Protective cover and mutual inductor with same

Abstract

The utility model provides a protective cover and a mutual inductor with the same. The protective cover is used for covering a primary wiring board of a mutual inductor body, and comprises a protective cover body, which is provided with a mounting opening and a containing cavity which are communicated with each other, so that the primary wiring board is mounted in the containing cavity through the mounting opening; the end, away from the installation opening, of the protection cover body is a cover top, and the outer diameter of at least part of the protection cover body is gradually reduced in the direction from the installation opening to the cover top. The combined mutual inductor effectively solves the problem that in the prior art, a primary wiring part of a combined mutual inductor is prone to corrosion and poor contact occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, and in particular to a protective cover and a mutual inductor having the same. Background Art

[0002] At present, with the rapid development of economy and the improvement of living standards, people's demand for electricity is increasing. The use of high-voltage combined transformers in power systems is a simple and convenient metering method. Among them, high-voltage combined transformers usually have the following metering methods: (1) The primary high-voltage ends of two cast-type single-phase voltage transformers and two single-phase current transformers are combined on the mounting bracket according to VV wiring; (2) The primary high-voltage ends of three cast-type single-phase voltage transformers and three single-phase current transformers are combined on the mounting bracket according to YY wiring; (3) The cast-type single-phase current and voltage transformers are installed in a metal shell and connected into VV and YY as an integrated type. The cast-type transformer is installed in a metal shell and uses a porcelain sleeve for external insulation.

[0003] However, for the above three metering methods, due to the leakage of the connecting busbar, multiple connection points and no primary protection device, in the three highs and three strong environments (high temperature, high humidity, high salt fog, strong typhoons, heavy rains and strong thunderstorms), the connection parts are prone to corrosion, resulting in poor contact, heat discharge and other adverse phenomena, and the secondary part cannot monitor the correctness of the wiring. Utility Model Content

[0004] The main purpose of the utility model is to provide a protective cover and a mutual inductor having the same, so as to solve the problem that the primary wiring part of the combined mutual inductor in the prior art is easy to corrode and cause poor contact.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a protective cover is provided, which is used to cover the primary terminal board of the transformer body, and the protective cover comprises: a protective cover body, having an installation opening and an accommodating cavity that are interconnected, so that the primary terminal board can be loaded into the accommodating cavity through the installation opening; an end of the protective cover body away from the installation opening is a cover top, and along the direction from the installation opening to the cover top, the outer diameter of at least part of the protective cover body gradually decreases.

[0006] Furthermore, the cover top has a wire hole communicating with the accommodating cavity, and the wire hole passes through the cover top.

[0007] Furthermore, the protective cover also includes: a first connecting portion, which is arranged at the installation opening of the protective cover body to cooperate with a second connecting portion arranged on the transformer body; wherein, one of the first connecting portion and the second connecting portion is a convex portion, and the other of the first connecting portion and the second connecting portion is a concave portion, and the convex portion extends into the concave portion and cooperates with the concave portion to connect the protective cover and the transformer body.

[0008] Furthermore, the protection cover body also has a drainage hole communicated with the accommodating cavity, and the drainage hole is located on the lower surface of the protection cover body.

[0009] Furthermore, the drainage hole is located between the first connecting portion and the cover top.

[0010] Furthermore, the protective cover body includes: a cylindrical structure, the first end of the cylindrical structure has a mounting opening; a top plate, which is arranged on the second end of the cylindrical structure to form a cover top; and an arc plate, the second end of the cylindrical structure is connected to the top plate through the arc plate.

[0011] Furthermore, the protective cover is an integrally formed structure; and / or the protective cover is made of rubber or silicone.

[0012] According to another aspect of the utility model, a transformer is provided, comprising a transformer body and a protective cover, wherein the protective cover is arranged on a primary terminal board of the transformer body; wherein the protective cover is the above-mentioned protective cover.

[0013] Furthermore, there are two protective covers, the wire passing hole of one protective cover is for the cable of the A-phase terminal to pass through, and the wire passing hole of the other protective cover is for the cable of the C-phase terminal to pass through.

[0014] Furthermore, the transformer body has a secondary wiring part, and the transformer also includes: a transparent cover plate, which is covered on the secondary wiring part.

