Stable current transformer device for GIS (Gas Insulated Switchgear)
Through innovative design of the housing and limiting structure, the safety hazards of current transformers when installed outdoors are solved, achieving stable fixation and wire protection, thereby improving the safety and service life of the equipment.
Patent Information
- Application Number
- CN202422650656.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-10-31
AI Technical Summary
Existing current transformers installed outdoors pose safety hazards. The screws are prone to rusting or loosening, and the direct wrapping of wires can cause the insulation layer to melt due to the heat generated by the transformer.
It adopts a combination structure of outer shell, locking block, stabilizing plate, limiting shell, limiting block, push rod, spring, threaded tube and threaded wire. The locking block and the limiting block cooperate to prevent the outer shell from loosening by using spring energy storage, and the threaded connection increases the stability. The wires are protected by the limiting frame to avoid direct contact with the current transformer.
Ensure the current transformer is securely fixed to prevent it from falling or loosening, and prevent the wire insulation from melting due to excessive temperature, thereby improving the safety and service life of the equipment.
Smart Images
Figure CN223486789U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of stable current transformers for GIS, and particularly relates to a stable current transformer device for GIS. Background Technology
[0002] Gas-insulated switchgear (GIS) consists of circuit breakers, disconnecting switches, grounding switches, current transformers, voltage transformers, surge arresters, busbars, connectors, and outgoing terminals. All of these devices or components are enclosed in a metal-grounded enclosure filled with SF6 insulating gas at a certain pressure, hence it is also called SF6 fully enclosed switchgear.
[0003] Most existing current transformers are installed outdoors and are fixed with only two screws. Due to long-term use, the screws are prone to rust or loosening, and there are no safety measures to protect them. In addition, the current method of winding the wires directly onto the transformer can easily melt the outer insulation layer of the wires if the transformer gets hot, thus posing a certain safety hazard.
[0004] To address this issue, we propose a stable current transformer device for GIS. Utility Model Content
[0005] The purpose of this application is to address the safety hazards associated with the installation of existing current transformers outdoors, and to propose a stable current transformer device for GIS.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A stable current transformer device for GIS includes a housing. A locking block is fixedly connected to the bottom surface of the housing. A stabilizing plate is fixedly connected to the outer surface of the locking block. A limiting shell is provided below the stabilizing plate. The upper surface of the limiting shell contacts the bottom surface of the stabilizing plate. Two limiting blocks are provided inside the limiting shell. A push rod is fixedly connected to the front and back of each limiting block. The ends of each set of push rods that are far apart from each other penetrate the limiting shell and extend to the outside of the limiting shell. Two springs are fixedly connected to the sides of the two limiting blocks that are far apart from each limiting block. The ends of each spring that are far apart from the limiting block are fixedly connected to the limiting shell. Two threaded tubes are fixedly connected to the inner wall of the limiting shell. Two threaded wires are provided above the stabilizing plate. The bottom end of each threaded wire penetrates the stabilizing plate and is threaded to the inner wall of the threaded tube.
[0008] Preferably, four bolts are provided on the outer side of the limiting shell, and the end of each bolt near the limiting shell is threaded to the inner wall of the limiting shell.
[0009] Preferably, an iron core is provided inside the outer shell, and the outer surface of the iron core is fixedly connected to the inner wall of the outer shell.
[0010] Preferably, two secondary wires are fixedly connected to the outer surface of the iron core, and each of the secondary wires is fixedly connected to the inner wall of the outer shell.
[0011] Preferably, two screws are provided on the outer side of the housing, and the outer surface of each screw is threaded to the inner wall of the housing.
[0012] Preferably, a transparent protective cover is rotatably connected to the front of the housing, and limit frames are fixedly connected to both the front and back of the housing.
[0013] Preferably, the inner wall of the limiting frame is fitted with five wires, each of which is located inside the outer casing.
