Air-core reactor suitable for low-temperature environment

Abstract

The utility model belongs to the field of power system equipment, and provides an air-core reactor suitable for a low-temperature environment, which comprises a coil assembly, and the coil assembly comprises a winding, an air duct drawing strip, an upper star-shaped frame and a lower star-shaped frame. The winding comprises an encapsulation insulation inner layer, a conductor, an encapsulation insulation outer layer, a resin layer and a silicon rubber layer which are arranged from inside to outside, the encapsulation insulation inner layer and the encapsulation insulation outer layer wrap the conductor, the resin layer wraps the insulation inner layer, the conductor and the encapsulation insulation outer layer, and the silicon rubber layer wraps the resin layer. The encapsulation insulation inner layer and the encapsulation insulation outer layer can isolate and protect the conductor, and meanwhile, the silicone rubber layer wraps the resin layer, so that the problems of resin cracking, material failure and the like which are easy to occur in a low-temperature environment can be prevented.

Description

Technical Field

[0001] The utility model belongs to the field of power system equipment, and in particular relates to a hollow reactor suitable for low-temperature environments. Background Art

[0002] Air-core reactors have been widely developed and applied in power systems. These include shunt reactors that improve voltage distribution on long transmission lines and absorb capacitive reactive power in cable lines; series reactors that are connected in series or parallel with capacitors to limit higher-order harmonics generated in the power grid; current-limiting reactors that limit feeder overcurrent in the event of a fault in the power system; and filter reactors that absorb grid harmonics and improve system power factor and safety. With the continuous expansion of power systems and the growing demand for air-core reactors in the global market, air-core reactors are inevitably being used in extremely cold regions and environments. Therefore, the issues that air-core reactors are prone to, such as resin cracking and material failure, require urgent attention. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an air-core reactor suitable for low-temperature environments.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A hollow reactor suitable for low-temperature environments, comprising a coil assembly, wherein the coil assembly comprises a winding, an air duct drawing bar, an upper star frame and a lower star frame;

[0006] The number of the windings is more than two, the air duct guide strips are arranged between adjacent windings, and the upper star frame and the lower star frame are respectively arranged at the top and bottom of the windings;

[0007] The winding includes an encapsulated insulating inner layer, a conductor, an encapsulated insulating outer layer, a resin layer and a silicone rubber layer arranged from the inside to the outside. The encapsulated insulating inner layer and the encapsulated insulating outer layer are wrapped around the conductor, the resin layer is wrapped around the insulating inner layer, the conductor and the encapsulated insulating outer layer, and the silicone rubber layer is wrapped around the resin layer.

[0008] Preferably, the resin layer includes a toughening agent, a curing agent and an epoxy resin.

[0009] Preferably, the encapsulated insulating inner layer and the encapsulated insulating outer layer include woven fabric and alkali-free tape.

[0010] Preferably, the air duct guide strip is a glass fiber frame with a three-dimensional mesh structure.

[0011] Preferably, the cross-section of the air duct guide strip is T-shaped or I-shaped, and the height of the air duct guide strip ranges from 15 mm to 30 mm.

[0012] Preferably, the cross-sectional shape of the winding is circular, and a plurality of the windings are arranged from the inside to the outside with the central axis of the coil assembly as the center.

[0013] Preferably, a plurality of the windings are connected in parallel via the upper star frame and the lower star frame.

[0014] Preferably, the upper star frame and the lower star frame are provided with pull straps for bringing the upper star frame and the lower star frame closer together and for supporting and fixing the windings.

[0015] Preferably, it further comprises a plurality of support insulators, wherein the support insulators are mounted on the bottom of the lower star frame by bolt fasteners.

[0016] Preferably, it further comprises a support base, wherein the support base is mounted on the bottom of the support insulator via the bolt fasteners.

[0017] Compared with the prior art, the beneficial effects of the present invention include:

[0018] The hollow-core inductor suitable for low-temperature environments of the present application has a winding structure having an encapsulated insulating inner layer, an encapsulated insulating outer layer, a resin layer and a silicone rubber layer, which form a composite layer structure with each other. The encapsulated insulating inner layer and the encapsulated insulating outer layer can isolate and protect the conductor. At the same time, the silicone rubber layer is wrapped in the resin layer, which can prevent problems such as resin cracking and material failure that are prone to occur in low-temperature environments. At the same time, the overall structural design is reasonable and easy to assemble, meeting the harsh requirements of the applicable environment of the hollow-core inductor, and can be widely used in low-temperature environmental conditions, greatly improving its reliability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is the main view of the utility model.

[0021] Figure 2 It is a top view of the utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the winding of the utility model connected in parallel with the upper star frame and the lower star frame.

[0023] Figure 4 This is a schematic diagram of the winding structure of the present utility model.

[0024] Figure 5 This is a structural diagram of the air duct guide strip of the present invention.

