Intelligent fuse tube and drop-out fuse

Abstract

The invention discloses an intelligent fuse tube and a drop-out fuse. The intelligent fuse tube comprises a fuse tube main body and an intelligent integrated module, the intelligent integrated module comprises a shell, a current sensor, a current mutual inductance power supply, a non-contact voltage sensor and a wireless communication module; the current mutual inductance power supply is connected with the non-contact voltage sensor and the wireless communication module and is used for providing a working power supply; the non-contact voltage sensor is connected with the wireless communication module and transmits a voltage signal to the wireless communication module; the current sensor is connected with the wireless communication module and transmits a current signal to the wireless communication module. The drop-out fuse comprises an intelligent fuse tube, an insulating support, an upper contact assembly, a limiting assembly and a lower assembly. According to the invention, the fuse support does not need to be replaced, the upgrading and reconstruction cost of a power grid is reduced, and the replacement process is safe and efficient. The fuse can be widely applied to the technical field of fuses.

Description

Technical Field

[0001] The present invention relates to the technical field of fuses, and in particular to an intelligent fuse tube and a drop-out fuse. Background Art

[0002] A drop-out fuse is a commonly used overload and short-circuit protection device in power systems, primarily used to protect electrical equipment such as distribution lines and transformers. Its characteristic is that when the fuse blows, the fuse tube automatically drops, forming a clear disconnection point, facilitating fault identification and repair. Traditional drop-out fuses rely on a mechanical structure (melt tube drop) to indicate faults, requiring manual inspections and failing to monitor electrical parameters in real time. With the continuous deepening of the intelligent transformation of power systems, it is necessary to collect massive amounts of grid operation data. Traditional drop-out fuses can no longer meet the intelligent needs of grid transformation. Therefore, the intelligent transformation of traditional drop-out fuses has led to the development of smart drop-out fuses.

[0003] Existing smart dropout fuses integrate intelligent components, such as sensor modules, into the support portion of the dropout fuse, creating a smart support-type dropout fuse. While this allows for real-time monitoring of electrical parameters such as voltage and current, the production cost of smart support-type dropout fuses is high. During power grid upgrades, traditional dropout fuses must be replaced with smart support-type dropout fuses, exceeding the cost ceiling. During this replacement process, workers must remove the traditional dropout fuse and install the smart support-type dropout fuse, a cumbersome operation that can easily lead to safety incidents. Summary of the Invention

[0004] In order to solve the above technical problems, the object of the present invention is to provide an intelligent fuse tube and a drop-out fuse, which does not require replacement of the fuse holder, reduces the cost of power grid upgrade and transformation, and the replacement process is safe and efficient.

[0005] The first technical solution adopted by the present invention is: an intelligent fuse tube, including a fuse tube body and an intelligent integrated module, wherein the intelligent integrated module includes a housing, a current sensor, a current mutual inductance power supply, a non-contact voltage sensor and a wireless communication module, wherein:

[0006] Circular holes are provided in the center of the upper and lower surfaces of the shell, and the shell is embedded with the fuse tube body through the circular holes;

[0007] The current sensor, the current mutual induction power supply, the non-contact voltage sensor and the wireless communication module are all arranged inside the housing;

[0008] A hollow portion is provided between the current sensor and the current mutual induction power supply; the current sensor and the current mutual induction power supply are embedded with the fuse tube body;

[0009] The output end of the current mutual induction 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 working 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 input port of the current sensor is connected to the signal input port of the wireless communication module to transmit the voltage signal to the wireless communication module;

[0010] The output port 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 the cloud platform to upload the real-time voltage signal and current signal to the cloud platform.

[0011] Furthermore, the non-contact voltage sensor includes a sensing capacitor, a high-impedance input module, a signal conditioning module and an output module, wherein:

[0012] The sensing capacitor is used to sense charge changes in 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 end of the high-impedance input module is connected to the output end of the sensing capacitor; the output end of the high-impedance input module is connected to the input end of the signal conditioning module; and the output end of the signal conditioning module is connected to the output module.

[0013] Furthermore, the fuse tube body includes a release cap, a pull ring, an arc extinguishing tube and a tube sleeve bracket, wherein:

[0014] The release cap is fixed to the top 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; and the sleeve bracket is sleeved on the bottom side surface of the arc extinguishing tube.

[0015] Furthermore, pin holes are provided on the non-contact voltage sensor and the wireless communication module; the non-contact voltage sensor is connected to the corresponding pin holes on the wireless communication module using connecting columns to fix the non-contact voltage sensor and the wireless communication module in layers.

