A smart fuse tube type drop-out fuse

Abstract

This utility model discloses an intelligent fuse tube type drop-out fuse, including an intelligent fuse tube, an insulating support, an upper contact assembly, a limiting assembly, and a lower assembly. The intelligent fuse tube includes a fuse tube body and an intelligent integrated module; the intelligent integrated module includes a housing, a current sensor, a current transformer power supply, a non-contact voltage sensor, and a wireless communication module; the current transformer power supply is connected to the non-contact voltage sensor and the wireless communication module to provide operating power; the non-contact voltage sensor is connected to the wireless communication module to transmit voltage signals to the wireless communication module; the current sensor is connected to the wireless communication module to transmit current signals to the wireless communication module. By using this intelligent fuse tube type drop-out fuse, there is no need to replace the fuse support, reducing the cost of power grid upgrades and renovations, and the replacement process is safe and efficient. This utility model can be widely applied in the field of fuse technology.

Description

Technical Field

[0001] This utility model relates to the field of fuse technology, and in particular to an intelligent fuse tube type drop-out fuse. Background Technology

[0002] Drop-out fuses are commonly used overload and short-circuit protection devices in power systems, primarily for protecting electrical equipment such as distribution lines and transformers. Their key feature is that when the fuse wire melts, the fuse tube automatically drops, creating a clear break point for easy fault identification and maintenance. Traditional drop-out fuses rely on a mechanical structure (fuse tube drop) to indicate faults, requiring manual inspection and unable to monitor electrical parameters in real time. With the deepening of intelligent transformation of power systems, the need to collect massive amounts of grid operation data has become increasingly apparent. Traditional drop-out fuses are no longer sufficient to meet the demands of intelligent grid transformation. Therefore, intelligent drop-out fuses have emerged as a solution to the intelligent transformation of traditional drop-out fuses.

[0003] Existing intelligent drop-out fuses integrate intelligent components such as sensor modules into the fuse holder, forming an intelligent holder-type drop-out fuse. While this allows for real-time monitoring of electrical parameters such as voltage and current, the manufacturing cost of intelligent holder-type drop-out fuses is high. During power grid upgrades, replacing traditional drop-out fuses with intelligent holder-type fuses exceeds cost limits. Furthermore, the replacement process requires workers to remove the traditional drop-out fuses and install the intelligent holder-type fuses, which is cumbersome and prone to safety hazards. Utility Model Content

[0004] To address the aforementioned technical problems, the objective of this invention is to provide an intelligent fuse tube type drop-out fuse that eliminates the need to replace the fuse holder, thereby reducing the cost of power grid upgrades and renovations, and ensuring a safe and efficient replacement process.

[0005] The technical solution adopted in this utility model is: a smart fuse tube type drop-out fuse, comprising a smart fuse tube, an insulating support, an upper contact assembly, and a lower assembly, wherein:

[0006] The smart fuse tube is fixed between the lower assembly and the upper contact assembly; the upper contact assembly and the upper connector of the insulating support are connected by bolts and nuts; the spring contact piece of the upper contact assembly is in contact with the top of the smart fuse tube; one end of the lower assembly is connected to the lower connector of the insulating support by bolts and nuts; the other end of the lower assembly is connected to the tail end of the smart fuse tube.

[0007] The intelligent fuse tube includes a fuse tube body and an intelligent integrated module;

[0008] The intelligent integration module has a hollowed-out section in the middle, and the intelligent integration module is embedded in the fuse tube body through the hollowed-out section;

[0009] The fuse tube body includes a release cap, a pull ring, an arc-extinguishing tube, and a tube sleeve support. The release cap is fixed to the top end of the arc-extinguishing tube by connecting bolts. The pull ring is sleeved on the side surface of the arc-extinguishing tube. The pull ring is adjacent to the release cap. The tube sleeve support is sleeved on the bottom side surface of the arc-extinguishing tube. The outer surface of the arc-extinguishing tube is provided with an insulating layer.

