Magnetic core mutual inductor with magnetic core convenient to replace

Abstract

The invention provides a magnetic core mutual inductor with a magnetic core convenient to replace, and relates to the technical field of magnetic core mutual inductors. The magnetic core mutual inductor with the magnetic core convenient to replace comprises a base. Through the matching design of the limiting blocks between the base sinking groove and the connecting seat and the circumferentially distributed limiting grooves, the connecting seat can be positioned along a plurality of preset angles, the magnetic core can be adaptively adjusted along with the angle of a mounting base plane, and the magnetic core can be quickly positioned and locked by adopting a quick locking structure that the upper shell and the lower shell are hinged and matched through a transverse and longitudinal dual positioning and locking mechanism. Opening and closing of the upper shell and the lower shell can be completed through one-hand operation, the disassembly and assembly time for magnetic core replacement or maintenance is greatly shortened, through collaborative design of a graphene heat conduction layer, a phase change heat storage layer and a flexible buffer layer, heat conduction and absorption capacity are enhanced, meanwhile, thermal expansion stress is counteracted through a flexible material, heat dissipation efficiency improvement and structural reliability are both considered, and the application range is wide. And the technical defects of high-temperature accumulation and material deformation easily caused by a single heat dissipation layer design are overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic core mutual inductor, in particular to a magnetic core mutual inductor with convenient magnetic core replacement. BACKGROUND

[0002] The mutual inductor is also called instrument transformer, which is the general term of current transformer and voltage transformer, can change high voltage into low voltage and large current into small current, and is used for measurement or protection system, the main function of which is to change high voltage or large current into standard low voltage (100V) or standard small current (5A or 1A, all refer to rated value) in proportion, so as to realize the standardization and miniaturization of measuring instrument, protection equipment and automatic control equipment, and the mutual inductor can also be used to isolate high voltage system to ensure the safety of personnel and equipment.

[0003] In order to facilitate the replacement of magnetic, the prior art proposes many types of open current transformers, but the existing open current transformer installation method is single, cannot be adjusted and installed, affects the use effect, secondly, the heat dissipation effect of the current transformer is poor, which can cause the current transformer to burn out and cause fire, for this, there is a disclosed technology to propose a kind of amorphous alloy magnetic core current transformer, including lower shell, the upper end of the lower shell is provided with upper shell, the side end of the upper shell and the lower shell is provided with connecting block, the upper end of the connecting block is provided with bolt, the lower end of the lower shell is provided with fixed mounting block, the side end of the fixed mounting block is provided with movable mounting block, the upper end of the fixed mounting block and the movable mounting block is provided with mounting hole, the lower end of the lower shell is provided with sliding groove, the upper end of the movable mounting block is provided with sliding block. The connecting block, the upper shell and the lower shell are fixedly connected, the upper shell and the lower shell are threadedly connected through the connecting block and the bolt, the number of the connecting block is four, and is symmetrically arranged, the number of the bolt is four, and is arrayed. The fixed mounting block and the lower shell are fixedly connected, the mounting hole penetrates the upper end of the outer surface of the fixed mounting block and the movable mounting block, the number of the mounting hole is four, and is arrayed. The sliding groove is embedded in the lower end of the outer surface of the lower shell, the movable mounting block and the sliding block are fixedly connected, the movable mounting block and the lower shell are slidably connected through the sliding groove and the sliding block. The side end of the upper shell and the lower shell is provided with explosion-proof layer, the explosion-proof layer is fixedly connected with the upper shell and the lower shell, the side end of the explosion-proof layer is provided with fire-retardant filler, the fire-retardant filler is fixedly connected with the explosion-proof layer. The inside of the upper shell and the lower shell is provided with coil, the coil is movably connected with the upper shell and the lower shell, the side end of the coil is provided with heat dissipation layer, the heat dissipation layer is movably connected with the upper shell and the lower shell, the lower end of the connecting block is provided with sealing layer, the sealing layer is fixedly connected with the connecting block. The disclosed technology is that the amorphous alloy magnetic core current transformer has simple structure, convenient to use, high safety, convenient to adjust the installation position, easy to install and disassemble;

