Three-dimensional wound core transformer body single-path fixing structure and three-dimensional wound core transformer

Abstract

The application relates to a three-dimensional wound core body single-path fixing structure and a three-dimensional wound core transformer, which comprises a support structure of a three-dimensional wound core body, the support structure comprising upper and lower clamping pieces and a plurality of connecting pieces connecting the clamping pieces; one of the connecting pieces is connected with the clamping pieces to form a conductive path, and the rest of the connecting pieces are connected with the clamping pieces by using an insulating structure, so that the connecting pieces connected in a direct connection mode form a single-path conductive path between the clamping pieces. One of the connecting pieces is connected with the upper clamping piece or the lower clamping piece without using any insulating structure, and the rest of the connecting pieces are connected with the upper clamping piece or the lower clamping piece by using an insulating structure, so that the clamping pieces have a single-path conductive path, and a closed loop circuit between the clamping pieces is avoided, the closed loop circuit is affected by leakage magnetic flux of a transformer coil and a core to generate induced current and produce stray loss.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a three-dimensional wound core single-channel fixed structure and a three-dimensional wound core transformer. Background Technology

[0002] Transformers are one of the fundamental pieces of equipment for power transmission and distribution. Three-dimensional wound core transformers, as typical energy-saving transformers, possess advantages such as perfectly symmetrical three-phase magnetic circuits, low noise, strong short-circuit withstand capability, and compact structure. Amorphous alloy three-dimensional wound core transformers, as a new development in three-dimensional wound core transformers, retain the structural advantages of conventional three-dimensional wound core transformers. Furthermore, due to the use of iron-based amorphous metals for the core, no-load losses are further reduced, resulting in superior energy-saving performance.

[0003] The leakage flux of the coils and core in a three-dimensional wound core transformer, as well as the magnetic field generated around the coil leads, induces current in the fixed structure of the three-dimensional wound core transformer with a closed-loop circuit, thus generating stray losses. Furthermore, the larger the capacity of the three-dimensional wound core transformer, the greater the leakage flux, and the larger the proportion of stray losses relative to the transformer's output power, leading to an increase in the load loss of the three-dimensional wound core transformer. Summary of the Invention

[0004] Based on this, it is necessary to provide a single-path fixing structure for a three-dimensional wound core transformer body and a three-dimensional wound core transformer to address the problem of stray losses caused by the induced current generated by the leakage flux of the coil and core of the three-dimensional wound core transformer body in the fixed structure with a closed loop.

[0005] This application provides a three-dimensional coiled iron core body single-passage fixing structure, the three-dimensional coiled iron core body single-passage fixing structure includes:

[0006] A support structure for a three-dimensional coiled iron core body, the support structure comprising: a clamp and a plurality of connecting members connecting the clamp, the clamp comprising an upper clamp and a lower clamp;

[0007] One of the connectors is connected to the clamp to form a conductive path, and the other connectors are connected to the clamp with an insulating structure so that the connectors connected with the insulating structure are insulated from the clamp, thereby forming a single conductive path between the clamps.

[0008] The connector includes a support and fasteners; the support has mounting plates at both ends parallel to the clamp, and the support is bolted through the mounting plates and through holes on the clamp to engage with the first nut.

[0009] The fastener is a screw rod with external thread on the outer periphery, one end of the fastener extends radially out of a second screw head, the fastener is sequentially threaded through the perforation on the clamp and screwed with a second nut;

[0010] The insulation structure includes an insulation sleeve and an insulation plate; the outer periphery of the bolt in the perforation portion is sleeved with an insulation sleeve, and the first nut and the clamp and the clamp and the mounting plate are provided with insulation plates;

[0011] The outer periphery of the fastener in the perforation portion is sleeved with an insulation sleeve, and the second nut and the clamp are provided with an insulation plate.

[0012] In one of the embodiments, the support is a profile structure.

[0013] In one of the embodiments, the insulation sleeve has a gap with respect to the bolt;

[0014] The insulation sleeve has a gap with respect to the fastener.

[0015] In one of the embodiments, the connecting member forming the conductive path is the fastener.

[0016] In one of the embodiments, one end of the connecting member provided with the insulation structure is provided with the insulation structure, and the other end of the connecting member is connected with the clamp to form a conductive path.

[0017] In one of the embodiments, the clamp is a profile structure extending in the same plane and having a closed shape, and the space in the middle of the clamp is used to accommodate part of the three-dimensional wound core body.

