Electric locomotive and its safe end-changing device, control method, and storage medium

Abstract

The present invention discloses an electric locomotive and its safe end-changing device, control method, and storage medium. The end-changing device includes a first end-changing switch, a second end-changing switch, and a control unit. The first end-changing switch is located in a first driver's cab, and the second end-changing switch is located in a second driver's cab. The first end-changing switch and the second end-changing switch are both used to generate an end-changing instruction. The control unit is used to activate the end-changing process based on the first end-changing instruction generated by the first end-changing switch or the second end-changing switch, determine whether the first end-changing instruction is an erroneous operation instruction, and control the pantograph action based on the judgment result to avoid double pantograph current collection during erroneous operation. The present invention effectively avoids problems such as contact network short circuits, substation tripping, and damage to the locomotive's own high-voltage box caused by driver erroneous operation, thereby improving the safety of railway lines and locomotive vehicles.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit electric locomotives, and in particular relates to an electric locomotive and a safe end-changing device, a control method, and a storage medium thereof. Background Art

[0002] Currently, most electric locomotives have an automatic end-switching function. When the driver operates the end-switching switch (hardware switch or display soft switch), the automatic end-switching process is activated, and the locomotive automatically raises the front bow at its end, maintaining the double bow current-receiving state. After the other end is reoccupied, the locomotive automatically lowers the front bow at the other end, and the automatic end-switching is completed. However, when the locomotive is parked in a phase-splitting area (i.e., an unpowered area. When the substation provides 25kV high-voltage electricity of different phases, an unpowered area is required to isolate the high-voltage electricity of different phases to prevent short circuits), if the driver mistakenly operates the automatic end-switching switch, the locomotive automatically raises both bows, which can cause a short circuit in the contact network, trip the substation, and damage the locomotive's own high-voltage box, with very serious consequences for both the railway line and the locomotive itself. Summary of the Invention

[0003] The purpose of the present invention is to provide an electric locomotive and its safe end-changing device, control method, and storage medium to solve the problem of safety accidents of the railway line and the locomotive itself caused by the driver's misoperation of the automatic end-changing switch when the locomotive is in a phase-free zone.

[0004] The present invention solves the above technical problems through the following technical solutions: a safe end-changing device for an electric locomotive, comprising a first end-changing switch, a second end-changing switch, and a control unit, wherein the first end-changing switch is provided in a first driver's cab, and the second end-changing switch is provided in a second driver's cab; the first end-changing switch and the second end-changing switch are both used to generate an end-changing instruction;

[0005] The control unit is used to activate the end change process according to the first end change instruction generated by the first end change switch or the second end change switch, determine whether the first end change instruction is an erroneous operation instruction, and control the pantograph action according to the judgment result to avoid double pantograph current collection during erroneous operation.

[0006] Furthermore, the control unit is configured to determine whether the first end-switch instruction is an erroneous operation instruction, specifically including:

[0007] Determining whether a second end-change instruction is received; wherein the second end-change instruction and the first end-change instruction are from the same end-change switch;

[0008] If the second end-switch instruction is received, the first end-switch instruction is an erroneous operation instruction; otherwise, the first end-switch instruction is a normal operation instruction.

[0009] Furthermore, the control unit is used to control the pantograph action according to the judgment result, specifically including:

[0010] If the first end-changing instruction is an erroneous operation instruction, the other pantograph will not be controlled to be raised, the single pantograph will be kept receiving current, and the end-changing process will be exited;

[0011] If the first end-changing instruction is a normal operation instruction, it is determined whether the driver's cab re-occupancy instruction is received. If the driver's cab re-occupancy instruction is received, the other pantograph is first controlled to rise, and then the pantograph that was originally raised is controlled to be lowered, thereby ending the end-changing process; wherein, the driver's cab re-occupancy instruction and the first end-changing instruction come from different driver's cabs.

[0012] Furthermore, the first end-changing switch and the second end-changing switch are hardware switches or software switches on a display screen in the driver's cab.