[0004] However, the above disclosed technology has the following defects in use, first, although it can adapt to different opening size installation holes, but the magnetic core axial and installation position cannot be adjusted, second, the upper shell and the lower shell are fixed by multiple bolts, which is not convenient to disassemble, third, only a single structure heat dissipation layer is arranged, which limits the heat dissipation effect, therefore, it is necessary to further improve the structure to overcome the above defects. SUMMARY

[0005] To address the shortcomings of existing technologies, this invention provides a magnetic core transformer with a convenient core replacement mechanism, which solves the problems of existing magnetic core transformers with convenient core replacement mechanisms, such as the inability to adjust the axial position of the magnetic core during installation, the inconvenience of disassembly due to excessive bolts, and the unsatisfactory heat dissipation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a magnetic core transformer for easy core replacement, comprising a base, an elastic layer at the bottom of the base, a recessed groove penetrating the bottom of the base, a connecting seat slidably connected to the inner wall of the recessed groove, a limiting structure between the connecting seat and the recessed groove for restricting the circumferential rotation of the connecting seat, a support column fixedly connected to the upper wall of the connecting seat, the upper end of the support column penetrating the upper wall of the base and fixedly connected to a housing, the housing being composed of an upper and lower shell that can be opened and closed, and a first connecting block provided on the left side of both the upper and lower shells, the two sets of first connecting blocks being connected to each other. The upper and lower housings are rotatably connected by pivot pins. A second connecting block is provided on the right side of both the upper and lower housings. A locking block is slidably connected to the outer wall of the two sets of second connecting blocks on the side away from the outer shell. A connecting groove is provided on the side of the locking block facing the outer shell. A first positioning structure is provided between the locking block and the two sets of second connecting blocks to prevent the locking block from shifting in the left and right directions. A second positioning structure is provided between the locking block and the two sets of second connecting blocks to prevent the locking block from shifting in the front and back directions. A magnetic core assembly and an inner protective plate are arranged sequentially from the outside to the inside of the outer wall of the outer shell. A heat dissipation layer is provided between the outer wall of the magnetic core assembly and the inner wall of the outer shell to improve heat dissipation.

[0007] To enable multi-angle installation and adjustment of the magnetic core assembly, preferably, the limiting structure includes multiple sets of limiting grooves and a set of limiting blocks. The limiting blocks are fixedly connected to the outer circumferential wall of the connecting seat. The multiple sets of limiting grooves are all arranged on the inner sidewall of the sink. The multiple sets of limiting grooves are evenly distributed in a circle with the sink axis as the center. When the connecting seat is slidably connected to the sink, the limiting block is slidably connected to the inner sidewall of any one of the multiple sets of limiting grooves.

[0008] When it is necessary to adjust the installation angle of the magnetic core assembly, the connector is removed from under the groove and positioned by connecting with different limiting slots through the limiting block, so that the magnetic core axis is adaptively aligned with the mounting base, thus solving the problem of adaptability in narrow spaces caused by the fixed and unadjustable magnetic core in the existing technology.

[0009] To ensure that the elastic layer provides stable deformation compensation under pressure, preferably, the height of the connecting seat is greater than the height of the sink and the height difference is equal to the theoretical deformation of the elastic layer after compression.

[0010] When the base is affected by uneven mounting surface or vibration, the compression deformation of the elastic layer can buffer the deformation, while ensuring that the base can press firmly against the connecting seat.

[0011] To optimize the ease of opening and closing the outer shell, preferably, the first positioning structure includes two sets of slots and two sets of blocks. The two sets of slots are respectively located on opposite sides of the two sets of second connecting blocks. The two sets of blocks are respectively located on the upper inner wall and the lower inner wall of the connecting slot. After the two sets of second connecting blocks abut against each other, they slide together with the inner wall of the connecting slot. When connected, the two sets of blocks slide with the inner wall of one set of slots respectively.

