Solid insulation cabinet

Abstract

The invention relates to the field of power distribution equipment, in particular to a solid insulation cabinet which comprises modules and a protection ring, the modules are connected through a conductive loop, the protection ring is located between the modules and wraps the conductive loop, the protection ring is composed of sheets with special structures, the sheets are fixed through bolts to form a closed ring, and the closed ring is connected with the modules. And a solid insulating medium is attached to a head-tail seam and a module contact part, so that insulation between the protection ring and a conductive loop is ensured. In addition, the internal design of the protection ring realizes a specific air pressure difference to enhance the insulation performance. The purposes of improving the electrical safety and reliability of the solid insulation cabinet and optimizing the insulation effect are achieved, meanwhile, the installation and maintenance process is simplified, and the overall stability is improved.

Description

Technical Field

[0001] This application relates to the field of distribution equipment, and particularly to a solid-insulated cabinet. Background Art

[0002] With the continuous expansion of the power grid scale, the requirements for high-voltage distribution equipment are also getting higher and higher.

[0003] Although traditional gas-insulated cabinets have good insulation performance, due to the filling of gases with significant greenhouse effects such as sulfur hexafluoride (SF6) inside them, problems have gradually emerged in terms of environmental protection and safety.

[0004] In recent years, solid-insulated cabinets have begun to attract attention as a new alternative. Solid-insulated cabinets achieve miniaturization, reliability, and environmental friendliness of equipment by using epoxy resin or other solid dielectrics as the main insulation materials. These characteristics make solid-insulated cabinets increasingly important in modern power systems and become an important part of future development trends. In addition, solid-insulated cabinets can also maintain stable performance in extreme environments, which further enhances their market competitiveness and technological development potential.

[0005] The insulation method of existing solid-insulated cabinets is as follows: specific equipment, switches, etc. are used alone or in combination and then connected by a conductive circuit, and are encapsulated with a solid insulation medium into one or several modules with certain functions, which can be recombined or expanded and have full insulation and full-sealing performance.

[0006] Multiple modules encapsulated with a solid insulation medium are installed in the cabinet body, and conductive circuits are still required to connect between the modules, and the conductive circuits between the modules need to be shielded. Summary of the Invention

[0007] In order to achieve safe shielding and reliable connection of conductive circuits between modules, this application provides a solid-insulated cabinet.

[0008] The solid-insulated cabinet provided by this application adopts the following technical solutions: A solid-insulated cabinet includes modules and protective rings. The modules are connected by conductive circuits. The protective rings are located between the modules. The conductive circuits between the modules are located inside the protective rings. There is a solid insulation medium attached between the ends of the protective rings and the surfaces of the modules. The protective rings have conductivity, and there is insulation between the protective rings and the conductive circuits.

[0009] By adopting the above technical solutions, the safe shielding and reliable connection of the conductive circuits between modules are realized. Specifically, the conductive circuit is wrapped by a protective ring, and at the same time, a solid insulating medium is attached to the end of the protective ring and the module surface, so that the inside of the protective ring is isolated from the outside, avoiding the short-circuit risk caused by external factors. In addition, the protective ring itself has conductivity but is insulated from the conductive circuit, realizing electromagnetic shielding, improving electrical safety to a certain extent, and meeting the requirements of modern power systems for miniaturized, fully insulated, and fully sealed high-performance equipment.

[0010] Preferably, the protective ring is formed by connecting the head and tail of sheet materials. A through hole is provided at the head end of the sheet material, and a threaded hole is provided at the tail end of the sheet material. A bolt passes through the through hole and is threadedly connected to the threaded hole. A solid insulating medium is attached to the joint of the head and tail of the sheet material.

[0011] By adopting the above technical solutions, the protective ring is formed by connecting the head and tail of sheet materials, avoiding the installation limitations brought by pre-fixing the sheet materials into a ring shape, so that the protective ring can be more flexibly sleeved on the conductive circuit between modules; that is, during the production and maintenance of the solid insulating cabinet, it is convenient to assemble and replace the protective ring.

[0012] The direct conduction between the head and tail ends of the sheet material is realized through a bolt, achieving electromagnetic shielding. A solid insulating medium is attached to the joint of the head and tail of the sheet material, realizing the isolation between the inside of the protective ring and the outside.

[0013] Preferably, a solid insulating medium is attached to one side of the sheet material. The other side of the sheet material is used for the head of the bolt to touch.

[0014] By adopting the above technical solutions, the side of the sheet material attached with the solid insulating medium is used to form the inner circumference of the protective ring, which is beneficial to the insulation between the protective ring and the conductive circuit.

[0015] Preferably, without external force, the head and tail ends of the sheet material are separated from each other.

[0016] By adopting the above technical solutions, if the protective ring needs to be replaced, the elastic force generated by the elastic deformation of the protective ring itself makes the head and tail ends tend to move away from each other, which can facilitate the assembly and disassembly of the protective ring and improve the operation convenience.

