Single-phase double-coil air-core reactor

Abstract

The utility model relates to the technical field of electric reactors, in particular to a single-phase double-coil air-core electric reactor which comprises a frame, a first electric reactor, a second electric reactor and an insulating cylinder. The frame is of an open box-shaped structure; the first electric reactor and the second electric reactor are arranged on the inner side of the frame through the insulating cylinder, the first electric reactor and the second electric reactor are sequentially arranged in the axial direction of the insulating cylinder, and the mechanical strength and the protection capacity of the air-core electric reactor can be improved through the air-core electric reactor.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, and particularly to a single-phase double-coil air-core reactor. Background Art

[0002] An air-core reactor is an inductive high-voltage electrical appliance used in a power system to limit short-circuit current, reactive power compensation, phase shift, etc. The magnetic flux forms a loop through air, so it is called an air-core reactor. The applicant's existing patent for an air-core reactor, publication number: CN220543697U, improves the mechanical strength of the reactor by arranging the air-core reactor body between two insulating plates with larger sizes. However, during actual use or transportation, the coils of the reactor will also be squeezed from the side. Therefore, how to further optimize the structure of the existing reactor to improve the mechanical strength and protection performance of the reactor is a problem that needs to be solved in this field. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a single-phase double-coil air-core reactor, which can improve the mechanical strength and protection ability of the air-core reactor.

[0004] To achieve the above purpose, the utility model provides the following technical solutions: A single-phase double-coil air-core reactor includes a frame, a first reactor, a second reactor, and an insulating cylinder; the frame is an open box-shaped structure; the first reactor and the second reactor are arranged inside the frame through the insulating cylinder, wherein the first reactor and the second reactor are arranged in sequence along the axial direction of the insulating cylinder.

[0005] Preferably, the frame includes a first insulating plate, side plates, a second insulating plate, and a plurality of tie bolts. The first insulating plate, side plates, and second insulating plate are sequentially enclosed to form a gate-shaped structure, wherein the first insulating plate and the second insulating plate are fixedly connected by tie bolts; the insulating cylinder is arranged between the first insulating plate and the second insulating plate; through holes communicating with the insulating cylinder are provided on both the first insulating plate and the second insulating plate.

[0006] Preferably, a plurality of connecting plates are provided on the side plates; the connecting plates are fixedly connected to the first insulating plate and the second insulating plate.

[0007] Preferably, the first insulating plate and the second insulating plate have the same structure; a bracket is provided inside the through hole on the first insulating plate, and a groove adapted to the insulating cylinder is provided on the bracket; the insulating cylinder is inserted into the first insulating plate and the second insulating plate through the groove.

[0008] Preferably, a plurality of U-shaped grooves are provided at both the head and tail ends of the insulating cylinder; the dimension of the U-shaped groove along the axial direction of the insulating cylinder is greater than the depth of the groove.

[0009] Preferably, it further includes a number of fixing plates; the fixing plates are distributed on the inner sides of the first insulating plate and the second insulating plate.

[0010] Preferably, the first reactor and the second reactor have the same structure; the second reactor includes a plurality of coils and a plurality of airway braces; the plurality of coils are sequentially sleeved on the outer periphery of the insulating cylinder from inside to outside through the plurality of airway braces; the channels between adjacent coils are communicated with the through holes.

[0011] Preferably, the second reactor further includes a protective cylinder; the protective cylinder is sleeved on the outer periphery of the second reactor body; the protective cylinder is made of glass fiber wound with impregnated epoxy resin.

[0012] Preferably, the fixing plate has an L-shaped structure.

[0013] Preferably, the side plate is made of metal.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: by arranging a frame with a portal structure on the outer sides of the first reactor and the second reactor, the frame is sequentially surrounded by the first insulating plate, the side plate and the second insulating plate, such a design can provide more comprehensive protection for the first reactor and the second reactor, and improve the mechanical strength and protection ability of the present air-core reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the air-core reactor of the present utility model;

[0016] Figure 2 is a schematic diagram of the front-side structure of the air-core reactor of the present utility model;

[0017] Figure 3 is a schematic diagram of the structure of the first insulating plate of the present utility model;

[0018] Figure 4 is a schematic diagram of the structure of the side plate of the present utility model;

[0019] Figure 5 is a schematic diagram of the structure of the insulating cylinder of the present utility model.

