Railway traction power supply device with lightning protection structure

Abstract

The utility model discloses a railway traction power supply device with a lightning protection structure, which comprises a power supply main body, the power supply main body is provided with a side-penetrating metal box, a plurality of curved terminals are arranged in the side-penetrating metal box, and the railway traction power supply device further comprises a plurality of insulating pillars and an integrated lightning protection cover. The plurality of insulating pillars are fixedly erected at the top end of the power supply main body; an integrated lightning protection cover is connected with and supported by the insulation supporting columns, the upper end of the power supply body is completely covered with the integrated lightning protection cover, the lightning protection cover is provided with a cover body, the top end of the cover body is provided with polygonal pyramid-shaped lightning arresting needles distributed in an array mode, multiple layers of metal conductive nets are arranged in the cover body, and the metal conductive nets are connected through flexible conductive bands. Wherein one metal conductive net is connected with a composite grounding device arranged at the bottom of the power supply main body, and the metal conductive net on the uppermost layer is also electrically connected with each polygonal pyramid-shaped lightning arresting needle. According to the utility model, the direct impact of thunder and lightning on the power supply main body is effectively reduced, and the direct lightning resistance of the power supply device is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of railway traction power supply technology, specifically to a railway traction power supply device with a lightning protection structure. Background Technology

[0002] Railway traction power supply systems are a crucial component of the railway transportation system, and their stable operation is essential for the safe and efficient operation of the railway. However, in actual operation, railway traction power supply systems are frequently affected by lightning strikes. Lightning strikes can damage electrical equipment within the power supply system, affecting the normal power supply to the railway and even causing safety accidents.

[0003] Currently, although some railway traction power supply devices have certain lightning protection measures, these measures often suffer from problems such as poor lightning protection effectiveness, complex structure, and difficult maintenance. Therefore, it is necessary to design a railway traction power supply device with a better lightning protection structure. Utility Model Content

[0004] The purpose of this utility model is to provide a railway traction power supply device with a lightning protection structure to solve the problems of poor lightning protection effect, complex structure and difficult maintenance of existing railway traction power supply devices.

[0005] To solve the above-mentioned technical problems, this utility model achieves the following solution: A railway traction power supply device with a lightning protection structure, comprising a power supply body having a side-transparent metal box containing multiple curved terminals, and further comprising:

[0006] Multiple insulating supports are fixed to the top of the power supply unit;

[0007] An integrated lightning protection cover connects to and is supported by each insulating support column, completely covering the upper part of the power supply body. The lightning protection cover has a main body, and the top of the main body is provided with arrayed multi-faceted lightning rods. The cover has multiple layers of metal conductive mesh inside, and each layer of metal conductive mesh is connected by a flexible conductive strip. One of the metal conductive meshes is connected to a composite grounding device set at the bottom of the power supply body. The uppermost metal conductive mesh also establishes an electrical connection structure with each multi-faceted lightning rod.

[0008] Furthermore, the power supply unit has a drawer-type structure.

[0009] Furthermore, the drawer-type structure includes a pull-out box consisting of a drawer lid and a drawer compartment, the drawer compartment being equipped with casters.

[0010] Furthermore, the drawer-type structure is provided with a limiting structure, which includes:

[0011] Two fixed-length chains, one of which is fixed to the outer end of the side-panel metal box, and the other is fixed to the outer end of the drawer lid.

[0012] A spring is connected between the two fixed-length chains.

[0013] Furthermore, the drawer box is provided with a terminal group that is connected to multiple curved terminals one-to-one, and the terminal group is electrically connected to the control key on the drawer cover via a circuit.

[0014] Furthermore, the composite grounding device consists of a vertical grounding electrode and a horizontal grounding electrode, wherein the horizontal grounding electrode is arranged in a ring around the vertical grounding electrode and the horizontal grounding electrode and the vertical grounding electrode are separated by a ring-shaped insulating sleeve.

[0015] Furthermore, the vertical grounding electrode is a graphene-modified copper grounding electrode.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model of railway traction power supply device includes an integrated lightning protection cover, which integrates lightning interception, current shunting, and shielding functions. Its top is equipped with regularly arrayed multi-faceted pyramidal lightning rods. Compared to traditional needle-shaped lightning rods, the multi-faceted pyramidal design greatly increases the lightning interception surface area, significantly improving the efficiency of lightning capture and enabling comprehensive and efficient response to lightning strikes from different angles. The integrated lightning protection cover's multi-faceted pyramidal lightning rods and multi-layered metal conductive mesh design significantly improve lightning interception and current shunting capabilities, effectively reducing the direct impact of lightning on the power supply unit and significantly enhancing the power supply device's ability to withstand direct lightning strikes.

[0018] 2. The surge protector of this invention has multiple layers of conductive metal mesh inside, with each layer electrically connected by a flexible conductive strip. The flexible conductive strip not only buffers the instantaneous impact of lightning current to a certain extent, reducing the impact on the surge protector structure, but also adapts to the minor deformations that may occur under different environmental conditions, ensuring the electrical connection stability of the conductive mesh system. The conductive metal mesh is tightly connected to a composite grounding device located at the bottom of the power supply unit, providing a low-impedance discharge path for the lightning current.

