Adjustable mold structure for winding transformer coil

Abstract

The utility model relates to an adjustable mold structure for winding a transformer coil, and belongs to the technical field of transformers. According to the technical scheme, a longitudinally-arranged groove (14) is formed in the top of a foundation supporting strip (5) on the outermost side of a cylindrical structure, and a coil supporting strip (12) is clamped in the groove; the diameter range of the basic supporting strips (5) of the adjustable mold (11) meets the requirement for the inner diameter of a wound transformer coil, the number of the supporting belts of the adjustable mold (11) is equal to the number of the coil supporting strips of the transformer coil, one coil supporting strip is clamped by the basic supporting strip on each supporting belt, and winding operation of the transformer coil is directly carried out. The device meets the requirements of products and is convenient to operate; after the adjustable mold is adjusted to the diameter meeting the requirement of the inner diameter of the coil, the coil can be directly wound, the adjustable mold has the structural advantages of an iron mold at the same time, the adjustable mold is optimized, and the links of uniform distribution, lineation, stay fixing and the like are omitted; the coil manufacturing efficiency is effectively improved, manpower is saved, and the adjustable mold is convenient to popularize and use.

Description

Technical Field

[0001] The utility model relates to an adjustable die structure for winding transformer coils, belonging to the technical field of transformers. Background Art

[0002] In the field of transformer manufacturing, with the improvement of manufacturing level and the continuous optimization of coil structures, adjustable molds are mostly used for coil winding. For example, in Chinese Patent CN 201410322532.7 named "An Adjustable Mold for Transformer Coil Winding", multiple sets of sliding sleeve mechanisms are evenly arranged along the axial direction on the mandrel, the driving mechanism is drivingly connected with the multiple sets of sliding sleeve mechanisms, and each set of sliding sleeve mechanisms is connected with the same auxiliary support bar through a strut. By driving the sliding sleeve mechanisms to slide on the mandrel through the driving mechanism, the angle between the strut and the mandrel will change, thereby driving the basic support bar thereon to open or contract, causing the outer diameter to change, so as to meet the requirements of coil winding; the size adjustment of the adjustable mold is convenient and more suitable for use with vertical winding machines, which is the promotion direction of coil molds. However, traditional iron molds also have certain advantages. Referring to Attachments Figure 1 、 2 , the iron mold is composed of a mold core, channel steel support bars and adjusting pads. The mold core of the iron mold is composed of a support plate, a connecting pipe and a bushing, and its outer shape is a cylinder. Threaded holes are evenly distributed on the support plate according to the number of coil support bars. Generally, 3 - 4 types of numbers of support bars will be arranged on each support plate. When using the iron mold, a mold core with a suitable size is selected according to the coil drawing, and then the channel steel support bars are installed, and adjusting pads with suitable sizes are padded under the channel steel support bars to achieve the inner diameter size required for the coil. The satisfaction of different diameters by the iron mold is achieved by adjusting the different thicknesses of the adjusting pads to meet small-size adjustments, and for large-diameter adjustments, mold cores with different diameters are selected. The support bars of the coil itself are placed in the grooves of the channel steel support bars. Generally, the mold core size is in one gear of 100mm, and the adjusting pad size is in one gear of 0.5mm to meet the needs of different diameters. The bushing is used for supporting installation with the winding machine. For operators accustomed to using iron molds, there are various discomforts in using adjustable molds, which seriously affect production efficiency and the popularization and use of adjustable molds. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an adjustable die structure for winding transformer coils, which fits the product requirements and is convenient to operate; in particular, the number of adjustable die support belts is equal to the number of coil support bars of the transformer coil. After the adjustable die is adjusted to a diameter suitable for the inner diameter requirement of the coil, the coil can be directly wound, realizing that the adjustable die simultaneously has the structural advantages of the iron mold, optimizing the adjustable die, saving links such as equal division, scribing and fixing support bars, etc.; in addition, during winding, the position adjustment of the coil support bars is avoided, and the internal space for various bindings during coil winding is large, effectively improving the coil manufacturing efficiency, saving manpower, facilitating the popularization and use of adjustable molds, and solving the above technical problems existing in the prior art.

