Current transformer with compact structure

Abstract

The utility model belongs to the technical field of electrical elements, and particularly relates to a current transformer with a compact structure, which comprises a first shell and a second shell, an insulating part is arranged in the first shell and the second shell, a secondary coil is wrapped and mounted on the insulating part, the secondary coil is electrically connected with two lead-out wires, and the lead-out wires are connected with the first shell and the second shell. The free ends of the two outgoing lines penetrate through the insulating part and the second shell to the outside of the second shell, the two copper terminals are arranged in the secondary coil in a penetrating mode, and the insulating part, the first shell and the second shell are provided with openings for the two copper terminals to stretch out. The current transformer further comprises fixing assemblies used for connecting the first shell and the second shell, the number of the fixing assemblies is two, the fixing assemblies are arranged on the outer walls of the two sides of the first shell and the outer walls of the two sides of the second shell respectively, the installation direction of the current transformer can be transverse or vertical, and the applicability of the current transformer is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical components, and in particular relates to a current transformer with a compact structure. Background Art

[0002] Current transformer (CT) converts a larger primary current into a smaller secondary current through a certain transformation ratio based on the principle of electromagnetic induction. It is mainly used for line protection, current measurement, electrical isolation, etc.

[0003] Chinese utility model patent CN218826614U discloses a current transformer with high strength and compact structure, including: a shell, two metal covers arranged in the shell, two rubber insulating pads arranged in the two metal covers, a secondary coil arranged in the two rubber insulating pads, and a copper terminal passing through the secondary coil. The shell is flat and cylindrical as a whole, and includes a first cover shell with a semicircular cross section, and a second cover shell with a semicircular cross section arranged on one side of the first cover shell. The copper terminal includes a first pin arranged on one side of the secondary coil, and a second pin passing through the secondary coil.

[0004] In the above-mentioned technical patent solution, the convex second step portion of the second cover shell can be inserted into the concave first step portion of the first cover shell to achieve close splicing of the two cover shells. However, this splicing method makes the first cover shell and the second cover shell only able to be set up and down, but not left and right. When the current transformer is vibrated, the left and right setting will cause the first cover shell and the second cover shell to separate. The installation direction of the current transformer (horizontal or vertical) may be affected by space limitations or the installation environment. Therefore, the applicability of the device is poor. Utility Model Content

[0005] The purpose of the utility model is to provide a current transformer with a compact structure in view of the above-mentioned technical problems, so that the installation direction of the current transformer can be either horizontal or vertical, and the applicability is relatively high.

[0006] In view of this, the utility model provides a compact current transformer, comprising: a first shell and a second shell, wherein an insulating member is provided in the first shell and the second shell, wherein a secondary coil is wrapped and installed on the insulating member, wherein the secondary coil is electrically connected to two lead wires, wherein the free ends of the two lead wires pass through the insulating member and the second shell to the outside of the second shell, and wherein two copper terminals are provided in the secondary coil, wherein the insulating member, the first shell and the second shell are provided with openings for extending the two copper terminals, and wherein the utility model further comprises: a fixing assembly for connecting the first shell and the second shell, wherein the fixing assembly is provided in two groups and is respectively provided on the outer walls on both sides of the first shell and the second shell.

[0007] In the above technical solution, further, the abutting parts of the first shell and the second shell are respectively provided with outer protrusions and inner recesses, and the first shell and the second shell are spliced ​​together through the outer protrusions and the inner recesses.

[0008] In the above technical solution, further, the fixing assembly includes:

[0009] A fixing block, which is arranged on the side wall of the first shell and located at the connection between the first shell and the second shell;

[0010] A concave block with an inwardly concave outer side surface, the concave block is arranged on the side wall of the second shell and is located at the connection between the first shell and the second shell;

[0011] Wherein, a fixing piece is movably connected inside the fixing block.

[0012] In the above technical solution, further, the fixing member includes: a rotating rod, which is movably connected in the fixing block, and the bottom end of the rotating rod passes through the fixing block and the bottom surface of the concave block and is connected to a limiting plate.

[0013] In the above technical solution, further, a turning knob is connected to the top of the rotating rod, a limiting rod is provided on the side of the turning knob away from the rotating rod, and a limiting groove is provided on the upper surface of the fixing block for the bottom end of the limiting rod to be inserted.

[0014] In the above technical solution, further, a lifting block is provided at the top end of the limiting rod, a return spring is fixedly connected between the lifting block and the turning knob, and the return spring is sleeved on the limiting rod.

[0015] In the above technical solution, further, two threading posts are horizontally provided on the side wall of the second shell, and the two lead-out wires pass from the threading posts to the outside of the second shell. A baffle is provided between the two threading posts, and arc blocks are provided on both sides of the baffle, and the two arc blocks are respectively connected to the outer walls of the two threading posts.

[0016] In the above technical solution, further, the copper terminal includes: a first pin, the first pin is arranged on one side of the secondary coil, and a second pin passing through the secondary coil, the second pin is arranged parallel to the first pin, and the ends of the two pins are flush.

