Low-voltage power generation vehicle mobile multi-loop quick access distribution box

Abstract

The application belongs to the technical field of power distribution network emergency power protection, and discloses a low-voltage power car mobile multi-loop quick access distribution box. The main body of the device is a waterproof box, the whole machine weighs 23 kg, contains a quick plug-in total input unit, 3 independent output loops, and a 20 m long trailing cable assembly, discards the traditional copper nose bolt wiring method, and can quickly complete the power car connection without tools; a single device supports multiple low-voltage branches for synchronous temporary power supply, can be moved to a small distribution point, solves the problem of limited power car site, and the matched low-voltage power car has multiple protections of overload, short circuit and lightning protection. The application greatly shortens the emergency power protection wiring time, reduces the power generation equipment and human investment, eliminates the temporary wiring safety hazards, is suitable for various low-voltage non-power-off operation scenes such as transformer maintenance, line fault repair, summer peak power protection, emergency disaster relief, and has outstanding practicality and popularization value.

Description

Technical Field

[0001] This invention relates to the field of emergency power supply and uninterrupted power supply maintenance technology for low-voltage distribution networks in power systems, specifically to a mobile multi-circuit rapid access junction box for low-voltage generator vehicles. Background Technology

[0002] In the replacement of distribution transformers, maintenance of substations, emergency repair of line faults, and emergency power supply during peak summer seasons, low-voltage generator trucks are often required to provide temporary power to downstream users. Existing generator truck connection methods have several shortcomings: First, on-site manual wiring using copper lugs and bolts is required, involving cumbersome processes such as wire clamping and insulation wrapping, which is time-consuming and prolongs power outages for users. Second, in older residential areas, small substations, and narrow alleyways, limited working space makes it difficult for generator trucks to approach distribution equipment, and insufficient spare cables prevent connection. Third, traditional connection devices only provide single-circuit output; multiple generator trucks must be deployed for simultaneous power supply to multiple branches and buildings, resulting in high manpower and equipment costs. Fourth, temporary wiring lacks graded overload and short-circuit protection; loose wiring can easily cause overheating and leakage, posing significant safety risks. Existing equipment can only provide single-circuit temporary power supply, has poor adaptability and low operating efficiency, and cannot meet the needs of batch three-phase imbalance phase adjustment in distribution areas and simultaneous power supply for large-area line faults. Therefore, there is an urgent need for an access distribution box that integrates multiple outputs, quick plug-in / plug-out functionality, portability, and tiered safety protection to solve various on-site emergency power supply problems. Summary of the Invention

[0003] The purpose of this invention is to provide a mobile multi-circuit rapid access junction box for low-voltage generator vehicles, solving the problems of cumbersome operation, limited space, single-circuit power supply, and lack of safety protection in traditional generator vehicle access systems. This enables simultaneous and rapid power supply to multiple branches, improving the efficiency of distribution network maintenance and fault location. This invention is achieved through the following solution.

[0004] A mobile multi-circuit quick-access junction box for low-voltage generators is disclosed. The main body module adopts an outdoor waterproof and dustproof lightweight YX-AD-605022 plastic distribution box with external dimensions of 600mm×500mm×220mm and internal installation dimensions of 580mm×480mm×200mm. The entire unit weighs 23kg. Portable handles are added to both sides of the box, allowing a single person to easily carry it to confined areas around distribution cabinets and transformer substations. The sealed snap-fit ​​structure provides rainproof and insulating protection. Epoxy insulating partitions are laid inside the box, and the three-phase four-wire copper busbars are arranged in zones to achieve physical isolation between phases and avoid short-circuit hazards.

[0005] Main input connection module: The bottom of the enclosure is equipped with four-color industrial waterproof quick input plugs in yellow, green, red and blue, which can be directly matched with the standard output cable of the low-voltage generator vehicle. It adopts a plug-in locking structure, eliminating the need for tools such as crimping pliers and wrenches, and eliminating the on-site copper lug crimping process. A single person can quickly complete the power supply connection within 5 minutes.

[0006] Multi-circuit independent output module: The box is equipped with 3 sets of independent three-phase four-wire output circuits, each set is equipped with an insulated dustproof socket, which can simultaneously provide temporary power supply to multiple low-voltage branch lines and multiple residential buildings. A single generator can complete the load transfer and power supply of multiple branches.