[0020] In the figure: 1 first insulating plate, 2 side plate, 3 second insulating plate, 4 tie bolts, 5 first reactor, 6 second reactor, 7 insulating cylinder, 8 fixing plate, 9 insulator, 10 discharge row, 11 fixing frame, 101 through hole, 102 bracket, 103 groove, 201 connecting plate, 601 coil, 602 airway brace, 701 U-shaped groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings, so that those skilled in the art can more clearly understand how to practice the present invention. Although the present invention is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative and do not limit the scope of the present invention.

[0022] Specific Embodiment 1: Please refer to Figures 1-5 A single-phase double-coil air-core reactor, comprising: a first insulating plate 1, side plates 2, a second insulating plate 3, a plurality of tie bolts 4, a first reactor 5, a second reactor 6, and an insulating cylinder 7. The insulating cylinder 7 is fixedly arranged between the first insulating plate 1 and the second insulating plate 3 through a plurality of tie bolts 4. The first reactor 5 and the second reactor 6 are arranged between the first insulating plate 1 and the second insulating plate 3 through the insulating cylinder 7, and the first reactor 5 and the second reactor 6 are arranged in sequence along the axial direction of the insulating cylinder 7. The two ends of the side plates 2 are respectively fixedly connected to the first insulating plate 1 and the second insulating plate 3 to form a frame with a portal structure. The first reactor 5 and the second reactor 6 are arranged inside the frame in a semi-surrounding manner. Such a design can provide more comprehensive protection for the first reactor 5 and the second reactor 6 and improve the mechanical strength of the present air-core reactor.

[0023] Each of the first reactor 5 and the second reactor 6 is equipped with two sets of wiring components, and the four sets of wiring components are all arranged on the outer end surface of the second insulating plate 3; the wiring components include insulators 9 and outgoing line rows 10.

[0024] In this embodiment, the first insulating plate 1 and the second insulating plate 3 have the same structure. A through hole 101 is opened in the middle of the first insulating plate 1. A cross-shaped bracket 102 is arranged inside the through hole 101. A ring-shaped groove 103 adapted to the insulating cylinder 7 is opened in the middle of the bracket 102. The insulating cylinder 7 can be pre-assembled with the first insulating plate 1 and the second insulating plate 3 by plugging. Such a setting can effectively improve the assembly efficiency of the present air-core reactor.

[0025] In order to improve the heat dissipation efficiency and avoid heat accumulation due to the closed internal space of the insulating cylinder 7, a plurality of U-shaped grooves 701 are opened at both the head and tail ends of the insulating cylinder 7. The axial dimension of the U-shaped grooves 701 is designed to be greater than the depth of the groove 103.

[0026] The first reactor 5 and the second reactor 6 have the same structure. Taking the second reactor 6 as an example, the second reactor 6 includes a plurality of coils 601 and a plurality of air duct braces 602. The plurality of coils 601 are sleeved on the circumferential outer side of the insulating cylinder 7, and each coil 601 is sequentially sleeved from the inside to the outside on the outer circumference of the insulating cylinder 7. The outer diameter of the inner layer coil 601 is smaller than the inner diameter of the outer layer coil 601. At the same time, air duct braces 602 are arranged between adjacent coils 601. One side of the air duct brace 602 abuts against the outer surface of the inner layer coil 601, and the other side abuts against the inner surface of the outer layer coil 601. The air duct brace 602 serves to support the heat dissipation air duct. The length direction of the air duct brace 602 is consistent with the axial direction of the coil 601, so that adjacent coils 601 are not closely adjacent to each other, leaving a longitudinal air duct communicating with the through hole 101 between adjacent coils 601 to improve the heat dissipation effect of the hollow reactor and enhance the heat dissipation capacity of the hollow reactor. Further, a protective cylinder (not shown in the figure) is also sleeved outside the outermost coil 601. The protective cylinder is made of glass fiber wound with impregnated epoxy resin, which can not only make the first reactor 5 have good integrity, but also improve its mechanical strength and have strong ability to withstand the impact of short-time current.

[0027] The side plate 2 is arranged at the upper ends of the first insulating plate 1 and the second insulating plate 3. Connecting plates 201 are also provided at the four corners of the side plate 2. After assembly, the connecting plates 201 are fixedly connected to the first insulating plate 1 and the second insulating plate 3 by bolts. The main plane of the connecting plate 201 is perpendicular to the main plane of the side plate 2 body. The side plate 2 is made of metal material.