[0012] Preferably, the second positioning structure includes a positioning pin, a spring, a set screw, and two sets of semi-circular grooves. The two sets of semi-circular grooves are respectively located at the junction of the side of one set of second connecting blocks away from the outer shell and the opposite side of the two sets of second connecting blocks. When the two sets of second connecting blocks abut, a positioning hole is formed through the two sets of semi-circular grooves. The set screw, spring, and positioning pin are arranged sequentially from right to left on the inner wall of the locking block. The end of the positioning pin away from the spring penetrates the inner wall of the locking block and extends into the connecting groove. When the locking block is connected to the two sets of second connecting blocks, the end of the positioning pin extending into the connecting groove is engaged with the inner wall of the positioning hole.

[0013] When the magnetic core needs to be replaced, the locking block can be pulled with one hand to release the horizontal latch and the longitudinal positioning pin, allowing the upper housing to be rotated around the pivot pin and unfolded, completely replacing the traditional bolt fixing method and achieving quick disassembly and assembly.

[0014] To enhance the heat dissipation capability of the magnetic core assembly, preferably, the heat dissipation layer includes a PCM phase change layer and two sets of thermally conductive layers. The PCM phase change layer is disposed between the outer wall of the magnetic core assembly and the inner sidewall of the outer shell. The two sets of thermally conductive layers are respectively disposed at both ends of the PCM phase change layer and are both located between the outer wall of the magnetic core assembly and the inner sidewall of the outer shell. The thermally conductive layer is graphene with a nano-alumina coating on its surface, and the PCM phase change layer is a paraffin-polymer composite material encapsulated in microcapsules.

[0015] When the magnetic core assembly is working, the graphene thermal conductive layer accelerates the conduction of heat to the outer shell. By setting a PCM phase change layer of wax-polymer composite material, it is possible to absorb heat through melting when the heat is generated abnormally quickly, thus solving the problem of high temperature accumulation in a single heat dissipation layer.

[0016] To counteract the structural stress caused by thermal expansion, preferably, a flexible silicone layer is provided between the outer wall of the heat dissipation layer and the inner wall of the outer shell to prevent damage caused by thermal expansion.

[0017] When the whole structure expands due to heat, the flexible silicone layer absorbs thermal stress through elastic deformation, preventing interface cracking between the rigid shell and the heat dissipation layer caused by deformation differences.

[0018] To improve the insulation and explosion-proof performance of the outer shell, preferably, the upper and lower shells are made of anodized aluminum alloy and coated with an epoxy resin insulation layer.

[0019] When the casing is exposed to high humidity or electric arc environments, the epoxy resin insulation layer forms a continuous barrier, and the anodized aluminum alloy casing combines lightweight and flame-retardant properties, reducing the risk of burnout.

[0020] To facilitate one-handed operation of the locking block for unlocking, preferably, the rear end of the locking block is provided with a pull ring for easy pulling of the locking block.

[0021] When the operator's finger engages the pull ring and applies force outward, the spring force and the friction of the locking block can be overcome simultaneously, quickly separating the locking block from the second connecting block.

[0022] For ease of installation, preferably, the base has mounting holes at all four corners when viewed from above.

[0023] This invention provides a magnetic core transformer with a convenient core replacement feature. It offers the following advantages:

[0024] 1. Compared with the prior art, this magnetic core transformer with easy magnetic core replacement uses the matching design of the limiting block and the circumferentially distributed limiting groove between the base groove and the connecting seat to enable the connecting seat to be positioned at multiple preset angles. This breaks through the limitation of the fixed and unadjustable axial direction and installation position of the magnetic core assembly in the prior art, and realizes the adaptive adjustment of the magnetic core with the angle of the mounting base surface. It is especially suitable for complex scenarios with narrow spaces or non-horizontal base surfaces.

[0025] 2. Compared with existing technologies, this magnetic core transformer with easy core replacement adopts a hinged upper and lower housing with quick locking structure to replace the traditional bolt fixing method. Through the dual positioning and locking mechanism of horizontal and vertical, the opening and closing of the upper and lower housings can be completed by one hand, which greatly shortens the disassembly and assembly time for core replacement or maintenance and effectively solves the problem of cumbersome disassembly in existing technologies.

