Combined shell structure for mutual inductor

Abstract

The utility model discloses a combined shell structure of a mutual inductor. The combined shell structure comprises a cover shell and an assembly shell which are independently formed, the assembly shell is composed of an inner shell and an outer shell, the inner shell is provided with an assembly iron core and winding structure, and the outer shell is composed of an assembly bottom shell and a face shell. The assembly bottom shell is composed of two semi-annular sub-shells, and the sub-shells are assembled into an annular structural body through a hinge piece and a fixed connection assembly structure. The face shell is made of heat dissipation materials and can cover and close the open face of the annular structural body. An assembling cavity matched with the annular structural body is formed in the bottom face of the assembling shell, inserting structures are arranged on the side faces of the sub-shell and the assembling cavity, and the assembled assembling shell can be inserted into the assembling cavity. The transformer has the advantages of being simple in structure, easy to manufacture and assemble, excellent in heat dissipation performance, high in stability, safe, reliable and the like, and is suitable for a transformer structure under high voltage or large current.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, in particular to a combined shell structure for mutual inductors. Background Art

[0002] In power supply lines, the current and voltage are relatively high. Direct measurement is very dangerous. Therefore, mutual inductors are generally used. Mutual inductors, also known as instrument transformers, are a general term for current transformers and voltage transformers. Their main function is to convert high voltage or large current into standard low voltage or standard small current in proportion, so as to achieve standardized and miniaturized settings of measuring instruments, protection equipment and automatic control equipment. At the same time, mutual inductors can also be used to isolate high voltage systems to ensure the safety of people and equipment.

[0003] The transformer is generally provided with an outer shell to play an isolation and structural protection role, which helps to isolate the circuit, prevent dust and other debris from contaminating the components and protect them from mechanical damage. The shell of the transformer in the prior art usually includes two molding structures: integral and assembled. The integral transformer shell structure is relatively complex, the injection molding process is relatively difficult, the production cost is high and the scrap rate is high; while the assembled transformer shell structure will be provided with a semi-circular split inner shell inside the shell for the semi-circular iron core to be placed. It mainly focuses on the improvement of assembly performance, and has certain defects in heat dissipation and protection. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a combined housing structure for a mutual inductor, which can be used 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 combined housing structure for a mutual inductor, comprising an independently formed cover shell and an assembled housing;

[0007] The assembly shell comprises an inner shell and an outer shell, and an assembly structure for assembling the iron core and the winding is formed on the inner shell; the outer shell is a combined shell, comprising an assembly bottom shell and a surface shell, and the assembly bottom shell comprises two semi-annular sub-shells, the surface of the sub-shells is an open surface, and has a volume cavity that can accommodate the inner shell; the two sub-shells are arranged opposite to each other, a hinge is arranged on the top surface, and a fixed assembly structure is arranged on the bottom surface, and the two sub-shells can be assembled into an annular structure through the hinge and the fixed assembly structure; the surface shell is formed of a heat dissipation material, matches the annular structure, and can cover and seal the corresponding open surface of the sub-shell on the annular structure;

[0008] The assembly shell is provided with an assembly cavity matching the annular structure on the bottom surface; the sub-shell and the assembly cavity are provided with matching plug-in structures on the opposite sides, and the assembled assembly shell can be inserted into the assembly cavity of the assembly shell as a whole through the plug-in structure.

[0009] As a further limitation, the cover shell is a cast iron shell or an aluminum alloy shell.

[0010] As a further limitation, an antistatic coating is applied on the inner surface of the shell of the cover.

[0011] As a further limitation, the assembly bottom shell in the housing is an injection-molded structural component formed of a plastic material; and the surface shell is a die-casting component formed of an aluminum alloy material or a sintered structural component formed of a ceramic material.

[0012] As a further limitation, the plug-in structure is a combination of an inserting portion and an inserting slot, the inserting portion is formed on the outer sides of the sub-shell, and the inserting slot is formed on the inner sides of the assembly cavity and is arranged opposite to the inserting portion.