[0017] Preferably, the sheet material includes a base sheet and a contact sheet. Both the through hole and the threaded hole are located on the base sheet. One end of the contact sheet is connected to the head end of the base sheet, and there is a gap between the other end of the contact sheet and the base sheet. The surface of the contact sheet facing away from the base sheet is used to touch the tail end of the base sheet.

[0018] By adopting the above technical solution, when the bolt is tightened, the abutting piece is closely attached to the tail end of the substrate, which is beneficial to isolate the inside of the protective ring from the outside.

[0019] Preferably, along the head and tail direction of the substrate, the abutting piece is located between the through hole and the threaded hole.

[0020] By adopting the above technical solution, it is beneficial to isolate the inside of the protective ring from the outside and avoid the through hole from causing the inside and outside of the protective ring to communicate.

[0021] Preferably, when the substrate is flat, the distance between the abutting piece and the substrate increases as it approaches the through hole.

[0022] By adopting the above technical solution, after the substrates are connected end to end, the free end of the abutting piece is close to the threaded hole, which is beneficial to the free ends of the substrate and the abutting piece to be closely attached under the action of the bolt.

[0023] Preferably, when the temperature inside and outside the protective ring is the same, the air pressure inside the protective ring is less than the air pressure outside the protective ring.

[0024] By adopting the above technical solution, during the process of coating the solid insulating medium, the air pressure difference is beneficial to the liquid solid insulating medium to penetrate between the end of the protective ring and the surface of the module. During the working process, the temperature inside the protective ring is higher than the outside temperature, and the air pressure inside the protective ring increases, which is beneficial to the air pressure balance inside and outside the protective ring.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Using the protective ring to wrap the conductive circuit, and at the same time attaching the solid insulating medium to the end of the protective ring and the surface of the module, so that the inside of the protective ring is isolated from the outside and the short - circuit risk caused by external factors is avoided; 2. The design that the protective ring itself has conductivity but is insulated from the conductive circuit realizes electromagnetic shielding and improves electrical safety to a certain extent; 3. When the temperature inside and outside the protective ring is the same, the air pressure inside the protective ring is less than the air pressure outside the protective ring. During the process of coating the solid insulating medium, the air pressure difference is beneficial to the liquid solid insulating medium to penetrate between the end of the protective ring and the surface of the module; during the working process, it is beneficial to the air pressure balance inside and outside the protective ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the module and the protective ring.

[0027] Figure 2 is a schematic diagram of the protective ring.

[0028] Figure 3 is Figure 2 an enlarged view of part A in

[0029] Figure 4 It is a schematic diagram of the preferred structure of the protective ring.

[0030] Explanation of reference numerals: 1. Module; 2. Protective ring; 21. Sheet; 211. Substrate; 212. Contact sheet; 22. Through hole; 23. Threaded hole; 24. Bolt. Specific embodiments

[0031] The present application will be further described in detail below with reference to the accompanying drawings.

[0032] Specific devices, switches, etc. are used alone or in combination and then connected by a conductive circuit, and are encapsulated with a solid insulating medium into one or several modules with certain functions, which can be recombined or expanded and have the performance of full insulation and full sealing.

[0033] Refer to Figure 1 , an embodiment of the present application discloses a solid-insulated cabinet, including a module 1 and a protective ring 2.

[0034] There are multiple modules 1, and the modules 1 are connected by a conductive circuit.

[0035] The protective ring 2 is located between the modules 1, and a solid insulating medium is attached between the end of the protective ring 2 and the surface of the module 1 to isolate the inside and outside of the protective ring 2.

[0036] The conductive circuit between the modules 1 is located inside the protective ring 2. The protective ring 2 has conductivity, and the protective ring 2 and the conductive circuit are insulated from each other to realize providing electromagnetic shielding for the conductive circuit by using the protective ring 2.

[0037] When the temperatures inside and outside the protective ring 2 are the same, the air pressure inside the protective ring 2 is less than the air pressure outside the protective ring 2.

[0038] In an installation embodiment of the protective ring 2: The protective ring 2 is sleeved outside the conductive circuit; The protective ring 2 is heated; for example, hot air is blown onto the outer surface of the protective ring 2 by using a hot air gun; The liquid solid insulating medium is applied to the protective ring 2; specifically, the liquid solid insulating medium is applied to the gap between the end of the protective ring 2 and the surface of the module 1, and the liquid solid insulating medium is applied to the outer surface of the protective ring 2; The protective ring 2 is cooled; for example, the hot air gun stops working and the protective ring 2 cools naturally.

[0039] If necessary, during the process of cooling the protective ring 2, the liquid solid insulating medium is continuously applied, and the liquid solid insulating medium penetrates into the gap.