[0018] In one of the embodiments, the three-dimensional wound core body includes a three-dimensional wound core and a coil;

[0019] The three-dimensional wound core is assembled by three single-frame cores; two of the three single-frame cores are spliced together, and a core column is formed at the splicing position of each adjacent two single-frame cores; the outer periphery of the core column is provided with the coil, the outgoing lead of the coil is arranged at one end or both ends of the coil, and the outgoing lead extends towards the clamp close to the outgoing lead.

[0020] In one of the embodiments, the clamp close to the outgoing lead of the three-dimensional wound core body is made of non-magnetic steel material.

[0021] The application provides a three-dimensional wound core transformer, which includes a three-dimensional wound core body single-path fixing structure, and the three-dimensional wound core body single-path fixing structure is installed in an oil tank of the three-dimensional wound core transformer.

[0022] The above-mentioned single-path fixing structure of the three-dimensional wound core body and the three-dimensional wound core transformer do not use any insulation structure for one of the connecting pieces to connect with the upper clamp or the lower clamp, and the other connecting pieces are connected with the upper clamp or the lower clamp through the insulation structure, so that the clamp has a single-path conductive path, and the clamp has a multi-path conductive path to form a closed loop circuit, which will be affected by the leakage magnetic of the transformer coil and the core to generate induced current and produce stray loss. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Structure diagram of the single-path fixing structure of the three-dimensional wound core body according to an embodiment of the present application;

[0024] Figure 2 Structure diagram of the single-path fixing structure of the three-dimensional wound core body according to an embodiment of the present application from the top view;

[0025] Figure 3 Structure diagram of the insulation structure at the support piece in the single-path fixing structure of the three-dimensional wound core body according to an embodiment of the present application;

[0026] Figure 4 Structure diagram of the single-path fixing structure of the three-dimensional wound core body according to an embodiment of the present application; Figure 1 Enlarged diagram of A in FIG. 5;

[0027] In the figure: 11-upper clamp; 12-lower clamp; 13-support piece; 131-mounting plate; 132-screw; 1321-first screw rod; 1322-first screw head; 134-first nut; 1341-first nut A; 1342-first nut B; 136-rigid plate; 14-fastener; 141-second screw rod; 142-second screw head; 143-second nut; 1431-second nut A; 1432-second nut B; 20-three-dimensional wound core; 21-core column; 30-coil; 51-insulating sleeve; 52-insulating plate. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0029] In the description of the application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0030] In addition, the terms "second", "first" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "second", "first" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise explicitly specified and limited, the second feature "on" or "under" the first feature can be that the second and first features are in direct contact, or the second and first features are in indirect contact through an intermediate medium. Moreover, the second feature "above", "over" and "on" the first feature can be that the second feature is directly above or obliquely above the first feature, or only indicates that the second feature is higher in horizontal height than the first feature. The second feature "below", "under" and "under" the first feature can be that the second feature is directly below or obliquely below the first feature, or only indicates that the second feature is lower in horizontal height than the first feature.

[0033] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will be understood that, although the terms "first", "second", etc. can be used herein to describe various elements, these elements should not be limited by these terms since such elements are commonly known by other terms.

[0034] Referring to Figure 1 , Figure 1 Fig. 1 shows a structure diagram of a single-path fixing structure of a three-dimensional wound core body according to an embodiment of the present application. The single-path fixing structure of the three-dimensional wound core body according to the embodiment of the present application comprises a support structure in a frame structure and a three-dimensional wound core 20 installed in the support structure. The support structure comprises an upper clamp 11, a lower clamp 12 and a connecting piece for connecting the upper clamp 11 and the lower clamp 12. The upper clamp 11 and the lower clamp 12 are main bodies of the support structure of the three-dimensional wound core body. The upper clamp 11 and the lower clamp 12 are profile structures extending in the same horizontal plane and having a closed shape. The space in the middle of the upper clamp 11 and the lower clamp 12 is used to accommodate part of the three-dimensional wound core body. The horizontal plane projections of the upper clamp 11 and the lower clamp 12 overlap. The materials of the upper clamp 11, the lower clamp 12 and the connecting piece are rigid materials with good electrical conductivity. Optionally, in the embodiment, the materials of the upper clamp 11, the lower clamp 12 and the connecting piece are steel materials. The connecting piece comprises a support piece 13 and a fastener 14. The support piece 13 extends in the vertical direction. The space between the upper clamp 11 and the lower clamp 12 is used to accommodate the three-dimensional wound core 20, and the support piece 13 supports the upper clamp 11. The connecting sections of the upper clamp 11 and the lower clamp 12 between adjacent support pieces 13 are also provided with the fastener 14 for connecting the upper clamp 11 and the lower clamp 12. The fastener 14 is a screw rod with a screw head. The fastener 14 passes through the upper clamp 11 and the lower clamp 12 from top to bottom and is screwed with a nut. The fastener 14 has a fastening force towards the center of the support structure at both ends after being fastened by the screw head, so as to fasten the support structure.