[0017] The beneficial effects of the utility model are:

[0018] 1. By means of two sets of fixing components respectively arranged on the outer walls of both sides of the first shell and the second shell, when the first shell and the second shell are assembled together, the current transformer can be installed in a variety of directions, whether horizontally or vertically, through the two sets of fixing components, the stability of the structure can be ensured, thereby improving the applicability of the equipment.

[0019] 2. By setting two threading posts, the lead wires can be passed from the second shell to the outside of the shell in an orderly manner, and under the action of the baffle and the two arc blocks, the phenomenon of two lines being entangled and short-circuited can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a compact current transformer of the utility model which is arranged horizontally;

[0021] Figure 2 It is a schematic diagram of a compact current transformer vertically arranged in the utility model;

[0022] Figure 3 This is a partial exploded diagram of a compact current transformer of the utility model;

[0023] Figure 4 This utility model is a compact current transformer Figure 2 A magnified image of point A;

[0024] The symbols in the figure are:

[0025] 1. First shell; 2. Second shell; 3. Opening; 4. Fixed assembly; 401. Fixed block; 402. Concave block; 403. Turning rod; 404. Limiting plate; 405. Turning knob; 406. Limiting rod; 407. Pulling block; 408. Reset spring; 5. Copper terminal; 6. Lead wire; 7. Limiting block; 8. First pin; 9. Second pin; 10. Outward protrusion; 11. Inward concave; 12. Secondary coil; 13. Insulating member; 14. Wire post; 15. Arc block; 16. Baffle. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0027] In the description of the present application, 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. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0029] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0030] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0031] Embodiment 1:

[0032] Depend on Figure 1-4 As shown, this embodiment provides a compact current transformer including: a first shell 1 and a second shell 2, wherein an insulating member 13 is provided inside the first shell 1 and the second shell 2 (the insulating member 13 is a metal cover and a rubber insulating pad of the comparative document CN218826614U), wherein the insulating member 13 wraps and installs a secondary coil 12, wherein the secondary coil 12 is electrically connected with two lead wires 6, wherein the free ends of the two lead wires 6 pass through the insulating member 13 and the second shell 2 to the outside of the second shell 2, and there are two copper terminals 5 passing through the secondary coil 12, wherein the insulating member 13, the first shell 1 and the second shell 2 are provided with an opening 3 for the two copper terminals 5 to extend out, and wherein the fixing member 4 is provided with two groups and respectively arranged on the outer walls of both sides of the first shell 1 and the second shell 2.

[0033] By means of two sets of fixing components 4 respectively arranged on the outer walls of both sides of the first shell 1 and the second shell 2, when the first shell 1 and the second shell 2 are assembled together, the current transformer can be installed in a variety of directions through the two sets of fixing components 4, whether horizontally or vertically, to ensure the stability of the structure, thereby improving the applicability of the equipment.

[0034] Furthermore, the first shell 1 and the second shell 2 are respectively provided with an outer protrusion 10 and an inner recess 11 at the joint part, and the first shell 1 and the second shell 2 are spliced ​​together through the outer protrusion 10 and the inner recess 11. The first shell 1 and the second shell 2 are respectively provided with an outer protrusion 10 and an inner recess 11 at the joint part to achieve accurate and stable splicing of the two shells, which is convenient for the subsequent fixing component 4 to limit the splicing of the first shell 1 and the second shell 2.

[0035] Furthermore, the fixing assembly 4 comprises: a fixing block 401, the fixing block 401 is arranged on the side wall of the first shell 1 and is located at the connection between the first shell 1 and the second shell 2; a concave block 402 with an inward concave 11 on the outer side, the concave block 402 is arranged on the side wall of the second shell 2 and is located at the connection between the first shell 1 and the second shell 2; wherein a fixing part is movably connected inside the fixing block 401. The fixing part comprises: a rotating rod 403, the rotating rod 403 is movably connected in the fixing block 401, and the bottom end of the rotating rod 403 passes through the fixing block 401 and is connected to a limiting plate 404 on the bottom surface of the concave block 402. A turning knob 405 is connected to the top of the rotating rod 403, and a limiting rod 406 is provided on the side of the turning knob 405 away from the rotating rod 403, and a limiting groove is provided on the upper surface of the fixing block 401 for the bottom end of the limiting rod 406 to be inserted. A lifting block 407 is disposed at the top of the limiting rod 406 . A return spring 408 is fixedly connected between the lifting block 407 and the knob 405 . The return spring 408 is sleeved on the limiting rod 406 .

