Lead structure suitable for oil-immersed transformer and oil-immersed transformer applying lead structure

Abstract

The utility model relates to the technical field of transformers, in particular to a lead structure suitable for an oil-immersed transformer and the oil-immersed transformer applying the lead structure. The A-phase connecting bar, the B-phase connecting bar and the zero-phase busbar are assembled together by the lead structure through the first insulating structure; and the C-phase connecting bar is assembled with the A-phase extension section and the B-phase extension section through a second insulating structure, so that the A-phase connecting bar, the B-phase connecting bar, the C-phase connecting bar and the zero-phase busbar are connected and fixed into a whole. In addition, the flexible connecting pieces are installed on the A-phase connecting bar, the B-phase connecting bar and the C-phase connecting bar in a non-detachable mode, and a complete lead structure is formed. Therefore, when the lead structure is connected with the oil-immersed transformer, a flexible connecting piece does not need to be installed independently. That is, the flexible connecting piece is installed before testing, so that the testing result is close to the actual finished product data. In addition, the technical problem that independent installation is inconvenient due to the fact that the internal space of the connecting bar assembly is small in flexible connection is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a lead wire structure suitable for an oil-immersed transformer and an oil-immersed transformer using the lead wire structure. Background Art

[0002] At present, in the production of oil-immersed transformers, before the oil-immersed transformer is dried, the winding conductive bar of the oil-immersed transformer is first connected to the connecting bar assembly. Then the three-phase coil resistance unbalance rate of the oil-immersed transformer is tested. After the test, wait for the oil-immersed transformer to dry, and then install the flexible connection independently in the connecting bar assembly. Specifically, Fig. 9 A lead structure in the prior art is shown, including a connection row assembly 901 on the left, a1 phase soft connection 902, b1 phase soft connection 903, c1 phase soft connection 904, a2 phase soft connection 905, b2 phase soft connection 906 and c2 phase soft connection 907. Before the oil-immersed transformer is dried, the winding conductive bar is first connected to the connection row assembly 901. Then the three-phase coil resistance unbalance rate of the oil-immersed transformer is tested. After the test, the oil-immersed transformer is dried, and then the a1 phase soft connection 902, b1 phase soft connection 903, c1 phase soft connection 904, a2 phase soft connection 905, b2 phase soft connection 906 and c2 phase soft connection 907 are independently installed one by one in the connection row assembly 901. Since the soft connection is installed after the test, there will be a certain deviation between the test result and the actual finished product data. In addition, when the soft connection is installed separately in the connection row assembly, it needs to be fixed with bolts, but due to the small internal space of the connection row assembly, the operation is extremely inconvenient. Utility Model Content

[0003] The main purpose of the utility model is to provide a lead structure suitable for an oil-immersed transformer and an oil-immersed transformer using the lead structure, so that when the lead structure is connected to the oil-immersed transformer, there is no need to install a soft connector separately. That is, the soft connector is installed before testing, so that the test result is close to the actual finished product data. In addition, it also overcomes the technical problem that the soft connector is inconvenient to install separately due to the small internal space of the connection row assembly.

[0004] To achieve the above-mentioned purpose, the utility model proposes a lead structure suitable for an oil-immersed transformer, the lead structure is applied to the oil-immersed transformer, the lead structure includes an A-phase connecting bar, a B-phase connecting bar, a C-phase connecting bar and a zero-phase bus; the A-phase connecting bar, the B-phase connecting bar and the zero-phase bus are fixedly connected by a first insulating structure; the A-phase connecting bar has an A-phase extension section, the A-phase extension section exceeds the zero-phase bus along the length direction, the B-phase connecting bar has a B-phase extension section, the B-phase extension section exceeds the zero-phase bus along the length direction; the A-phase extension section, the B-phase extension section and the C-phase connecting bar are fixedly connected by a second insulating structure; the A-phase extension section, the B-phase extension section and the C-phase connecting bar are respectively connected with soft connectors by welding or bonding.

[0005] Furthermore, one end of the A-phase connecting bar away from the flexible connector, one end of the B-phase connecting bar away from the flexible connector, and one end of the C-phase connecting bar away from the flexible connector are all on the same side of the zero-phase bus; and in the direction away from the flexible connector, one end of the A-phase connecting bar away from the flexible connector exceeds one end of the B-phase connecting bar away from the flexible connector, and one end of the B-phase connecting bar away from the flexible connector exceeds one end of the C-phase connecting bar away from the flexible connector.

