Current transformer for high-voltage switch cabinet
By designing a multi-layered protective structure and connecting components, the problems of single-material housing and inconvenient maintenance of high-voltage current transformers have been solved, enabling stable operation and convenient maintenance in different environments.
Patent Information
- Application Number
- CN202423159762.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The existing high-voltage current transformers have a single housing material, which makes them difficult to adapt to different working environments and inconvenient to maintain.
The integrated shell features a multi-layered protective structure, including a corrosion-resistant layer, a rubber sealing layer, a weather-resistant layer, a fiber layer, and a ceramic insulation layer. It also features a connecting assembly that enables stable connection and easy assembly/disassembly of the shell.
It improves the insulation, mechanical strength, corrosion resistance and sealing performance of the device, ensuring stable operation in various environments and simplifying the maintenance process.
Smart Images
Figure CN223552388U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of current transformer technology, specifically to a current transformer for high-voltage switchgear. Background Technology
[0002] High-voltage current transformers are critical devices in power systems used for measurement and protection. They primarily convert high currents into standard low currents (typically 1A or 5A) to facilitate the use of measuring instruments, relay protection devices, and control systems. They are designed to withstand the harsh conditions of high voltage and high current while maintaining high measurement accuracy and reliability. There are various types of high-voltage current transformers, including oil-immersed, dry-type, and gas-insulated types, suitable for different application scenarios. In power transmission and distribution systems, high-voltage current transformers are essential for ensuring the safe operation of the power grid. They monitor current levels, help prevent overloads and faults, and trigger protection mechanisms in the event of a fault.
[0003] Existing current transformers mostly have a one-piece casing made of a single material, making it difficult to comprehensively address the impact of different operating environments. Furthermore, maintenance of the devices is inconvenient, failing to meet current needs. Therefore, this application provides a current transformer for high-voltage switchgear. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model proposes a current transformer for high-voltage switchgear that has a simple structure, multiple layers of protection, and is easy to disassemble and maintain.
[0005] The technical solution of this utility model is implemented as follows:
[0006] A current transformer for a high-voltage switchgear includes a bottom shell and a top shell. The bottom shell and the top shell are covered by an integrated outer shell, which includes a corrosion-resistant layer, a rubber sealing layer, a weather-resistant layer, a fiber layer, and a ceramic insulating layer. The bottom shell has a bottom groove, and the top shell has a top groove. The bottom groove and the top groove are interlocked. A connecting assembly is provided on the outside of the bottom shell and the top shell. The connecting assembly includes an interlocking protrusion, an interlocking groove, a connecting groove, a threaded bolt, and a plug. A top mounting base is fixedly connected to the outside of the top shell.
[0007] Furthermore, a support bracket is fixedly connected inside the bottom shell and the top shell, and an internal component is movably connected to the outside of the support bracket. The ceramic insulating layer is disposed on the innermost layer and is in direct contact with the internal component. The fiber layer is attached to the outside of the ceramic insulating layer. The weather-resistant layer is disposed on the outside of the fiber layer. The rubber sealing layer is attached to the outside of the weather-resistant layer. The corrosion-resistant layer is coated on the outside of the rubber sealing layer and completely covers the bottom shell and the top shell.
[0008] Furthermore, a fixing plate is fixedly connected to the outside of the bottom shell, the fixing plate has a central groove in the middle, and mounting grooves are provided on both sides of the fixing plate.
[0009] Furthermore, both the bottom shell and the top shell are fixedly connected to the outside of side lugs. There are two sets of side lugs, which are distributed on the outside of the bottom shell and the top shell respectively. The side lugs are distributed on both sides when the bottom shell and the top shell are installed.
[0010] Furthermore, the fitting protrusion is fixedly connected to the outside of the bottom shell, the fitting groove is opened inside the top shell, the connecting groove is opened outside the bottom shell and the top shell, the threaded bolt is threadedly connected inside the connecting groove, and the plug is movably connected inside the side connecting lug.
[0011] Furthermore, there are multiple sets of the interlocking protrusions symmetrically distributed outside the bottom groove, the number of the interlocking grooves is the same as the number of the interlocking protrusions, and the interlocking protrusions are interlocked with the interlocking grooves.
[0012] Furthermore, there are two sets of connecting grooves symmetrically distributed on the outside of the bottom shell and the top shell, and the connecting grooves on the outside of the bottom shell and the top shell are parallel to each other and interconnected.
[0013] Furthermore, the central groove and the top mounting base are interconnected, and the central groove and the top mounting base are connected to each other by bolts.
[0014] This utility model has the following beneficial effects:
[0015] 1. By setting up a comprehensive outer shell, the insulation, mechanical strength, corrosion resistance, weather resistance and sealing performance of the device are comprehensively improved during operation, ensuring that the internal functional components of the device can operate under various environmental conditions.