[0026] 3. Compared with existing technologies, this magnetic core transformer with easy core replacement, through the synergistic design of graphene thermal conductive layer, phase change heat storage layer and flexible buffer layer, enhances heat conduction and absorption capacity, while using flexible materials to offset thermal expansion stress, taking into account both heat dissipation efficiency and structural reliability, and overcoming the technical defects of single heat dissipation layer design that easily leads to high temperature accumulation and material deformation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a top view of the lower shell of the present invention;

[0029] Figure 3 This is a partial cross-sectional view of the connection structure of the upper shell, lower shell, and two sets of second connecting blocks of the present invention;

[0030] Figure 4This is a schematic cross-sectional view of the locking block of the present invention;

[0031] Figure 5 This is a partial cross-sectional view of the base, connecting seat, and elastic layer connection structure of the present invention;

[0032] Figure 6 This is a bottom view of the connection structure of the connecting seat and the limiting block of the present invention;

[0033] Figure 7 This is a top-view schematic diagram of the base structure of the present invention.

[0034] The components are as follows: 1. Base; 2. Elastic layer; 3. Mounting hole; 4. Support column; 5. Lower shell; 6. Upper shell; 7. First connecting block; 8. Second connecting block; 9. Locking block; 10. Pull ring; 11. Set screw; 12. Inner protective plate; 13. Magnetic core assembly; 14. Heat-conducting layer; 15. PCM phase change layer; 16. Semi-circular groove; 17. Slot; 18. Connecting groove; 19. Locking block; 20. Spring; 21. Positioning pin; 22. Connecting seat; 23. Limiting block; 24. Recessed groove; 25. Limiting groove. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example:

[0037] like Figures 1 to 7 As shown, this embodiment of the invention provides a magnetic core transformer with a convenient magnetic core replacement, including a base 1. The base 1 has mounting holes 3 at the four corners for easy installation when viewed from above, and an elastic layer 2 is provided at the bottom of the base 1.

[0038] To enable multi-angle installation and adjustment of the magnetic core assembly 13, a recessed groove 24 is provided inside the base 1, which is connected to the bottom of the base 1. A connecting seat 22 is slidably connected to the inner wall of the recessed groove 24. A limiting structure for restricting the circumferential rotation of the connecting seat 22 is provided between the connecting seat 22 and the recessed groove 24. The limiting structure includes multiple sets of limiting grooves 25 and a set of limiting blocks 23. The limiting blocks 23 are fixedly connected to the outer circumferential wall of the connecting seat 22. The multiple sets of limiting grooves 25 are all provided on the inner wall of the recessed groove 24. The multiple sets of limiting grooves 25 are evenly distributed in a circle with the axis of the recessed groove 24 as the center. When the connecting seat 22 and the recessed groove 24 are slidably connected, the limiting block 23 is slidably connected to the inner wall of any one of the multiple sets of limiting grooves 25.

[0039] When it is necessary to adjust the installation angle of the magnetic core assembly 13, the connecting seat 22 is removed from under the groove 24 and positioned by connecting the limiting block 23 with different limiting grooves 25, so that the magnetic core axis is adaptively aligned with the mounting base surface, thus solving the problem of narrow space adaptability caused by the non-adjustable fixed magnetic core in the prior art.

[0040] To ensure that the elastic layer 2 provides stable deformation compensation under pressure, the height of the connecting seat 22 is greater than the height of the sink 24 and the height difference is equal to the theoretical deformation of the elastic layer 2 after compression.

[0041] With the above structure, when the base 1 is affected by uneven mounting surface or vibration, the compression deformation of the elastic layer 2 can be buffered, while ensuring that the base 1 can press the connecting seat 22 tightly.

