A portable current transformer

Abstract

This utility model discloses a portable current transformer, including a housing for protecting the main body of the current transformer. The bottom of the housing has multiple evenly distributed mounting slots, and a connecting base is located at the bottom of each mounting slot. The bottom of the connecting base has multiple evenly distributed mounting holes. This utility model, through the arrangement of mounting slots, the connecting base, the mounting holes, and bolts, makes the installation and disassembly of the current transformer more convenient, facilitating installation and maintenance in different working environments. The symmetrically arranged storage slots on both sides of the connecting base, along with the limiting strips that slide within the limiting slots, allow the connecting parts to be stored entirely within the storage slots when carried or not in use. This prevents the connecting parts from being bent or damaged by external impacts or pressure during handling and transportation due to exposure, fundamentally solving the problem of easily damaged connecting parts in traditional current transformers.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, specifically a portable current transformer. Background Technology

[0002] In the monitoring and metering of power systems, current transformers play a crucial role. Based on the principle of electromagnetic induction, they convert large primary currents into smaller secondary currents, thereby enabling accurate measurement of line currents. Their structure mainly consists of a closed iron core and windings. The primary winding has fewer turns and needs to be connected in series with the line containing the current being measured.

[0003] Currently, common current transformers on the market, such as the LMZJ1 series and LMZJ-0.5 series, have certain shortcomings in their structural design. The connectors at the bottom of these transformers all extend outwards. This design has significant drawbacks in practical applications, especially during transportation. Because the connectors at the bottom of these current transformers are outwardly shaped, they are easily subjected to external impacts during handling, and can easily be bent or deformed when encountering uncontrollable factors such as bumps or compression. In severe cases, they can even be directly damaged. Once such problems occur with the connectors, it is difficult to stably fix the transformer during subsequent installation, which will greatly affect the installation efficiency and quality, thereby interfering with the normal use of the current transformer, causing many inconveniences to the operation and maintenance of the power system, increasing the cost of inspection and replacement, and also posing a potential risk to the accuracy and reliability of power monitoring.

[0004] Therefore, a portable current transformer is needed to solve this problem. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a portable current transformer. This solves the problem that some current transformers have an outward-protruding bottom connector, making them susceptible to external impacts during transportation. In addition, they are easily bent and deformed when encountering uncontrollable factors such as bumps or squeezing, which makes it difficult to stably fix the transformer during subsequent installation, greatly affecting the installation efficiency and quality.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a portable current transformer, comprising a housing for protecting the main body of the current transformer, wherein the bottom of the housing has a plurality of evenly distributed mounting slots, the bottom of the mounting slots is provided with a connecting base, the bottom of the connecting base has a plurality of evenly distributed mounting holes, and the plurality of mounting holes correspond one-to-one with the plurality of mounting slots, the bottom of the mounting holes is threaded with bolts, and the other end of the bolts is threadedly connected to the mounting slots, the two sides of the connecting base have symmetrically distributed storage slots, the inside of the storage slots has a limit groove, the inside of the limit grooves has a limit strip slidably connected, the outside of the limit strips is fixedly connected with a connector, the surface of the connecting base has symmetrically distributed positioning openings, the two ends of the limit strips have symmetrically distributed positioning slots, the inside of the positioning slots has a push-out spring fixedly connected, the other end of the push-out springs is slidably connected with a positioning block, and the positioning block is slidably connected to the positioning slots and engaged with the positioning openings.

[0007] As a preferred embodiment of this utility model, a lower box is fitted onto the surface of the housing, and a protective sponge is fixedly connected inside the lower box. An embedding groove is formed on the surface of the protective sponge, and the embedding groove fits into the housing. An upper box is hinged to the surface of the lower box, and the other end of the upper box is engaged with the lower box by a locking fastener.

[0008] As a preferred embodiment of this utility model, a guide groove is provided on the surface of the lower box, and a guide block is fixedly connected to the bottom of the upper box, and the guide block is engaged with the guide groove.

[0009] As a preferred embodiment of this utility model, a rubber pad is fixedly connected to the inner wall of the upper housing, and the rubber pad fits into the embedding groove. A snap-fit ​​post is fixedly connected to the bottom of the embedding groove, and the snap-fit ​​post snaps into the housing.

[0010] As a preferred embodiment of this utility model, the surface of the connector is symmetrically provided with sliding openings, and the sliding openings are slidably connected with the bolts, and the top of the surface of the connector is provided with a connecting hole.

[0011] As a preferred embodiment of this utility model, a reinforcing groove is provided at the bottom of the housing, and a reinforcing block is fixedly connected to the top of the connecting base, and the reinforcing block is engaged with the reinforcing groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the design of mounting slots, connecting bases, mounting holes, and bolts, makes the installation and disassembly of current transformers more convenient, facilitating installation and maintenance in various working environments. The symmetrical storage slots on both sides of the connecting base, combined with the sliding limit strip within the limiting slots, allow the connector to be stored entirely within the storage slots when carried or not in use. This prevents the connector from being bent or damaged by external forces during handling and transportation due to exposure, fundamentally solving the problem of easily damaged connectors in traditional current transformers. When the connector is needed, the ejector springs in the positioning slots at both ends of the limit strip push the positioning block out of the positioning slot and engage with the positioning port on the surface of the connecting base, quickly unfolding and positioning the connector. This ensures stable and reliable operation during working conditions, guaranteeing smooth subsequent installation and fixing of the current transformer, and effectively improving the service life and operational stability of the equipment.

