A substation primary and secondary equipment shielding device

Abstract

The utility model discloses a transformer substation primary and secondary equipment shielding device relates to electric power equipment safety protection technical field, the device includes the upper cover of mutual sliding to adjust size, lower cover, sliding block and fixed block, through permanent magnet adsorption fixed in equipment shell, and the device main part is made of insulating, fire -retardant, weather -resistant engineering plastics, can closely fit equipment contour, effectively prevent equipment from dust, oil dirt, damp etc. Pollution and physical damage, and prevent accidental electric shock, and the device integrates electronic ink screen, inductive power module and wireless communication module, and inductive power module utilizes the alternating field of equipment operation and supplies power for the device itself, realizes energy self -sufficiency, and wireless communication module allows through external terminal non -contact type to update the equipment identification, state or safety warning information of electronic ink screen display, the utility model discloses adjustable structure, and installation is convenient, and protection is reliable, and energy self -sufficiency, and information wireless update.

Description

Technical Field

[0001] This utility model relates to the field of power equipment safety protection technology, specifically a shielding device for primary and secondary equipment in a substation. Background Technology

[0002] In power systems, substations contain a large number of primary and secondary equipment such as terminal blocks, circuit breakers, and pressure plates. During operation and maintenance, the energized parts or critical operating components of these devices are often exposed, posing various safety hazards and management challenges. For example, maintenance personnel face the risk of accidental electric shock when operating or approaching these devices; unclear equipment markings or those blurred by environmental corrosion can easily lead to wiring errors, incorrect circuit breaker operation, or misoperation of pressure plates, affecting the safe and stable operation of the power system; at the same time, long-term exposure to dust, moisture, oil, and other environments can easily lead to decreased insulation performance, poor contact, or even physical damage to the equipment. Therefore, effective shielding and protection of these devices is crucial.

[0003] Existing technologies already include some designs for equipment protection, such as:

[0004] Chinese invention patent CN114597690B discloses a terminal block with protective function. It uses a protective cover and a movable cover plate, and under certain conditions, the movable cover plate is closed by the contact of a limiting member with the connector to prevent the connector from being exposed and misoperated. This design mainly provides protection for the terminal block body with a specific structure. The cover plate is closed by mechanical linkage, which can prevent electric shock and accidental disconnection and connection to a certain extent.

[0005] Chinese invention patent CN116316093B discloses a lean protective cover for secondary terminal blocks in substations. Its feature is that each secondary terminal is provided with a removable protective cover, and the opening and closing of the operating window is controlled by a structure of a knob driving a rack and a baffle to prevent accidental contact. This design provides a modular protection method for secondary terminal blocks and designs an opening and closing mechanism for the operating window.

[0006] The above designs, by designing special protective covers or covers with opening and closing mechanisms for specific equipment (mainly wiring terminals or terminal blocks), have solved the problems of preventing accidental contact and electric shock to a certain extent. However, they still have certain limitations. For example, for other types of equipment widely present in substations, such as circuit breakers, disconnector operating mechanisms, and protection pressure plate groups of different sizes and shapes, there is a lack of universal and adaptable shielding solutions. There is also a lack of flexible size adjustment capabilities, making it difficult to adapt to equipment of the same type but with different specifications and models in substations. The versatility is not strong, and installation or disassembly may not be convenient. In contrast, this utility model uses magnetic adsorption, which makes installation simpler and faster. However, it cannot integrate display functions to show equipment status, number, or safety warning information, nor can it realize remote or wireless information updates. Management efficiency and intelligence level need to be improved. If electronic display functions are to be integrated, additional power supply or batteries are usually required, but the existing design does not consider the issue of energy self-sufficiency.

[0007] Therefore, it is necessary to develop a new type of substation primary and secondary equipment shielding device that is structurally adjustable, easy to install, widely applicable, and reliably protected, and can integrate information display, energy self-sufficiency, and wireless communication functions, in order to overcome the shortcomings of existing technologies and better meet the needs of safe, efficient, and intelligent operation and maintenance of modern substations. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a shielding device for primary and secondary equipment in substations to solve the above-mentioned problems.

[0009] The purpose of this utility model is achieved through the following technical solution: a shielding device for primary and secondary equipment in a substation, comprising an upper cover and a lower cover symmetrically arranged, with upper and lower sliders slidably connected between the upper and lower covers, and upper and lower horizontal sliders slidably connected to the ends of the upper and lower covers respectively. Upper and lower fixing blocks are slidably connected to the ends of the upper and lower horizontal sliders respectively away from the upper and lower covers, and a slot is fixedly connected to the end of the lower cover away from the lower horizontal slider. An electronic ink screen is engaged in the slot, and a coil is fixedly connected to the end of the electronic ink screen near the lower cover. Permanent magnets are fixedly connected to the ends of the upper and lower fixing blocks away from the upper and lower sliders. The coil is electrically connected to the electronic ink screen, and the electronic ink screen contains a wireless communication module and an inductive power extraction module.

