Centralized three-phase contact rail power supply system under alternating current 3kV three-phase system

Abstract

The utility model discloses a centralized three-phase contact rail power supply system under an alternating current 3kV three-phase system, which comprises an insulating support frame for integrally supporting, a three-phase contact rail for providing a three-phase alternating current power supply, a collector shoe for transmitting electric energy and an insulating block for insulating three-phase electricity, comprising a first contact rail buckle seat, a second contact rail buckle seat and a third contact rail buckle seat, the three-phase contact rail comprises a first contact rail, a second contact rail and a third contact rail which are all C-shaped buckle type contact rails, are respectively matched with the first contact rail buckle seat, the second contact rail buckle seat and the third contact rail buckle seat and are connected through pressing buckles; the collector shoe is in contact with the three-phase contact rail by adopting a rolling type design; and the insulating block is filled between the three-phase contact rail and the insulating support frame to ensure electrical insulation. According to the system, through centralized arrangement, same-side arrangement and side current collection, the occupied space is reduced, the maintenance space is increased, and continuous arrangement of the contact rails can be achieved.

Description

Technical Field

[0001] This utility model belongs to the field of urban rail transit power supply technology, and more specifically, relates to a centralized three-phase contact rail power supply system under AC 3kV three-phase system. Background Technology

[0002] In modern urban rail transit systems, the power supply system is a core infrastructure for train operation. Traditional DC 1500V power supply systems use single-phase DC power, with the overhead contact line or contact rail as the positive terminal and the running rail or dedicated return rail as the negative terminal, requiring only positive and negative terminals to supply power. However, with increasing train speeds and energy consumption demands, the limitations of single-phase DC power supply systems in terms of power transmission efficiency and power supply stability are becoming increasingly apparent. In contrast, AC 3kV three-phase AC power supply systems, due to their high efficiency and stability, are becoming the future trend. Against this backdrop, a centralized three-phase contact rail power supply system that can adapt to the requirements of the AC 3kV three-phase standard while ensuring power supply stability and safety is particularly important.

[0003] However, for a 3kV AC traction power supply system, a three-phase power supply system requires the installation of A, B, and C phase power supply rails (lines). Current technology often uses an overhead contact network, contact rail, and running rail to construct a three-phase traction network. While the overhead contact network and running rail can be continuously arranged, the contact rail cannot provide continuous power due to limitations imposed by equipment clearances, personnel safety, and restrictions on turnout areas, air-raid shelters, and level crossings. This results in phase loss and discontinuous power supply issues in some sections of the train. Furthermore, existing three-phase power supply systems occupy space on the top and bottom of the vehicle, leading to limited installation space for tunnel equipment and occupying significant maintenance space in the tunnel sections. Additionally, the unstable relationship between the current collectors of different phases and the contact rail during train operation and swaying can easily cause arcing and erosion. Utility Model Content

[0004] In view of the above-mentioned defects or improvement needs of the existing technology, this utility model provides a centralized three-phase contact rail power supply system under AC 3kV three-phase system. By centrally arranging the three-phase contact rails, setting them on the same side, and providing side current supply, it reduces space occupation, increases maintenance space, realizes continuous arrangement of contact rails, and improves the following performance of the current collector shoe and contact rail, avoiding arcing and erosion.

[0005] To achieve the above objectives, this utility model provides a centralized three-phase contact rail power supply system under a 3kV three-phase AC system, comprising an insulating support frame providing overall support, a three-phase contact rail providing three-phase AC power, current collector shoes for transmitting electrical energy, and insulating blocks for insulating the three-phase electrical components.

[0006] The insulating support frame is centrally located on one side of the train and includes a first contact rail fastener, a second contact rail fastener, and a third contact rail fastener.

[0007] The three-phase contact rail includes a first contact rail, a second contact rail, and a third contact rail, all of which are C-type snap-fit ​​contact rails, and are respectively matched with the first contact rail buckle, the second contact rail buckle, and the third contact rail buckle and connected by a press snap;

[0008] The current collector shoe adopts a rolling design and contacts the three-phase contact rail;

[0009] The insulating block is filled between the three-phase contact rail and the insulating support frame to ensure electrical insulation.

[0010] Furthermore, the insulating support frame also includes a connecting plate at the bottom, on which bolt holes are provided.

[0011] Furthermore, the insulating support frame also includes a plurality of grooves for filling the insulating block.

[0012] Furthermore, the insulating support frame is made of fiberglass or insulating resin.

[0013] Furthermore, the three-phase contact rail is made of carbon fiber material.

[0014] Furthermore, the contact surface of the current collector shoe is made of a metal-impregnated carbon slider.

[0015] Furthermore, the insulating block is made of epoxy resin material.