[0004] The technical solution of the present utility model is as follows:

[0005] Based on the same concept, the present utility model includes three technical solutions:

[0006] Technical solution one: An adjustable mold structure for winding a transformer coil, comprising a mandrel, a sliding sleeve mechanism, a basic support bar, a driving mechanism, and a support rod. Multiple sets of sliding sleeve mechanisms are evenly arranged along the axial direction on the mandrel, and the driving mechanism is drivingly connected to the multiple sets of sliding sleeve mechanisms; each set of sliding sleeve mechanisms is connected to the same basic support bar through a support rod. The sliding sleeve mechanism, the support rod, and the basic support bar together form a support belt arranged radially along the mandrel. Multiple support belts are evenly distributed on the mandrel, and the whole forms a cylindrical structure, which is called an adjustable mold; a longitudinally arranged groove is provided at the top of the outermost basic support bar of the cylindrical structure, and a coil support bar is clamped in the groove; the diameter range of the basic support bar of the adjustable mold meets the requirement of the inner diameter of the wound transformer coil. The number of support belts of the adjustable mold is equal to the number of coil support bars of the transformer coil. Each basic support bar on each support belt clamps a coil support bar, and the winding operation of the transformer coil is directly carried out.

[0007] Technical solution two: An adjustable mold structure for winding a transformer coil, comprising a mandrel, a sliding sleeve mechanism, a basic support bar, a driving mechanism, and a support rod. Multiple sets of sliding sleeve mechanisms are evenly arranged along the axial direction on the mandrel, and the driving mechanism is drivingly connected to the multiple sets of sliding sleeve mechanisms; each set of sliding sleeve mechanisms is connected to the same basic support bar through a support rod. The sliding sleeve mechanism, the support rod, and the basic support bar together form a support belt arranged radially along the mandrel. Multiple support belts are evenly distributed on the mandrel, and the whole forms a cylindrical structure, which is called an adjustable mold; a longitudinally arranged groove is provided at the top of the outermost basic support bar of the cylindrical structure. The diameter range of the basic support bar of the adjustable mold meets the requirement of the inner diameter of the wound transformer coil. The number of support belts is not equal to the number of coil support bars. Each basic support bar on each support belt cannot correspond one by one with the coil support bar. The outer side of the basic support bar is wrapped with cardboard or a cardboard tube is inserted into it, and the coil support bars of the transformer coil are fixed on the outer side of the cardboard or the cardboard tube, and then the winding operation of the transformer coil is carried out.

[0008] Technical Solution 3: An adjustable mold structure for winding transformer coils, which includes a mandrel, a sliding sleeve mechanism, a basic support bar, a driving mechanism, and a support rod. Multiple sets of sliding sleeve mechanisms are evenly arranged along the axial direction on the mandrel, and the driving mechanism is drivingly connected to the multiple sets of sliding sleeve mechanisms; each set of sliding sleeve mechanisms is connected to the same basic support bar through a support rod. The sliding sleeve mechanism, the support rod, and the basic support bar together form a support belt arranged radially along the mandrel. Multiple support belts are evenly distributed on the mandrel, and the whole forms a cylindrical structure, which is called an adjustable mold; a longitudinally arranged groove is provided at the top of the outermost basic support bar of the cylindrical structure. The diameter range of the basic support bar of the adjustable mold cannot meet the inner diameter requirement for winding the transformer coil. An auxiliary support bar is clamped in the groove. After the auxiliary support bar is clamped, the diameter range of the basic support bar of the adjustable mold meets the inner diameter requirement for winding the transformer coil. The auxiliary support bar is wrapped with cardboard or a cardboard tube is inserted into it. The coil support bar of the transformer coil is fixed on the outside of the cardboard or the cardboard tube, and then the winding operation of the transformer coil is carried out.

[0009] The thickness of the auxiliary support bar can be set and manufactured according to needs, and is used to supplement the diameter range of the adjustable mold.

[0010] The auxiliary support bar consists of an auxiliary support bar plane, an auxiliary support bar slope, and an auxiliary support bar limit protrusion. The auxiliary support bar limit protrusion is located at the bottom of the auxiliary support bar, and the width of the auxiliary support bar limit protrusion matches the width of the groove at the top of the basic support bar. The auxiliary support bar limit protrusion is embedded in the groove; the auxiliary support bar plane is located at the top center of the auxiliary support bar, and the auxiliary support bar slope is around the auxiliary support bar plane.