[0010] A spring piece 1 is fixedly connected between the lower cover and the upper cover, and a spring piece 2 is fixedly connected between the upper horizontal slider and the upper fixed block and the upper cover. Similarly, a spring piece 2 is fixedly connected between the lower horizontal slider and the lower fixed block and the lower cover.

[0011] The upper and lower covers are provided with grooves corresponding to the upper and lower sliders, the upper cover and the upper fixing block are provided with grooves corresponding to the upper horizontal slider, and the lower cover and the lower fixing block are provided with grooves corresponding to the lower horizontal slider.

[0012] The top cover, bottom cover, upper fixing block, and lower fixing block are designed with corresponding shapes to the shape of the primary or secondary equipment, ensuring a tight fit to the equipment contour, effectively blocking dust, oil, moisture, and foreign objects from entering, protecting the electrical connection parts and internal mechanical structure of the equipment, and are made of insulating, fireproof, and weather-resistant engineering plastics through precision injection molding.

[0013] Limiting blocks are provided on the upper cover, lower cover, upper and lower sliders, upper horizontal slider, lower horizontal slider, upper fixing block, and lower fixing block. When the upper cover and lower cover are in contact with each other, spring piece one is in its natural state. When the upper cover and lower cover move away from each other, spring piece one is compressed. Spring piece two is also in its natural state when the upper fixing block is in contact with the upper cover and when the lower fixing block is in contact with the lower cover. Spring piece two is compressed when the upper fixing block and lower fixing block move away from the upper and lower sliders.

[0014] The inductive power supply module includes:

[0015] The magnetic core assembly, located around the coil, is used to focus the magnetic flux under the action of the alternating magnetic field generated by the operating current of the primary or secondary equipment; the rectifier energy storage assembly, electrically connected to the coil, is used to convert the AC energy induced by the coil into DC energy and temporarily store it.

[0016] The inductive power module also includes an energy management subunit, which is electrically connected to the rectifier energy storage component. It is used to regulate and limit the voltage of the temporarily stored energy and output driving power when the e-ink screen needs to be refreshed or the wireless communication module needs to work.

[0017] The wireless communication module includes:

[0018] The near-field antenna unit is connected to the communication control circuit inside the e-ink screen and is used to receive radio frequency signals and sense radio frequency energy when an external reading and writing terminal is nearby.

[0019] The radio frequency energy coupling subunit is electrically connected to the near-field antenna unit and is used to demodulate the received radio frequency signal into data frames and rectify the radio frequency energy into DC power.

[0020] The ultra-low power wake-up subunit is electrically connected to the radio frequency energy coupling subunit and the energy management subunit. It is used to issue a refresh command to the e-ink screen when a valid radio frequency data frame is detected, and to turn off the power supply of the wireless communication module itself after the communication ends to reduce standby power consumption.

[0021] A diode is used to isolate the energy management subunit from the radio frequency energy coupling subunit to prevent backflow of power between the inductive power extraction module and the wireless communication module under different operating conditions.

[0022] The ultra-low power wake-up subunit is connected to the drive control circuit of the e-ink screen via bus communication to realize data parsing, display content refresh and status feedback.

[0023] The beneficial effects of this utility model are:

[0024] 1. By using components such as upper and lower covers and fixing blocks made of insulating and fireproof engineering plastics, the key parts of the primary and secondary equipment of the substation are effectively shielded, forming a reliable physical isolation barrier. This can effectively prevent maintenance personnel from accidentally touching live equipment or exposed conductors during inspection and maintenance, significantly reducing the risk of electric shock. At the same time, the shielding structure also reduces the possibility of accidental contact or misoperation due to complex environment or poor visibility, further ensuring personal safety and equipment safety.

[0025] 2. The customized shielding body can closely fit the contours of various equipment, effectively preventing dust, oil, moisture, salt spray, insects and other foreign objects from entering the equipment. This helps protect the internal electrical connection points (such as terminal block terminals, circuit breaker contacts, pressure plate contacts, etc.) from contamination and corrosion, maintain good contact and insulation performance, and protect the delicate internal mechanical structure from damage or jamming. The use of weather-resistant engineering plastics also ensures that the shielding device itself can be used stably for a long time in outdoor or harsh environments in substations.

[0026] 3. The innovative inductive power module picks up the electromagnetic energy generated by the operating current of the device through coil and magnetic core components, and provides driving power for the built-in e-ink screen and wireless communication module through rectification, energy storage and energy management. This completely eliminates the need for external power supply or periodic battery replacement, realizes the device's energy self-sufficiency and true "passive" operation, greatly reduces the maintenance cost and workload of long-term operation, and is particularly suitable for large-scale deployment or remote, unattended substations.

[0027] 4. The integrated e-ink screen can clearly display key equipment information, such as equipment name, serial number, real-time status (e.g., closed / open, engaged / disengaged), operation permission, and safety warnings (e.g., "Do not close, people are working"). Combined with the wireless communication module, maintenance personnel can use handheld terminals (e.g., NFC mobile phones) to conveniently and quickly read or update the displayed content without contact. This greatly improves the efficiency and accuracy of equipment identification management, facilitates digital inspection and status visualization management, and enhances the intelligent level of substation operation and maintenance.