[0035] In combination with Figure 2 shown, Figure 2Fig. 1 shows a structure schematic diagram of a top view of a single-path fixing structure of a three-dimensional wound core body in an embodiment of the present application, wherein the three-dimensional wound core 20 is assembled by three single-frame cores. The single-frame core is a rectangular frame structure with arc-shaped corners, and includes a column part with a longer longitudinal length and a yoke part with a shorter transverse length, and the column part has a semicircular cross section. The column parts of two adjacent single-frame cores form a core column 21, and the core column 21 has a circular cross section. The coil 30 is arranged around the outer periphery of the core column 21, and the outgoing lead of the coil 30 is arranged at the upper end of the coil 30 and extends towards the upper clamp 11. Alternatively, in the embodiment, the outgoing lead of the coil 30 is arranged at the lower end of the coil 30 and extends towards the lower clamp 12 according to actual conditions, which is not limited herein. The upper clamp 11 and the lower clamp 12 clamp the coil 30, and the three-dimensional wound core 20 is suspended on the coil 30, so that the three-dimensional wound core body is installed in the support structure. As shown in Fig. 2, the radial cross section of the three core columns 21 is triangularly arranged in the support structure, and the shapes of the upper clamp 11 and the lower clamp 12 are triangular structures similar to the three-dimensional wound core 20 to cover the horizontal projection surface of the three-dimensional wound core 20. The three support members 13 are respectively connected to three corresponding corners of the upper clamp 11 and the lower clamp 12. The support member 13 is connected and installed to the upper clamp 11 through an insulating structure. The support member 13 is fixedly connected to the lower clamp 12, so that a conductive path is formed between the support member 13 and the lower clamp 12. Alternatively, in the embodiment, the support member 13 is fixedly connected to the lower clamp 12 by welding, and other connection methods such as bolt connection can be used according to actual conditions, which is not limited herein. Alternatively, in the embodiment, the support member 13 is a profile structure, and other structures such as plate-shaped and column-shaped structures can be used according to actual conditions, which is not limited herein. Figure 2