[0016] Furthermore, the current sensor, the current mutual inductance power supply, the non-contact voltage sensor and the wireless communication module are not electrically connected to the fuse tube body.

[0017] Furthermore, the power port of the wireless communication module and the signal input port of the wireless communication module are both provided with a wiring block, and the wiring block is used for common expansion of the ports.

[0018] The second technical solution adopted by the present invention is: an intelligent drop-out fuse, including an intelligent fuse tube, an insulating support, an upper contact assembly, a limit assembly and a lower assembly, wherein:

[0019] The smart fuse tube is fixed between the lower assembly and the upper contact assembly; the upper contact assembly, the upper connector of the insulating support and the limit assembly are connected in sequence from top to bottom by bolts and nuts; the release cap of the smart fuse tube is in contact with the spring contact piece of the upper contact assembly; 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 sleeve bracket of the smart fuse tube.

[0020] Furthermore, the upper contact assembly includes an upper fixing piece, a spring and a spring contact piece; the spring is provided between the upper fixing piece and the spring contact piece.

[0021] Furthermore, the lower assembly includes a support member, a spring clip, an ear shaft and an expansion pin, wherein:

[0022] 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 ear shaft and the spring clip in sequence to connect the support member, the ear shaft and the spring clip together in series; the ear shaft is connected to the sleeve bracket.

[0023] Furthermore, a circular hole is provided on the sleeve bracket; a cylindrical protrusion is provided on the ear shaft; and the circular hole is engaged with the cylindrical protrusion.

[0024] The present invention has the following beneficial effects: the present invention proposes an intelligent fuse tube that uses a current mutual induction power supply to power a non-contact voltage sensor and a wireless communication module, thereby eliminating the need for online real-time monitoring to rely on batteries. The current sensor monitors the current signal of the power grid in real time, thereby realizing non-contact acquisition of the power grid current signal. The non-contact voltage sensor monitors the voltage signal of the power grid in real time, thereby realizing non-contact acquisition of the power grid voltage signal. The wireless communication module uploads the collected current and voltage signals to a cloud platform, enabling power grid personnel to monitor the power grid operation status in real time. By integrating the current sensor, current mutual induction power supply, non-contact voltage sensor, and wireless communication module into the fuse tube body, when upgrading and renovating the power grid, it is unnecessary to replace the insulating support of the traditional drop-out fuse. The power grid upgrade and renovation can be completed by simply replacing the fuse tube with the intelligent fuse tube, thereby reducing technical costs. The power grid upgrade process can be completed by simply plugging and unplugging the fuse tube, making the replacement process safe and efficient. In addition, since there is no contact between the intelligent integrated module and the high-voltage electrical signal, the intelligent integrated module can operate normally in a low-voltage environment, thereby extending the service life of the intelligent integrated module.

[0025] The present invention proposes an intelligent drop-out fuse that can monitor the voltage and current signals of the power grid in real time, and can provide timely feedback to power grid staff when power theft, circuit failure, etc. occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of an intelligent fuse tube according to the present invention;

[0027] Figure 2 This is a structural diagram of an intelligent integrated module of an intelligent fuse tube according to the present invention;

[0028] Figure 3 It is a structural diagram of an intelligent drop-out fuse of the present invention;

[0029] Figure 4 This is a schematic structural diagram of an upper contact assembly of an intelligent drop-out fuse according to the present invention;

[0030] Figure 5 This is a schematic structural diagram of a lower assembly of an intelligent drop-out fuse according to the present invention;

[0031] Figure 6 This is a circuit diagram of a non-contact voltage sensor of an intelligent fuse tube of the present invention;

[0032] Description of the drawings: 1. Release cap; 2. Pull ring; 3. Intelligent integrated module; 4. Arc extinguishing tube; 5. Sleeve bracket; 6. Insulation support; 7. Upper contact assembly; 8. Limit assembly; 9. Lower assembly; 10. Intelligent fuse tube; 301. Current mutual induction power supply; 302. Housing; 303. Current sensor; 304. Wireless communication module; 305. Contactless voltage sensor; 306. Pin hole; 307. Connecting column; 308. Terminal block; 309. Housing sealing plate; 701. Upper fixing plate; 702, spring; 703, spring contact piece; 901, support member; 902, ear shaft; 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 DESCRIPTION

[0033] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0036] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0037] Reference Figure 1 , an intelligent fuse tube, including a fuse tube body and an intelligent integrated module 3, the fuse tube body including a release cap 1, a pull ring 2, an arc extinguishing tube 4 and a tube sleeve bracket 5, wherein:

[0038] The release cap 1 is arranged on the top of the arc extinguishing tube 3 , and a bolt is fixed on the top of the arc extinguishing tube 3 . The release cap 1 has threads inside, and the threads match the bolts, so that the release cap 1 is fixed on the top of the arc extinguishing tube 3 .