[0028] 5. The sophisticated multi-directional sliding adjustment mechanism (including upper and lower sliders, horizontal sliders and matching grooves) and elastic element (spring) design enable this device to flexibly adjust its size to adapt to substation primary and secondary equipment of different specifications and shapes. This improves the versatility of the product, reduces the types of shielding devices required, and facilitates on-site equipment configuration and use.

[0029] 6. The device is installed using permanent magnets on the fixing block, which is simple and quick to operate and requires no special tools. The strong magnetic force combined with the auxiliary clamping force generated by the elastic element ensures that the device can be firmly fixed to the metal shell of the equipment. It is not easy to loosen or fall off even if the equipment vibrates or is slightly disturbed during operation.

[0030] 7. The e-ink screen itself has the characteristics of bistable and zero-power static display. Combined with the intelligent management of the ultra-low power wake-up subunit, the device consumes very little power in standby mode. This ensures that even when the device current is small and the inductive power draw is weak, it can maintain basic functions and reliably wake up when needed (such as when receiving a wireless command) to complete information updates and display, thus ensuring the practicality and reliability of the function. Attached Figure Description

[0031] Figure 1 This is an overall structural diagram of the present invention;

[0032] Figure 2 The overall explosion of this utility model Figure 1 ;

[0033] Figure 3 This is a partial exploded view of the present invention;

[0034] Figure 4 The overall explosion of this utility model Figure 2 ;

[0035] Figure 5 This is a front view of the present invention;

[0036] Figure 6 For the present utility model Figure 5 Sectional view of AA;

[0037] Figure 7 For the present utility model Figure 6 BB section view;

[0038] Figure 8 For the present utility model Figure 6 CC section view;

[0039] Figure 9 For the present utility model Figure 6 DD section view;

[0040] Figure 10 This is a diagram showing the usage state of this utility model;

[0041] Figure 11 This is a structural diagram of the present utility model.

[0042] Explanation of the labels in the diagram

[0043] 1. Top cover; 2. Bottom cover; 3. Upper and lower sliders; 4. Upper horizontal slider; 5. Lower horizontal slider; 6. Upper fixing block; 7. Lower fixing block; 8. Slot; 9. Electronic ink screen; 10. Coil; 11. Spring 1; 12. Spring 2. Detailed Implementation

[0044] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0045] It should be noted that the directional concepts of "left", "right", "up", "down", "front", "back", "inner", and "outer" in the following scheme are all relative directions, and will not be listed one by one here.

[0046] Example 1:

[0047] like Figures 1 to 11 As shown, this embodiment provides a shielding device for primary and secondary equipment in a substation, which aims to solve the problems of safety hazards, physical damage and pollutant corrosion caused by the exposure of substation equipment (such as terminal blocks, circuit breakers, pressure plates, etc.) in the prior art. The focus of this embodiment is its flexible and adjustable mechanical structure and reliable physical protection capabilities.

[0048] The core structure of the shielding device for primary and secondary equipment in this substation includes a pair of protective shells designed to be symmetrical, namely the upper cover 1 and the lower cover 2. In order to accommodate substation equipment of different sizes, the device is designed with a multi-dimensional adjustment mechanism.

[0049] In the vertical direction, the upper cover 1 and the lower cover 2 are slidably connected by one or more upper and lower sliders 3. Specifically, matching grooves are provided on the inner surfaces of the upper cover 1 and the lower cover 2 and on the corresponding sides of the upper and lower sliders 3, so that the upper and lower sliders 3 can slide smoothly in these grooves, thereby allowing the upper cover 1 and the lower cover 2 to move closer or further away from each other to adjust the overall height of the device. In order to provide stable support or reset force after adjustment, spring pieces 11 are fixedly connected between the lower cover 2 (or the upper cover 1) and the upper and lower sliders 3, and between the upper cover 1 (or the lower cover 2) and the upper and lower sliders 3. These spring pieces 11 are compressed when the upper cover 1 and the lower cover 2 are pulled apart to accommodate a higher device, generating an inward thrust, which helps the device clamp the device or return to a smaller state when there is no external force.

[0050] In the horizontal direction, the device also has adjustment capabilities. At the end of the upper cover 1 away from the upper and lower sliders 3, an upper horizontal slider 4 is slidably connected; similarly, at the end of the lower cover 2 away from the upper and lower sliders 3, a lower horizontal slider 5 is slidably connected. These connections are also achieved by creating corresponding grooves between the upper cover 1 and the upper horizontal slider 4, and between the lower cover 2 and the lower horizontal slider 5. Furthermore, at the end of the upper horizontal slider 4 away from the upper cover 1, an upper fixing block 6 is slidably connected; at the end of the lower horizontal slider 5 away from the lower cover 2, a lower fixing block 7 is slidably connected. These connections are also achieved by creating corresponding grooves between the upper horizontal slider 4 and the upper fixing block 6, and between the lower horizontal slider 5 and the lower fixing block 7. This dual sliding structure (the horizontal slider slides relative to the cover plate, and the fixing block slides relative to the horizontal slider) greatly expands the adjustment range of the device in the horizontal direction to accommodate the width or depth of the equipment.

