A scalable high voltage knife switch shield device

Abstract

This invention relates to a retractable high-voltage disconnect switch shielding device, belonging to the field of live-line working protection devices for power equipment. The device includes a disconnect switch body and a retractable shield. The retractable shield employs a pleated structure to extend and deform along the extension direction of the disconnect switch body to accommodate disconnect switches of different sizes. It also includes a modular insulating thermosensitive layer and a press-type magnetic locking module. The modular insulating thermosensitive layer comprises multiple detachably connected insulating units, each with a dielectric strength corresponding to a different voltage level. An insulating thermosensitive color-changing layer is provided on the side of each insulating unit, providing a warning through color change caused by heat sensitivity. The press-type magnetic locking module includes an array of permanent magnets and a magnetic guide plate evenly distributed on the side edges of two mating insulating units, achieving magnetic adsorption and fixation through pressing. This invention has a simple structure, strong adaptability, and can effectively protect high-voltage disconnect switches, improving the operational safety of power equipment.

Description

Technical Field

[0001] This invention relates to the field of protective devices for live-line work on power equipment, and more specifically to a retractable high-voltage switch shielding device for use in high-voltage power systems. Background Technology

[0002] High-voltage disconnectors, as important switching equipment in power systems, are widely used in power system control and protection. To ensure the safety of operators and the normal operation of equipment, high-voltage disconnectors usually need to be equipped with appropriate insulation shielding devices. Currently, the insulation devices commonly found in the market for high-voltage disconnectors mainly adopt a fixed structure design. For example, Chinese patent document CN205751981U discloses a high-voltage disconnector insulation device. This device uses two interlocking insulating half-enclosures, which are detachably combined into an insulating cover with an open bottom through a snap-fit ​​and plug-in part, thereby covering the high-voltage disconnector and achieving full insulation shielding of the live parts.

[0003] With the development of power systems, the functional requirements for high-voltage disconnector insulation devices are constantly increasing. CN116153702A discloses a transparent, visible, high-temperature automatically detachable insulation sleeve. This sleeve is made of transparent insulating material, coated with a heat-sensitive color strip on the outer surface, and equipped with a high-temperature melting buckle, which can automatically detach under high temperatures, improving safety. CN105405700B discloses a new type of power disconnector, which includes a disconnector body and an external protective cover. The protective cover houses an infrared temperature sensor, a microcontroller, an alarm, and a wireless transmitter, enabling temperature monitoring and improving operational safety.

[0004] Regarding enclosed design, CN113363106A discloses a novel high-voltage enclosed disconnector, which includes a base, an insulator, and a first and second enclosed cavity located above the insulator, achieving a fully enclosed structure for dynamic equipment with no exposed live parts. CN106783338A discloses an intelligently monitored disconnector, which, through its inner and outer layer structure and helical shock-absorbing springs, possesses excellent waterproof and shock-absorbing performance, ensuring the safe and stable operation of the equipment.

[0005] However, existing high-voltage disconnector shielding enclosures still have some technical problems: First, most existing high-voltage disconnector shielding enclosures are fixed structures, unable to adapt to the size variations of different disconnector models, requiring customized enclosures for each model. This not only increases maintenance costs but also brings inconvenience in storage and replacement. Second, the installation process of traditional enclosures is cumbersome and inconvenient, affecting work efficiency. Third, the insulation performance of existing insulating enclosures is usually a fixed design, unable to flexibly configure insulation strength according to different voltage levels, lacking adaptability. Finally, most traditional enclosures lack environmental sensing capabilities, unable to monitor the operating environment in real time and dynamically adjust protection strategies according to environmental changes, making it difficult to meet the needs of smart grids.

[0006] Therefore, there is an urgent need for a high-voltage disconnector shielding device with a scalable structure, convenient installation, configurable insulation performance, and environmental monitoring function to solve the above-mentioned technical problems. Summary of the Invention

[0007] The technical problem to be solved by this invention is to provide a retractable high-voltage switch shielding device, which addresses the technical problems of traditional high-voltage switch shielding covers, such as fixed structure that cannot adapt to size changes of different switch models, cumbersome installation and inconvenient operation, inflexible insulation that cannot flexibly configure insulation strength according to different voltage levels, and lack of environmental perception capabilities that cannot monitor the operating environment in real time and dynamically adjust protection strategies.

[0008] The technical solution adopted by the present invention to solve its technical problem is: to provide a retractable high-voltage switch shielding device, including a switch body and a retractable shield, wherein: the retractable shield adopts a pleated structure to extend and deform along the extension direction of the switch body to adapt to different sizes of switches.

[0009] Preferably, the retractable cover includes a modular insulating thermosensitive layer containing multiple sets of detachably connected insulating units. The dielectric strength of each unit corresponds to a different voltage level. The sides of the multiple sets of insulating units are provided with an insulating thermosensitive color-changing layer, which provides an alert by changing color when heated.

[0010] Furthermore, the retractable cover includes a press-type magnetic locking module, comprising an array of permanent magnets and a magnetic guide plate evenly distributed on the side edges of the two mating insulating units, which achieve magnetic adsorption and fixation by pressing.

