A type of iron core shielding support cover

Abstract

A core shielding support cover includes an insulating base plate, an outer cover assembly, a top cover, and connecting components. The insulating base plate includes an insulating base plate body, a positioning groove, and a connecting through hole. The outer cover assembly includes a first outer cover unit, a second outer cover unit, and a connecting ring. Both the first and second outer cover units include an outer cover. Each outer cover includes an outer cover body, an outer cover limiting groove, an outer cover limiting protrusion, a mounting bracket, and a positioning groove. The top cover includes a top cover body, a top cover mounting groove, and a top cover mounting bracket. The top cover mounting bracket includes a top cover mounting bracket body and a top cover connecting through hole. Each connecting component includes an insulating screw and an insulating nut. This core shielding support cover achieves a compact, fully enclosed structure for insulation shielding, is easy to install, and can serve as an external structural support component for the core while also forming a shielding layer between the core and the coil.

Description

Technical Field

[0001] This utility model belongs to the technical field of valve reactor equipment, and in particular, it is a core shielding support cover. Background Technology

[0002] Valve reactors are key components in the converter valve devices of high-voltage direct current transmission systems, used to protect thyristors. Their purpose is to limit the high rates of current rise (di / dt) and voltage rise (du / dt) generated in the electrical circuit during the switching process of semiconductor thyristors. Thus, valve reactors provide a reliable and efficient protection component for the thyristor's commutation operation.

[0003] Traditional valve reactors mostly employ hollow or linear iron core structures, but these suffer from drawbacks such as large size, high losses, and poor saturation characteristics, making it difficult to meet the compact and efficient requirements of ultra-high voltage and large-capacity power transmission. To address this issue, iron-core saturated valve reactors have emerged. By optimizing the iron core magnetic circuit design to achieve nonlinear saturation characteristics, they significantly reduce size and losses, and have become the mainstream configuration for next-generation converter valves. However, the iron core structure also brings new technical challenges: on the one hand, the iron core accounts for more than 60% of the reactor's volume / mass, making it prone to mechanical vibration (frequency oscillation) under alternating electromagnetic fields. Long-term operation may lead to structural loosening. Balancing the electromagnetic-thermal-mechanical multi-physics coupling stability of the iron core with high insulation reliability has become a technical bottleneck restricting the long-term safe operation of iron-core saturated valve reactors. Utility Model Content

[0004] In view of this, the present invention provides a core shielding support cover that can improve the stability of the core structure to meet industrial needs.

[0005] A core shielding support cover includes an insulating base plate, a cover assembly disposed on the insulating base plate, a top cover disposed on the top of the cover assembly, and at least two connecting assemblies disposed between the insulating base plate, the cover assembly, and the top cover. The insulating base plate includes an insulating base plate body, a positioning groove disposed on the insulating base plate body, and two symmetrically arranged connecting through holes disposed on the insulating base plate body. The cover assembly includes a first cover unit disposed on the insulating base plate, a second cover unit disposed on one side of the first cover unit, and a connecting ring disposed between the first cover unit and the second cover unit. The first cover unit and the second cover unit have identical structures and are symmetrical to each other. Each of the first cover unit and the second cover unit includes two covers that are interlocked together. Each cover includes a cover body, a cover limiting groove disposed on the inner sidewall edge of the cover body, a cover limiting protrusion disposed on the inner sidewall edge of the cover body, a mounting bracket disposed on the outer sidewall of the cover body, and a positioning groove disposed on the mounting bracket. The top cover includes a top cover body, a top cover mounting groove disposed on one side of the top cover body, and two top cover mounting brackets symmetrically disposed on the side wall of the top cover body. Each top cover mounting bracket includes a top cover mounting bracket body and a top cover connecting through hole disposed on the top cover mounting bracket body. Each connecting component includes an insulating screw and a plurality of insulating nuts disposed on the insulating screw. When the connecting components connect the insulating base plate, the outer cover assembly, and the top cover together, the top cover connecting through hole, the positioning groove, and the connecting through hole correspond to each other. The insulating screw is inserted into the top cover connecting through hole, the positioning groove, and the connecting through hole, and the plurality of insulating nuts on the insulating screw respectively abut against the top cover mounting bracket, the mounting bracket, and the insulating base plate.