[0016] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0017] 1. The AC 3kV three-phase centralized three-phase contact rail power supply system of this utility model adopts a three-phase AC side current supply method, and sets the contact rail on one side of the train track. This solves the problems of traditional upper and lower current supply contact rails requiring rail breakage at turnouts, which leads to the inability to supply power to the train continuously and the presence of phase loss in some sections. It reduces rail breakage caused by vehicle clearance encroachment, enables continuous arrangement of contact rails, reduces the length of rail breakage, and ensures continuous power supply.

[0018] 2. The centralized three-phase contact rail power supply system under the AC 3kV three-phase system of this utility model arranges the three-phase contact rails on the same side of the train through insulating brackets. This solves the problem that existing three-phase AC power supply systems use overhead contact network, contact rail, and running rail to form a three-phase system, or use contact rail, dedicated return rail, and running rail to form a three-phase system, which occupy the space under and on the top of the vehicle. The three-phase contact rail of this system not only meets the 3kV three-phase AC power supply requirements of the train, but also reduces the space occupied for equipment installation in the section by optimizing the spatial layout of the section, and increases the space for maintenance in the track area.

[0019] 3. The AC 3kV three-phase centralized three-phase contact rail power supply system of this utility model arranges the three-phase contact rails on the same side of the train through insulating brackets. This solves the problem that during train operation, there is self-swaying, poor shoe-rail / pantograph relationship between different phases of the current collector / pantograph and the contact rail / overhead contact network, which easily leads to arcing and ablation. This system utilizes the synchronous swaying characteristics of the vehicle on the same side to improve the following performance of the current collector and the contact rail and avoid arcing and ablation.

[0020] 4. The current collector shoe of the AC 3kV three-phase centralized three-phase contact rail power supply system of this utility model adopts a rolling design with rotating rollers at both ends to avoid impacting the contact rail. The contact surface is made of metal-coated carbon slider to reduce friction between the current collector shoe and the contact rail and extend service life. At the same time, the metal-coated carbon slider contact surface ensures efficient power transmission.

[0021] 5. The AC 3kV three-phase centralized three-phase contact rail power supply system of this utility model adopts a three-phase insulating bracket to solve the problem of fixing the three-phase contact rail. At the same time, insulating blocks are filled between the three-phase insulating bracket and the three-phase contact rail to ensure electrical insulation between the three-phase contact rail and prevent phase-to-phase short circuits.

[0022] 6. The centralized three-phase contact rail power supply system under the AC 3kV three-phase system of this utility model adopts a C-type snap-fit ​​design for the three-phase contact rail, which is pressed and snapped onto the insulating support frame, making it convenient for installation, disassembly, and maintenance, and reducing maintenance costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a centralized three-phase contact rail power supply system under AC 3kV three-phase system according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of an insulating support frame for a centralized three-phase contact rail power supply system under AC 3kV three-phase system, according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the current collector shoe of a centralized three-phase contact rail power supply system under AC 3kV three-phase system according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the installation of a centralized three-phase contact rail power supply system under a 3kV three-phase AC system, according to an embodiment of this utility model.

[0027] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-insulating support frame, 11-first contact rail fastener, 12-second contact rail fastener, 13-third contact rail fastener, 14-connecting plate, 15-groove, 2-three-phase contact rail, 21-first contact rail, 22-second contact rail, 23-third contact rail, 3-current collector shoe, 4-insulating block, 5-train. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0033] like Figure 1 As shown, this utility model embodiment provides a centralized three-phase contact rail power supply system under AC 3kV three-phase system, including an insulating support frame 1, a three-phase contact rail 2, a current collector shoe 3, and an insulating block 4;

[0034] The insulating support frame 1 is bolted to one side of the train 5. The three-phase contact rail 2 is pressed onto the insulating support frame 1 using a C-shaped snap-fit ​​design. Simultaneously, the insulating block 4 fills the space between the three-phase contact rail 2 and the insulating support frame 1, ensuring insulation between the three phases. The current collector shoe 3 contacts the three-phase contact rail 2 using a rolling design, efficiently transmitting electrical energy through a carbon-impregnated sliding block contact surface. This embodiment of the system solves the problems of large space occupation, poor current collection tracking, and risk of power loss due to rail breakage in traditional three-phase power supply systems by centrally arranging the contact rails, setting them on the same side, side current supply, and overall insulation design, thus achieving efficient, stable, and safe power transmission for rail transit trains.

