A ring network switch device
By employing a double-layer gas box filled with insulating gas and a modular design in the ring network switchgear, the insulation breakdown problem of traditional ring network switchgear in harsh environments is solved, achieving high-efficiency insulation performance and convenient maintenance. It is suitable for power distribution and control in environments such as high altitude, humid heat, and extreme cold.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG YIHE ELECTRIC CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional ring network switchgear is prone to insulation breakdown or phase-to-phase short circuits in harsh environments such as high altitude, humid heat, and severe cold due to moisture or dirt in the enclosure, making it difficult to meet insulation performance requirements.
It adopts a gas box structure filled with insulating gas in a sealed cabinet. The gas box has a double-sealed design and is filled with SF6 gas or dry air. Combined with modular disconnect switches and pressure monitoring components, it realizes a self-sealing mechanism to ensure insulation performance.
It avoids insulation breakdown or phase-to-phase short circuits in harsh environments, improves insulation performance, meets the power distribution and control needs of high-altitude, humid and hot, and extremely cold environments, and its modular design facilitates maintenance and installation.
Smart Images
Figure CN224537677U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power equipment technology, and in particular to a ring network switchgear that is especially suitable for power distribution and control in harsh environments such as high altitude, hot and humid conditions, and extreme cold. Background Technology
[0002] Traditional ring main network switchgear typically consists of a sealed enclosure, whose insulation performance relies primarily on the air or heat-shrink tubing freely existing within the enclosure as the insulating medium. This type of ring main network equipment is susceptible to insulation breakdown or phase-to-phase short circuits due to moisture or contamination of the enclosure, making it unsuitable for meeting the insulation requirements of power distribution and control in harsh environments such as high altitudes, high humidity, and extreme cold. Utility Model Content
[0003] In order to solve the technical problems existing in the prior art, the purpose of this invention is to provide a ring network switchgear with better insulation performance, which can meet the insulation performance requirements of power distribution and control in harsh environments such as high altitude, humid heat, and severe cold.
[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:
[0005] A ring network switchgear includes a sealed cabinet, a disconnecting switch, a busbar assembly, a cable plug, and a pressure monitoring component. The sealed cabinet contains a gas chamber filled with insulating gas. The disconnecting switch is fixed inside the sealed cabinet via a grounding frame. The busbar assembly and the cable plug are respectively connected to the top and bottom of the sealed cabinet. The pressure monitoring component is used to detect the internal pressure of the gas chamber in real time and trigger a self-sealing mechanism. The pressure monitoring component is mounted on the sealed cabinet.
[0006] As an improvement of the ring network switchgear of this utility model, the gas box has a double-layer sealed structure, which includes a first-layer gas box and a second-layer gas box; the second-layer gas box is disposed inside the first-layer gas box; the second-layer gas box is filled with solid insulating material; and the insulating gas is filled between the first-layer gas box and the second-layer gas box.
[0007] Preferably, the insulating gas is SF6 gas, dry air, or nitrogen; or, the sealed cabinet is made of stainless steel.
[0008] As an improvement to the ring network switchgear of this utility model, the number of gas boxes is even, and the gas boxes are evenly arranged inside the sealed cabinet. As an improvement to the ring network switchgear of this utility model, the disconnecting switch, cable plug, and air pressure monitoring component are all modular structures.
[0009] As an improvement of the ring network switchgear of this utility model, the disconnecting switch includes an insulating upper main shaft, a disconnecting moving knife holder, a double-headed disconnecting moving knife plate, and upper / lower disconnecting contact seats; the double-headed disconnecting moving knife plate is disposed on the disconnecting moving knife holder; the upper / lower disconnecting contact seats include an upper disconnecting contact, a lower disconnecting contact, and a grounding stationary contact; the double-headed disconnecting moving knife plate rotates and cooperates with the upper disconnecting contact, the lower disconnecting contact, and the grounding stationary contact respectively to form a circuit opening / closing structure.
[0010] Preferably, the double-headed isolating moving blade plate is arranged at a 120° angle on the isolating moving blade holder.
[0011] Preferably, the grounding frame includes a first support plate, a second support plate, an insulating partition, and a grounding beam; the first support plate and the second support plate are arranged in parallel to respectively form the front and rear sides of the grounding frame; the insulating partition connects the left ends of both the first and second support plates to form the left side of the grounding frame; the grounding beam connects the right ends of both the first and second support plates to form the right side of the grounding frame; the insulating partition has a shaft hole for fixing the insulating upper spindle and a flange structure for fixing the isolating moving tool holder.
