Miniature current transformer

Abstract

The utility model relates to the technical field of miniature current transformers, in particular to a miniature current transformer which comprises a miniature current transformer body, a shell plate is fixedly arranged on the front side of the miniature current transformer body, a clamping frame plate is installed on the rear side of the shell plate, and a magnetic core is installed in the miniature current transformer body. Limiting concave plates used for fixing the magnetic core are connected to the periphery of the interior of the miniature current transformer body in a sliding mode, and the magnetic core can be further limited and fixed through the four elastic limiting concave plates and the four elastic positioning stop levers, so that the magnetic core is firmer and more stable; and along with the installation of the shell plate, the two telescopic pressing plates provided with the first connecting springs are driven to be attached and positioned to one side of the magnetic core, so that the position of the magnetic core is positioned again, the magnetic core is not prone to loosening, the stability of the magnetic core in the miniature current transformer is ensured, and the safety of the miniature current transformer during use is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro current transformer technical field, concretely is a kind of micro current transformer. BACKGROUND

[0002] Micro current transformer is a kind of current signal amplification and conversion device, usually by core, coil and shell etc. It is mainly used to realize current measurement in power system monitoring, convert high current signal into low current signal, to facilitate monitoring and analysis, while it can provide reliable technical support for smart grid system.

[0003] Prior art discloses patent application number "CN201620562850.5", a micro current transformer, including shell, the transformer body placed in shell, the cover plate for fixing the transformer body in shell and the two metal connecting pieces connected with primary circuit extending cover plate;Cover plate and shell have buckle structure;The transformer body includes annular magnetic core, primary coil and secondary coil wound on the magnetic core;It is simple and convenient to install, greatly reduces material cost, improves production efficiency.

[0004] The micro current transformer can only realize simple and convenient installation, and the magnetic core in the micro current transformer is relatively simple to fix in actual use, so that the magnetic core is prone to looseness, so that the magnetic core cannot be safely and stably fixed, the micro current transformer is more dangerous to use, thereby affecting the stability of the micro current transformer, and is inconvenient to use. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of micro current transformer, to solve the problems presented in the above background.

[0006] The utility model can be realized by the following technical scheme:

[0007] A kind of micro current transformer, including micro current transformer main body, the front side of micro current transformer main body is fixed with shell plate, the rear side of shell plate is installed with card frame board, the inside of micro current transformer main body is installed with magnetic core, the periphery in the inside of micro current transformer main body is slidably connected with the limiting recess plate for fixing magnetic core;

[0008] Limiting recess plate and micro current transformer main body are connected with No. Two connecting springs, the bottom end of micro current transformer main body is fixedly installed with four positioning stop bars for fixing magnetic core, the lower side of shell plate is fixedly installed with two fixed blocks, the lower side of two fixed blocks is slidably connected with telescopic pressing plate for fixing magnetic core, one connecting spring is fixedly connected between two telescopic pressing plates and fixed block.

[0009] Preferably, the lower side of the micro current transformer body is provided with two insertion pins, the lower side of the micro current transformer body is fixedly connected with two symmetrical circular seats, the insertion pins are located in the circular seats, the inner sides of the two circular seats are both rotatably connected with two protective rotary plates for protecting the insertion pins, and the lower side of the micro current transformer body is rotatably connected with four limiting baffle plates.

[0010] Preferably, one side of each of the two protective rotary plates is provided with a mounting block, one side of each of the two mounting blocks is slidably connected with a movable block, two third connecting springs are connected between the two movable blocks and the mounting blocks, and one side of each of the two movable blocks penetrates through the protective rotary plate and extends into the protective rotary plate.

[0011] Preferably, the four sides of the clamping frame plate are fixedly connected with rubber strips, the inner side of the micro current transformer body is provided with a mounting groove, the mounting groove is matched with the rubber strips, and one side of the rubber strip is clamped with the inner side of the micro current transformer body through the mounting groove.

[0012] Preferably, the two ends of the micro current transformer body and the shell plate are both clamped with a U-shaped plug plate for fixing the shell plate, and the front side of the shell plate is provided with a groove.