[0011] A horizontally arranged auxiliary support bar binding groove is provided on the auxiliary support bar plane; the auxiliary support bar limit protrusion is used to fix and limit the auxiliary support bar to be clamped in the groove of the basic support bar. The auxiliary support bar is firmly fixed to the adjustable mold with an auxiliary support bar binding band in the auxiliary support bar binding groove. At the same time, because the auxiliary support bar binding groove has a certain depth, it can effectively ensure that the auxiliary support bar binding band will not protrude from the outer surface of the auxiliary support bar and will not affect the overall outer diameter of the adjustable mold.

[0012] The number of the auxiliary support bar binding grooves is 2 - 3, which are evenly distributed along the length direction of the auxiliary support bar. The auxiliary support bar binding groove cooperates with the auxiliary support bar binding band, and the installation is simple and fast. Compared with the existing technology in which each support bar of the additional layer of the adjustable mold needs to be tightened and fixed with more than eight bolts, the operation efficiency is greatly improved.

[0013] The basic support bar consists of a support bar crown and a support bar bottom. The support bar bottom is fixedly connected to the support rod, and a groove is provided at the top of the support bar crown.

[0014] The width of the groove is a. At the same time, in order to ensure the roundness of the adjustable mold at the minimum diameter and ensure that the coil can be smoothly wound at the minimum diameter of the adjustable mold, a plane with a width of b is reserved on the support bar crown outside the groove, and a slope is provided on the outside of the plane to ensure that when the adjustable mold is at the minimum diameter, the inner guide of the coil can be conveniently installed.

[0015] Both ends of the mandrel are respectively provided with a bottom faceplate and a top faceplate.

[0016] A shackle is provided on the bottom faceplate.

[0017] The driving mechanism is arranged at a position of the mandrel close to the bottom faceplate.

[0018] According to the inner diameter requirement of the coil drawing, select an adjustable mold with an outer diameter of the cylindrical structure matching the inner diameter requirement for winding the transformer coil, and install it on the winding machine; if the diameter range of the basic support bars of the adjustable mold meets the inner diameter requirement for winding the transformer coil, the number of support belts of the adjustable mold is equal to the number of coil support bars of the transformer coil, and each basic support bar on each support belt holds one coil support bar, and directly carry out the winding operation of the transformer coil; if the diameter range of the basic support bars of the adjustable mold meets the inner diameter requirement for winding the transformer coil, but the number of support belts is not equal to the number of coil support bars, each basic support bar on each support belt cannot correspond to the coil support bars one by one, wrap cardboard outside the basic support bar or insert it into a cardboard tube, and fix the coil support bars of the transformer coil on the outside of the cardboard or cardboard tube, and then carry out the winding operation of the transformer coil; if the diameter range of the basic support bars of the adjustable mold does not meet the inner diameter requirement for winding the transformer coil, clamp the auxiliary support bars in the groove, and after clamping the auxiliary support bars, the diameter range of the basic support bars of the adjustable mold meets the inner diameter requirement for winding the transformer coil, wrap cardboard outside the auxiliary support bar or insert it into a cardboard tube, and fix the coil support bars of the transformer coil on the outside of the cardboard or cardboard tube, and then carry out the winding operation of the transformer coil.

[0019] If the number of support belts of the adjustable mold is equal to the number of coil support bars of the transformer coil, and each basic support bar on each support belt corresponds to the coil support bars one by one, since the multiple support belts arranged radially of the adjustable mold are evenly distributed on the mandrel, there is no need to calculate the support bar spacing, draw equally divided lines on the cardboard tube, etc., and directly wind the transformer coil.

[0020] If the number of support belts of the adjustable mold is not equal to the number of coil support bars of the transformer coil, and each basic support bar on each support belt cannot correspond to the coil support bars one by one, then it is necessary to wrap cardboard outside the adjustable mold or insert it into a cardboard tube, evenly divide and draw lines on the outside of the cardboard or cardboard tube according to needs, and then fix the coil support bars to start winding the transformer coil.

[0021] The adjustment of the outer diameter of the cylindrical structure is driven by the driving mechanism to drive the sliding sleeve mechanism to slide on the mandrel, and the angle between the support rod and the mandrel will change, thereby driving the basic support bars and auxiliary support bars thereon to open or contract, resulting in a change in the outer diameter of the cylindrical structure to meet the coil winding requirements.

[0022] The bottom faceplate and the top faceplate are used for supporting installation with the winding machine, and the shackle is used for hoisting the adjustable mold.