[0012] As an improvement of the ring network switchgear of this utility model, the air pressure monitoring component includes an air pressure sensor, a main control unit, a detection frame drive module, and an airbag component; the air pressure sensor is located in the air box and is electrically connected to the input terminal of the main control unit; the detection frame drive module is electrically connected to the output terminal of the main control unit; the detection frame drive module is also driven by the airbag component to seal the leak.
[0013] As an improvement to the ring network switchgear of this utility model, the main control unit is an ABB AC800M controller or a Siemens FCM7218-G3 controller.
[0014] Compared with the prior art, the present invention has at least the following technical effects:
[0015] The ring network switchgear of this utility model has an independent insulating gas filling space because its sealed cabinet is equipped with a gas box for filling insulating gas. Compared with the existing sealed cabinets that only use the cabinet itself as the gas box, even if the cabinet is damp or dirty, there will be no insulation breakdown or phase-to-phase short circuit. It has better insulation performance and can meet the insulation performance requirements of power distribution and control in harsh environments such as high altitude, humid heat, and severe cold. Attached Figure Description
[0016] Figure 1This is a schematic diagram of a preferred embodiment of the ring network switchgear of this utility model;
[0017] Figure 2 For this Figure 1 A cross-sectional view along the AA direction;
[0018] Figure 3 This is a circuit structure diagram of a preferred embodiment of the air pressure monitoring component of this utility model.
[0019] in, Figure 1 and Figure 2 The annotations in the attached figures are explained as follows:
[0020] 1. Sealed cabinet; 11. Gas box; 111. First-layer gas box; 112. Second-layer gas box; 12. Groove; 2. Busbar assembly; 3. Cable plug; 4. Air pressure monitoring assembly; 41. Air pressure sensor; 42. Main control unit; 5. Insulating gas; 6. Solid insulating material. Detailed Implementation
[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.
[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0023] In this invention, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0024] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.
[0025] The present invention will be further described in detail below with reference to the accompanying drawings.
[0026] like Figure 1 As shown, the ring network switchgear of this utility model includes a sealed cabinet 1, a disconnecting switch (not shown), a busbar assembly 2, a cable plug 3, and a pressure monitoring assembly 4; the sealed cabinet forms a gas box 11 filled with insulating gas 5 inside; the disconnecting switch is fixed inside the sealed cabinet by a grounding frame (not shown); the busbar assembly and the cable plug are respectively connected to the top and bottom of the sealed cabinet; the pressure monitoring assembly is used to detect the internal pressure of the gas box in real time and trigger a self-sealing mechanism, and the pressure monitoring assembly is installed on the sealed cabinet.
[0027] The ring network switchgear of this invention has an independent insulating gas filling space because its sealed cabinet is equipped with a gas box for filling insulating gas. Compared with the existing sealed cabinets that only use the cabinet itself as the gas box, even if the cabinet is damp or dirty, there will be no insulation breakdown or phase-to-phase short circuit. It has better insulation performance and meets the insulation performance requirements of power distribution and control in harsh environments such as high altitude, humid heat, and severe cold.
[0028] In some embodiments, such as Figure 2 As shown, the gas box has a double-layer sealed structure, which includes a first-layer gas box 111 and a second-layer gas box 112. The second-layer gas box is disposed inside the first-layer gas box. The second-layer gas box is filled with solid insulating material 6. The insulating gas is filled between the first-layer gas box and the second-layer gas box. The insulating gas is SF6 gas, dry air, or nitrogen.
[0029] The gas box of the ring network switchgear of this invention adopts a double-layer sealing structure, which is filled with solid insulating material and insulating gas (SF6 gas or dry air) respectively, so that the gas box pressure can be maintained at 0.14-0.4 bar and the annual leakage rate is ≤0.01%.
[0030] Moreover, the air box's body structure is made of 304 stainless steel plate with a thickness of 3mm, which is laser-cut and welded, thus enabling it to achieve an IP67 protection level and be briefly immersed in water up to 0.3 meters deep.
[0031] In some embodiments, the sealed cabinet is made of stainless steel, which can withstand the internal insulating gas pressure and external mechanical impact (such as during transportation, installation or accidental collision), ensuring that the cabinet does not deform or crack; moreover, even if an internal arc fault occurs during equipment operation, the stainless steel material of the sealed cabinet can withstand instantaneous high pressure and high temperature, preventing explosion or gas leakage and ensuring the safety of personnel and equipment.
[0032] In some embodiments, the number of air boxes is even, and the air boxes are evenly arranged inside the sealed cabinet, which not only further improves the insulation performance of the ring main switchgear of this utility model, but also improves the structural stability of the ring main switchgear and enhances the safety index of the ring main switchgear.