[0014] In summary, the technical effects and advantages of this application are as follows:
[0015] By employing a combination of a housing, locking pin, stabilizing plate, limiting shell, limiting block, push rod, spring, threaded tube, and threaded wire, the current transformer can be stably fixed on top of the limiting shell, preventing it from falling off. When the locking pin is pressed down, it pushes the limiting blocks on both sides to the sides. The spring stores and stores force; once the locking pin has passed the two limiting blocks, the springs on both sides push the limiting blocks out to block them, providing a protective layer. This ensures the housing won't fall off if the external screws loosen, thus avoiding safety hazards. The threaded connection between the threaded wire and the threaded tube allows the stabilizing plate to be installed on top of the limiting shell, further increasing the stability of the current transformer. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the outer shell of this utility model;
[0017] Figure 2 This is a rear-view three-dimensional structural diagram of the limiting shell of this utility model;
[0018] Figure 3 This is a three-dimensional structural diagram of the limiting shell of this utility model;
[0019] Figure 4 This is a three-dimensional structural diagram of the iron core of this utility model.
[0020] In the diagram: 1. Outer shell; 2. Locking pin; 3. Stabilizing plate; 4. Limiting shell; 5. Limiting block; 6. Push rod; 7. Spring; 8. Threaded tube; 9. Threaded wire; 10. Bolt; 11. Iron core; 12. Secondary conductor; 13. Screw; 14. Transparent protective cover; 15. Limiting frame; 16. Wire. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0022] Reference Figure 1-4 A stable current transformer device for GIS includes a housing 1, a locking block 2 fixedly connected to the bottom surface of the housing 1, a stabilizing plate 3 fixedly connected to the outer surface of the locking block 2, and four bolts 10 provided on the outer side of a limiting shell 4. The end of each bolt 10 near the limiting shell 4 is threaded to the inner wall of the limiting shell 4. The four bolts 10 are used to fasten the limiting shell 4 and ensure that the limiting shell 4 is not prone to shaking.
[0023] A limiting shell 4 is provided below the stabilizing plate 3. The upper surface of the limiting shell 4 is in contact with the bottom surface of the stabilizing plate 3. An iron core 11 is provided inside the outer shell 1. The outer surface of the iron core 11 is fixedly connected to the inner wall of the outer shell 1. The iron core 11 plays the role of stabilizing the current. The iron core 11 is protected by the outer shell 1, which can ensure the service life of the iron core 11.
[0024] The limiting shell 4 has two limiting blocks 5 inside. Each limiting block 5 has a push rod 6 fixedly connected to its front and back. The outer surface of the iron core 11 has two secondary wires 12 fixedly connected. Each secondary wire 12 is fixedly connected to the inner wall of the shell 1. The secondary wire 12, i.e. the primary winding, should be connected in series with the circuit being tested, while the secondary winding is connected in series with all instrument loads. According to the magnitude of the current being tested, an appropriate transformation ratio should be selected; otherwise, the error will increase. At the same time, one end of the secondary side must be grounded to prevent the high voltage on the primary side from entering the low voltage side of the secondary side if the insulation is damaged, thus avoiding personal injury and equipment accidents.
[0025] Each push rod 6 has one end that is far apart from the other, which passes through the limiting shell 4 and extends to the outside of the limiting shell 4. Two springs 7 are fixedly connected to the two sides of the limiting blocks 5 that are far apart from each other. Two screws 13 are provided on the outside of the outer shell 1. The outer surface of each screw 13 is threaded to the inner wall of the outer shell 1. The two screws 13 are used to facilitate the connection of external wires, which achieves the effect of convenient connection.
[0026] Each spring 7 is fixedly connected to the end away from the limiting block 5. Two threaded tubes 8 are fixedly connected to the inner wall of the limiting shell 4. A transparent protective cover 14 is rotatably connected to the front of the outer shell 1. Limiting brackets 15 are fixedly connected to both the front and back of the outer shell 1. The transparent protective cover 14 is used to protect the two screws 13 from getting wet and rusting, thereby increasing the overall service life of the equipment. The two limiting brackets 15 can limit the winding of the circuit, avoiding direct contact with the current transformer and preventing the insulation layer of the circuit from melting due to overheating.
