A plug-and-play current transformer

Abstract

The present invention relates to a plug-and-play current transformer, comprising a current transformer body and a terminal arranged on the current transformer body. The terminal and the side end surface of an external cable are both provided with magnets for mutually adsorbing and realizing transverse locking and having an arc-shaped cross section. A locking device is provided on the terminal at a position relative to the magnet to facilitate circumferential locking of the terminal and the cable. The initial connection between the terminal and the cable is realized by the magnets arranged on the terminal and the cable, and the circumferential and axial locking is realized by the locking device, thereby improving the firmness of the connection between the terminal and the cable, avoiding the phenomenon that a tool is required to loosen the terminal due to locking with a nut in a traditional method, and improving the convenience of use.

Description

Technical Field

[0001] The invention relates to the technical field of mutual inductors, in particular to a plug-and-play current mutual inductor. Background Art

[0002] The instrument transformer can convert high voltage into low voltage and high current into low current for measuring or protecting the system. Its main function is to convert high voltage or high current into standard low voltage or standard low current in proportion, so as to realize the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. At the same time, the instrument transformer can also be used to separate high voltage systems to ensure the safety of people and equipment. The ends of the existing instrument transformers are all tightened with nuts for connection with cables. Special tools are required for disassembly, which is complicated and affects the overall power construction process. At the same time, the nuts are easily loosened during transportation, and the connection is unstable. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a plug-and-play current transformer.

[0004] A plug-and-play current transformer comprises a current transformer body and a terminal arranged on the current transformer body. The terminal and the side end surface of the external cable are both provided with magnets for mutual adsorption to achieve lateral locking and with a circular arc cross section. A locking device is provided on the terminal at a position relative to the magnet to facilitate circumferential locking of the terminal and the cable.

[0005] The locking device comprises a groove arranged on the cable, a sliding groove arranged on the wiring terminal, and a wedge block matched with the groove. The inner wall of the sliding groove is provided with a spring matched with the wedge block.

[0006] The wedge block is provided with a plurality of locking structures for locking the wedge block and the cable in the axial direction, and the side wall of the cable is provided with a plurality of notches cooperating with the locking structures.

[0007] An arc surface is arranged on the end surface of the wedge block relative to the spring, which facilitates the cable to be pressed against and slowly pushed into the sliding groove.

[0008] The beneficial effects of the present invention are: the initial connection between the terminal and the cable is achieved by means of magnets built into the terminal and the cable, and then circumferential and axial locking is achieved by means of a locker, thereby improving the firmness of the connection between the terminal and the cable, avoiding the phenomenon in which a tool is required to loosen the connection by locking with a nut in the traditional method, and improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0010] Figure 1It is a structural schematic diagram of the connection terminal of the present invention when it cooperates with an external cable;

[0011] Figure 2 For the present invention Figure 1 Schematic diagram of AA structure;

[0012] Figure 3 For the present invention Figure 1 Schematic diagram of BB structure;

[0013] Figure 4 For the present invention Figure 1 Schematic diagram of the local enlarged structure of I;

[0014] Figure 5 For the present invention Figure 3 Schematic diagram of CC structure;

[0015] Figure 6 It is a schematic diagram of the overall main structure of the present invention;

[0016] Figure 7 It is a schematic diagram of the matching structure of the groove and the wedge block of the present invention. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0018] like Figures 1 to 7 As shown, a plug-and-play current transformer includes a current transformer body 8 and a terminal 1 arranged on the current transformer body 8. The terminal 1 and the side end surface of the external cable 2 are provided with magnets 3 with a circular arc cross section for mutual adsorption to achieve lateral locking. A locking device is provided on the terminal 1 at a position relative to the magnet 3 to facilitate circumferential locking of the terminal 1 and the cable 2.

[0019] The connection terminal 1 and the cable 2 are connected by the magnet 3 and the locker to realize plug-and-play of the connection terminal 1, which is convenient and quick and can be used without the assistance of tools.