[0051] To provide tension and maintain stability during horizontal adjustment, spring clips 12 are fixedly connected between the upper horizontal slider 4, the upper fixed block 6, and the upper cover 1; similarly, spring clips 12 are also fixedly connected between the lower horizontal slider 5, the lower fixed block 7, and the lower cover 2. When the upper fixed block 6 and the lower fixed block 7 move outward (away from the direction of the upper and lower sliders 3) to accommodate a wider device, these spring clips 12 are compressed, generating an inward thrust to ensure that the device can fit tightly against the side of the device.

[0052] The upper and lower sliders 3, the upper horizontal slider 4, and the lower horizontal slider 5 are all made of flexible materials, which can be bent to adapt to different electrical equipment when needed;

[0053] Card slot 8 is made of transparent material, making it easy to view the e-ink screen 9 through card slot 8;

[0054] In terms of energy conversion and storage, the rectifier energy storage component is responsible for converting the alternating current induced by the coil 10 into direct current and storing it. Regarding the energy storage element, in addition to the aforementioned supercapacitor or rechargeable battery, this utility model also provides or supplements an energy storage method that integrates protection functions: at the end of the coil 10 away from the lower cover 2 (for example, it can be designed to be close to or integrated on the outside of the e-ink screen 9), a special capacitor structure is provided. This structure includes a first metal sheet and a second metal sheet. These two metal sheets are arranged in parallel and are isolated and fixedly connected by an insulating layer, thereby forming a parallel plate capacitor.

[0055] The first and second metal plates of the capacitor are electrically connected to the coil 10 (after rectification circuit) and the power management section (such as energy management subunit) of the e-ink screen 9 through internal circuit. The capacitor designed in this way can not only serve as a main or auxiliary energy storage unit to store the electrical energy collected by induction, but also provide instantaneous power support or voltage regulation and filtering for the refresh of the e-ink screen 9 or the operation of the wireless communication module.

[0056] Meanwhile, the capacitor structure also protects the e-ink screen 9. Since the first and second metal sheets are conductive layers, their physical presence can effectively shield interference from external sources (i.e., strong electromagnetic fields generated by other electrical equipment in the substation environment). This structure can absorb, reflect, or attenuate the electromagnetic waves that penetrate, preventing these electromagnetic fields from adversely affecting the sensitive e-ink screen 9 and its driving circuit, such as display abnormalities, data errors, or device damage, thereby improving the stability and reliability of the device in complex electromagnetic environments.

[0057] To prevent excessive sliding of the sliding parts during adjustment, which could cause them to fall off, corresponding limit blocks are provided at the ends of the grooves or on the mating surfaces of the upper cover 1, lower cover 2, upper and lower sliders 3, upper horizontal slider 4, lower horizontal slider 5, upper fixing block 6, and lower fixing block 7. These limit blocks define the maximum sliding distance of each part.

[0058] The device is fixed by magnetic adsorption. Permanent magnets are firmly fixed to the ends of the upper fixing block 6 and the lower fixing block 7 that are away from the upper and lower sliders 3 (i.e., the outermost part of the device). These permanent magnets are made of materials with high magnetic energy product (such as neodymium iron boron) and may be treated with rust prevention and insulation to adapt to the substation environment. When the device is placed on substation equipment with a ferromagnetic shell, the permanent magnets can generate a strong adsorption force to firmly fix the entire device to the surface of the equipment.

[0059] A slot 8 is fixedly provided at the end of the lower cover 2 away from the lower horizontal slider 5. The size and shape of the slot 8 are designed to precisely engage and fix the e-ink screen 9. A coil 10 is also fixedly connected to the side of the e-ink screen 9 near the lower cover 2. The coil 10 is electrically connected to the e-ink screen 9 for subsequent inductive power extraction (see Embodiment 2 for details).

[0060] The main protective structures of the device, including the upper cover 1, lower cover 2, upper fixing block 6, and lower fixing block 7, are primarily made of high-performance engineering plastics (such as PBT, PC / ABS alloy, etc.) through precision injection molding. This material possesses excellent electrical insulation properties, flame retardancy (fireproofing), weather resistance (UV resistance, high and low temperature resistance, chemical corrosion resistance), and mechanical strength. More importantly, the shapes of these components are customized according to the outline of the target equipment to be shielded (such as specific models of terminal blocks, molded case circuit breakers, operating pressure plate assemblies, and other primary or secondary equipment). This ensures that after installation, the components fit snugly against the equipment surface to the greatest extent possible, forming an effective physical barrier that prevents dust, oil, moisture, insects, and other foreign objects from entering the equipment, thereby protecting the internal electrical connection points (such as terminals and contacts) and precision mechanical structures (such as operating mechanisms).