[0019] 3. The composite grounding device of this utility model consists of a vertical grounding electrode and a horizontal grounding electrode. The vertical grounding electrode is a graphene-modified copper grounding electrode, which utilizes the excellent conductivity of graphene and the good corrosion resistance of copper to effectively reduce the grounding resistance and enhance the long-term stability of the grounding electrode. The horizontal grounding electrode adopts a ring layout, surrounding the vertical grounding electrode, so that the grounding current distribution is more uniform and significantly enhances the stability and reliability of the grounding. Attached Figure Description

[0020] Figure 1 This is a pre-assembly structural diagram of the railway traction power supply device of this utility model.

[0021] Figure 2 This is a schematic diagram of the integrated lightning protection cover structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the main power supply structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the composite grounding device of this utility model.

[0024] The following components are marked in the attached diagram: 1. Power supply main body; 2. Push-pull box; 3. Limiting structure; 4. Threaded hole; 5. Insulating support; 6. Lightning protection cover; 7. Composite grounding device; 22. Roller; 23. Curved terminal; 24. Terminal group; 31. Spring; 32. Fixed length chain; 61. Cover body; 62. Multi-faceted lightning arresting pin; 63. Metal conductive mesh; 64. Flexible conductive strip; 71. Vertical grounding electrode; 72. Horizontal grounding electrode; 73. Ring insulating sleeve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the embodiments described in this utility model are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] Example 1: The specific structure of this utility model is as follows:

[0028] Please refer to the appendix. Figure 1-4 The present invention provides a railway traction power supply device with a lightning protection structure, including a power supply body 1, which has a side-transparent metal box and multiple curved terminals 23 inside. The railway traction power supply device also includes multiple insulating supports 5 and an integrated lightning protection cover 6.

[0029] Multiple insulating supports 5 are fixed to the top of the power supply body 1. There are four insulating supports 5. The top four corners of the side-transparent metal box are provided with four threaded holes 4. The lower ends of the four insulating supports 5 are screwed into the corresponding four threaded holes 4.

[0030] An integrated lightning protection cover 6 connects to and is supported by each insulating support column 5, completely covering the upper part of the power supply body 1. The lightning protection cover 6 has a cover body 61, and the top of the cover body 61 is provided with arrayed multi-faceted pyramidal lightning arresting needles 62. Inside, there are multiple layers of metal conductive mesh 63, with all four sides of the metal conductive mesh 63 fixed by profiles. Each layer of metal conductive mesh 63 is connected by a flexible conductive strip 64. One of the metal conductive meshes 63 is connected to a composite grounding device 7 located at the bottom of the power supply body 1. The uppermost metal conductive mesh 63 also establishes an electrical connection structure with each of the multi-faceted pyramidal lightning arresting needles 62. This utility model of a railway traction power supply device includes an integrated lightning protection cover, which integrates lightning interception, current diversion, and shielding functions. Its top is provided with regularly arrayed multi-faceted pyramidal lightning arresting needles. Compared to traditional needle-shaped lightning arresters, the multi-faceted pyramidal design greatly increases the lightning interception surface area, significantly improving the efficiency of lightning capture and enabling all-round and efficient response to lightning strikes from different angles. The surge protector of this invention features a multi-layered metal conductive mesh inside, with each layer electrically connected by a flexible conductive strip. This flexible conductive strip not only buffers the instantaneous impact of lightning current to a certain extent, reducing the impact on the surge protector structure, but also adapts to minor deformations that may occur under different environmental conditions, ensuring the electrical connection stability of the conductive mesh system. The metal conductive mesh is tightly connected to a composite grounding device located at the bottom of the power supply unit, providing a low-impedance discharge path for the lightning current.

[0031] The integrated surge protector 6 is precisely installed above the power supply unit 1 using the insulating support 5, ensuring that the surge protector 6 and the power supply unit 1 maintain a suitable distance, which can effectively play the role of surge protection without affecting the normal operation of the power supply unit 1.

[0032] The composite grounding device 7 consists of a vertical grounding electrode 71 and a horizontal grounding electrode 72. The horizontal grounding electrode 72 is arranged in a ring around the vertical grounding electrode 71, and the horizontal grounding electrode 72 and the vertical grounding electrode 71 are separated by a ring-shaped insulating sleeve 73. The vertical grounding electrode 71 is a graphene-modified copper grounding electrode. The composite grounding device of this invention consists of a vertical grounding electrode and a horizontal grounding electrode. The vertical grounding electrode uses a graphene-modified copper grounding electrode, utilizing the excellent conductivity of graphene and the good corrosion resistance of copper to effectively reduce grounding resistance and enhance the long-term stability of the grounding electrode. The horizontal grounding electrode adopts a ring layout, surrounding the vertical grounding electrode, making the grounding current distribution more uniform and significantly enhancing the stability and reliability of the grounding. It significantly reduces and stabilizes the grounding resistance, ensuring that lightning current can be quickly and reliably conducted into the ground, thus improving the reliability and stability of the grounding system.

