Current transformer

Abstract

The utility model relates to a current transformer, which comprises a shell with a cylindrical structure; the first supporting part is arranged at the end part in the shell; the coil supporting barrel is provided with a top part and a root part, the coil supporting barrel is arranged in the shell, and the root part of the coil supporting barrel is supported by the first supporting part; the coil is arranged on the coil supporting cylinder in a sleeving manner; one part of the second supporting part is connected with the coil supporting cylinder, and the other part of the second supporting part is connected with the shell, so that the second supporting part is supported at the axial middle area of the coil supporting cylinder. According to the current transformer, the additional support is arranged in the middle of the coil supporting cylinder, and two-point supporting is achieved together with the support at the root of the current transformer, so that the stress at the root of the coil supporting cylinder is reduced, the bearable weight of the coil is increased, and the supporting strength and the shock resistance of the transformer are improved.

Description

Technical Field

[0001] The utility model relates to a current transformer. Background Art

[0002] In the field of electrical control, current transformers are often used. Figure 1 In the prior art of the current transformer shown, the mounting plate 3 is fixed to one end of the housing 2 , and the coil support cylinder 6 is fixed to the mounting plate 3 , so that the coil support cylinder 6 is supported by the mounting plate 3 , and the coil 7 surrounds the coil support cylinder 6 .

[0003] The above support method is achieved by fixing the coil support tube 6 to the mounting plate 3 at a single point. However, the current transformer usually has a large number of coils and a large weight. This single-point support method will cause problems such as insufficient support strength, small load-bearing capacity, and poor seismic resistance. Utility Model Content

[0004] In view of this, the utility model proposes a current transformer, in which an additional support is arranged in the middle position of the coil support tube of the current transformer, and two-point support is realized with the root of the current transformer, so as to reduce the stress at the root of the support tube, overcome the defect of insufficient support strength in the prior art, increase the load-bearing weight of the coil and the seismic resistance of the transformer.

[0005] The current transformer according to the present application includes: a shell having a cylindrical structure; a first support portion arranged at the end inside the shell; a coil support cylinder having a top and a root, arranged inside the shell, and the root of the coil support cylinder is supported by the first support portion; a coil, sleeved on the coil support cylinder; and a second support portion, a part of the second support portion is connected to the coil support cylinder, and another part of the second support portion is connected to the shell, so that the second support portion is supported at the middle area of ​​the coil support cylinder along the axial direction.

[0006] The current transformer is provided with an additional support in the middle of the coil support tube, namely the second support part, which realizes two-point support together with the support at the root of the current transformer, thereby reducing the stress at the root of the coil support tube, increasing the load-bearing weight of the coil, and improving the support strength and the seismic resistance of the transformer.

[0007] Furthermore, the current transformer includes a plurality of coil support tubes and a plurality of coils which are correspondingly mounted on the plurality of coil support tubes; the first support portion includes a mounting plate which is fixedly mounted in the outer shell; the second support portion includes a support plate and a plurality of connectors, the support plate includes a plurality of receiving holes, the plurality of coil support tubes are respectively inserted into corresponding ones of the receiving holes so that the support plate can support each coil support tube, and the plurality of connectors are distributed along the periphery of the support plate and connect the support plate to the outer shell.

[0008] A plurality of connecting members are connected to the support plate and the shell to stably fix the plurality of coil support cylinders in the shell.

[0009] Furthermore, the second support portion further comprises a plurality of screw rods, and the support plate is respectively connected to each connecting member through each screw rod, so that the relative position between the support plate and the connecting member can be adjusted by screwing the screw rods.

[0010] By rotating the screw rod, the distance between the connecting piece and the supporting plate can be flexibly adjusted.

[0011] Further, the connecting piece is fixed to the housing by bolts. This connection mode is detachable and convenient for installation and disassembly.

[0012] Furthermore, the connecting member has an inner connecting end connected to the support plate and an outer connecting end connected to the shell, and the inner connecting end is staggered relative to the outer connecting end in the axial direction along the cylindrical structure of the shell in the assembled state.

[0013] The connecting piece adopts a staggered arrangement design to avoid interference between the connecting piece and the support plate.

[0014] Furthermore, the outer connecting end is configured as a first flat plate portion, the inner connecting end is configured as a second flat plate portion, the first flat plate portion and the second flat plate portion are connected via an intermediate inclined portion, and a plane where the first flat plate portion is located is parallel to a plane where the second flat plate portion is located.

[0015] This shape of the connecting piece has a simple structure, is easy to manufacture, and avoids interference between the connecting piece and the supporting plate.

[0016] Furthermore, the first flat plate portion is fixed to the housing by bolts, and the second flat plate portion is connected to the support plate by screws. The bolt connection is easy to disassemble, and the screw connection can flexibly adjust the distance between the connecting member and the support plate.

[0017] Furthermore, the first flat plate portion is fixed to the housing by two bolts, and the second flat plate portion is connected to the support plate by two screw rods, and the two bolts and the two screw rods are arranged in a rectangular shape in the assembled state. This arrangement can make the connection between the housing and the connection and the support plate more firmly fixed.