[0020] The cross section of the magnet 3 is in an arc shape so that the magnets 3 can better fit each other and increase the contact area.

[0021] The locking device comprises a groove 7 arranged on the cable 2, a sliding groove 6 arranged on the terminal 1, and a wedge block 4 matched with the groove 7. A spring 5 matched with the wedge block 4 is arranged on the inner wall of the sliding groove 6.

[0022] The groove 7 cooperates with the wedge block 4 to achieve positioning in the circumferential direction.

[0023] When the cable 2 pushes the wedge block 4 , the wedge block 4 slides in the sliding groove 6 , and finally generates a reaction force through the spring 5 to resist the cable 2 .

[0024] The wedge block 4 is provided with a plurality of locking structures 4a for locking the wedge block 4 and the cable 2 in the axial direction, and the side wall of the cable 2 is provided with a plurality of notches 4b for matching with the locking structures 4a.

[0025] The locking structure 4a is laterally distributed on the outer end of the wedge block 4, the groove 7 on the cable 2 realizes the circumferential direction limitation of the wedge block 4, and the locking structure 4a realizes the longitudinal limitation.

[0026] The initial connection between the terminal 1 and the cable 2 is achieved by means of the magnet 3 built into the terminal 1 and the cable 2, and then the reaction force of the spring 5 is exerted on the wedge block 4 to lock the wedge block 4 and at the same time further lock them with the locking structure 4a arranged on the wedge block 4. When the terminal 1 shakes, it will not peel off, thereby improving the firmness of the connection between the terminal 1 and the cable 2, avoiding the phenomenon that the traditional method of locking with a nut requires a tool to loosen it, and improving the convenience of use.

[0027] An arcuate surface 4c is arranged on the end surface of the wedge block 4 opposite to the spring 5 so that the cable 2 can be pressed against and slowly pushed into the sliding groove 6.

[0028] The arc surface facilitates the cable 2 to push the wedge block 4.

[0029] The sizes of the two sets of magnets 3 are not limited.

[0030] The method of using the present invention is as follows: when in use, the cable 2 is inserted into the terminal 1, the groove 7 is aligned with the locking structure 4a, the locking structure 4a is pushed into the sliding groove 6 by external force, and the spring 5 is locked by force, and the two arc-shaped magnets 3 are docked to achieve the fastening of the cable 2 and the terminal 1.

[0031] When the cable 2 needs to be removed, the cable 2 only needs to be rotated forcefully. During the rotation, the groove 7 is first disengaged from the wedge block 4 to release the locking in the circumferential direction. Then, during the continued rotation, the magnet 3 on the terminal 1 and the magnet 3 on the cable 2 will gradually move away from each other until the magnetic force is reduced to the point where a person can pull the cable 2 out of the terminal 1 along the axial direction.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A plug-and-play current transformer, comprising a current transformer body (8), and a connection terminal (1) arranged on the current transformer body (8), characterized in that: The side end surfaces of the wiring terminal (1) and the external cable (2) are both provided with magnets (3) with a circular arc cross section for mutual adsorption to achieve lateral locking. A locking device is provided on the wiring terminal (1) at a position relative to the magnet (3) to facilitate circumferential locking of the wiring terminal (1) and the cable (2). The locking device comprises a groove (7) provided on the cable (2), a sliding groove (6) provided on the wiring terminal (1), and a wedge block (4) cooperating with the groove (7). A spring (5) cooperating with the wedge block (4) is arranged on the inner wall of the sliding groove (6); the wedge block (4) is provided with a plurality of locking structures (4a) for locking the wedge block (4) and the cable (2) in the axial direction; the side wall of the cable (2) is provided with a plurality of notches (4b) cooperating with the locking structures (4a); and an arcuate surface (4c) is arranged on the end surface of the wedge block (4) relative to the spring (5) so that the cable (2) can be pressed against and then slowly pushed into the sliding groove (6).

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