[0036] As shown in Fig. 1, Figure 3 Figure 3 ​​The structure diagram of the insulation structure at the support 13 in the single-path fixing structure of the three-dimensional core body of the present application is shown. The upper end of the support 13 is connected and installed with the upper clamp 11 through the insulation structure. The insulation structure includes an insulation sleeve 51 and an insulation plate 52. The materials of the insulation sleeve 51 and the insulation plate 52 are insulation materials. The insulation sleeve 51 is a hollow cylindrical structure. The upper end of the support 13 has a horizontally extending installation plate 131 which is an integral structure with the support 13. The installation plate 131 is parallel to the upper clamp 11. At least one bolt 132 is screwed with a first nut 134 in sequence through the perforations on the installation plate 131 and the upper clamp 11. The bolt 132 includes a first screw rod 1321 and a first screw head 1322. The first screw head 1322 is arranged at the lower end of the first screw rod 1321 and extends radially so that the diameter of the first screw head 1322 is larger than that of the first screw rod 1321. The first screw head 1322 functions as a limiting part when the first screw rod 1321 passes through the perforation. The diameters of the perforations on the installation plate 131 and the upper clamp 11 are larger than that of the first screw rod 1321. The outer periphery of the part of the first screw rod 1321 in the perforation is sleeved with the insulation sleeve 51. The insulation sleeve 51 is arranged in the gap between the first screw rod 1321 and the perforations of the installation plate 131 and the upper clamp 11. The insulation sleeve 51 avoids the first screw rod 1321 from abutting against the upper clamp 11 and the installation plate 131 to form a conductive path between the upper clamp 11 and the support 13. The insulation plate 52 is arranged between the upper clamp 11 and the installation plate 131. The insulation plate 52 avoids the upper clamp 11 and the installation plate 131 from abutting against each other to form a conductive path. The insulation plate 52 is also arranged between the first nut 134 and the upper end surface of the upper clamp 11. The insulation plate 52 avoids the first nut 134 from abutting against the upper clamp 11 to form a conductive path between the upper clamp 11 and the support 13. A rigid plate 136 made of rigid material is also arranged between the first nut 134 and the insulation plate 52. The rigid plate 136 increases the contact area between the first nut 134 and the insulation layer, reduces the pressure received by the upper clamp 11, prevents the first screw head 1322 and the first screw rod 1321 from loosening, and avoids the insulation plate 52 from being damaged during the screwing of the first screw head 1322 and the first screw rod 1321. A rigid plate 136 is also arranged between the installation plate 131 and the first screw head 1322 of the screw rod. The rigid plate 136 increases the contact area between the first screw head 1322 and the installation plate 131, reduces the pressure received by the installation plate 131, prevents the first screw head 1322 and the first screw rod 1321 from loosening, and avoids the installation plate 131 from being damaged during the screwing of the first screw head 1322 and the first screw rod 1321.Specifically, the bolt 132 is screwed with the first nut 134 after passing through the perforations on the rigid plate 136, the mounting plate 131, the insulation plate 52, the upper clamp 11, the insulation plate 52 and the rigid plate 136 in sequence, and the first screw rod 1321 of the bolt 132 is sleeved with the insulation sleeve 51 around the outer periphery of the portion of the mounting plate 131, the insulation plate 52, the upper clamp 11 and the insulation plate 52, so as to avoid the formation of a conductive path between the upper clamp 11 and the support 13, and the insulation structure plays an insulating role between the upper clamp 11 and the support 13. Further, the outer diameter of the insulation sleeve 51 is greater than the diameter of the first screw rod 1321, so that there is a gap between the insulation sleeve 51 and the first screw rod 1321. When the three-dimensional wound core device single-path fixing structure of the application is installed in the oil tank of the three-dimensional wound core transformer, the transformer oil can be filled in the above-mentioned gap, so that the three-dimensional wound core device single-path fixing structure of the application has a good oil gap separation structure, and the coil 30 has higher voltage resistance. Further, the rigid plate 136 is made of a rigid material with excellent conductivity, preferably non-magnetic steel, so that the first screw head 1322 of the bolt 132 abuts against the rigid plate 136 to form a conductive path, avoiding the bolt 132 from being isolated from all conductive paths in the external environment to form a suspended potential, thereby causing spark discharge to cause failure of the three-dimensional wound core transformer, and in severe cases, causing damage to the three-dimensional wound core transformer. Alternatively, in the embodiment, the insulation structure is arranged at the connection position between the support 13 and the upper clamp 11, and the insulation structure can also be arranged at the connection position between the support 13 and the lower clamp 12 according to actual conditions, so as to insulate the support 13 from the lower clamp 12, and the support 13 has a conductive path from the upper clamp 11, which is not limited herein. Alternatively, in the embodiment, the support 13 and the upper clamp 11 are connected and installed by using two bolts 132, and a single bolt 132 or more than two bolts 132 can also be used according to actual conditions, which is not limited herein.

[0037] As Figure 4 shown, Figure 4 for Figure 1An enlarged schematic view of the middle A, i.e. a schematic view of the structure of the insulation structure at the fastener 14. The insulation structure comprises an insulation sleeve 51 and an insulation plate 52. The fastener 14 comprises a second screw rod 141 with external threads on the outer periphery and a second screw head 142 extending radially at the upper end of the second screw rod 141. The second screw rod 141 is in turn threaded through the perforations in the upper clamp 11 and the lower clamp 12 and is screwed with a second nut 143. The diameter of the second screw head 142 is greater than the hole diameter of the perforations, so as to limit the fastener 14. The part of the outer periphery of the second screw rod 141 that passes through the lower clamp 12 is sleeved with the insulation sleeve 51. The insulation sleeve 51 prevents the second screw rod 141 from abutting against the lower clamp 12 to form a conductive path between the upper clamp 11 and the lower clamp 12. The insulation plate 52 is provided between the second nut 143 and the lower end surface of the lower clamp 12. The insulation plate 52 is a plate structure, and the upper and lower side surfaces thereof abut against the lower end surface of the lower clamp 12 and the second nut 143, respectively. The second screw rod 141 passes through the perforations in the insulation plate 52 and is screwed with the second nut 143. The insulation plate 52 prevents the second nut 143 from abutting against the lower clamp 12 to form a conductive path between the upper clamp 11 and the lower clamp 12. The fastener 14 is insulated from the lower clamp 12 only at the end connected to the lower clamp 12. The upper end of the fastener 14 still has a conductive path by abutting against the upper clamp 11 through the second screw head 142, so as to avoid the fastener 14 from being isolated from all conductive paths in the external environment to form a floating potential, which may cause spark discharge and lead to failure of the three-dimensional wound core transformer, and in severe cases, damage to the three-dimensional wound core transformer. Further, the inner diameter of the insulation sleeve 51 is greater than the diameter of the second screw rod 141, so that there is a gap between the insulation sleeve 51 and the second screw rod 141. When the three-dimensional wound core body single-path fixing structure of the present application is installed in the oil tank of the three-dimensional wound core transformer, the transformer oil can be filled in the above-mentioned gap, so that the three-dimensional wound core body single-path fixing structure of the present application has a good oil gap separation structure, and the coil 30 has higher voltage resistance. Alternatively, in the present embodiment, the insulation structure is arranged at the connection position between the fastener 14 and the lower clamp 12. According to actual conditions, the insulation structure can also be arranged at the connection position between the fastener 14 and the upper clamp 11, so as to insulate the fastener 14 from the upper clamp 11 and have a conductive path between the fastener 14 and the lower clamp 12. This is not limited herein.