[0039] The pull ring 2 includes a hollow fixing component and an annular pull-down component. The hollow fixing component of the pull ring 2 is sleeved on the side surface of the arc extinguishing tube 4, and the fixed position of the pull ring 2 is adjacent to the bottom of the release cap 1. The annular pull-down component and the hollow fixing component of the pull ring 2 are integrally connected. 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.

[0040] The intelligent integrated module 3 is provided with a hollow fixing component, which is used to sleeve the intelligent integrated module 3 on the fuse tube body, specifically on the side surface of the arc extinguishing tube 4.

[0041] An insulating layer is provided on the outer surface of the arc-extinguishing tube 4 , and no current flows through the outer surface. The arc-extinguishing tube 4 is not electrically connected to the intelligent integrated module 3 .

[0042] The sleeve bracket 5 is provided with a hollow fixing component for sleeve-fitting the sleeve bracket 5 onto the bottom end side surface of the arc-extinguishing tube 4 .

[0043] Reference Figure 2 The intelligent integrated module 3 includes a housing 302, a current sensor 303, a current mutual induction power supply 301, a non-contact voltage sensor 305, and a wireless communication module 304. The current sensor 303, the current mutual induction power supply 301, the non-contact voltage sensor 305, and the wireless communication module 304 are all arranged inside the housing, wherein:

[0044] The housing 302 is generally hollow cylindrical, with circular holes centrally located on its upper and lower surfaces. The housing 302 engages the arc-extinguishing tube 4 through these holes. A rectangular hole is also located on the side of the housing 302, housing the non-contact voltage sensor 305 and wireless communication module 304. To prevent environmental damage to the intelligent integrated module 3 through the rectangular hole, a housing sealing plate 309 is provided to seal the rectangular hole and simultaneously cover the non-contact voltage sensor 305 and wireless communication module 304. The front, left, and right sides of the housing sealing plate 309 are rectangular, with the upper and lower surfaces forming an arc-shaped contact with the housing 302, ensuring a seal with the housing 302.

[0045] A hollow portion is provided between the current sensor 303 and the current mutual induction power supply 301 . The current sensor 303 and the current mutual induction power supply 301 are embedded on the side surface of the arc extinguishing tube 4 by utilizing the hollow portion.

[0046] The output end of the current mutual inductance 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 working 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 signal and current signal to the cloud platform to realize real-time monitoring of electrical parameters such as voltage and current.

[0047] As a preferred embodiment, the current sensor 303 adopts an open-type current sensor, which 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 a magnetic core and an inductive element, thereby realizing non-contact, safe and convenient current measurement.

[0048] As a preferred embodiment, the current mutual induction power supply 301 uses two sets of open-type current mutual induction power supplies. A fuse is provided inside the smart 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 mutual induction power supply. Without the need for external power supply, it can provide working power for the non-contact voltage sensor 305 and the wireless communication module 304.

[0049] As a preferred embodiment, the wireless communication module 304 adopts models including but not limited to ROLA470, ROLA485, etc.

[0050] As a preferred embodiment, refer to Figure 6 The non-contact voltage sensor 305 includes a sensing capacitor, a high-impedance input module, a signal conditioning module, and an output module, wherein:

[0051] The sensing capacitor is used to sense the charge change in the electric field and generate an induction signal; the input end of the high-impedance input module is connected to the output port of the sensing capacitor, and the induction signal is converted by the operational amplifier in the high-impedance input module to obtain an output voltage signal; the output end of the high-impedance input module is connected to the input end of the signal conditioning module, and the signal conditioning module performs high-frequency phase offset correction and output impedance matching on the voltage output module to avoid self-oscillation and signal clipping on the voltage signal; the output end of the signal conditioning module is connected to the output module to output the monitored voltage signal.

[0052] The high-impedance input module includes a filtering module and an operational amplifier module. The input end of the filtering module is connected to the output port of the sensing capacitor, and the clutter and AC components in the sensing signal are filtered out through the filtering module; the output end of the filtering module is connected to the input end of the operational amplifier module, and the filtered sensing signal is amplified and converted to output a voltage signal to facilitate observation of the filtered sensing signal; the output end of the operational amplifier module is connected to the input end of the signal conditioning module.

