Magnetic core plug-in type current transformer

Abstract

The utility model discloses a magnetic core plug-in type current transformer, and relates to the technical field of current transformers. The magnetic core comprises an upper shell and a lower shell, an upper magnetic core is fixedly embedded in the upper shell, an upper circuit groove is formed in the center of the bottom of the upper shell, and containing grooves are symmetrically formed in the positions, on the two sides of the upper circuit groove, of the bottom of the upper shell. The upper ends of the two connecting arms tilt around the rotating shaft by pressing the connecting support, and after the upper shell and the lower shell are aligned and attached, the rotating shaft can be driven to rotate in a reset mode under the action of the torsion spring by loosening the connecting support, so that the connecting arms can be driven to rotate in a reset mode, and the connecting columns are clamped in the arc-shaped hooking grooves; the upper shell and the lower shell can be quickly connected by the aid of the connection structure, the upper shell and the lower shell do not need to be continuously and manually pressed together when a worker carries out line signal induction testing, then the worker can carry out testing operation by free hands, and cooperative operation of the worker is not needed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of current transformer, especially relates to a magnetic core plug -in type current transformer. BACKGROUND

[0002] Current transformer is the instrument that converts primary side big current into secondary side small current to measure according to electromagnetic induction principle. In order to be convenient for hanging with the line to be measured, some open type current transformers appear on the market at present, but when needing to measure some more special current signals, such as power frequency magnetic field current, the traditional open type current transformer is difficult to achieve the expected measurement effect, and the reason is that: due to structural reasons, the magnetic core in the open type current transformer is generally two-section type, when the upper and lower shells are opened, the two-section magnetic core is separated, when the upper and lower shells are closed, the two-section magnetic core is butted (or plugged) and forms a closed loop. Through the retrieval, the patent with the application number 202221021000.6 discloses a kind of magnetic core plug -in type current transformer, belongs to the technical field of current transformer equipment. Including upper shell (3) and lower shell (4), upper magnetic core (8) and lower magnetic core (12) are respectively arranged in upper shell (3) and lower shell (4), upper magnetic core (8) and lower magnetic core (12) are plugged into magnetic core closed loop, inductive coil (11) is sleeved on the two sides of magnetic core closed loop, characterized in that: the upper magnetic core (8) is provided with the opening downwards opening, the lower magnetic core (12) is provided with the opening downwards opening, the length of the two ends of the upper magnetic core (8) lower opening and the length of the two ends of the upper opening of the lower magnetic core (12) are same, the plug -in place of the upper magnetic core (8) and the lower magnetic core (12) is located in the middle of inductive coil (11).

[0003] But in the process of actual use, the applicant finds that, after the upper shell and the lower shell are docked, due to the lack of connecting structure, in order to prevent the connection between the upper magnetic core and the lower magnetic core from loosening, personnel need to manually continuously force the upper shell and the lower shell to be pressed together, so that personnel cannot free up hands to carry out line signal induction test, thus other personnel need to assist in operation, in view of this, we propose a kind of magnetic core plug -in type current transformer. Utility model content

[0004] To solve the above technical problems, the utility model is realized by the following technical schemes:

[0005] The utility model relates to a kind of magnetic core plug-in current transformers, including upper shell and lower shell, the inside of upper shell is embedded with upper magnetic core, the central position of the bottom of upper shell is equipped with upper line recess, the bottom of the upper shell of the both sides of upper line recess is equipped with accommodating groove symmetrically, the both ends of upper magnetic core are respectively inserted from two accommodating grooves, the inside of lower shell is embedded with lower magnetic core, the central position of the top of lower shell is equipped with lower line recess, inductive coil is fixedly connected in the lower shell symmetrically in the both sides of lower line recess, two inductive coils are respectively set in the two insertion ends of lower magnetic core, the insertion end of upper magnetic core is connected with the insertion end of lower magnetic core, the both sides of the lower end of upper shell are fixedly provided with connecting column symmetrically, the both sides of the upper portion of lower shell are rotatably connected in pivot by bearing symmetrically, one end in the inside of pivot is elastically connected with the lower shell by torsion spring, one end of pivot in the outside of lower shell is fixedly sleeved with connecting arm, arc-shaped hanging groove is formed in the upper end of connecting arm, and arc-shaped hanging groove is connected with connecting column, the lower end of two connecting arms is connected by connecting support.