[0042] To optimize the ease of opening and closing the outer shell, a support column 4 is fixedly connected to the upper wall of the connecting base 22. The upper end of the support column 4 passes through the upper wall of the base 1 and is fixedly connected to the outer shell. The outer shell consists of an upper shell 6 and a lower shell 5 that are distributed vertically. A first connecting block 7 is provided on the left side of both the upper shell 6 and the lower shell 5. The two sets of first connecting blocks 7 are rotatably connected by a pivot pin. A second connecting block 8 is provided on the right side of both the upper shell 6 and the lower shell 5. A locking block 9 is slidably connected to the outer wall of the two sets of second connecting blocks 8 on the side away from the outer shell. A connecting groove 18 is provided on the side of the locking block 9 facing the outer shell. A first positioning structure is provided between the locking block 9 and the two sets of second connecting blocks 8 to prevent the locking block 9 from shifting in the left and right directions. A second positioning structure is provided between the locking block 9 and the two sets of second connecting blocks 8 to prevent the locking block 9 from shifting in the front and back directions. The first positioning structure includes two sets of slots 17 and two sets of blocks 19. The two sets of slots 17 are respectively provided on the two sets of second connecting blocks 19. On the opposite side of block 8, two sets of locking blocks 19 are respectively set on the upper inner wall and the lower inner wall of the connecting groove 18. After the two sets of second connecting blocks 8 abut, they slide together with the inner wall of the connecting groove 18. When connected, the two sets of locking blocks 19 slide with the inner wall of a set of locking grooves 17 respectively. The second positioning structure includes a positioning pin 21, a spring 20, a set screw 11 and two sets of semi-circular grooves 16. The two sets of semi-circular grooves 16 are respectively set on the side of a set of second connecting blocks 8 away from the outer shell and at the intersection of the opposite side of the two sets of second connecting blocks 8. When the two sets of second connecting blocks 8 abut, positioning holes are formed through the two sets of semi-circular grooves 16. The set screw 11, spring 20 and positioning pin 21 are arranged in order from right to left on the inner wall of the locking block 9. The end of the positioning pin 21 away from the spring 20 passes through the inner wall of the locking block 9 and extends into the interior of the connecting groove 18. When the locking block 9 is connected with the two sets of second connecting blocks 8, the end of the positioning pin 21 that extends into the interior of the connecting groove 18 is locked with the inner wall of the positioning hole.

[0043] When the magnetic core needs to be replaced, the locking block 9 can be pulled with one hand to release the horizontal latch and the longitudinal positioning pin 21. The upper housing 6 can be rotated around the pivot pin to unfold. During installation, after closing the upper housing 6 and the lower housing 5, the locking block 9 is inserted from the rear of the two sets of second connecting blocks 8 by hand. The locking block 9 and the second connecting block 8 are locked in the left and right direction by the slot 17 and the locking block 19. The locking block 9 and the second connecting block 8 are locked in the front and back direction by the positioning pin 21 popping into the positioning hole. This completely replaces the traditional bolt fixing method and realizes quick disassembly and assembly.

[0044] To facilitate one-handed operation of the locking block 9, a pull ring 10 is provided at the rear end of the locking block 9 for easy pulling.

[0045] When the operator's finger engages the pull ring 10 and applies force outward, it can simultaneously overcome the elastic force of the spring 20 and the frictional force of the locking block 19, quickly separating the locking block 9 from the second connecting block 8.

[0046] To enhance the heat dissipation capacity of the magnetic core assembly 13, the magnetic core assembly 13 and the inner protective plate 12 are sequentially arranged from the outside to the inside of the inner sidewall of the outer shell. A heat dissipation layer for improving heat dissipation is provided between the outer wall of the magnetic core assembly 13 and the inner sidewall of the outer shell. The heat dissipation layer includes a PCM phase change layer 15 and two sets of thermally conductive layers 14. The PCM phase change layer 15 is disposed between the outer wall of the magnetic core assembly 13 and the inner sidewall of the outer shell. The two sets of thermally conductive layers 14 are respectively disposed at both ends of the axial direction of the PCM phase change layer 15 and are both located between the outer wall of the magnetic core assembly 13 and the inner sidewall of the outer shell. The thermally conductive layer 14 is graphene with a nano-alumina coating on its surface, and the PCM phase change layer 15 is a paraffin-polymer composite material encapsulated in microcapsules.

[0047] When the magnetic core assembly 13 is working, the graphene thermal conductive layer 14 accelerates the conduction of heat to the outer shell. By setting the PCM phase change layer 15 of wax-polymer composite material, it can absorb heat through melting when the heat is generated abnormally quickly, thus solving the problem of high temperature accumulation in a single heat dissipation layer.

