Miniaturized low-voltage-to-power-supply quick access device and method

Abstract

The invention discloses a miniaturized low-voltage-to-power-supply quick access device and method. The device comprises a mounting assembly fixed to a telegraph pole. The circuit breaking assembly is arranged in the mounting assembly and realizes electrical connection; wherein one side of the installation assembly is provided with a fixing piece to form adaptive connection with a telegraph pole, and the circuit breaking assembly is internally provided with an aviation interface to realize rapid plugging connection with an external circuit. The device is rapidly fixed through the fixing piece, the structure is compact and adapts to various installation environments, and the problems that traditional equipment is large in size and complex in installation are solved; the design of the aviation interface and the pre-crimping terminal realizes the plug-and-play of the generator car cable and the distribution line, thoroughly eliminates the tedious operations of wire stripping, crimping and the like, and remarkably improves the wiring efficiency.

Description

A miniaturized low-voltage power supply fast access device and method Technical Field

[0001] This invention relates to the field of fire safety, and in particular to a miniaturized low-voltage power supply quick connection device and method. Background Technology

[0002] During the maintenance and renovation of power distribution lines, using low-voltage generator trucks for temporary power transfer is a key technical measure to ensure continuous power supply for downstream users. Currently, the main technical solutions for connecting low-voltage generator trucks to the power distribution network in the industry rely on traditional terminal block type switchgear or large junction boxes. These devices are usually designed to be fixedly installed on the ground or in the power distribution room, and the generator truck is connected to the power distribution network by manual wiring to form a temporary power supply path.

[0003] However, existing switchgear or junction boxes are bulky and heavy, making them difficult to adapt to pole-mounted operations or installation requirements in narrow spaces, which severely limits the flexibility of power transfer operations. At the same time, the wiring process of switchgear is cumbersome, requiring operators to perform multiple steps such as stripping, crimping, and tightening, which affects the wiring efficiency of switchgear. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the existing switch cabinets or junction boxes are bulky and heavy, making it difficult to meet the installation requirements of pole-mounted operations or narrow spaces. At the same time, the cumbersome wiring process of the switch cabinets will affect the wiring efficiency of the switch cabinets.

[0005] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a miniaturized low-voltage power supply quick access device, which includes an installation assembly fixed to a utility pole; a circuit breaker assembly disposed within the installation assembly and electrically connected thereto; wherein, a fixing member is provided on one side of the installation assembly to form an adaptive connection with the utility pole, and an aviation interface is provided within the circuit breaker assembly to achieve quick plug-in connection with external lines.

[0006] In a preferred embodiment of the miniaturized low-voltage power transfer and rapid access device of the present invention: the installation assembly includes a housing, a cavity disposed on the inner wall of the housing, a side cavity disposed on one side of the housing, and a rotating door rotatably connected to the housing.

[0007] In a preferred embodiment of the miniaturized low-voltage power supply quick access device of the present invention: the fixing component includes a first bracket connected to the housing, a second bracket rotatably connected to the first bracket, and a bolt rotatably connected to the first bracket; the bolt is threaded to one side of the second bracket, and the installation of the fixing component and the utility pole can be adapted by adjusting the screwing depth of the bolt.

[0008] In a preferred embodiment of the miniaturized low-voltage power transfer and fast access device of the present invention: the circuit breaker assembly includes a circuit breaker disposed on the inner wall of the cavity, a terminal block disposed at the bottom of the circuit breaker, and an access line connected to the bottom of the terminal block.

[0009] In a preferred embodiment of the miniaturized low-voltage power transfer and fast access device of the present invention: the aviation interface is connected to the input terminal of the circuit breaker via a terminal block.

[0010] This invention also proposes a miniaturized low-voltage power supply rapid access method, which includes the following steps: fixing the switch cabinet at a preset position on the utility pole; inserting the generator cable plug into the aviation interface equipped in the switch cabinet; connecting the power distribution line to the access line equipped in the switch cabinet; closing the switch to supply power and activating the integrated protection system to monitor the status inside the switch cabinet.

[0011] In a preferred embodiment of the miniaturized low-voltage power transfer and rapid access method of the present invention: when fixing the switch cabinet, an adjustable clamp mechanism is used to install the access equipment on the utility pole, and the inner surface of the clamp is made to fit tightly with the outer surface of the utility pole by rotating the adjustment mechanism to form a stable mechanical connection.

[0012] In a preferred embodiment of the miniaturized low-voltage power supply quick access method of the present invention: the aviation interface has a built-in multi-contact conductive structure, the plug and the interface are reliably connected by a rotating buckle mechanism, and the elastic sealing element built into the interface forms an annular seal with the outer surface of the plug to prevent external moisture from seeping in.

