A power supply device for a railway locomotive

Abstract

The application aims to provide a railway locomotive power supply device, which comprises a power supply unit installed on a track, the height dimension of the power supply unit is higher than the center line of the track by a fixed dimension a after installation, a<=d, d is the bottom clearance of the locomotive; a power supply cable connected with the power supply unit to supply power to the power supply unit; a current collector installed on the railway locomotive and matched with the power supply unit; and a lifting device connected with the current collector to control the lifting of the current collector; after the above technical scheme is adopted, the application can meet the demand of the rapid charging of the railway locomotive ground power supply, and can reduce the stray current and facilitate the on-site construction.

Description

Technical Field

[0001] This invention relates to the field of locomotive power supply technology, and in particular to a railway locomotive power supply device. Background Technology

[0002] Railway locomotives are typically driven into depots using exposed ground electrodes. Power is supplied by these electrodes and then transmitted through an additional onboard inverter power supply installed on the locomotive, enabling depot entry without an electrical grid. This method is cumbersome, inflexible, dangerous, and inconvenient to operate. The depot contains a large amount of oil mist from engine oil or lubricating oil, which can generate numerous sparks upon contact with surfaces, posing a significant fire hazard. Currently, most locomotive depots use an inverter power supply that draws power from the locomotive's battery, but this method is costly, requires extensive track modifications, and causes considerable wear and tear on the batteries.

[0003] With the development of technology, some rail transit contactless power supply devices and methods have been adopted. However, their controllers are located in the power supply station and are directly connected to the signal receivers of the frequency converter, switching tubes, and pickup coils. This results in numerous signal cables, complex wiring, and a high failure rate in practical applications. To address these shortcomings, Chinese patent application number CN202122526137.9 discloses a contactless power supply for railway locomotives, including a ground power supply system, a wireless receiving system, an inverter system, a control system, and a manual operation panel. This contactless power supply for railway locomotives uses underground power cables laid to a depth of 20mm, with the cable distance from the edge of the rail greater than 15cm. Compared to exposed electrodes and battery inverter power supplies, this product improves overall safety performance, reduces locomotive battery wear, and is simple to operate. It is a highly efficient intelligent product that avoids drawing power from the locomotive's onboard battery box, reducing battery wear and workload. This solves the problems of numerous signal cables, complex wiring, and high failure rates in current rail transit contactless power supply devices and methods.

[0004] When using this application, the wireless receiver is fixed to the driver's foot pedal using a mounting bracket. The distance is adjusted so that the lowest point of the wireless receiver board is less than 20mm from the ground. The cable output from the inverter system is connected to the locomotive's own depot socket, ensuring good contact. The driver operates the handheld control panel and presses the "Power On" button to power on the system. Afterward, the driver operates the traction vehicle to enter the depot. After entering the depot, the power is turned off, the wireless receiver is removed and stored in a designated location, and the power cabinet power is turned off. The above application is only used for vehicle entry into the depot and cannot realize segmented continuous power supply for railway locomotives or ground power supply for trams.

[0005] In summary, a new technical solution is needed to address the aforementioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a railway locomotive power supply device, comprising:

[0007] Multiple power supply units, each installed on the track, with the height of the power supply unit being a fixed dimension a above the centerline of the track after installation, where a ≤ d, and d is the locomotive bottom clearance;

[0008] The power supply cable connects to the power supply unit and supplies power to the power supply unit.

[0009] A current collecting device is installed on a railway locomotive and works in conjunction with a power supply unit; the current collecting device includes a conductor bar, on both sides of which are provided with resistive contacts, and a diode D1 and a detection resistor R0 are connected between the resistive contacts and the conductor bar;

[0010] A lifting device, connected to a current receiving device, is used to control the lifting and lowering of the current receiving device.

[0011] As a preferred embodiment, the power supply unit includes a 24V circuit, which includes a 24V power supply. The 24V power supply is connected to the power input terminal and the resistor contact. Resistors R1 and R3 are provided between the 24V power supply and the resistor contact. A detection circuit is provided between resistors R1 and R3. The detection circuit is connected to the power supply trigger circuit, which is connected to the power supply device. The output terminal of the power supply device is connected to the current receiving device, and the input terminal of the power supply device is connected to the power input terminal.