[0006] Furthermore, on the side away from the soft connector, the section of the A-phase connecting row that exceeds the B-phase connecting row includes a sequentially connected A-phase bent section and an A-phase straight section; on the side away from the soft connector, the section of the B-phase connecting row that exceeds the C-phase connecting row includes a sequentially connected B-phase bent section and a B-phase straight section; on the side away from the soft connector, the C-phase connecting row includes a C-phase straight section; the end of the A-phase bent section away from the soft connector is arranged toward the side close to the C-phase connecting row, so that the A-phase straight section and the C-phase straight section are connected at On the same straight line; the B-phase bending section is arranged away from one end of the soft connector toward the side close to the C-phase connecting row, so that the B-phase straight section and the C-phase straight section are on the same straight line; the A-phase connecting row also includes an A-phase transition section, one end of the A-phase transition section is connected to the A-phase bending section, and the other end of the A-phase transition section is connected to the A-phase extension section; the B-phase connecting row also includes a B-phase transition section, one end of the B-phase transition section is connected to the B-phase bending section, and the other end of the B-phase transition section is connected to the B-phase extension section.

[0007] Furthermore, the A-phase connecting bar, the B-phase connecting bar and the C-phase connecting bar are sequentially distributed on one side of the zero-phase busbar from far to near.

[0008] Furthermore, the first insulating structure includes a first insulating clamp, a second insulating clamp, a first insulating stud and a first fixing nut and a second fixing nut; the first insulating clamp is arranged between the B-phase straight section and the zero-phase bus, and the second insulating clamp is arranged between the B-phase straight section and the A-phase transition section; one end of the first insulating stud is located on the side of the zero-phase bus away from the first insulating clamp, and the other end of the first insulating stud passes through the zero-phase bus, the first insulating clamp, the B-phase straight section, the second insulating clamp and the A-phase transition section in sequence; the first fixing nut is threadedly fixed to one end of the first insulating stud to abut against the zero-phase bus; the second fixing nut is threadedly fixed to the other end of the first insulating stud to abut against the A-phase transition section.

[0009] Furthermore, the second insulating structure includes a fourth insulating clamp, a fifth insulating clamp, a third insulating stud, a fifth fixing nut and a sixth fixing nut; the fourth insulating clamp is arranged between the C phase straight section and the B phase extension section, and the fifth insulating clamp is arranged between the B phase extension section and the A phase extension section; one end of the third insulating stud is located on the side of the C phase straight section away from the fourth insulating clamp, and the other end of the third insulating stud passes through the C phase straight section, the fourth insulating clamp, the B phase extension section, the fifth insulating clamp and the A phase extension section in sequence; the fifth fixing nut is threadedly fixed to one end of the third insulating stud to abut against the C phase straight section; the sixth fixing nut is threadedly fixed to the other end of the third insulating stud to abut against the A phase extension section.

[0010] Furthermore, the A-phase connecting bar, the B-phase connecting bar and the C-phase connecting bar are sequentially distributed on one side of the zero-phase busbar from near to far.

[0011] Furthermore, the first insulating structure includes a sixth insulating clamp, a seventh insulating clamp, a fourth insulating stud, a seventh fixing nut and an eighth fixing nut; the sixth insulating clamp is arranged between the B-phase straight section and the A-phase transition section, and the seventh insulating clamp is arranged between the A-phase transition section and the zero-phase bus; one end of the fourth insulating stud is located on the side of the zero-phase bus away from the seventh insulating clamp, and the other end of the fourth insulating stud passes through the zero-phase bus, the seventh insulating clamp, the A-phase transition section, the sixth insulating clamp and the B-phase straight section in sequence; the seventh fixing nut is threadedly fixed to one end of the fourth insulating stud to abut against the zero-phase bus; the eighth fixing nut is threadedly fixed to the other end of the fourth insulating stud to abut against the B-phase straight section.

[0012] Furthermore, the second insulating structure includes a ninth insulating clamp, a sixth insulating stud, an insulating layer, an eleventh fixing nut and a twelfth fixing nut; the ninth insulating clamp is arranged between the C phase straight section and the B phase extension section, the insulating layer is arranged between the B phase extension section and the A phase extension section, and the edge of the insulating layer on one side away from the flexible connector exceeds the end of the B phase transition section away from the flexible connector; one end of the sixth insulating stud is located on the side of the C phase straight section away from the ninth insulating clamp, and the other end of the sixth insulating stud passes through the C phase straight section, the ninth insulating clamp, the B phase extension section, the insulating layer and the A phase extension section in sequence; the eleventh fixing nut is threadedly fixed to one end of the sixth insulating stud to abut against the C phase straight section; the twelfth fixing nut is threadedly fixed to the other end of the sixth insulating stud to abut against the A phase extension section.

