Environment-friendly anti-interference mutual inductor

Abstract

This utility model relates to the field of current transformer technology and discloses an environmentally friendly anti-interference current transformer, including two current transformer housings. Current transformer assemblies are disposed inside the two current transformer housings, and bases are installed on the bottom surfaces of both current transformer housings. This environmentally friendly anti-interference current transformer facilitates disassembly of the current transformer housings by setting a fixing plate on the upper surface of the housings and connecting them with bolts, while also using a snap-fit ​​mechanism between the two housings. This facilitates the recycling of the internal components. During use, the secondary winding coil is spirally and uniformly wound, reducing the distributed capacitance and inductance of the winding and enhancing the overall anti-interference capability. As the cable passes through the middle area of ​​the current transformer housing, it is guided by a limiting rope to be as close as possible to the center of the iron core, reducing the problem of uneven magnetic field distribution within the iron core caused by eccentricity and improving the anti-interference capability.

Description

Technical Field

[0001] This utility model relates to the field of instrument transformer technology, specifically to an environmentally friendly anti-interference instrument transformer. Background Technology

[0002] Instrument transformers, also known as instrument transformers, are a general term for current transformers and voltage transformers. They can transform high voltage into low voltage and large current into small current, and are used in measurement or protection systems to achieve standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. Traditional instrument transformers are manufactured in one piece, which requires cutting during replacement and maintenance, causing environmental pollution. Instrument transformers are also susceptible to external environmental influences and have poor anti-interference performance.

[0003] An existing patent (publication number: CN211319920U) discloses an environmentally friendly anti-interference current transformer, including a current transformer housing, a current transformer body, a coil connector, and a magnetic core connection mechanism. The current transformer housing includes a current transformer protective shell, and the front and rear side walls of the current transformer protective shell are provided with through holes of equal size. The current transformer protective shell is connected to the lower cover of the current transformer housing by bolts. The upper surface of the lower cover of the current transformer housing is symmetrically provided with winding coil connection posts. The current transformer body is disposed inside the current transformer protective shell. The current transformer body includes a magnetic core one and a magnetic core two. The lower ends of magnetic core one and magnetic core two are connected by a rotating shaft. A primary winding coil and a secondary winding coil are respectively provided on magnetic core one and magnetic core two.

[0004] In the process of use, the above-mentioned patent connects the lower ends of the primary winding coil and the secondary winding coil to the winding coil connecting post by crossing each other. This connection method can further cancel the interference of external magnetic fields and improve the anti-interference ability. However, it is a small improvement compared to the original winding structure of common current transformers, and the improvement of anti-interference ability is limited. At the same time, its outer shell is relatively inconvenient to disassemble, making it difficult to disassemble and recycle the whole unit. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an environmentally friendly anti-interference transformer with the advantages of strong anti-interference capability and easy disassembly, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly anti-interference transformer, comprising two transformer housings, transformer assemblies disposed inside the two transformer housings, a base mounted on the bottom surface of each of the two transformer housings, a fixing plate fixed on the upper surface of each base, and the fixing plates of the two transformer housings being connected by bolts.

[0007] The current transformer assembly includes an iron core and a secondary winding coil. The secondary winding coil is spirally and uniformly tightly wound to reduce the distributed capacitance and inductance of the winding. The distributed parameters are easy to resonate with interference signals, amplifying the interference. The front of the base is provided with a secondary terminal, which is connected to its corresponding secondary winding coil.

[0008] Both of the aforementioned transformer housings have a fixed shell on their inner walls. The top of the fixed shell is semi-circular. A limit rope is installed inside the fixed shell. One end of the limit rope is fixed to the inner wall of the fixed shell. A lifting plate is slidably connected to the inner wall of the fixed shell. The other end of the limit rope passes through the arc at the top of the fixed shell and is fixed to the lifting plate.

[0009] Furthermore, a reset spring and a reset telescopic rod are installed on the inner wall of the fixed shell, and the other end of the reset spring and the reset telescopic rod are connected to the lifting plate.

[0010] With the above solution, the elastic force of the reset spring can pull the lifting plate to reset, so that when the external cable passes through the middle area between the limiting rope and the fixed shell, the limiting rope can tighten the external cable.

[0011] Furthermore, the outer surface of the fixed shell is flush with the outer surface of the transformer housing.

[0012] The above scheme can maintain the stability of the fixed shell during use. At the same time, the outer side of the fixed shell is flush with the outer side of the transformer shell, so that when the external cable is wound, the cable is as close as possible to the center of the iron core when passing through the middle area of ​​the transformer shell, which reduces the uneven distribution of the magnetic field in the iron core caused by eccentricity.