[0053] The filtering module includes a sixth resistor R6, a fifteenth capacitor C15, and a sixteenth capacitor C16. The first end of the sixth resistor R6 is connected to the sensing signal port; the second end of the sixth resistor R6 is connected to the first end of the fifteenth capacitor C15, the first end of the sixteenth capacitor C16, and the input end of the operational amplifier module; the second end of the fifteenth capacitor C15 and the second end of the sixteenth capacitor C16 are grounded. The sixth resistor R6 reduces current noise and common-mode noise, while also improving circuit stability and reliability. The sixth resistor R6, the fifteenth capacitor C15, and the sixteenth capacitor C16 together form a π-type RC low-pass filter network, which is used to suppress high-frequency noise and power supply ripple in the sensing signal and improve DC stability.

[0054] 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 the operational amplifier U5 is connected to the first end of the fourth resistor R4; the positive input gain adjustment pin RG+ of the operational amplifier U5 is connected to the second end of the fourth resistor R4; the differential input negative pin IN- of the operational amplifier U5 is connected to the second end of the fifth resistor R5; the first end of the fifth resistor R5 is grounded; and the differential input positive pin IN+ of the operational amplifier U5 is connected to the second end of the sixth resistor R6. The negative power supply pin VS- of the operational amplifier U5 is connected to the second end of the eighteenth capacitor C18 and the negative power supply VEE; the first end of the eighteenth capacitor C18 is grounded; the positive power supply pin VS+ of the operational amplifier U5 is connected to the first end of the fourteenth capacitor C14 and the positive power supply VCC; the second end of the fourteenth capacitor C14 is grounded; the reference voltage input pin REF of the operational amplifier U5 is connected to the first end of the seventeenth capacitor C17 and the first end of the seventh resistor R7; the second end of the seventeenth capacitor C17 and the second end of the seventh resistor R7 are grounded; and the output pin OUT of the operational amplifier U5 is connected to the first end of the eighth resistor R8.

[0055] The fourth resistor R4 and the fifth resistor R5 form a feedback resistor network at the inverting terminal of the operational amplifier, which is 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 a static bias resistor network, which is used to provide a midpoint voltage for the differential input stage and ensure that the operational amplifier operates in the linear region. The fourteenth capacitor C14 is a positive power rail decoupling capacitor, which uses an X7R multilayer ceramic capacitor to suppress voltage fluctuations caused by transient current and reduce power supply coupling crosstalk. The eighteenth capacitor C18 is a negative power rail decoupling capacitor, which uses an X7R multilayer ceramic capacitor to filter out low-frequency power frequency interference and high-frequency switching noise, optimizing power integrity.

[0056] The signal conditioning module includes an eighth resistor R8, a ninth resistor R9, and a nineteenth capacitor C19. The first end of the eighth resistor R8 is connected to the output end of the operational amplifier U5; the second end of the eighth resistor R8 is connected to the first end of the ninth resistor R9, the first end of the nineteenth capacitor C19, and the signal output interface of the output module; the second end of the ninth resistor R9 and the second end of the nineteenth capacitor C19 are grounded. The ninth resistor R9 and the nineteenth capacitor C19 together form an output stage RC compensation network, which is used to match the output impedance and correct the high-frequency phase offset of the induced signal to avoid self-oscillation. When correcting the high-frequency phase offset, it is necessary to optimize the stability in combination with the open-loop gain curve of the operational amplifier to avoid loop oscillation. The eighth resistor R8 and the ninth resistor R9 form an output stage voltage divider feedback network, which is used to adjust the output voltage swing, match the subsequent load requirements, and avoid signal clipping.

[0057] 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.

[0058] As a preferred embodiment, the current sensor 303, the current mutual inductance 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, but since the outer surface of the arc-extinguishing tube 4 is provided with an insulating layer, the current sensor 303, the current mutual inductance 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.

[0059] As a preferred embodiment, pin holes 306 are provided on the four corners of the PCB boards 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 through connecting columns 307, thereby realizing layered fixation of the non-contact voltage sensor 305 and the wireless communication module 306, streamlining the housing space required for the non-contact voltage sensor 305 and the wireless communication module 30, and enhancing the firmness of the non-contact voltage sensor 305 and the wireless communication module 306.

[0060] As a preferred embodiment, the power port and signal input port of the wireless communication module 304 are both provided with a terminal block, which expands the port. When the voltage signal and the current signal are connected to the signal input port of the wireless communication module 304, repeated access can be avoided through the expansion interface; when the power supply of the current mutual induction power supply 301 is connected to the power port of the wireless communication module 304, the non-contact voltage sensor 305 and the wireless communication module 304 can share a power port through the expansion of the terminal block.