[0013] Furthermore, the control unit is a train control unit CCU.

[0014] Based on the same concept, the present invention provides an electric locomotive, which is provided with the electric locomotive safety end-changing device as described above.

[0015] Based on the same concept, the present invention provides a control method for the electric locomotive safety end-changing device as described above, comprising:

[0016] activating a terminal switching process according to the received first terminal switching instruction;

[0017] Determine whether the first end-changing instruction is an erroneous operation instruction, and control the pantograph action according to the determination result to avoid double pantographs receiving current during erroneous operation.

[0018] Furthermore, the determining whether the first end-switch instruction is an erroneous operation instruction includes:

[0019] Determining whether a second end-change instruction is received; wherein the second end-change instruction and the first end-change instruction are from the same end-change switch;

[0020] If the second end-switch instruction is received, the first end-switch instruction is an erroneous operation instruction; otherwise, the first end-switch instruction is a normal operation instruction.

[0021] Furthermore, controlling the pantograph action according to the judgment result includes:

[0022] If the first end-changing instruction is an erroneous operation instruction, the other pantograph will not be controlled to be raised, the single pantograph will be kept receiving current, and the end-changing process will be exited;

[0023] If the first end-changing instruction is a normal operation instruction, it is determined whether a driver's cab re-occupancy instruction is received. If the driver's cab re-occupancy instruction is received, the other pantograph is first controlled to be raised, and then the pantograph that was originally raised is controlled to be lowered, thereby ending the end-changing process;

[0024] Among them, the driver's cab re-occupancy instruction and the first end change instruction come from different driver's cabs.

[0025] Based on the same concept, the present invention provides a storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the above-mentioned electric locomotive safety terminal switching device control method.

[0026] Beneficial effects

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] The present invention optimizes the control method for raising dual pantographs in the end-changing process, improving it from the original single confirmation (i.e., raising dual pantographs by operating the end-changing switch) to multi-level confirmation, effectively avoiding problems such as contact network short circuit, substation tripping, and explosion damage of the locomotive's own high-voltage box caused by driver's misoperation, thereby improving the safety of railway lines and locomotives.

[0029] The present invention can be implemented by modifying the control logic based on the original control unit of the electric locomotive without modifying the hardware equipment and electrical circuits. It is simple and easy to implement, can quickly and effectively achieve safety protection during the end-changing process of the electric locomotive, and has good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a flow chart of a control method for a safe end-changing device for an electric locomotive in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0033] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0034] Example 1

[0035] An embodiment of the present invention provides a safe end-changing device for an electric locomotive, including a first end-changing switch, a second end-changing switch and a control unit. The first end-changing switch is provided in a first driver's cab, and the second end-changing switch is provided in a second driver's cab. Both the first end-changing switch and the second end-changing switch are used to generate an end-changing instruction.

[0036] The control unit is used to activate the end change process according to the first end change instruction generated by the first end change switch or the second end change switch, determine whether the first end change instruction is an erroneous operation instruction, and control the pantograph action according to the judgment result to avoid double pantograph current collection during erroneous operation.

[0037] When the driver operates the first end-changing switch or the second end-changing switch, a first end-changing instruction is generated, and the control unit activates the end-changing process according to the first end-changing instruction; if the control unit determines that the first end-changing instruction is an erroneous operation instruction, it will not control the other pantograph to rise, and still keep the single pantograph receiving current, and exit the end-changing process. The locomotive maintains the single pantograph receiving current unchanged during the whole process; if the control unit determines that the first end-changing instruction is a normal operation instruction, it will control the other pantograph to rise after reconfirmation (in this embodiment, it is confirmed by reoccupying another driver's cab), realize the double pantograph current, and then automatically lower the originally raised pantograph to complete the end-changing process. The present invention will only raise the other pantograph after receiving the first end-changing instruction, determining that the first end-changing instruction is a normal operation instruction and reconfirming it. After multiple confirmations by the driver, it effectively avoids problems such as contact network short circuit, substation tripping, and locomotive high-voltage box explosion caused by the driver's erroneous operation of the end-changing switch.