[0006] Furthermore, the top cover also includes a lifting ring disposed on the top cover body.

[0007] Furthermore, the top cover body and the top cover mounting bracket are integrally formed.

[0008] Furthermore, the top cover also includes at least one top cover fixing hole disposed on the top cover body.

[0009] Furthermore, the insulating base plate also includes at least one base plate fixing hole disposed on the main body of the insulating base plate.

[0010] Furthermore, the insulating base plate also includes at least one base plate fixing hole disposed on the main body of the insulating base plate.

[0011] Further, the connecting ring comprises a connecting ring main body and outer cover limiting grooves arranged on two sides of the connecting ring main body.

[0012] Further, the outer contour of the outer cover main body is in a "匚" shape.

[0013] Further, each of the outer covers further comprises a shielding inner cover arranged on the outer cover main body, and the outer cover limiting groove and the outer cover limiting protrusion are arranged at the edge of the shielding inner cover.

[0014] Further, when the first outer cover unit and the second outer cover unit are buckled together, the outer contour of the outer cover assembly is in a "□" shape.

[0015] Compared with the prior art, the iron core shielding support cover provided by this utility model covers the outside of the iron core through the insulating base plate, the outer cover assembly, and the top cover, and the connecting assembly connects the insulating base plate, the outer cover assembly, and the top cover into a whole. The outer cover assembly includes a first outer cover unit disposed on the insulating base plate 10, a second outer cover unit disposed on one side of the first outer cover unit, and a connecting ring disposed between the first outer cover unit and the second outer cover unit. The first outer cover unit and the second outer cover unit have the same structure and are symmetrical to each other. The first outer cover unit and the second outer cover unit each include two outer covers that are interlocked together. Each outer cover includes an outer cover body, an outer cover limiting groove disposed on the inner sidewall edge of the outer cover body, an outer cover limiting protrusion disposed on the inner sidewall edge of the outer cover body, a mounting bracket disposed on the outer sidewall of the outer cover body, and a positioning groove disposed on the mounting bracket. The top cover includes a top cover body, a top cover mounting groove disposed on one side of the top cover body, and two top cover mounting brackets symmetrically disposed on the sidewall of the top cover body. Each of the top cover mounting brackets has a top cover connection through hole on its main body. The positioning groove in the insulating base plate and the top cover mounting slot in the top cover respectively accommodate the two ends of the outer cover assembly, ensuring a stable connection between the outer cover assembly, the insulating base plate, and the top cover. When the connecting assembly connects the insulating base plate, the outer cover assembly, and the top cover together, the top cover connection through hole, the positioning slot, and the connection through hole correspond to each other. The insulating screw is inserted into the top cover connection through hole, the positioning slot, and the connection through hole, and multiple insulating nuts on the insulating screw abut against the top cover mounting bracket, the mounting bracket, and the insulating base plate, thereby achieving the outer cover assembly covering and supporting the outside of the iron core. The insulating base plate and the top cover are located at both ends of the iron core. The first outer cover unit and the second outer cover unit in the outer cover assembly cover the outside of the iron core and are provided with insulating shields inside the central hole. The coil is located outside the outer cover assembly. It can be seen that the iron core shielding support cover achieves a compact structure and convenient installation of a fully enclosed structure support type insulating shielding cover. It can serve as an external structural support component for the iron core, and can also form a shielding layer between the iron core and the coil. At the same time, it can effectively isolate the noise when the iron core is working, further shorten the insulation distance, and reduce the size of the reactor. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the iron core shielding support cover provided by this utility model.