[0007] Mobile expansion module: Equipped with two 20m long extended insulated towing cables, the generator truck can be parked outside the alley or in open space. By using the junction box, the two cables can be connected and laid near the power distribution equipment, solving the problem of generator trucks being unable to park and connect in narrow spaces.

[0008] A method for operating a mobile multi-circuit quick-access junction box for low-voltage generators, using the aforementioned mobile multi-circuit quick-access junction box, is characterized by the following standardized operating steps: Step 1: On-site setup. Place the junction box stably in a safe and flat area around the power distribution equipment, fasten the box's sealing buckles, and ensure rain protection. Step 2: Power supply introduction. Connect the generator's output four-color cable plugs to the junction box's main input interface, ensuring the plugs are rotated and locked in place. Step 3: Load connection. According to power supply requirements, connect the branch cables to be powered to the corresponding output circuit sockets in the junction box, and fasten the interface insulation protection covers. Step 4: Temporary power supply operation. Sequentially close each branch circuit switch to provide uninterrupted power to downstream users, simultaneously carrying out transformer maintenance, fault repair, and user phase adjustment operations. Step 5: Completion and dismantling. After the operation is completed, first disconnect all branch circuit switches, then unplug each branch output cable, and finally disconnect the generator's main input plug, storing the box and its associated extension cables.

[0009] The main beneficial technical effects of this invention are as follows: Significantly improved access efficiency: The adoption of tool-free quick-plug connectors eliminates the need for copper lug crimping and insulation wrapping, reducing the time required for complex multi-circuit wiring by more than 60%, and increasing emergency power supply response speed by 50%, effectively reducing the duration of power outages for users.

[0010] Lightweight and portable with strong site adaptability: The external dimensions of the enclosure are 600×500×220mm, and the entire unit weighs only 23kg, which can be transported by a single person; equipped with a 20m extended drag cable (8.5kg per cable), it is not limited by small power distribution rooms or narrow alleys, and the generator car does not need to be parked close to it, making it suitable for various old transformer substations and in-station maintenance scenarios.

[0011] Synchronous power supply from multiple sources saves on operation and maintenance resources: A single distribution box supports simultaneous power supply from three branch lines. When carrying out power supply operations for multiple buildings and multiple branch substations, there is no need to dispatch multiple generator trucks, reducing the investment of vehicles and personnel and lowering the cost of emergency power supply.

[0012] Graded protection ensures safe and controllable operation: The main incoming line is equipped with additional branch circuits for dual overload, short circuit, and lightning protection. Standardized industrial connectors replace messy temporary wiring, eliminating personal and equipment safety hazards caused by loose wiring and insulation damage.

[0013] High versatility and high promotional value: The interface is compatible with mainstream low-voltage generator vehicles on the market and various low-voltage outgoing connectors of transformers, distribution cabinets, and ring network cabinets. It is simple and easy to operate and can be put into use without professional training. It can be widely used in all scenarios of peak summer power supply, distribution network transformation, and fault repair. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the standardized operating procedures used in this invention.

[0015] Figure 2 This is a schematic diagram of the external structure of the product in this invention.

[0016] Figure 3 This is a schematic diagram of the structure of the product in this invention from one direction after the top cover is opened.

[0017] Figure 4 This is a top view of the structure of the product in this invention after the top cover is opened. Detailed Implementation

[0018] To make the technical solution of the present invention clearer and more complete, the implementation process of the device is described in detail in conjunction with the actual on-site operation scenario and the accompanying drawings.

[0019] A mobile multi-circuit rapid access junction box for low-voltage generator vehicles includes: a main box module, a main input connection module, a multi-circuit independent output module, and a mobile expansion module; the main input connection module, the multi-circuit independent output module, and the mobile expansion module are located inside the main box module.