[0013] The second aspect of the utility model further discloses an oil-immersed transformer, and the oil-immersed transformer is applied with the lead structure described in the first aspect of the utility model.

[0014] The technical solution provided by the utility model may have the following beneficial effects:

[0015] In the lead structure provided by the utility model, the A-phase connecting bar, the B-phase connecting bar and the zero-phase bus are assembled together through the first insulating structure; the C-phase connecting bar is assembled together with the A-phase extension section of the A-phase connecting bar and the B-phase extension section of the B-phase connecting bar through the second insulating structure, so that the A-phase connecting bar, the B-phase connecting bar, the C-phase connecting bar and the zero-phase bus are connected and fixed into a whole. In addition, the soft connector is installed in the A-phase connecting bar, the B-phase connecting bar and the C-phase connecting bar in a non-detachable manner to form a complete lead structure. In this way, when the lead structure is connected to the oil-immersed transformer, there is no need to install the soft connector separately. That is, the soft connector is installed before the test, so that the test results are close to the actual finished product data. In addition, the technical problem that the soft connection is inconvenient to install separately due to the small internal space of the connecting bar assembly is overcome. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 This is a structural schematic diagram of Embodiment 1 of the lead structure of the utility model;

[0018] Figure 2 Schematic diagram of the structure of the A-phase connecting row and the B-phase connecting row in Example 1;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure of the middle region A;

[0020] Figure 4 for Figure 2 A schematic diagram of the structure of the middle region B;

[0021] Figure 5 It is a structural schematic diagram of Embodiment 2 of the lead structure of the utility model;

[0022] Figure 6 for Figure 4 A schematic diagram of the structure of the middle region C;

[0023] Figure 7 for Figure 4 A schematic diagram of the structure of the middle region D;

[0024] Figure 8 It is a schematic diagram of the connection between the lead structure of the utility model and the winding conductive bar;

[0025] Fig. 9 It is a structural schematic diagram of the lead structure in the background technology;

[0026] Description of the accompanying drawings: 100-A phase connecting bar, 101-A phase extension section, 102-A phase bending section, 103-A phase straight section, 104-A phase transition section, 200-B phase connecting bar, 201-B phase extension section, 202-B phase bending section, 203-B phase straight section, 204-B phase transition section, 300-C phase connecting bar, 301-C phase straight section, 400-zero phase bus, 500-first insulation structure, 501-first insulation clamp, 502-second insulation clamp, 503-first insulation stud, 504-first fixing nut, 505-second fixing nut, 506-third insulation clamp, 507-second insulation stud, 508 -third fixing nut, 509-fourth fixing nut, 510-sixth insulating clamp, 511-seventh insulating clamp, 512-fourth insulating stud, 513-seventh fixing nut, 514-eighth fixing nut, 515-eighth insulating clamp, 516-fifth insulating stud, 517-ninth fixing nut, 518-tenth fixing nut, 600-second insulating structure, 601-fourth insulating clamp, 602-fifth insulating clamp, 603-third insulating stud, 604-fifth fixing nut, 605-sixth fixing nut, 606-ninth insulating clamp, 607-sixth insulating stud, 608-insulating layer, 609-eleventh fixing nut, 610-twelfth fixing nut. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] Combine the following Figures 1 to 8 , describing a lead wire structure suitable for an oil-immersed transformer according to an embodiment of the utility model, the lead wire structure is applied to an oil-immersed transformer, and the lead wire structure includes an A-phase connecting bar 100, a B-phase connecting bar 200, a C-phase connecting bar 300, and a zero-phase bus bar 400;

[0032] The A-phase connecting bar 100, the B-phase connecting bar 200 and the zero-phase bus 400 are fixedly connected by a first insulating structure 500; the A-phase connecting bar 100 has an A-phase extension section 101, and the A-phase extension section 101 exceeds the zero-phase bus 400 along the length direction; the B-phase connecting bar 200 has a B-phase extension section 201, and the B-phase extension section 201 exceeds the zero-phase bus 400 along the length direction; the A-phase extension section 101, the B-phase extension section 201 and the C-phase connecting bar 300 are fixedly connected by a second insulating structure 600; the A-phase extension section 101, the B-phase extension section 201 and the C-phase connecting bar 300 are respectively connected with soft connectors by welding or bonding.