[0013] Preferably, the front side of the micro current transformer body is provided with a matched clamping groove, the matched clamping groove is matched with the clamping frame plate, and the rear side of the clamping frame plate is clamped with the front side of the micro current transformer body through the matched clamping groove.

[0014] Preferably, the micro current transformer body is made of a CDM3L-125 plastic shell, the two insertion pins are both high-temperature terminal wires, one side of the inside of the CDM3L-125 plastic shell is filled with potting glue, the other side of the inside of the CDM3L-125 plastic shell is respectively provided with a CDM3L-125 shielding ring and a CDM3L-125 shielding sheet, and a CDM3L-125 insulation semi-finished product is fixedly installed between the CDM3L-125 shielding ring and the CDM3L-125 shielding sheet.

[0015] The micro current transformer has the advantages that:

[0016] 1、The four limiting concave plates and the four positioning baffle rods with elasticity can further limit and fix the magnetic core, so that the magnetic core is more stable, the two telescopic pressing plates provided with the connecting springs are driven to be attached to one side of the magnetic core along with the installation of the shell plate, the position of the magnetic core is positioned again, the magnetic core is not easy to loosen, the stability of the magnetic core in the micro current transformer is ensured, and the safety of the micro current transformer in use is improved.

[0017] 2, the utility model discloses a four protection rotary board is fixed to two contact pin place to the steady protection contact pin, avoid the emergence contact pin accident and direct damage, prolong the service life of micro current transformer, then utilize the rubber strip of frame board place can increase the sealing property when shell plate installation, make the sealing performance of micro current transformer better. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will be to the drawing needed to use in the embodiment or prior art description simple introduction, obviously, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, still can obtain other drawing according to these drawings;

[0019] Figure 1 It is the whole structure schematic diagram of the utility model;

[0020] Figure 2 It is the structure schematic diagram of the utility model Figure 1 In fixed block, telescopic pressboard and no. 1 connecting spring;

[0021] Figure 3 It is the installation schematic diagram of the utility model Figure 2 In positioning stop lever and limiting recessed plate;

[0022] Figure 4 It is the structure schematic diagram of the utility model Figure 1 In CDM3L-125 plastic shell;

[0023] Figure 5 It is the installation schematic diagram of the utility model Figure 1 In contact pin and round seat;

[0024] Figure 6 It is the enlarged view of the utility model Figure 5 In A place;

[0025] The reference signs in the drawing are as follows:

[0026] 1, micro current transformer main body;2, shell plate;3, frame plate;4, U-shaped plugboard;5, fixed block;6, telescopic pressboard;7, no. 1 connecting spring;8, magnetic core;9, positioning stop lever;10, limiting recessed plate;11, no. 2 connecting spring;12, recess;13, contact pin;14, round seat;15, protection rotary board;16, mounting block;17, movable block;18, no. 3 connecting spring;88, installation groove;89, rubber strip;99, adaptive clamping groove;66, limiting baffle;100, CDM3L-125 insulation semi-finished product;200, high-temperature terminal wire;300, CDM3L-125 plastic shell;400, potting adhesive;500, CDM3L-125 shielding ring;600, CDM3L-125 shielding sheet. Detailed Implementation

[0027] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1 to 6 As shown, a miniature current transformer includes a miniature current transformer body 1, a shell plate 2 fixedly provided on the front side of the miniature current transformer body 1, a frame plate 3 installed on the rear side of the shell plate 2, a magnetic core 8 installed inside the miniature current transformer body 1, and limiting recesses 10 for fixing the magnetic core 8 slidably connected around the inside of the miniature current transformer body 1.

[0029] A second connecting spring 11 is connected between the limiting concave plate 10 and the miniature current transformer body 1. Four positioning stops 9 for fixing the magnetic core 8 are fixedly installed at the bottom inside the miniature current transformer body 1. Two fixing blocks 5 are fixedly installed on the lower side of the shell plate 2. Telescopic pressure plates 6 for fixing the magnetic core 8 are slidably connected to the lower side of the two fixing blocks 5. A first connecting spring 7 is fixedly connected between the two telescopic pressure plates 6 and the fixing blocks 5. By setting the telescopic pressure plates 6, the position of the magnetic core 8 can be fixed, so that the magnetic core 8 is not easy to loosen and displace.