[0006] Preferably, the bottom of the upper shell is symmetrically provided with a positioning hole on both sides, and the positioning hole is located outside the accommodating groove.

[0007] Preferably, the top of the lower shell is fixedly provided with a positioning column symmetrically, and the positioning column is connected with the positioning hole.

[0008] Preferably, the same side of the upper shell and the lower shell is fixedly connected with a connecting seat, and the two connecting seats are connected by a connecting rope.

[0009] Preferably, the bottom of the lower shell is fixedly provided with a terminal block, and the terminal end of the inductive coil is electrically connected with the terminal block.

[0010] Preferably, the front end of the inductive coil is connected with the accommodating groove.

[0011] The utility model has the following beneficial effects:

[0012] The utility model discloses a kind of magnetic core plug-in current transformers, by pressing connecting bracket makes the upper end of two connecting arms around pivot, and after upper shell and lower shell align and adhere, release connecting bracket, it can be under the action of torsion spring, pivot reset rotation is driven, to be able to drive connecting arm reset rotation, make connecting post be clamped in arc-shaped hanging groove, it can be realized to the quick connection of upper shell and lower shell, personnel is not needed in line signal response test, continuously manually press upper shell and lower shell together, to be able to make personnel free hand to carry out test operation, personnel is not needed to cooperate operation, by the cooperation of positioning column and positioning hole, personnel can be facilitated to the quick butt joint of upper shell and lower shell, by the connection seat and connecting rope of being set, after upper shell and lower shell are separated, easily lost can be prevented, use effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced to the drawings needed to be used for the embodiment description, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.

[0014] Fig. 1 It is left view structural schematic diagram of the utility model magnetic core plug-in current transformer.

[0015] Fig. 2 It is right view structural schematic diagram of the utility model magnetic core plug-in current transformer.

[0016] Fig. 3 It is the internal structure schematic diagram of the utility model magnetic core plug-in current transformer upper shell and lower shell.

[0017] In the drawings, the component list represented by each mark is as follows:

[0018] 1, upper shell;11, accommodating groove;12, positioning hole;13, upper line groove;14, connecting post;2, upper magnetic core;3, lower shell;31, positioning column;32, lower line groove;33, terminal seat;4, induction coil;5, pivot;6, connecting arm;61, arc-shaped hanging groove;7, connecting bracket;8, lower magnetic core;9, connection seat;10, connecting rope. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0020] Please refer to Figs. 1-3 The present application provides a technical solution:

[0021] The utility model provides a kind of magnetic core plug-in current transformer, including upper shell 1 and lower shell 3, the inside of upper shell 1 is embedded and fixed with upper magnetic core 2, the central position of the bottom of upper shell 1 is equipped with upper line recess 13, the bottom of the both sides of upper line recess 13 in upper shell 1 is equipped with accommodating groove 11 symmetrically, the both ends of upper magnetic core 2 plug-in end are respectively from two accommodating grooves 11 stretch out, the inside of lower shell 3 is embedded and fixed with lower magnetic core 8, the central position of the top of lower shell 3 is equipped with lower line recess 32, the both sides of lower line recess 32 in lower shell 3 are fixedly connected with inductive coil 4 symmetrically, the front end of inductive coil 4 is connected with accommodating groove 11, two inductive coils 4 are respectively set in the both plug-in ends of lower magnetic core 8, the plug-in end of upper magnetic core 2 is connected with the plug-in end of lower magnetic core 8, by being plugged into closed loop with upper magnetic core 2 and lower magnetic core 8, signal interference can be avoided, and the plug-in end of upper magnetic core 2 and lower magnetic core 8 can be located in the middle of inductive coil 4, especially suitable for the measurement of power frequency magnetic field current, the both sides of the lower end of upper shell 1 are fixedly provided with connecting column 14 symmetrically, the both sides of the upper portion of lower shell 3 are rotatably connected in bearing symmetry in pivot 5, and one end of pivot 5 located in the inside of lower shell 3 is elastically connected with lower shell 3 by torsion spring, the torsion spring is prior art on the market, not shown in the figure, the other end of pivot 5 located in the outside of lower shell 3 is fixedly provided with connecting arm 6, the upper end of connecting arm 6 is equipped with arc-shaped hanging groove 61, and arc-shaped hanging groove 61 is connected with connecting column 14, the lower end of two connecting arms 6 is connected by connecting support 7, by pressing connecting support 7, the upper end of two connecting arms 6 is raised around pivot 5, and after upper shell 1 and lower shell 3 are aligned and fit, connecting support 7 is loosened, under the action of torsion spring, pivot 5 can be reset and rotated, so that connecting arm 6 can be reset and rotated, so that connecting column 14 can be clamped in arc-shaped hanging groove 61, that is, the quick connection of upper shell 1 and lower shell 3 can be realized, without the need for personnel to continuously manually press upper shell 1 and lower shell 3 together when testing line signal, so that personnel can free their hands to operate, without the need for personnel to cooperate, the bottom of lower shell 3 is fixedly provided with terminal block 33, and the terminal end of inductive coil 4 bottom is electrically connected with terminal block 33, when using, separate upper shell 1 and lower shell 3, when separating, one hand holds lower shell 3 while pressing connecting support 7 with thumb, connecting arm 6 is rotated around pivot 5 by connecting support 7, so that the front end of connecting arm 6 is raised, in this process, the rotation of pivot 5 can compress torsion spring, then the line to be tested is passed through lower line recess 32, then upper shell 1 and lower shell 3 are connected together, inductive coil 4 is inserted into accommodating groove 11, and upper magnetic core 2 and lower magnetic core 8 are plugged into closed loop, then connecting support 7 is loosened, under the action of elastic force of torsion spring, pivot 5 and connecting arm 6 can be reset and rotated, so that connecting column 14 can be clamped in arc-shaped hanging groove 61, that is, the quick connection of upper shell 1 and lower shell 3 can be realized, without the need for personnel to continuously manually press upper shell 1 and lower shell 3,Further, personnel can free their hands to perform test operation, at this time, the induction coil 4 is sleeved on the outer ring of the magnetic core, and the signal in the to-be-tested circuit can be inducted.

[0022] The upper shell 1 is provided with a positioning hole 12 on both sides of the bottom, and the positioning hole 12 is located outside the accommodating groove 11. The lower shell 3 is provided with a positioning column 31 on the top, and the positioning column 31 is connected with the positioning hole 12. The positioning column 31 and the positioning hole 12 can facilitate the quick docking of the upper shell 1 and the lower shell 3. The same side of the upper shell 1 and the lower shell 3 is provided with a connecting seat 9, and the two connecting seats 9 are connected by a connecting rope 10. The connecting seat 9 and the connecting rope 10 can prevent the upper shell 1 and the lower shell 3 from being lost easily after being separated. During the docking of the upper shell 1 and the lower shell 3, the positioning column 31 can be aligned and inserted into the positioning hole 12 to position the docking of the upper shell 1 and the lower shell 3.