[0061] Work process:

[0062] Before use, the operator manually adjusts the shielding device according to the actual dimensions of the target substation equipment. By stretching or compressing the upper cover 1 and the lower cover 2, the vertical height of the device is adjusted by sliding the upper and lower sliders 3 in the groove. By stretching or compressing the upper fixing block 6 and the lower fixing block 7, the horizontal width or depth of the device is adjusted by sliding the upper horizontal slider 4 and the lower horizontal slider 5 in the groove. The spring piece 11 and the spring piece 2 12 provide a certain damping and tension during the adjustment process and help maintain the shape after the adjustment is in place. The limit block ensures that the adjustment is carried out within the safe range.

[0063] Place the adjusted shielding device directly onto the target equipment and adjust its position so that the inner contours of the upper cover 1, lower cover 2, upper fixing block 6, and lower fixing block 7 fit tightly against the outer surface of the equipment. At this time, the permanent magnets located on the outside of the upper fixing block 6 and lower fixing block 7 will automatically attract to the metal shell of the equipment (such as an iron box, mounting plate, etc.), firmly fixing the device. The continuous thrust generated by the spring piece 11 and the spring piece 2 12 also helps the device to press more tightly against the surface of the equipment.

[0064] After installation, the shielding structure formed by the upper cover 1, lower cover 2, upper fixing block 6 and lower fixing block 7 covers the key parts of the equipment, effectively blocking pollutants such as dust, oil, and moisture in the external environment, and preventing accidental contact or entry of small animals. At the same time, the electronic ink screen 9 in the card slot 8 (whose power supply and communication will be described in Embodiment 2) can display equipment information or status.

[0065] Through the multi-directional sliding adjustment mechanism of the upper and lower sliders 3, the upper horizontal slider 4, and the lower horizontal slider 5, as well as the tension provided by the spring plate 11 and the spring plate 2 12, this device can flexibly adjust its size to adapt to substation primary and secondary equipment of different specifications and shapes, thereby improving the versatility of the product and reducing the types of special shielding tools that need to be prepared.

[0066] The device is fixed by adsorption using permanent magnets on the upper fixing block 6 and the lower fixing block 7. No additional tools are required during installation, and the operation is simple and quick. The high-strength permanent magnets and the auxiliary clamping force generated by the spring sheet 11 and spring sheet 212 ensure that the device can be firmly attached even when the equipment is running (which may be accompanied by vibration) or under daily operation interference, and is not easy to shift or fall off.

[0067] Made of insulating, fireproof, and weather-resistant engineering plastics, and using precision injection molding to create a customized upper cover 1, lower cover 2, upper fixing block 6, and lower fixing block 7, it can closely fit the contour of the equipment, forming an effective physical barrier. This significantly reduces the impact of environmental factors such as dust, oil, and moisture on the electrical performance (such as insulation resistance and contact resistance) and mechanical life of the equipment, protecting the internal structure of the equipment from contamination and damage.

[0068] The physical isolation provided by the shielding device effectively prevents maintenance personnel from accidentally touching live parts or exposed conductors of the equipment in complex environments, significantly reducing the risk of electric shock. At the same time, shielding the equipment also reduces the possibility of accidental contact or misoperation.

[0069] The sliding groove design and limit block setting at the sliding connection ensure the smoothness and durability of the adjustment mechanism, prevent the parts from loosening or being damaged, and the overall structural design is reasonable and the materials are properly selected, ensuring a long service life.

[0070] The design of slot 8 provides a standardized installation interface for the subsequent integration of e-ink screen 9, which not only achieves physical protection but also lays the foundation for the information management of the device (status display, identification, etc.).

[0071] By designing the energy storage capacitor into a specific structure consisting of a first metal sheet, a second metal sheet, and an insulating layer, and placing it close to the e-ink screen, the two major functions of energy storage and electromagnetic shielding are integrated. This not only simplifies the structure and saves space, but also enhances the anti-interference capability of the e-ink screen in the strong electromagnetic interference environment of substations, thereby improving display reliability.

[0072] In summary, the substation primary and secondary equipment shielding device disclosed in this embodiment, through its innovative adjustable mechanical structure, reliable magnetic fixing method, and excellent material selection and shape design, achieves effective physical protection, convenient installation, and wide applicability for substation equipment, significantly improving the reliability of equipment operation and the safety of maintenance work.

[0073] Example 2:

[0074] like Figures 1 to 11 As shown, this embodiment, based on the mechanical structure and basic protective functions of the adjustable shielding device described in Embodiment 1, further elaborates on the advanced electronic modules integrated in the device, especially the specific composition and working mode of the inductive power supply module and the wireless communication module, aiming to achieve energy self-sufficiency, wireless information updates and intelligent management of the device. This embodiment relies on the physical platform constructed in Embodiment 1, including an upper cover 1, a lower cover 2, various sliders (upper and lower sliders 3, upper horizontal slider 4, lower horizontal slider 5), fixing blocks (upper fixing block 6, lower fixing block 7), a slot 8 for installing the electronic ink screen 9, and permanent magnets for fixing, etc.

