Nested combined mutual inductor

Abstract

The utility model provides a nested combined mutual inductor, and relates to the technical field of mutual inductors. The nested combined mutual inductor comprises a plurality of wire cores, coils are wound on the wire cores, one side of a packaging shell is connected with a front cover, a plurality of threading holes are uniformly formed in the front cover, a plurality of mounting cavities are uniformly formed in the packaging shell, a plurality of locking cabins are annularly arranged in the mounting cavities, and the locking cabins are arranged in the mounting cavities. The locking cabin and the threading hole coaxially correspond to each other; the mounting seat comprises a base and a sealing cap which are arranged at the two ends of the wire core, the base is detachably connected with the locking cabin, one end of the base is coaxially and fixedly connected with a supporting frame, the supporting frame is in damping sliding connection with the sealing cap, and the wire core wound with a coil is arranged on the mounting seat in a sleeving mode. The mounting seats and the corresponding locking cabins are mounted in a rotary insertion and positioning manner, and the wire cores can be directly and quickly mounted and dismounted in the packaging shell through the threading holes, so that the maintenance efficiency of the wire cores in the mutual inductor is improved.

Description

Technical Field

[0001] This application relates to the field of current transformer technology, and more specifically, to a nested combined current transformer. Background Technology

[0002] In the prior art, for example, a combined current transformer disclosed in CN221783068U includes a package housing, a back cover plate snapped onto the back of the package housing, a terminal block fixedly provided at the top of the package housing, and the interior of the package housing is divided into multiple equipment cavities by two partitions. An iron core is fixedly installed inside each of the multiple equipment cavities, positioning components are provided on both sides of the iron core, and a coil is wound on the surface of the iron core.

[0003] This design, formed by combining three iron cores, can accommodate multiple power lines passing through. Adjacent iron cores are separated by partitions, and electromagnetic shielding plates are nested inside the partitions to avoid mutual interference between the iron cores, thus improving measurement accuracy. The positioning components set between the iron cores and the equipment cavity can limit and fix the iron cores, effectively improving the stability of the iron core installation. During use, it is prevented from the iron cores from shifting due to external forces, which would affect the measurement accuracy.

[0004] However, the method of fixing the iron core in this scheme is rather cumbersome. If the coil on one of the iron cores of the combined current transformer burns out during use and needs to be repaired or disassembled, the entire back cover plate needs to be removed and then the iron core to be replaced or maintained needs to be removed by turning the rotating rod, which makes the maintenance operation of the current transformer quite cumbersome. Utility Model Content

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a nested combined current transformer, which aims to improve the problem that the existing combined current transformer has a cumbersome method of fixing the internal iron core, affecting the maintenance efficiency of the transformer.

[0006] This application proposes a nested combined current transformer, comprising multiple cores with coils wound on them. The cores are evenly installed within a housing. A front cover is detachably connected to one side of the housing, and multiple through holes are evenly arranged on the front cover. Multiple distinct mounting cavities corresponding to the cores are evenly arranged within the housing, and an electromagnetic shielding plate is inserted between adjacent mounting cavities. Multiple locking chambers are arranged in a ring within each mounting cavity, and the locking chambers are coaxially corresponding to the through holes. A mounting base is coaxially inserted into each core, and the mounting base includes a base and a cap at both ends of the core. The base and the ring-shaped locking chambers are detachably connected. A support frame is coaxially fixed to the end of the base facing the core, and the support frame and the cap are damped and slidably connected.

[0007] According to an embodiment of this application, a nested combined current transformer has the following advantages: the wire core with the coil wound is placed on the mounting base, and the mounting base and the corresponding locking compartment are installed by means of rotational insertion and positioning. The wire core can be quickly installed and removed directly in the encapsulation shell through the wire hole, thereby improving the maintenance efficiency of the wire core inside the current transformer.

[0008] In addition, a nested combined current transformer according to an embodiment of this application also has the following additional technical features:

[0009] In some specific embodiments of this application, a terminal block is provided on the outer wall of the encapsulation shell.

[0010] In some specific embodiments of this application, an insulating chamber is provided between two adjacent mounting cavities, and the electromagnetic shielding plate is inserted into the insulating chamber.

[0011] In some specific embodiments of this application, the outward-facing side of the locking chamber is an L-shaped cavity, and the inward-facing side of the locking chamber is an arc-shaped cavity. The L-shaped cavity is also arc-shaped, and the arc shape of the L-shaped cavity is the same as that of the arc-shaped cavity. The L-shaped cavity and the arc-shaped cavity are connected.

[0012] In some specific embodiments of this application, a plurality of L-shaped blocks are uniformly fixed to the base in the circumferential direction. The L-shaped blocks correspond to the locking chamber, wherein the larger end of the L-shaped block is inserted into the locking chamber, and the larger end of the L-shaped block and the locking chamber are rotatably and limitingly connected.