[0023] The driving mechanism is arranged at a position on the mandrel close to the bottom faceplate, and the driving mechanism is provided with maximum and minimum diameter limits to prevent over-operation.

[0024] The baffle is a bracket for supporting the coil when it is used in a vertical winding machine.

[0025] The number of various support bars can be specified according to product requirements, and the structure and material of the support bars can be customized.

[0026] The positive effects of the present utility model are as follows: it conforms to product requirements and is convenient to operate; in particular, the number of adjustable die support belts is equal to the number of coil support bars of the transformer coil. After the adjustable die is adjusted to a diameter suitable for the inner diameter requirement of the coil, the coil can be directly wound, realizing that the adjustable die has the structural advantages of an iron die at the same time, optimizing the adjustable die, saving links such as equal division, scribing, and fixing the support bars; in addition, during winding, avoiding adjusting the position of the coil support bars and having a large internal space for various bindings during coil winding effectively improves the coil manufacturing efficiency, saves manpower, and is convenient for the popularization and use of the adjustable die. Description of the Drawings

[0027] Figure 1 It is the front view of the existing iron die;

[0028] Figure 2 It is the side view of the existing iron die;

[0029] Figure 3 It is the front view of the embodiment of the present utility model;

[0030] Figure 4 It is the side view of the embodiment of the present utility model;

[0031] Figure 5 It is the schematic diagram of the working state of the first embodiment of the present utility model;

[0032] Figure 6 It is the schematic diagram of the working state of the second embodiment of the present utility model;

[0033] Figure 7 It is the schematic diagram of the working state of the third embodiment of the present utility model;

[0034] Figure 8 It is the schematic diagram of the basic support bar of the embodiment of the present utility model;

[0035] Figure 9 It is the schematic diagram of the auxiliary support bar of the embodiment of the present utility model;

[0036] Figure 10 It is the side view schematic diagram of the auxiliary support bar of the embodiment of the present utility model;

[0037] In the figure: mandrel 1, sliding sleeve mechanism 2, baffle 3, bottom flower plate 4, basic support bar 5, auxiliary support bar 6, shackle 7, drive mechanism 8, support rod 9, top flower plate 10, adjustable die 11, coil support bar 12, cardboard tube 13, groove 14, plane 15, slope 16, support bar crown 17, support bar bottom 18, auxiliary support bar plane 19, auxiliary support bar slope 20, auxiliary support bar limit protrusion 21, auxiliary support bar lashing groove 22, auxiliary support bar lashing band 23, support plate 24, connecting pipe 25, channel steel support bar 26, adjusting pad 27, bushing 28. Detailed implementation manners

[0038] The following further describes the present utility model through embodiments in conjunction with the accompanying drawings.

[0039] Embodiment 1, Technical Solution 1: An adjustable die structure for winding a transformer coil, including a mandrel 1, a sliding sleeve mechanism 2, a basic support bar 5, a drive mechanism 8, and a support rod 9. A plurality of sets of sliding sleeve mechanisms 2 are uniformly arranged along the axial direction on the mandrel 1, and the drive mechanism 8 is drivingly connected to the plurality of sets of sliding sleeve mechanisms 2; each set of sliding sleeve mechanisms 2 is connected to the same basic support bar 5 through a support rod 9. The sliding sleeve mechanism 2, the support rod 9, and the basic support bar 5 together form a support belt arranged radially along the mandrel 1. A plurality of support belts are evenly distributed on the mandrel, and the whole forms a cylindrical structure, which is called an adjustable die 11; a longitudinally arranged groove 14 is provided at the top of the outermost basic support bar 5 of the cylindrical structure, and a coil support bar 12 is clamped in the groove 14; the diameter range of the basic support bar 5 of the adjustable die 11 meets the requirement of the inner diameter of the wound transformer coil. The number of support belts of the adjustable die 11 is equal to the number of coil support bars 12 of the transformer coil. Each basic support bar 5 on each support belt clamps a coil support bar 12, and the winding operation of the transformer coil is directly carried out.