[0025] in:

[0026] 1-coil assembly, 2-upper star frame, 3-lower star frame, 4-pull belt, 5-winding, 6-duct pull bar, 7-encapsulated insulation inner layer, 8-conductor, 9-encapsulated insulation outer layer, 10-support insulator, 11-support base, 12-resin layer, 13-silicone rubber layer. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of this application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention. The embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] Example:

[0030] like Figure 1-5 As shown, this embodiment provides an air-core reactor suitable for low-temperature environments, including a coil assembly 1, the coil assembly 1 including a winding 5, an air duct drawing bar 6, an upper star frame 2 and a lower star frame 3;

[0031] The number of windings 5 is more than two, the air duct guide strips 6 are provided between adjacent windings 5, and the upper star frame 2 and the lower star frame 3 are provided at the top and bottom of the windings 5 respectively;

[0032] The winding 5 includes an encapsulated insulating inner layer 7, a conductor 8, an encapsulated insulating outer layer 9, a resin layer 12 and a silicone rubber layer 13 arranged from the inside to the outside. The encapsulated insulating inner layer 7 and the encapsulated insulating outer layer 9 are wrapped around the conductor 8, the resin layer 12 is wrapped around the insulating inner layer, the conductor 8, the encapsulated insulating outer layer 9, and the silicone rubber layer 13 is wrapped around the resin layer 12.

[0033] The hollow-core inductor of the present application is suitable for low-temperature environments, and its winding 5 has a structure of an encapsulated insulating inner layer 7, an encapsulated insulating outer layer 9, a resin layer 12 and a silicone rubber layer 13, which form a composite layer structure with each other. The encapsulated insulating inner layer 7 and the encapsulated insulating outer layer 9 can isolate and protect the conductor 8. At the same time, the silicone rubber layer 13 is wrapped in the resin layer 12, which can prevent problems such as resin cracking and material failure that are prone to occur in low-temperature environments.

[0034] The resin layer 12 of this embodiment includes a toughening agent, a curing agent and an epoxy resin. The resin layer can be filled between the insulating inner layer 7, the conductor 8, the encapsulated insulating outer layer 9 and the outside. At the same time, the silicone rubber layer 13 is a reinforced material that can work under extreme temperature conditions without losing its elasticity and physical properties. It is fully encapsulated and sprayed on the resin layer 12, and then cured at high temperature.

[0035] In this embodiment, the encapsulated insulating inner layer 7 and the encapsulated insulating outer layer 9 include woven fabric and alkali-free tape, wherein the alkali-free tape is available in various sizes. The thickness of the encapsulated insulating inner layer 7 and the encapsulated insulating outer layer 9 ranges from 0.5 mm to 2 mm.

[0036] The air duct guide strip 6 of this embodiment is a glass fiber frame with a three-dimensional mesh structure.

[0037] Specifically, the cross section of the air duct guide strip 6 is T-shaped or I-shaped, and the height of the air duct guide strip 6 ranges from 15 mm to 30 mm.

[0038] The cross-sectional shape of the winding 5 in this embodiment is circular, and a plurality of windings 5 are arranged from the inside to the outside with the central axis of the coil assembly 1 as the center.

[0039] The plurality of windings 5 are connected in parallel via the upper star frame 2 and the lower star frame 3 . The conductor 8 and the upper star frame 2 and the lower star frame 3 are made of copper or aluminum.

[0040] In this embodiment, the upper star frame 2 and the lower star frame 3 act to clamp the winding 5. Specifically, a pull belt 4 is provided on the upper star frame 2 and the lower star frame 3 for bringing the upper star frame 2 and the lower star frame 3 closer and supporting and fixing the winding 5.

[0041] At the same time, this embodiment also includes a plurality of support insulators 10, which are installed at the bottom of the lower star frame 3 through bolt fasteners.

[0042] The support insulator 10 further includes a support base 11 , which is mounted on the bottom of the support insulator 10 by bolt fasteners.

[0043] The above structure can facilitate the installation and disassembly of the whole and facilitate maintenance.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An air-core reactor suitable for low-temperature environments, characterized in that: include: A coil assembly, comprising a winding, an air duct guide bar, an upper star frame and a lower star frame; The number of the windings is more than two, the air duct guide strips are arranged between adjacent windings, and the upper star frame and the lower star frame are respectively arranged at the top and bottom of the windings; The winding includes an encapsulated insulating inner layer, a conductor, an encapsulated insulating outer layer, a resin layer and a silicone rubber layer arranged from the inside to the outside. The encapsulated insulating inner layer and the encapsulated insulating outer layer are wrapped around the conductor, the resin layer is wrapped around the insulating inner layer, the conductor and the encapsulated insulating outer layer, and the silicone rubber layer is wrapped around the resin layer.

2. The air-core reactor suitable for low-temperature environments according to claim 1, characterized in that: The air duct guide strip is a glass fiber frame with a three-dimensional mesh structure.

3. The air-core reactor suitable for low-temperature environments according to claim 2, characterized in that: The cross section of the air duct guide strip is T-shaped or I-shaped, and the height of the air duct guide strip ranges from 15 mm to 30 mm.

4. The air-core reactor suitable for low-temperature environments according to claim 1, characterized in that: The cross-section of the winding is circular, and a plurality of the windings are arranged from the inside to the outside with the central axis of the coil assembly as the center.

5. The air-core reactor suitable for low-temperature environments according to claim 1, characterized in that: A plurality of windings are connected in parallel via the upper star frame and the lower star frame.

6. The air-core reactor suitable for low-temperature environments according to claim 1, characterized in that: The upper star frame and the lower star frame are provided with pull belts for bringing the upper star frame and the lower star frame closer together and for supporting and fixing the windings.

7. The air-core reactor suitable for low-temperature environments according to claim 1, characterized in that: It also includes a plurality of support insulators, which are installed on the bottom of the lower star frame through bolt fasteners.

8. The air-core reactor suitable for low-temperature environments according to claim 7, characterized in that: A support base is also included, and the support base is installed on the bottom of the support insulator through the bolt fastener.

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