Mobile low-voltage load-to-power supply device

Abstract

The utility model discloses a mobile low-voltage load transfer power supply device, and relates to the technical field of low-voltage load transfer power supply. Comprising a low-voltage load-to-power supply control box and a movable base mounted at the bottom of the low-voltage load-to-power supply control box, a wire inlet and a wire outlet are formed in the low-voltage load-to-power supply control box, and a mutual inductor, a knife switch and an air switch are mounted in the low-voltage load-to-power supply control box; a power supply wire enters from the wire inlet and is detachably connected with the knife switch, the knife switch is connected with the mutual inductor through a wire, the mutual inductor is connected with the air switch through a wire, and a load wire enters from the wire outlet and is detachably connected with the air switch. The mobile low-voltage load power supply switching device can replace a generator car, a bypass is applied to a power failure line in a power supply switching mode, meanwhile, quick switching between different transformer areas can be achieved, and load transfer is effectively achieved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage load transfer technology, and in particular to a mobile low-voltage load transfer device. Background Technology

[0002] In recent years, to ensure the reliability and stability of power supply, large-scale transformer substation renovation projects have been carried out. These projects mainly include capacity expansion and upgrading of transformers, re-segmentation of 400V lines, and load adjustment. Implementing these projects not only helps improve the power grid's supply capacity but also significantly reduces power outage time caused by insufficient power.

[0003] Currently, the implementation of projects such as transformer capacity expansion, 400V line re-segmentation, and load adjustment necessitates the use of mobile generators for temporary power supply to avoid user power outages. However, this approach faces numerous challenges, including insufficient numbers of generators, high costs, and complex maintenance. Therefore, there is an urgent need to develop a mobile low-voltage distribution area transfer device to enable rapid switching and effective load transfer between different distribution areas. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a mobile low-voltage load transfer device that can quickly switch between different transformer substations and effectively transfer loads.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mobile low-voltage load transfer power supply device includes a low-voltage load transfer power supply control box and a mobile base installed at the bottom of the low-voltage load transfer power supply control box; the low-voltage load transfer power supply control box is provided with an inlet and an outlet, and is equipped with a current transformer, a knife switch, and an air switch; the power supply wire enters through the inlet and is detachably connected to the knife switch, the knife switch is connected to the current transformer through a wire, the current transformer is connected to the air switch through a wire, and the load wire enters through the outlet and is detachably connected to the air switch.

[0007] Furthermore, the low-voltage load power supply control box is also equipped with a meter, which is connected to the knife switch, current transformer and air switch via wires.

[0008] Furthermore, the movable base includes a base and a support rod assembly. The four corners of the bottom of the base are equipped with casters with brakes, and the support rod assembly is installed at the center of the top of the base. The support rod assembly is connected to the bottom of the low-voltage load power transfer control box through the support rod assembly.

[0009] Furthermore, a lifting power supply box is installed at the bottom of the base, and a battery and a first electric cylinder control board connected to the battery are installed inside the lifting power supply box; the support rod assembly includes a support rod installed on the bottom, the support rod is a hollow rectangular tube, and a lifting control electric cylinder and a lifting rod are installed inside it; the bottom of the lifting rod is inserted into the support rod and is fixedly connected to the telescopic rod of the lifting control electric cylinder; the lifting electric cylinder is connected to the control board inside the lifting power supply box through wiring inside the base.

[0010] Furthermore, a connecting frame is installed at the bottom of the low-voltage load power supply control box, and a lifting connecting platform is fixedly installed at the top of the lifting rod. The front side of the bottom of the connecting frame is hinged to the lifting connecting platform, and the rear side is connected to the lifting connecting platform through a flipping assembly.

[0011] Furthermore, the flipping assembly includes a flipping power box installed on one side of the lifting connecting platform, a battery installed inside the flipping power box, a second electric cylinder control board connected to the battery, and a flipping control electric cylinder; the telescopic rod of the flipping control electric cylinder passes through the flipping power box and is hinged to the rear side of the bottom of the connecting frame.

[0012] This mobile low-voltage load transfer device has the following beneficial effects:

[0013] The mobile low-voltage load transfer power supply device features a base equipped with casters, allowing for easy movement between different locations. The low-voltage load transfer power supply control box integrates current transformers, knife switches, and air switches, enabling electrical connection between the power supply conductors and load conductors to achieve low-voltage load transfer power supply. Simultaneously, the built-in meter can monitor data such as current, voltage, and power in real time.

[0014] The power supply line of this mobile low-voltage load transfer device can be connected from the main cable or the generator vehicle, making it quite flexible in use. At the same time, with the lifting control cylinder and the tilting control cylinder, the entire low-voltage load transfer control box can be lifted and tilted, thus adapting to different terrains and environments.