[0015] By applying the technical solution of the utility model, the protective cover includes a protective cover body, and the protective cover body has an installation opening and a receiving cavity that are interconnected, so that the primary terminal block can be loaded into the receiving cavity through the installation opening. The end of the protective cover body away from the installation opening is the cover top. In this way, in the three-high and three-strong environment, by arranging the protective cover on the primary terminal block of the transformer body, the primary terminal block is protected, thereby avoiding corrosion of the primary wiring part and causing poor contact, solving the problem of easy corrosion and poor contact of the primary wiring part of the combined transformer in the prior art, and ensuring the normal operation of the transformer. At the same time, since the outer diameter of at least part of the protective cover body gradually decreases in the direction from the installation opening to the cover top, so that the protective cover body is conical, the water attached thereto is diverted to the cover top position, further preventing the water from entering the connection between the protective cover and the primary terminal block and causing corrosion to the primary terminal block, thereby improving the protective effect of the protective cover on the primary terminal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A front view of an embodiment of a mutual inductor according to the utility model is shown;

[0018] Figure 2 Shows Figure 1 A side view of the transformer in FIG.

[0019] Figure 3 Shows Figure 2 A magnified schematic diagram of the mutual inductor in FIG.

[0020] Figure 4 A cross-sectional view of an embodiment of a protective cover according to the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Transformer body; 11. Primary terminal block; 12. Second connection part;

[0023] 20. Protective cover body; 21. Mounting opening; 22. Accommodating cavity; 23. Wire hole; 24. Drain hole; 25. Cylindrical structure; 26. Top plate; 27. Curved plate;

[0024] 30. a first connecting portion;

[0025] 40. Transparent cover;

[0026] 50. Rings;

[0027] 60. Nameplate;

[0028] 70. Phase B protective column head;

[0029] 80. Install the bracket. DETAILED DESCRIPTION

[0030] 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 utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0032] In the present invention, unless otherwise specified, directional words such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0033] In order to solve the problem in the prior art that the primary wiring part of the combined mutual inductor is easily corroded and causes poor contact, the present application provides a protective cover and a mutual inductor having the same.

[0034] like Figures 1 to 4 As shown, the protective cover is used to cover the primary wiring board 11 of the transformer body 10, and the protective cover includes a protective cover body 20. The protective cover body 20 has an installation opening 21 and an accommodating cavity 22 that are interconnected, so that the primary wiring board 11 can be installed in the accommodating cavity 22 through the installation opening 21. One end of the protective cover body 20 away from the installation opening 21 is the cover top, and the outer diameter of at least part of the protective cover body 20 gradually decreases in the direction from the installation opening 21 to the cover top.

[0035] By applying the technical solution of this embodiment, in a three-high and three-strong environment, the protective cover is set on the primary wiring board 11 of the transformer body 10 to protect the primary wiring board 11, thereby avoiding corrosion of the primary wiring part and causing poor contact, solving the problem of poor contact caused by corrosion of the primary wiring part of the combined transformer in the prior art, and ensuring the normal operation of the transformer. At the same time, since the outer diameter of at least part of the protective cover body 20 gradually decreases along the direction from the installation opening 21 to the cover top, so that the protective cover body 20 is tapered, so as to guide the water attached thereto to the cover top position, further preventing the water from entering the connection between the protective cover and the primary wiring board 11 and causing corrosion to the primary wiring board 11, thereby improving the protective effect of the protective cover on the primary wiring board 11.

[0036] like Figure 4 As shown, the cover top has a wire hole 23 connected to the accommodating cavity 22, and the wire hole 23 passes through the cover top. In this way, the above arrangement ensures that the cable of the terminal can be connected to the transformer body 10 through the wire hole 23, thereby improving the connection reliability between the transformer and the terminal.

[0037] like Figure 3 and Figure 4 As shown, the protective cover also includes a first connection portion 30, which is arranged at the installation opening 21 of the protective cover body 20, so as to cooperate with the second connection portion 12 arranged on the transformer body 10. Among them, one of the first connection portion 30 and the second connection portion 12 is a convex portion, and the other of the first connection portion 30 and the second connection portion 12 is a concave portion, and the convex portion extends into the concave portion and cooperates with the concave portion to connect the protective cover and the transformer body 10. In this way, the protective cover is connected to the transformer body 10 through the first connection portion 30 and the second connection portion 12, which makes it convenient for the staff to disassemble and assemble the protective cover and the transformer body 10, reducing the difficulty of operation for the staff. At the same time, the above-mentioned setting makes the structural selection of the first connection portion 30 and the second connection portion 12 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0038] In this embodiment, the first connection portion 30 is a recessed portion, and the second connection portion 12 is a convex portion. The convex portion extends into the recessed portion and cooperates with the recessed portion to connect the protective cover and the transformer body 10 .