[0038] Specifically, only one of the connecting pieces is not connected to the upper clamp 11 or the lower clamp 12 by any insulation structure, and the other connecting pieces are connected to the upper clamp 11 or the lower clamp 12 by insulation structures, so that the upper clamp 11 and the lower clamp 12 have a single-path conductive path therebetween, avoiding the upper clamp 11 and the lower clamp 12 having a multi-path conductive path therebetween to form a closed loop circuit between the upper clamp 11 and the lower clamp 12, which is affected by the leakage magnetic field of the transformer coil 30 and the core itself to form an induced current, thereby generating stray loss. Alternatively, in the present embodiment, the connecting piece as the single-path conductive path is the fastener 14, and the connecting piece as the single-path conductive path can also be provided as the support piece 13 according to actual conditions. Alternatively, in the scheme of taking one fastener 14 as the single-path conductive path, the connection of the fastener 14 to the upper clamp 11 and the lower clamp 12 is detachable, and the fastener 14 as the single-path conductive path only needs to be screwed with the second screw head 142 to complete the installation, which is simple and convenient to operate. Alternatively, in the scheme of taking one support piece 13 as the single-path conductive path, in order to maintain the parallelism between the upper clamp 11 and the lower clamp 12, the support piece 13 without the insulation plate 52 in the insulation structure needs to be lengthened, that is, a plurality of sizes of the support piece 13 are required during installation, which greatly increases the production cost compared with the scheme of taking one fastener 14 as the single-path conductive path. In summary, the scheme of taking one fastener 14 as the single-path conductive path is the preferred scheme.

[0039] Further, the upper clamp 11 is made of non-magnetic steel. In the present embodiment, the outgoing direction of the outgoing lead of the coil 30 is upward and passes through the upper clamp 11, and the outgoing lead is covered with a dense magnetic field due to the passage of high-voltage current. The upper clamp 11 itself has a loop, and if the upper clamp 11 has magnetism, it will be affected by the magnetic field of the outer periphery of the outgoing lead to form a current, causing stray loss. The upper clamp 11 made of non-magnetic steel avoids this situation, further reducing the stray loss of the three-dimensional volume core body single-path fixing structure of the present application. Alternatively, in the present embodiment, the upper clamp 11 is made of non-magnetic steel, and according to actual conditions, if the outgoing direction of the outgoing lead is downward, the lower clamp 12 is made of non-magnetic steel, or if the upper clamp 11 and the lower clamp 12 are both covered with a dense magnetic field, the upper clamp 11 and the lower clamp 12 are both made of non-magnetic steel to produce better results, which is not limited herein.

[0040] Further, the first nut 134 includes a first nut A 1341 and a first nut B 1342, a double nut structure to strengthen the fastening effect of the bolt 132. The first nut 134 is further provided with a first washer, an upper end surface of the first washer abutting against the rigid plate 136, and a lower end surface of the first washer abutting against the first nut 134. The first washer expands the contact area of the first nut 134 and the rigid plate 136, reduces the pressure received by the rigid plate 136, and further fastens the screwing of the first nut 134 and the bolt 132 through the friction force between the first washer and the rigid plate 136. Further, the external thread of the bolt 132 is a Tang's thread to which a right-handed nut and a left-handed nut can be screwed, and the internal threads of the first nut A 1341 and the first nut B 1342 have opposite rotation directions. When the first nut A 1341 rotates due to the vibration generated by the operation of the three-dimensional wound core 20, the first nut B 1342, which abuts against the first nut A 1341 and has opposite thread directions, rotates in the same direction due to the force of the first nut A 1341 and further fastens the first nut A 1341.

