A plug-in sealed mutual inductor shielding shell and mutual inductor

Abstract

The utility model discloses a kind of shielding shell of plug-in airtight mutual inductor and a kind of mutual inductor, comprising: two half-ring grooves, two half-ring covers, locking assembly, wherein two half-ring grooves are spliced into complete ring groove by locking assembly, two half-ring covers are spliced into complete ring cover, ring groove and ring cover cooperate to form complete ring cavity for accommodating wire package, and provide magnetic shielding function to wire package, adopt split type shielding shell, its cost is lower, applicable to complex working condition environment and large-scale production. Mutual inductor is provided with elastic conductive filling material between shielding shell and wire package, effectively fills gap, further improves mutual inductor performance.

Description

Technical Field

[0001] This utility model relates to the field of instrument transformer manufacturing, specifically to a plug-in sealed instrument transformer shield and an instrument transformer. Background Technology

[0002] Existing split-type instrument transformer shields are prone to seams or gaps due to their structural characteristics, which can lead to electromagnetic leakage, especially affecting measurement accuracy in strong magnetic fields or high-precision measurement scenarios. Furthermore, ordinary opening and closing structures are prone to deformation or incomplete closure after frequent operation, resulting in a decrease in shielding performance. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art, the present invention provides a plug-in sealed current transformer shield and current transformer, which adopts a split structure, has high consistency in mold forming, and effectively solves the problems of magnetic leakage and incomplete closure.

[0004] This utility model provides a plug-in sealed current transformer shielding shell, including: annular groove, annular cover, and locking assembly;

[0005] The annular groove includes a first half-annular groove and a second half-annular groove. The splicing ends of the first half-annular groove are provided with an annular groove protrusion joint or an annular groove concave joint. The splicing ends of the second half-annular groove are provided with an annular groove concave joint or an annular groove protrusion joint. When the first half-annular groove and the second half-annular groove are spliced, the splicing ends are respectively fitted with an annular groove concave joint and an annular groove protrusion joint in a staggered insertion manner.

[0006] The locking component is disposed on the outer ring sidewall of the end of the first semi-annular groove and the second semi-annular groove to form a fixed connection between the first semi-annular groove and the second semi-annular groove.

[0007] The ring cover includes a first half ring cover and a second half ring cover. The splicing ends of the first half ring cover are provided with ring cover protrusion joints or ring cover concave joints. The splicing ends of the second half ring cover are provided with ring cover concave joints or ring cover protrusion joints. When the first half ring cover and the second half ring cover are spliced ​​together, the splicing ends are respectively fitted with ring cover concave joints and ring cover protrusion joints in a staggered overlapping manner.

[0008] The annular groove has an inner ring boss and an outer ring boss inside. When the annular cover is fitted with the annular groove, the inner edge of the annular cover abuts against the inner ring boss, the outer edge of the annular cover abuts against the outer ring boss, and the annular cover is fitted into the opening of the annular groove.

[0009] As an optional implementation, the locking assembly includes a first connecting ear, a second connecting ear, and a fastener. The first connecting ear is fixed to the outer side wall of the end of the first semi-annular groove, the second connecting ear is fixed to the outer side wall of the end of the second semi-annular groove, and the fastener secures the first connecting ear and the second connecting ear together.

[0010] As an optional implementation, one of the first connecting ear and the second connecting ear is provided with a positioning post, and the other of the first connecting ear and the second connecting ear is provided with a positioning hole. The positions of the positioning post and the positioning hole correspond one-to-one. When the first connecting ear and the second connecting ear are aligned, the positioning post is inserted into the positioning hole.

[0011] As an optional implementation, the first connecting ear and the second connecting ear are respectively provided with bolt holes corresponding to their positions, and the fastener is a bolt.

[0012] As an optional implementation, the annular groove, annular cover, and locking assembly are all made of a nickel-based alloy with high magnetic permeability.

[0013] Based on the same concept, this utility model also provides a current transformer, including the above-mentioned shielding shell, coil, and elastic filler material, wherein the gap between the coil and the shielding shell and the seams at various points of the shielding shell are filled with elastic conductive filler material.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The design employs a split structure, dividing the shielding shell into annular grooves and annular covers. The annular grooves are further divided into two semi-annular grooves, and the annular covers into two semi-annular covers. This ensures high consistency in mold forming and facilitates mass production of each component. The first and second semi-annular grooves, as well as the first and second semi-annular covers, utilize staggered insertion of concave and convex joints, secured with bolts. Furthermore, the annular grooves and annular covers are fitted together, structurally resolving the issue of magnetic leakage at the shielding shell seams. Compared to a one-piece shielding shell structure, this design offers comparable shielding performance at a lower cost, making it suitable for complex working environments and large-scale production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the shielding shell of a plug-in sealed current transformer.

[0018] Figure 2 This is an exploded view of the shielding shell of a plug-in sealed instrument transformer and an enlarged view of its partial connection.