[0027] Two threaded wires 9 are provided on the top of the stabilizing plate 3. The bottom end of each threaded wire 9 passes through the stabilizing plate 3 and is threaded to the inner wall of the threaded tube 8. Five wires 16 are clamped to the inner wall of the limiting frame 15. Each wire 16 is located inside the outer shell 1. The five wires 16 are wrapped around the outer shell 1 five times and can be installed by oneself according to the specific situation.
[0028] The working principle of this utility model is as follows: When in use, first insert the outer shell 1 into the mounting hole of the limiting shell 4. The outer shell 1 drives the locking block 2 to press down. At this time, the locking block 2 pushes the two limiting blocks 5 to tighten on both sides. The two limiting blocks 5 squeeze the spring 7. When the locking block 2 passes the limiting blocks 5, the spring 7 will push the two limiting blocks 5 out, which can block the locking block 2 and ensure that the locking block 2 is not easy to shake. At this time, by using the threaded connection between the threaded wire 9 and the threaded tube 8, the stabilizing plate 3 can be fixed on the upper part of the limiting shell 4, further increasing the stability of the outer shell 1.
[0029] During installation, the wire 16 is wound around the corresponding number of times as required and secured inside the two limit brackets 15 to ensure that the wire 16 is inside the outer casing 1, preventing problems such as the insulation layer of the wire 16 melting due to the heat of the outer casing 1.
[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A stable current transformer device for GIS, comprising a housing (1), characterized in that: A locking block (2) is fixedly connected to the bottom surface of the outer shell (1), and a stabilizing plate (3) is fixedly connected to the outer surface of the locking block (2). A limiting shell (4) is provided below the stabilizing plate (3). The upper surface of the limiting shell (4) is in contact with the bottom surface of the stabilizing plate (3). Two limiting blocks (5) are provided inside the limiting shell (4). A push rod (6) is fixedly connected to the front and back of each limiting block (5). The ends of each set of push rods (6) that are far apart from each other penetrate the limiting shell. 4) and extends to the outside of the limiting shell (4). Two springs (7) are fixedly connected to the opposite sides of the two limiting blocks (5). The end of each spring (7) away from the limiting block (5) is fixedly connected to the limiting shell (4). Two threaded tubes (8) are fixedly connected to the inner wall of the limiting shell (4). Two threaded wires (9) are provided above the stabilizing plate (3). The bottom end of each threaded wire (9) passes through the stabilizing plate (3) and is threadedly connected to the inner wall of the threaded tube (8).
2. The stable current transformer device for GIS according to claim 1, characterized in that: Four bolts (10) are provided on the outer side of the limiting shell (4), and the end of each bolt (10) near the limiting shell (4) is threaded to the inner wall of the limiting shell (4).
3. The stable current transformer device for GIS according to claim 1, characterized in that: The outer shell (1) is provided with an iron core (11) inside, and the outer surface of the iron core (11) is fixedly connected to the inner wall of the outer shell (1).
4. A stable current transformer device for GIS according to claim 3, characterized in that: Two secondary conductors (12) are fixedly connected to the outer surface of the iron core (11), and each of the secondary conductors (12) is fixedly connected to the inner wall of the outer shell (1).
5. A stable current transformer device for GIS according to claim 1, characterized in that: Two screws (13) are provided on the outer side of the outer shell (1), and the outer surface of each screw (13) is threaded to the inner wall of the outer shell (1).
6. A stable current transformer device for GIS according to claim 1, characterized in that: A transparent protective cover (14) is rotatably connected to the front of the outer shell (1), and a limit frame (15) is fixedly connected to both the front and back of the outer shell (1).
7. A stable current transformer device for GIS according to claim 6, characterized in that: The inner wall of the limiting frame (15) is fitted with five wires (16), each of which is located inside the outer shell (1).