External current transformer coil fixing and protecting structure

Abstract

The utility model discloses an external current transformer coil fixing protection structure which comprises an aluminum cylinder, a plurality of coil assemblies are evenly distributed on the aluminum cylinder, the coil assemblies are connected in series and stacked, each coil assembly comprises a first sleeve, the first sleeves are connected to the aluminum cylinder in a sleeved mode, the adjacent first sleeves are in threaded connection, and the first sleeves are connected with the aluminum cylinder in a sleeved mode. A shell is fixedly connected to the first sleeve, a rubber sleeve is connected in the shell in a sleeved mode, a coil body is connected in the rubber sleeve in a sleeved mode, and a second sleeve is installed on the topmost coil assembly; according to the utility model, superposition and series connection between the shells are realized by using the first sleeve in threaded connection, so that protection isolation and position locking between the coil bodies are realized, and the coil assembly is limited by using the snap spring, so that the coil assembly cannot rotate and axially move on the aluminum cylinder, and thus the position locking between the coil assembly and the aluminum cylinder is realized; according to the design, the stability of the coil assembly is met, and meanwhile installation and follow-up maintenance work are greatly facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, and particularly relates to an external current transformer coil fixing and protecting structure. Background Technique

[0002] An external current transformer is a type of current transformer, and its coil is sleeved outside an aluminum cylinder. Generally, the coils of the existing external current transformers and between the coil and the aluminum cylinder are fixed by bonding with glue. This potting structure can achieve the functions of moisture-proof, dust-proof, and insulation protection, but there are still the following defects: First, due to the potting structure being in a high-temperature state for a long time, the glue is prone to aging, resulting in a decline in the protection effect and affecting the stability of the coil; second, using glue to bond and fix between the coils and between the coil and the aluminum cylinder will increase the difficulty and cost of subsequent maintenance. Content of the Utility Model

[0003] The purpose of the utility model is to provide an external current transformer coil fixing and protecting structure to solve the problems raised in the above background technique.

[0004] To solve the above technical problems, the utility model provides the following technical solution: An external current transformer coil fixing and protecting structure includes an aluminum cylinder, on which a plurality of coil assemblies are evenly distributed, and the plurality of coil assemblies are connected in series and stacked. The coil assembly includes a first sleeve, and the first sleeve is sleeved on the aluminum cylinder. Adjacent first sleeves are connected by threads. A housing is fixedly connected to the first sleeve, a rubber sleeve is sleeved inside the housing, and a coil body is sleeved inside the rubber sleeve. A second sleeve is installed on the topmost coil assembly, and the second sleeve is threadedly connected to the first sleeve. A pressing plate is fixedly connected to the second sleeve, and the pressing plate is arranged at the top end of the housing.

[0005] Preferably, a first internal thread is provided on the inner wall of the first sleeve, and an external thread is provided on the outer wall of the first sleeve.

[0006] Preferably, a first groove is provided on the lower surface of the housing, and a convex ring is fixedly connected to the housing at a position corresponding to the first groove on the upper surface.

[0007] Preferably, a second groove is provided on the lower surface of the pressing plate at a position corresponding to the convex ring.

[0008] Preferably, a terminal is fixedly penetrated through the outer wall of the housing, and the terminal is electrically connected to the coil body.

[0009] Preferably, a second internal thread is provided on the inner wall of the second sleeve.

[0010] Preferably, a snap ring is provided at the top end of the second sleeve. A second limiting groove is formed on the inner wall of the snap ring. A first limiting block is arranged in the second limiting groove, and the first limiting block is fixedly connected to the upper surface of the second sleeve. A second limiting block is fixedly connected to the inner wall of the snap ring.

[0011] Preferably, a groove is formed on the aluminum cylinder corresponding to the position of the snap ring, and the snap ring is arranged in the groove. A first limiting groove is formed in the groove corresponding to the position of the second limiting block, and the second limiting block is arranged in the first limiting groove.

