Portable Rogowski coil metering tool

Abstract

The utility model belongs to the technical field of metering tools, and discloses a portable Rogowski coil metering tool, which comprises a wire winding plate combination part, a plurality of wire winding plates with different diameters are distributed along the axis direction, and a gap is reserved between every two adjacent wire winding plates; the wire winding plates are provided with accommodating cavities which are coaxially arranged; the winding plate is used for winding and fixing a Rogowski coil; the connecting part is arranged between the two adjacent winding plates and is used for connecting the two adjacent winding plates; the supporting part is arranged at the bottom of the winding plate located on the bottommost layer and plays a role in supporting the whole tool; the current conducting rod sequentially penetrates through the containing cavities of the winding plates from top to bottom and then is fixed. The Rogowski coil metering device is compact in structure and convenient to carry, and can accurately meter the Rogowski coil in various environments.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of measurement froge, specifically a portable roth coil measurement froge. BACKGROUND

[0002] In the process of roth coil measurement, correct installation method is needed to ensure the accuracy of the measurement process and accurate measurement is necessary. For example, when installing a roth coil in a power system to measure bus current, a safe distance and a specified installation method are required for operation. The installation process must ensure that the axis of the roth coil coincides with the axis of the current-carrying conductor to obtain accurate mutual inductance. If installed improperly, measurement errors will be introduced. The emergence of roth coil measurement froge provides a highly accurate solution for current measurement. At present, the integration and miniaturization trend of roth coil measurement froge is obvious, and it is mainly applied in power systems, industrial automation, new energy, scientific research and experimental fields. There are currently several problems with roth coils:

[0003] 1. In the measurement of large-diameter roth coils, the installation process is complicated, such as the assembly, transportation and disassembly of roth coil froge during non-fixed site measurement, which is very complicated and not convenient.

[0004] 2. In the measurement of roth coils, different sizes of roth coils require different diameter installation froge. If the froge can only install one model of roth coil, the installation time will be greatly increased when multiple roth coils need to be measured simultaneously.

[0005] 3. In the measurement of roth coils, different application scenarios have different requirements for measurement accuracy. In industrial sites with lower precision, multiple measurements are often required to take the average measurement method to ensure accuracy. INVENTION CONTENTS

[0006] The utility model provides a portable roth coil measurement froge which can simultaneously install multiple roth coils of different sizes, improving the installation efficiency during measurement.

[0007] To achieve the above purpose, the technical scheme of the utility model provides a portable roth coil measurement froge, which comprises,

[0008] The winding plate assembly part comprises multiple layers of winding plates with different diameters, which are distributed along the axis direction, and there is a gap between adjacent two winding plates; the winding plates all have coaxially arranged cavities; the winding plates are used to wind and fix the roth coil;

[0009] The connecting part is arranged between adjacent two winding plates and connects the adjacent two winding plates;

[0010] The support component is arranged at the bottom of the bottommost winding plate and supports the whole tooling;

[0011] The conductive current rod penetrates the cavities of the winding plates from top to bottom and is then fixed.

[0012] In the technical solution, the winding plate provides stable support for the wound Rogowski coil, ensures the regularity of winding, and helps to ensure the accuracy of the Rogowski coil in sensing the magnetic field change during metering. The adjacent winding plates are connected through the connecting component, which not only enhances the stability of the top structure of the tooling, but also provides protection for signal transmission and the integrity of the mechanical structure, so that the tooling will not affect the metering accuracy due to component loosening during work, and the stability of the whole tooling structure is improved. The conductive current rod guides the current through a specific path, which ensures current transmission during metering, makes the magnetic field distribution around the Rogowski coil uniform, and thus ensures that the Rogowski coil can accurately sense the magnetic field change caused by the current change and output a voltage signal.

[0013] According to the utility model, further, the winding plate combination component includes bottom winding plate, the support component is fixed in the lower surface of bottom winding plate.

[0014] According to the utility model, further, the winding plate combination component still includes middle layer winding plate located above the bottom winding plate, and the sizes and shapes of the two are same, and the connecting component is arranged between the two.

[0015] According to the utility model, further, the winding plate combination component still includes top layer winding plate located above the middle layer winding plate, and the top layer winding plate is same in shape with the middle layer winding plate, and the area is less than the middle layer winding plate, and the connecting component is arranged between the two, and the top layer support rod is fixed and arranged along the circumferential direction of the upper surface of the top layer winding plate.

[0016] According to the utility model, further, the support component includes inner ring and outer ring, and is evenly arranged along the circumferential direction of the lower surface of the bottom winding plate.

[0017] According to the utility model, further, the top surface of the bottom winding plate is provided with middle layer connecting rod along the circumference thereof, and the middle layer connecting rod is arranged in two rings, and is evenly arranged along the circumferential direction of the ring; the bottom of the middle layer connecting rod located in the outer ring is screwed with the bottom winding plate, and the middle layer connecting rod located in the inner ring is fixedly connected with the support component located in the inner ring; the top of the middle layer connecting plate is fixedly connected with the middle layer winding plate.

