Cable termination arrangement for a transformer

Abstract

The utility model relates to a cable terminal connecting device for transformer, and the secondary output side of transformer has bushing, and the cable terminal connecting device is used for connecting cable terminal to bushing, and the cable terminal connecting device includes first component and second component, wherein, first component includes: first connecting structure is connected with bushing, second connecting structure and deformation structure are arranged between first connecting structure and second connecting structure, wherein the distance between first connecting structure and second connecting structure can be adjusted according to the shape change of deformation structure, second component has rotation axis and the installation part connected with cable terminal, and second component is configured to be able to rotate around rotation axis relative to second connecting structure to make installation part have different installation angle. The cable terminal connecting device of the utility model is simple in structure, is convenient for manufacturing standard structure, is convenient for processing, is suitable for various installation hole positions and installation distance.

Description

Technical Field

[0001] This utility model relates to a cable termination connection device for transformers. Background Technology

[0002] On the secondary side of a transformer, cables are often used for lead-out. However, due to the differences in the models of cable plugs, the components connecting the plugs inside the transformer are complex and varied. Furthermore, once the installation angle of the cable plug changes, the connection device cannot be matched, requiring the redesign and production of such a connection device. This redesigned and produced connection device then needs to be sent to the site for installation, which inevitably leads to a waste of time and cost. Utility Model Content

[0003] In view of this, the present invention proposes a novel cable terminal connection device for transformers. This connection device has a simple structure, is easy to make into a standard structure, and is easy to process. Moreover, this connection device is selectable, realizes stepless adjustable installation angle, adapts to various installation hole positions, and has the characteristic of being telescopic and adjustable, thus adapting to various installation distances of different lengths.

[0004] According to a preferred embodiment of the present invention, a cable termination connection device for a transformer is provided. The transformer has a bushing on its secondary output side. The cable termination connection device is used to connect a cable termination to the bushing. The cable termination connection device includes a first component and a second component. The first component includes: a first connecting structure connected to the bushing; a second connecting structure; and a deformable structure disposed between the first and second connecting structures. The distance between the first and second connecting structures can be adjusted according to the shape change of the deformable structure. The second component has a rotation axis and a mounting portion connected to the cable termination. The second component is configured to rotate relative to the second connecting structure about the rotation axis, so that the mounting portion has different mounting angles. The provided cable termination connection device can achieve stepless mounting angle and telescopic adjustment capability, and can be adapted to different mounting hole positions and mounting distances.

[0005] According to an exemplary embodiment of the present invention, the deformable structure includes: a first copper plate, with a first end of a first connecting structure connected to the first copper plate; a second copper plate, with a first end of a second connecting structure connected to the second copper plate; and a first flexible connecting piece and a second flexible connecting piece, wherein the first end of the first flexible connecting piece is fixed to the first copper plate by bolts, the second end of the first flexible connecting piece is fixed to the second copper plate by bolts, and the first end of the second flexible connecting piece is fixed to the first copper plate by bolts, and the second end of the second flexible connecting piece is fixed to the second copper plate by bolts. The deformable structure achieves distance adjustment between the first connecting structure and the second connecting structure through plastic deformation of the first and second flexible connecting pieces. This thereby achieves the telescopic adjustment capability of the connecting device with a simple and low-cost structural design.

[0006] According to an exemplary embodiment of the present invention, both the first flexible connecting piece and the second flexible connecting piece are thin sheets made of copper, wherein the thickness of the sheets is in the range of 0.1 to 0.3 mm. This particularly realizes the plastic deformation capability of the deformable structure, which can change the degree of bending of the sheets according to installation requirements, thereby changing the length of the connecting device to adapt to specific installation needs.

[0007] According to an exemplary embodiment of the present invention, the second component includes a connecting flange, wherein the connecting flange is fixedly connected to the cable terminal by bolts. The connecting device is mounted and fixed to the cable terminal by means of the connecting flange, thereby electrically and mechanically connecting the sleeve to the cable terminal.