[0075] The core of this embodiment lies in two key electronic systems embedded inside or closely related to the e-ink screen 9: the inductive power supply module and the wireless communication module.

[0076] The inductive power module utilizes the electromagnetic field generated by the operation of the shielded equipment (especially primary equipment, such as busbars, cables, or secondary circuits with large current) to obtain energy, drive the e-ink screen 9 and the wireless communication module, and achieve energy self-sufficiency.

[0077] The energy pickup unit mainly includes a coil 10, which is mentioned in Embodiment 1 and fixedly connected to one end of the e-ink screen 9 near the lower cover 2. In order to improve the energy pickup efficiency, a magnetic core assembly is provided on the periphery or inside of the coil 10. The magnetic core assembly is usually made of ferrite material with high magnetic permeability and is designed to effectively converge (focus) the magnetic flux from the alternating magnetic field generated by the device's operating current, thereby inducing a stronger alternating electromotive force in the coil 10. The number of turns, wire diameter, and shape and material of the magnetic core assembly of the coil 10 are optimized according to the magnetic field strength and frequency characteristics of the target device.

[0078] The energy conversion and storage unit, also known as the rectifier energy storage component, is electrically connected to the coil 10. This component contains a high-efficiency rectifier circuit (e.g., using a low-dropout Schottky diode bridge or a synchronous rectifier circuit) to convert the AC energy induced by the coil 10 into DC energy. The converted DC energy is temporarily stored in an energy storage element, which can be a large-capacity supercapacitor (preferred due to its long lifespan and wide operating temperature range) or a small rechargeable lithium-ion battery. The selection of the energy storage element must consider energy density, power density, charge / discharge cycles, operating temperature range, and safety.

[0079] The energy management and output unit, also known as the energy management subunit, is connected to the output of the rectifier energy storage component. This subunit is responsible for the fine management of the stored electrical energy. It includes voltage regulation circuitry (such as a low-dropout linear regulator (LDO) or a high-efficiency DC-DC converter, such as a Buck-Boost circuit) to ensure a stable and compliant operating voltage (e.g., 3.3V or 1.8V) for the controller, drive circuitry, and wireless communication module of the e-ink display 9. It also features voltage limiting protection to prevent overcharging of the energy storage components and undervoltage protection to shut down the output when power is insufficient, protecting the energy storage components and the load. The energy management subunit adopts a low-power design and only outputs drive power according to system requirements (only when the e-ink display 9 needs to refresh or the wireless communication module needs to operate), minimizing static power consumption.

[0080] The wireless communication module enables the shielding device to wirelessly interact with external handheld terminals (such as inspection devices and smartphones), mainly for receiving update instructions and displaying content, and updating the display of the e-ink screen 9.

[0081] The radio frequency interface unit includes a near-field antenna unit, which is typically a small planar coil antenna integrated inside the e-ink screen 9 module or printed immediately adjacent to its surface. It is designed to operate at frequencies commonly used in near-field communication (NFC), such as 13.56MHz. This antenna unit is responsible not only for receiving radio frequency signals emitted by external reading and writing terminals, but also for sensing radio frequency energy in strong fields. It is connected to the communication control circuit inside the e-ink screen 9.

[0082] The signal processing and energy harvesting unit, also known as the radio frequency energy coupling subunit, is electrically connected to the near-field antenna unit. This subunit includes radio frequency front-end circuitry, which can demodulate the received, modulated radio frequency signals (e.g., using ASK or FSK modulation) to recover digital frames containing instructions and data. It may also integrate energy harvesting circuitry to rectify the energy induced from the radio frequency field and convert it into DC power. This energy can be used to supplement the energy of the inductive power harvesting module or as the main temporary power source when inductive power harvesting is insufficient (e.g., the device is not running or the current is low).

[0083] The communication wake-up and control unit, also known as the ultra-low power wake-up subunit, is crucial for achieving extremely low standby power consumption. It is connected to both the radio frequency energy coupling subunit and the energy management subunit. In standby mode, this subunit continuously monitors the near-field antenna unit for valid radio frequency signals with an extremely low current at the nanoamp or microamp level. Once a valid data frame conforming to a preset protocol (e.g., an instruction containing a specific wake-up sequence or device ID) is detected, it "wakes up" the system. On one hand, it may request the energy management subunit to output main power; on the other hand, it activates the main controller of the e-ink screen 9 and other parts of the wireless communication module. After wake-up, this subunit or the main controller is responsible for parsing the instructions and data in the data frame. After completing the communication tasks (such as receiving data and sending a response) and refreshing the e-ink screen 9, this subunit will actively put the system (including most of its own circuitry) back into ultra-low power standby or hibernation mode, retaining only the necessary monitoring functions.

[0084] To ensure the safe and reliable operation of both the inductive power supply and the radio frequency energy harvesting power paths, diodes or other forms of isolation devices are placed between the output of the energy management subunit (from inductive power supply) and the radio frequency energy coupling subunit (which may generate radio frequency harvested power). This prevents current from flowing back into the other power path when the voltage of one power path is high, thus avoiding potential damage or efficiency reduction.