[0033] Specifically, the welding of the flexible connector of the A-phase extension section 101 is used as an example for explanation. The flexible connector is an aluminum sheet, and two flexible connectors are welded on the two corresponding side surfaces of the A-phase extension section 101, and the two flexible connectors extend beyond the A-phase extension section 101 in the direction away from the zero-phase busbar 400. In this way, when the flexible connector is connected to the sleeve, the sleeve can be clamped on both sides to increase the contact area. Similarly, the B-phase extension section 201 and the C-phase connecting bar 300 can both be connected to the flexible connector in this way.

[0034] In the lead structure provided by the utility model, the A-phase connecting bar 100, the B-phase connecting bar 200 and the zero-phase busbar 400 are assembled together through the first insulating structure 500; the C-phase connecting bar 300 is assembled together with the A-phase extension section 101 of the A-phase connecting bar 100 and the B-phase extension section 201 of the B-phase connecting bar 200 through the second insulating structure 600, so that the A-phase connecting bar 100, the B-phase connecting bar 200, the C-phase connecting bar 300 and the zero-phase busbar 400 are connected and fixed into a whole. In addition, the soft connector is installed in the A-phase connecting bar 100, the B-phase connecting bar and the C-phase connecting bar 300 in a non-detachable manner to form a complete lead structure. In this way, when the lead structure is connected to the oil-immersed transformer, there is no need to install the soft connector separately. That is, the soft connector is installed before the test, so that the test results are close to the actual finished product data. In addition, the technical problem that the soft connection is inconvenient to install separately due to the small internal space of the connecting bar assembly is also overcome.

[0035] Furthermore, one end of the A-phase connecting bar 100 away from the flexible connector, one end of the B-phase connecting bar 200 away from the flexible connector, and one end of the C-phase connecting bar 300 away from the flexible connector are all on the same side of the zero-phase busbar 400; and in the direction away from the flexible connector, one end of the A-phase connecting bar 100 away from the flexible connector exceeds one end of the B-phase connecting bar 200 away from the flexible connector, and one end of the B-phase connecting bar 200 away from the flexible connector exceeds one end of the C-phase connecting bar 300 away from the flexible connector. In this way, the A-phase connecting bar 100, the B-phase connecting bar 200, and the C-phase connecting bar 300 of the lead structure are arranged in sequence, so that the lead structure can be connected to the conductive bar of the winding of the oil-immersed transformer.

[0036] Further, on the side away from the soft connector, the section of the A-phase connecting bar 100 that exceeds the B-phase connecting bar 200 includes a sequentially connected A-phase bent section 102 and an A-phase straight section 103; on the side away from the soft connector, the section of the B-phase connecting bar 200 that exceeds the C-phase connecting bar 300 includes a sequentially connected B-phase bent section 202 and a B-phase straight section 203; on the side away from the soft connector, the C-phase connecting bar 300 It includes a C-phase straight section 301; the A-phase bent section 102 is arranged at one end away from the soft connector and toward a side close to the C-phase connecting bar 300, so that the A-phase straight section 103 and the C-phase straight section 301 are on the same straight line; the B-phase bent section 202 is arranged at one end away from the soft connector and toward a side close to the C-phase connecting bar 300, so that the B-phase straight section 203 and the C-phase straight section 301 are on the same straight line. The A-phase connecting bar 100 further includes an A-phase transition section 104, one end of which is connected to the A-phase bending section 102, and the other end of which is connected to the A-phase extension section 101; the B-phase connecting bar 200 further includes a B-phase transition section 204, one end of which is connected to the B-phase bending section 202, and the other end of which is connected to the B-phase extension section 201. Specifically, Figure 2 As shown, the A-phase connecting bar 100 is an integral structure, including an A-phase straight section 103, an A-phase bent section 102, an A-phase transition section 104, and an A-phase extended section 101. The B-phase connecting bar 200 is an integral structure, including a B-phase straight section 203, a B-phase bent section 202, a B-phase transition section 204, and a B-phase extended section 201.