[0038] In a specific embodiment of the present invention, the control unit is configured to determine whether the first terminal switching instruction is an erroneous operation instruction, specifically including:

[0039] Determining whether a second end-change instruction is received; wherein the second end-change instruction and the first end-change instruction are from the same end-change switch;

[0040] If the second end-switch instruction is received, the first end-switch instruction is an erroneous operation instruction; otherwise, the first end-switch instruction is a normal operation instruction.

[0041] Generally speaking, when the driver operates in the cab at one end, he raises the pantograph in the cab at the other end by closing the electric key at that end, and closes the main circuit breaker at the other end, so that the electric energy on the contact network reaches the locomotive through the pantograph and main circuit breaker at the other end, thereby realizing the operation of the locomotive.

[0042] Assume that the first driver's cab end corresponds to the first pantograph, and the second driver's cab end corresponds to the second pantograph. For example, when the driver is operating in the first driver's cab, the second pantograph is raised by closing the electric key at the first end, and the main circuit breaker at the second end is closed, so that the electric energy on the contact network reaches the locomotive through the second pantograph and the main circuit breaker at the second end, thereby realizing the operation of the locomotive. When the locomotive reaches the destination in the current direction of travel and needs to change direction (that is, the locomotive is stationary and meets other end-changing conditions), the driver operates the first end-changing switch in the first driver's cab to generate a first end-changing instruction, activating the end-changing process. At this time, the second pantograph is kept receiving current and the first pantograph will not be automatically raised. If the end-changing process is activated by the driver's mistake, the driver can operate the first end-changing switch again to generate a second end-changing instruction. When the control unit receives the second end-changing instruction, it determines that the first end-changing instruction is an erroneous operation instruction and exits the end-changing process. At this time, the second pantograph is still kept receiving current, that is, the entire end-changing process keeps the single pantograph receiving current and does not raise the double pantograph.

[0043] If the control unit does not receive the second end-changing instruction, it will determine that the first end-changing instruction is a normal operation instruction. After further confirmation by the driver, the first pantograph will be automatically raised. At this time, both the first pantograph and the second pantograph are raised and are in a double-bow current-collecting state. After the double pantographs are raised, the second pantograph will be automatically lowered, and only the first pantograph will be kept raised, ending the end-changing process.

[0044] In a specific embodiment of the present invention, the control unit is used to control the pantograph action according to the judgment result, specifically including:

[0045] If the first end-changing instruction is a wrong operation instruction (the control unit receives the second end-changing instruction), the other pantograph will not be controlled to rise, the single pantograph will be kept receiving current, and the end-changing process will be exited;

[0046] If the first end-changing instruction is a normal operation instruction, it is determined whether the driver's cab re-occupancy instruction is received (the driver confirms again whether the end-changing operation is a normal operation). If the driver's cab re-occupancy instruction is received, the other pantograph is first controlled to rise, and then the pantograph that was originally raised is controlled to be lowered to end the end-changing process; wherein, the driver's cab re-occupancy instruction and the first end-changing instruction come from different driver's cabs.

[0047] Exemplarily, the driver operates the first end-changing switch in the first driver's cab to generate the first end-changing instruction, activating the end-changing process. At this time, the second pantograph is kept receiving current, and the first pantograph will not be automatically raised; if the first end-changing instruction is a normal operation instruction, the driver exits the occupation of the first driver's cab end (pulls out the key), and then goes to the second driver's cab to re-occupy the second driver's cab end (inserts the key, that is, the control unit receives the re-occupation instruction), controls the first pantograph to rise, and at this time, both the first pantograph and the second pantograph are raised, and are in a double-pantograph current-receiving state; after the double pantographs are raised, the second pantograph is automatically lowered, and only the first pantograph is kept raised, ending the end-changing process.