[0039] It should be noted that the structure of the first connection part 30 and the second connection part 12 is not limited thereto and can be adjusted according to working conditions and usage requirements. In other embodiments not shown in the drawings, the first connection part is a convex part and the second connection part is a concave part, and the convex part extends into the concave part and cooperates with the concave part to connect the protective cover and the transformer body.

[0040] like Figure 4 As shown, the protective cover body 20 also has a drainage hole 24 connected to the accommodating cavity 22, and the drainage hole 24 is located on the lower surface of the protective cover body 20. In this way, even if water enters the protective cover body 20, it can be discharged to the outside of the protective cover through the drainage hole 24, so as to further prevent the water from corroding the primary wiring part, thereby improving the protective performance of the protective cover on the primary wiring board 11.

[0041] In this embodiment, the drain hole 24 is located between the first connecting portion 30 and the cover top. In this way, the above arrangement makes the arrangement position of the drain hole 24 more reasonable, so as to ensure that the water entering the protective cover can be fully discharged through the drain hole 24.

[0042] like Figure 4 As shown, the protective cover body 20 includes a cylindrical structure 25, a top plate 26 and an arc plate 27. The first end of the cylindrical structure 25 has a mounting opening 21, and the top plate 26 is arranged on the second end of the cylindrical structure 25 to form a cover top. The second end of the cylindrical structure 25 is connected to the top plate 26 through the arc plate 27. In this way, the above arrangement makes the structure of the protective cover body 20 simpler, easier to process and realize, and reduces the processing cost and difficulty of the protective cover; on the other hand, it avoids the generation of sharp edges on the protective cover body 20 to scratch or cut the staff, and also improves the appearance of the protective cover body 20.

[0043] Specifically, the arc plate 27 is annular, and the size of the arc plate 27 gradually decreases along the direction from the cylindrical structure 25 to the top plate 26. In particular, along the direction from the cylindrical structure 25 to the top plate 26, the outer diameter of the cylindrical structure 25 gradually decreases, so that the protective cover body 20 is conical, thereby ensuring that the water attached to the protective cover flows to the top position of the cover under its own weight, preventing corrosion from occurring at the primary wiring part.

[0044] Optionally, the protective cover is an integrally formed structure; and / or the protective cover is made of rubber or silicone. Thus, the above arrangement makes the structure of the protective cover simpler, easier to process and realize, and reduces the processing cost and difficulty of the protective cover. At the same time, the above arrangement makes the protective cover elastic and retractable, thereby covering and protecting primary wiring boards 11 of different sizes.

[0045] In this embodiment, the protective cover is an integrated structure and is made of silicone, so that the protective cover has the advantages of small size, light weight, safety and reliability, and is suitable for complex working conditions of outdoor overhead lines. At the same time, the above configuration ensures that the protective cover has insulation properties to prevent electric shock accidents.

[0046] like Figures 1 to 3 As shown, the present application also provides a transformer, including a transformer body 10 and a protective cover, wherein the protective cover is arranged on a primary wiring board 11 of the transformer body 10. The protective cover is the above-mentioned protective cover.

[0047] Specifically, the primary terminal block 11 is cast on the transformer body 10 . The transformer further includes a mounting bracket 80 , and the transformer body 10 is mounted on the mounting bracket 80 .

[0048] In this embodiment, there are two protective covers, one protective cover has a wire hole 23 for the cable of the A-phase terminal to pass through, and the other protective cover has a wire hole 23 for the cable of the C-phase terminal to pass through. In this way, one protective cover is a primary protective column head for the A-phase, and the other protective cover is a primary protective column head for the C-phase.

[0049] like Figure 1 As shown, the transformer body 10 has a secondary wiring part, and the transformer also includes a transparent cover plate 40. The transparent cover plate 40 is covered on the secondary wiring part. Specifically, the secondary wiring part adopts a clear phase sequence color to facilitate the distinction of the phase sequence during inspection and maintenance. The above-mentioned setting of the transparent cover plate 40 facilitates the observation of the secondary wiring, which greatly reduces the maintenance workload and other problems.

[0050] like Figure 1 As shown, the transformer further includes a lifting ring 50 , a nameplate plate 60 and a B-phase protective column head 70 . The lifting ring 50 is mounted on a mounting bracket 80 , the nameplate plate 60 is fixed on the transformer body 10 , and the B-phase protective column head 70 is mounted on the transformer body 10 .

[0051] Specifically, the B-phase protective column head 70 is a retractable silicone rubber adapted to the three-high and three-strong climates.

