Single-wire bridge direct current power supply structure

Abstract

The utility model relates to bridge power supply technical field, and it is a kind of single line system bridge direct current power supply structure, and the power supply structure includes: direct current cabinet, single core cable, bridge lamps and lanterns and bridge guardrail;The direct current cabinet converts alternating current into direct current, and its anode is connected lamp anode through single core cable, cathode connects bridge guardrail, utilizes guardrail as the cathode loop of lamp. This scheme only needs single core cable, saves material and construction cost;Without complex wiring, construction efficiency is high;Line is simple, and fault troubleshooting is easy;Utilize guardrail as loop, and the anti-interference is strong, and lightning protection performance is good.

Description

Technical Field

[0001] This utility model relates to the field of bridge power supply technology, specifically to a single-wire bridge DC power supply structure. Background Technology

[0002] The existing bridge lighting and street light power supply mostly adopts the traditional AC power supply method, which has the following problems: large power grid fluctuations, unstable voltage, and serious line loss; the construction adopts a three-phase four-wire system, which requires laying multi-core cables, making the construction complex and costly; line maintenance is difficult and fault diagnosis is cumbersome. Summary of the Invention

[0003] The purpose of this utility model is to solve the above-mentioned technical problems. This utility model provides a single-wire bridge DC power supply structure to solve the above-mentioned technical problems, including: a DC cabinet, a single-core cable, a bridge lamp and a bridge railing; the DC cabinet converts AC power into DC power, its positive terminal is connected to the positive terminal of the lamp through the single-core cable, and its negative terminal is connected to the bridge railing, using the railing as the negative terminal circuit of the lamp.

[0004] Preferably, the bridge railing is connected to the grounding system, thus providing both lightning protection and anti-interference functions.

[0005] Preferably, the DC voltage output by the DC cabinet is within a safe voltage range.

[0006] Preferably, the DC power supply includes multiple DC cabinets connected in parallel, and the negative terminal of each DC power supply is connected to the bridge railing.

[0007] Beneficial effects:

[0008] 1. Compared with existing technologies, this solution significantly reduces costs, eliminating the need for three-phase four-wire + PE 5-core wire, requiring only DC + single-core wire, greatly reducing raw material and construction costs.

[0009] 2. Convenient construction and maintenance: Because the construction of the line is simpler, the maintenance is more convenient and there is no need to troubleshoot complex lines.

[0010] 3. Enhanced product anti-interference capability: Because the negative electrode utilizes bridge railings (i.e., connects the entire grounding wire), the product has good lightning protection performance and anti-interference capability, resulting in lower product reliability and failure rate.

[0011] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 A schematic diagram of a single-wire bridge DC power supply structure provided by this utility model. Detailed Implementation

[0014] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0015] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] like Figure 1 As shown, this utility model provides a single-wire DC power supply structure for bridges, including: a DC cabinet, a single-core cable, bridge lighting fixtures, and bridge railings. The DC cabinet converts AC power to DC power. Its positive terminal is connected to the positive terminal of the lighting fixture via the single-core cable, and its negative terminal is connected to the bridge railing, using the railing as the negative circuit for the lighting fixtures. This solution converts three-phase AC power supply to DC power supply in the DC cabinet. The positive terminal of the DC power supply is connected to the positive terminal of the bridge lighting fixture, and the negative terminal is connected to the bridge railing, using the entire bridge railing as the negative terminal for the lighting fixtures. This reduces line loss and offers advantages such as simple construction and easy maintenance.

[0018] The power supply structure specifically includes the following four modules:

[0019] 1. DC cabinet: Converts three-phase AC power to DC power, outputting DC positive and negative terminals;

[0020] 2. Single-wire power supply: The DC positive terminal is connected to the positive terminal of the bridge lighting fixture via a single-core cable;

[0021] 3. Guardrail circuit: The DC negative terminal is directly connected to the bridge metal guardrail, using the entire guardrail as the negative circuit for the lighting fixture;

[0022] 4. Grounding protection: The guardrail is connected to the grounding system, providing both lightning protection and anti-interference functions.

[0023] The technical solution of this utility model has the following advantages:

[0024] 1. Low cost: Only a single-core cable is required, saving on material and construction costs;

[0025] 2. Simple construction: No complicated wiring is required, and construction efficiency is high;

[0026] 3. Easy maintenance: Simple wiring and easy troubleshooting;

[0027] 4. High reliability: Utilizing the guardrail as a circuit, it has strong anti-interference ability and good lightning protection performance.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A single-wire bridge DC power supply structure, characterized in that, include: The system includes a DC cabinet, a single-core cable, bridge lighting fixtures, and bridge railings. The DC cabinet converts AC power to DC power. Its positive terminal is connected to the positive terminal of the lighting fixture via a single-core cable, and its negative terminal is connected to the bridge railing, using the railing as the negative circuit for the lighting fixture. The bridge railing is connected to the grounding system, providing both lightning protection and anti-interference functions. The DC voltage output by the DC cabinet is within a safe voltage range.

2. The single-wire bridge DC power supply structure according to claim 1, characterized in that, The DC power supply includes multiple cabinets connected in parallel, and the negative terminal of each DC power supply is connected to the bridge railing.

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