[0013] Furthermore, a snap-fit ​​ring is fixed to the back of the current transformer housing located at the front, and a corresponding snap-fit ​​groove is opened on the front of the current transformer housing located at the rear, and the snap-fit ​​ring snaps into the snap-fit ​​groove.

[0014] The above solution maintains the stability of the installation between the two transformer housings by engaging the snap-fit ​​ring and the snap-fit ​​groove.

[0015] Furthermore, the secondary winding coil uses multi-strand stranded wire.

[0016] The above solution uses multi-strand stranded wire instead of common single-strand wire to reduce high-frequency impedance caused by skin effect and reduce high-frequency interference loss and distortion in the winding.

[0017] Furthermore, the upper surface of the base is provided with a mounting groove.

[0018] The above solution allows the base to be fixed to an external mounting platform via the mounting slot.

[0019] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0020] This environmentally friendly anti-interference transformer features a fixed plate on the upper surface of the transformer housing, connected by bolts. The interlocking between two transformer housings facilitates disassembly and recycling of internal components. During use, the secondary winding coil is spirally and evenly wound, reducing distributed capacitance and inductance, thus enhancing overall anti-interference capabilities. As the cable passes through the middle area of ​​the transformer housing, it is guided by a limiting rope to approach the center of the iron core, minimizing uneven magnetic field distribution within the core due to eccentricity and further improving anti-interference performance. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present application;

[0022] Figure 2 This is a diagram showing the internal structure of the overall current transformer housing in this application;

[0023] Figure 3 This is a side view of the overall current transformer housing of this application;

[0024] Figure 4 This is a sectional view of the side view of the overall fixed shell of this application;

[0025] Figure 5 For the purposes of this application as a whole Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0026] Figure 6 For the purposes of this application as a whole Figure 4 Enlarged schematic diagram of the structure at point B.

[0027] In the picture:

[0028] 1. Current transformer housing;

[0029] 2. Current transformer assembly; 201. Iron core; 202. Secondary winding coil;

[0030] 3. Base; 4. Fixing plate; 5. Secondary wiring terminal; 6. Fixing shell; 7. Limiting rope; 8. Lifting plate; 9. Return spring; 10. Return telescopic rod; 11. Snap ring; 12. Mounting slot. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 2 and Figure 3 An environmentally friendly anti-interference transformer in this embodiment includes two transformer housings 1, with transformer assemblies 2 disposed inside the two transformer housings 1. A base 3 is installed on the bottom surface of each of the two transformer housings 1, and a fixing plate 4 is fixed on the upper surface of each base 3. The fixing plates 4 of the two transformer housings 1 are connected to each other by bolts.

[0033] Please see Figure 1 , Figure 2 and Figure 3 The current transformer assembly 2 includes an iron core 201 and a secondary winding coil 202. The secondary winding coil 202 is spirally and uniformly wound to reduce the distributed capacitance and inductance of the winding. The distributed parameters are easy to resonate with interference signals, amplifying the interference. The front of the base 3 is provided with a secondary terminal 5, which is connected to its corresponding secondary winding coil 202.

[0034] Please see Figure 2 , Figure 4 and Figure 5 The inner walls of the two transformer housings 1 are each fixed with a fixed housing 6. The top of the fixed housing 6 is semi-circular. The inside of the fixed housing 6 is provided with a limit rope 7. One end of the limit rope 7 is fixed to the inner wall of the fixed housing 6. The inner wall of the fixed housing 6 is slidably connected with a lifting plate 8. The other end of the limit rope 7 passes through the arc at the top of the fixed housing 6 and is fixed to the lifting plate 8.

[0035] Please see Figure 4 , Figure 5 and Figure 6 The inner wall of the fixed shell 6 is equipped with a reset spring 9 and a reset telescopic rod 10. The other end of the reset spring 9 and the reset telescopic rod 10 is connected to the lifting plate 8. The elastic force of the reset spring 9 can pull the lifting plate 8 to reset, so that when the external cable passes through the middle area between the limiting rope 7 and the fixed shell 6, the limiting rope 7 can tighten the external cable.

[0036] Please see Figure 1 , Figure 4 and Figure 5The outer side of the fixed shell 6 is flush with the outer side of the transformer shell 1, which can maintain the stability of the fixed shell 6 during use. At the same time, the outer side of the fixed shell 6 is flush with the outer side of the transformer shell 1, which also makes the external cable as close as possible to the center of the iron core 201 when the cable passes through the middle area of ​​the transformer shell 1, reducing the uneven distribution of the magnetic field in the iron core 201 caused by eccentricity.