[0040] Embodiment 2, Technical Solution 2: An adjustable die structure for winding a transformer coil, including a mandrel 1, a sliding sleeve mechanism 2, a basic support bar 5, a drive mechanism 8, and a support rod 9. A plurality of sets of sliding sleeve mechanisms 2 are uniformly arranged along the axial direction on the mandrel 1, and the drive mechanism 8 is drivingly connected to the plurality of sets of sliding sleeve mechanisms 2; each set of sliding sleeve mechanisms 2 is connected to the same basic support bar 5 through a support rod 9. The sliding sleeve mechanism 2, the support rod 9, and the basic support bar 5 together form a support belt arranged radially along the mandrel 1. A plurality of support belts are evenly distributed on the mandrel, and the whole forms a cylindrical structure, which is called an adjustable die 11; a longitudinally arranged groove 14 is provided at the top of the outermost basic support bar 5 of the cylindrical structure. The diameter range of the basic support bar 5 of the adjustable die 11 meets the requirement of the inner diameter of the wound transformer coil. The number of support belts is not equal to the number of coil support bars 12. Each basic support bar 5 on each support belt cannot correspond to the coil support bar 12 one by one. The basic support bar 5 is wrapped with hard cardboard or inserted into a cardboard tube 13. The coil support bar 12 of the transformer coil is fixed on the outside of the hard cardboard or the cardboard tube 13, and then the winding operation of the transformer coil is carried out.

[0041] Embodiment 3, Technical Solution 3: An adjustable die structure for winding a transformer coil, comprising a mandrel 1, a sliding sleeve mechanism 2, a basic support bar 5, a driving mechanism 8 and a support rod 9. A plurality of sets of sliding sleeve mechanisms 2 are uniformly arranged along the axial direction on the mandrel 1, and the driving mechanism 8 is drivingly connected to the plurality of sets of sliding sleeve mechanisms 2; each set of sliding sleeve mechanisms 2 is connected to the same basic support bar 5 through a support rod 9. The sliding sleeve mechanism 2, the support rod 9 and the basic support bar 5 together form a support belt arranged radially along the mandrel 1. A plurality of support belts are evenly distributed on the mandrel, and the whole forms a cylindrical structure, which is called an adjustable die 11; a longitudinally arranged groove 14 is provided at the top of the outermost basic support bar 5 of the cylindrical structure. The diameter range of the basic support bar 5 of the adjustable die 11 cannot meet the requirement of the inner diameter for winding the transformer coil. An auxiliary support bar 6 is clamped in the groove 14. After the auxiliary support bar 6 is clamped, the diameter range of the basic support bar 5 of the adjustable die meets the requirement of the inner diameter for winding the transformer coil. The auxiliary support bar 6 is wrapped with cardboard or a cardboard tube 13 is inserted into it. The coil support bar 12 of the transformer coil is fixed on the outside of the cardboard or the cardboard tube 13, and then the operation of winding the transformer coil is carried out.

[0042] The thickness of the auxiliary support bar 6 can be set and manufactured according to needs, and is used to supplement the diameter range of the adjustable die.

[0043] The auxiliary support bar 6 is composed of an auxiliary support bar plane 19, an auxiliary support bar slope 20 and an auxiliary support bar limit projection 21. The auxiliary support bar limit projection 21 is located at the bottom of the auxiliary support bar 6, and the width of the auxiliary support bar limit projection 21 matches the width of the groove 14 at the top of the basic support bar 5. The auxiliary support bar limit projection 21 is embedded in the groove 14; the auxiliary support bar plane 19 is located at the center of the top of the auxiliary support bar 6, and the auxiliary support bar slope 20 is around the auxiliary support bar plane 19.

[0044] A horizontally arranged auxiliary support bar lashing groove 22 is provided on the auxiliary support bar plane 19; the auxiliary support bar limit projection 21 is used to fix and limit the auxiliary support bar to be clamped in the groove 14 of the basic support bar 5. The auxiliary support bar 6 is firmly fixed to the adjustable die with an auxiliary support bar lashing band in the auxiliary support bar lashing groove 22. At the same time, because the auxiliary support bar lashing groove has a certain depth, it can effectively ensure that the auxiliary support bar lashing band does not protrude from the outer surface of the auxiliary support bar 6 and does not affect the overall outer diameter of the adjustable die.

[0045] The number of the auxiliary support bar lashing grooves 22 is 2 - 3, and they are evenly distributed along the length direction of the auxiliary support bar 6. The auxiliary support bar lashing grooves 22 cooperate with the auxiliary support bar lashing band, and the installation is simple and fast. Compared with the existing technology in which each support bar of the additional layer of the adjustable die needs to be tightened and fixed with more than eight bolts, the operation efficiency is greatly improved.