[0015] The manufacturing cost of this mobile low-voltage load transfer device is only 1 / 20 of that of a generator truck, making it relatively inexpensive. The introduction of this mobile low-voltage load transfer device not only improves the flexibility and security of the power supply system, but also effectively reduces operating costs, providing a strong guarantee for the stable operation of the power grid. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the mobile low-voltage load transfer power supply device of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the low-voltage load power transfer control box of this utility model;

[0019] Figure 3 and Figure 4 This is a schematic diagram of the structure of the movable base of this utility model;

[0020] In the diagram: 1. Low-voltage load power supply control box; 2. Movable base; 3. Inlet port; 4. Outlet port; 5. Current transformer; 6. Knife switch; 7. Air switch; 8. Meter; 9. Base; 10. Casters; 11. Lifting power supply box; 12. Support rod; 13. Lifting rod; 14. Connecting frame; 15. Lifting connecting platform; 16. Hinge shaft; 17. Tilting power supply box; 18. Tilting control cylinder. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0022] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, in the absence of conflict, the embodiments and features and technical solutions in the embodiments of this utility model can be combined with each other. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] This embodiment provides a mobile low-voltage load power transfer device, such as... Figure 1 As shown, this mobile low-voltage load transfer power supply device comprises two parts: a low-voltage load transfer power supply control box 1 and a mobile base 2 installed at the bottom of the low-voltage load transfer power supply control box 1. The low-voltage load transfer power supply control box 1 is the core component of this device, used to connect the power supply wires and the load wires, and responsible for controlling the transfer and distribution of power. The mobile base 2 provides the equipment with mobility, ensuring that it can be moved, lifted, and flipped on-site, thereby meeting the construction environment requirements of various transformer substation renovation projects.

[0024] Specifically, such as Figure 1 As shown, the low-voltage load power supply control box 1 in this embodiment has a rectangular box body, which is made entirely of insulating and fireproof material. The top of the box body is equipped with a cover made of transparent insulating material, which is hinged to the box body. Figure 2 As shown, the low-voltage load power transfer control box 1 has an inlet 3 and an outlet 4. Inside, it houses a current transformer 5, a knife switch 6, and an air circuit breaker 7. These components are commercially available, such as a Schneider TCT5000 current transformer, an ABB SACE Tmax XT knife switch, or a Chint NSX 100 air circuit breaker. The power supply conductor enters through the inlet 3 and is detachably connected to the knife switch 6. The knife switch 6 is connected to the current transformer 5 via a conductor, and the current transformer 5 is connected to the air circuit breaker 7 via a conductor. The load conductor enters through the outlet 4 and is detachably connected to the air circuit breaker 7. The power supply conductor and the load conductor are electrically connected through the current transformer 5, the knife switch 6, and the air circuit breaker 7, thus enabling the low-voltage load power transfer. During the low-voltage load power transfer process, the knife switch 6 is used to quickly cut off the current to ensure safety; the current transformer 5 is used to measure electrical parameters such as current or voltage and to convert signals; the air switch 7 is used for overload and short-circuit protection, cutting off the power supply to prevent equipment damage.

[0025] In addition, such as Figure 2 As shown in the preferred embodiment, a meter 8 is also installed in the low-voltage load power transfer control box 1. The meter 8 can be a Haixing Electronics EM200 type meter, which is connected to the knife switch 6, the current transformer 5, and the air switch 7 via wires. Through its connection with the knife switch 6, the current transformer 5, and the air switch 7, the meter 8 can accurately measure the consumption of electrical energy and changes in current, providing data support for power management.

[0026] Furthermore, the movable base 2 in this embodiment adopts the following structure:

[0027] like Figure 1 , Figure 3 and Figure 4 As shown, the movable base 2 in this embodiment includes a base 9 and a support rod assembly. The base 9 has a crescent-shaped plate structure, which serves as a basic support structure, providing stability and load-bearing capacity. Four corners at the bottom of the base 9 are equipped with braked casters 10. The casters 10 can be Goodyear 75mm casters with brakes, facilitating equipment movement and providing a fixing function when stability is required. A support rod assembly is installed at the top center of the base 9, which connects to the bottom of the low-voltage load power transfer control box 1, enabling the low-voltage load power transfer control box 1 to be raised, lowered, and tilted, facilitating use in different environments.

[0028] Implementation of lifting function: such as Figure 3 and Figure 4 As shown, in this embodiment, a lifting power supply box 11 is installed at the bottom of the base 9. The lifting power supply box 11 contains a battery and a first electric cylinder control board connected to the battery. The support rod assembly includes a support rod 12 installed at the bottom. The support rod 12 is a hollow rectangular tube, inside which a lifting control electric cylinder and a lifting rod 13 are installed. The lifting control electric cylinder is installed at the lower part of the support rod 12, and the bottom of the lifting rod 13 is inserted into the support rod 12 and fixedly connected to the telescopic rod of the lifting control electric cylinder. The lifting electric cylinder is connected to the control board inside the lifting power supply box 11 via wiring inside the base 9. The first electric cylinder control board is equipped with a remote control, which controls the start of the lifting control electric cylinder, thereby causing the lifting rod 13 to raise and lower the low-voltage load power supply control box 1 relative to the support rod 12 and the base 9.

