Diamagnetic mutual inductor

Abstract

The utility model discloses a diamagnetic mutual inductor. The diamagnetic mutual inductor comprises a housing and a base, an assembling seat is formed on the base, the assembling seat is a sheet support and is provided with a U-shaped outline structure, the assembling seat and the base are integrally formed at the middle section of the U-shaped outline, and an assembling part for assembling the iron core and the winding is formed on the surface of the middle section of the U-shaped outline; a first side plate and a second side plate are formed on the two sides of the middle section of the assembling base correspondingly. The first side plate is provided with an abutting part abutting against the iron core and / or the winding; the housing covers the surface of the base; a diamagnetic structure layer is formed on the cavity wall of the accommodating cavity of the housing; blind grooves matched with the second side plates in size are formed in the side walls of the two sides of the housing, and when the housing covers the surface of the base, the second side plates are embedded in the blind grooves. According to the utility model, the problem of magnetic field interference in an electric power system can be effectively solved, and stable operation and accurate metering of the mutual inductor in a complex environment are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, in particular to an anti-magnetic mutual inductor. Background Art

[0002] A transformer is a commonly used device in power systems. It is a general term for current transformers and voltage transformers. Its working principle is mainly based on electromagnetic induction, which converts high voltage or large current into standard low voltage or standard small current in proportion, thereby facilitating the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment.

[0003] A transformer usually consists of a main coil (also called a primary coil or primary coil) and a secondary coil (also called a secondary coil or secondary coil). The main coil generates a magnetic field through the input current, and the secondary coil induces an electric potential through the change of the magnetic field, thereby realizing signal conversion and transmission. In actual use, in power facilities such as substations in the power system, due to various reasons such as load changes and power grid failures, strong external magnetic fields will be generated. These magnetic fields will pose a potential threat to the normal operation of the transformer, resulting in inaccurate measurements or unstable performance. Therefore, in order to ensure the stability and accuracy of the transformer in a complex electromagnetic environment, it is particularly important to design an anti-magnetic transformer. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a magnetic transformer to solve the defects in the above technical background.

[0005] The technical problem solved by the utility model is achieved by the following technical solutions:

[0006] A diamagnetic mutual inductor, comprising a cover and a base;

[0007] The base is formed with an assembly seat, which is a thin sheet bracket formed of DT4A electrical pure iron and has a U-shaped profile structure. The assembly seat is formed as a whole with the base at the middle section of the U-shaped profile, and an assembly portion for assembling the iron core and the winding is formed on the surface of the middle section of the U-shaped profile; the assembly seat is respectively formed with a first side plate and a second side plate on both sides of the middle section;

[0008] The first side plate has a supporting portion for supporting the iron core and / or the winding;

[0009] The cover shell is covered on the surface of the base, and the inner side of the cover shell has a receiving cavity for receiving the iron core and the winding; the cover shell forms an anti-magnetic structure layer on the cavity wall of the receiving cavity;

[0010] The cover shell is formed with blind grooves matching the size of the second side plate on both side walls. When the cover shell is covered on the surface of the base, the second side plate is embedded in the blind grooves.

[0011] As a further limitation, the assembly seat is a detachable assembly structure on the base;

[0012] The assembly seat and the base are formed with matching positioning step grooves on the opposite sides. When assembling, the assembly seat is first positioned on the base through the positioning step groove, and then fixed in position by threaded fasteners.

[0013] The assembly seat is composed of two L-shaped structural pieces, and a single L-shaped structural piece can be independently disassembled on the base.

[0014] As a further limitation, the assembly seat is subjected to surface spraying treatment as a whole.

[0015] As a further limitation, the lower portion of the cover shell has an offset step that matches the outer edge of the base, and the cover shell is positioned and covered on the surface of the base through the offset step.

[0016] As a further limitation, the base is a galvanized steel structure or a PBT material structure; the cover is a glass fiber reinforced plastic structure, a galvanized steel structure or a PBT material structure.

[0017] As a further limitation, the antimagnetic structural layer is one or a combination of a conductive plastic layer, a conductive cloth lining layer, a graphite lining layer, and a metal fabric layer.

[0018] As a further limitation, the first side plate and the second side plate are staggered in the width direction of the middle section of the assembly seat.