[0048] Regardless of whether it is an erroneous operation end-changing process or a normal end-changing process, uninterrupted power supply can be achieved throughout the entire end-changing process. At the same time, it can avoid problems such as contact network short circuit, substation tripping, and locomotive high-voltage box explosion caused by erroneous operation to activate the end-changing process, ensuring the normal operation of the railway line and the normal operation of the electric locomotive, and improving the safety of the railway line and locomotive vehicles.

[0049] In a specific embodiment of the present invention, the first end-changing switch and the second end-changing switch are hardware switches or software switches on a display screen in the driver's cab.

[0050] In a specific embodiment of the present invention, the control unit is a train control unit CCU (Central Control Unit).

[0051] Example 2

[0052] An embodiment of the present invention provides an electric locomotive, which is provided with the electric locomotive safety end-changing device in Example 1 of the present application.

[0053] Example 3

[0054] like Figure 1 As shown, the embodiment of the present invention provides a method for controlling the electric locomotive safety end-changing device as described in Example 1 of the present application, comprising the following steps:

[0055] Step 1: Activate the end switching process according to the received first end switching instruction;

[0056] Step 2: Determine whether the first end-changing instruction is an erroneous operation instruction, and control the pantograph action according to the judgment result to avoid double pantograph current collection during erroneous operation.

[0057] In a specific embodiment of the present invention, determining whether the first end-switch instruction is an erroneous operation instruction specifically includes:

[0058] Determining whether a second end-change instruction is received; wherein the second end-change instruction and the first end-change instruction are from the same end-change switch;

[0059] If the second end-switch instruction is received, the first end-switch instruction is an erroneous operation instruction; otherwise, the first end-switch instruction is a normal operation instruction.

[0060] Assume that the first driver's cab end corresponds to the first pantograph, and the second driver's cab end corresponds to the second pantograph. For example, when the driver operates in the first driver's cab, the second pantograph rises, so that the electric energy on the contact network reaches the locomotive through the second pantograph, thereby realizing the operation of the locomotive. When the locomotive reaches the destination in the current direction of travel and needs to reverse (that is, the locomotive is stationary and meets other end-changing conditions), the driver operates the first end-changing switch in the first driver's cab to generate a first end-changing instruction and activate the end-changing process. At this time, the second pantograph is kept receiving current and the first pantograph will not be automatically raised; if the end-changing process is activated by the driver's misoperation, the driver can operate the first end-changing switch again to generate a second end-changing instruction. When the control unit receives the second end-changing instruction, it determines that the first end-changing instruction is an erroneous operation instruction and exits the end-changing process. At this time, the second pantograph is still kept receiving current, that is, the entire end-changing process keeps a single pantograph receiving current and the double pantographs are not raised.

[0061] In a specific embodiment of the present invention, controlling the pantograph action according to the judgment result specifically includes:

[0062] If the first end-changing instruction is an erroneous operation instruction, the other pantograph will not be controlled to rise, the single pantograph will be kept receiving current, and the end-changing process will be exited;

[0063] If the first end-changing instruction is a normal operation instruction, it is determined whether the driver's cab re-occupancy instruction is received (the driver confirms again whether the end-changing operation is a normal operation). If the driver's cab re-occupancy instruction is received, the other pantograph is first controlled to rise, and then the pantograph that was originally raised is controlled to be lowered to end the end-changing process; wherein, the driver's cab re-occupancy instruction and the first end-changing instruction come from different driver's cabs.

[0064] Exemplarily, the driver operates the first end-changing switch in the first driver's cab to generate the first end-changing instruction, activating the end-changing process. At this time, the second pantograph is kept receiving current, and the first pantograph will not be automatically raised; if the first end-changing instruction is a normal operation instruction, the driver exits the occupation of the first driver's cab end (pulls out the key), and then goes to the second driver's cab to re-occupy the second driver's cab end (inserts the key, that is, the control unit receives the re-occupation instruction), controls the first pantograph to rise, and at this time, both the first pantograph and the second pantograph are raised, and are in a double-pantograph current-receiving state; after the double pantographs are raised, the second pantograph is automatically lowered, and only the first pantograph is kept raised, ending the end-changing process.