[0018] Furthermore, each of the plurality of connecting members is arranged between two adjacent coil support cylinders. This arrangement can more stably fix the coil support cylinders and improve the support strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1It is a cross-sectional view of a current transformer in the prior art.

[0021] Figure 2 This is a three-dimensional diagram of the current transformer of the present application.

[0022] Figure 3 This is a cross-sectional view of the current transformer of the present application.

[0023] Figure 4 for Figure 2 Magnified view of area W in FIG.

[0024] Figure 5 for Figure 4 The support plate moves to the left and interferes with the connecting parts.

[0025] Figure 6 For the general Figure 5 The connector is flipped over and no longer interferes with the support plate.

[0026] Figure 7 Shows the connector and Figure 4 The connecting parts in the figure have the same installation direction.

[0027] The reference numerals are as follows:

[0028] 1. Current transformer

[0029] 2. Shell

[0030] 3. Mounting plate

[0031] 4. Connectors

[0032] 41. First flat plate

[0033] 42. Second flat plate

[0034] 43. Middle inclined part

[0035] 5. Support plate

[0036] 6. Coil support tube

[0037] 7. Coil

[0038] 8. Screw

[0039] 9. Bolts DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with reference to the following embodiments.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art, and in the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0045] Figure 2 and Figure 3 A current transformer according to an embodiment of the present application is shown, and the current transformer 1 includes: a shell 2 having a cylindrical structure; a first support portion, arranged at the end inside the shell 2; a coil support tube 6 having a top and a root, arranged in the shell 2, and the root of the coil support tube 6 is supported by the first support portion; a coil 7, sleeved on the coil support tube 6; and a second support portion, a part of the second support portion is connected to the coil support tube 6, and the other part of the second support portion is connected to the shell 2, so that the second support portion is supported at the middle area of ​​the coil support tube 6 along the axial direction.

[0046] In this embodiment, the current transformer has a first support portion for fixing the first end of the coil support tube 6 and a second support portion for fixing the coil support tube 6 to the outer casing 2, thereby realizing two-point support of the coil support tube 6, reducing the stress at the root of the coil support tube, and improving the support strength.

[0047] like Figure 2 and Figure 3 As shown, the current transformer 1 includes a plurality of coil support cylinders 6 and a plurality of coils 7 which are sleeved on the plurality of coil support cylinders 6 in a one-to-one correspondence. The first support portion includes a mounting plate 3 which is fixedly mounted in the housing 2. Figure 2 As shown, the second support portion includes a support plate 5 and a plurality of connecting members 4, the support plate 5 includes a plurality of receiving holes, a plurality of coil supporting cylinders 6 are respectively inserted into corresponding ones of the receiving holes so that the support plate 5 can support each coil supporting cylinder 6, and the plurality of connecting members 4 are distributed along the periphery of the support plate 5 and connect the support plate 5 to the outer shell 2.

[0048] The second supporting portion further includes a plurality of screw rods 8 , and the supporting plate 5 is respectively connected to each connecting member 4 via each screw rod 8 , so that the relative position between the supporting plate 5 and the connecting member 4 can be adjusted by screwing the screw rod 8 .

[0049] The connecting member 4 is fixed to the housing 2 by means of bolts 9 .

[0050] The connecting member 4 has an inner connecting end connected to the support plate 5 and an outer connecting end connected to the housing 2. The inner connecting end is staggered relative to the outer connecting end in the axial direction of the cylindrical structure of the housing 2 in the assembled state. Figure 2 As shown, the side section of the connecting member 4 has a "Z"-like shape.

[0051] Specifically, the outer connecting end is configured as a first flat plate portion 41 , and the inner connecting end is configured as a second flat plate portion 42 . The first flat plate portion 41 and the second flat plate portion 42 are connected via an intermediate inclined portion 43 , and a plane where the first flat plate portion 41 is located is parallel to a plane where the second flat plate portion 42 is located.

[0052] Furthermore, the first flat plate portion 41 is fixed to the housing 2 by bolts, and the second flat plate portion 42 is connected to the support plate 5 by screws 8 .

[0053] The first flat plate portion 41 is fixed to the housing 2 by two bolts, and the second flat plate portion 42 is connected to the support plate 5 by two screw rods 8 , which are arranged in a rectangular shape in an assembled state.

[0054] Each of the plurality of connecting members 4 is arranged between two adjacent coil supporting cylinders 6 .

[0055] The following references Figure 4 , Figure 5 , Figure 6 and Figure 7 , describing in detail how the connecting member 4 can avoid interference with the supporting plate 5. Figures 4 to 7 yes Figure 3 Magnified view of area W.

[0056] Figure 4 The current transformer 1 in the first state is shown. In use, it is necessary to adjust the parameters of the current transformer 1, such as increasing or decreasing the coil 7, so the position of the support plate 5 needs to be adjusted. Figure 4 The support plate 5 is moved to the left side of the figure. If the position of the support plate 5 after adjustment is just aligned with the second flat plate portion 42 of the connecting member 4 (such as Figure 5 In the vertical direction, the second flat plate portion 42 of the connecting member 4 and the supporting plate 5 are in the same straight line direction), such as Figure 5 As shown, the support plate 5 will interfere with the connector 4, and the support plate 5 cannot be connected to the connector 4 by the screw 8. Therefore, the interference area can be defined as the interference area in which the second flat plate portion 42 of the connector 4 is aligned with the support plate 5, and in this area, the connector 4 cannot be connected to the support plate 5 by the screw 8.