[0017] Figure 2 for Figure 1 A cross-sectional structural diagram of the iron core shielding support outer cover.

[0018] Figure 3 for Figure 2A partially enlarged structural diagram of the iron core shielding support cover at point A.

[0019] Figure 4 for Figure 2 A partially enlarged structural diagram of the iron core shielding support cover at point B.

[0020] Figure 5 for Figure 1 A schematic diagram of the structure of the outer cover in the iron core shielding support outer cover.

[0021] Figure 6 for Figure 5 A magnified schematic diagram of the outer casing at point C.

[0022] Figure 7 for Figure 5 A magnified schematic diagram of the outer casing at point D.

[0023] Figure 8 for Figure 1 A schematic diagram of the connecting ring in the outer casing of the iron core shielding support.

[0024] Figure 9 for Figure 1 A schematic diagram of the structure of the top cover in the iron core shielding support outer cover.

[0025] Figure 10 for Figure 1 A schematic diagram of the structure of the insulating base plate in the iron core shielding support outer cover. Detailed Implementation

[0026] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0027] like Figures 1 to 10 The diagram shown is a structural schematic of the iron core shielding support cover provided by this utility model. The iron core shielding support cover includes an insulating base plate 10, an outer cover assembly 20 disposed on the insulating base plate 10, a top cover 30 disposed on the top of the outer cover assembly 20, and at least two connecting assemblies 40 disposed between the insulating base plate 10, the outer cover assembly 20, and the top cover 30. The iron core shielding support cover also includes other functional modules, such as assembly components, etc., which should be known to those skilled in the art and will not be described in detail here.

[0028] The insulating base plate 10 includes an insulating base plate body 11, a positioning groove 12 disposed on the insulating base plate body 11, two symmetrically disposed connecting through holes 13 on the insulating base plate body 11, and at least one base plate fixing hole 14 disposed on the insulating base plate body 11. The positioning groove 12 is used to accommodate the outer cover assembly 20 to stabilize the position of the outer cover assembly 20 installed on the insulating base plate 10, and the connecting through holes 13 are used to connect the connecting assembly 40. The connecting through holes 13 will be described in detail in conjunction with the connecting assembly 40.

[0029] The outer cover assembly 20 includes a first outer cover unit 21 disposed on the insulating base plate 10, a second outer cover unit 22 disposed on one side of the first outer cover unit 21, and a connecting ring 23 disposed between the first outer cover unit 21 and the second outer cover unit 22.

[0030] The first outer cover unit 21 and the second outer cover unit 22 have the same structure and are symmetrical to each other. The first outer cover unit 21 and the second outer cover unit 22 each include two outer covers 211 that are fastened together.

[0031] Each of the outer covers 211 includes an outer cover body 2111, an outer cover limiting groove 2112 disposed on the inner sidewall edge of the outer cover body 2111, an outer cover limiting protrusion 2113 disposed on the inner sidewall edge of the outer cover body 2111, a mounting bracket 2114 disposed on the outer sidewall of the outer cover body 2111, a positioning groove 2115 disposed on the mounting bracket 2114, and a shielding inner cover 2116 disposed on the outer cover body 2111.