[0010] The intelligent integrated module includes a housing, a current sensor, a current transformer power supply, a non-contact voltage sensor, and a wireless communication module. The housing has circular holes at the center of its upper and lower surfaces, through which it is embedded with the fuse tube body. The current sensor, current transformer power supply, non-contact voltage sensor, and wireless communication module are all located inside the housing. A hollow section is provided between the current sensor and the current transformer power supply. The current sensor and the current transformer power supply are embedded with the fuse tube body. The output terminal of the current transformer power supply is connected to the power port of the non-contact voltage sensor and the power port of the wireless communication module to provide operating power. The signal output port of the non-contact voltage sensor is connected to the signal input port of the wireless communication module to transmit the voltage signal to the wireless communication module. The signal output port of the current sensor is connected to the signal input port of the wireless communication module to transmit the current signal to the wireless communication module. The wireless communication module is connected to a cloud platform to upload the real-time acquired voltage and current signals to the cloud platform.

[0011] Furthermore, the intelligent fuse tube type drop-out fuse also includes a limiting mechanism, which is fixed between the upper contact assembly and the upper connector of the insulating support. The limiting mechanism is provided with a clearance element to prevent the intelligent fuse tube from being exposed to air. The limiting mechanism is also provided with a limiting protrusion to prevent the intelligent fuse tube from excessively squeezing the upper contact assembly.

[0012] Furthermore, the upper contact assembly includes an upper fixing plate, a spring, and a spring contact plate; the spring is disposed between the upper fixing plate and the spring contact plate.

[0013] Furthermore, the lower assembly includes a support member, a spring clip, a trunnion, and an expansion pin, wherein:

[0014] One end of the support member is connected to the lower connector of the insulating support; the expansion pin passes sequentially through the support member, the trunnion, and the spring clip, connecting the support member, the trunnion, and the spring clip together; the trunnion is connected to the sleeve bracket. Furthermore, the current sensor, the current transformer power supply, the non-contact voltage sensor, and the wireless communication module are all not electrically connected to the fuse tube body.

[0015] Furthermore, the sleeve support is provided with a circular hole; the trunnion is provided with a cylindrical protrusion; the circular hole and the cylindrical protrusion are fitted and connected.

[0016] Furthermore, the non-contact voltage sensor includes a sensing capacitor, a high-impedance input module, a signal conditioning module, and an output module, wherein:

[0017] The sensing capacitor is used to sense changes in charge within the electric field and generate a sensing signal; the high-impedance input module is used to convert the sensing signal into a voltage signal, and the input terminal of the high-impedance input module is connected to the output terminal of the sensing capacitor; the output terminal of the high-impedance input module is connected to the input terminal of the signal conditioning module; and the output terminal of the signal conditioning module is connected to the output module.

[0018] Furthermore, the non-contact voltage sensor and the wireless communication module are provided with pin holes; the corresponding pin holes on the non-contact voltage sensor and the wireless communication module are connected by connecting posts, which is used to fix the non-contact voltage sensor and the wireless communication module in layers.

[0019] Furthermore, the current sensor, the current transformer power supply, the non-contact voltage sensor, and the wireless communication module are all not electrically connected to the fuse tube body.

[0020] Furthermore, both the power port and the signal input port of the wireless communication module are equipped with terminal blocks, which are used for shared expansion of the ports.

[0021] The beneficial effects of this utility model are as follows: This utility model proposes an intelligent fuse tube type drop-out fuse, which uses a current transformer power supply to power a non-contact voltage sensor and a wireless communication module, solving the dependence on batteries for online real-time monitoring; it uses a current sensor to monitor the current signal of the power grid in real time, realizing non-contact acquisition of the power grid current signal; it uses a non-contact voltage sensor to monitor the voltage signal of the power grid in real time, realizing non-contact acquisition of the power grid voltage signal; it uses a wireless communication module to upload the acquired current and voltage signals to a cloud platform, enabling power grid personnel to monitor the power grid operation in real time; by integrating the current sensor, current transformer power supply, non-contact voltage sensor and wireless communication module into the fuse tube body, when upgrading the power grid, there is no need to replace the insulation support of the traditional drop-out fuse, only the fuse tube needs to be replaced with an intelligent fuse tube to complete the power grid upgrade, reducing technical costs; and the power grid upgrade process can be completed simply by plugging and unplugging the fuse tube, making the replacement process safe and efficient; in addition, the intelligent integrated module is non-contact with the high-voltage signal, and the intelligent integrated module works normally in a low-voltage environment, improving the service life of the intelligent integrated module. This intelligent fuse tube type drop-out fuse can monitor the voltage and current signals of the power grid in real time, and can promptly report to the power grid staff when situations such as electricity theft or circuit failure occur. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an intelligent fuse tube type drop-out fuse according to this utility model;