[0008] According to an exemplary embodiment of the present invention, the second component further includes: a pressure equalizing ball connecting plate, wherein the pressure equalizing ball connecting plate is bolted to the connecting flange and welded to the inner wall of the pressure equalizing ball. This allows for the pressure equalizing ball to be fixed to the connecting device according to the present invention in a low-cost manner.

[0009] According to an exemplary embodiment of the present invention, the first connection structure includes a copper rod, wherein a first end of the copper rod is electrically connected to a sleeve, and a second end of the copper rod is welded to a first copper plate. This provides a simple and easily standardized connection method for electrically and mechanically connecting the sleeve and the cable terminal.

[0010] According to an exemplary embodiment of the present invention, the first connection structure further includes a connecting copper plate, wherein a first end of the connecting copper plate is connected to the sleeve by bolts, and a second end of the connecting copper plate is welded to the copper rod. The connecting copper plate provides sufficient current-carrying area while providing the transfer capability to connect the copper rod to the sleeve.

[0011] According to an exemplary embodiment of the present invention, the second connecting structure includes: a connecting rod, coaxially arranged with the copper rod, wherein a first end of the connecting rod is welded to a second copper plate, and a second end of the connecting rod is inserted into the connecting flange of the second component; and a copper sleeve, disposed within the second component and fixedly connected to the second end of the connecting rod. This achieves a simple connection relationship between the first connecting structure and the second connecting structure in the connecting device via a deformable structure, reducing production difficulty and facilitating the provision of a steplessly adjustable installation angle for the connecting device.

[0012] According to an exemplary embodiment of the present invention, the connecting flange of the second component includes a stepped groove, the large-diameter end of which is away from the first component, and the copper sleeve has a stepped outer surface to mate with the stepped groove. Thus, a simple and compact structural design enables rotatable connection between multiple components within the connecting device and steplessly adjustable installation angles of the connecting device.

[0013] According to an exemplary embodiment of the present invention, the cable termination connection device further includes an insulating support assembly, wherein the insulating support assembly includes: a support member extending in a direction perpendicular to the copper rod, including a groove in the middle of the support member that matches the shape of the copper rod; a clamping member fixed to the support member by insulating bolts, which, together with the support member, clamps the copper rod in the groove; and a first L-shaped connector and a second L-shaped connector, wherein the first L-shaped connector is fixed to a first end of the support member by insulating bolts, and the second L-shaped connector is fixed to a second end of the support member by insulating bolts, and the first L-shaped connector and the second L-shaped connector abut against the inner wall of the cable box for accommodating the cable termination connection device. The cable termination connection device not only has the ability to electrically connect the transformer bushing to the cable terminal, but also has sufficient insulation capacity to prevent accidental short circuits.

[0014] According to an exemplary embodiment of the present invention, the insulating support assembly is made of insulating paper, and the insulating bolts are all made of laminated wood. Suitable insulation performance of the cable termination connection device is achieved by means of low-cost materials. Attached Figure Description

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the above and other features and advantages of the present invention, in which:

[0016] Figure 1 A schematic diagram of a cable termination connection device according to an embodiment of the present invention is shown.

[0017] Figure 2 A schematic diagram of a cable box containing a cable termination connection device according to an embodiment of the present invention is shown.

[0018] Figure 3 A schematic diagram of a cable termination connection device with an insulating support assembly according to an embodiment of the present invention is shown.

[0019] Figure 4 A schematic diagram of a cable termination connection device with an insulating support assembly connected to an equalizing ball, according to an embodiment of the present invention, is shown. Detailed Implementation

[0020] To enable those skilled in the art to better understand the solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other solutions obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0021] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a product or device that comprises a series of units is not necessarily limited to those units that are explicitly listed, but may include other units that are not listed or that are inherent to such products or devices.

