Low-voltage outlet head connecting structure of transformer

Abstract

The utility model discloses a transformer low-voltage outlet head connecting structure, which comprises a double-cake type low-voltage burning group, a vertical copper bar, a cold-pressed terminal and a fastening device, the double-cake type low-voltage burning group consists of a plurality of wire cakes wound on an iron core, a plurality of low-voltage outlet heads are led out from the wire cakes of which the head ends are positioned in the same column, and the cold-pressed terminal is arranged on the vertical copper bar. Wherein N continuously arranged low-voltage outlet heads are connected with a cold-pressed terminal, N is greater than or equal to 2, a plurality of mounting holes are formed in the vertical copper bar at equal intervals in the length direction of the vertical copper bar, and each cold-pressed terminal is connected with the vertical copper bar through one mounting hole and a fastening device, so that the number of the cold-pressed terminals required for connecting the low-voltage winding of the transformer with the vertical copper bar is greatly reduced; the technical problems that in the prior art, when a low-voltage outlet head of a transformer is connected with a vertical copper bar through a cold-pressed terminal, the number and specification of needed cold-pressed terminals are too large, so that installation, purchase and management of the cold-pressed terminals are difficult, and due to the fact that the multiple cold-pressed terminals need to be connected with the vertical copper bar, needed fixing bolts are many, labor intensity is large, and efficiency is not high are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer equipment, and particularly relates to a transformer low-voltage outlet connection structure. Background Art

[0002] High-power rectifier equipment is widely used in various fields such as electrochemistry, aluminum electrolysis, graphite carbon, non-ferrous metal smelting, etc. Rectifier transformer is one of the most important equipment in high-power rectifier equipment. This type of rectifier transformer generally has a common feature, that is, the secondary current is usually relatively large, so its low-voltage winding is usually designed as a double-pancake structure, and each phase must lead to multiple low-voltage outlets. These low-voltage outlets are connected to the vertical copper busbar through cold-pressed terminals. At present, there are usually two ways to connect the low-voltage outlets to the vertical copper busbar through cold-pressed terminals:

[0003] The first connection method is: each low-voltage outlet of the transformer is connected to a cold-pressed terminal, and the cold-pressed terminal is connected to the vertical copper busbar. This connection method is mainly used when the number of low-voltage outlets in parallel is not more than 5;

[0004] The second connection method is: each low-voltage outlet of the transformer is divided into two groups, which are then connected to two cold-pressure terminals respectively, and the two cold-pressure terminals are then connected to the vertical copper busbar. This connection method is mainly for the situation where the number of low-voltage outlets in parallel is 6 or more.

[0005] Both of the above connection methods cannot avoid the problem that when there are many low-voltage outlets, different numbers of parallel wires, different wire specifications, etc., the number and specifications of the required cold-pressed terminals are too large, which leads to difficulties in installation, procurement and management. In addition, because multiple cold-pressed terminals are required to connect with the vertical copper busbars, many fixing bolts are required, the labor intensity is high, and the efficiency is low. This runs counter to the purpose of transformer manufacturers to reduce costs and increase efficiency. Utility Model Content

[0006] The purpose of the utility model is to provide a transformer low-voltage outlet connection structure, so as to overcome the technical problems in the prior art that when the transformer low-voltage outlet is connected to the vertical copper busbar through the cold-pressed terminal, the number and specifications of the cold-pressed terminals are too many, which leads to difficulties in the installation, procurement and management of the cold-pressed terminals, and the need to connect multiple cold-pressed terminals to the vertical copper busbar, resulting in many fixing bolts, high labor intensity and low efficiency. The specific technical solution is as follows:

[0007] A transformer low-voltage outlet connection structure, comprising:

[0008] A vertical copper bar has a plurality of mounting holes equidistantly arranged along its length;

[0009] A double-pancake low-pressure sintering group includes a plurality of coils and an iron core, wherein the coils are wound on the iron core and arranged along the axial direction of the iron core, and a low-pressure outlet is led out from the coils at the head end and located in the same row;

[0010] N low-voltage outlets arranged continuously along the axial direction of the core are connected together by a cold-pressed terminal, wherein N is not less than two;

[0011] The cold-pressed terminal is mounted on the mounting hole through a fastening device.

[0012] Preferably, the cold-pressed terminal comprises a clamping end and a connecting end, and the clamping end and the connecting end are an integrated structure;

[0013] The clamping end comprises a main body, a first clamping structure and a second clamping structure, wherein the first clamping structure and the second clamping structure are mounted on the main body, and a threading hole is provided on the other end of the main body;

[0014] The connecting end is provided with a connecting hole.