[0023] Figure 2 This is a schematic diagram of the upper contact assembly structure of an intelligent fuse tube type drop-out fuse according to this utility model;

[0024] Figure 3 This is a schematic diagram of the lower assembly structure of an intelligent fuse tube type drop-out fuse according to this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the intelligent fuse tube of an intelligent fuse tube type drop-out fuse according to this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of an intelligent integrated module for an intelligent fuse tube type drop-out fuse according to this utility model;

[0027] Figure 6 This is a circuit diagram of a non-contact voltage sensor for an intelligent fuse tube type drop-out fuse according to this utility model.

[0028] Figure Descriptions: 1. Release Cap; 2. Pull Ring; 3. Intelligent Integrated Module; 4. Arc Extinguishing Tube; 5. Tube Sleeve Support; 6. Insulating Support; 7. Upper Contact Assembly; 8. Limiting Assembly; 9. Lower Assembly; 10. Intelligent Fuse Tube; 301. Current Transformer Power Supply; 302. Housing; 303. Current Sensor; 304. Wireless Communication Module; 305. Non-Contact Voltage Sensor; 306. Pin Hole; 307. Connecting Post; 308. Terminal Block; 309. Housing Sealing Plate; 701. Upper Fixing Plate; 702. Spring; 70 3. Spring contact piece; 801. Clearance piece; 802. Limiting protrusion; 901. Support piece; 902. Trunnion; 903. Spring clip; 904. Expansion pin; 905. Circular hole; R4. Fourth resistor; R5. Fifth resistor; R6. Sixth resistor; R7. Seventh resistor; R8. Eighth resistor; R9. Ninth resistor; C15. Fifteenth capacitor; C16. Sixteenth capacitor; C17. Seventeenth capacitor; C18. Eighteenth capacitor; C19. Nineteenth capacitor; U5. Operational amplifier; CN1. Output module. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0033] Reference Figure 1 A smart fuse tube type drop-out fuse includes a smart fuse tube 10, an insulating support 6, an upper contact assembly 7, a limiting assembly 8, and a lower assembly 9, wherein:

[0034] The intelligent fuse tube 10 is fixed between the lower assembly 9 and the upper contact assembly 7. The upper contact assembly 7, the upper connector of the insulating support 6, and the limiting assembly 8 are all provided with round holes for bolts to pass through. Through these round holes, the upper contact assembly 7, the upper connector of the insulating support 6, and the limiting assembly 8 are sequentially fixed and connected from top to bottom by bolts and nuts. The release cap 1 of the intelligent fuse tube 10 is in contact with the spring contact piece of the upper contact assembly 7. One end of the lower assembly 9 and the lower connector of the insulating support 6 are both provided with round holes for bolts to pass through. Through these round holes, one end of the lower assembly 9 is fixedly connected to the lower connector of the insulating support 6 by bolts and nuts. The other end of the lower assembly 9 is connected to the sleeve support 5 of the intelligent fuse tube 10.

[0035] The limiting mechanism 8 is provided with a clearance member 801 to prevent the smart fuse tube from being exposed to air; the limiting mechanism 8 is also provided with a limiting protrusion 802 to prevent the smart fuse tube 10 from excessively squeezing the upper contact assembly 7.

[0036] Reference Figure 2 The upper contact assembly 7 includes an upper fixing plate 701, a spring 702 and a spring contact plate 703; the spring 702 is disposed between the upper fixing plate 701 and the spring contact plate 703.