[0033] In some embodiments, the disconnect switch, cable plug, and barometric pressure monitoring component are all modular structures, which can conform to standardized interfaces and size specifications. Modules from different manufacturers or models are compatible and replaceable, reducing dependence on a single supplier. When a module (such as the disconnect switch contact or barometric pressure sensor) fails, the entire module can be replaced directly without on-site debugging or complex repairs, shortening downtime. Moreover, the modular structure (such as the cable plug) adopts a pre-assembled structure, requiring only interface connection during on-site installation, eliminating the need for individual wiring or calibration, significantly shortening the construction cycle. Furthermore, different modules can be installed and tested independently, enabling multi-station parallel operation and improving overall assembly efficiency. At the same time, key functions (such as the signal processing circuit of the barometric pressure monitoring component) are integrated within the module, requiring only simple connection during on-site operation, reducing the risk of failure due to wiring errors or improper parameter settings.
[0034] In some embodiments, the disconnecting switch includes an insulated upper spindle, a disconnecting moving blade holder, a double-headed disconnecting moving blade plate, and upper / lower disconnecting contact seats; the double-headed disconnecting moving blade plate is disposed on the disconnecting moving blade holder; the upper / lower disconnecting contact seats include an upper disconnecting contact, a lower disconnecting contact, and a grounding stationary contact; the double-headed disconnecting moving blade plate rotates and cooperates with the upper disconnecting contact, the lower disconnecting contact, and the grounding stationary contact respectively to form a circuit opening / closing structure.
[0035] The insulated upper spindle serves as the core support component, integrating the isolating moving knife holder, double-headed isolating moving knife plate, and upper / lower isolating contact seats. This reduces the number of scattered components, shrinks the equipment size, and meets the compact design requirements of fully insulated ring network switchgear. The upper / lower isolating contact seats are arranged in layers, and the double-headed isolating moving knife plate achieves synchronous opening and closing of the upper / lower contacts through rotation, avoiding the extra space occupied by horizontal layouts and improving the space utilization of the enclosure.
[0036] In some embodiments, the double-headed isolating moving blade plate is disposed on the isolating moving blade holder at a 120° angle. The 120° angle forms a symmetrical structure with an equilateral triangle layout, which evenly distributes the force borne by the moving blade plate during the opening and closing process to the three support points (the connection between the moving blade holder and the main shaft), avoiding deformation or loosening caused by unilateral force and extending the mechanical life. During power grid operation, the equipment may be subjected to stress due to short-circuit current impact or external vibration. The symmetrical structure can effectively offset the dynamic load and maintain stable contact between the moving blade plate and the contacts.
[0037] In some embodiments, the grounding frame includes a first support plate, a second support plate, an insulating partition, and a grounding beam; the first and second support plates are arranged in parallel to respectively form the front and rear sides of the grounding frame; the insulating partition connects the left ends of both the first and second support plates to form the left side of the grounding frame; the grounding beam connects the right ends of both the first and second support plates to form the right side of the grounding frame; the insulating partition has a shaft hole for fixing the upper insulating spindle and a flange structure for fixing the isolating moving knife holder. This structure significantly enhances the overall bending and torsional stiffness of the grounding frame, enabling it to withstand dynamic loads (e.g., opening and closing impact forces) and external mechanical stresses (e.g., transportation vibrations) during disconnector operation, preventing deformation or loosening.
[0038] In some embodiments, such as Figure 3 As shown, the air pressure monitoring component includes an air pressure sensor 41, a main control unit 42, a detection frame drive module, and an airbag component. The air pressure sensor is located in the air chamber and is electrically connected to the input terminal of the main control unit. The detection frame drive module is electrically connected to the output terminal of the main control unit. The detection frame drive module is also connected to the airbag component to seal leaks. The air pressure sensor is directly installed inside the air chamber, collecting pressure data of insulating gas or solid insulating medium in real time, avoiding measurement errors caused by changes in ambient temperature or sensor position deviation. Its accuracy can reach ±0.5%FS (full scale), meeting the requirements of IEC 60044-1 standard for air pressure monitoring of high-voltage equipment. The number of air pressure sensors corresponds one-to-one with the number of air chambers, the number of detection drive modules corresponds one-to-one with the number of air pressure sensors, and the number of airbag components corresponds one-to-one with the number of detection drive modules. Figure 3The diagram shows two pressure sensors, each corresponding to one of two air tanks. In other embodiments, the number of air tanks can be four, six, eight, ..., or any other even number; correspondingly, the number of pressure sensors can also be four, six, eight, ..., or any other even number; users can set different numbers of air tanks according to actual needs. For those skilled in the art, all of these should fall within the protection scope of this utility model's ring network switchgear. Moreover, as... Figure 3 As shown, the main control unit of the ring network switchgear of this utility model is located on the left side of the sealed cabinet. Correspondingly, the right side of the sealed cabinet is also provided with a groove 12 that matches the outer contour of the main control unit. Users can set different numbers of ring network switchgear according to actual usage needs, and install these different numbers of ring network switchgear through the matching relationship between the main control unit and the corresponding groove, so that the structure of the assembled ring network switchgear is more compact. Figure 3 The display shows the overall structure composed of three ring network switchgear units.