[0085] The ultra-low power wake-up subunit (or the main controller of the wireless communication module) communicates with the drive control circuit of the e-ink screen 9 via a standard serial bus (such as SPI or I2C). Through this bus, the parsed display data and refresh instructions can be efficiently transmitted to the controller of the e-ink screen 9. The controller then drives the screen pixels to change to update the display content. Similarly, the e-ink screen 9 can also use this bus to feed back its status information (such as refresh completed, busy status, error code, etc.) to the communication module.

[0086] Work process:

[0087] When the device is installed on a running substation, the inductive power extraction module continues to work. The coil 10 induces alternating current in the alternating magnetic field (enhanced by the magnetic core assembly) generated by the device. This alternating current is then converted into direct current by the rectifier energy storage component and stored in the energy storage element. The energy management subunit monitors the energy storage status and maintains the system in a minimum power standby state. At this time, the e-ink screen 9 retains the image from the last refresh (zero power display), and the ultra-low power wake-up subunit listens to the radio frequency channel with extremely low power consumption.

[0088] When an external reader / writer terminal with NFC functionality (such as a mobile inspection device) approaches the shielding device, the radio frequency field emitted by the terminal is received by the near-field antenna unit. The radio frequency energy coupling subunit demodulates the signal. If the signal contains a valid wake-up command and data (such as new device status or identification information), the ultra-low power wake-up subunit is triggered.

[0089] The wake-up subunit activates the main controller and related circuits of the wireless communication module of the e-ink screen 9, and may request the energy management subunit to provide a stable operating power supply (if the energy storage of the inductive power supply is sufficient). The radio frequency energy coupling subunit may simultaneously collect energy from the radio frequency field to supplement the power supply. The wireless communication module sends the received and parsed data (such as new text or image data to be displayed) to the drive control circuit of the e-ink screen 9 through the bus.

[0090] The drive control circuit of the e-ink screen 9 uses electrical energy obtained from the energy management subunit to drive the screen pixels to refresh according to the received data and display new information. The refresh process of the e-ink screen may take several seconds and requires continuous power supply.

[0091] After data transmission and screen refresh are completed, the communication task ends. The ultra-low power wake-up subunit detects the task completion (possibly by receiving feedback via the bus or by determining a timeout) and actively switches the system (including most of the circuitry of the communication module and screen controller) back to ultra-low power standby mode, waiting for the next wake-up event.

[0092] Combining the bistable characteristics of the inductive power supply module (coil 10, magnetic core assembly, rectifier energy storage assembly, energy management subunit) and the e-ink screen 9, the device consumes almost no power when the display is not refreshed. The inductive power supply function utilizes the energy generated by the device's own operation, eliminating the need for external power supply or battery replacement, which greatly reduces operation and maintenance costs and is particularly suitable for long-term deployment and unattended environments.

[0093] The wireless communication module (near-field antenna unit, radio frequency energy coupling sub-unit, ultra-low power wake-up sub-unit) supports contactless and rapid updating of device identification, operating status, operation permission, security warnings and other information displayed on the e-ink screen 9 through near-field communication technologies such as NFC, which improves the efficiency and flexibility of information updates and avoids the trouble and errors of traditional label replacement or handwriting.

[0094] The design of the ultra-low power wake-up subunit ensures that the device is in a deep sleep state most of the time and is only woken up when communication or refresh is required, which significantly extends the possibility of working by relying on weak energy harvesting and makes the inductive power supply scheme more reliable and practical.

[0095] The e-ink screen 9, capable of dynamically displaying real-time or near-real-time information, combined with wireless update capabilities, makes this shielding device an intelligent terminal node for substation equipment status monitoring and information management, which helps to achieve digital inspection, remote status confirmation (by reading the displayed information), and more refined safety management.

[0096] Diode isolation effectively manages two possible power inputs: inductive power and radio frequency energy harvesting, preventing mutual interference and improving the stability and reliability of the power system.

[0097] The inductive power supply, wireless communication, and e-ink display functions are seamlessly integrated into the mechanical structure with good physical protection and adjustment capabilities described in Embodiment 1, achieving a unity of physical protection and intelligent information interaction. Bus communication ensures accurate and efficient data transmission between the communication unit and the display unit.

[0098] In summary, based on Embodiment 1, this embodiment integrates a cleverly designed inductive power extraction module and an ultra-low power wireless communication module, giving the shielding device of primary and secondary equipment in substations the ability to be self-sufficient in energy and wirelessly update information. This significantly improves the intelligence level, ease of operation and maintenance, and the economy and reliability of long-term operation of the device.

[0099] The above description is only a preferred embodiment of the present utility model. It should be understood that the present utility model is not limited to the form disclosed herein and should not be regarded as an exclusion of other embodiments. It can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and changes made by those skilled in the art that do not depart from the spirit and scope of the present utility model should be protected within the scope of the appended claims.