[0037] Specifically, in the three windings of the oil-immersed transformer, each winding has two conductive bars arranged opposite to each other. When the lead structure is installed in the transformer, one winding is connected to the A-phase connecting bar 100 and the zero-phase bus bar 400, one winding is connected to the B-phase connecting bar 200 and the zero-phase bus bar 400, and one winding is connected to the C-phase connecting bar 300 and the zero-phase bus bar 400. Taking the connection of one winding to the A-phase connecting bar 100 and the zero-phase bus bar 400 as an example, one conductive bar of the winding is connected to the A-phase straight section 103 by screw fixing, and the other conductive bar of the winding is connected to the zero-phase bus bar 400 by screw fixing. Similarly, when another winding is connected to the B-phase connecting bar 200 and the zero-phase bus 400, one conductive bar of the winding is connected to the B-phase straight section 203 by means of threaded fixing, and another conductive bar of the winding is connected to the zero-phase bus 400 by means of threaded fixing; when another winding is connected to the C-phase connecting bar 300 and the zero-phase bus 400, one conductive bar of the winding is connected to the C-phase straight section 301 by means of threaded fixing, and another conductive bar of the winding is connected to the zero-phase bus 400 by means of threaded fixing.

[0038] Since the three windings of the oil-immersed transformer have the same size, the conductive bars of the three windings are arranged in two rows. Therefore, the A-phase straight line section 103, the B-phase straight line section 203 and the C-phase straight line section 301 are arranged on the same straight line to facilitate connection with the conductive bars of the corresponding windings.

[0039] Example 1

[0040] like Figure 1-4 As shown, the A-phase connecting bar 100, the B-phase connecting bar 200 and the C-phase connecting bar 300 are sequentially distributed from far to near on one side of the zero-phase busbar 400. In this way, the A-phase connecting bar 100 and the B-phase connecting bar 200 do not pass between the C-phase connecting bar 300 and the zero-phase busbar 400.

[0041] In this embodiment, the first insulating structure 500 includes a first insulating clamp 501, a second insulating clamp 502, a first insulating stud 503, a first fixing nut 504 and a second fixing nut 505; the first insulating clamp 501 is arranged between the B-phase straight section 203 and the zero-phase bus 400, and the second insulating clamp 502 is arranged between the B-phase straight section 203 and the A-phase transition section 104; one end of the first insulating stud 503 is located at the zero-phase bus 400 away from the On one side of the first insulating clamp 501, the other end of the first insulating stud 503 passes through the zero-phase bus 400, the first insulating clamp 501, the B-phase straight section 203, the second insulating clamp 502 and the A-phase transition section 104 in sequence; the first fixing nut 504 is threadedly fixed to one end of the first insulating stud 503 to abut against the zero-phase bus 400; the second fixing nut 505 is threadedly fixed to the other end of the first insulating stud 503 to abut against the A-phase transition section 104.

[0042] The zero-phase busbar 400, the first insulating clamp block 501, the B-phase straight section 203, the second insulating clamp block 502 and the A-phase transition section 104 are clamped together by the first fixing nut 504 and the second fixing nut 505, so that the A-phase connecting bar 100, the B-phase connecting bar 200 and the zero-phase busbar 400 are fixed together. Specifically, the first insulating clamp block 501 and the second insulating clamp block 502 can be wooden blocks, and the first insulating stud 503 can be a nylon screw.

[0043] Furthermore, the first insulating structure 500 also includes a third insulating clamp 506, a second insulating stud 507, a third fixing nut 508 and a fourth fixing nut 509; the third insulating clamp 506 is arranged between the A-phase straight section 103 and the zero-phase bus 400; one end of the second insulating stud 507 is located on the side of the zero-phase bus 400 away from the third insulating clamp 506, and the other end of the second insulating stud 507 passes through the zero-phase bus 400, the third insulating clamp 506 and the A-phase straight section 103 in sequence; the third fixing nut 508 is threadedly fixed to one end of the second insulating stud 507 to abut against the zero-phase bus 400; the fourth fixing nut 509 is threadedly fixed to the other end of the second insulating stud 507 to abut against the A-phase straight section 103.

[0044] The zero-phase busbar 400, the third insulating clamp 506, and the A-phase straight section 103 are clamped by the third fixing nut 508 and the fourth fixing nut 509, so that the A-phase connecting bar 100 and the zero-phase busbar 400 are fixed together. Specifically, optionally, the third insulating clamp 506 can be a wooden block, and the second insulating stud 507 can be a nylon screw. Since the length of the A-phase connecting bar 100 is large, for this reason, the present embodiment connects the A-phase straight section 103 with the zero-phase busbar 400 by the third insulating clamp 506, the second insulating stud 507, the third fixing nut 508, and the fourth fixing nut 509, so that the A-phase connecting bar 100 is fixed at two points, thereby improving the stability of the A-phase connecting bar 100.