[0013] In a preferred embodiment of the miniaturized low-voltage power supply quick access method of the present invention: the end of the access line is connected to the power distribution line by setting a pre-pressed terminal, and the pre-pressed terminal is provided with a spring clamping mechanism inside; wherein, when the power distribution line is connected to the pre-pressed terminal, the spring clamping mechanism automatically clamps the surface of the power distribution line to form a stable electrical connection.

[0014] In a preferred embodiment of the miniaturized low-voltage power transfer and rapid access method of the present invention: when the integrated protection system detects abnormal electrical parameters or temperature exceeding a preset threshold, it automatically triggers the protection mechanism to disconnect the circuit, and at the same time, it feeds back the fault type through a signal indication device to achieve safe and reliable power transfer.

[0015] The beneficial effects of this invention are as follows: the device can be quickly fixed by fasteners, the structure is compact and adaptable to various installation environments, and the problems of large size and complicated installation of traditional equipment are solved; the aviation interface and pre-pressed terminal design enable plug-and-play of generator cables and power distribution lines, completely eliminating tedious operations such as wire stripping and crimping, and significantly improving wiring efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Specifically: Figure 1 shows an overall structural diagram of a miniaturized low-voltage power supply quick access device; Figure 2 shows a connection diagram of the mounting assembly and the circuit breaker assembly; Figure 3 shows an overall view of the fixing component; Figure 4 shows a structural diagram of the fixing component; Figure 5 shows a flowchart of a miniaturized low-voltage power supply quick access method. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0019] Referring to Figures 1-4, this embodiment provides a miniaturized low-voltage power supply quick access device, including a mounting component 1 fixed to a utility pole. The mounting component 1 is the main support body of the switch cabinet and is directly installed on the surface of the utility pole. Its design achieves a stable connection with the utility pole, ensuring that the device has sufficient mechanical strength and wind resistance when operating on outdoor poles, avoiding loosening or falling off due to equipment shaking or external forces, while providing a safe protection space for internal electrical components.

[0020] It also includes a circuit breaker assembly 2 that is installed in the mounting assembly 1 and electrically connected; wherein, a fixing member 15 is provided on one side of the mounting assembly 1 to form an adaptive connection with the utility pole, and an aviation interface 23 is provided in the circuit breaker assembly 2 to enable quick plug-in connection with external lines.

[0021] It should be noted that the circuit breaker component 2 is the core of the electrical function, integrated inside the mounting component 1. It is responsible for safely switching the circuit on and off and provides overload / short circuit protection to ensure the electrical reliability of the power supply process.

[0022] As an alternative embodiment, how mounting component 1 is mounted onto the utility pole is described.

[0023] The installation assembly 1 includes a housing 11, a cavity 12 located on the inner wall of the housing 11, a side cavity 13 located on one side of the housing 11, and a rotating door 14 rotatably connected to the housing 11. The housing 11 is made of lightweight aluminum alloy (weight ≤15kg) to ensure single-person handling; the cavity 12 is rationally arranged with electrical components to avoid space congestion; the side cavity 13 is reserved for maintenance; and the rotating door 14 is designed to be openable and closable, allowing wiring to be completed without disassembly, significantly improving operational convenience.

[0024] The fastener 15 includes a first bracket 151 connected to the housing 11, a second bracket 152 rotatably connected to the first bracket 151, and a bolt 153 rotatably connected to the first bracket 151. The bolt 153 is threaded to one side of the second bracket 152. The fastener 15 can be installed to fit the utility pole by adjusting the screw depth of the bolt 153. The fastener 15 has a double-lobed clamp structure. Its clamping diameter can be finely adjusted by the first bracket 151 and the second bracket 152 in conjunction with the bolt 153, so that the fastener 15 can fit the diameter of the utility pole from Φ150mm to Φ300mm, which is convenient for the installation of the switch cabinet.

[0025] The circuit breaker assembly 2 includes a circuit breaker 21 disposed on the inner wall of the cavity 12, a terminal block 22 disposed at the bottom of the circuit breaker 21, and an access line 24 connected to the bottom of the terminal block 22. The circuit breaker 21 (rated 400A) provides overload / short circuit protection. The terminal block 22 serves as an electrical hub, directly connecting the aviation interface 23 and the access line 24. The access line 24 extends to the panel, forming a complete circuit of generator car-circuit breaker-load, avoiding secondary wiring on site.

[0026] The aviation interface 23 is connected to the input terminal of the circuit breaker 21 via the terminal block 22. The aviation interface 23 (industrial MC series, 4-core / 63A+) is electrically connected to the circuit breaker 21 via the terminal block 22, enabling quick plugging and unplugging of the generator cable without tools, which greatly reduces operational risks.