[0052] In this embodiment, the transformer is installed on a 10kV overhead line, and the wiring terminal of the overhead line is connected to the primary wiring board 11 of the transformer. After the connection, the A and C phases are respectively sealed through the A and C phase primary protection studs, and the B phase is sealed through the B phase protection stud 70 to seal the metal parts of the primary wiring part, so that the current winding of the transformer in the metering box is connected in series to the line and the voltage winding is connected in parallel to the line, and the current and voltage signals of the line can be collected from the secondary low-voltage part. At the same time, a transparent cover plate 40 is used to seal the secondary wiring part, and the secondary wiring can be observed and the phase sequence can be distinguished by the secondary marking color.

[0053] In this embodiment, the mutual inductor adopts a horizontal structure, thereby being able to effectively prevent the primary wiring from being damaged by the three high and three strong environments.

[0054] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0055] The protective cover includes a protective cover body, and the protective cover body has an installation opening and a receiving cavity that are interconnected, so that the primary terminal block can be installed in the receiving cavity through the installation opening. The end of the protective cover body away from the installation opening is the cover top. In this way, in the three-high and three-strong environment, by arranging the protective cover on the primary terminal block of the transformer body, the primary terminal block is protected, thereby avoiding corrosion of the primary wiring part and causing poor contact, solving the problem of easy corrosion and poor contact of the primary wiring part of the combined transformer in the prior art, and ensuring the normal operation of the transformer. At the same time, since the outer diameter of at least part of the protective cover body gradually decreases in the direction from the installation opening to the cover top, so that the protective cover body is conical, so as to guide the water attached thereto to the cover top position, further prevent the water from entering the connection between the protective cover and the primary terminal block and causing corrosion to the primary terminal block, thereby improving the protective effect of the protective cover on the primary terminal block.

[0056] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0057] 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.

[0058] 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 numbers used in this way can be interchanged 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.

[0059] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A protective cover, used for covering a primary terminal board (11) of a transformer body (10), characterized in that: The protective cover comprises: A protective cover body (20) having an installation opening (21) and a receiving cavity (22) which are communicated with each other, so that the primary wiring board (11) can be installed into the receiving cavity (22) through the installation opening (21); an end of the protective cover body (20) away from the installation opening (21) is a cover top, and along the direction from the installation opening (21) to the cover top, the outer diameter of at least a part of the protective cover body (20) gradually decreases; the cover top has a wire passing hole (23) which is communicated with the receiving cavity (22), and the wire passing hole (23) passes through the cover top; A first connection portion (30), the first connection portion (30) being arranged at a mounting opening (21) of the protective cover body (20) so as to cooperate with a second connection portion (12) arranged on the transformer body (10); The protective cover body (20) further comprises a drainage hole (24) communicating with the accommodating cavity (22), wherein the drainage hole (24) is located on the lower surface of the protective cover body (20); The protective cover body (20) comprises: A cylindrical structure (25), wherein a first end of the cylindrical structure (25) has the mounting opening (21); A top plate (26) arranged on the second end of the cylindrical structure (25) to form the cover top; An arc-shaped plate (27), wherein the second end of the cylindrical structure (25) is connected to the top plate (26) via the arc-shaped plate (27).

2. The protective cover according to claim 1, characterized in that: One of the first connection portion (30) and the second connection portion (12) is a convex portion, and the other of the first connection portion (30) and the second connection portion (12) is a concave portion, the convex portion extending into the concave portion and being limitedly engaged with the concave portion to connect the protective cover and the transformer body (10).

3. The protective cover according to claim 1, characterized in that: The drainage hole (24) is located between the first connecting portion (30) and the cover top.

4. The protective cover according to claim 1, characterized in that: The protective cover is an integrally formed structure; and / or the protective cover is made of rubber or silicone.

5. A mutual inductor, characterized in that: It comprises a transformer body (10) and a protective cover, wherein the protective cover is arranged on a primary wiring board (11) of the transformer body (10); wherein the protective cover is the protective cover according to any one of claims 1 to 4.

6. The mutual inductor according to claim 5, characterized in that: There are two protective covers, one of which has a wire hole (23) for allowing the cable of the A-phase wiring terminal to pass through, and the other of which has a wire hole (23) for allowing the cable of the C-phase wiring terminal to pass through.

7. The mutual inductor according to claim 5, characterized in that: The transformer body (10) has a secondary wiring portion, and the transformer further comprises: A transparent cover plate (40) is arranged to cover the secondary wiring location.

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