[0045] In this embodiment, the second insulating structure 600 includes a fourth insulating clamp 601, a fifth insulating clamp 602, a third insulating stud 603, a fifth fixing nut 604 and a sixth fixing nut 605; the fourth insulating clamp 601 is arranged between the C phase straight section 301 and the B phase extension section 201, and the fifth insulating clamp 602 is arranged between the B phase extension section 201 and the A phase extension section 101; one end of the third insulating stud 603 is located in the C phase straight section 301 away from the On one side of the fourth insulating clamp 601, the other end of the third insulating stud 603 passes through the C phase straight section 301, the fourth insulating clamp 601, the B phase extension section 201, the fifth insulating clamp 602 and the A phase extension section 101 in sequence; the fifth fixing nut 604 is threadedly fixed to one end of the third insulating stud 603 to abut against the C phase straight section 301; the sixth fixing nut 605 is threadedly fixed to the other end of the third insulating stud 603 to abut against the A phase extension section 101.

[0046] The C-phase straight section 301, the fourth insulating clamp block 601, the B-phase extension section 201, the fifth insulating clamp block 602 and the A-phase extension section 101 are clamped by the fifth fixing nut 604 and the sixth fixing nut 605, so that the A-phase connecting bar 100, the B-phase connecting bar 200 and the C-phase connecting bar 300 are fixed together. Specifically, the fourth insulating clamp block 601 and the fifth insulating clamp block 602 can be wooden blocks, and the third insulating stud 603 can be a nylon screw.

[0047] Example 2

[0048] like Figure 5-7 As shown, the A-phase connecting bar 100, the B-phase connecting bar 200 and the C-phase connecting bar 300 are sequentially distributed from near to far on one side of the zero-phase busbar 400. The A-phase connecting bar 100 and the B-phase connecting bar 200 pass between the C-phase connecting bar 300 and the zero-phase busbar 400, which can reduce the width of the lead structure.

[0049] In this embodiment, the first insulating structure 500 includes a sixth insulating clamp 510, a seventh insulating clamp 511, a fourth insulating stud 512, a seventh fixing nut 513 and an eighth fixing nut 514; the sixth insulating clamp 510 is arranged between the B-phase straight section 203 and the A-phase transition section 104, and the seventh insulating clamp 511 is arranged between the A-phase transition section 104 and the zero-phase bus 400; one end of the fourth insulating stud 512 is located at the zero-phase bus 400 away from the On one side of the seventh insulating clamp 511, the other end of the fourth insulating stud 512 passes through the zero-phase bus 400, the seventh insulating clamp 511, the A-phase transition section 104, the sixth insulating clamp 510 and the B-phase straight section 203 in sequence; the seventh fixing nut 513 is threadedly fixed on one end of the fourth insulating stud 512 to abut against the zero-phase bus 400; the eighth fixing nut 514 is threadedly fixed on the other end of the fourth insulating stud 512 to abut against the B-phase straight section 203.

[0050] The zero-phase busbar 400, the seventh insulating clamp block 511, the A-phase transition section 104, the sixth insulating clamp block 510 and the B-phase straight section 203 are clamped together by the seventh fixing nut 513 and the eighth fixing nut 514, so that the A-phase connecting bar 100, the B-phase connecting bar 200 and the zero-phase busbar 400 are fixed together. Specifically, the sixth insulating clamp block 510 and the seventh insulating clamp block 511 can be wooden blocks, and the fourth insulating stud 512 can be a nylon screw.

[0051] Furthermore, the end of the A-phase transition section 104 away from the flexible connector exceeds the end of the B-phase connecting bar 200 away from the flexible connector; the first insulating structure 500 also includes an eighth insulating clamp 515, a fifth insulating stud 516, a ninth fixing nut 517 and a tenth fixing nut 518; the eighth insulating clamp 515 is arranged between the A-phase transition section 104 and the zero-phase bus 400, and is located on the side of the B-phase straight section 203 away from the flexible connector; the fifth insulating stud One end of 516 is located on the side of the zero-phase bus 400 away from the eighth insulating clamp 515, and the other end of the fifth insulating stud 516 passes through the zero-phase bus 400, the eighth insulating clamp 515 and the A-phase transition section 104 in sequence; the ninth fixing nut 517 is threadedly fixed on one end of the fifth insulating stud 516 to abut against the zero-phase bus 400; the tenth fixing nut 518 is threadedly fixed on the other end of the fifth insulating stud 516 to abut against the A-phase transition section 104.