[0041] Further, the second nut 143 includes a second nut A 1431 and a second nut B 1432, a double nut structure to strengthen the fastening effect of the fastening member 14. The second nut 143 is further provided with a second washer, an upper end surface of the second washer abutting against the insulating plate 52, and a lower end surface of the second washer abutting against the second nut 143. The second washer expands the contact area of the second nut 143 and the insulating plate 52, reduces the pressure received by the insulating plate 52, and avoids damage to the insulating plate 52 during the screwing of the second nut 143 and the fastening member 14. Further, the external thread of the fastening member 14 is a Tang's thread to which a right-handed nut and a left-handed nut can be screwed, and the internal threads of the second nut A 1431 and the second nut B 1432 have opposite rotation directions. When the second nut A 1431 rotates due to the vibration generated by the operation of the three-dimensional wound core 20, the second nut B 1432, which abuts against the second nut A 1431 and has opposite thread directions, rotates in the same direction due to the force of the second nut A 1431 and further fastens the second nut A 1431.

[0042] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations are described, and it is understood that the scope of the present specification includes all possible combinations.

[0043] The above described embodiments only express several embodiments of the present application, which are described in more detail and in more detail, but cannot be understood as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application patent should be subject to the appended claims.

Claims

1. A three-dimensional wound iron core body single-channel fixing structure, characterized in that, The single-path fixing structure of the three-dimensional wound core body comprises: The support structure of the three-dimensional wound core body comprises: clamps and connecting pieces connected to the clamps, wherein the clamps comprise upper and lower clamps; One of the connecting pieces is connected to the clamps to form a conductive path, and the other connecting pieces are connected to the clamps by an insulating structure to insulate the connecting pieces connected to the clamps by the insulating structure, so that the connecting pieces connected to the clamps by a direct connection method form a single-path conductive path between the clamps; The connecting pieces comprise support pieces and fasteners; both ends of the support pieces are provided with mounting plates parallel to the clamps, and the support pieces are sequentially screwed to first nuts through bolts passing through perforations on the clamps and the mounting plates; The fasteners are threaded rods with external threads on the outer periphery, and one end of each fastener extends radially to form a second nut; the fasteners are sequentially screwed to second nuts through perforations on the clamps; The insulating structure comprises an insulating sleeve and an insulating plate; the bolts are provided with insulating sleeves on the outer periphery of the perforations, the first nuts and the clamps are provided with insulating plates, and the connecting pieces provided with the insulating structure are provided with the insulating structure at one end, and the other end of the connecting pieces is connected to the clamps to form a conductive path; The fasteners are provided with insulating sleeves on the outer periphery of the perforations, the second nuts and the clamps are provided with insulating plates, and the first nuts and the insulating plates are further provided with rigid plates.

2. The three-dimensional wound core body single-pass fixing structure according to claim 1, characterized by The insulating sleeve has a gap with the bolt; The insulating sleeve has a gap with the fastener.

3. The three-dimensional wound core body single pass fixing structure according to claim 1, characterized by The connecting piece forming the conductive path is the fastener.

4. The three-dimensional wound core body single pass fixing structure according to claim 1, characterized by The clamps are in the same plane and have a closed shape, and the space in the middle of the clamps is used to accommodate part of the three-dimensional wound core body.

5. The three-dimensional wound core body single pass fixing structure according to claim 1, characterized by The three-dimensional wound core body comprises a three-dimensional wound core and a coil; The three-dimensional wound core is assembled by three single-frame cores; two of the three single-frame cores are spliced together, and a core column is formed at the splicing position of each adjacent two single-frame cores; the core column is provided with the coil around the outer periphery, the outgoing lead of the coil is arranged at one end or both ends of the coil, and the outgoing lead extends towards a clamp close to the outgoing lead.

6. The three-dimensional wound core body single pass fixing structure according to claim 5, wherein The material of the clamp close to the outgoing lead of the three-dimensional wound core body is non-magnetic steel.

7. A three-dimensional wound core transformer, characterized by The single-path fixing structure of the three-dimensional wound core body is installed in the oil tank of the three-dimensional wound core transformer.

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