[0012] As a preferred embodiment, the conductor bar includes a positive electrode and a negative electrode, and the resistive contact includes an A1 terminal and an A2 terminal, wherein a diode D1 is provided between the A1 terminal and the positive electrode or between the A2 terminal and the positive electrode; and a detection resistor R0 is provided between the A1 terminal and the negative electrode or between the A2 terminal and the negative electrode.

[0013] The negative electrode of the conductor bar includes a B1 terminal and a B2 terminal. A detection resistor R0 is provided between the A1 terminal and the B1 terminal, or between the A1 terminal and the B2 terminal, or between the A2 terminal and the B1 terminal, or between the A2 terminal and the B2 terminal.

[0014] As a preferred embodiment, a power input switch SPS is provided between the power input terminal and the power supply device, and the power input switch SPS is connected to the output voltage detection circuit.

[0015] As a preferred embodiment, in the landing state, the distance b between the current receiving surface of the current receiving device and the center line of the track plane is greater than a; in the shoe-loaded state, the minimum distance c between the current receiving surface of the current receiving device and the track plane is greater than the locomotive bottom clearance dimension d.

[0016] As a preferred option, the power supply unit can be installed continuously or at selected locations.

[0017] As a preferred embodiment, the power source of the lifting device can be any one of wind control, electric control, or hydraulic control.

[0018] As a preferred embodiment, each of the power supply units is enclosed within a negative conductor.

[0019] As a preferred embodiment, the power supply unit is installed at the centerline of the track, and the lower part of the power supply unit is supported by sleepers and stones.

[0020] As a preferred option, fixed devices are installed on the left and right sides of the power supply unit.

[0021] As a preferred option, the fixing device is made of stones or cement.

[0022] By adopting the above technical solution, this application has the following advantages:

[0023] 1. To meet the needs of rapid charging of railway locomotives via ground power supply;

[0024] 2. The locomotive is charged during operation, with multiple power supply units automatically supplying power and ensuring safe grounding based on the location of the current collector;

[0025] 3. Reduces stray current and facilitates on-site construction. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the power supply device of this application;

[0028] Figure 2 This is the circuit schematic diagram of this application;

[0029] Figure 3 This is a schematic diagram of the current receiving device of this application;

[0030] Figure 4 This is a schematic diagram of the current receiving device at angle two of this application;

[0031] Figure 5 This is a structural schematic diagram of Embodiment 2 of this application;

[0032] 1. Power supply unit; 2. Railway locomotive; 3. Track; 4. Electronic switch; 5. Sleeper; 6. Negative conductor; 7. 24V power supply; 8. Power input terminal; 9. Resistor contact; 10. Detection circuit; 11. Power supply trigger circuit; 12. Power supply device; 13. Current collection device; 14. Conductor bar; 15. Power input switch SPS; 16. Output voltage detection circuit; 17. Power supply unit one; 18. Power supply unit two. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to specific examples and the accompanying drawings.

[0034] like Figure 1 As shown, this embodiment provides a railway locomotive power supply device, including:

[0035] Multiple power supply units 1 are used to supply power to the railway locomotive 2 and are installed on the track 3. The height of the power supply unit 1 after installation is higher than the centerline of the track 3 by a fixed dimension 'a', where 'a' ≤ 'd', and 'd' is the bottom clearance of the railway locomotive 2. In this embodiment, the power supply unit 1 uses an electronic switch 4 to realize power supply and safety control. Specifically, the electronic switch 4 is set between the positive and negative busbars of the power supply unit 1. Preferably, the power supply unit 1 is installed at the centerline of the track 3. The lower part of the power supply unit 1 is supported by sleepers 5 and stones, which also serve as drainage. More preferably, in order to improve stability, fixing devices are set on the left and right sides of the power supply unit 1. The fixing devices are made of stones or cement. Power supply units 1 are not installed in low-lying areas to prevent rainwater immersion. The negative conductor 6 surrounds the power supply unit 1 to reduce stray current and facilitate construction. The negative conductor 6 is set on the outside of each of the above power supply units 1.