[0037] Reference Figure 3 The lower assembly 9 includes a support 901, a spring clip 903, a trunnion 902, and an expansion pin 904, wherein:

[0038] One end of the support member 901 is connected to the lower connector of the insulating support 6; the expansion pin 904 passes through the support member 901, the trunnion 902 and the spring clip 903 in sequence, connecting the support member 901, the trunnion 902 and the spring clip 903 together; the trunnion 902 is connected to the sleeve bracket 5.

[0039] In a preferred embodiment, the sleeve support 5 is provided with a circular hole 905; the trunnion 902 is provided with a cylindrical protrusion; the circular hole 905 and the cylindrical protrusion are fitted together.

[0040] Reference Figure 4 The intelligent fuse tube includes a fuse tube body and an intelligent integrated module 3. The fuse tube body includes a release cap 1, a pull ring 2, an arc extinguishing tube 4, and a tube sleeve support 5, wherein:

[0041] The release cap 1 is set at the top of the arc extinguishing tube 3. A bolt is fixed at the top of the arc extinguishing tube 3. The release cap 1 has internal threads that cooperate with the bolt, and the release cap 1 is fixed at the top of the arc extinguishing tube 3.

[0042] The pull ring 2 includes a hollowed-out fixing component and an annular pull-down component. The hollowed-out fixing component of the pull ring 2 is sleeved on the side surface of the arc-extinguishing tube 4, and the fixing position of the pull ring 2 is adjacent to the lower part of the release cap 1. The annular pull-down component and the hollowed-out fixing component of the pull ring 2 are integrated. By pushing the annular pull-down component of the pull ring 2, the dropped smart fuse tube can be pushed into the drop-out fuse.

[0043] The intelligent integrated module 3 is provided with a hollow fixing component, which is used to attach the intelligent integrated module 3 to the fuse tube body, specifically to the side surface of the arc extinguishing tube 4.

[0044] The outer surface of the arc-extinguishing tube 4 is provided with an insulating layer, and no current passes through the outer surface. The arc-extinguishing tube 4 is not electrically connected to the intelligent integrated module 3.

[0045] The tube sleeve support 5 is provided with a hollow fixing component, which is used to fit the tube sleeve support 5 onto the bottom side surface of the arc extinguishing tube 4.

[0046] Reference Figure 5 The intelligent integrated module 3 includes a housing 302, a current sensor 303, a current transformer power supply 301, a non-contact voltage sensor 305, and a wireless communication module 304. The current sensor 303, the current transformer power supply 301, the non-contact voltage sensor 305, and the wireless communication module 304 are all housed inside the housing.

[0047] The housing 302 is generally hollow cylindrical. Circular holes are located in the center of the upper and lower surfaces of the housing 302, through which the housing 302 is fitted with the arc-extinguishing tube 4. A rectangular hole is also located on the side surface of the housing 302 for housing the non-contact voltage sensor 305 and the wireless communication module 304. To prevent external environmental corrosion and damage to the intelligent integrated module 3 through the rectangular hole, a housing sealing plate 309 is provided to seal the rectangular hole, simultaneously covering the non-contact voltage sensor 305 and the wireless communication module 304. The front, left, and right sides of the housing sealing plate 309 are rectangular, while the upper and lower surfaces that contact the housing 302 are arc-shaped, achieving a seal with the housing 302.

[0048] A hollow section is provided between the current sensor 303 and the current transformer power supply 301. Using this hollow section, the current sensor 303 and the current transformer power supply 301 are embedded on the side surface of the arc extinguishing tube 4.

[0049] The output terminal of the current transformer power supply 301 is connected to the power port of the non-contact voltage sensor 305 and the power port of the wireless communication module 304 to provide operating power. The signal output port of the non-contact voltage sensor 305 is connected to the signal input port of the wireless communication module 304 to transmit the voltage signal to the wireless communication module 304. The signal output port of the current sensor 303 is connected to the signal input port of the wireless communication module 304 to transmit the current signal to the wireless communication module 304. The wireless communication module 304 is connected to the cloud platform to upload the real-time acquired voltage and current signals to the cloud platform to realize real-time monitoring of electrical parameters such as voltage and current.