[0061] Reference Figure 3 , an intelligent drop-out fuse, comprising an intelligent fuse tube 10, an insulating support 6, an upper contact assembly 7, a limit assembly 8, and a lower assembly 9, wherein:

[0062] The smart 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 limit assembly 8 are all provided with circular holes for the passage of bolts, through which the upper contact assembly 7, the upper connector of the insulating support 6 and the limit assembly 8 are fixedly connected from top to bottom in sequence by bolts and nuts; the release cap 1 of the smart fuse tube 10 is in contact and connected 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 circular holes for the passage of bolts, through which one end of the lower assembly 9 and the lower connector of the insulating support 6 are fixedly connected by bolts and nuts; the other end of the lower assembly 9 is connected to the sleeve bracket 5 of the smart fuse tube 10.

[0063] Reference Figure 4 The upper contact assembly 7 includes an upper fixing piece 701 , a spring 702 and a spring contact piece 703 ; the spring 702 is provided between the upper fixing piece 701 and the spring contact piece 703 .

[0064] Reference Figure 5 The lower assembly 9 includes a support member 901, a spring clip 903, an ear shaft 902 and an expansion pin 904, wherein:

[0065] 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 ear shaft 902 and the spring clip 903 in sequence, connecting the support member 901, the ear shaft 902 and the spring clip 903 together in series; the ear shaft 902 is connected to the sleeve bracket 5.

[0066] As a preferred embodiment, a circular hole 905 is provided on the sleeve bracket 5; a cylindrical protrusion is provided on the ear shaft 902; and the circular hole 905 is engaged with the cylindrical protrusion.

[0067] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A smart fuse tube, characterized in that: The device comprises a fuse tube body and an intelligent integrated module, wherein the intelligent integrated module comprises a housing, a current sensor, a current mutual inductance power supply, a non-contact voltage sensor and a wireless communication module, wherein: Circular holes are provided in the center of the upper and lower surfaces of the shell, and the shell is embedded with the fuse tube body through the circular holes; The current sensor, the current mutual induction power supply, the non-contact voltage sensor and the wireless communication module are all arranged inside the housing; A hollow portion is provided between the current sensor and the current mutual induction power supply; the current sensor and the current mutual induction power supply are embedded with the fuse tube body; The output end of the current mutual inductance 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 working 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 the cloud platform to upload the voltage signal and current signal obtained in real time to the cloud platform.

2. The smart fuse tube according to claim 1, characterized in that: 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 charge changes in 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 end of the high-impedance input module is connected to the output end of the sensing capacitor; the output end of the high-impedance input module is connected to the input end of the signal conditioning module; and the output end of the signal conditioning module is connected to the output module.

3. The smart fuse tube according to claim 1, characterized in that: The fuse tube body includes a release cap, a pull ring, an arc extinguishing tube and a tube sleeve bracket, wherein: The release cap is fixed to the top 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; and the sleeve bracket is sleeved on the bottom side surface of the arc extinguishing tube.

4. The smart fuse tube according to claim 1, characterized in that: Pin holes are provided on the non-contact voltage sensor and the wireless communication module; the non-contact voltage sensor is connected to the corresponding pin holes on the wireless communication module using connecting columns to fix the non-contact voltage sensor and the wireless communication module in layers.

5. The smart fuse tube according to claim 1, characterized in that: The current sensor, the current mutual inductance power supply, the non-contact voltage sensor and the wireless communication module are not electrically connected to the fuse tube body.

6. The smart fuse tube according to claim 1, characterized in that: The power port of the wireless communication module and the signal input port of the wireless communication module are both provided with a wiring block, and the wiring block is used for common expansion of the ports.

7. An intelligent drop-out fuse, comprising the intelligent fuse tube according to any one of claims 1 to 6, characterized in that: It also includes an insulating support, an upper contact assembly, a limit 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, the upper connector of the insulating support and the limit assembly are connected in sequence from top to bottom by bolts and nuts; the release cap of the smart fuse tube is in contact with the spring contact piece of the upper contact assembly; 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 sleeve bracket of the smart fuse tube.

8. The intelligent drop-out fuse according to claim 7, characterized in that: The upper contact assembly includes an upper fixing piece, a spring and a spring contact piece; the spring is arranged between the upper fixing piece and the spring contact piece.

9. The intelligent drop-out fuse according to claim 7, characterized in that: 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 ear shaft and the spring clip in sequence to connect the support member, the ear shaft and the spring clip together in series; the ear shaft is connected to the sleeve bracket.

10. The intelligent drop-out fuse according to claim 9, characterized in that: The sleeve bracket is provided with a circular hole; the ear shaft is provided with a cylindrical protrusion; the circular hole is engaged with the cylindrical protrusion.

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