[0013] In some specific embodiments of this application, the support frame includes a central shaft, multiple support plates, protrusions, and insertion shafts. The central shaft is coaxially fixed to the base. The multiple support plates are circumferentially and uniformly fixed to the side walls of the central shaft, and the support plates and the inner walls of the wire cores are slidably engaged. A protrusion is provided at one end of the support plate facing the base. An insertion shaft is coaxially provided at the end of the central shaft away from the base.

[0014] In some specific embodiments of this application, the cap includes a shaft sleeve and a plurality of snap-fit ​​rods, the shaft sleeve is damped and slidably sleeved on the insert shaft, and the plurality of snap-fit ​​rods are circumferentially and uniformly fixed to the shaft sleeve.

[0015] In some specific embodiments of this application, the snap-fit ​​rod abuts against the end of the wire core away from the base, and the radial distance of the snap-fit ​​rod is smaller than the diameter of the thread hole. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a nested combined mutual inductor according to an embodiment of this application;

[0018] Figure 2 This is a partial structural explosion of a nested combined current transformer according to an embodiment of this application. Figure 1 ;

[0019] Figure 3 This is a partial structural explosion of a nested combined current transformer according to an embodiment of this application. Figure 2 ;

[0020] Figure 4 This is an exploded view of the mounting base according to an embodiment of this application.

[0021] Icons: 1. Encapsulation shell; 11. Front cover; 111. Wiring hole; 12. Terminal block; 13. Mounting cavity; 14. Insulation chamber; 15. Electromagnetic shielding plate; 16. Locking chamber; 161. L-shaped cavity; 162. Arc-shaped cavity; 2. Wire core; 3. Mounting base; 31. Base; 311. L-shaped block; 32. Support frame; 321. Central shaft; 322. Support plate; 323. Protrusion; 324. Insert shaft; 33. Sealing cap; 331. Shaft cylinder; 332. Connecting rod. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] like Figures 1-4 As shown, a nested combined current transformer according to an embodiment of this application includes multiple wire cores 2, with coils wound on the wire cores 2, wherein the multiple wire cores 2 are uniformly installed inside the encapsulation shell 1.

[0024] Specifically, such as Figure 1As shown, a front cover 11 is detachably connected to one side of the encapsulation shell 1. Multiple wire holes 111 are evenly arranged on the front cover 11, and a terminal block 12 is provided on the outer wall of the encapsulation shell 1.

[0025] like Figure 2 As shown, multiple different mounting cavities 13 corresponding to the wire core 2 are uniformly arranged inside the encapsulation shell 1. An electromagnetic shielding plate 15 is inserted between two adjacent mounting cavities 13. Specifically, an insulating chamber 14 is arranged between two adjacent mounting cavities 13, and the electromagnetic shielding plate 15 is inserted into the insulating chamber 14.

[0026] like Figure 2 and Figure 3 As shown, multiple locking chambers 16 are arranged in a ring inside the mounting cavity 13. The locking chambers 16 and the wire hole 111 are coaxially corresponding. Specifically, the side of the locking chamber 16 facing outward is an L-shaped cavity 161, and the side of the locking chamber 16 facing inward is an arc-shaped cavity 162. The L-shaped cavity 161 is also arc-shaped. The arc shape of the L-shaped cavity 161 is the same as that of the arc shape of the arc-shaped cavity 162. The L-shaped cavity 161 and the arc-shaped cavity 162 are connected.

[0027] like Figures 2-4 As shown, a mounting base 3 is coaxially inserted into the wire core 2. The mounting base 3 includes a base 31 and a cap 33 disposed at both ends of the wire core 2. The base 31 and the locking chamber 16 arranged in annular shape are detachably connected. A support frame 32 is coaxially fixed to one end of the base 31 facing the wire core 2. The support frame 32 and the cap 33 are connected in a damped sliding connection.

[0028] Specifically, multiple L-shaped blocks 311 are evenly fixed to the base 31 in the circumferential direction. The L-shaped blocks 311 correspond to the locking chamber 16. The larger end of the L-shaped block 311 is inserted into the locking chamber 16. The larger end of the L-shaped block 311 and the locking chamber 16 are rotated and limited to be connected.

[0029] Therefore, when the mounting base 3 is inserted into the locking chamber 16, the large end of the L-shaped block 311 is first aligned with the radially arranged part of the L-shaped cavity 161. At this time, the L-shaped block 311 can be directly inserted into the arc-shaped cavity 162. Then, the mounting base 3 is rotated. At this time, the large end of the L-shaped block 311 will be axially limited by the L-shaped cavity 161, that is, the mounting base 3 will not fall out of the locking chamber 16, thus achieving the installation effect.