[0029] Implementation of the flip function: such as Figure 3 and Figure 4 As shown, to ensure that the lifting and tilting functions can be implemented simultaneously, a connecting frame 14 is installed at the bottom of the low-voltage load power supply control box 1 in this embodiment, and a lifting connecting platform 15 is fixedly installed at the top of the lifting rod 13. The front bottom of the connecting frame 14 is hinged to the lifting connecting platform 15 via a hinge shaft 16, and the rear bottom is connected to the lifting connecting platform 15 via a tilting assembly, thereby ensuring that the lifting and tilting functions do not interfere with each other. Figure 3 and Figure 4 As shown, the flipping assembly in this embodiment includes a flipping power supply box 17 installed on one side of the lifting connecting platform 15. A battery is installed inside the flipping power supply box 17, along with a second electric cylinder control board connected to the battery, and a flipping control electric cylinder 18. The telescopic rod of the flipping control electric cylinder 18 passes through the flipping power supply box 17 and is hinged to the rear side of the bottom of the connecting frame 14. The second electric cylinder control board is equipped with a remote control, which controls the activation of the flipping control electric cylinder 18, thereby causing the connecting frame 14 to flip relative to the support rod 12 and the base 9 around the hinge axis 16.

[0030] It should be noted that the battery, electric cylinder control board, and electric cylinder in the mobile base 2 are all commercially available finished products, such as: SMC SY series electric cylinders as lifting control electric cylinders, Festo DGS series electric cylinders as tilting control electric cylinders, and TE electric cylinder controllers and Leoch Gel Battery 12V batteries for power supply and control.

[0031] In summary, this mobile low-voltage load transfer device is transported to the transformer substation renovation site by vehicle. Based on the actual location, the device is moved to the designated position using the mobile base 2. The lifting height and tilting angle of the low-voltage load transfer control box 1 are adjusted according to wiring requirements. During wiring, the power supply wire enters through the inlet 3 and connects to the disconnect switch 6, while the load wire enters through the outlet 4 and connects to the air switch 7. The power supply wire can be connected from the main cable or a generator truck, allowing for flexible usage based on site requirements. Activating the disconnect switch 6 and air switch 7 allows the load wire to be switched to power by the power supply wire, thus isolating faulty lines or equipment and enabling rapid switching and effective load transfer between different transformer substations. Furthermore, during the power transfer process, the meter 8 accurately measures energy consumption and current changes, providing data support for power management.

[0032] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A mobile low-voltage load transfer power supply device, characterized in that: The system includes a low-voltage load power supply control box and a movable base installed at the bottom of the low-voltage load power supply control box. The low-voltage load power supply control box has an inlet and an outlet, and is equipped with a current transformer, a knife switch, and an air switch. The power supply wire enters through the inlet and is detachably connected to the knife switch. The knife switch is connected to the current transformer through a wire, and the current transformer is connected to the air switch through a wire. The load wire enters through the outlet and is detachably connected to the air switch.

2. The mobile low-voltage load transfer power supply device according to claim 1, characterized in that: The low-voltage load power supply control box is also equipped with a meter, which is connected to the knife switch, transformer and air switch through wires.

3. The mobile low-voltage load transfer power supply device according to claim 1, characterized in that: The movable base includes a base and a support rod assembly. The four corners of the bottom of the base are equipped with casters with brakes, and the support rod assembly is installed at the center of the top of the base. The support rod assembly is connected to the bottom of the low-voltage load power transfer control box.

4. The mobile low-voltage load transfer power supply device according to claim 3, characterized in that: A lifting power supply box is installed at the bottom of the base. The lifting power supply box contains a battery and a first electric cylinder control board connected to the battery. The support rod assembly includes a support rod installed on the bottom. The support rod is a hollow rectangular tube, and a lifting control electric cylinder and a lifting rod are installed inside it. The bottom of the lifting rod is inserted into the support rod and is fixedly connected to the telescopic rod of the lifting control electric cylinder. The lifting electric cylinder is connected to the control board in the lifting power supply box through wiring inside the base.

5. The mobile low-voltage load transfer power supply device according to claim 4, characterized in that: The bottom of the low-voltage load power supply control box is equipped with a connecting frame, and the top of the lifting rod is fixedly equipped with a lifting connecting platform. The front side of the bottom of the connecting frame is hinged to the lifting connecting platform, and the rear side is connected to the lifting connecting platform through a flipping assembly.

6. The mobile low-voltage load transfer power supply device according to claim 5, characterized in that: The flipping assembly includes a flipping power box installed on one side of the lifting connecting platform, a battery installed inside the flipping power box, a second electric cylinder control board connected to the battery, and a flipping control electric cylinder; the telescopic rod of the flipping control electric cylinder passes through the flipping power box and is hinged to the rear side of the bottom of the connecting frame.

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