[0048] To counteract the structural stress caused by thermal expansion, a flexible silicone layer 26 is provided between the outer wall of the heat dissipation layer and the inner wall of the outer shell to prevent damage caused by thermal expansion.

[0049] When the whole body expands due to heat, the flexible silicone layer 26 absorbs thermal stress through elastic deformation, avoiding interface cracking between the rigid shell and the heat dissipation layer due to deformation differences.

[0050] To improve the insulation and explosion-proof performance of the outer shell, the upper shell 6 and the lower shell 5 are made of anodized aluminum alloy and coated with an epoxy resin insulation layer.

[0051] When the casing is exposed to high humidity or electric arc environments, the epoxy resin insulation layer forms a continuous barrier, and the anodized aluminum alloy casing combines lightweight and flame-retardant properties, reducing the risk of burnout.

[0052] Working principle: When the installation angle of the magnetic core assembly 13 needs to be adjusted, the connecting seat 22 is removed from under the groove 24 and positioned by the limiting block 23 and different limiting grooves 25, so that the magnetic core axis is adaptively aligned with the mounting base surface, solving the problem of adaptability in narrow spaces caused by the non-adjustable magnetic core fixation in the prior art; when the base 1 is affected by uneven mounting base surface or vibration, the compression deformation of the elastic layer 2 can buffer it, while ensuring that the base 1 can press the connecting seat 22 tightly; when the magnetic core needs to be replaced, the locking block 9 can be pulled with one hand to release the horizontal locking and the longitudinal positioning pin 21 locking, and the upper housing 6 can be rotated and unfolded around the pivot pin, completely replacing the traditional bolt fixing method and realizing quick disassembly and assembly; when the operator's fingers are inserted into the pull ring 10 and towards When external force is applied, the elastic force of spring 20 and the friction of locking block 19 can be overcome simultaneously, and locking block 9 and second connecting block 8 can be quickly separated. When the magnetic core assembly 13 is working, graphene thermal conductive layer 14 accelerates the conduction of heat to the outer shell. By setting the PCM phase change layer 15 of wax-polymer composite material, it can absorb heat through melting when it heats up abnormally quickly, thus solving the problem of high temperature accumulation in a single heat dissipation layer. When the whole body expands due to heat, flexible silicone layer 26 absorbs thermal stress through elastic deformation, avoiding interface cracking between rigid outer shell and heat dissipation layer due to deformation difference. When the outer shell is exposed to high humidity or electric arc environment, epoxy resin insulation layer forms a continuous barrier. Anodized aluminum alloy shell has both lightweight and flame-retardant properties, reducing the risk of burning.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magnetic core transformer with a convenient magnetic core replacement feature, characterized in that: The system includes a base (1), with an elastic layer (2) at the bottom. A recess (24) penetrating the bottom of the base (1) is provided inside the base (1). A connecting seat (22) is slidably connected to the inner wall of the recess (24). A limiting structure for restricting the circumferential rotation of the connecting seat (22) is provided between the connecting seat (22) and the recess (24). A support column (4) is fixedly connected to the upper wall of the connecting seat (22). The upper end of the support column (4) penetrates the upper wall of the base (1) and is fixedly connected to a shell. The shell consists of an upper shell (6) and a lower shell (5) that are vertically distributed and can be opened and closed. A first connecting block (7) is provided on the left side of both the upper shell (6) and the lower shell (5). The two sets of first connecting blocks (7) are rotatably connected by a pivot pin. The upper shell (6) and the lower shell (5) are each provided with a second connecting block (8) on the right side. The two sets of second connecting blocks (8) are slidably connected to a locking block (9) on the outer wall away from the shell. The locking block (9) is provided with a connecting groove (18) on the side facing the shell. A first positioning structure is provided between the locking block (9) and the two sets of second connecting blocks (8) to prevent the locking block (9) from shifting in the left and right directions. A second positioning structure is provided between the locking block (9) and the two sets of second connecting blocks (8) to prevent the locking block (9) from shifting in the front and back directions. The inner sidewall of the shell is provided with a magnetic core assembly (13) and an inner protective plate (12) from the outside to the inside. A heat dissipation layer is provided between the outer wall of the magnetic core assembly (13) and the inner sidewall of the shell to improve the heat dissipation effect.