[0016] 2. By setting up connection components, the devices can be interconnected to make them more stable inside the high-voltage switchgear, while also facilitating quick disassembly, maintenance, and installation, thus improving maintenance efficiency. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall appearance of this utility model;
[0018] Figure 2 This is a utility model Figure 1 Internal structure diagram;
[0019] Figure 3 This is an exploded view of the internal structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the internal structure of the bottom shell of this utility model;
[0021] Figure 5 This is a schematic diagram of the internal structure of the top shell of this utility model.
[0022] The components are as follows: 1. Bottom shell; 101. Bottom groove; 102. Fitting protrusion; 103. Support bracket; 104. Side connecting lug; 105. Fixing plate; 106. Center groove; 107. Mounting groove; 2. Top shell; 201. Top groove; 202. Fitting groove; 203. Connecting groove; 204. Top mounting base; 3. Integrated outer shell; 301. Corrosion resistant layer; 302. Rubber sealing layer; 303. Weather resistant layer; 304. Fiber layer; 305. Ceramic insulation layer; 4. Internal components; 5. Threaded bolt; 6. Insert bolt. Detailed Implementation
[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0024] Example 1
[0025] Please see Figures 1 to 5 As shown, the present invention provides a current transformer for a high-voltage switchgear, comprising a bottom shell 1 and a top shell 2. The bottom shell 1 and the top shell 2 are covered by a composite shell 3, which includes a corrosion-resistant layer 301, a rubber sealing layer 302, a weather-resistant layer 303, a fiber layer 304, and a ceramic insulating layer 305. The bottom shell 1 has a bottom groove 101 on its exterior, and the top shell 2 has a top groove 201 on its exterior. The bottom groove 101 and the top groove 201 are interlocked and connected. The bottom shell 1 and the top shell 2 are provided with a connecting assembly, which includes an interlocking protrusion 102, an interlocking groove 202, a connecting groove 203, a threaded bolt 5, and a plug 6. The top shell 2 is fixedly connected to a top mounting base 204.
[0026] Specifically, during the installation of the device, the bottom shell 1 and the top shell 2 are first fitted together and connected, and the bottom groove 101 and the top groove 201 complete the sealing connection. During this process, the fitting protrusion 102 and the fitting groove 202 are fitted together and connected. Then, the threaded bolt 5 is screwed into the connecting groove 203 to complete the side connection. At the same time, the top mounting base 204 and the center groove 106 are aligned and connected to each other. Finally, the plug 6 is inserted into both of them, thus completing the assembly of the device. Then, the device can be fixed in the high-voltage switchgear by the fixing plate 105.
[0027] Example 2
[0028] Please see Figures 1 to 5As shown in Embodiment 1, a support bracket 103 is fixedly connected inside the bottom shell 1 and the top shell 2. An internal component 4 is movably connected to the outside of the support bracket 103. A ceramic insulating layer 305 is disposed in the innermost layer and is in direct contact with the internal component 4. A fiber layer 304 is attached to the outside of the ceramic insulating layer 305. A weather-resistant layer 303 is disposed on the outside of the fiber layer 304. A rubber sealing layer 302 is attached to the outside of the weather-resistant layer 303. A corrosion-resistant layer 301 is coated on the outside of the rubber sealing layer 302 and covers the bottom shell 1 and the top shell 2 as a whole.
[0029] A fixing plate 105 is fixedly connected to the outside of the bottom shell 1. A central groove 106 is provided in the middle of the fixing plate 105. Mounting grooves 107 are provided on both sides of the fixing plate 105. Side connecting ears 104 are fixedly connected to the outside of both the bottom shell 1 and the top shell 2. There are two sets of side connecting ears 104, which are distributed on the outside of the bottom shell 1 and the top shell 2 respectively. The side connecting ears 104 are distributed on both sides when the bottom shell 1 and the top shell 2 are installed.
[0030] By making the above settings, during the operation of the device, the ceramic insulation layer 305 blocks the induced current inside the device and provides basic structural support for the device. The fiber layer 304 covers the ceramic insulation layer 305, reinforces its overall shape, and enhances its mechanical strength. The weather-resistant layer 303 separates the two sides of the integrated outer shell 3, reducing the impact of external climate on the device. The rubber sealing layer 302 enhances the overall sealing effect of the device. The corrosion-resistant layer 301 covers the exposed layers of the device and extends the service life of the device.