[0052] The zero-phase busbar 400, the eighth insulating clamp 515, and the A-phase straight section 103 are clamped by the ninth fixing nut 517 and the tenth fixing nut 518, so that the A-phase connecting bar 100 and the zero-phase busbar 400 are fixed together. Specifically, optionally, the eighth insulating clamp 515 can be a wooden block, and the fifth insulating stud 516 can be a nylon screw. Since the length of the A-phase connecting bar 100 is large, for this reason, the present embodiment connects the A-phase straight section 103 with the zero-phase busbar 400 by the eighth insulating clamp 515, the fifth insulating stud 516, the ninth fixing nut 517, and the tenth fixing nut 518, so that the A-phase connecting bar 100 is fixed at two points, thereby improving the stability of the A-phase connecting bar 100.

[0053] In this embodiment, the second insulating structure 600 includes a ninth insulating clamp 606, a sixth insulating stud 607, an insulating layer 608, an eleventh fixing nut 609 and a twelfth fixing nut 610; the ninth insulating clamp 606 is arranged between the C phase straight section 301 and the B phase extension section 201, the insulating layer 608 is arranged between the B phase extension section 201 and the A phase extension section 101, and the edge of one side of the insulating layer 608 away from the flexible connector exceeds the end of the B phase transition section 204 away from the flexible connector; the sixth insulating stud 60 The first end of the sixth insulating stud 607 is located on the side of the C phase straight section 301 away from the ninth insulating clamp 606, and the other end of the sixth insulating stud 607 passes through the C phase straight section 301, the ninth insulating clamp 606, the B phase extension section 201, the insulating layer 608 and the A phase extension section 101 in sequence; the eleventh fixing nut 609 is threadedly fixed to one end of the sixth insulating stud 607 to abut against the C phase straight section 301; the twelfth fixing nut 610 is threadedly fixed to the other end of the sixth insulating stud 607 to abut against the A phase extension section 101. The eleventh fixing nut 609 and the twelfth fixing nut 610 clamp the C phase straight section 301, the ninth insulating clamp 606, the B phase extension section 201, the third insulating layer 608 and the A phase extension section 101, so that the A phase connecting bar 100, the B phase connecting bar 200 and the C phase connecting bar 300 are fixed together. Specifically, optionally, the ninth insulating clamp block 606 may be a wooden block, and the sixth insulating stud 607 may be a nylon screw. The insulating layer 608 may be an insulating paperboard.

[0054] The utility model also discloses an oil-immersed transformer, which comprises the lead wire structure.

[0055] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A lead wire structure suitable for an oil-immersed transformer, wherein the lead wire structure is applied to an oil-immersed transformer and is characterized in that: The lead structure includes an A-phase connecting bar, a B-phase connecting bar, a C-phase connecting bar and a zero-phase bus bar; The A-phase connecting bar, the B-phase connecting bar and the zero-phase bus are fixedly connected via a first insulating structure; the A-phase connecting bar has an A-phase extension section, which exceeds the zero-phase bus along the length direction, and the B-phase connecting bar has a B-phase extension section, which exceeds the zero-phase bus along the length direction; the A-phase extension section, the B-phase extension section and the C-phase connecting bar are fixedly connected via a second insulating structure; the A-phase extension section, the B-phase extension section and the C-phase connecting bar are respectively connected with soft connectors by welding or bonding.

2. The lead structure suitable for oil-immersed transformer according to claim 1, characterized in that: One end of the A-phase connecting row away from the flexible connector, one end of the B-phase connecting row away from the flexible connector, and one end of the C-phase connecting row away from the flexible connector are all on the same side of the zero-phase bus; and in the direction away from the flexible connector, one end of the A-phase connecting row away from the flexible connector exceeds one end of the B-phase connecting row away from the flexible connector, and one end of the B-phase connecting row away from the flexible connector exceeds one end of the C-phase connecting row away from the flexible connector.

3. The lead structure suitable for oil-immersed transformer according to claim 2, characterized in that: On the side away from the flexible connector, the section where the A-phase connecting row exceeds the B-phase connecting row includes a phase A bent section and a phase A straight section connected in sequence; On the side away from the flexible connector, the section of the B-phase connecting row beyond the C-phase connecting row includes a B-phase bent section and a B-phase straight section connected in sequence; On a side away from the flexible connector, the C-phase connecting bar includes a C-phase straight section; The A-phase bending section is arranged away from one end of the flexible connector toward a side close to the C-phase connecting row, so that the A-phase straight section and the C-phase straight section are on the same straight line; The B-phase bending section is arranged away from one end of the flexible connector toward a side close to the C-phase connecting row, so that the B-phase straight section and the C-phase straight section are on the same straight line; The A-phase connecting row also includes an A-phase transition section, one end of which is connected to the A-phase bending section, and the other end of which is connected to the A-phase extension section; the B-phase connecting row also includes a B-phase transition section, one end of which is connected to the B-phase bending section, and the other end of which is connected to the B-phase extension section.