[0036] After the protrusion 10 of the first shell 1 is inserted into the recess 11 of the second shell 2, the limiting plate 404 at the bottom end of the rotating rod 403 on the fixed block 401 passes through the recess 402 and the bottom of the recess 402 (at this time, the limiting plate 404 passes through the recess 11 of the vertical outer side surface of the recess 402). At this time, a part of the limiting rod 406 is on the front side of the fixed block 401. Pull the lifting block 407 upward, the limiting rod 406 moves upward, and then rotate the rotating rod 403 to rotate the limiting rod 406 to the top of the limiting groove. At this time, the limiting plate 404 changes from vertical to horizontal, and slowly release the lifting block 407. Under the action of the spring, the limiting rod 406 is inserted into the limiting groove, thereby limiting the limiting plate 404.

[0037] Furthermore, two threading posts 14 are horizontally arranged on the side wall of the second housing 2, and the two lead wires 6 are passed from the threading posts 14 to the outside of the second housing 2, and a baffle 16 is arranged between the two threading posts 14, and arc blocks 15 are arranged on both sides of the baffle 16, and the two arc blocks 15 are respectively connected to the outer walls of the two threading posts 14. By setting two threading posts 14, the lead wires 6 can pass from the inside of the second housing 2 to the outside of the housing in an orderly manner, and under the action of the baffle 16 and the two arc blocks 15, the phenomenon of two lines being entangled and short-circuited can be avoided.

[0038] Furthermore, the copper terminal 5 includes: a first pin 8, which is arranged on one side of the secondary coil 12, and a second pin 9 passing through the secondary coil 12, the second pin 9 is arranged parallel to the first pin 8, and the ends of the two pins are flush, and two limit blocks 7 are respectively provided on both sides of the first shell 1 and the second shell 2, and the limit blocks 7 are used to limit the first pin 8 and the second pin 9.

[0039] The first pin 8 and the second pin 9 can be extended out of the housing and located on one side of the two side surfaces of the housing, respectively. The structure is compact, and can save space when installing the current transformer without hindering the installation of other components. The first pin 8 and the second pin 9 can be clamped by the limit blocks 7 on both sides of the housing, thereby improving the stability between the copper terminal 5 and the housing.

[0040] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A compact current transformer, comprising: A first shell (1) and a second shell (2), wherein an insulating member (13) is provided inside the first shell (1) and the second shell (2), wherein the insulating member (13) wraps and mounts a secondary coil (12), wherein the secondary coil (12) is electrically connected to two lead wires, wherein the free ends of the two lead wires (6) pass through the insulating member (13) and the second shell (2) to the outside of the second shell (2), and wherein two copper terminals (5) are provided inside the secondary coil (12), wherein the insulating member (13), the first shell (1) and the second shell (2) are provided with openings (3) through which the two copper terminals (5) extend, and wherein the fixing member (4) is provided in two groups and is respectively provided on the outer walls of both sides of the first shell (1) and the second shell (2).

2. A compact current transformer according to claim 1, characterized in that: The butt joints of the first shell (1) and the second shell (2) are respectively provided with an outer protrusion (10) and an inner recess (11); the first shell (1) and the second shell (2) are spliced ​​together via the outer protrusion (10) and the inner recess (11).

3. A compact current transformer according to claim 2, characterized in that: The fixing assembly (4) comprises: A fixing block (401), the fixing block (401) being arranged on a side wall of the first shell (1) and located at a connection point between the first shell (1) and the second shell (2); A concave block (402) with an inwardly concave outer side surface (11), the concave block (402) being arranged on the side wall of the second shell (2) and located at the connection between the first shell (1) and the second shell (2); Wherein, a fixing piece is movably connected inside the fixing block (401).

4. A compact current transformer according to claim 3, characterized in that: The fixing member comprises a rotating rod (403), the rotating rod (403) is movably connected in the fixing block (401), and the bottom end of the rotating rod (403) passes through the fixing block (401) and the bottom surface of the concave block (402) and is connected to a limiting plate (404).

5. A compact current transformer according to claim 4, characterized in that: The top end of the rotating rod (403) is connected to a turning knob (405), a limiting rod (406) is provided on the side of the turning knob (405) away from the rotating rod (403), and a limiting groove is provided on the upper surface of the fixing block (401) for the bottom end of the limiting rod (406) to be inserted.

6. A compact current transformer according to claim 5, characterized in that: A lifting block (407) is provided at the top of the limiting rod (406), a return spring (408) is fixedly connected between the lifting block (407) and the turning knob (405), and the return spring (408) is sleeved on the limiting rod (406).

7. A compact current transformer according to claim 1, characterized in that: Two threading posts (14) are horizontally arranged on the side wall of the second shell (2), and the two lead wires (6) pass through the threading posts (14) to the outside of the second shell (2). A baffle (16) is arranged between the two threading posts (14), and arc blocks (15) are arranged on both sides of the baffle (16). The two arc blocks (15) are respectively connected to the outer walls of the two threading posts (14).

8. A compact current transformer according to claim 1, characterized in that: The copper terminal (5) comprises: a first pin (8), the first pin (8) being arranged on one side of the secondary coil (12), and a second pin (9) passing through the secondary coil (12), the second pin (9) being arranged parallel to the first pin (8), and the ends of the two pins being flush.

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