[0019] Figure 3 for Figure 2 A magnified view of a portion of region A shown.

[0020] in:

[0021] 1. Annular groove; 11. First half-annular groove; 110. Annular groove protrusion; 12. Second half-annular groove; 120. Annular groove recess; 2. Annular cover; 21. First half-annular cover; 210. Annular cover protrusion; 22. Second half-annular cover; 220. Annular cover recess; 3. Locking assembly; 31. First connecting lug; 311. Positioning pin; 312. Positioning hole; 32. Second connecting lug; 41. Bolt hole; 51. Inner ring boss; 52. Outer ring boss. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0025] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0026] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0027] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0028] See Figures 1 to 3 This utility model discloses a plug-in sealed current transformer shielding shell, which adopts a split structure and includes: annular groove 1, annular cover 2, and locking component 3.

[0029] The annular groove 1 includes a first semi-annular groove 11 and a second semi-annular groove 12. Both ends of the first semi-annular groove 11 are provided with annular groove protrusion joints 110, and both ends of the second semi-annular groove 12 are provided with annular groove concave joints 120. When the first semi-annular groove 11 and the second semi-annular groove 12 are spliced, the splice joints are respectively fitted with the annular groove concave joints 120 and the annular groove protrusion joints 110 in a staggered insertion fit.

[0030] It is understandable that the placement of the annular groove protruding joint 110 and the annular groove concave joint 120 can be interchanged. For example, an annular groove protruding joint 110 can be placed at one end of the first half-annular groove 11, and an annular groove concave joint 120 can be placed at the other end of the first half-annular groove 11. Correspondingly, an annular groove protruding joint 110 and an annular groove concave joint 120 can be placed at the joints of both ends of the second half-annular groove 12. During splicing, the annular groove protruding joint 110 in the first half-annular groove 11 and the annular groove concave joint 120 in the second half-annular groove 12 are staggered and inserted into each other, while the annular groove concave joint 120 in the first half-annular groove 11 and the annular groove protruding joint 110 in the second half-annular groove 12 are staggered and inserted into each other. Alternatively, annular groove concave joints 120 can be placed at both ends of the first half-annular groove 11, and annular groove protruding joints 110 can be placed at both ends of the second half-annular groove 12. Both methods can achieve staggered sealing of the joint between the first half-annular groove 11 and the second half-annular groove 12.

[0031] The locking component 3 is disposed on the outer ring sidewall of the end of the first semi-annular groove 11 and the second semi-annular groove 12 to fix the first semi-annular groove 11 and the second semi-annular groove 12 together.

[0032] The ring cover 2 includes a first half ring cover 21 and a second half ring cover 22. Both ends of the first half ring cover 21 are provided with ring cover protrusion joints 210, and both ends of the second half ring cover 22 are provided with ring cover concave joints 220. When the first half ring cover 21 and the second half ring cover 22 are spliced, the splice joints are respectively staggered and overlapped by the ring cover concave joints 220 and the ring cover protrusion joints 210.

[0033] Similarly, regarding the specific fit between the two semi-annular grooves of annular groove 1, the placement of the annular cover convex joint 210 and the annular cover concave joint 220 in the annular cover 2 can also be interchanged. For example, an annular cover convex joint 210 can be placed at one end of the first semi-annular cover 21, and an annular cover concave joint 220 can be placed at the other end of the first semi-annular cover 21. Correspondingly, an annular cover convex joint 210 and an annular cover concave joint 220 can be placed at the joints of both ends of the second semi-annular cover 22. During splicing, the first semi-annular cover 21... The annular cover protrusion 210 and the annular cover concave joint 220 in the second half-annular cover 22 are staggered and overlapped, while the annular cover concave joint 220 in the first half-annular cover 21 and the annular cover protrusion 210 in the second half-annular cover 22 are staggered and overlapped; or, annular cover concave joints 220 are provided at both ends of the first half-annular cover 21, and annular cover protrusion joints 210 are provided at both ends of the second half-annular cover 22, both of which can achieve staggered sealing of the joint between the first half-annular cover 21 and the second half-annular cover 22.

[0034] The annular groove 1 has an inner annular boss 51 and an outer annular boss 52 inside. When the annular cover 2 is engaged with the annular groove 1, the inner edge of the annular cover 2 abuts against the inner annular boss 51, and the outer edge of the annular cover 2 abuts against the outer annular boss 52. That is, the inner annular boss 51 and the outer annular boss 52 cooperate to support the annular cover 2. At this time, the annular cover (2) and the opening of the annular groove (1) are fitted together. All the cooperation in this section contributes to the formation of an integrally closed annular cavity structure of the shielding shell. It can be understood that, based on the fact that the annular groove 1 includes a first half annular groove 11 and a second half annular groove 12, half of the inner annular boss 51 and half of the outer annular boss 52 are set in the first half annular groove 11, while the other half of the inner annular boss 51 and the other half of the outer annular boss 52 are set in the second half annular groove 12.