[0018] According to the utility model, further, the top layer support rod shares screw hole with the top layer connecting rod located outer circle.

[0019] According to the utility model, further, the top layer support rod shares screw hole with the top layer connecting rod located outer circle.

[0020] According to the utility model, further, each winding plate of the winding plate combination component is integrated by splicing unit, and the splicing unit size and shape of splicing same winding plate are same.

[0021] Compared with prior art, the utility model has the advantages that:

[0022] 1. The utility model discloses compact structure, convenient to carry, can be accurate to the accurate measurement operation of roth coil under various environments.

[0023] 2. The tool of the utility model is convenient to transport, install and disassemble, and greatly increases the usability of the tool.

[0024] 3. The utility model discloses can guarantee the installation of multiple roth circles simultaneously, and guarantee the installation efficiency in the measurement process.

[0025] 4. The utility model discloses can install three different sizes of roth coils simultaneously. DRAWINGS

[0026] Figure 1 It is the first visual angle structural schematic drawing of a portable roth coil measurement tool of the utility model;

[0027] Figure 2 It is the second visual angle structural schematic drawing of a portable roth coil measurement tool of the utility model;

[0028] Figure 3 It is the top view schematic drawing of a portable roth coil measurement tool of the utility model;

[0029] Figure 4 It is the front view schematic drawing of a portable roth coil measurement tool of the utility model.

[0030] Sign meaning: 1-top layer winding plate, 2-conductive current pole, 3-top layer connecting plate, 4-middle layer connecting rod, 5-bottom layer winding plate, 6-top layer support rod, 7-bottom layer connecting plate, 8-middle layer connecting plate, 9-middle layer winding plate, 10-bottom layer support rod, 11-top layer connecting rod. SPECIFIC EMBODIMENT

[0031] 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 skilled in the art without creative efforts belong to the scope of the present application.

[0032] As Figures 1-4 shown, the present application provides a portable Rogowski coil measuring tool for installing a Rogowski coil, connecting a measured current, and sensing a change in a magnetic field by the Rogowski coil, and generating a voltage signal proportional to a change rate of the measured current, so that relevant parameters of the measured current can be obtained by further processing and analysis of the voltage signal, and the Rogowski coil measurement function is realized. The Rogowski coil measuring tool comprises a bottom winding plate 5, which is a circular plate structure with a receiving cavity at the center, and a plurality of bottom support rods 10 are uniformly distributed along the bottom of the bottom winding plate 5 for supporting the bottom winding plate 5; the bottom winding plate 5 is composed of four splicing units with the same shape, and two adjacent splicing units are connected and fixed by a bottom connecting plate 7 to form a complete bottom winding plate; preferably, the bottom support rods 10 are sixteen, which are arranged in two circles, eight in the inner circle and eight in the outer circle, and are uniformly arranged along the circumferential direction of the respective circle.

[0033] The top surface of the bottom winding plate 5 is provided with a middle connecting rod 4 along the circumference thereof, the middle connecting rod 4 is sixteen, which are arranged in two circles, eight in the inner circle and eight in the outer circle, and are uniformly arranged along the circumferential direction of the respective circle; the bottom of the middle connecting rod 4 in the outer circle is screwed with the bottom winding plate 5, the middle connecting rod 4 in the inner circle is coaxially arranged with the bottom support rod 10 in the inner circle, and the middle connecting rod 4 is fixedly connected with the bottom support rod 10; a middle winding plate 9 with the same shape and size as the bottom winding plate 5 is connected to the top of the middle connecting rod 4, and the middle winding plate 9 is coaxially arranged with the bottom winding plate 5; the middle winding plate 9 is composed of four splicing units with the same shape, and two adjacent splicing units are connected and fixed by a middle connecting plate 8 to form a complete middle winding plate.

[0034] Also include the area is less than the top winding board 1 of the bottom winding board, the top winding board 1 center has the cavity with the same size and coaxial with the bottom winding board, the cavity is placed with vertical conductive current pole 2, the bottom of the conductive current pole 2 is provided with a wiring port and a disc for supporting, the disc is placed on the horizontal plane after sequentially penetrating each cavity from top to bottom, and the center of the disc is adjusted to coincide with the center of the cavity. The top winding board 1 is uniformly distributed with sixteen top connecting rods 11 along the circumference of its lower surface, eight in the inner circle and eight in the outer circle, wherein the bottom of the top connecting rod 11 in the inner circle is connected with the middle connecting rod 4 located in the inner circle, and the bottom of the top connecting rod in the outer circle is installed on the middle winding board 9. The top of the top winding board 1 is uniformly fixed with a top support rod 6 and a screw hole shared by the outer circle of the top connecting rod 11 along the circumferential direction of its upper surface. The top winding board 1 is spliced by four splicing units with the same shape, and two adjacent splicing units are connected and fixed by a top connecting plate 3 to form a complete top winding board.