[0013] 2. This utility model provides more comprehensive protection for current transformers through the combination of a lower housing, protective sponge, embedded groove, and upper housing. The protective sponge fills the lower housing, and its embedded groove fits perfectly with the housing, effectively buffering external impacts during transportation and storage, preventing the current transformer from being damaged by collisions. The upper housing and lower housing are locked together by locking fasteners, further enhancing the protective performance and ensuring that the current transformer is in a good working environment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a three-dimensional schematic diagram of the shell, lower box, and upper box of this utility model in use together; Figure 4 This is a three-dimensional schematic diagram of the lower and upper boxes of this utility model when they are closed.

[0015] In the diagram: 1. Shell; 2. Mounting slot; 3. Connecting base; 4. Mounting hole; 5. Bolt; 6. Storage slot; 7. Limiting slot; 8. Limiting strip; 9. Connector; 10. Positioning port; 11. Ejection spring; 12. Positioning block; 13. Lower housing; 14. Protective sponge; 15. Embedded slot; 16. Upper housing; 17. Guide slot; 18. Guide block; 19. Rubber pad; 20. Snap-fit ​​post; 21. Sliding port; 22. Connecting hole; 23. Reinforcing slot; 24. Reinforcing block. Detailed Implementation

[0016] 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.

[0017] like Figures 1 to 4 As shown, this utility model provides a portable current transformer, including a housing 1 for protecting the main body of the current transformer. The bottom of the housing 1 has multiple evenly distributed mounting slots 2. A connecting base 3 is provided at the bottom of each mounting slot 2. The bottom of the connecting base 3 has multiple evenly distributed mounting holes 4, each corresponding to a mounting slot 2. Bolts 5 are threaded to the bottom of each mounting hole 4, and the other end of each bolt 5 is threaded to the mounting slot 2. The connecting base 3 has symmetrically ...

[0018] refer to Figure 3 The surface of the housing 1 is fitted with a lower box 13, and a protective sponge 14 is fixedly connected inside the lower box 13. The surface of the protective sponge 14 is provided with an embedding groove 15, and the embedding groove 15 fits with the housing 1. The surface of the lower box 13 is hinged with an upper box 16, and the other end of the upper box 16 is engaged with the lower box 13 by a locking fastener.

[0019] As a technical optimization of this utility model, the combination of the lower housing 13, protective sponge 14, embedded groove 15, and upper housing 16 provides more comprehensive protection for the current transformer. The protective sponge 14 is filled inside the lower housing 13, and its embedded groove 15 fits into the housing 1, which can effectively buffer external impact forces during transportation and storage, preventing the current transformer from being damaged by collision. The upper housing 16 is locked to the lower housing 13 by a locking fastener, further enhancing the protective performance and ensuring that the current transformer is in a good working environment.

[0020] refer to Figure 3 The lower housing 13 has a guide groove 17 on its surface, and the bottom of the upper housing 16 is fixedly connected to a guide block 18, which is engaged with the guide groove 17.

[0021] As a technical optimization of this utility model, the guide groove 17 on the surface of the lower housing 13 and the guide block 18 at the bottom of the upper housing 16 cooperate with each other to provide precise guidance when the upper housing 16 is closed, making the connection between the upper housing 16 and the lower housing 13 more accurate and stable, avoiding misalignment or shaking, and enhancing the stability of the overall protective structure.

[0022] refer to Figure 3 A rubber pad 19 is fixedly connected to the inner wall of the upper housing 16, and the rubber pad 19 fits into the embedding groove 15. A snap-fit ​​post 20 is fixedly connected to the bottom of the embedding groove 15, and the snap-fit ​​post 20 snaps into the housing 1.

[0023] As a technical optimization of this utility model, the rubber pad 19 on the inner wall of the upper housing 16 fits into the embedded groove 15, which further enhances the protective effect and can buffer the impact. The snap-fit ​​post 20 at the bottom of the embedded groove 15 is snapped into the housing 1, which can more firmly fix the current transformer body in the lower housing 13, preventing the current transformer body from colliding with the inside of the housing due to shaking during transportation and causing damage.

[0024] refer to Figure 2 The surface of the connector 9 is symmetrically provided with sliding openings 21, and the sliding openings 21 are slidably connected with the bolt 5. The top of the surface of the connector 9 is provided with a connecting hole 22.

[0025] As a technical optimization of this utility model, the connector 9 is slidably connected to the bolt 5 through the sliding port 21 on the surface of the connector 9, so that the connector 9 has a certain adjustment space during the installation process and can adapt to different installation requirements; the setting of the connection hole 22 facilitates the connection of the connector 9 to other equipment or components, and improves the versatility and adaptability of the current transformer.