[0037] Please see Figure 1 , Figure 2 and Figure 3 A snap-fit ​​ring 11 is fixed on the back of the current transformer housing 1 located at the front, and a corresponding snap-fit ​​groove is opened on the front of the current transformer housing 1 located at the rear. The snap-fit ​​ring 11 snaps into the snap-fit ​​groove. The snap-fit ​​ring 11 and the snap-fit ​​groove maintain the stability of the installation between the two current transformer housings 1. The secondary winding coil 202 adopts multi-strand stranded wire. By replacing the common single-strand wire with multi-strand stranded wire, the high-frequency impedance caused by the skin effect is reduced, and the loss and distortion of high-frequency interference in the winding are reduced. The upper surface of the base 3 is provided with a mounting groove 12. The base 3 can be fixed to the external mounting platform through the mounting groove 12.

[0038] It should be noted that during use, first pull the limiting rope 7 and pass the external cable through the area between the limiting rope 7 and the fixed shell 6 to complete one cable threading.

[0039] The working principle of the above embodiment is as follows: During use, a fixing plate 4 is set on the upper surface of the current transformer housing 1 and connected with bolts. At the same time, the mutual snap-fit ​​between the two current transformer housings 1 facilitates the disassembly of the current transformer housing 1. When recycling the scrapped current transformer, the bolts can be removed to separate the current transformer housing 1 and retrieve the recyclable internal parts, thereby improving the overall recycling rate.

[0040] During use, the secondary winding coil 202 is spirally and evenly wound to reduce the distributed capacitance and inductance of the winding, thereby enhancing the overall anti-interference capability. The spring force of the reset spring 9 can pull the lifting plate 8 to reset, so that when the external cable passes through the middle area between the limiting rope 7 and the fixed shell 6, the limiting rope 7 can tighten the external cable. The outer side of the fixed shell 6 is flush with the outer side of the transformer shell 1, so that when the external cable is wound, it is as close as possible to the center of the iron core 201 when passing through the middle area of ​​the transformer shell 1, reducing the uneven distribution of the magnetic field in the iron core 201 caused by eccentricity and improving the anti-interference capability.

[0041] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly anti-interference current transformer, comprising two transformer housings (1), characterized in that: The two transformer housings (1) are provided with transformer assemblies (2) inside. The bottom surfaces of the two transformer housings (1) are each equipped with a base (3). The upper surfaces of the bases (3) are each fixed with a fixing plate (4). The fixing plates (4) of the two transformer housings (1) are connected to each other by bolts. The transformer assembly (2) includes an iron core (201) and a secondary winding coil (202). The secondary winding coil (202) is spirally and evenly wound. The base (3) has a secondary terminal (5) on its front side, and the secondary terminal (5) is connected to its corresponding secondary winding coil (202). The inner walls of the two transformer housings (1) are each fixed with a fixed shell (6). The top of the fixed shell (6) is semi-circular. A limiting rope (7) is provided inside the fixed shell (6). One end of the limiting rope (7) is fixed to the inner wall of the fixed shell (6). A lifting plate (8) is slidably connected to the inner wall of the fixed shell (6). The other end of the limiting rope (7) passes through the arc at the top of the fixed shell (6) and is fixed to the lifting plate (8).

2. The environmentally friendly anti-interference mutual inductor according to claim 1, characterized in that: The inner wall of the fixed shell (6) is equipped with a reset spring (9) and a reset telescopic rod (10), and the other end of the reset spring (9) and the reset telescopic rod (10) is connected to the lifting plate (8).

3. The environmentally friendly anti-interference mutual inductor according to claim 1, characterized in that: The outer side of the fixed shell (6) is flush with the outer side of the transformer shell (1).

4. The environmentally friendly anti-interference mutual inductor according to claim 1, characterized in that: A snap ring (11) is fixed on the back of the transformer housing (1) located at the front, and a corresponding snap groove is opened on the front of the transformer housing (1) located at the rear, and the snap ring (11) is snapped into the snap groove.

5. The environmentally friendly anti-interference mutual inductor according to claim 1, characterized in that: The secondary winding coil (202) uses multi-strand stranded wire.

6. The environmentally friendly anti-interference transformer of claim 1, wherein: The upper surface of the base (3) is provided with an installation groove (12).

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