[0020] The main body of the enclosure is made of lightweight outdoor waterproof and dustproof YX-AD-605022 plastic distribution box. The external dimensions are 600mm×500mm×220mm, and the internal installation dimensions are 580mm×480mm×200mm. The whole unit weighs 23kg. Portable handles are added to both sides of the enclosure, which can be easily carried by a single person to work in narrow areas around the distribution cabinet and transformer. The sealed snap-fit ​​structure has rainproof and insulation protection performance. The inside of the enclosure is lined with epoxy insulation partitions, and the three-phase four-wire copper busbars are arranged in sections to achieve physical isolation between phases and avoid the risk of short circuit.

[0021] Main input connection module: The bottom of the enclosure is equipped with four-color industrial waterproof quick input plugs in yellow, green, red and blue, which can be directly matched with the standard output cable of the low-voltage generator vehicle. It adopts a plug-in locking structure, eliminating the need for tools such as crimping pliers and wrenches, and eliminating the on-site copper lug crimping process. A single person can quickly complete the power supply connection within 5 minutes.

[0022] Multi-circuit independent output module: The box is equipped with 3 sets of independent three-phase four-wire output circuits, each set is equipped with an insulated dustproof socket, which can simultaneously provide temporary power supply to multiple low-voltage branch lines and multiple residential buildings. A single generator can complete the load transfer and power supply of multiple branches.

[0023] Mobile expansion module: Equipped with two 20m long extended insulated towing cables, the generator truck can be parked outside the alley or in open space. By using the junction box, the two cables can be connected and laid near the power distribution equipment, solving the problem of generator trucks being unable to park and connect in narrow spaces.

[0024] The method of using a mobile multi-circuit quick-access junction box for low-voltage generator vehicles described in this application is as follows: S1: Homework preparation; S2: Implement safety measures on site, and lay out junction boxes and cables; S3: Connect the quick-plug cable to the output terminal of the low-voltage generator and the input terminal of the junction box and lock it securely; S4: Depending on the load side conditions, select one or more cables to connect to the junction box, distribution cabinet, or low-voltage line on the load side, and cover them with dust covers. S5: Start the low-voltage generator truck and sequentially close the main switch, distribution cabinet and circuit switch to carry out uninterrupted maintenance or emergency power supply. S6: Uninterrupted power supply maintenance or emergency power restoration work completed; S7: Stop the low-voltage generator car and disconnect the main generator switch and each branch switch of the distribution cabinet in sequence. S8: Pull out all cables, record the power generation details, recover materials, clean up the site, and evacuate; S9: Homework complete.

[0025] Simplified into the following standardized operating procedures: Step 1: Equipment Placement. Maintenance personnel transport the 23kg (600×500×220mm) mobile multi-circuit quick-connect junction box and 20m extension cable to the work site. The box is moved to a safe area next to the transformer and distribution cabinet, and the door is locked for rain and dust protection. Step 2: Power Connection. The generator truck is parked in an open, unobstructed area. The 20m extension cable is extended, and the cable plugs are inserted into the main input interface at the bottom of the junction box, then tightened. Step 3: Load Distribution. The low-voltage branch lines requiring temporary power are identified, and each branch cable plug is connected to the independent output circuit of the junction box. The dustproof and insulating covers of the interfaces are then secured. Step 4: Power Supply Operation. The low-voltage generator truck is started, and the branch switches of each output circuit are sequentially closed to provide uninterrupted power to downstream users. Simultaneously, equipment maintenance and fault isolation are carried out. Step 5: Equipment Recovery. After all maintenance and emergency repair work is completed, disconnect the switches in sequence, unplug all output branch cables, and finally disconnect the main input plug of the generator car. Organize and store the cables and the enclosure, and complete the site evacuation.

[0026] This device has been used more than 30 times in power distribution network renovation, emergency power supply during high-temperature peak summer, fault repair, and emergency disaster relief. The lightweight 600×500×220mm enclosure weighs 23kg and comes with a 20m extended cable. It can stably adapt to various low-voltage temporary power supply scenarios. The equipment is stable in operation and easy to use, and is ready for widespread application. Experimental and performance comparison:

[0027] Three typical work scenarios were selected: old residential alleyways, narrow indoor power distribution rooms, and open outdoor transformer areas. Thirty on-site power supply comparison tests were conducted using the traditional single-circuit wiring scheme with copper lugs (Scheme A) and the multi-circuit fast access junction box of the present invention (Scheme B). Four core indicators were statistically analyzed: operation time, manpower input, equipment input, and safety hazards.