[0050] As a preferred embodiment, the current sensor 303 adopts an open-type current sensor. The open-type current sensor detects the magnetic field signal generated by the current flowing through the fuse, and then converts the magnetic field signal into a current signal through the magnetic core and sensing element, so as to realize non-contact, safe and convenient current measurement.

[0051] As a preferred embodiment, the current transformer power supply 301 adopts two sets of open-type current transformer power supplies. A fuse is inserted through the intelligent fuse tube along the axial direction. When current passes through the fuse, the alternating magnetic field induces current in the secondary coil of the open-type current transformer power supply. Without external power supply, it can provide working power for the non-contact voltage sensor 305 and the wireless communication module 304.

[0052] As a preferred embodiment, the wireless communication module 304 adopts models including but not limited to ROLA470, ROLA485, etc.

[0053] As a preferred embodiment, refer to Figure 6The non-contact voltage sensor 305 includes a sensing capacitor, a high-impedance input module, a signal conditioning module, and an output module, wherein:

[0054] The sensing capacitor is used to sense changes in charge within an electric field and generate an induced signal. The input terminal of the high-impedance input module is connected to the output port of the sensing capacitor. The induced signal is converted by the operational amplifier in the high-impedance input module to obtain an output voltage signal. The output terminal of the high-impedance input module is connected to the input terminal of the signal conditioning module. The signal conditioning module performs high-frequency phase shift correction and output impedance matching on the voltage output module to avoid self-oscillation and signal clipping on the voltage signal. The output terminal of the signal conditioning module is connected to the output module to output the monitored voltage signal.

[0055] The high-impedance input module includes a filtering module and an operational amplifier module. The input terminal of the filtering module is connected to the output port of the sensing capacitor to filter out noise and AC components in the sensing signal. The output terminal of the filtering module is connected to the input terminal of the operational amplifier module to amplify and convert the filtered sensing signal to output a voltage signal for observation. The output terminal of the operational amplifier module is connected to the input terminal of the signal conditioning module.

[0056] The filtering module includes a sixth resistor R6, a fifteenth capacitor C15, and a sixteenth capacitor C16. The first terminal of the sixth resistor R6 is connected to the sensing signal port; the second terminal of the sixth resistor R6 is connected to the first terminals of the fifteenth capacitor C15 and the sixteenth capacitor C16, and to the input terminal of the operational amplifier module; the second terminals of the fifteenth capacitor C15 and the sixteenth capacitor C16 are grounded. The sixth resistor R6 reduces current noise and common-mode noise, while also improving the stability and reliability of the circuit. The sixth resistor R6, the fifteenth capacitor C15, and the sixteenth capacitor C16 together form a π-type RC low-pass filter network, used to suppress high-frequency noise and power supply ripple in the sensing signal, thereby improving DC stability.

[0057] The operational amplifier module includes an eighteenth capacitor C18, a fourth resistor R4, a fourteenth capacitor C14, a seventeenth capacitor C17, a seventh resistor R7, a fifth resistor R5, and an operational amplifier U5. The negative input gain adjustment pin RG- of operational amplifier U5 is connected to the first terminal of the fourth resistor R4; the positive input gain adjustment pin RG+ of operational amplifier U5 is connected to the second terminal of the fourth resistor R4; the differential input negative pin IN- of operational amplifier U5 is connected to the second terminal of the fifth resistor R5; the first terminal of the fifth resistor R5 is grounded; and the differential input positive pin IN+ of operational amplifier U5 is connected to the second terminal of the sixth resistor R6. The negative power supply pin VS- of operational amplifier U5 is connected to the second terminal of the eighteenth capacitor C18 and the negative power supply VEE; the first terminal of the eighteenth capacitor C18 is grounded; the positive power supply pin VS+ of operational amplifier U5 is connected to the first terminal of the fourteenth capacitor C14 and the positive power supply VCC; the second terminal of the fourteenth capacitor C14 is grounded; the reference voltage input pin REF of operational amplifier U5 is connected to the first terminal of the seventeenth capacitor C17 and the first terminal of the seventh resistor R7; the second terminals of the seventeenth capacitor C17 and the second terminal of the seventh resistor R7 are grounded; the output pin OUT of operational amplifier U5 is connected to the first terminal of the eighth resistor R8.