[0023] Working principle: when in use, the upper shell 1 and the lower shell 3 are separated. When separating, one hand holds the lower shell 3, and the other hand presses the connecting bracket 7 with the thumb. The connecting bracket 7 drives the connecting arm 6 to rotate around the rotating shaft 5, so that the front end of the connecting arm 6 is lifted. In this process, the rotating shaft 5 rotates to compress the torsional spring. Then, the to-be-tested circuit is passed through the lower circuit groove 32. Then, the upper shell 1 and the lower shell 3 are docked together, so that the induction coil 4 is inserted into the accommodating groove 11, and the upper magnetic core 2 and the lower magnetic core 8 are inserted into a closed loop. During the docking of the upper shell 1 and the lower shell 3, the positioning column 31 can be aligned and inserted into the positioning hole 12 to position the docking of the upper shell 1 and the lower shell 3. Then, the connecting bracket 7 is loosened. Under the action of the elastic force of the torsional spring, the rotating shaft 5 and the connecting arm 6 can be reset and rotated, so that the connecting column 14 is clamped in the arc-shaped hanging groove 61. The upper shell 1 and the lower shell 3 can be quickly connected without manually pressing the upper shell 1 and the lower shell 3 continuously. Further, personnel can free their hands to perform test operation, at this time, the induction coil 4 is sleeved on the outer ring of the magnetic core, and the signal in the to-be-tested circuit can be inducted.

[0024] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0025] The above are only preferred embodiments of the present application, and do not limit the present application, any modification to the technical solutions recorded in the foregoing embodiments, and equivalent replacement of part of the technical features, all belong to the protection scope of the present application.

Claims

1. A magnetic core plug-in current transformer, comprising an upper housing (1) and a lower housing (3), characterized in that: An upper magnetic core (2) is embedded and fixed inside the upper housing (1). An upper circuit groove (13) is provided at the center of the bottom of the upper housing (1). Accommodation slots (11) are symmetrically provided on the bottom of the upper housing (1) on both sides of the upper circuit groove (13). The two plug-in ends of the upper magnetic core (2) extend from the two accommodation slots (11) respectively. A lower magnetic core (8) is embedded and fixed inside the lower housing (3). A lower circuit groove (32) is provided at the center of the top of the lower housing (3). Induction coils (4) are symmetrically fixed and connected in the lower housing (3) on both sides of the lower circuit groove (32). The two induction coils (4) are respectively sleeved on the two plug-in ends of the lower magnetic core (8). The upper magnetic core (2) is connected to the lower magnetic core (8) by a fitting. Connecting posts (14) are symmetrically fixed on both sides of the lower end of the upper housing (1). The upper two sides of the lower housing (3) are symmetrically connected to the rotating shaft (5) by bearings. One end of the rotating shaft (5) inside the lower housing (3) is elastically connected to the lower housing (3) by a torsion spring. One end of the rotating shaft (5) outside the lower housing (3) is fitted with a connecting arm (6). The upper end of the connecting arm (6) is provided with an arc-shaped hanging groove (61), and the arc-shaped hanging groove (61) is connected to the connecting post (14). The lower ends of the two connecting arms (6) are connected by a connecting bracket (7).

2. A magnetic core plug-in current transformer according to claim 1, characterized in that, The upper housing (1) has symmetrical positioning holes (12) on both sides of its bottom, and the positioning holes (12) are located outside the receiving groove (11).

3. A magnetic core plug-in current transformer according to claim 2, characterized in that, The top of the lower housing (3) is symmetrically fixed with positioning posts (31), and the positioning posts (31) are connected to the positioning holes (12).

4. A magnetic core plug-in current transformer according to claim 1, characterized in that, The upper shell (1) and the lower shell (3) are both fixedly connected to a connecting seat (9) on the same side, and the two connecting seats (9) are connected by a connecting rope (10).

5. A magnetic core plug-in current transformer according to claim 1, characterized in that, A terminal block (33) is fixedly provided at the bottom of the lower housing (3), and the terminal at the bottom of the induction coil (4) is electrically connected to the terminal block (33).

6. A magnetic core plug-in current transformer according to claim 1, characterized in that, The front end of the induction coil (4) is connected to the receiving groove (11).

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