Claims

1. A shielding device for primary and secondary equipment in a substation, characterized in that, The device includes an upper cover (1) and a lower cover (2) arranged symmetrically. The upper cover (1) and the lower cover (2) are slidably connected by upper and lower sliders (3). The upper cover (1) and the lower cover (2) are slidably connected by an upper horizontal slider (4) and a lower horizontal slider (5) respectively at the ends of the upper horizontal slider (4) and the lower horizontal slider (5) away from the upper cover (1) and the lower cover (2) respectively. The lower cover (2) is fixedly connected to a slot (8) at the end away from the lower horizontal slider (5). An electronic ink screen (9) is snapped into the slot (8). A coil (10) is fixedly connected to the end of the electronic ink screen (9) near the lower cover (2). A permanent magnet is fixedly connected to the ends of the upper fixed block (6) and the lower fixed block (7) away from the upper and lower sliders (3). The coil (10) is electrically connected to the electronic ink screen (9). The electronic ink screen (9) is equipped with a wireless communication module and an inductive power extraction module.

2. The shielding device for primary and secondary equipment in a substation according to claim 1, characterized in that: The lower cover (2) is fixedly connected to the upper cover (1) and the lower cover (2) by a spring piece one (11). The upper horizontal slider (4) is fixedly connected to the upper fixing block (6) and the upper cover (1) by a spring piece two (12). The lower horizontal slider (5) is also fixedly connected to the lower fixing block (7) and the lower cover (2) by a spring piece two (12).

3. The shielding device for primary and secondary equipment in a substation according to claim 1, characterized in that: The upper cover (1) and lower cover (2) are provided with grooves at the corresponding positions of the upper and lower sliders (3), the upper cover (1) and upper fixing block (6) are provided with grooves at the corresponding positions of the upper horizontal slider (4), and the lower cover (2) and lower fixing block (7) are provided with grooves at the corresponding positions of the lower horizontal slider (5).

4. The shielding device for primary and secondary equipment in a substation according to claim 1, characterized in that: The upper cover (1), lower cover (2), upper fixing block (6) and lower fixing block (7) are designed with corresponding shapes for the appearance of primary or secondary equipment to ensure a close fit to the equipment outline, effectively blocking dust, oil, moisture and foreign objects from entering, protecting the electrical connection parts and internal mechanical structure of the equipment, and using insulating, fireproof and weather-resistant engineering plastics as raw materials, and formed by precision injection molding process.

5. A shielding device for primary and secondary equipment in a substation according to claim 2, characterized in that: Limiting blocks are provided on the upper cover (1), lower cover (2), upper and lower sliders (3), upper horizontal slider (4), lower horizontal slider (5), upper fixing block (6), and lower fixing block (7). When the upper cover (1) and lower cover (2) are in contact with each other, the spring piece one (11) is in a natural state. When the upper cover (1) and lower cover (2) move away from each other, the spring piece one (11) is compressed. The spring piece two (12) is also in a natural state when the upper fixing block (6) is in contact with the upper cover (1) and when the lower fixing block (7) is in contact with the lower cover (2). The spring piece two (12) is compressed when the upper fixing block (6) and lower fixing block (7) move away from the upper and lower sliders (3).

6. A shielding device for primary and secondary equipment in a substation according to claim 1, characterized in that: The inductive power generation module includes: A magnetic core assembly is disposed around the coil (10) and is used to focus magnetic flux under the action of an alternating magnetic field generated by the operating current of the primary or secondary equipment; a rectifier energy storage assembly is electrically connected to the coil (10) and is used to convert the AC power induced by the coil (10) into DC power and temporarily store it.

7. A shielding device for primary and secondary equipment in a substation according to claim 1, characterized in that: The inductive power extraction module also includes an energy management subunit, which is electrically connected to the rectifier energy storage component. It is used to stabilize and limit the voltage of the temporarily stored energy and output driving power when the electronic ink screen (9) needs to be refreshed or the wireless communication module needs to work.

8. A shielding device for primary and secondary equipment in a substation according to claim 1, characterized in that: The wireless communication module includes: The near-field antenna unit is connected to the communication control circuit inside the electronic ink screen (9) and is used to receive radio frequency signals and sense radio frequency energy when an external reading and writing terminal is nearby. The radio frequency energy coupling subunit is electrically connected to the near-field antenna unit and is used to demodulate the received radio frequency signal into data frames and rectify the radio frequency energy into DC power. The ultra-low power wake-up subunit is electrically connected to the radio frequency energy coupling subunit and the energy management subunit. It is used to issue a refresh command to the electronic ink screen (9) when a valid radio frequency data frame is detected, and to turn off the power supply of the wireless communication module itself after the communication ends to reduce standby power consumption.

9. A shielding device for primary and secondary equipment in a substation according to claim 8, characterized in that: A diode isolation is provided between the energy management subunit and the radio frequency energy coupling subunit to prevent backflow of power between the inductive power extraction module and the wireless communication module under different operating states. The ultra-low power wake-up subunit is connected to the drive control circuit of the electronic ink screen (9) via bus communication to realize data parsing, display content refresh and status feedback.

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