[0058] The fourth resistor R4 and the fifth resistor R5 form the feedback resistor network of the operational amplifier's inverting input, used to set the closed-loop gain of the operational amplifier and adjust the signal amplification factor and bandwidth. The seventh resistor R7 and the seventeenth capacitor C17 together form the static bias resistor network, used to provide the midpoint voltage for the differential input stage, ensuring that the operational amplifier operates in the linear region; the fourteenth capacitor C14 is the positive power rail decoupling capacitor, using an X7R multilayer ceramic capacitor, used to suppress voltage fluctuations caused by transient currents and reduce power supply coupling crosstalk; the eighteenth capacitor C18 is the negative power rail decoupling capacitor, using an X7R multilayer ceramic capacitor, used to filter out low-frequency power frequency interference and high-frequency switching noise, optimizing power supply integrity.

[0059] The signal conditioning module includes resistor R8 (eighth resistor), resistor R9 (ninth resistor), and capacitor C19 (nineteenth capacitor). The first terminal of resistor R8 is connected to the output of operational amplifier U5; the second terminal of resistor R8 is connected to the first terminal of resistor R9, the first terminal of capacitor C19, and the signal output interface of the output module; the second terminals of resistor R9 and capacitor C19 are grounded. Resistor R9 and capacitor C19 together form the output stage RC compensation network, used to match the output impedance and correct high-frequency phase shift of the induced signal, avoiding self-oscillation. When correcting high-frequency phase shift, stability needs to be optimized in conjunction with the op-amp open-loop gain curve to avoid loop oscillation. Resistor R8 and resistor R9 form the output stage voltage divider feedback network, used to adjust the output voltage swing, match the load requirements of the subsequent stage, and avoid signal clipping.

[0060] As a preferred embodiment, the non-contact voltage sensor 305 can achieve high-precision non-contact voltage signal detection by adjusting the distance between the sensing capacitor and the center of the magnetic field.

[0061] In a preferred embodiment, the current sensor 303, the current transformer power supply 301, the non-contact voltage sensor 305, and the wireless communication module 304 are in contact with the outer surface of the arc-extinguishing tube 4. However, since the outer surface of the arc-extinguishing tube 4 is provided with an insulating layer, the current sensor 303, the current transformer power supply 301, the non-contact voltage sensor 305, and the wireless communication module 304 are not electrically connected to the arc-extinguishing tube 4.

[0062] In a preferred embodiment, pin holes 306 are provided on the four corners of the PCB board of the non-contact voltage sensor 305 and the wireless communication module 304. The corresponding pin holes 306 on the non-contact voltage sensor 305 and the wireless communication module 304 are connected by connecting posts 307, which realizes the layered fixation of the non-contact voltage sensor 305 and the wireless communication module 306, simplifies the housing space required for the non-contact voltage sensor 305 and the wireless communication module 306, and strengthens the robustness of the non-contact voltage sensor 305 and the wireless communication module 306.

[0063] In a preferred embodiment, both the power port and signal input port of the wireless communication module 304 are provided with terminal blocks. The terminal blocks extend the ports. When voltage signals and current signals are connected to the signal input port of the wireless communication module 304, repeated connection can be avoided through the expansion interface. When the power supply of the current transformer power supply 301 is connected to the power port of the wireless communication module 304, the connection can be extended through the terminal blocks to enable the non-contact voltage sensor 305 and the wireless communication module 304 to share a power port.