[0015] Preferably, the first clamping structure comprises two overlapping first clamping bent plates, and anti-slip grooves are provided on the inner side surfaces of the first clamping bent plates.

[0016] Preferably, the second pressing structure comprises two overlapping second pressing bent plates, and anti-slip grooves are provided on the inner side surfaces of the second pressing bent plates.

[0017] Preferably, a plurality of the threading holes are arranged at equal intervals along the width direction of the main body, and each of the threading holes is used for one of the low-voltage outlets to pass through for connection.

[0018] Preferably, the mounting hole and the connecting hole are used in conjunction with each other;

[0019] The plurality of mounting holes are distributed at equal intervals along the width direction of the vertical copper busbar;

[0020] A plurality of the connection holes are distributed at equal intervals along a direction from the clamping end to the connection end. When the cold-pressed terminal and the vertical copper busbar are connected, the connection holes correspond to the mounting holes.

[0021] Preferably, one of the mounting holes is configured as a long hole structure;

[0022] When the cold-pressed terminal is connected to the vertical copper busbar, the mounting hole of the long hole structure corresponds to the connecting hole far away from the clamping end.

[0023] Preferably, the fastening device comprises a bolt and a nut, the screw rod of the bolt passes through the mounting hole and the connecting hole in sequence, the nut is threadedly connected to the bolt, and the heads of the nut and the bolt are respectively located on both sides of the vertical copper busbar.

[0024] Preferably, the cold-pressed terminal and the low-voltage outlet are both made of metallic copper.

[0025] Compared with the existing technology, the utility model has the following beneficial effects:

[0026] The utility model provides a transformer low-voltage outlet connection structure, which leads out a low-voltage outlet on a coil located in the same row at the head end of a low-voltage burning group, and connects N low-voltage outlets arranged along the axial direction of the iron core in parallel to the same cold-pressed terminal. This operation can greatly reduce the number of cold-pressed terminals required when the low-voltage burning group on the transformer is connected to the vertical copper busbar, and solves the technical problems in the prior art that the low-voltage outlet needs to be connected to the vertical copper busbar through a 1:1 number of cold-pressed terminals, which leads to difficulties in installation, procurement and management of the cold-pressed terminals, and the need to connect multiple cold-pressed terminals leads to many fixing bolts, high labor intensity and low efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following will briefly introduce the drawings required for the description of the embodiment. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0029] Figure 2 It is a structural schematic diagram of a double-cake low-pressure sintering group in the utility model.

[0030] Figure 3 It is a structural schematic diagram of the cold pressing terminal in the utility model.

[0031] Figure 4 It is a structural schematic diagram of the neutral copper busbar of the utility model.

[0032] Description of main reference numerals:

[0033] 1- low voltage winding, 2- vertical copper bar, 3- cold pressing terminal, 4- wire cake, 5- low voltage outlet, 6- mounting hole, 7- clamping end, 8- connecting end, 9- main body, 10- first clamping structure, 11- second clamping structure, 12- threading hole, 13- connecting hole, 14- first clamping bent plate, 15- second clamping bent plate, 16- bolt, 17- nut. DETAILED DESCRIPTION

[0034] 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 in 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.

[0035] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0038] Example

[0039] like Figures 1 to 4As shown, an embodiment of the present application provides a transformer low-voltage outlet connection structure, including a double-cake low-voltage sintering group 1, a vertical copper bar 2, a plurality of cold-pressed terminals 3 and a fastening device, wherein the double-cake low-voltage sintering group 1 is composed of a plurality of coils 4 arranged and wound along the axial direction of an iron core, wherein the iron core is not shown in the figure, a low-voltage outlet 5 is led out from the coils 4 whose head ends are located in the same row, N low-voltage outlets 5 arranged continuously along the axial direction of the iron core are connected to one end of a cold-pressed terminal 3, wherein N ≥ 2, the vertical copper bar 2 is provided with mounting holes 6 distributed at equal intervals along its length direction, and the cold-pressed terminal 3 is mounted on the mounting hole 6 by a fastening device.

[0040] Wherein, N can be 2, 3, 4 or a larger natural number, such as Figure 1 As shown, it is a schematic diagram of the structure of the utility model when N=3, indicating that the low-voltage outlets 5 are all provided on the 12 coils 4 whose head ends are located in the same a1 column, and 3 of the low-voltage outlets 5 arranged continuously along the axial direction of the iron core are connected to one end of a cold-pressed terminal 3, and a total of 4 cold-pressed terminals 3 are required.