[0030] Two pins 13 are installed on the lower side of the miniature current transformer body 1. Two symmetrically arranged circular seats 14 are fixedly connected to the lower side of the miniature current transformer body 1. The circular seats 14 can protect the pins 13, making the pins 13 safer. The pins 13 are located inside the circular seats 14. Two protective rotating plates 15 are rotatably connected to the inner surfaces of the two circular seats 14 to protect the pins 13. The protective rotating plates 15 can prevent the pins 13 from breaking due to external factors, thus better protecting the pins 13. Four limiting baffles 66 are rotatably connected to the lower side of the miniature current transformer body 1. The limiting baffles 66 are used to limit the protective rotating plates 15, allowing the protective rotating plates 15 to be stored for easy use of the pins 13 of the miniature current transformer.

[0031] The two protective rotary plates 15 are provided with mounting blocks 16 on one side, the two mounting blocks 16 are slidably connected with movable blocks 17 on one side, the two movable blocks 17 and the mounting blocks 16 are connected with two third connecting springs 18, one side of the movable block 17 penetrates through the protective rotary plate 15 and extends to the inside of the protective rotary plate 15, through the arrangement of the movable block 17, as long as the movable block 17 provided with the third connecting spring 18 is pressed, the movable block 17 can be away from the protective rotary plate 15, so as to release the fixing of the two protective rotary plates 15, and the protective rotary plate 15 can be rotated and stored.

[0032] The rubber strip 89 is fixedly connected around the clamping frame plate 3, the mounting groove 88 is formed in the inner side of the micro current transformer body 1, the mounting groove 88 is matched with the rubber strip 89, and the rubber strip 89 is clamped with the inner side of the micro current transformer body 1 through the mounting groove 88.

[0033] The U-shaped plug plate 4 for fixing the shell plate 2 is clamped at two ends of the micro current transformer body 1 and the shell plate 2, and the recess 12 is formed in the front side of the shell plate 2.

[0034] The adaptive clamping groove 99 is formed in the front side of the micro current transformer body 1, the adaptive clamping groove 99 is matched with the clamping frame plate 3, and the rear side of the clamping frame plate 3 is clamped with the front side of the micro current transformer body 1 through the adaptive clamping groove 99.

[0035] The micro current transformer body 1 is made of a CDM3L-125 plastic shell 300, the two plug pins 13 are two high-temperature terminal wires 200, the inside of the CDM3L-125 plastic shell 300 is filled with potting glue 400 on one side, the CDM3L-125 plastic shell 300 is internally provided with a CDM3L-125 shielding ring 500 and a CDM3L-125 shielding sheet 600 on the other side, the CDM3L-125 shielding ring 500 and the CDM3L-125 shielding sheet 600 are fixedly installed with a CDM3L-125 insulation semi-finished product 100, the CDM3L-125 plastic shell 300 is smooth on the surface, without defects such as material defects, burrs, flash, and the like, and the lead wire is not loose, wherein four shielding sheets are contained, a primary winding is connected with a red lead wire, and a secondary winding is connected with a black lead wire.

[0036] The working principle of the micro current transformer provided by the utility model is as follows:

[0037] By installing the magnetic core 8 to the inside of the miniature current transformer, the magnetic core 8 will press the four limiting recessed plates 10 provided with the No. 2 connecting spring 11, so that the four limiting recessed plates 10 with elasticity can be clamped and positioned to the magnetic core 8, and the four positioning stop levers 9 can further limit and fix the magnetic core 8, so that the magnetic core 8 is more firm and stable, then the clamping frame plate 3 at the shell plate 2 is clamped to the front of the miniature current transformer body 1, so that the two telescopic pressing plates 6 provided with the No. 1 connecting spring 7 can be clamped and positioned to one side of the magnetic core 8, so as to position the position of the magnetic core 8 again, so that the magnetic core 8 is not easy to loosen, and the stability of the magnetic core 8 in the miniature current transformer is ensured, and the safety of the miniature current transformer during use is improved.