[0022] Figure 1 A schematic diagram of a cable termination connection device 100 according to an embodiment of the present invention is shown. In this embodiment, the cable termination connection device 100 is used to connect a cable termination to a bushing on the secondary output side of a transformer. The bushing is then electrically and mechanically connected to the cable termination via the cable termination connection device 100. A cable plug-in connector, with a male-female plug-in configuration, is also connected to the portion of the cable termination exposed from the cable box. Figure 1In one embodiment, the cable termination connection device 100 includes a first component 1 and a second component 2. The first component 1 includes a first connecting structure 11, a second connecting structure 12, and a deformable structure 13. In this embodiment, the first connecting structure 11 is connected to a sleeve, and the deformable structure 13 is disposed between the first connecting structure 11 and the second connecting structure 12, such that the distance between the first connecting structure 11 and the second connecting structure 12 can be adjusted according to the shape change of the deformable structure 13. The second component 2 has a rotation axis and a mounting portion connected to the cable termination, and the second component 2 is configured to rotate relative to the second connecting structure 12 about the rotation axis, so that the mounting portion has different mounting angles. The second component 2 includes a connecting flange 21 as the mounting portion, wherein the connecting flange 21 is bolted to the cable termination. Furthermore, the second component 2 also includes an equalizing ball connecting plate 22, wherein the equalizing ball connecting plate 22 is bolted to the connecting flange 21 and welded to the inner wall of the equalizing ball.

[0023] exist Figure 1 In the illustrated embodiment, the deformable structure 13 includes a first copper plate 131, a second copper plate 132, a first flexible connecting piece 133, and a second flexible connecting piece 134. The first end of the first connecting structure 11 is connected to the first copper plate 131, and the first end of the second connecting structure 12 is connected to the second copper plate 132. The first end of the first flexible connecting piece 133 is bolted to the first copper plate 131, and the second end of the first flexible connecting piece 133 is bolted to the second copper plate 132. Similarly, the first end of the second flexible connecting piece 134 is bolted to the first copper plate 131, and the second end of the second flexible connecting piece 134 is bolted to the second copper plate 132. The deformable structure 13 achieves distance adjustment between the first connecting structure 11 and the second connecting structure 12 through the plastic deformation of the first flexible connecting piece 133 and the second flexible connecting piece 134. In a preferred embodiment, both the first flexible connecting piece 133 and the second flexible connecting piece 134 are thin sheets made of copper, wherein the thickness of the sheets is in the range of 0.1 to 0.3 mm. In an embodiment not shown, the deformable structure 13 includes not only the first flexible connecting piece 133 and the second flexible connecting piece 134, but also a third flexible connecting piece or more flexible connecting pieces. In one embodiment, the other flexible connecting pieces besides the first flexible connecting piece 133 and the second flexible connecting piece 134 are arranged at equal intervals around the rotation axis and are connected to the first copper plate 131 and the second copper plate 132, respectively.

[0024] In addition, according to Figure 1In one embodiment, the first connecting structure 11 includes a copper rod 111, the first end of which is electrically connected to a sleeve, and the second end of which is welded to a first copper plate 131. In this embodiment, the copper rod 111 is designed to have a circular cross-section. In another embodiment (not shown), the copper rod 111 is designed to have a square or elliptical cross-section. The first connecting structure 11 also includes a connecting copper plate 112, the first end of which is bolted to the sleeve, and the second end of which is welded to the copper rod 111. The second connecting structure 12 includes a connecting rod 121 and a copper sleeve 122. The connecting rod 121 is coaxially arranged with the copper rod 111, wherein the first end of the connecting rod 121 is welded to the second copper plate 132, and the second end of the connecting rod 121 is inserted into the connecting flange 21 of the second assembly 2. The copper sleeve 122 is disposed within the second assembly 2 and is fixedly connected to the second end of the connecting rod 121. Before the cable termination connector 100 is installed, the copper sleeve 122 and the welded connecting rod 121 can rotate freely within the second component 2 or the connecting flange 21 of the second component 2 and can move to protrude from below the connecting flange 21. The connecting flange 21 of the second component 2 includes a stepped groove, the large-diameter end of which is away from the first component 1, and the copper sleeve 122 has a stepped outer surface to mate with the stepped groove. In this embodiment, all bolts and washers used to fasten the various components of the cable termination connector 100 are made of iron, while the remaining components of the cable termination connector 100 are made of copper.