[0027] Referring to Figure 5, this embodiment provides a miniaturized low-voltage power supply quick connection method, including the following steps: fixing the switch cabinet to a preset position on the utility pole, wherein this step achieves quick installation of the switch cabinet through an adjustable fixing component 15. The fixing component 15 is made of 304 stainless steel. The opening size of the fixing component 15 is adjusted by rotating the bolt 153, so that the surface of the fixing component 15 fits tightly against the outer surface of the utility pole. The entire installation process does not require hoisting equipment and can be completed by a single person within 2 minutes, which is significantly more efficient than the traditional fixing method; inserting the generator cable plug into the aviation interface 23 equipped in the switch cabinet, wherein the aviation interface 23 adopts an industrial standard MC series panel-mounted plug (4-pin / 63A+), with a built-in multi-contact conductive structure and a rotating latching mechanism (insertion and extraction force ≥30N). When the plug is connected to the interface, the rotating latching mechanism locks by rotating 90° to ensure the stability of the connection. The interface is provided with an elastic sealing element, which forms a ring seal with the outer surface of the plug, effectively preventing rainwater and dust from entering. This design eliminates the cumbersome steps of traditional bolt terminal wiring, which requires wire stripping and crimping, and reduces the risk of electrical faults due to poor contact. It connects the power distribution line to the switchgear with an access line 24, the end of which is equipped with a pre-crimped terminal and an integrated spring clamping mechanism. When the power distribution line is inserted into the pre-crimped terminal, the spring clamping mechanism automatically clamps the cable surface, forming a stable electrical connection. This design eliminates the need for manual crimping tools, avoiding damage to the cable due to operational errors such as loose connections or excessive tightening. The pre-crimped terminal is compatible with wire diameters ranging from Φ1.5mm² to Φ10mm², fitting over 90% of the line specifications in the distribution network. Upon closing the circuit breaker, an integrated protection system is activated to monitor the status within the switchgear. This integrated protection system includes a Hall current sensor (accuracy ±1%), a voltage sampling module (accuracy ±0.5%), and a smart circuit breaker 21 (rated 400A, breaking capacity ≥10kA). Once the generator truck is connected, the system monitors the voltage (220V±5%), current (0-63A), and temperature (-20℃~+70℃) on both the input side (generator truck) and the output side (load) in real time. In case of an anomaly, the intelligent circuit breaker automatically trips within 0.5 seconds, cutting off the circuit. Simultaneously, the signal indicator device provides feedback on the fault type via encoding, facilitating quick problem location for operators.

[0028] When fixing the switchgear, an adjustable clamp mechanism is used to install the connected equipment on the utility pole. The inner surface of the clamp is tightly fitted to the outer surface of the pole by rotating the adjustment mechanism, forming a stable mechanical connection. The fixing component 15 is optimized through mechanical simulation design, with its curvature matching the pole's curvature to ensure maximum contact area. Bolt 153 uses an 80mm elongated circular hole groove and a stainless steel locating pin to achieve stepless adjustment, adapting to poles with diameters from Φ150mm to Φ300mm.

[0029] The aviation-grade interface features a built-in multi-contact conductive structure. The plug and interface achieve a reliable connection via a rotating snap-fit ​​mechanism. Simultaneously, the interface's built-in elastic sealing element forms a ring seal with the plug's outer surface, preventing external moisture ingress. The multi-contact conductive structure consists of six sets of gold-plated copper alloy pins with an optimized pin spacing of 3.5mm, ensuring a contact area ≥15mm² during plug insertion and removal. The rotating snap-fit ​​mechanism is made of glass fiber reinforced nylon, with a 90° snap-fit ​​angle and a lifespan of ≥500 insertion / removal cycles without wear. The elastic sealing element is integrally molded with the interface through a vulcanization process, with the sealing compression controlled between 15% and 25%, ensuring an IP54 protection rating. Salt spray testing has verified that the sealing element shows no corrosion or hardening after 500 hours in a salt spray environment.

[0030] The access cable is connected to the power distribution line via a pre-crimped terminal, which contains a spring-loaded clamping mechanism. When the power distribution line is connected to the pre-crimped terminal, the spring-loaded clamping mechanism automatically clamps the surface of the power distribution line, forming a stable electrical connection. It should be noted that the pre-crimped terminal is made of phosphor bronze, and the spring-loaded clamping mechanism is driven by two sets of helical springs, with a clamping stroke ≥3mm, suitable for wire diameters of Φ1.5mm²-Φ10mm². The inner wall of the terminal has a serrated texture to enhance clamping friction and prevent cable slippage. Tensile testing has verified that the clamping force retains ≥80% of its initial value after 1000 insertions and removals.