[0046] The basic support bar 5 is composed of a support bar crown 17 and a support bar bottom 18. The support bar bottom 18 is fixedly connected to the support rod 9, and the groove 14 is provided at the top of the support bar crown 17.

[0047] The width of the groove 14 matches the bottom width of the coil support bar 12.

[0048] The width of the groove 14 is a. At the same time, in order to ensure the roundness when the adjustable mold has the minimum diameter and to ensure that the coil can be smoothly wound when the adjustable mold has the minimum diameter, a plane 15 with a width of b is reserved on the support bar crown 17 outside the groove. A slope 16 is arranged outside the plane 15 to ensure that when the adjustable mold has the minimum diameter, the inner guide of the coil can be conveniently installed.

[0049] Bottom flanges 4 and top flanges 10 are respectively arranged at both ends of the mandrel 1.

[0050] A shackle 7 is arranged on the bottom flange 4.

[0051] The driving mechanism 8 is arranged at a position of the mandrel close to the bottom flange 4.

[0052] According to the inner diameter requirement of the coil drawing, select an adjustable mold with an outer diameter of the cylindrical structure matching the inner diameter requirement of the transformer coil to be wound, and install it on the winding machine; if the diameter range of the basic support bar 5 of the adjustable mold 11 meets the inner diameter requirement of the transformer coil to be wound, the number of support belts of the adjustable mold 11 is equal to the number of coil support bars 12 of the transformer coil, and each basic support bar 5 on each support belt holds one coil support bar 12, and directly carry out the winding operation of the transformer coil; if the diameter range of the basic support bar 5 of the adjustable mold 11 meets the inner diameter requirement of the transformer coil to be wound, but the number of support belts is not equal to the number of coil support bars 12, each basic support bar 5 on each support belt cannot correspond to the coil support bar 12 one by one. The basic support bar 5 is wrapped with cardboard or a cardboard tube 13 is inserted into it, and the coil support bar 12 of the transformer coil is fixed on the outside of the cardboard or the cardboard tube 13, and then the winding operation of the transformer coil is carried out; if the diameter range of the basic support bar 5 of the adjustable mold 11 does not meet the inner diameter requirement of the transformer coil to be wound, an auxiliary support bar 6 is held in the groove 14. After the auxiliary support bar 6 is held, the diameter range of the basic support bar 5 of the adjustable mold meets the inner diameter requirement of the transformer coil to be wound. The auxiliary support bar 6 is wrapped with cardboard or a cardboard tube 13 is inserted into it, and the coil support bar 12 of the transformer coil is fixed on the outside of the cardboard or the cardboard tube 13, and then the winding operation of the transformer coil is carried out.

[0053] If the number of support belts of the adjustable mold 11 is equal to the number of coil support bars 12 of the transformer coil, and each basic support bar 5 on each support belt corresponds to the coil support bar 12 one by one. Since multiple support belts arranged radially of the adjustable mold structure are evenly distributed on the mandrel, there is no need to calculate the support bar spacing, draw equal division lines on the cardboard tube, etc., and directly wind the transformer coil.

[0054] If the number of support belts of the adjustable mold 11 is not equal to the number of coil spacers 12 of the transformer coil, and the basic spacers 5 on each support belt cannot correspond one by one to the coil spacers 12, it is necessary to wrap cardboard outside the adjustable mold or insert a cardboard tube 13, evenly divide and draw lines on the outside of the cardboard or cardboard tube 13 as needed, and then fix the coil spacers 12 to start winding the transformer coil.

[0055] The adjustment of the outer diameter of the cylindrical structure is driven by the driving mechanism 8 to drive the sliding sleeve mechanism 2 to slide on the mandrel 1, and the angle between the support rod 9 and the mandrel 1 will change, so as to drive the basic spacers 5 and auxiliary spacers 6 thereon to open or contract, resulting in a change in the outer diameter of the cylindrical structure to meet the requirements of coil winding.

[0056] The bottom flower plate 4 and the top flower plate 10 are used for supporting installation with the winding machine, and the shackle 7 is used for hoisting the adjustable mold.

[0057] The driving mechanism 8 is arranged at a position of the mandrel close to the bottom flower plate 4, and the driving mechanism 8 is provided with maximum and minimum diameter limits to prevent overoperation.