[0036] like Figure 2 As shown, the power supply unit 1 includes a 24V circuit, which includes a 24V power supply 7. The 24V power supply 7 is connected to a power input terminal 8 and a resistor contact 9. The power input terminal 8 receives 750VDC, which is converted to 24V power through a transformer, etc. A diode D2, a resistor R1, and a resistor R3 are provided between the 24V power supply and the resistor contact 9. A detection circuit 10 is provided between the resistors R1 and R3. The detection circuit 10 is connected to a power supply trigger circuit 11, which is connected to a power supply device 12. The output terminal of the power supply device 12 is connected to a current receiving device 13, and the input terminal of the power supply device 12 is connected to the power input terminal 8. The power input terminal 8 outputs 750V voltage through the output terminal of the power supply device 12, which supplies power to the railway locomotive 2 through the current receiving device 13.

[0037] The aforementioned conductor 14 includes a positive electrode and a negative electrode. The negative electrode includes terminals B1 and B2. The resistor contact 9 includes terminals A1 and A2. A diode D1 is provided between terminal A1 and the positive electrode, or a diode D1 is provided between terminal A2 and the positive electrode. A detection resistor R0 is provided between terminal A1 and the negative electrode, or a detection resistor R0 is provided between terminal A2 and the negative electrode. More specifically, a detection resistor R0 is provided between terminal A1 and terminal B1, or between terminal A1 and terminal B2, or between terminal A2 and terminal B1, or between terminal A2 and terminal B2. The circuit principle in this application triggers power supply when a designated vehicle enters using a voltage and resistance method.

[0038] As a preferred embodiment, a power input switch SPS15 is provided between the power input terminal 8 and the power supply device 12; in the state where no vehicle enters (judging the voltage V at point A). F If no output current is detected, but the power supply device 12 still has an output, the output voltage detection circuit 16 controls the power input switch SPS15 to disconnect to ensure safety.

[0039] A power supply cable is connected to power supply unit 1 to supply power to power supply unit 1; the power supply cable can be laid under the sleepers.

[0040] The current collecting device 13, installed on the railway locomotive 2, works in conjunction with the power supply unit 1 to provide rapid power to the railway locomotive 2. The current collecting device 13 is installed on the front and rear bogies of the railway locomotive 2 or on the longitudinal centerline of other locomotives. The current collecting device 13 includes a guide bar 14, with resistance contacts 9 of the current collecting shoe on both sides of the guide bar 14. A diode D1 is installed between the resistance contacts 9 and the guide bar 14, and a detection resistor R0 is also installed. The detection resistor R0, in conjunction with a 24V circuit, forms a detection circuit used to determine whether the vehicle has arrived. In the landing state, the distance b between the current collecting surface of the current collecting device 13 and the centerline of the track plane is greater than a. In the boot-like state, the minimum distance c between the current-collecting surface of the current-collecting device 13 and the upper plane of the track is greater than the locomotive bottom clearance dimension d; preferably, the distance L between B1 and A1 and the distance L between B2 and A2 can be 200mm; that is, after the resistive contact 9 enters the power supply unit 200mm, the conductor (or current-collecting brush) reaches the surface of the power supply unit. More specifically, after A1 enters the power supply unit 200mm, B1 reaches the surface of the power supply unit 1; or after A2 enters the power supply unit 200mm, B2 reaches the surface of the power supply unit 1; the time T for the resistive contact 9 to arrive in advance is T = L / V, where V is the speed of the railway locomotive.

[0041] A lifting device is connected to the flow receiving device 13 and is used to control the lifting of the flow receiving device 13. The power source of the lifting device 13 is any one of wind control, electric control, oil control, and pneumatic control, preferably pneumatic control.

[0042] Example 2:

[0043] like Figure 3 As shown, in order to more clearly demonstrate the working principle of the present invention, this embodiment takes two power supply units as an example, including power supply unit one 17 and power supply unit two 18. However, in actual operation, there are more than two units. The specific arrangement is based on the length of the track, which will not be described in detail here.

[0044] Taking two power supply units as an example, the power supply method is explained (in this embodiment, the direction of travel of railway locomotive 2 is from power supply unit 17 to power supply unit 28). The power supply methods mainly include the following two:

[0045] A method for triggering power supply by introducing voltage:

[0046] When power supply unit 17 outputs power, the current receiving device 13 will lead the voltage output by power supply unit 17 to power supply unit 2 18, and the power supply trigger circuit 11 of power supply unit 2 18 will be triggered to output, thereby realizing power supply and ensuring continuous power supply.