[0019] Beneficial effects: The utility model provides an anti-magnetic mutual inductor with a simple structure and convenient manufacturing. It can be widely used in power facilities such as substations in power systems to realize accurate measurement and protection of power system currents. By matching the assembly seat and the cover, it can effectively reduce or eliminate the influence of the external magnetic field on the performance of the mutual inductor while improving the maintainability and structural stability of the equipment, and improve the stability and accuracy of the mutual inductor in complex electromagnetic environments. At the same time, the anti-magnetic structure layer on the inside of the cover can further enhance the anti-magnetic ability of the mutual inductor, improve its measurement accuracy and stability, and thus improve the operating efficiency and stability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model.

[0021] Figure 2 for Figure 1 Structural style diagram of the medium L-shaped structural piece.

[0022] Among them: 1. cover shell; 2. anti-magnetic structure layer; 3. iron core and winding; 4. second side plate; 5. first side plate; 6. assembly seat; 7. assembly bolts; 8. assembly frame; 9. threaded assembly hole; 10. base; 11. positioning step groove; 12. countersunk threaded hole; 13. horizontal plate surface. DETAILED DESCRIPTION

[0023] 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 with reference to specific illustrations.

[0024] See also Figure 1 A preferred embodiment of a diamagnetic mutual inductor is provided, and the diamagnetic mutual inductor of this embodiment comprises an independently formed base 10 and a cover 1. The main body of the base 10 is a PBT material structure, and the base 10 has a step surface as a positioning and assembly structure at the outer edge of the structural contour, while the main body of the cover 1 is a galvanized steel structure, and the inner side of the cover 1 has a receiving cavity for receiving the iron core and the winding 3, and the cover 1 has a diamagnetic structural layer 2 formed on the inner side surface of the receiving cavity; the cover 1 has a misaligned step at the lower outer edge that matches the step surface of the outer edge of the base 10, so that the cover 1 can be positioned and covered on the surface of the base 10 by matching the misaligned step with the step surface.

[0025] In different embodiments, the antimagnetic structure layer 2 may be one or a combination of a conductive plastic layer, a conductive cloth lining layer, a graphite lining layer, and a metal fabric layer.

[0026] In this embodiment, a plurality of threaded assembly holes 9 are formed on the base 10, and the cover shell 1 has matching threaded holes that match the threaded assembly holes 9. After the cover shell 1 is covered on the base 10, the matching threaded holes and the threaded assembly holes 9 are aligned, and after the alignment is completed, the assembly bolts 7 can be used to complete the fixed assembly of the two.

[0027] An assembly frame 8 is formed on the surface of the base 10 by welding, and the base 10 is detachably assembled and connected with the assembly seat 6 through the assembly frame 8. The assembly seat 6 is a thin sheet bracket structure formed of DT4A electrical pure iron. In different embodiments, the assembly seat 6 can be a single U-shaped structure or a U-shaped structure composed of two L-shaped structural sheets; the assembly seat 6 is subjected to a surface spraying treatment as a whole, which can enhance the surface hardness of the assembly seat 6 and prevent it from rusting, thereby ensuring the service life of the mutual inductor.

[0028] In this embodiment, the assembly seat 6 is composed of two L-shaped structural pieces, which are symmetrical and parallel to each other on the base 10, and a single L-shaped structural piece can be independently disassembled on the assembly frame 8 of the base 10. The structural style of a single L-shaped structural piece is as follows: Figure 2 As shown, the L-shaped structural sheet includes a horizontal plate surface 13, and the horizontal plate surface 13 is Figure 1 A positioning step groove 11 is formed on the inner side of the position of the assembly frame 8, and an embedding groove matching the positioning step groove 11 is formed on the surface of the assembly frame 8. Through the positioning and matching of the embedding groove and the positioning step groove 11, the assembly accuracy of the assembly seat 6 on the base 10 can be effectively guaranteed, so that the assembly seat 6 can be accurately and stably placed on the base 10. The single L-shaped structural piece is also provided with a plurality of countersunk threaded holes matching the assembly frame 8 on the horizontal plate surface 13. When assembling, the assembly seat 6 is first positioned and placed on the base 10 through the positioning step groove 11, and after placement, the countersunk screw is used to pass through the countersunk threaded holes 12 on the assembly frame 8 and the base 10 on the bottom surface to fix the position, and the head of the countersunk screw is embedded in the countersunk threaded hole 12 to ensure the flatness of the lower surface of the assembly frame 8.