[0058] The baffle 3 is a bracket for supporting the coil when used with a vertical winding machine.

[0059] The number of various spacers can be specified according to product requirements, and the spacer structure and material can be customized.

[0060] When the diameter range of the adjustable mold is insufficient, auxiliary spacers 6 can be added to expand the use range of the adjustable mold.

[0061] In the first embodiment, taking the high-voltage coil of 110 kV products as an example, the diameters of more than 80% of the products are in the range of φ900 - 1150 mm, and the number of basic spacers is 24. Therefore, the specified mold diameter range can be φ900 - 1150 mm, without additional layers, and the number of coil spacers is 24.

[0062] Combining the advantages of the iron mold, the surface of the basic spacer is provided with grooves and slopes to ensure the roundness of the mold at the minimum diameter.

[0063] The materials of various spacers are aluminum, which not only has a certain mechanical strength, but also can well ensure the processing dimensions, and does not rust, does not drop slag, and does not pollute the coil.

[0064] Figure 8Cross-sectional view of the middle base support bar. A groove 14 with a width of a and a depth of c is opened at the top of the outer cross-section of the base support bar 5 for clamping the coil support bar 12 or the additional auxiliary support bar 6. To ensure the roundness when the adjustable mold has the minimum diameter and to ensure that the coil can be smoothly wound when the diameter of the adjustable mold is the smallest, only a plane 15 with a width of b is reserved outside the groove 14, and a slope 16 is provided on the outside to ensure that the inner guide of the coil can be conveniently installed when the adjustable mold has the minimum diameter. The dimension of the groove width a should ensure that the coil support bar 12 can be smoothly inserted and effectively control the left and right positions of the coil support bar to ensure uniform spacing of the coil support bars; the dimension of the groove depth c of the groove 14 should be such that the coil support bar 12 is clamped and does not move, and at the same time does not affect the insertion of the inner guide of the coil; the dimensions of the plane b and the slope depth d are designed according to the roundness when the adjustable mold has the minimum diameter. Taking the high-voltage coil of the 110 kV product as an example, the width of the coil support bars of more than 80% of the products is 19 mm. Therefore, the groove width a of the base support bar is 19.3 mm, the groove depth c is 1.5 mm, the plane b is 5 mm, and the slope depth d is 5 mm.

[0065] Example 1. According to the inner diameter requirement of the coil drawing, an adjustable mold structure with an outer diameter of the cylindrical structure matching the inner diameter requirement of the coil is selected. The above adjustable mold structure is installed on the winding machine. The diameter of the surface of the adjustable mold cylindrical structure is adjusted to the appropriate size through the driving mechanism 8. The coil support bars 12 are placed into the grooves 14 of the base support bar 5 one by one, and then the coil winding operation can be started. This saves the operations of evenly distributing, scribing, fixing the support bars on the cardboard tube of the existing adjustable mold and adjusting the position of the coil support bars during the coil winding. At the same time, there is a large internal operation space for various binding operations during the coil winding, and the operation is convenient.

Claims

1. An adjustable mold structure for winding transformer coils, comprising a mandrel (1), a sliding sleeve mechanism (2), a basic stay (5), a driving mechanism (8) and a stay rod (9). Multiple sets of sliding sleeve mechanisms (2) are evenly arranged along the axial direction on the mandrel (1), and the driving mechanism (8) is drivingly connected to the multiple sets of sliding sleeve mechanisms (2); each set of sliding sleeve mechanisms (2) is connected to the same basic stay (5) through a stay rod (9). The sliding sleeve mechanism (2), the stay rod (9) and the basic stay (5) together form a support belt arranged radially along the mandrel (1). Multiple support belts are evenly distributed on the mandrel, and the whole forms a cylindrical structure, which is called an adjustable mold (11); it is characterized in that: At the top of the outermost basic support bar (5) of the cylindrical structure, there is a longitudinally arranged groove (14), and the coil support bar (12) is clamped in the groove (14); the diameter range of the basic support bar (5) of the adjustable mold (11) meets the requirement of the inner diameter of the transformer coil to be wound. The number of support belts of the adjustable mold (11) is equal to the number of coil support bars (12) of the transformer coil. Each basic support bar (5) on each support belt clamps one coil support bar (12), and the winding operation of the transformer coil is directly carried out.