[0028] In one embodiment, in order to facilitate the subsequent installation of the hollow reactor, a fixing frame 11 is further provided at the upper end of the side plate 2.

[0029] In one embodiment, in order to facilitate the fixation of the hollow reactor during transportation, the hollow reactor further includes a plurality of fixing plates 8. The plurality of fixing plates 8 are distributed on the inner side plates of the first insulating plate 1 and the second insulating plate 3. The fixing plate 8 has an L-shaped structure.

[0030] In one embodiment, in order to further improve the mechanical strength of the hollow reactor, it can be achieved by adding side plates between the outer sides of the first reactor 5 and the second reactor 6 and between the first insulating plate 1 and the second insulating plate 3. That is to say, the frame composed of the first insulating plate 1, the side plate 2, and the second insulating plate 3 can be an open box-like structure, which can improve its mechanical strength and protection ability while ensuring the heat dissipation of the hollow reactor.

[0031] Through this technical solution, by arranging a frame in the shape of a portal outside the first reactor and the second reactor, the frame is formed by sequentially enclosing the first insulating plate, the side plates and the second insulating plate. Such a design can provide more comprehensive protection for the first reactor and the second reactor, and improve the mechanical strength of this air-core reactor.

[0032] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A single-phase double-coil air-core reactor, characterized in that: The invention comprises a frame, a first reactor (5), a second reactor (6) and an insulating cylinder (7); the frame is an open box-shaped structure; the first reactor (5) and the second reactor (6) are arranged on the inner side of the frame through the insulating cylinder (7), wherein the first reactor (5) and the second reactor (6) are arranged in sequence along the axial direction of the insulating cylinder (7).

2. A single-phase double-coil air-core reactor according to claim 1, characterized in that: The frame comprises a first insulating plate (1), a side plate (2), a second insulating plate (3) and a plurality of tension bolts (4); the first insulating plate (1), the side plate (2) and the second insulating plate (3) are sequentially combined to form a door-shaped structure, wherein the first insulating plate (1) and the second insulating plate (3) are fixedly connected by the tension bolts (4); an insulating tube (7) is arranged between the first insulating plate (1) and the second insulating plate (3); and through holes communicating with the insulating tube (7) are provided on the first insulating plate (1) and the second insulating plate (3).

3. A single-phase double-coil air-core reactor according to claim 2, characterized in that: A plurality of connection plates (201) are provided on the side plate (2); the connection plates (201) are fixedly connected to the first insulating plate (1) and the second insulating plate (3).

4. A single-phase double-coil air-core reactor according to claim 2, characterized in that: The first insulating plate (1) and the second insulating plate (3) have the same structure; a bracket is provided on the inner side of the through hole of the first insulating plate (1), and a groove matching the insulating cylinder (7) is provided on the bracket; the insulating cylinder (7) is plugged into the first insulating plate (1) and the second insulating plate (3) via the groove.

5. A single-phase double-coil air-core reactor according to claim 4, characterized in that: A plurality of U-shaped grooves are provided at both ends of the insulating tube (7); the dimension of the U-shaped groove along the axial direction of the insulating tube (7) is greater than the depth of the groove.

6. The single-phase double-coil air-core reactor according to claim 1, characterized in that: It also comprises a plurality of fixing plates (8); the fixing plates (8) are distributed on the inner sides of the first insulating plate (1) and the second insulating plate (3).

7. A single-phase double-coil air-core reactor according to claim 2, characterized in that: The first reactor (5) and the second reactor (6) have the same structure; the second reactor (6) comprises a plurality of coils and a plurality of airway stays; the plurality of coils are sequentially sleeved from the inside to the outside on the outer circumference of the insulating cylinder (7) via the plurality of airway stays; and the channels between adjacent coils are connected to the through holes.

8. The single-phase double-coil air-core reactor according to claim 1, characterized in that: The second reactor (6) further comprises a protective tube; the protective tube is sleeved on the outer circumference of the second reactor (6) body; the protective tube is made by winding glass fibers impregnated with epoxy resin.

9. The single-phase double-coil air-core reactor according to claim 6, characterized in that: The fixing plate (8) is in an L-shaped structure.

10. The single-phase double-coil air-core reactor according to claim 2, characterized in that: The side plate (2) is made of metal.

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