[0029] The surface of the assembly seat 6 is formed with an assembly portion for assembling the iron core and the winding 3. The assembly portion is a recessed structure in the middle section of the U-shaped profile. The size of the recessed structure matches the outer edge of the iron core and the winding 3, so that the iron core and the winding 3 can be stably placed on the assembly portion.

[0030] The assembly seat 6 is formed with a first side plate 5 and a second side plate 4 on the outside of the horizontal plate surface 13 of the L-shaped structural piece on both sides. The first side plate 5 and the second side plate 4 are staggered in the width direction of the horizontal plate surface 13 (corresponding to the viewing direction of the figure). In this embodiment, the first side plate 5 is bent and formed on the outside of the position of the positioning step groove 11, and the second side plate 4 is bent and formed on the outside of the main body of the horizontal plate surface 13. Figure 2 shown.

[0031] The upper inner side of the first side plate 5 has a contact surface against the iron core and / or winding 3 to limit the position of the iron core and winding 3. The upper outer edge of the first side plate 5 and the iron core and / or winding 3 can also be connected by glue dispensing when necessary. Blind grooves matching the size of the second side plate 4 are formed on the side walls of the housing 1. When the housing 1 is covered on the surface of the base 10, the second side plate 4 can be embedded in the blind groove, thereby achieving positioning between the assembly seat 6 and the housing 1 and ensuring the stability of the transformer structure.

[0032] To sum up, the anti-magnetic mutual inductor of the utility model not only improves the maintainability and structural stability of the equipment through the matching setting of the assembly seat 6 and the cover 1, but also can effectively reduce the influence of the external magnetic field on the performance of the mutual inductor through the setting of the anti-magnetic structural layer 2 on the inner side of the cover 1 in conjunction with the assembly seat 6, thereby improving the stability and accuracy of the mutual inductor in a complex electromagnetic environment, thereby ensuring the reliability and safety of the power system.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the scope of protection of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the scope of protection defined by the claims attached to this application.

Claims

1. A diamagnetic mutual inductor, characterized in that: Including a cover and a base; The base is formed with an assembly seat, which is a thin sheet bracket formed of DT4A electrical pure iron and has a U-shaped profile structure. The assembly seat is formed as a whole with the base at the middle section of the U-shaped profile, and an assembly portion for assembling the iron core and the winding is formed on the surface of the middle section of the U-shaped profile; the assembly seat is respectively formed with a first side plate and a second side plate on both sides of the middle section; The first side plate has a supporting portion for supporting the iron core and / or the winding; The cover shell is covered on the surface of the base, and the inner side of the cover shell has a receiving cavity for receiving the iron core and the winding; the cover shell forms an anti-magnetic structure layer on the cavity wall of the receiving cavity; The cover shell is formed with blind grooves matching the size of the second side plate on both side walls. When the cover shell is covered on the surface of the base, the second side plate is embedded in the blind grooves.

2. The anti-magnetic mutual inductor according to claim 1, characterized in that: The assembly seat is a detachable assembly structure on the base.

3. The anti-magnetic mutual inductor according to claim 2, characterized in that: The assembly seat and the base are formed with matching positioning step grooves on the opposite sides. When assembling, the assembly seat is first positioned on the base through the positioning step groove, and then fixed in position by threaded fasteners.

4. The anti-magnetic mutual inductor according to claim 2, characterized in that: The assembly seat is composed of two L-shaped structural pieces, and a single L-shaped structural piece can be independently disassembled on the base.

5. The anti-magnetic mutual inductor according to claim 1, characterized in that: The assembly seat is subjected to a surface spraying treatment as a whole.

6. The diamagnetic mutual inductor according to claim 1, characterized in that: The lower part of the cover shell has a misalignment step that matches the outer edge of the base, and the cover shell is positioned and covered on the surface of the base through the misalignment step.

7. The anti-magnetic mutual inductor according to claim 1, characterized in that: The base is a galvanized steel structure or a PBT material structure; the cover shell is a glass fiber reinforced plastic structure, a galvanized steel structure or a PBT material structure.

8. The anti-magnetic mutual inductor according to claim 1, characterized in that: The antimagnetic structural layer is one or a combination of a conductive plastic layer, a conductive cloth lining layer, a graphite lining layer, and a metal fabric layer.

9. The diamagnetic mutual inductor according to claim 1, characterized in that: The first side plate and the second side plate are staggered in the width direction of the middle section of the assembly seat.

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