 due to the deviation of the subsequent assembly or thermal expansion and contraction in operation.

[0058] Advantage two, radial positioning adjustment stage, the staff pulls the upper and lower two alignment plates 63 in turn, so that the alignment plate 63 slides along the installation slot to the side of the cover 62, then the staff drives the unilateral multiple radial positioning pins 644 in turn, so that it rotates 90 degrees around the corresponding incomplete gear 642, the adjacent two incomplete gears 642 will rotate 90 degrees in the opposite direction synchronously, so as to realize the effect that the multiple radial positioning pins 644 on the left and right sides rotate 90 degrees in the opposite direction synchronously, then the staff releases the alignment plate 63, under the action of the compression spring, the alignment plate 63 will slide along the installation slot to the side of the outer wall of the interlayer insulation cylinder 1, until the alignment plate 63 is restored to the original position by adhering to the corresponding multiple incomplete gears 642 again, at this time the multiple insertion rods 641 will be inserted into the insertion slot on the corresponding incomplete gear 642 again, so as to realize the effect of locking the position of the multiple radial positioning pins 644.

[0059] Advantage three, the multiple radial positioning pins 644 will closely adhere to the outer wall of the coil winding body 2 for radial limiting, at the same time the multiple limiting plates 611 will also closely adhere to the outer wall of the coil winding body 2, when the left and right two adjustment plates 4 are axially positioned and adjusted, the multiple radial positioning pins 644 and the limiting plates 611 on the adjustment plate 4 will also closely adhere to the outer wall of the coil winding body 2, further strengthening the radial limiting of the coil winding body 2, so as to realize the effect that the multiple radial positioning pins 644 and the limiting plates 611 jointly limit the coil winding body 2 in the radial direction, avoiding the radial deviation of the coil winding body 2 due to the difference in material rigidity or long-term operation vibration, causing the coil interlayer misalignment, local insulation layer extrusion damage, and further affecting the insulation performance and short circuit resistance of the transformer.

[0060] Advantage four, assembly auxiliary positioning stage, the coil winding body 2 is stably assembled through the axial positioning pins 511 and the radial positioning pins 644, forming a complete high-voltage coil, when assembling the transformer, the low-voltage coil prepared in advance needs to be sleeved outside the iron core column to ensure uniform gap with the iron core, then the high-voltage coil in the application is sleeved outside the low-voltage coil, during which the multiple supporting plates 11 always resist the outer wall of the low-voltage coil under the action of the compression spring, offsetting the external pressure, and further preventing the radial displacement of the low-voltage coil, and facilitating the subsequent insertion of the supporting strips into the gap between the interlayer insulation cylinder 1 and the low-voltage coil.

[0061] Advantage five, the application adopts a positioning method of multiple-point axial limiting and multiple-point radial limiting, avoiding the problem of force concentration and low constraint force of single or small number of limiting components, and realizing the bidirectional positioning effect of the low-voltage coil and the high-voltage coil in cooperation with the supporting plate 11, avoiding the problem that the cumulative tolerance is large when assembling multiple segmented coils, affecting the winding concentricity, causing the electric field strength of the gap to be too narrow to significantly increase and exceed the withstand strength of the insulation medium, thereby causing local discharge, insulation material breakdown, and finally causing interphase short circuit or ground short circuit failure.

[0062] The sixth advantage is that in the replacement and maintenance stage, the workers first control the plurality of adjusting rods 544 on the left and right sides to rotate in sequence by adjusting tools until the plurality of ratchet strips 541 on the left and right sides are all retracted into the corresponding receiving grooves, and then the workers can disassemble the plurality of mounting seats 545 in sequence, and then continue to pull the left and right adjusting plates 4 until the workers take out the left and right adjusting plates 4 and the connecting ring 52 to perform modular replacement work, so that the assembly efficiency is high, and the disassembly and maintenance time of the axial positioning pin 511 and the radial positioning pin 644 is effectively reduced.

[0063] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

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 opened on the side wall of the interlayer insulating cylinder (1). The side wall of the interlayer insulating cylinder (1) is also provided with a number of guide sliding holes connected to the receiving groove. The inner walls of the number of 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. A number of 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 insulating cylinder (1) and the number of mating plates (53). The radial positioning part (6) includes an extension seat (61) installed on the outer walls of the vertical section of the partition plate (3) on both sides. 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).

2. A transformer coil with a rotating positioning pin array structure according to claim 1, characterized in that: The positioning assembly (54) includes a storage groove located on the mating plate (53) facing the middle of the interlayer insulating 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 insulating cylinder (1) by 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 insulating 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 wedge-shaped structures.

3. A transformer coil employing a rotating positioning pin array structure according to claim 2, characterized in that: 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).

4. 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 two adjacent partition plates (3) at the end of the alignment plate (63) away from the cover (62). 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).

5. A transformer coil employing a rotating positioning pin array structure according to claim 4, characterized in that: 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) in a circumferentially evenly distributed manner.

6. A transformer coil with a rotating positioning pin array structure according to claim 1, characterized in that: The inner wall of the interlayer insulation 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 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 a compression spring.

7. A transformer coil employing 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).

8. 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).

9. A transformer coil employing a rotating positioning pin array structure according to claim 4, 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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