[0031] Example 3
[0032] Please see Figures 1 to 5 As shown in Embodiment 2, the fitting protrusion 102 is fixedly connected to the outside of the bottom shell 1, the fitting groove 202 is opened inside the top shell 2, the connecting groove 203 is opened outside the bottom shell 1 and the top shell 2, the threaded bolt 5 is threadedly connected inside the connecting groove 203, and the plug 6 is movably connected inside the side connecting lug 104. There are multiple sets of fitting protrusions 102 symmetrically distributed outside the bottom groove 101, the number of fitting grooves 202 is the same as the number of fitting protrusions 102, the fitting protrusions 102 and the fitting grooves 202 are fitted and connected, there are two sets of connecting grooves 203 symmetrically distributed outside the bottom shell 1 and the top shell 2, the connecting grooves 203 outside the bottom shell 1 and the top shell 2 are parallel to each other and interconnected, the central groove 106 is interconnected with the top mounting base 204, and the central groove 106 and the top mounting base 204 are interconnected by the plug 6.
[0033] By making the above settings, when multiple devices are installed, after aligning the side connecting ears 104 on the outside of adjacent devices with each other, the plug 6 is inserted between the side connecting ears 104. The two side connecting ears 104 on both sides are connected and fixed by the plug 6. When encountering external force shaking, the devices are connected as a whole, reducing the shaking amplitude of the devices and thus reducing damage to the devices.
[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A current transformer for a high-voltage switchgear, comprising a bottom shell (1) and a top shell (2), characterized in that, The bottom shell (1) and the top shell (2) are covered by a composite shell (3), which includes a corrosion-resistant layer (301), a rubber sealing layer (302), a weather-resistant layer (303), a fiber layer (304), and a ceramic insulating layer (305). The bottom shell (1) has a bottom groove (101) on its outside, and the top shell (2) has a top groove (201) on its outside. The bottom groove (101) and the top groove (201) are interlocked. The bottom shell (1) and the top shell (2) are provided with connecting components on their outside. The connecting components include an interlocking protrusion (102), an interlocking groove (202), a connecting groove (203), a threaded bolt (5), and a plug (6). The top shell (2) is fixedly connected to a top mounting base (204).
2. A current transformer for high-voltage switchgear according to claim 1, characterized in that, The bottom shell (1) and top shell (2) are fixedly connected to a support bracket (103) inside. The support bracket (103) is movably connected to an internal component (4) outside. The ceramic insulation layer (305) is disposed in the innermost layer and is in direct contact with the internal component (4). The fiber layer (304) is attached to the outside of the ceramic insulation layer (305). The weather-resistant layer (303) is disposed on the outside of the fiber layer (304). The rubber sealing layer (302) is attached to the outside of the weather-resistant layer (303). The corrosion-resistant layer (301) is coated on the outside of the rubber sealing layer (302) and covers the bottom shell (1) and top shell (2) as a whole.
3. A current transformer for high-voltage switchgear according to claim 1, characterized in that, The bottom shell (1) is fixedly connected to a fixing plate (105). A central groove (106) is provided in the middle of the fixing plate (105), and mounting grooves (107) are provided on both sides of the fixing plate (105).
4. A current transformer for high-voltage switchgear according to claim 1, characterized in that, Both the bottom shell (1) and the top shell (2) are fixedly connected to the outside of the side connecting ears (104). There are two sets of side connecting ears (104) and they are respectively distributed on the outside of the bottom shell (1) and the top shell (2). The side connecting ears (104) are distributed on both sides when the bottom shell (1) and the top shell (2) are installed.
5. A current transformer for a high-voltage switchgear according to claim 1, characterized in that, The fitting protrusion (102) is fixedly connected to the outside of the bottom shell (1), the fitting groove (202) is opened inside the top shell (2), the connecting groove (203) is opened outside the bottom shell (1) and the top shell (2), the threaded bolt (5) is threadedly connected inside the connecting groove (203), and the plug (6) is movably connected inside the side connecting lug (104).
6. A current transformer for a high-voltage switchgear according to claim 5, characterized in that, The number of the fitting protrusions (102) is multiple and symmetrically distributed outside the bottom groove (101). The number of the fitting grooves (202) is the same as the number of the fitting protrusions (102). The fitting protrusions (102) are fitted and connected to the fitting grooves (202).
7. A current transformer for a high-voltage switchgear according to claim 5, characterized in that, There are two sets of connecting grooves (203) symmetrically distributed on the outside of the bottom shell (1) and the top shell (2). The connecting grooves (203) on the outside of the bottom shell (1) and the top shell (2) are parallel to each other and interconnected.
8. A current transformer for a high-voltage switchgear according to claim 3, characterized in that, The central groove (106) and the top mounting base (204) are interconnected, and the central groove (106) and the top mounting base (204) are connected to each other by a bolt (6).