[0035] See Figure 2 and Figure 3 As a preferred embodiment of the locking component 3, it includes a first connecting ear 31, a second connecting ear 32, and a fastener 33. The first connecting ear 31 is fixed to the outer wall of the end of the first semi-annular groove 11, and the second connecting ear is fixed to the outer wall of the end of the second semi-annular groove 12. The first connecting ear 31 and the second connecting ear 32 are respectively provided with bolt holes 41 corresponding to their positions. Bolts can be selected as fasteners 33 to fix the first connecting ear 31 and the second connecting ear 32. Of course, the fastener 33 can also adopt other structures, such as rivets, to achieve the purpose of fixing the first connecting ear 31 and the second connecting ear 32.

[0036] Preferably, for easy alignment and positioning, one of the first connecting ear 31 and the second connecting ear 32 is provided with a positioning post 311, and the other of the first connecting ear 31 and the second connecting ear 32 is provided with a positioning hole 312. The positions of the positioning post 311 and the positioning hole 312 correspond one-to-one. When the first connecting ear and the second connecting ear are aligned, the positioning post 311 is inserted into the positioning hole 312. This limiting device can prevent the deformation of the annular groove 1 caused by the above-mentioned fixing process or other processes, thereby affecting the assembly accuracy and shielding performance of the shell.

[0037] In this embodiment, regarding the materials used for each component, it is preferable that the annular groove 1, the annular cover 2, and the locking assembly 3 are all made of nickel-based alloy with high magnetic permeability to improve shielding performance.

[0038] In addition, this utility model also discloses a current transformer, including the aforementioned shielding shell, coil, and elastic conductive filler material. The assembly process of the current transformer includes a step where, after the shielding ring groove is assembled, the coil is placed into the ring groove, and a certain amount of elastic conductive filler material is injected into the ring groove to fill the gap between the coil and the shielding shell and the seams of the shielding shell itself. This step bonds the coil and the shielding shell into a dense ring-shaped structure, further improving the shielding performance of the shielding shell and firmly fixing the coil inside the shielding shell, thereby improving the stability of the current transformer.

[0039] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A plug-in sealed current transformer shielding shell, characterized in that, include: Ring groove, ring cover, locking assembly; The annular groove includes a first half-annular groove and a second half-annular groove. The splicing ends of the first half-annular groove are provided with an annular groove protrusion joint or an annular groove concave joint. The splicing ends of the second half-annular groove are provided with an annular groove concave joint or an annular groove protrusion joint. When the first half-annular groove and the second half-annular groove are spliced ​​together, the splicing ends are respectively fitted with the annular groove concave joint and the annular groove protrusion joint in a staggered insertion manner. The locking component is disposed on the outer ring sidewall of the end of the first semi-annular groove and the second semi-annular groove to form a fixed connection between the first semi-annular groove and the second semi-annular groove. The ring cover includes a first half-ring cover and a second half-ring cover. The splicing ends of the first half-ring cover are provided with ring cover protrusions or ring cover concave joints. The splicing ends of the second half-ring cover are provided with ring cover concave joints or ring cover protrusions. When the first half-ring cover and the second half-ring cover are spliced ​​together, the splicing ends are respectively staggered and overlapped by the ring cover concave joints and the ring cover protrusions. The annular groove is provided with an inner annular boss and an outer annular boss. When the annular cover is engaged with the annular groove, the inner edge of the annular cover abuts against the inner annular boss, the outer edge of the annular cover abuts against the outer annular boss, and the annular cover is fitted into the opening of the annular groove.

2. The plug-in sealed transformer shielding shell according to claim 1, characterized in that: The locking assembly includes a first connecting ear, a second connecting ear, and a fastener. The first connecting ear is fixed to the outer side wall of the end of the first semi-annular groove, the second connecting ear is fixed to the outer side wall of the end of the second semi-annular groove, and the fastener secures the first connecting ear and the second connecting ear together.

3. The plug-in sealed transformer shielding shell according to claim 2, characterized in that: One of the first connecting ear and the second connecting ear is provided with a positioning post, and the other of the first connecting ear and the second connecting ear is provided with a positioning hole. The positions of the positioning post and the positioning hole are in one-to-one correspondence. When the first connecting ear and the second connecting ear are aligned, the positioning post is inserted into the positioning hole.

4. The plug-in sealed transformer shielding shell according to claim 2, characterized in that: The first connecting ear and the second connecting ear are respectively provided with bolt holes at corresponding positions, and the fastener is a bolt.

5. The plug-in sealed transformer shielding shell according to any one of claims 1 to 4, characterized in that: The annular groove, annular cover, and locking assembly are all made of high-permeability nickel-based alloy.

6. A current transformer, comprising a shielding shell, a coil, and an elastic conductive filler material as described in any one of claims 1 to 5, characterized in that: The gap between the coil and the shielding shell, as well as all seams of the shielding shell, are filled with the elastic conductive filler material.

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