[0028] Table 1 Key Data Comparison Time required to complete wiring of 3 branches 42min 16min Improved efficiency of multi-circuit wiring benchmark value An increase of 61.9% Maintenance personnel required for a single operation 2 people 1 person Number of synchronous power supply branches Only one route 3 independent outputs Can the operation be carried out in narrow alleyways? The generator truck cannot get close, making construction impossible. With a 20m extension cable, normal operation is possible. Number of on-site safety hazards (30 tests) 11 times (loose wire clamps, incomplete insulation) One incident (cable accidentally touching the protective cover, no electrical risk). Number of generator trucks required for simultaneous power supply to multiple buildings 3 units 1 unit In old, narrow alleyways, only small vehicles can park on-site. Traditional solutions make it impossible for generator trucks to get close enough to carry out power supply work. With this device, the generator truck is parked at the alley entrance, and the junction box is placed next to the transformer using a 20m extended cable. A single person can complete the connection and power supply of three residential branch lines in 15 minutes, without any bolt pressing or insulation wrapping procedures.

[0029] Experiments show that, compared with traditional temporary wiring methods, the present invention has significant advantages in terms of operation speed, site adaptability, manpower and equipment costs, and operation safety. It is suitable for all scenarios of power grid emergency repair, transformer substation renovation, high-temperature power supply protection, and emergency disaster relief, and has high engineering promotion value.

[0030] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A mobile multi-circuit rapid access junction box for low-voltage generator vehicles, characterized in that, It includes the main body module, the main input connection module, the multi-circuit independent output module, and the mobile expansion module; the main input connection module, the multi-circuit independent output module, and the mobile expansion module are located inside the main body module.

2. The mobile multi-circuit rapid access junction box for low-voltage generators according to claim 1, characterized in that, The main body module of the enclosure adopts the YX-AD-605022 outdoor waterproof enclosure, with external dimensions of 600mm×500mm×220mm and internal dimensions of 580mm×480mm×200mm. The whole unit weighs 23kg. The enclosure is equipped with a portable handle and has an epoxy insulation partition inside to achieve physical isolation of the three-phase copper busbars.

3. The mobile multi-circuit rapid access junction box for low-voltage generators according to claim 1, characterized in that, The main input connection module is equipped with a multi-color industrial waterproof quick plug for direct connection to the output cable of the low-voltage generator vehicle, enabling tool-free and quick connection.

4. The mobile multi-circuit rapid access junction box for low-voltage generators according to claim 1, characterized in that, The multi-circuit independent output module contains three sets of three-phase four-wire independent output circuits, which can simultaneously provide temporary power to multiple circuits.

5. The mobile multi-circuit rapid access junction box for low-voltage generators according to claim 1, characterized in that, The mobile expansion module is equipped with two 20m long insulated towing cables to enable long-distance separation and deployment of the enclosure and the generator vehicle.

6. The mobile multi-circuit rapid access junction box for low-voltage generators according to claim 1, characterized in that, The enclosure is equipped with symmetrical carrying handles on both sides, allowing a single person to easily transport it to confined electrical distribution areas for work.

7. The mobile multi-circuit rapid access junction box for low-voltage generators according to claim 1, characterized in that, All input and output interfaces are equipped with insulating dustproof protective covers, which can effectively prevent moisture and dirt during outdoor operations.

8. A method for operating a mobile multi-circuit rapid access junction box for low-voltage generator vehicles, using the mobile multi-circuit rapid access junction box for low-voltage generator vehicles as described in any one of claims 1 to 7, characterized in that, The work method includes the following steps: Step 1: Move the 23kg, 600×500×220mm junction box to the vicinity of the power distribution equipment and secure it, then lock the waterproof box door. Step 2: Connect the generator output cable to the main input interface to complete the power supply; Step 3: Connect the power supply branch cables to each independent output circuit; Step 4: Close the low-voltage generator switch to carry out uninterrupted power supply maintenance work; Step 5: After the operation is completed, disconnect the low-voltage generator switch, unplug the cable, and store the box and the 20m extended drag cable in sequence.

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