[0057] The solution of the present application is to remove the connector 4 from the housing 2, and then turn the connector 4 over (such as Figure 5 In the process, the connecting member 4 is rotated 180 degrees around a vertical axis to reach Figure 6 The connector 4 is then mounted on the housing 2 after being turned over. Figure 5 The state of connector 4 in Figure 6 The state of the connecting member 4 in the figure is a mirror image relative to a plane that coincides with the first flat plate portion 41. In this way, due to the staggered shape of the first flat plate portion and the second flat plate portion of the connecting member 4, the second flat plate portion 42 of the flipped connecting member 4 will be spaced apart from the support plate 5 in the left-right direction in the figure, thereby avoiding interference between the second flat plate portion 42 and the support plate 5. Since the connecting member 4 is spaced apart from the support plate 5 in the left-right direction in the figure, the support plate 5 and the connecting member 4 can be connected by the screw 8.

[0058] When the support plate 5 continues to move to the left beyond Figure 5 When the interference area is installed, the connector 4 can still be Figure 4 Install in the installation direction, such as Figure 7 Therefore, the design structure of the connecting member 4 can realize the support plate 5 Figures 4 to 7 Can be installed in any position in the left or right direction.

[0059] The current transformer according to the present application adopts double-point support, that is, the coil support tube 6 is fixed to the bottom of the housing 2 through the mounting plate 3 at the root, and the coil support tube 6 is fixed to the side of the housing 2 through the support plate 5 and the connector 4 at the middle position, thereby improving the load-bearing and earthquake-resistant capabilities of the current transformer 1. In addition, the asymmetric design of the connector 4 solves the problem of interference between the support plate 5 and the connector 4 while achieving two-point support.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0062] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0063] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A current transformer, characterized in that: The current transformer (1) comprises: The housing (2) has a cylindrical structure; A first supporting portion, arranged at an end portion inside the housing (2); A coil support cylinder (6) having a top and a root, which is arranged in the housing (2), and the root of the coil support cylinder (6) is supported by the first support portion; A coil (7) is sleeved on the coil support tube (6); and A second support portion, a portion of which is connected to the coil support cylinder (6), and another portion of which is connected to the housing (2), so that the second support portion is supported at the middle area of ​​the coil support cylinder (6) along the axial direction.

2. The current transformer according to claim 1, characterized in that: The current transformer comprises a plurality of coil support cylinders (6) and a plurality of coils (7) sleeved on the plurality of coil support cylinders (6) in a one-to-one correspondence; The first supporting portion comprises a mounting plate (3), and the mounting plate (3) is fixedly mounted in the housing (2); The second supporting portion comprises a supporting plate (5) and a plurality of connecting members (4), wherein the supporting plate (5) comprises a plurality of receiving holes, wherein the plurality of coil supporting cylinders (6) are respectively inserted into corresponding ones of the receiving holes so that the supporting plate (5) can support each of the coil supporting cylinders (6), and the plurality of connecting members (4) are distributed along the periphery of the supporting plate (5) and connect the supporting plate (5) to the outer shell (2).

3. The current transformer according to claim 2, characterized in that: The second supporting portion further comprises a plurality of screw rods (8), and the supporting plate (5) is respectively connected to each of the connecting members (4) via each of the screw rods (8), so that the relative position between the supporting plate (5) and the connecting member (4) can be adjusted by screwing the screw rods (8).

4. The current transformer according to claim 3, characterized in that: The connecting member (4) is fixed to the housing (2) by means of bolts (9).

5. The current transformer according to claim 4, characterized in that: The connecting member (4) comprises an inner connecting end connected to the support plate (5) and an outer connecting end connected to the outer shell (2), wherein the inner connecting end is staggered relative to the outer connecting end in an axial direction along the cylindrical structure of the outer shell (2) in an assembled state.

6. The current transformer according to claim 5, characterized in that: The outer connecting end is configured as a first flat plate portion (41), and the inner connecting end is configured as a second flat plate portion (42); the first flat plate portion (41) and the second flat plate portion (42) are connected via an intermediate inclined portion (43), and a plane where the first flat plate portion (41) is located is parallel to a plane where the second flat plate portion (42) is located.

7. The current transformer according to claim 6, characterized in that: The first flat plate portion (41) is fixed to the housing (2) by means of bolts, and the second flat plate portion (42) is connected to the support plate (5) by means of the screw rod (8).

8. The current transformer according to claim 7, characterized in that: The first flat plate portion (41) is fixed to the housing (2) via two bolts, and the second flat plate portion (42) is connected to the support plate (5) via two screw rods (8), wherein the two bolts and the two screw rods are arranged in a rectangular shape in an assembled state.

9. The current transformer according to claim 2, characterized in that: Each of the plurality of connecting members (4) is arranged between two adjacent coil supporting cylinders (6).

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