[0013] As a further limitation, the covering surface of the face shell on the side corresponding to the assembly bottom shell is smooth, and a plurality of parallel convex ribs are formed on the surface of the corresponding side of the cover shell; the cover shell is formed with grooves matching the convex ribs on the corresponding surface of the assembly cavity, and the depth of the groove is less than the height of the convex ribs.

[0014] As a further limitation, a heat dissipation air window is provided on the assembly shell, and a thermal conductive patch is formed on the inner surface of one side of the corresponding surface shell.

[0015] As a further limitation, the fixed assembly structure is a combination of a buckle structure, a clamping structure, a plug-in structure and a threaded fastener.

[0016] As a further limitation, the assembly structure arranged on the inner shell includes a placement groove and a winding portion, the placement groove is formed on the surface of the inner shell, the outline size matches the semi-annular iron core, and has a U-shaped cross-section; the winding portion is formed on the outer contour of the inner shell and is used to form the coil winding.

[0017] As a further limitation, the substrate of the thermally conductive patch is a high thermally conductive insulating sheet, which is attached to the inner surface of the assembly shell through thermally conductive silicone.

[0018] Beneficial effect: The combined shell structure for the transformer of the utility model is composed of an independently formed cover shell and an assembly shell. This design not only reduces the manufacturing difficulty and production cost, but also makes the structural combination of the transformer shell more flexible. At the same time, the overall stability of the transformer shell is enhanced through the interlocking between the multiple assembly structures of the cover shell and the assembly shell.

[0019] The split structure of the assembly shell can effectively simplify the assembly process and improve the assembly efficiency. In addition, this design is also convenient for the assembly and disassembly of the inner shell, which provides convenience for maintenance and parts replacement.

[0020] The combination of the heat dissipation structure on the face shell and the assembly shell, together with the setting of the thermal conductive patch, effectively improves the heat dissipation effect and ensures the stable operation of the transformer in a high temperature environment; therefore, it is particularly suitable for use in a transformer structure under high voltage or high current. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the assembly of a preferred embodiment of the utility model.

[0022] Among them: 1. hinged seat; 2. cover shell; 3. sub-shell; 4. upper limit stopper; 5. inner shell; 6. surface shell; 7. lower limit liner; 8. threaded assembly hole; 9. sealing rubber pad; 10. cover shell base; 11. fixing buckle; 12. buckle base; 13. fastening bolts. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments. The described embodiments are only part of the embodiments of the present invention, not all of them.

[0024] See also Figure 1 A preferred embodiment of a combined shell structure for a transformer is provided. In this embodiment, the combined shell structure for a transformer mainly includes an independently formed cover shell and an assembly shell, wherein the cover shell matches the assembly shell and is used in combination; the outer contour of the cover shell can be designed according to actual needs to meet specific usage environment and functional requirements.

[0025] The assembled shell of this embodiment is the main body of the combined shell structure, which includes an independently formed inner shell 5 and an outer shell.

[0026] The inner shell 5 is used in pairs to provide space and structural support for assembling the iron core and the winding. Specifically, the inner shell 5 in this embodiment is a semi-annular structure, and its ring section is U-shaped. The outline size of its U-shaped cavity matches the semi-annular iron core. The inner shell 5 uses the U-shaped cavity as the assembly space of the semi-annular iron core, and the outer contour surface of the inner shell 5 is used to form the coil winding, so that the corresponding transformer winding can be directly wound on the outer peripheral surface of the semi-annular inner shell 5.