[0025] Figure 2 A schematic diagram of the structure of a cable box 7 housing a cable termination connection device 100 according to an embodiment of the present invention is shown. Figure 2 As shown, the cable termination connection device 100 is housed within the cable box 7. One end of the device is electrically and mechanically connected to the tail of the sleeve 4, and the other end is electrically and mechanically connected to the cable terminal 3. An equalizing ball 5 is also provided within the cable box 7. The cable termination connection device 100 is welded to the equalizing ball 5, such that at least a portion of the cable termination connection device 100 is surrounded by the equalizing ball 5.

[0026] Figure 3 A schematic diagram of a cable termination connection device 100 with an insulating support assembly 6 according to an embodiment of the present invention is shown. Figure 3In one embodiment, the cable termination connection device 100 further includes an insulating support assembly 6. In this embodiment, the insulating support assembly 6 includes a support member 61, a clamping member 62, and a first L-shaped connector 63 and a second L-shaped connector 64. The support member 61 extends in a direction perpendicular to the copper rod 111 and includes a groove in the middle of the support member 61 that matches the shape of the copper rod 111. The clamping member 62 is fixed to the support member 61 by insulating bolts, clamping the copper rod 111 within the groove together with the support member 61. The first L-shaped connector 63 is fixed to a first end of the support member 61 by insulating bolts, and the second L-shaped connector 64 is fixed to a second end of the support member 61 by insulating bolts. The first L-shaped connector 63 and the second L-shaped connector 64 abut against the inner wall of the cable box for accommodating the cable termination connection device 100 and can be fixed to the inner wall of the cable box by bolt connection. In one embodiment, multiple insulating support assemblies 6 are provided on the copper rod 111 according to its length. In one embodiment, the insulating support assembly 6 is made of insulating paper, and the insulating bolts are all made of laminated wood. Figure 3 It is also shown that the insulating support assembly 6 is arranged between the sleeve 4 on the copper rod 111 and the deformed structure 13, and a connecting flange 21 and an equalizing ball connecting plate 22 arranged on the connecting flange 21 are provided below the deformed structure 13. The equalizing ball connecting plate 22 is fixed to the connecting flange 21 by bolts. Furthermore, in this embodiment, as... Figure 3 As shown, the connecting copper plate 112 is designed to have a T-shape, wherein the end with a smaller current-carrying area is welded to the copper rod 111, and the end with a larger current-carrying area is fixedly connected to the tail connection structure of the sleeve 4 by bolts.

[0027] Figure 4 A schematic diagram of a cable termination connection device 100 connected to an equalizing ball 5 and having an insulating support assembly 6 according to an embodiment of the present invention is shown. In this embodiment, the equalizing ball 5 is fixed to the cable termination connection device 100 and arranged below the insulating support assembly 6, such that the insulating support assembly 6 is located between the sleeve 4 and the equalizing ball 5. Moreover, the equalizing ball 5 completely surrounds a portion of the cable termination connection device 100, so that even if the length of the cable termination connection device 100 changes, the surrounded component will not be exposed from the equalizing ball 5. For example, even if the deformable structure of the cable termination connection device 100 changes shape, neither the first copper plate and the second copper plate of the deformable structure nor the first flexible connecting piece and the second flexible connecting piece will be exposed from the equalizing ball 5.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cable termination connection device (100) for a transformer, wherein the secondary output side of the transformer has a bushing, the cable termination connection device (100) being used to connect a cable termination (3) to the bushing, characterized in that, The cable termination connection device (100) includes a first component (1) and a second component (2), wherein, The first component (1) includes: The first connecting structure (11) is connected to the sleeve (4); The second connection structure (12); and A deformable structure (13) is disposed between the first connecting structure (11) and the second connecting structure (12), wherein the distance between the first connecting structure (11) and the second connecting structure (12) can be adjusted according to the shape change of the deformable structure (13); The second component (2) has a rotation axis and a mounting portion connected to the cable terminal (3). The second component (2) is configured to rotate about the rotation axis relative to the second connection structure (12) so that the mounting portion has different mounting angles.