[0011] Optionally, the pleated structure of the retractable cover is a folded Accordion structure.

[0012] Preferably, the multiple sets of insulating units include a knife switch mounting slot insulating base, and the two sides of the knife switch mounting slot insulating base are respectively provided with a terminal block insulating base one and a terminal block insulating base two.

[0013] Furthermore, the permanent magnet array of the press-type magnetic locking module adopts neodymium iron boron magnets, with a surface magnetic field strength ≥480mT and an installation / removal operation time ≤30 seconds.

[0014] Optionally, an environmental monitoring system is installed at the inner edge of the insulating base of the switch mounting slot, including an integrated temperature and humidity sensor and a control unit. The control unit transmits data based on the sensor data. The control unit is a microcontroller and can transmit signals to a mobile APP via Bluetooth.

[0015] Preferably, the insulating unit is silicone rubber, EPDM, or PTFE, which has high insulation strength and weather resistance.

[0016] Furthermore, the insulating thermochromic layer is made of a fluoroplastic-based thermochromic composite material with a color-changing response film bonded to the sides of multiple insulating units. Specifically, it consists of fluoroplastics combined with microencapsulated spirocyclic compounds and alumina fillers. The fluoroplastics provide wide temperature range stability and high insulation from -60℃ to 260℃; the microencapsulated spirocyclic compounds or bisanthrone organic pigments achieve a reversible color-changing response from 60℃ to 180℃; and the thermal conductivity enhancer, alumina, accelerates temperature conduction to ensure real-time response.

[0017] Optionally, the switch body is installed in the insulating base of the switch mounting groove, and an insulating column is connected to the lower end of the switch body, with a base provided at the lower end of the insulating column.

[0018] The beneficial effects of this invention are as follows: Compared with the prior art, this invention, through its scalable structural design, allows the enclosure to adapt to the size changes of different models of disconnect switches, enabling a single model to cover multiple scenarios and reducing inventory and replacement costs; combined with modular insulation layer units, the insulation strength can be flexibly configured according to different voltage levels, allowing users to quickly replace insulation modules according to the power grid level, achieving customized insulation protection; the heat-sensitive color-changing insulation layer provides an alert and warning function through heat-sensitive color change; the use of a press-type magnetic locking module enables rapid installation and disassembly of the enclosure, requiring no tools and taking ≤30 seconds, significantly improving operation and maintenance efficiency; and the integration of an environmental monitoring system enables real-time perception of the operating environment and dynamic adjustment of protection strategies, improving safety and intelligence levels. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the retractable knife switch shielding device of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the retractable cover of the present invention.

[0021] Figure 3 This is a structural schematic diagram of the retractable knife gate shielding device of the present invention from another perspective.

[0022] Figure 4 for Figure 3 A structural schematic diagram of the retractable knife switch shielding device from another perspective.

[0023] Figure 5 This is a front view of the retractable knife gate shielding device of the present invention.

[0024] Figure 6 This is a top view of the retractable knife gate shielding device of the present invention.

[0025] Figure 7 This is a schematic diagram of the mounting base of the retractable knife switch shielding device of the present invention.

[0026] Figure 8 This is a schematic diagram of a press-type magnetic locking module.

[0027] In the diagram: 1-Knife switch body, 2-Retractable cover, 3-Modular insulating thermosensitive layer, 31-Insulation unit, 310-Knife switch mounting slot insulating base, 311-Terminal insulating base one, 312-Terminal insulating base two, 32-Insulating thermosensitive color-changing layer, 4-Press-type magnetic locking module, 41-Permanent magnet array, 42-Magnetic guide plate, 5-Environmental monitoring system, 51-Temperature and humidity sensor, 52-Control unit, 6-Insulating column, 7-Base. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0029] like Figures 1 to 8 As shown, a retractable high-voltage switch shielding device includes a switch body 1 and a retractable shield 2.

[0030] The retractable cover 2 has a pleated structure, which is a folded Accordion structure that can extend and deform along the extension direction of the switch body 1 to adapt to different sizes of switches. The retractable cover 2 includes a modular insulating thermal layer 3 and a press-type magnetic locking module 4.

[0031] The modular insulating thermosensitive layer 3 comprises multiple detachably connected insulating units 31. Each insulating unit 31 has a dielectric strength corresponding to a different voltage level, enabling the device to be used with high-voltage disconnect switches of varying voltage levels. An insulating thermosensitive color-changing layer 32 is provided on the side of each insulating unit 31. This layer is a color-changing responsive film made of fluoroplastic-based thermosensitive color-changing composite material and is bonded to the side of the insulating units 31. When the temperature rises abnormally, the insulating thermosensitive color-changing layer 32 activates a color change signal through thermal sensitivity, providing an alert and facilitating timely detection of potential safety hazards by staff.

[0032] The multiple sets of insulating units 31 include a knife switch mounting slot insulating base 310. A terminal block insulating base 311 and a terminal block insulating base 312 are respectively provided on both sides of the knife switch mounting slot insulating base 310. The knife switch body 1 is installed inside the knife switch mounting slot insulating base 310. An insulating post 6 is connected to the lower end of the knife switch body 1, and a base 7 is provided at the lower end of the insulating post 6. Figure 7 As shown, this structural design allows the entire device to be securely installed in the workplace.