[0064] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A smart fuse tube type drop-out fuse, comprising a smart fuse tube, an insulating support, an upper contact assembly, and a lower assembly, wherein: The smart fuse tube is fixed between the lower assembly and the upper contact assembly; the upper contact assembly and the upper connector of the insulating support are connected by bolts and nuts; the spring contact piece of the upper contact assembly is in contact with the top of the smart fuse tube; one end of the lower assembly is connected to the lower connector of the insulating support by bolts and nuts; the other end of the lower assembly is connected to the tail end of the smart fuse tube. The intelligent fuse tube includes a fuse tube body and an intelligent integrated module; The intelligent integration module has a hollowed-out section in the middle, and the intelligent integration module is embedded in the fuse tube body through the hollowed-out section; The fuse tube body includes a release cap, a pull ring, an arc-extinguishing tube, and a tube sleeve support. The release cap is fixed to the top end of the arc-extinguishing tube by connecting bolts. The pull ring is sleeved on the side surface of the arc-extinguishing tube. The pull ring is adjacent to the release cap. The tube sleeve support is sleeved on the bottom side surface of the arc-extinguishing tube. The outer surface of the arc-extinguishing tube is provided with an insulating layer. The intelligent integrated module includes a housing, a current sensor, a current transformer power supply, a non-contact voltage sensor, and a wireless communication module. The housing has circular holes at the center of its upper and lower surfaces, through which it is embedded with the fuse tube body. The current sensor, current transformer power supply, non-contact voltage sensor, and wireless communication module are all located inside the housing. A hollow section is provided between the current sensor and the current transformer power supply. The current sensor and the current transformer power supply are embedded with the fuse tube body. The output terminal of the current transformer power supply is connected to the power port of the non-contact voltage sensor and the power port of the wireless communication module to provide operating power. The signal output port of the non-contact voltage sensor is connected to the signal input port of the wireless communication module to transmit the voltage signal to the wireless communication module. The signal output port of the current sensor is connected to the signal input port of the wireless communication module to transmit the current signal to the wireless communication module. The wireless communication module is connected to a cloud platform to upload the real-time acquired voltage and current signals to the cloud platform.

2. The intelligent fuse link type drop-out fuse of claim 1, wherein It also includes a limiting mechanism, which is fixed between the upper contact assembly and the upper connector of the insulating support. The limiting mechanism is provided with a clearance element to prevent the smart fuse tube from being exposed to air. The limiting mechanism is also provided with a limiting protrusion to prevent the smart fuse tube from excessively squeezing the upper contact assembly.

3. The intelligent fuse link type drop-out fuse of claim 1, wherein The upper contact assembly includes an upper fixing plate, a spring, and a spring contact plate; the spring is disposed between the upper fixing plate and the spring contact plate.

4. The intelligent fuse link type drop-out fuse of claim 1, wherein The lower assembly includes a support member, a spring clip, a trunnion, and an expansion pin, wherein: One end of the support member is connected to the lower connector of the insulating support; the expansion pin passes through the support member, the trunnion and the spring clip in sequence, connecting the support member, the trunnion and the spring clip together; the trunnion is connected to the sleeve bracket.

5. The smart fuse link tube type drop-out fuse of claim 4 wherein, The sleeve support has a circular hole; the trunnion has a cylindrical protrusion; the circular hole and the cylindrical protrusion are fitted together.

6. The smart fuse link tube type drop-out fuse of claim 1, wherein The non-contact voltage sensor includes a sensing capacitor, a high-impedance input module, a signal conditioning module, and an output module, wherein: The sensing capacitor is used to sense changes in charge within the electric field and generate a sensing signal; the high-impedance input module is used to convert the sensing signal into a voltage signal, and the input terminal of the high-impedance input module is connected to the output terminal of the sensing capacitor; the output terminal of the high-impedance input module is connected to the input terminal of the signal conditioning module; and the output terminal of the signal conditioning module is connected to the output module.

7. The smart fuse link tube type drop-out fuse of claim 1, wherein The non-contact voltage sensor and the wireless communication module are provided with pin holes; the corresponding pin holes on the non-contact voltage sensor and the wireless communication module are connected by connecting posts, which is used to fix the non-contact voltage sensor and the wireless communication module in layers.

8. The smart fuse link tube type drop-out fuse of claim 1, wherein, The current sensor, the current transformer power supply, the non-contact voltage sensor, and the wireless communication module are all not electrically connected to the fuse tube body.

9. The smart-fuse tube-type drop-out fuse of claim 1, wherein, Both the power port and the signal input port of the wireless communication module are equipped with terminal blocks, which are used for shared expansion of the ports.

Images