[0012] An external current transformer coil fixing and protecting structure provided by the utility model has the following advantages: The utility model realizes the superposition and series connection of the shells by using the first sleeve connected by threads, so as to realize the protection isolation and position locking between the coil bodies. The utility model uses a snap ring to limit the coil assembly, so that it cannot rotate and axially move on the aluminum cylinder, thus realizing the position locking between the coil assembly and the aluminum cylinder. This design not only meets the stability of the coil assembly, but also greatly facilitates the installation and subsequent maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic front view structure diagram of the whole of the present utility model;

[0015] Figure 2 It is a schematic three-dimensional sectional structure diagram of the aluminum cylinder of the present utility model;

[0016] Figure 3 It is an exploded view of the schematic front view sectional structure of the coil assembly of the present utility model;

[0017] Figure 4 It is a schematic front view sectional structure diagram of the second sleeve of the present utility model;

[0018] Figure 5 It is a schematic three-dimensional structure diagram of the snap ring of the present utility model.

[0019] In the figure: 1. Aluminum cylinder; 11. Groove; 12. First limiting groove; 2. Coil assembly; 21. First sleeve; 22. First internal thread; 23. External thread; 24. Housing; 25. First groove; 26. Convex ring; 27. Terminal; 28. Rubber sleeve; 29. Coil body; 3. Second sleeve; 31. Second internal thread; 32. First limiting block; 33. Pressure plate; 34. Second groove; 4. Snap ring; 41. Second limiting groove; 42. Second limiting block. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to the attached Figure 1 - attached Figure 5, an embodiment provided by the present utility model: an external current transformer coil fixing and protecting structure, which includes an aluminum cylinder 1. A plurality of coil assemblies 2 are evenly distributed on the aluminum cylinder 1, and the plurality of coil assemblies 2 are connected in series and stacked. The coil assembly 2 includes a first sleeve 21, and the first sleeve 21 is sleeved on the aluminum cylinder 1. The adjacent first sleeves 21 are connected by threads. A housing 24 is fixedly connected to the first sleeve 21. A rubber sleeve 28 is sleeved inside the housing 24, and a coil body 29 is sleeved inside the rubber sleeve 28. A second sleeve 3 is installed on the topmost coil assembly 2, and the second sleeve 3 is threadedly connected to the first sleeve 21. A pressing plate 33 is fixedly connected to the second sleeve 3, and the pressing plate 33 is arranged at the top end of the housing 24. The rubber sleeve 28 and the housing 24 are used to protect the coil body 29. The housings 24 are connected by the first sleeve 21. The pressing plate 33 is used to seal the topmost housing 24. The pressing plate 33 and the first sleeve 21 are connected by the second sleeve 3; a first internal thread 22 is provided on the inner wall of the first sleeve 21, and an external thread 23 is provided on the outer wall of the first sleeve 21. The first internal thread 22 is used to cooperate with the external thread 23 to achieve threaded connection; a first groove 25 is provided on the lower surface of the housing 24, and a convex ring 26 is fixedly connected to the position of the upper surface of the housing 24 corresponding to the first groove 25. The first groove 25 is used to accommodate the convex ring 26 to improve the sealing performance; a second groove 34 is provided on the lower surface of the pressing plate 33 corresponding to the position of the convex ring 26. The second groove 34 is used to accommodate the convex ring 26 to improve the sealing performance; a terminal 27 is fixedly penetrated through the outer wall of the housing 24, and the terminal 27 is electrically connected to the coil body 29. The terminal 27 is used for wiring; a second internal thread 31 is provided on the inner wall of the second sleeve 3. The second internal thread 31 is used to cooperate with the external thread 23 to achieve threaded connection; a snap ring 4 is provided at the top end of the second sleeve 3. A second limiting groove 41 is provided on the inner wall of the snap ring 4, and a first limiting block 32 is arranged in the second limiting groove 41, and the first limiting block 32 is fixedly connected to the upper surface of the second sleeve 3. A second limiting block 42 is fixedly connected to the inner wall of the snap ring 4. The snap ring 4 is used to limit the second sleeve 3, and the second limiting groove 41 is used to accommodate the first limiting block 32; a groove 11 is provided on the aluminum cylinder 1 corresponding to the position of the snap ring 4, and the snap ring 4 is arranged in the groove 11. A first limiting groove 12 is provided in the groove 11 corresponding to the position of the second limiting block 42, and the second limiting block 42 is arranged in the first limiting groove 12. The groove 11 is used to accommodate the snap ring 4, and the first limiting groove 12 is used to accommodate the second limiting block 42.