[0035] Working principle: when the measured current is conducted through the conductive current pole 2, a magnetic field is generated around it. The Rogowski coil is wrapped around the outer periphery of each winding board. According to the principle of electromagnetic induction, the Rogowski coil will sense the change of the magnetic field and generate a voltage signal proportional to the change rate of the measured current. Through further processing and analysis of the voltage signal, the relevant parameters of the measured current can be obtained, and the measurement function of the Rogowski coil can be realized.

[0036] Working process:

[0037] Ensure that each part of the tool is complete and undamaged: check the winding of the top winding board 1, the middle winding board 9 and the bottom winding board 5. If there is looseness or damage, it should be repaired in time;

[0038] Check the connection firmness of the conductive current pole 2: correctly install the Rogowski coil to be measured on the winding board of the tool, ensure that the coil is tightly attached to the winding board, and the lead wire of the coil is connected to the corresponding measurement circuit interface. Connect the measured current source to the conductive current pole 2 to ensure stable and safe current access. During the access process, pay attention to the size and direction of the current meeting the measurement requirements;

[0039] Measurement operation: start the measurement equipment (such as oscilloscope, ammeter and other related measurement instruments), observe and record the measurement data; analyze the measurement data and evaluate the performance parameters of the Rogowski coil, such as linearity and sensitivity;

[0040] Disassembly and storage: after the measurement is completed, disconnect the measured current source, then carefully disassemble the Rogowski coil; arrange the parts of the tool well and store them in a special portable box for next use.

[0041] Before and after use, the tooling is checked and maintained to ensure that each component is normal. During operation, attention should be paid to prevent static electricity, electromagnetic interference and other influences on the measurement results, and try to use in a stable electromagnetic environment. When connecting and disconnecting the current, make sure the operation is standard to avoid current impact on the tooling and measuring instruments. Avoiding the tooling from being hit, vibration and other, so as to avoid affecting its structural stability and measurement accuracy.

[0042] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A portable Roebel coil metrology fixture, characterized by, include, The winding plate assembly includes multiple winding plates of different diameters, distributed along the axial direction, with a gap between adjacent winding plates; each winding plate has a coaxially arranged cavity; the winding plates are used to wind and fix Rogowski coils. A connecting component is disposed between two adjacent winding plates to connect the two adjacent winding plates; The support component is located at the bottom of the lowest winding plate and serves to support the entire fixture. The conductive current rod passes through the cavity of each winding plate from top to bottom and is then fixed.

2. A portable Roebel coil gauging tool as claimed in claim 1, wherein, The winding board assembly includes a bottom winding board, and the support component is fixed to the lower surface of the bottom winding board.

3. A portable Roebel coil gauging fixture as claimed in claim 2, wherein, The winding board assembly also includes a middle winding board located above the bottom winding board. The two are the same size and shape, and a connecting component is provided between them.

4. A portable Roebel coil gauging fixture as claimed in claim 3, wherein, The winding plate assembly also includes a top winding plate located above the middle winding plate. The top winding plate has the same shape as the middle winding plate but a smaller area. A connecting component is provided between the two. Top support rods are evenly distributed and fixed along the circumferential direction of the upper surface of the top winding plate.

5. A portable Roebel coil gauging fixture as claimed in claim 4, wherein, The support component includes an inner ring and an outer ring, both of which are evenly arranged along the lower surface of the bottom winding plate in the circumferential direction of their respective rings.

6. A portable Roebel coil gauging fixture as claimed in claim 5, wherein, The top surface of the bottom winding plate is equipped with a middle layer connecting rod along its circumference. The middle layer connecting rod is arranged in two concentric circles, which are evenly distributed along the circumference of their respective circles. The bottom of the middle layer connecting rod located in the outer circle is screwed to the bottom winding plate, and the middle layer connecting rod located in the inner circle is coaxially and fixedly connected to the support component located in the inner circle. The top of the middle layer connecting plate is fixedly connected to the middle layer winding plate.

7. A portable Rogowski coil metering fixture as described in claim 6, characterized in that, The top winding plate has top layer connecting rods evenly distributed along its lower surface circumference, arranged concentrically in inner and outer rings, with the number of each ring being the same as the number of middle layer connecting rods; the bottom of the top layer connecting rod located in the inner ring is connected to the middle layer connecting rod located in the inner ring, and the bottom of the top layer connecting rod in the outer ring is mounted on the middle layer winding plate.

8. A portable Rogowski coil metering fixture as described in claim 7, characterized in that, The top-level support rod and the top-level connecting rod located on the outer ring share a screw hole.

9. A portable Rogowski coil metering fixture as described in claim 1, characterized in that, Each winding board in the winding board assembly is spliced ​​together by splicing units, and the splicing units splicing the same winding board are the same size and shape.

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