4. The lead structure suitable for oil-immersed transformer according to claim 3 is characterized in that: The A-phase connecting bar, the B-phase connecting bar and the C-phase connecting bar are sequentially distributed on one side of the zero-phase busbar from far to near.

5. The lead structure suitable for oil-immersed transformer according to claim 4, characterized in that: The first insulating structure comprises a first insulating clamping block, a second insulating clamping block, a first insulating stud and a first fixing nut and a second fixing nut; The first insulating clamp block is arranged between the B-phase straight section and the zero-phase busbar, and the second insulating clamp block is arranged between the B-phase straight section and the A-phase transition section; One end of the first insulating stud is located on a side of the zero-phase busbar away from the first insulating clamping block, and the other end of the first insulating stud passes through the zero-phase busbar, the first insulating clamping block, the B-phase straight section, the second insulating clamping block and the A-phase transition section in sequence; The first fixing nut is threadedly fixed to one end of the first insulating stud to abut against the zero-phase busbar; the second fixing nut is threadedly fixed to the other end of the first insulating stud to abut against the A-phase transition section.

6. The lead structure suitable for oil-immersed transformer according to claim 4, characterized in that: The second insulating structure comprises a fourth insulating clamping block, a fifth insulating clamping block, a third insulating stud, a fifth fixing nut and a sixth fixing nut; The fourth insulating clamp is arranged between the C phase straight section and the B phase extension section, and the fifth insulating clamp is arranged between the B phase extension section and the A phase extension section; One end of the third insulating stud is located on a side of the C phase straight section away from the fourth insulating clamp block, and the other end of the third insulating stud passes through the C phase straight section, the fourth insulating clamp block, the B phase extension section, the fifth insulating clamp block and the A phase extension section in sequence; The fifth fixing nut is threadedly fixed to one end of the third insulating stud to abut against the C-phase straight section; the sixth fixing nut is threadedly fixed to the other end of the third insulating stud to abut against the A-phase extended section.

7. The lead structure suitable for oil-immersed transformer according to claim 3, characterized in that: The A-phase connecting bar, the B-phase connecting bar and the C-phase connecting bar are sequentially distributed on one side of the zero-phase busbar from near to far.

8. The lead structure suitable for oil-immersed transformer according to claim 7, characterized in that: The first insulating structure comprises a sixth insulating clamping block, a seventh insulating clamping block, a fourth insulating stud, a seventh fixing nut and an eighth fixing nut; The sixth insulating clamp is arranged between the B-phase straight section and the A-phase transition section, and the seventh insulating clamp is arranged between the A-phase transition section and the zero-phase busbar; One end of the fourth insulating stud is located on the side of the zero-phase bus away from the seventh insulating clamp, and the other end of the fourth insulating stud passes through the zero-phase bus, the seventh insulating clamp, the A-phase transition section, the sixth insulating clamp and the B-phase straight section in sequence; the seventh fixing nut is threadedly fixed to one end of the fourth insulating stud to abut against the zero-phase bus; the eighth fixing nut is threadedly fixed to the other end of the fourth insulating stud to abut against the B-phase straight section.

9. The lead structure suitable for oil-immersed transformer according to claim 7, characterized in that: The second insulating structure comprises a ninth insulating clamping block, a sixth insulating stud, an insulating layer, an eleventh fixing nut and a twelfth fixing nut; The ninth insulating clamp is arranged between the C phase straight section and the B phase extension section, the insulating layer is arranged between the B phase extension section and the A phase extension section, and the edge of one side of the insulating layer away from the flexible connector exceeds the end of the B phase transition section away from the flexible connector; One end of the sixth insulating stud is located on a side of the C phase straight section away from the ninth insulating clamping block, and the other end of the sixth insulating stud passes through the C phase straight section, the ninth insulating clamping block, the B phase extension section, the insulating layer and the A phase extension section in sequence; The eleventh fixing nut is threadedly fixed to one end of the sixth insulating stud to abut against the C-phase straight section; the twelfth fixing nut is threadedly fixed to the other end of the sixth insulating stud to abut against the A-phase extended section.

10. An oil-immersed transformer, characterized in that: The oil-immersed transformer is applied with the lead structure as claimed in any one of claims 1 to 9.

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