[0038] By rotating the four limiting stop plates 66 in sequence, the limiting of the four protection rotary plates 15 can be released, so that the four protection rotary plates 15 can be rotated at the pin 13, then the two movable blocks 17 provided with the No. 3 connecting spring 18 are clamped into the two protection rotary plates 15, so that the four protection rotary plates 15 can stably protect the pin 13, so as to avoid the direct damage of the pin 13 due to accident, prolong the service life of the miniature current transformer, then the two U-shaped plug-in plates 4 can be used to reinforce the installation of the miniature current transformer body 1 and the shell plate 2, so that the shell plate 2 is more stably installed, and the rubber strip 89 at the clamping frame plate 3 can increase the sealing performance during installation of the shell plate 2, so that the sealing performance of the miniature current transformer is better.

[0039] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A micro current transformer comprising a micro current transformer body (1), characterized in that: The front side of the micro current transformer body (1) is fixedly provided with a shell plate (2), the rear side of the shell plate (2) is provided with a clamping frame plate (3), the inside of the micro current transformer body (1) is provided with a magnetic core (8), and the periphery of the inside of the micro current transformer body (1) is slidably connected with a limiting concave plate (10) for fixing the magnetic core (8). The limiting concave plate (10) and the micro current transformer body (1) are connected with a No. 2 connecting spring (11), the bottom end of the inside of the micro current transformer body (1) is fixedly provided with four positioning stop rods (9) for fixing the magnetic core (8), the lower side of the shell plate (2) is fixedly provided with two fixed blocks (5), the lower side of each of the two fixed blocks (5) is slidably connected with a telescopic pressing plate (6) for fixing the magnetic core (8), and the telescopic pressing plate (6) and the fixed block (5) are fixedly connected with a No. 1 connecting spring (7).

2. A micro current transformer according to claim 1, characterized in that The lower side of the micro current transformer body (1) is provided with two insertion pins (13), the lower side of the micro current transformer body (1) is fixedly connected with two circular seats (14) arranged symmetrically, the insertion pin (13) is located in the inside of the circular seat (14), the inner side of each of the two circular seats (14) is rotatably connected with two protective rotary plates (15) for protecting the insertion pin (13), and the lower side of the micro current transformer body (1) is rotatably connected with four limiting stop plates (66).

3. A micro current transformer according to claim 2, characterised in that, One side of each of the two protective rotary plates (15) is provided with a mounting block (16), one side of each of the two mounting blocks (16) is slidably connected with a movable block (17), the movable block (17) and the mounting block (16) are connected with two No. 3 connecting springs (18), and one side of the movable block (17) penetrates through the protective rotary plate (15) and extends into the inside of the protective rotary plate (15).

4. A micro current transformer according to claim 1, characterized in that The periphery of the clamping frame plate (3) is fixedly connected with a rubber strip (89), the inner side of the micro current transformer body (1) is provided with a mounting groove (88), the mounting groove (88) is matched with the rubber strip (89), and one side of the rubber strip (89) is clamped with the inner side of the micro current transformer body (1) through the mounting groove (88).

5. A micro current transformer according to claim 1, characterized in that The two ends of the micro current transformer body (1) and the shell plate (2) are clamped with a U-shaped plug-in plate (4) for fixing the shell plate (2), and the front side of the shell plate (2) is provided with a groove (12).

6. A micro current transformer according to claim 1, characterized in that The front side of the micro current transformer body (1) is provided with a matched clamping groove (99), the matched clamping groove (99) is matched with the clamping frame plate (3), and the rear side of the clamping frame plate (3) is clamped with the front side of the micro current transformer body (1) through the matched clamping groove (99).

7. A micro current transformer according to claim 2, characterized in that Said micro current transformer body (1) is made of CDM3L-125 plastic shell (300), two said pins (13) are two high temperature terminal wires (200) respectively, one side of the inside of the CDM3L-125 plastic shell (300) is filled with potting glue (400), the other side of the inside of the CDM3L-125 plastic shell (300) is respectively provided with CDM3L-125 shielding ring (500) and CDM3L-125 shielding sheet (600), and the CDM3L-125 shielding ring (500) and the CDM3L-125 shielding sheet (600) are fixedly provided with CDM3L-125 insulation semi-finished product (100).

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