[0030] Specifically, such as Figure 4 As shown, the support frame 32 includes a central shaft 321, multiple support plates 322, a protrusion 323, and a shaft insertion 324. The central shaft 321 is coaxially fixed to the base 31. The multiple support plates 322 are circumferentially and uniformly fixed to the side wall of the central shaft 321, and the support plates 322 and the inner wall of the wire core 2 are slidably engaged. A protrusion 323 is provided at the end of the support plate 322 facing the base 31. A shaft insertion 324 is coaxially provided at the end of the central shaft 321 away from the base 31.

[0031] The cap 33 includes a shaft sleeve 331 and multiple locking rods 332. The shaft sleeve 331 is damped and slidably sleeved on the insert shaft 324, and the multiple locking rods 332 are circumferentially and uniformly fixed to the shaft sleeve 331.

[0032] The locking rod 332 abuts against the end of the wire core 2 away from the base 31, and the radial distance of the outer periphery of the locking rod 332 is smaller than the diameter of the wire hole 111.

[0033] Therefore, it can be seen that the wire core 2 can only be fitted onto the support plate 322, and its two ends are respectively secured by the protrusion 323 and the snap-fit ​​rod 332. It should be noted that the entire material of the mounting base 3 is made of insulating material, so that the wire core 2 will not come into contact with other components inside the encapsulation shell 1. The damping sliding connection of the insert shaft 324 and the shaft cylinder 331 will limit the wire core 2 and prevent it from falling off the support plate 322. The base 31, through the rotational limiting cooperation between the L-shaped block 311, the L-shaped cavity 161 and the arc cavity 162, allows the entire mounting base 3 and the locking chamber 16 to form a quick connection and disassembly, which is convenient for the replacement and maintenance of the wire core 2.

[0034] It should be noted that the specific model and specifications of the electromagnetic shielding plate 15 and the wire core 2 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0035] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A nested combined current transformer, comprising a plurality of cores (2) on which coils are wound, characterized in that: a plurality of the cores (2) are uniformly arranged in an encapsulating shell (1), one side of the encapsulating shell (1) is detachably connected with a front cover (11), a plurality of threading holes (111) are uniformly arranged on the front cover (11), a plurality of mounting cavities (13) which are different from each other and correspond to the cores (2) are uniformly arranged in the encapsulating shell (1), and an electromagnetic shielding plate (15) is inserted between two adjacent mounting cavities (13); a plurality of locking cabins (16) are annularly arranged in the mounting cavities (13), and the locking cabins (16) are coaxially corresponding to the threading holes (111); a mounting base (3) is coaxially inserted on the core (2), the mounting base (3) comprises a base (31) arranged at both ends of the core (2) and a cap (33), the base (31) is detachably connected with the annularly arranged locking cabin (16), and one end of the base (31) facing the core (2) is coaxially fixedly connected with a support frame (32), and the support frame (32) is in damping sliding connection with the cap (33). A wiring seat (12) is arranged on the outer wall of the encapsulating shell (1).

2. A nested combination transformer as claimed in claim 1, wherein, An insulation cabin (14) is arranged between two adjacent mounting cavities (13), and the electromagnetic shielding plate (15) is inserted into the insulation cabin (14).

3. A nested combination transformer as claimed in claim 1, wherein, One side of the locking cabin (16) outward is an L-shaped cavity (161), one side of the locking cabin (16) inward is an arc-shaped cavity (162), the L-shaped cavity (161) is also arranged in an arc shape, the arc shape of the L-shaped cavity (161) is the same as that of the arc-shaped cavity (162), and the L-shaped cavity (161) and the arc-shaped cavity (162) are communicated.

4. A nested combination transformer as claimed in claim 1, wherein, A plurality of L-shaped blocks (311) are circumferentially and uniformly fixed on the base (31), the L-shaped blocks (311) correspond to the locking cabins (16), wherein the big end of the L-shaped block (311) is inserted into the locking cabin (16), and the big end of the L-shaped block (311) is in rotating and limiting connection with the locking cabin (16).

5. A nested combination transformer as claimed in claim 1, wherein, The support frame (32) comprises:

6. A nested combination transformer as claimed in claim 1, wherein, a middle shaft (321) coaxially fixedly connected with the base (31); a plurality of support plates (322) circumferentially and uniformly fixedly connected with the side wall of the middle shaft (321), the support plates (322) are in sliding fit with the inner wall of the core (2); a protruding part (323) arranged on one end of the support plate (322) facing the base (31); an insertion shaft (324) coaxially arranged on one end of the middle shaft (321) away from the base (31). The cap (33) comprises a shaft cylinder (331) and a plurality of clamping rods (332), the shaft cylinder (331) is in damping sliding fit on the insertion shaft (324), and the plurality of clamping rods (332) are circumferentially and uniformly fixed on the shaft cylinder (331).

7. A nested combination transformer as claimed in claim 6, wherein, ​ 8. A nested combination transformer as claimed in claim 7, wherein, The clamping rod (332) is abutted to one end of the wire core (2) away from the base (31), and the peripheral radial distance of the clamping rod (332) is less than the diameter of the threading hole (111).

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