2. A magnetic core transformer with a convenient magnetic core replacement according to claim 1, characterized in that: The limiting structure includes multiple sets of limiting grooves (25) and a set of limiting blocks (23). The limiting blocks (23) are fixedly connected to the outer circumferential wall of the connecting seat (22). The multiple sets of limiting grooves (25) are all set on the inner sidewall of the sink (24). The multiple sets of limiting grooves (25) are evenly distributed in a circle with the sink (24) axis as the center. When the connecting seat (22) is slidably connected to the sink (24), the limiting blocks (23) are slidably connected to the inner sidewall of any one of the multiple sets of limiting grooves (25).

3. A magnetic core transformer with a convenient magnetic core replacement according to claim 2, characterized in that: The height of the connecting seat (22) is greater than the height of the sink (24), and the height difference is equal to the theoretical deformation of the elastic layer (2) after compression.

4. A magnetic core transformer with a convenient magnetic core replacement according to claim 3, characterized in that: The first positioning structure includes two sets of slots (17) and two sets of blocks (19). The two sets of slots (17) are respectively located on opposite sides of the two sets of second connecting blocks (8). The two sets of blocks (19) are respectively located on the upper inner wall and the lower inner wall of the connecting groove (18). After the two sets of second connecting blocks (8) abut against each other, they slide together with the inner wall of the connecting groove (18). When connected, the two sets of blocks (19) slide together with the inner wall of one set of slots (17).

5. A magnetic core transformer with a convenient magnetic core replacement according to claim 4, characterized in that: The second positioning structure includes a positioning pin (21), a spring (20), a set screw (11), and two sets of semi-circular grooves (16). The two sets of semi-circular grooves (16) are respectively located at the junction of the side of the second connecting block (8) away from the outer shell and the opposite side of the two sets of second connecting blocks (8). When the two sets of second connecting blocks (8) abut, they form positioning holes through the two sets of semi-circular grooves (16). The set screw (11), spring (20), and positioning pin (21) are arranged in order from right to left on the inner wall of the locking block (9). The end of the positioning pin (21) away from the spring (20) passes through the inner wall of the locking block (9) and extends into the connecting groove (18). When the locking block (9) is connected to the two sets of second connecting blocks (8), the end of the positioning pin (21) extending into the connecting groove (18) is engaged with the inner wall of the positioning hole.

6. A magnetic core transformer with a convenient magnetic core replacement according to claim 5, characterized in that: The heat dissipation layer includes a PCM phase change layer (15) and two sets of heat-conducting layers (14). The PCM phase change layer (15) is disposed between the outer wall of the magnetic core assembly (13) and the inner wall of the outer shell. The two sets of heat-conducting layers (14) are respectively disposed at both ends of the PCM phase change layer (15) and are both located between the outer wall of the magnetic core assembly (13) and the inner wall of the outer shell. The heat-conducting layer (14) is graphene with a nano-alumina coating on its surface, and the PCM phase change layer (15) is a paraffin-polymer composite material encapsulated in microcapsules.

7. A magnetic core transformer with a convenient magnetic core replacement according to claim 6, characterized in that: A flexible silicone layer (26) is provided between the outer wall of the heat dissipation layer and the inner wall of the outer shell to prevent damage caused by thermal expansion.

8. A magnetic core transformer with a convenient magnetic core replacement according to claim 7, characterized in that: The upper housing (6) and the lower housing (5) are made of anodized aluminum alloy and are coated with an epoxy resin insulating layer.

9. A magnetic core transformer with a convenient magnetic core replacement according to claim 8, characterized in that: The rear end of the locking block (9) is provided with a pull ring (10) for easy pulling of the locking block (9).

10. A magnetic core transformer with a convenient magnetic core replacement according to claim 9, characterized in that: The base (1) has mounting holes (3) at all four corners when viewed from above for easy installation.

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