[0032] Both the outer cover main body 2111 and the shielding inner cover 2116 are made of insulating materials to realize electrical isolation of the outer cover 211, prevent current from conducting through the outer cover 211, thereby avoiding the risk of short circuit or electric leakage and ensuring the safety and reliability of equipment operation. The outer cover limiting groove 2112 and the outer cover limiting protrusion 2113 are arranged at the edge of the inner side wall of the outer cover main body 2111, and the outer cover limiting groove 2112 and the outer cover limiting protrusion 2113 are also arranged at the edge of the shielding inner cover. When the two outer covers 211 respectively in the first outer cover unit 21 and the second outer cover unit 22 are buckled together, the outer cover limiting groove 2112 on one outer cover 211 corresponds to the outer cover limiting protrusion 2113 on the other outer cover 211, and the outer cover limiting protrusion 2113 on one outer cover 211 corresponds to the outer cover limiting groove 2112 on the other outer cover 211, so that the two outer cover main bodies 2111 and the shielding inner cover 2116 are buckled together. The outer cover 21 wraps the outer side wall of the iron core, the shielding inner cover 2116 wraps the inner side wall of the iron core, and the shapes of the first outer cover unit 21 and the second outer cover unit 22 are consistent with the shape of the iron core, so that the first outer cover unit 21 and the second outer cover unit 22 enclose the iron core inside. The outer contour of the outer cover main body 211 is in a C-shape, and when the first outer cover unit 21 and the second outer cover unit 22 are buckled together, the outer contour of the outer cover assembly 20 is in a square shape.

[0033] The mounting bracket 2114 is configured to cooperate with the connecting assembly 40, and the positioning groove 2115 is arranged at the edge of the mounting bracket 2114, so that the mounting bracket 2114 and the positioning groove 2115 will be described in detail in conjunction with the connecting assembly 40.

[0034] The connecting ring 23 comprises a connecting ring main body 231 and outer cover limiting grooves 232 arranged on both sides of the connecting ring main body 231. The outer contour of the outer cover limiting groove 232 has the same shape as the outer contour of the end edges of the first outer cover unit 21 and the second outer cover unit 22, and the first outer cover unit 21 and the second outer cover unit 22 are integrated into a whole through the connecting ring 23.

[0035] The top cover 30 comprises a top cover main body 31, a top cover mounting groove 32 arranged on one side of the top cover main body 31, two top cover mounting brackets 33 symmetrically arranged on the side wall of the top cover main body 31, a lifting ring 34 arranged on the top cover main body 31, and at least one top cover fixing hole 35 arranged on the top cover main body 31. The top cover 30 is also made of insulating materials, so as to prevent current conduction through the top cover 30.

[0036] The top cover body 31 is used to close the top of the second outer cover unit 22, and the outer contour of the top cover mounting groove 32 is the same as the outer contour of the top edge of the second outer cover unit 22, so that the top cover 30 can be stably installed on the second outer cover unit 22.

[0037] The top cover mounting bracket 33 includes a top cover mounting bracket body 331 and a top cover connection through hole 332 disposed on the top cover mounting bracket body 331.

[0038] The top cover mounting bracket body 331 is integrally formed with the top cover body 31 to ensure structural stability between the top cover mounting bracket body 331 and the top cover body 31. The top cover connecting through hole 332 is used to install the connecting component 40, through which the top cover 30 and the outer cover component 20 are connected together. The top cover connecting through hole 332 will be described in conjunction with the connecting component 40.

[0039] The lifting ring 34 is a ring-shaped metal component used for lifting, suspending, or connecting heavy objects, and is widely used in industrial scenarios such as lifting, handling, installation, and transportation. The lifting ring 34 is screwed onto the top cover body 31, and the iron core shielding support cover can be moved by the lifting ring 34.

[0040] Each of the connection components 40 includes an insulating screw 41 and a plurality of insulating nuts 42 disposed on the insulating screw 41. The insulating screw 41 and the insulating nuts 42 are both made of insulating material to achieve electrical isolation, prevent current from being conducted through the screw or nut, thereby avoiding the risk of short circuits or leakage and ensuring the safety and reliability of equipment operation.

[0041] When the connecting assembly 40 connects the insulating base plate 10, the outer cover assembly 20, and the top cover 30 together, the top cover connecting through hole 332, the positioning groove 2115, and the connecting through hole 13 correspond to each other. The insulating screw 41 is inserted into the top cover connecting through hole 332, the positioning groove 2115, and the connecting through hole 13. The multiple insulating nuts 42 on the insulating screw 41 abut against the top cover mounting bracket 33, the mounting bracket 2114, and the insulating base plate 10, respectively.