2. The adjustable die structure for winding a transformer coil according to claim 1, wherein: The width of the groove (14) matches the bottom width of the coil support bar (12).

3. An adjustable mold structure for winding transformer coils, comprising a mandrel (1), a sliding sleeve mechanism (2), a basic stay (5), a driving mechanism (8) and a stay rod (9). A plurality of sets of sliding sleeve mechanisms (2) are uniformly arranged along the axial direction on the mandrel (1), and the driving mechanism (8) is drivingly connected to the plurality of sets of sliding sleeve mechanisms (2); each set of sliding sleeve mechanisms (2) is connected to the same basic stay (5) through a stay rod (9). The sliding sleeve mechanism (2), the stay rod (9) and the basic stay (5) together form a support belt arranged radially along the mandrel (1). A plurality of support belts are evenly distributed on the mandrel, and the whole forms a cylindrical structure, which is called an adjustable mold (11); characterized in that: At the top of the outermost basic support bar (5) of the cylindrical structure, there is a longitudinally arranged groove (14). The diameter range of the basic support bar (5) of the adjustable mold (11) meets the requirement of the inner diameter of the transformer coil to be wound. The number of support belts is not equal to the number of coil support bars (12). Each basic support bar (5) on each support belt cannot correspond to the coil support bar (12) one by one. The basic support bar (5) is wrapped with cardboard or inserted into a cardboard tube (13). The coil support bar (12) of the transformer coil is fixed on the outside of the cardboard or cardboard tube (13), and then the winding operation of the transformer coil is carried out.

4. An adjustable mold structure for winding transformer coils, comprising a mandrel (1), a sliding sleeve mechanism (2), a basic support bar (5), a driving mechanism (8) and a support rod (9). A plurality of sets of sliding sleeve mechanisms (2) are uniformly arranged along the axial direction on the mandrel (1), and the driving mechanism (8) is drivingly connected to the plurality of sets of sliding sleeve mechanisms (2); each set of sliding sleeve mechanisms (2) is connected to the same basic support bar (5) through a support rod (9). The sliding sleeve mechanism (2), the support rod (9) and the basic support bar (5) together form a support belt arranged radially along the mandrel (1). A plurality of support belts are evenly distributed on the mandrel, and the whole forms a cylindrical structure, which is called an adjustable mold (11); it is characterized in that: At the top of the outermost basic support bar (5) of the cylindrical structure, there is a longitudinally arranged groove (14). The diameter range of the basic support bar (5) of the adjustable mold (11) cannot meet the requirement of the inner diameter of the transformer coil to be wound. The auxiliary support bar (6) is clamped in the groove (14). After the auxiliary support bar (6) is clamped, the diameter range of the basic support bar (5) of the adjustable mold meets the requirement of the inner diameter of the transformer coil to be wound. The auxiliary support bar (6) is wrapped with cardboard or inserted into a cardboard tube (13). The coil support bar (12) of the transformer coil is fixed on the outside of the cardboard or cardboard tube (13), and then the winding operation of the transformer coil is carried out.

5. The adjustable die structure for winding a transformer coil according to claim 4, wherein: The auxiliary support bar (6) is composed of an auxiliary support bar plane (19), an auxiliary support bar slope (20), and an auxiliary support bar limit projection (21). The auxiliary support bar limit projection (21) is located at the bottom of the auxiliary support bar (6). The width of the auxiliary support bar limit projection (21) matches the width of the groove (14) at the top of the basic support bar (5). The auxiliary support bar limit projection (21) is embedded in the groove (14); the auxiliary support bar plane (19) is located at the top center of the auxiliary support bar (6), and the auxiliary support bar slope (20) is around the auxiliary support bar plane (19).

6. The adjustable die structure for winding a transformer coil according to claim 5, wherein: There is a transversely arranged auxiliary support bar lashing groove (22) on the auxiliary support bar plane (19); the auxiliary support bar limit projection (21) is used to fix and limit the auxiliary support bar to be clamped in the groove (14) of the basic support bar (5), and the auxiliary support bar (6) is firmly fixed to the adjustable mold with an auxiliary support bar lashing band (23) in the auxiliary support bar lashing groove (22).

7. An adjustable die structure for winding a transformer coil according to claim 6, characterized in that: The number of the auxiliary support bar lashing grooves (22) is 2 - 3, and they are evenly distributed along the length direction of the auxiliary support bar (6).

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