[0041] Specifically, the cold-pressed terminal 3 includes a clamping end 7 and a connecting end 8 connected to each other, the clamping end 7 and the connecting end 8 are an integrated structure, the clamping end 7 includes a main body 9, a first clamping structure 10 and a second clamping structure 11, the first clamping structure 10 and the second clamping structure 11 are respectively connected to the front and rear ends of the main body 9, the first clamping structure 10 includes two first clamping bent plates 14 relatively connected to the front ends of the main body 9, one of which is located between the other first clamping bent plate 14 and the main body 9, and the first clamping bent plate 14 close to the main body 9 is provided with anti-slip grooves on the side facing the main body 9 and the front end surface of the main body 9, the second clamping structure 11 includes two second clamping bent plates 15 relatively connected to the rear ends of the main body 9, one of which is The second clamping bent plate 15 is located between the other second clamping bent plate 15 and the main body 9. The second clamping bent plate 15 close to the main body 9 is provided with anti-slip grooves on the side facing the main body 9 and the rear end surface of the main body 9. The side of the main body 9 close to the connecting end 8 is also provided with a threading hole 12, and the connecting end 8 is provided with a connecting hole 13. The cold-pressed terminal 3 is connected to the vertical copper bus 2 through the mounting hole 6, the connecting hole 13 and the fastening device. The fastening device includes a bolt 16 and a nut 17. The screw of the bolt 16 passes through the mounting hole 6 and the connecting hole 13 in turn. The nut 17 is threadedly connected to the bolt 16, and the head of the nut 17 and the bolt 16 are respectively located on both sides of the vertical copper bus 2. The cold-pressed terminal 3 and the low-voltage outlet 5 are made of metallic copper.

[0042] Among them, Figure 2 For example, the head ends of the several wire coils 4 of the double-cake type low-pressure sintering group 1 are divided into a1, a2, x1 and x2 columns, and a low-voltage outlet 5 is arranged on the several wire coils 4 whose head ends are located in the same a1 column, the same a2 column, the same x1 column or the same x2 column. When in use, the several low-voltage outlets 5 pass through the accommodating cavity between the first clamping structure 10 and the front end face of the main body 9, and then pass through the threading hole 12 to enter the accommodating cavity between the second clamping structure 11 and the rear end face of the main body 9. The first clamping structure 10 and the second clamping structure 11 are clamped by a wire crimping pliers to fix the low-voltage outlet 5, thereby effectively improving the connection stability between the low-voltage outlet 5 and the cold-pressed terminal 3.

[0043] Preferably, a plurality of the threading holes 12 are provided, and the plurality of the threading holes 12 are arranged at equal intervals along the width direction of the main body 9, and each of the threading holes 12 is for a low-voltage outlet 5 to pass through, thereby improving the neatness and aesthetics of the connection between the low-voltage outlet 5 and the cold-pressed terminal 3 and facilitating the connection.

[0044] Preferably, there are two mounting holes 6 and two connecting holes 13, and the two mounting holes 6 are evenly spaced along the width direction of the vertical copper busbar 2, and the two connecting holes 13 are evenly spaced along the direction from the clamping end 7 to the connecting end 8. When the cold-pressed terminal 3 and the vertical copper busbar 2 are connected, the two connecting holes 13 correspond to the two mounting holes 6 one by one. By setting two mounting holes 6 and two connecting holes 13, the connection stability between the cold-pressed terminal 3 and the vertical copper busbar 2 is improved, and the cold-pressed terminal 3 is effectively prevented from rotating around the bolt 16 as the rotation axis due to loosening due to external force or long-term use, thereby contacting with other cold-pressed terminals 3 and causing safety accidents.

[0045] When there are two mounting holes 6 and two connecting holes 13 , two fastening devices are also required for each cold-pressed terminal 3 .

[0046] Preferably, one of the mounting holes 6 is configured as a long hole structure. The configuration of the long hole structure facilitates adjustment of the mounting position of the cold-pressed terminal 3 on the vertical copper bus 2 during the installation process, thereby indirectly improving the applicability of the connection.