2. The cable termination connection device (100) according to claim 1, characterized in that, The deformable structure (13) includes: The first copper plate (131) is connected to the first end of the first connecting structure (11). The second copper plate (132), the first end of the second connecting structure (12) is connected to the second copper plate (132); and A first flexible connecting piece (133) and a second flexible connecting piece (134), wherein the first end of the first flexible connecting piece (133) is fixed to the first copper plate (131) by bolts, the second end of the first flexible connecting piece (133) is fixed to the second copper plate (132) by bolts, and the first end of the second flexible connecting piece (134) is fixed to the first copper plate (131) by bolts, and the second end of the second flexible connecting piece (134) is fixed to the second copper plate (132) by bolts. The deformable structure (13) achieves the distance adjustment between the first connecting structure (11) and the second connecting structure (12) through the plastic deformation of the first soft connecting piece (133) and the second soft connecting piece (134).

3. The cable termination connection device (100) according to claim 2, characterized in that, Both the first flexible connector (133) and the second flexible connector (134) are thin sheets made of copper, wherein the thickness of the thin sheet is in the range of 0.1 to 0.3 mm.

4. The cable termination connection device (100) according to claim 2, characterized in that, The second component (2) includes: A connecting flange (21) is used as the mounting part and is fixedly connected to the cable terminal (3) by bolts.

5. The cable termination connection device (100) according to claim 4, characterized in that, The second component (2) also includes: The equalizing ball connecting plate (22) is fixed to the connecting flange (21) by bolts and welded to the inner wall of the equalizing ball (5).

6. The cable termination connection device (100) according to claim 4, characterized in that, The first connection structure (11) includes: A copper rod (111) is provided, the first end of which is electrically connected to the sleeve (4), and the second end of which is welded to the first copper plate (131).

7. The cable termination connection device (100) according to claim 6, characterized in that, The first connection structure (11) further includes: A connecting copper plate (112) is provided, wherein the first end of the connecting copper plate (112) is connected to the sleeve (4) by bolts, and the second end of the connecting copper plate (112) is welded to the copper rod (111).

8. The cable termination connection device (100) according to claim 6, characterized in that, The second connection structure (12) includes: A connecting rod (121) is arranged coaxially with the copper rod (111), wherein a first end of the connecting rod (121) is welded to the second copper plate (132), and a second end of the connecting rod (121) is inserted into the connecting flange (21) of the second assembly (2); and A copper sleeve (122) is disposed within the second component (2) and is fixedly connected to the second end of the connecting rod (121).

9. The cable termination connection device (100) according to claim 8, characterized in that, The connecting flange (21) of the second component (2) includes a stepped groove, the large-diameter end of which is away from the first component (1), and the copper sleeve (122) has a stepped outer surface to mate with the stepped groove.

10. The cable termination connection device (100) according to claim 6, characterized in that, The cable termination connection device (100) further includes an insulation support assembly (6), wherein the insulation support assembly (6) includes: The support member (61) extends in a direction perpendicular to the copper rod (111) and includes a groove in the middle of the support member (61) that matches the shape of the copper rod (111). The clamping member (62), fixed to the support member (61) by insulating bolts, together with the support member (61) clamps the copper rod (111) in the groove; and The first L-shaped connector (63) and the second L-shaped connector (64) are fixed to the first end of the support member (61) by insulating bolts, and the second L-shaped connector (64) is fixed to the second end of the support member (61) by insulating bolts. The first L-shaped connector (63) and the second L-shaped connector (64) abut against the inner wall of the cable box (7) for accommodating the cable terminal connection device (100).

11. The cable termination connection device (100) according to claim 10, characterized in that, The insulating support assembly (6) is made of insulating paper, and the insulating bolts are all made of laminated wood.

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