[0033] The insulation unit 31 is made of a material with high insulation strength and weather resistance, such as silicone rubber, EPDM or PTFE. These materials have excellent electrical insulation properties and environmental adaptability, and can maintain stable insulation performance in various harsh environments.

[0034] The press-type magnetic locking module 4 includes a permanent magnet array 41 and a magnetic guide plate 42, which are evenly distributed on the side edges of two mating insulating units 31, respectively. Figure 8 As shown, the permanent magnet array 41 uses neodymium iron boron magnets with a surface magnetic field strength ≥480mT. Magnetic adsorption and fixation are achieved through pressing, ensuring a tight fit between the insulating units 31 and preventing high-voltage arc penetration. This magnetic locking design facilitates rapid installation and disassembly of the device, improving work efficiency and safety.

[0035] An environmental monitoring system 5 is installed at the inner edge of the insulating base 310 of the switch mounting slot. The environmental monitoring system 5 includes an integrated temperature and humidity sensor 51 and a control unit 52. The integrated temperature and humidity sensor 51 monitors the temperature and humidity changes inside the device in real time. The control unit 52 transmits the data based on the sensor data. When the environmental parameters exceed the preset range, the control unit 52 will issue an alarm signal to remind the staff to take appropriate measures.

[0036] In practical use, the working principle of the retractable high-voltage disconnect switch shielding device is as follows: First, the disconnect switch body 1 is installed in the insulating base 310 of the disconnect switch mounting slot. Then, the length of the retractable shield 2 is adjusted according to the actual size of the disconnect switch. After adjustment, the adjacent insulating units 31 are firmly locked by the press-type magnetic locking module 4. The environmental monitoring system 5 continuously monitors the internal environmental parameters of the device, and the insulating thermosensitive color-changing layer 32 provides visual alerts for abnormal temperatures.

[0037] This retractable high-voltage disconnector shielding device, through its modular design and retractable structure, solves the problem that traditional fixed-size shields cannot adapt to different specifications of disconnectors. The combination of the insulating thermosensitive color-changing layer 32 and the environmental monitoring system 5 enables real-time monitoring of the device's operating status. The push-button magnetic locking module 4 greatly improves the device's ease of installation and sealing performance. The overall design balances safety, adaptability, and convenience, providing effective protection for the safe operation of high-voltage power equipment.

[0038] In the description of this invention, it should be noted that the terms "upper," "lower," 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 the invention and simplifying the description, and do not indicate or imply that the device or element 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 the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0039] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention described herein.

Claims

1. A retractable high-voltage disconnect switch shielding device, comprising a disconnect switch body (1); characterized in that, The retractable cover (2) has a pleated structure, which is stretched and deformed along the extension direction of the knife switch body (1) to adapt to knife switches of different sizes. It includes: The modular insulating thermosensitive layer (3) includes multiple sets of detachably connected insulating units (31), each unit having a dielectric strength corresponding to a different voltage level. The multiple sets of insulating units (31) are provided with an insulating thermosensitive color-changing layer (32) on their side. The insulating thermosensitive color-changing layer (32) provides a reminder by changing color through heat sensitivity. The press-type magnetic locking module (4) includes a permanent magnet array (41) and a magnetic guide plate (42) evenly distributed on the side edges of two mating insulating units (31), which achieve magnetic adsorption and fixation by pressing; The multiple sets of insulation units (31) include a knife switch mounting slot insulation base (310), and the two sides of the knife switch mounting slot insulation base (310) are respectively provided with a terminal block insulation base one (311) and a terminal block insulation base two (312). The knife switch body (1) is installed in the knife switch mounting groove insulating base (310), and the lower end of the knife switch body (1) is connected to an insulating column (6), and the lower end of the insulating column (6) is provided with a base (7).

2. The retractable high-voltage switch shielding device according to claim 1, characterized in that, The pleated structure of the retractable cover (2) is a folded Accordion structure.

3. The retractable high-voltage switch shielding cover device according to claim 1, characterized in that, The permanent magnet array (41) of the press-type magnetic locking module (4) uses neodymium iron boron magnets with a surface magnetic field strength ≥480mT.

4. The retractable high-voltage switch shielding cover device according to claim 1, characterized in that, An environmental monitoring system (5) is installed at the inner edge of the insulating base (310) of the switch mounting slot, including an integrated temperature and humidity sensor (51) and a control unit (52), the control unit (52) transmitting data based on the sensor data.

5. The retractable high-voltage switch shielding device according to claim 1, characterized in that, The insulating unit (31) is made of silicone rubber, EPDM or PTFE with high insulation strength and weather resistance.

6. The retractable high-voltage disconnect switch shielding device according to claim 5, characterized in that, The insulating thermochromic layer (32) is made of a color-changing response film of fluoroplastic-based thermochromic composite material bonded to the side of multiple insulating units (31).

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