[0027] The outer shell is a combined shell structure, including an assembly bottom shell and a surface shell 6. The assembly bottom shell can be an injection-molded structural part formed of plastic material in consideration of structural cost and molding difficulty; the assembly bottom shell includes two semi-annular sub-shells 3, the surfaces of the two sub-shells 3 are open surfaces, and have a volume cavity that can accommodate the inner shell 5. During the assembly process, the inner shell 5 with the semi-annular core and winding assembled can be directly assembled in the volume cavity. The two sub-shells 3 are provided with an articulated seat 1 at the top, and the articulated seat 1 is an assembled articulated seat. Through the assembled structure of the articulated seat 1, the two sub-shells 3 can be separated and independently assembled with the inner shell 5, and connected and combined on the articulated seat 1 after assembly; the two sub-shells 3 are provided with a buckle base 12 on the opposite surfaces of the bottom, and a matching fixing buckle 11 is provided on the buckle base 12. The combination of the articulated seat 1 and the fixing buckle 11 enables the two sub-shells 3 to be assembled into an annular structure as shown in the figure and pre-fixed in position in this state; at the same time, a matching threaded assembly hole is also provided on the bottom surface of the fixing buckle 11, so that the two sub-shells 3 can be fixed in position after buckling and pre-fixing at the position of the threaded assembly hole using a threaded fastener. The surface shell 6 is a plate structure formed of a heat dissipation material. In the preferred embodiment, the heat dissipation material can be a die-casting formed of an aluminum alloy or a sintered structure of a ceramic material. In the present embodiment, the heat dissipation material is an aluminum alloy plate having both sufficient structural strength and good heat dissipation performance. The size profile of the surface shell 6 matches the annular structure formed by the combination of the two sub-shells 3, so that the surface shell 6 can cover and seal the open surface of the corresponding sub-shell 3 on the annular structure.

[0028] In another embodiment, in order to further improve the heat dissipation effect, the cover surface of the surface shell 6 can also be set to a smooth surface on the covering surface corresponding to the side of the assembled bottom shell, and the coil winding serving as the heating element can be abutted against the smooth surface; and a plurality of parallel ribs are formed on the surface corresponding to the side of the cover shell 2, and the cover shell 2 has grooves matching the ribs formed on the inner side surface corresponding to the assembly cavity, and the depth of the groove is less than the height of the rib, so that a heat dissipation air flow channel can be separated by the grooves and ribs on the contact surface of the two; in this case, it is only necessary to set a heat dissipation air window on the cover shell 2, and the heat transfer efficiency can be improved by cooperating with the heat dissipation air window through the combined structure of the ribs and the grooves, thereby further optimizing the heat dissipation performance of the mutual inductor.

[0029] At this point, the transformer has completed the assembly of the main functional structure, and the assembly shell is used as an external protective structure, which is directly covered on the outside of the assembled assembly shell. The assembly shell includes a detachable cover shell 2 and a cover shell base 10, wherein the bottom surface of the cover shell 2 is open, and an assembly cavity matching the assembly shell is provided on the inner side of the opening surface, and the sub-shell 3 and the assembly cavity are provided with matching plug-in structures on the opposite sides, and the assembled assembly shell can be inserted into the assembly cavity of the cover shell 2 as a whole through the guiding effect of the plug-in structure. The cover shell base 10 is used to close the open bottom surface of the cover shell 2 at the open side of the cover shell 2; the design of this plug-in structure makes the assembly and disassembly of the assembly shell simpler and more convenient.

[0030] The cover shell 2 is formed with a heat conductive patch on the inner surface of the side corresponding to the face shell 6, and the face shell 6 in the assembled shell in the assembled state is kept in contact with the cover shell 2 for contact heat dissipation.

[0031] In addition, upper limit stops 4 are relatively set on both sides of the assembly cavity of the cover shell 2, and a lower limit pad 7 is formed on the surface of the cover shell base 10. The shapes and setting positions of the upper limit stop 4 and the lower limit pad 7 match the upper and lower outer contours of the sub-shell 3. The upper limit stop 4 is used to directly clamp and limit the top surface when the assembly shell is installed, and the lower limit pad 7 has a threaded assembly hole 8, which can be used to close the bottom surface of the cover base 10 by pressing on the surface and screwing the fastening bolts 13 into the assembly holes reserved at the position of the threaded assembly holes 8 on the outer side of the bottom of the cover shell 2 to achieve bottom surface limitation after the assembly shell is installed.

[0032] In different embodiments, the housing shell 2 can be a cast iron shell or an aluminum alloy shell. The metal shell of the transformer not only has better mechanical strength and impact resistance, but also can effectively isolate external interference and ensure the stable operation of the transformer. At the same time, the metal shell also has better heat dissipation performance, which can effectively reduce the heat generated by the transformer during operation and ensure the long-term stable operation of the transformer; when the housing shell 2 adopts a cast iron shell, it focuses on the physical impact protection of the transformer, while when the aluminum alloy shell is adopted, it focuses on the heat dissipation performance of the transformer.