[0042] During the assembly of the core shielding support cover and the reactor core, the reactor core can be C-shaped or U-shaped. Two cores are symmetrically combined to form a complete reactor core. The core is fixedly connected to the bottom of the reactor core by screws passing through the base plate fixing holes 14 in the insulating base plate 10. The outer covers 211 in the first outer cover unit 21 and the second outer cover unit 22 are interlocked together. The first outer cover unit 21 and the second outer cover unit 22 cover the outside of the reactor core. The first outer cover unit 21 and the second outer cover unit 22 provide insulating shielding covers on the outside of the core and inside the central hole. The coil is positioned outside the outer cover assembly 20. The outer cover assembly 20 is embedded in the positioning groove 12 of the insulating base plate 10 to stabilize the position of the outer cover assembly 20 on the insulating base plate 10. The top cover 30 is disposed on the top of the outer cover assembly 20. The insulating screw 41 is inserted into the top cover connecting through hole 332, positioning groove 2115, and connecting through hole 13. Multiple insulating nuts 42 on the insulating screw 41 abut against the top cover mounting bracket 33, mounting bracket 2114, and insulating base plate 10, respectively, thereby connecting the insulating base plate 10, outer cover assembly 20, and top cover 30 together. Screws pass through the top cover fixing hole 35 and are screwed to the top of the reactor core for fixation. Thus, the reactor core, insulating base plate 10, outer cover assembly 20, and top cover 30 form a stable structure. Compared with the prior art, the core shielding support outer cover provided by this utility model covers the outside of the core through the insulating base plate 10, outer cover assembly 20, and top cover 30, and the connecting assembly 40 connects the insulating base plate 10, outer cover assembly 20, and top cover 30 into a whole. The outer cover assembly 20 includes a first outer cover unit 21 disposed on the insulating base plate 10, a second outer cover unit 22 disposed on one side of the first outer cover unit 21, and a connecting ring 23 disposed between the first outer cover unit 21 and the second outer cover unit 22. The first outer cover unit 21 and the second outer cover unit 22 have the same structure and are symmetrical to each other. The first outer cover unit 21 and the second outer cover unit 22 each include two outer covers 211 that are interlocked together. Each outer cover 211 includes an outer cover body 2111, an outer cover limiting groove 2112 disposed on the inner sidewall edge of the outer cover body 2111, an outer cover limiting protrusion 2113 disposed on the inner sidewall edge of the outer cover body 2111, a mounting bracket 2114 disposed on the outer sidewall of the outer cover body 2111, and a positioning groove 2115 disposed on the mounting bracket 2114. The top cover 30 includes a top cover body 31, a top cover mounting groove 32 disposed on one side of the top cover body 31, and two top cover mounting brackets 33 symmetrically disposed on the side wall of the top cover body 31. Each of the top cover mounting brackets 33 has a top cover connecting through hole 332 on its top cover mounting bracket body 331.The positioning groove 12 in the insulating base plate 10 and the top cover mounting groove 32 in the top cover 30 respectively accommodate the two ends of the outer cover assembly 20, so as to stabilize the connection between the outer cover assembly 20, the insulating base plate 10, and the top cover 30. When the connecting assembly 40 connects the insulating base plate 10, the outer cover assembly 20, and the top cover 30 together, the top cover connecting through hole 332, the positioning groove 2115, and the connecting through hole 13 correspond to each other. The insulating screw 41 is inserted into the top cover connecting through hole 332, the positioning groove 2115, and the connecting through hole 13. The multiple insulating nuts 42 on the insulating screw 41 respectively abut against the top cover mounting bracket 33, the mounting bracket 2114, and the insulating base plate 10, so as to realize that the outer cover assembly 20 covers and supports the outside of the iron core. The insulating base plate 10 and the top cover 30 are disposed at both ends of the iron core. The first outer cover unit 21 and the second outer cover unit 22 in the outer cover assembly 20 are provided with insulating shields covering the outside of the iron core and inside the central hole. The coil is disposed outside the outer cover assembly 20. It can be seen that the iron core shielding support outer cover achieves a compact structure of fully enclosed support type insulating shielding outer cover, which is easy to install. It can serve as an external structural support component for the iron core, and can also form a shielding layer between the iron core and the coil. At the same time, it can effectively isolate the noise of the iron core during operation, further shorten the insulation distance, and reduce the size of the reactor.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A core shielding support cover, characterized in that: The iron core shielding support outer cover comprises an insulating bottom plate, an outer cover assembly arranged on the insulating bottom plate, a top cover arranged at the top of the outer cover assembly, and at least two connection assemblies arranged among the insulating bottom plate, the outer cover assembly and the top cover. The insulating bottom plate comprises an insulating bottom plate main body, a positioning groove arranged on the insulating bottom plate main body, and two connection through holes symmetrically arranged on the insulating bottom plate main body. The outer cover assembly comprises a first outer cover unit arranged on the insulating bottom plate, a second outer cover unit arranged at one side of the first outer cover unit, and a connection ring arranged between the first outer cover unit and the second outer cover unit. The first outer cover unit and the second outer cover unit have the same structure and are symmetrical to each other. Both the first outer cover unit and the second outer cover unit comprise two outer covers buckled with each other. Each outer cover comprises an outer cover main body, an outer cover limiting groove arranged at the edge of the inner side wall of the outer cover main body, an outer cover limiting protrusion arranged at the edge of the inner side wall of the outer cover main body, a mounting bracket arranged on the outer side wall of the outer cover main body, and a positioning groove arranged on the mounting bracket. The top cover comprises a top cover main body, a top cover mounting groove arranged at one side of the top cover main body, and two top cover mounting brackets symmetrically arranged on the side wall of the top cover main body. The top cover mounting bracket comprises a top cover mounting bracket main body and a top cover connection through hole arranged on the top cover mounting bracket main body. Each connection assembly comprises an insulating screw rod and a plurality of insulating nuts arranged on the insulating screw rod. When the connection assembly connects the insulating bottom plate, the outer cover assembly and the top cover together, the top cover connection through hole, the positioning groove and the connection through hole correspond to each other, the insulating screw rod is inserted into the top cover connection through hole, the positioning groove and the connection through hole, and the plurality of insulating nuts on the insulating screw rod respectively abut against the top cover mounting bracket, the mounting bracket and the insulating bottom plate.