[0033] Installation of the composite grounding device 7: The composite grounding device 7 shall be installed strictly in accordance with the design requirements. The vertical grounding electrode 71 shall be driven vertically into the ground to ensure full contact with the soil and to guarantee a good grounding effect. At the same time, the horizontal grounding electrode 72 shall be laid in a ring around the vertical grounding electrode 71 to ensure that the connection between each grounding electrode is firm and to form a complete grounding network.

[0034] The power supply unit 1 has a drawer-type structure. The drawer-type structure includes a pull-out box 2 composed of a drawer lid and a drawer compartment, the drawer compartment being equipped with rollers 22. The drawer-type structure is provided with a limiting structure 3, which includes:

[0035] Two fixed-length chains 32, one of which is fixed at its outer end to the side-panel metal box, and the other is fixed at its outer end to the inner surface of the drawer lid.

[0036] A spring 31 is connected between the two fixed-length chains 32.

[0037] The drawer compartment is equipped with terminal groups 24 that are connected one-to-one with multiple curved terminals 23. The terminal groups 24 are electrically connected to the control key on the drawer lid via wiring. The drawer lid is equipped with a locking structure, which is secured by a padlock after the drawer lid is closed tightly over the side-panel metal box.

[0038] The contact structure between the curved terminal 23 and the terminal group 24 is elastic contact, that is, the curved terminal 23 is configured as an elastic electrode or the terminal group 24 is configured as an elastic electrode or both the curved terminal 23 and the terminal group 24 are configured as elastic electrodes. Example 2:

[0039] The working principle of this utility model is as follows: When lightning occurs, the multi-faceted lightning rod on the top of the integrated lightning protection cover first captures the lightning. The lightning current is quickly transmitted to the composite grounding device through a multi-layer metal conductive mesh and a flexible conductive strip, and finally safely guided into the ground, effectively protecting the main power supply body from damage caused by direct lightning strikes.

[0040] In addition, this invention accurately connects an intelligent lightning protection circuit to the power supply line inside the power supply unit. Voltage sensors are correctly installed at each key node to ensure real-time and accurate monitoring of voltage changes in the power supply line.

[0041] The power supply unit 1 of this utility model is also equipped with a voltage sensor, a microprocessor, and a thyristor surge protector. The voltage sensor monitors the voltage of the power supply line in real time. Once an overvoltage is detected, the microprocessor immediately makes a judgment based on a preset threshold and quickly controls the thyristor surge protector to operate, limiting the overvoltage to a safe range, ensuring the stable operation of the power supply device, and effectively preventing damage to electrical equipment due to induced overvoltage.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A railway traction power supply device having a lightning protection structure, comprising a power supply main body (1) having a side-through metal box, the inside of which is provided with a plurality of curved terminals (23), characterized in that, The railway traction power supply device further comprises: a plurality of insulated support posts (5) fixed to the top end of the power supply body (1); an integrated lightning protection cover (6) connected to and supported by the insulated support posts (5), which covers the upper end of the power supply body (1), the lightning protection cover (6) having a cover body (61) with a plurality of pyramid-shaped lightning arresters (62) arranged in an array at the top end of the cover body (61), a plurality of metal conductive nets (63) arranged inside the cover body (61), each layer of the metal conductive nets (63) connected by a flexible conductive belt (64), one of the metal conductive nets (63) connected to a composite grounding device (7) arranged at the bottom of the power supply body (1), and the uppermost layer of the metal conductive nets (63) further connected to each of the pyramid-shaped lightning arresters (62).

2. The railway traction power supply device with lightning protection structure according to claim 1, characterized in that, The power supply body (1) has a drawer type structure.

3. The railway traction power supply device with lightning protection structure according to claim 2, characterized in that, The drawer type structure comprises a push-pull box (2) composed of a drawer cover and a drawer box, and the drawer box is provided with a plurality of rollers (22).

4. The railway traction power supply device with lightning protection structure according to claim 3, characterized in that, The drawer type structure is provided with a limiting structure (3) comprising: two fixed-length chains (32), one end of one of the fixed-length chains (32) fixed to the side of the metal box, and the other end of the other fixed-length chain (32) fixed to the inner surface of the drawer cover; a spring (31) connected between the two fixed-length chains (32).

5. The railway traction power supply device having a lightning protection structure according to claim 3, characterized by, The drawer box is provided with a terminal group (24) one-to-one connected to a plurality of curved terminals (23), and the terminal group (24) is electrically connected to the control keys on the drawer cover through a wire.

6. The railway traction power supply device having a lightning protection structure according to claim 1, characterized by, The composite grounding device (7) comprises a vertical grounding electrode (71) and a horizontal grounding electrode (72), the horizontal grounding electrode (72) arranged in a ring around the vertical grounding electrode (71), and the horizontal grounding electrode (72) and the vertical grounding electrode (71) separated by a ring-shaped insulating sleeve (73).

7. The railway traction power supply device with lightning protection structure according to claim 6, characterized in that, The vertical grounding electrode (71) is a graphene modified copper grounding electrode.

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