[0033] In addition, an antistatic coating is applied on the inner surface of the housing shell 2 to prevent static electricity from affecting the mutual inductor.

[0034] In summary, the combined housing structure for the transformer of this embodiment realizes flexible combination and efficient heat dissipation of the transformer housing by combining the independently formed cover shell and the assembly housing. In addition, this structure can reduce the difficulty of structural manufacturing to control production costs while ensuring the performance and reliability of the transformer, and is particularly suitable for use in transformer structures under high voltage or high current.

[0035] 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 utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A combined housing structure for a mutual inductor, characterized in that: It includes an independently formed cover shell and an assembled shell; The assembly shell comprises an inner shell and an outer shell, and an assembly structure for assembling the iron core and the winding is formed on the inner shell; the outer shell is a combined shell, comprising an assembly bottom shell and a surface shell, and the assembly bottom shell comprises two semi-annular sub-shells, the surface of the sub-shells is an open surface, and has a volume cavity that can accommodate the inner shell; the two sub-shells are arranged opposite to each other, a hinge is arranged on the top surface, and a fixed assembly structure is arranged on the bottom surface, and the two sub-shells can be assembled into an annular structure through the hinge and the fixed assembly structure; the surface shell is formed of a heat dissipation material, matches the annular structure, and can cover and seal the corresponding open surface of the sub-shell on the annular structure; The assembly shell is provided with an assembly cavity matching the annular structure on the bottom surface; the sub-shell and the assembly cavity are provided with matching plug-in structures on the opposite sides, and the assembled assembly shell can be inserted into the assembly cavity of the assembly shell as a whole through the plug-in structure.

2. The combined housing structure for a mutual inductor according to claim 1, characterized in that: The cover shell is a cast iron shell or an aluminum alloy shell.

3. The combined housing structure for a mutual inductor according to claim 1, characterized in that: The inner surface of the shell of the cover is coated with an antistatic coating.

4. The combined housing structure for a mutual inductor according to claim 1, characterized in that: The assembly bottom shell in the housing is an injection-molded structural component formed of a plastic material; and the surface shell is a die-casting component formed of an aluminum alloy material or a sintered structural component of a ceramic material.

5. The combined housing structure for a mutual inductor according to claim 1, characterized in that: The plug-in structure is a combination of an inserting portion and an inserting slot. The inserting portion is formed on the outer sides of the sub-shell, and the inserting slot is formed on the inner sides of the assembly cavity and is arranged opposite to the inserting portion.

6. The combined housing structure for a mutual inductor according to claim 1, characterized in that: The covering surface of the face shell on the side corresponding to the assembly bottom shell is smooth, and a plurality of parallel convex ribs are formed on the surface of the corresponding side of the cover shell; the cover shell is formed with grooves matching the convex ribs on the corresponding surface of the assembly cavity, and the depth of the groove is less than the height of the convex ribs.

7. The combined housing structure for a mutual inductor according to claim 1, characterized in that: The assembly shell is provided with a heat dissipation air window, and a heat conductive patch is formed on the inner surface of one side of the corresponding surface shell.

8. The combined housing structure for a mutual inductor according to claim 1, characterized in that: The fixed assembly structure is a combination of a buckle structure, a clamping structure, a plug-in structure and a threaded fastener.

9. The combined housing structure for a mutual inductor according to claim 1, characterized in that: The assembly structure arranged on the inner shell includes a placement groove and a winding portion. The placement groove is formed on the surface of the inner shell, the outline size matches the semi-annular iron core, and has a U-shaped cross-section; the winding portion is formed on the outer contour of the inner shell and is used to form the coil winding.

10. The combined housing structure for a mutual inductor according to claim 7, characterized in that: The base material of the thermal conductive patch is a high thermal conductive insulating sheet, which is attached to the inner surface of the assembly shell through thermal conductive silica gel.

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