[0039] In some embodiments, the main control unit is an ABB AC800M controller or a Siemens FCM7218-G3 controller. Users can select different controller models as the main control unit according to different application scenarios, thereby further expanding the applicability of the ring network switchgear of this invention. When the main control unit is an ABB AC800M controller, it is suitable for complex industrial automation systems due to its high performance, high reliability, and modular design, supporting multiple communication protocols and expansion modules. When the main control unit is a Siemens FCM7218-G3 controller, it is suitable for scenarios with high reliability requirements because it features ground fault monitoring, a built-in clock, and a full-function network module mounting slot, supporting at least two days of operation during power failures.
[0040] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.
Claims
1. A ring network switchgear, characterized in that, It includes a sealed cabinet, a disconnecting switch, a busbar assembly, a cable plug, and a pressure monitoring component; the sealed cabinet forms an internal gas chamber filled with insulating gas; the disconnecting switch is fixed inside the sealed cabinet via a grounding frame; the busbar assembly and the cable plug are respectively connected to the top and bottom of the sealed cabinet; the pressure monitoring component is used to detect the internal pressure of the gas chamber in real time and trigger a self-sealing mechanism, and the pressure monitoring component is installed on the sealed cabinet.
2. The ring network switchgear according to claim 1, characterized in that, The gas box has a double-layer sealed structure, which includes a first-layer gas box and a second-layer gas box; the second-layer gas box is located inside the first-layer gas box; the second-layer gas box is filled with solid insulating material; and the insulating gas is filled between the first-layer gas box and the second-layer gas box.
3. The ring network switchgear according to claim 1 or 2, characterized in that, The insulating gas is SF6 gas, dry air, or nitrogen; or, the sealed cabinet is made of stainless steel.
4. The ring network switchgear according to claim 1 or 2, characterized in that, The number of air boxes is even, and the air boxes are evenly arranged inside the sealed cabinet.
5. The ring network switchgear according to claim 1 or 2, characterized in that, The disconnect switch, cable plug, and air pressure monitoring component are all modular structures.
6. The ring network switchgear according to claim 1 or 2, characterized in that, The disconnecting switch includes an insulated upper spindle, a disconnecting moving blade holder, a double-headed disconnecting moving blade plate, and upper / lower disconnecting contact seats; the double-headed disconnecting moving blade plate is disposed on the disconnecting moving blade holder; the upper / lower disconnecting contact seats include an upper disconnecting contact, a lower disconnecting contact, and a grounding stationary contact; the double-headed disconnecting moving blade plate rotates and cooperates with the upper disconnecting contact, the lower disconnecting contact, and the grounding stationary contact respectively to form a circuit opening / closing structure.
7. The ring network switchgear according to claim 6, characterized in that, The double-headed isolating moving blade plate is set at a 120° angle on the isolating moving blade holder.
8. The ring network switchgear according to claim 6, characterized in that, The grounding frame includes a first support plate, a second support plate, an insulating partition, and a grounding beam. The first and second support plates are arranged in parallel to form the front and rear sides of the grounding frame, respectively. The insulating partition connects the left ends of both the first and second support plates to form the left side of the grounding frame. The grounding beam connects the right ends of both the first and second support plates to form the right side of the grounding frame. The insulating partition has a shaft hole for fixing the insulating upper spindle and a flange structure for fixing the isolating moving tool holder.
9. The ring network switchgear according to claim 1 or 2, characterized in that, The air pressure monitoring component includes an air pressure sensor, a main control unit, a detection frame drive module, and an airbag component; the air pressure sensor is located in the air box and is electrically connected to the input terminal of the main control unit; the detection frame drive module is electrically connected to the output terminal of the main control unit; the detection frame drive module is also connected to the airbag component to seal the leak point.
10. The ring network switchgear according to claim 9, characterized in that, The main control unit is either an ABB AC800M controller or a Siemens FCM7218-G3 controller.