[0022] Working principle: When assembling and using the present utility model, first place the coil body 29 wrapped by the rubber sleeve 28 in the housing 24, install another housing 24 on the housing 24 containing the coil body 29, and achieve assembly through the threaded connection between the first sleeves 21. At this time, the bottom of the housing 24 closes the top of another housing 24 to achieve sealing. After completing the series assembly of all the coil assemblies 2 in this way, thread the second sleeve 3 onto the first sleeve 21 of the topmost coil assembly 2, so that the pressure plate 33 closes the housing 24. Then, put the assembled coil assembly 2 on the aluminum cylinder 1, install the snap ring 4 in the groove 11, so that the second limit block 42 is sleeved in the first limit groove 12, and the first limit block 32 is sleeved in the second limit groove 41 to prevent the rotation of the coil assembly 2. The snap ring 4 will prevent the axial movement of the coil assembly 2 on the aluminum cylinder 1; wherein, the first internal thread 22 is used to cooperate with the external thread 23 to achieve threaded connection, the second internal thread 31 is used to cooperate with the external thread 23 to achieve threaded connection, the first groove 25 and the second groove 34 are used to accommodate the convex ring 26 to improve the sealing performance, and the terminal 27 is used for wiring.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] The device embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. An external current transformer coil fixing and protecting structure, comprising an aluminum cylinder (1), characterized in that: A plurality of coil assemblies (2) are evenly distributed on the aluminum cylinder (1), and the plurality of coil assemblies (2) are connected in series and stacked. The coil assembly (2) includes a first sleeve (21), and the first sleeve (21) is sleeved on the aluminum cylinder (1). Adjacent first sleeves (21) are connected by threads. A housing (24) is fixedly connected to the first sleeve (21). A rubber sleeve (28) is sleeved in the housing (24). A coil body (29) is sleeved in the rubber sleeve (28). A second sleeve (3) is installed on the topmost coil assembly (2), and the second sleeve (3) is threadedly connected to the first sleeve (21). A pressing plate (33) is fixedly connected to the second sleeve (3), and the pressing plate (33) is arranged at the top end of the housing (24).

2. The external current transformer coil fixing and protecting structure according to claim 1, characterized in that: A first internal thread (22) is provided on the inner wall of the first sleeve (21), and an external thread (23) is provided on the outer wall of the first sleeve (21).

3. An external current transformer coil fixing and protecting structure according to claim 1, characterized in that: A first groove (25) is provided on the lower surface of the housing (24), and a convex ring (26) is fixedly connected to the housing (24) at a position corresponding to the first groove (25) on the upper surface.

4. An external current transformer coil fixing and protecting structure according to claim 1, characterized in that: A second groove (34) is provided on the lower surface of the pressing plate (33) at a position corresponding to the convex ring (26).

5. The fixed protection structure for an external current transformer coil according to claim 3, characterized in that: A terminal (27) is fixedly penetrated through the outer wall of the housing (24), and the terminal (27) is electrically connected to the coil body (29).

6. The external current transformer coil fixing and protecting structure according to claim 1, wherein: A second internal thread (31) is provided on the inner wall of the second sleeve (3).

7. An external current transformer coil fixing and protecting structure according to claim 6, characterized in that: A snap ring (4) is provided at the top end of the second sleeve (3). A second limiting groove (41) is provided on the inner wall of the snap ring (4). A first limiting block (32) is arranged in the second limiting groove (41), and the first limiting block (32) is fixedly connected to the upper surface of the second sleeve (3). A second limiting block (42) is fixedly connected to the inner wall of the snap ring (4).

8. An external current transformer coil fixing and protecting structure according to claim 1, characterized in that: A groove (11) is provided on the aluminum cylinder (1) at a position corresponding to the snap ring (4), and the snap ring (4) is arranged in the groove (11). A first limiting groove (12) is provided in the groove (11) at a position corresponding to the second limiting block (42), and the second limiting block (42) is arranged in the first limiting groove (12).

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