2. The iron core shielding support cover as described in claim 1, characterized in that: The top cover further comprises a lifting ring arranged on the top cover main body.

3. The iron core shielding support cover as described in claim 1, characterized in that: The top cover main body and the top cover mounting bracket are integrally formed.

4. The iron core shielding support cover as described in claim 1, characterized in that: The top cover further comprises at least one top cover fixing hole arranged on the top cover main body.

5. The iron core shielding support cover as described in claim 1, characterized in that: The insulating bottom plate further comprises at least one bottom plate fixing hole arranged on the insulating bottom plate main body.

6. The iron core shielding support cover as described in claim 1, characterized in that: The outer cover main body and the mounting bracket are integrally formed.

7. The iron core shielding support cover as described in claim 1, characterized in that: The connection ring comprises a connection ring main body and outer cover limiting grooves arranged at two sides of the connection ring main body.

8. The iron core shielding support cover as described in claim 1, characterized in that: The outer contour of the outer cover main body is in a U shape.

9. The iron core shielding support cover as described in claim 1, characterized in that: Each outer cover further comprises a shielding inner cover arranged on the outer cover main body, and the outer cover limiting groove and the outer cover limiting protrusion are arranged at the edge of the shielding inner cover.

10. The iron core shielding support cover as described in claim 1, characterized in that: When the first outer cover unit and the second outer cover unit are buckled together, the outer contour of the outer cover assembly is in a square shape.

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