[0031] When the integrated protection system detects abnormal electrical parameters or temperatures exceeding preset thresholds, it automatically triggers a protection mechanism to disconnect the circuit. Simultaneously, it uses a signal indicator to report the fault type, ensuring safe and reliable power transfer. The integrated protection system uses an ARM Cortex-M4 microcontroller as its core, with a sampling frequency ≥10kHz to ensure accurate detection of abnormal parameters. The protection logic includes: overvoltage protection: tripping after a 50ms delay when the input voltage is >240V or <180V; overcurrent protection: tripping after a 100ms delay when the current is >450A; and overtemperature protection: tripping immediately when the internal temperature of the enclosure is >80℃. The signal indicator displays the fault type (red / yellow / green combination) on an RGB LED screen and sends fault codes (e.g., 0x01 = overvoltage, 0x02 = overcurrent) to a remote monitoring platform via an RS485 interface. The protection system has a false trip rate of <0.1%, improving reliability by 90% compared to traditional relay solutions.

[0032] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A miniaturized low-voltage power supply fast connection device, characterized in that: It includes an installation assembly (1) fixed to a utility pole; and a circuit breaker assembly (2) disposed within the installation assembly (1) and electrically connected thereto. The installation assembly (1) has a fixing member (15) on one side to form an adaptive connection with the utility pole, and the circuit breaker assembly (2) has an aviation interface (23) to enable quick plug-in connection with external lines.

2. The miniaturized low-voltage power supply fast access device according to claim 1, characterized in that: The installation assembly (1) includes a housing (11), a cavity (12) disposed on the inner wall of the housing (11), a side cavity (13) disposed on one side of the housing (11), and a rotating door (14) rotatably connected to the housing (11).

3. The miniaturized low-voltage power supply fast access device according to claim 2, characterized in that: The fastener (15) includes a first bracket (151) connected to the housing (11), a second bracket (152) rotatably connected to the first bracket (151), and a bolt (153) rotatably connected to the first bracket (151). The bolt (153) is threaded to one side of the second bracket (152), and the fastener (15) can be installed to fit the utility pole by adjusting the screwing depth of the bolt (153).

4. The miniaturized low-voltage power supply fast access device according to claim 3, characterized in that: The circuit breaker assembly (2) includes a circuit breaker (21) disposed on the inner wall of the cavity (12), a terminal block (22) disposed at the bottom of the circuit breaker (21), and an access line (24) connected to the bottom of the terminal block (22).

5. The miniaturized low-voltage power supply fast access device according to claim 4, characterized in that: The aviation interface (23) is connected to the input terminal of the circuit breaker (21) via a terminal block (22).

6. A miniaturized method for rapid low-voltage power supply connection, characterized in that: The device includes the miniaturized low-voltage power supply quick access device as described in any one of claims 1 to 5, and the following steps: fixing the switch cabinet to a preset position on the utility pole; inserting the generator cable plug into the aviation interface provided in the switch cabinet; connecting the power distribution line to the access line provided in the switch cabinet; closing the switch to supply power and activating the integrated protection system to monitor the status inside the switch cabinet.

7. The miniaturized low-voltage power supply rapid access method according to claim 6, characterized in that: When fixing the switch cabinet, an adjustable clamp mechanism is used to install the access equipment on the utility pole. The inner surface of the clamp is made to fit tightly with the outer surface of the utility pole by rotating the adjustment mechanism, forming a stable mechanical connection.

8. The miniaturized low-voltage power supply rapid access method according to claim 7, characterized in that: The aviation interface has a built-in multi-contact conductive structure. The plug and the interface are reliably connected through a rotating snap-fit ​​mechanism. At the same time, the elastic sealing element built into the interface forms an annular seal with the outer surface of the plug to prevent external moisture from seeping in.

9. The miniaturized low-voltage power supply rapid access method according to claim 8, characterized in that: The end of the access line is connected to the power distribution line by a pre-pressed terminal, and the pre-pressed terminal is provided with a spring clamping mechanism inside; wherein, when the power distribution line is connected to the pre-pressed terminal, the spring clamping mechanism automatically clamps the surface of the power distribution line to form a stable electrical connection.

10. The miniaturized low-voltage power supply rapid access method according to claim 9, characterized in that: When the integrated protection system detects abnormal electrical parameters or temperature exceeding a preset threshold, it automatically triggers the protection mechanism to disconnect the circuit. At the same time, it uses a signal indicator device to provide feedback on the fault type, thereby achieving safe and reliable power transfer.

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