[0040] Refer to Figure 2 andFigure 3 , the protective ring 2 is formed by connecting the head and tail of the sheet 21 end to end.

[0041] A through hole 22 is provided at the head end of the sheet 21, and a threaded hole 23 is provided at the tail end of the sheet 21. A bolt 24 passes through the through hole 22 and is threadedly connected into the threaded hole 23 to form a ring shape. A solid insulating medium is attached to the head and tail joint of the sheet 21 to isolate the inside and outside of the protective ring 2.

[0042] A solid insulating medium is attached to one side of the sheet 21, and the other side of the sheet 21 is used for the head of the bolt 24 to touch the sheet 21, so that the head and tail ends of the sheet 21 are electrically connected through the bolt 24.

[0043] At the same time, without external force, the head and tail ends of the sheet 21 are separated from each other. If necessary, a sealing ring is provided in the threaded hole 23, and the sealing ring is used to prevent the liquid solid insulating medium from continuing to penetrate, so as to ensure electrical connection between the bolt 24 and the inner wall of the threaded hole 23.

[0044] The sealing ring can be located in the middle of the threaded hole 23, When the sheet 21 is bent into a ring shape, the sealing ring can also be located at one end of the threaded hole 23 away from the center of the circle.

[0045] More specifically, the sheet 21 includes a base sheet 211 and a contact sheet 212.

[0046] Both the through hole 22 and the threaded hole 23 are located on the base sheet 211.

[0047] One end of the contact sheet 212 is connected to the head end of the base sheet 211, and there is a gap between the other end of the contact sheet 212 and the base sheet 211.

[0048] The surface of the contact sheet 212 facing away from the base sheet 211 is used to touch the tail end of the base sheet 211.

[0049] Along the head and tail direction of the substrate, the contact sheet 212 is located between the through hole 22 and the threaded hole 23.

[0050] In an embodiment of the sheet 21: when the base sheet 211 is flat, the gap between the contact sheet 212 and the base sheet 211 increases as it is farther away from the through hole 22.

[0051] Preferably: referring to Figure 4 , when the base sheet 211 is flat, the gap between the contact sheet 212 and the base sheet 211 increases as it is closer to the through hole 22.

[0052] The implementation principle of a solid insulation cabinet in an embodiment of this application is as follows: The conductive circuit is wrapped by the protective ring 2, and at the same time, a solid insulation medium is attached to the end of the protective ring 2 and the surface of the module 1, so that the inside of the protective ring 2 is isolated from the outside world, avoiding the short-circuit risk caused by external factors. The protective ring 2 itself has conductivity but is designed to be insulated from the conductive circuit, realizing electromagnetic shielding and improving electrical safety to a certain extent.

[0053] The above are all preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A solid-insulated cabinet, characterized in that, It includes a module (1) and a protective ring (2). The modules (1) are connected by a conductive circuit. The protective ring (2) is located between the modules (1). The conductive circuit between the modules (1) is located within the protective ring (2). A solid insulating medium is attached between the end of the protective ring (2) and the surface of the module (1). The protective ring (2) has conductivity, and insulation exists between the protective ring (2) and the conductive circuit.

2. The solid insulation cabinet according to claim 1, wherein The protective ring (2) is formed by connecting the ends of sheet materials (21). A through hole (22) is provided at the head end of the sheet material (21), and a threaded hole (23) is provided at the tail end of the sheet material (21). A bolt (24) passes through the through hole (22) and is threadedly connected to the threaded hole (23). A solid insulating medium is attached to the joint between the head and tail of the sheet material (21).

3. The solid insulation cabinet according to claim 2, characterized in that, A solid insulating medium is attached to one side of the sheet material (21). The other side of the sheet material (21) is for the head of the bolt (24) to touch.

4. The solid insulation cabinet according to claim 2, characterized in that In the absence of external force, the head and tail ends of the sheet material (21) are separated from each other.

5. The solid insulation cabinet according to claim 4, characterized in that, The sheet material (21) includes a base sheet (211) and a contact sheet (212). Both the through hole (22) and the threaded hole (23) are located on the base sheet (211). One end of the contact sheet (212) is connected to the head end of the base sheet (211), and there is a gap between the other end of the contact sheet (212) and the base sheet (211). The surface of the contact sheet (212) facing away from the base sheet (211) is for touching the tail end of the base sheet (211).

6. The solid insulation cabinet according to claim 5, characterized in that, Along the head-tail direction of the substrate, the contact sheet (212) is located between the through hole (22) and the threaded hole (23).

7. The solid insulation cabinet according to claim 6, characterized in that, When the base sheet (211) is flat, the gap between the contact sheet (212) and the base sheet (211) increases as it approaches the through hole (22).

8. The solid insulation cabinet according to claim 1, wherein When the temperature inside and outside the protective ring (2) is the same, the air pressure inside the protective ring (2) is less than the air pressure outside the protective ring (2).

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