[0047] In summary, the utility model provides a transformer low-voltage outlet connection structure, which leads out a low-voltage outlet on the coils at the head end of the low-voltage burning group and located in the same column, and connects N low-voltage outlets arranged along the axial direction of the iron core in parallel to the same cold-pressed terminal. This operation can greatly reduce the number of cold-pressed terminals required when the low-voltage burning group on the transformer is connected to the vertical copper busbar, and solves the problem that the low-voltage outlet needs to be connected to the vertical copper busbar through a 1:1 number of cold-pressed terminals in the prior art, which leads to difficulties in installation, procurement and management of the cold-pressed terminals, and the need to connect multiple cold-pressed terminals leads to many fixing bolts, high labor intensity and low efficiency. problem; at the same time, through the coordinated use of the clamping structure and the threading hole, the low-voltage outlet can be stably installed on the cold-pressed terminal, thereby improving the connection stability between the low-voltage outlet and the cold-pressed terminal; through the coordinated connection of the mounting hole and the connecting hole, the connection stability between the cold-pressed terminal and the vertical copper busbar is improved, and the cold-pressed terminal is effectively prevented from rotating around the bolt as the rotation axis due to loosening due to external force or long-term use, thereby contacting other cold-pressed terminals and causing safety accidents; by setting one of the mounting holes to a long hole structure, the vertical copper busbar can adapt to the connection of cold-pressed terminals with different connection hole spacings, thereby indirectly improving the practicability of the connection structure.

[0048] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A transformer low voltage outlet connection structure, characterized in that: include: A vertical copper busbar (2) is provided with a plurality of mounting holes (6) at equal intervals in the length direction; A double-cake low-pressure sintering group (1) comprises a plurality of coils (4) and an iron core, wherein the plurality of coils (4) are wound on the iron core and arranged in an axial direction of the iron core, and a low-pressure outlet (5) is led out from the coils (4) at the head end and located in the same row; N low-voltage outlets (5) arranged continuously along the axial direction of the iron core are connected together by a cold-pressed terminal (3), wherein N is not less than two; The cold-pressed terminal (3) is mounted on the mounting hole (6) via a fastening device.

2. A transformer low voltage outlet connection structure according to claim 1, characterized in that: The cold-pressed terminal (3) comprises a pressing end (7) and a connecting end (8), wherein the pressing end (7) and the connecting end (8) are an integrated structure; The clamping end (7) comprises a main body (9), a first clamping structure (10) and a second clamping structure (11), wherein the first clamping structure (10) and the second clamping structure (11) are mounted on the main body (9), and a threading hole (12) is provided on the other end of the main body (9); The connecting end (8) is provided with a connecting hole (13).

3. A transformer low voltage outlet connection structure according to claim 2, characterized in that: The first pressing structure (10) comprises two overlapping first pressing bent plates (14), and anti-slip grooves are provided on the inner side surfaces of the first pressing bent plates (14).

4. A transformer low voltage outlet connection structure according to claim 2, characterized in that: The second pressing structure (11) comprises two overlapping second pressing bent plates (15), and the inner side surfaces of the second pressing bent plates (15) are provided with anti-slip grooves.

5. A transformer low voltage outlet connection structure according to claim 2, characterized in that: A plurality of threading holes (12) are arranged at equal intervals along the width direction of the main body (9), and each threading hole (12) is used for one of the low-voltage outlet heads (5) to pass through for connection.

6. A transformer low voltage outlet connection structure according to claim 2, characterized in that: The mounting hole (6) and the connecting hole (13) are used in conjunction with each other; The plurality of mounting holes (6) are distributed at equal intervals along the width direction of the vertical copper busbar (2); A plurality of the connection holes (13) are distributed at equal intervals along the direction from the clamping end (7) to the connection end (8); when the cold-pressed terminal (3) and the vertical copper busbar (2) are connected, the connection holes (13) correspond to the mounting holes (6).

7. A transformer low voltage outlet connection structure according to claim 6, characterized in that: One of the mounting holes (6) is configured as a long hole structure; When the cold-pressed terminal (3) and the vertical copper busbar (2) are connected, the mounting hole (6) of the long hole structure corresponds to the connection hole (13) far away from the clamping end (7).

8. A transformer low voltage outlet connection structure according to claim 2, characterized in that: The fastening device comprises a bolt (16) and a nut (17), the screw rod of the bolt (16) passes through the mounting hole (6) and the connecting hole (13) in sequence, the nut (17) is threadedly connected to the bolt (16), and the heads of the nut (17) and the bolt (16) are respectively located on both sides of the vertical copper busbar (2).

9. A transformer low voltage outlet connection structure according to claim 1, characterized in that: The cold-pressed terminal (3) and the low-voltage outlet (5) are both made of metallic copper.

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