[0026] refer to Figure 2 The bottom of the housing 1 is provided with a reinforcing groove 23, and the top of the connecting base 3 is fixedly connected with a reinforcing block 24, and the reinforcing block 24 is engaged with the reinforcing groove 23.

[0027] As a technical optimization of this utility model, the reinforcing groove 23 at the bottom of the housing 1 is engaged with the reinforcing block 24 at the top of the connecting base 3, which can increase the connection strength between the housing 1 and the connecting base 3 and prevent the housing 1 and the connecting base 3 from loosening due to vibration, external force pulling and other factors during use, thereby ensuring the stability and reliability of the overall structure of the current transformer.

[0028] The working principle and usage process of this utility model are as follows: When using this portable current transformer, the connecting base 3 can first be threadedly connected to the bottom of the housing 1 through the bolt 5 inside the mounting hole 4 and the mounting groove 2. During transportation, the housing 1 of the current transformer body, together with the connecting base 3, is placed inside the lower housing 13. The embedded groove 15 of the protective sponge 14 tightly holds the housing 1. The upper housing 16 is locked to the lower housing 13 by a locking device. The guide block 18 at the bottom of the upper housing 16 slides along the guide groove 17 on the surface of the lower housing 13 to ensure precise alignment. The rubber pad 19 on the inner wall of the upper housing 16 further buffers and protects the housing. The locking post 20 at the bottom of the embedded groove 15 fixes the housing 1. Then, when arriving at the work site for installation, the upper housing 16 is opened by the locking device. If connector 9 is required, adjust its position along bolt 5 using the sliding groove 21 on the surface of connector 9. That is, press the positioning block 12 on the positioning port 10 located on the inner side to retract it into the positioning groove, overcome the elastic force of the ejection spring 11, and slide the limiting strip 8 out from the storage groove 6 along the limiting groove 7. Under the action of the ejection spring 11, the positioning block 12 engages with the positioning port 10 on the connecting base 3 to complete the positioning of connector 9. Then, the current transformer is connected and fixed to the external structure through the top sliding groove 21 and the connecting hole 22. The bottom reinforcement groove 23 of the housing 1 engages with the top reinforcement block 24 of the connecting base 3 to enhance the connection stability. Finally, the primary side of the current transformer is connected to the circuit under test, and the secondary side is connected to the measuring and protection device to complete the installation and enable current measurement.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable current transformer, comprising a housing (1) for protecting the main body of the current transformer, characterized in that: The bottom of the housing (1) is provided with a plurality of evenly distributed mounting slots (2). A connecting base (3) is provided at the bottom of the mounting slots (2). The bottom of the connecting base (3) is provided with a plurality of evenly distributed mounting holes (4), and the plurality of mounting holes (4) correspond one-to-one with the plurality of mounting slots (2). The bottom of the mounting holes (4) is threaded with bolts (5), and the other end of the bolts (5) is threaded to the mounting slots (2). The connecting base (3) is provided with symmetrically distributed storage slots (6) on both sides. The connecting base (3) has a limiting groove (7) inside, and a limiting strip (8) is slidably connected inside the limiting groove (7). A connector (9) is fixedly connected to the outside of the limiting strip (8). A positioning port (10) is symmetrically opened on the surface of the connecting base (3). A positioning groove is symmetrically opened at both ends of the limiting strip (8). An ejector spring (11) is fixedly connected inside the positioning groove. A positioning block (12) is slidably connected to the other end of the ejector spring (11). The positioning block (12) is slidably connected to the positioning groove and is engaged with the positioning port (10).

2. A portable current transformer according to claim 1, characterized in that: The surface of the housing (1) is fitted with a lower box (13), and a protective sponge (14) is fixedly connected inside the lower box (13). The surface of the protective sponge (14) is provided with an embedding groove (15), and the embedding groove (15) fits into the housing (1). The surface of the lower box (13) is hinged with an upper box (16), and the other end of the upper box (16) is engaged with the lower box (13) by a locking fastener.

3. A portable current transformer according to claim 2, characterised in that: The lower housing (13) has a guide groove (17) on its surface, and the bottom of the upper housing (16) is fixedly connected to a guide block (18), and the guide block (18) is engaged with the guide groove (17).

4. A portable current transformer according to claim 2, characterized in that: The inner wall of the upper box (16) is fixedly connected with a rubber pad (19), and the rubber pad (19) fits into the embedding groove (15). The bottom of the embedding groove (15) is fixedly connected with a snap-fit ​​post (20), and the snap-fit ​​post (20) snaps into the shell (1).

5. A portable current transformer according to claim 1, characterized in that: The surface of the connector (9) is symmetrically provided with sliding openings (21), and the sliding openings (21) are slidably connected with the bolts (5). The top of the surface of the connector (9) is provided with connecting holes (22).

6. A portable current transformer according to claim 1, characterized in that: The bottom of the housing (1) is provided with a reinforcing groove (23), and the top of the connecting base (3) is fixedly connected with a reinforcing block (24), and the reinforcing block (24) is engaged with the reinforcing groove (23).

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