[0035] Specifically, such as Figure 2 As shown, the insulating support frame 1 provides overall support and includes a first contact rail fastener 11, a second contact rail fastener 12, a third contact rail fastener 13, and a connecting plate 14, all of which are elongated strips. Multiple grooves 15 are formed between them to fill the insulating blocks 4. The connecting plate is located at the bottom and has bolt holes for fixing the insulating support frame 1 to the track base with bolts. The three contact rail fasteners are used to engage the three-phase contact rails 2. The insulating support frame 1 is entirely insulated and made of materials with good insulation performance and mechanical strength, such as fiberglass or insulating resin. The insulating support frame 1 is centrally located on one side of the train and is fastened to the track base with bolts.

[0036] The three-phase contact rail 2 includes a first contact rail 21, a second contact rail 22, and a third contact rail 23, all of which are C-type snap-fit ​​contact rails. They are matched with the first contact rail buckle 11, the second contact rail buckle 12, and the third contact rail buckle 13, respectively. They are snapped onto the contact rail buckle by pressing, and each contact rail is provided with an insulating pad underneath. Each contact rail is pressed and fixed by the insulating block 4. The three-phase contact rail 2 provides three-phase AC power to the train. It is made of carbon fiber material and has high strength, lightweight and good conductivity.

[0037] like Figure 3 As shown, the current collector shoe 3 adopts a rolling design with rotating rollers at both ends to avoid impacting the contact rail. Its contact surface uses a metal-coated carbon slider to ensure good conductivity and wear resistance. It transmits electrical energy to the train's electrical system through contact with the three-phase contact rail 2.

[0038] The insulating block 4 is filled between the groove 15 of the three-phase contact rail 2 and the insulating support frame 1 to ensure electrical insulation between the three-phase contact rails and prevent phase-to-phase short circuits. The insulating block 4 is made of epoxy resin material.

[0039] During installation, on one side of the train, the insulating support frame 1 is fixed to the rail base using bolts through the bolt holes on the connecting plate 14. Insulating pads are placed on each contact rail base of the insulating support 1. The first contact rail 21, second contact rail 22, and third contact rail 23 of the three-phase contact rails 2 are respectively snapped onto the corresponding first contact rail fasteners 11, second contact rail fasteners 12, and third contact rail fasteners 13. Pressing the fasteners ensures a secure connection. Insulating blocks 4 are filled into the grooves 15 of the insulating support frame 1, ensuring they fit tightly between the three-phase contact rails 2 and the insulating support frame 1 to provide electrical insulation. The current collector shoe 3 is installed on the train, ensuring its rotating rollers can roll smoothly and contact the three-phase contact rails 2. Figure 4 This is a schematic diagram of the installation of a centralized three-phase contact rail power supply system under a 3kV three-phase AC system, according to an embodiment of this utility model.

[0040] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centralized three-phase conductor rail power supply system under AC 3kV three-phase system, characterized in that, The utility model relates to an electric train contact rail system, which comprises an insulating support frame (1) for overall support, three-phase contact rails (2) for providing three-phase alternating current power supply, current collecting shoes (3) for transmitting electric energy, and insulating blocks (4) for insulating the three-phase electricity, wherein, The insulating support frame (1) is centrally arranged on one side of the train and comprises a first contact rail holder (11), a second contact rail holder (12), and a third contact rail holder (13); The three-phase contact rails (2) comprise a first contact rail (21), a second contact rail (22), and a third contact rail (23), all of which are C-shaped buckle contact rails and are matched with the first contact rail holder (11), the second contact rail holder (12), and the third contact rail holder (13) respectively and connected through pressing buckles; The current collecting shoes (3) are designed in a rolling manner and are in contact with the three-phase contact rails (2); The insulating blocks (4) are filled between the three-phase contact rails (2) and the insulating support frame (1) to ensure electrical insulation.

2. The centralized three-phase conductor rail power supply system of AC 3kV three-phase system according to claim 1, characterized in that, The insulating support frame (1) further comprises a connecting plate (14) arranged at the bottom, which is provided with bolt holes.

3. The centralized three-phase conductor rail power supply system of AC 3kV three-phase system according to claim 2, characterized in that, The insulating support frame (1) further comprises a plurality of grooves (15) for filling the insulating blocks (4).

4. The centralized three-phase conductor rail power supply system of AC 3kV three-phase system according to claim 3, characterized in that, The insulating support frame (1) is made of glass fiber reinforced plastic or insulating resin.

5. A centralized three-phase conductor rail power supply system of AC 3 kV three-phase system according to any one of claims 1-4, characterized in that, The three-phase contact rails (2) are made of carbon fiber material.

6. A centralized three-phase conductor rail power supply system of AC 3 kV three-phase system according to any one of claims 1-4, characterized in that, The contact surface of the current collecting shoes (3) is made of metal impregnated carbon sliding block.

7. A centralized three-phase conductor rail power supply system of AC 3 kV three-phase system according to any one of claims 1-4, characterized in that, The insulating blocks (4) are made of epoxy resin material.

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