[0047] The specific principle is as follows: When power supply unit 17 is energized, voltage is introduced through point B1 (or B2) (when the forward and backward running directions are different), through diode D1 of vehicle current receiving device 13, and then through contact finger A1 (or A2) to the power supply unit, forming a loop with the 24V circuit. The voltage at point A is V through resistor R3. F =V1;

[0048] Another method is to trigger the power supply using the resistance detection method:

[0049] When power supply unit 17 has no power output, power supply unit 218 detects the detection resistor R0 parameter of current receiving device 13 and triggers power supply unit 218 to supply power.

[0050] The specific principle is as follows: When power supply unit 17 is de-energized: contact finger A1 (or A2) introduces the detection resistor R0 into the 24V circuit of power supply unit 1. After voltage division by resistors R1 and R2 and the detection resistor R0, the voltage at point A is V. F =V2;

[0051] The detection circuit 10 in power supply unit 2 18 is connected to the voltage V at point A. F =V1 or V F When V2 is reached, the energized state of the vehicle is determined, and the power supply output is triggered and grounded.

[0052] By adopting the above technical solution, this application has the following advantages:

[0053] 1. To meet the needs of rapid charging of railway locomotives via ground power supply;

[0054] 2. The locomotive is charged during operation, with multiple power supply units automatically supplying power and ensuring safe grounding based on the location of the current collector;

[0055] 3. Reduces stray current and facilitates on-site construction.

[0056] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of the different aspects of the invention as described above exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A railway locomotive power supply device, characterized in that, include: Multiple power supply units (1), each power supply unit (1) is installed on the track (3), and the height dimension of the power supply unit (1) is higher than the center line of the track (3) by a fixed dimension a after installation, a≤d, where d is the bottom clearance of the locomotive; A power supply cable is connected to the power supply unit (1) to supply power to the power supply unit (1); The current receiving device (13) is installed on the railway locomotive (2) and cooperates with the power supply unit (1); the current receiving device (13) includes a guide bar (14), and resistance fingers (9) are provided on both sides of the guide bar (14). A diode D1 and a detection resistor R0 are provided between the resistance fingers (9) and the guide bar (14); A lifting device is connected to the current receiving device (13) and is used to control the lifting of the current receiving device (13); The conductor (14) includes a positive electrode and a negative electrode, and the resistor contact (9) includes an A1 end and an A2 end. A diode D1 is provided between the A1 end and the positive electrode or between the A2 end and the positive electrode, and a detection resistor R0 is provided between the A1 end and the negative electrode or between the A2 end and the negative electrode. The power supply unit (1) includes a 24V circuit, which includes a 24V power supply (7). The 24V power supply (7) is connected to the power input terminal (8) and the resistor contact (9) respectively. A diode D2, a resistor R1, and a resistor R3 are provided between the 24V power supply (7) and the resistor contact (9). A detection circuit (10) is provided between the resistor R1 and the resistor R3. The detection circuit (10) is connected to the power supply trigger circuit (11). The power supply trigger circuit (11) is connected to the power supply device (12). The output terminal of the power supply device (12) is connected to the current receiving device (13). The input terminal of the power supply device (12) is connected to the power input terminal (8).

2. The railway locomotive power supply device according to claim 1, characterized in that, In the landing state, the distance b between the receiving surface of the receiving device (13) and the center line of the upper plane of the track (3) is greater than a. In the shoe-receiving state, the minimum distance c between the receiving surface of the receiving device (13) and the upper plane of the track (3) is greater than the locomotive bottom clearance dimension d.

3. A railway locomotive power supply device according to claim 1, characterized in that, The power supply unit (1) is installed either continuously or at a selected location.

4. A railway locomotive power supply device according to claim 1, characterized in that, Each of the power supply units (1) is enclosed within the negative conductor (6).

5. A railway locomotive power supply device according to claim 1, characterized in that, The power supply unit (1) is installed at the center line of the track (3), and the lower part of the power supply unit (1) is supported by sleepers (5) and stones.

6. A railway locomotive power supply device according to claim 1, characterized in that, Fixed equipment is installed on the left and right sides of the power supply unit (1).

7. A railway locomotive power supply device according to claim 6, characterized in that, The fixing device is made of stones or cement.

8. A railway locomotive power supply device according to claim 1, characterized in that, The power supply cable is laid under the sleeper (5).

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