[0065] Regardless of whether it is an erroneous operation end-changing process or a normal end-changing process, uninterrupted power supply can be achieved throughout the entire end-changing process. At the same time, it can avoid problems such as contact network short circuit, substation tripping, and locomotive high-voltage box explosion caused by erroneous operation to activate the end-changing process, ensuring the normal operation of the railway line and the normal operation of the electric locomotive, and improving the safety of the railway line and locomotive vehicles.

[0066] Example 4

[0067] An embodiment of the present invention further provides a storage medium on which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, the control method of the electric locomotive safety terminal switching device in the embodiment of the present application is implemented.

[0068] Storage media in embodiments of the present invention include permanent and non-permanent, removable and non-removable items that can be used to store information using any method or technology. Examples of storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

[0069] The above disclosure is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, and they should all be covered by the scope of protection of the present invention.

Claims

1. A safe end-changing device for an electric locomotive, comprising a first end-changing switch, a second end-changing switch, and a control unit, wherein the first end-changing switch is located in a first driver's cab, and the second end-changing switch is located in a second driver's cab; both the first end-changing switch and the second end-changing switch are used to generate an end-changing instruction; and characterized in that: The control unit is configured to activate the end-changing process according to the first end-changing instruction generated by the first end-changing switch or the second end-changing switch, determine whether the first end-changing instruction is an erroneous operation instruction, and control the pantograph action according to the determination result to avoid double pantograph current collection in the event of erroneous operation; The control unit is used to control the pantograph action according to the judgment result, specifically including: If the first end-changing instruction is an erroneous operation instruction, the other pantograph will not be controlled to be raised, the single pantograph will be kept receiving current, and the end-changing process will be exited; If the first end-changing instruction is a normal operation instruction, it is determined whether the driver's cab re-occupancy instruction is received. If the driver's cab re-occupancy instruction is received, the other pantograph is first controlled to rise, and then the pantograph that was originally raised is controlled to be lowered, thereby ending the end-changing process; wherein, the driver's cab re-occupancy instruction and the first end-changing instruction come from different driver's cabs.

2. The electric locomotive safety end-changing device according to claim 1, characterized in that: The control unit is configured to determine whether the first end-switch instruction is an erroneous operation instruction, specifically including: Determining whether a second end-change instruction is received; wherein the second end-change instruction and the first end-change instruction are from the same end-change switch; If the second end-switch instruction is received, the first end-switch instruction is an erroneous operation instruction; otherwise, the first end-switch instruction is a normal operation instruction.

3. The electric locomotive safety end-changing device according to claim 1 or 2, characterized in that: The first end-changing switch and the second end-changing switch are hardware switches or software switches on a display screen in the driver's cab.

4. The electric locomotive safety end-changing device according to claim 1 or 2, characterized in that: The control unit is a train control unit CCU.

5. An electric locomotive, characterized in that: The electric locomotive is provided with the electric locomotive safety end-changing device according to any one of claims 1 to 4.

6. A control method for a safe end-changing device of an electric locomotive according to any one of claims 1 to 4, characterized in that: The control method includes: activating a terminal switching process according to the received first terminal switching instruction; Determine whether the first end-changing instruction is an erroneous operation instruction, and control the pantograph action according to the determination result to avoid double pantographs receiving current during erroneous operation.

7. The electric locomotive safety end-changing device control method according to claim 6, characterized in that: Determining whether the first end-switch instruction is an erroneous operation instruction includes: Determining whether a second end-change instruction is received; wherein the second end-change instruction and the first end-change instruction are from the same end-change switch; If the second end-switch instruction is received, the first end-switch instruction is an erroneous operation instruction; otherwise, the first end-switch instruction is a normal operation instruction.

8. The electric locomotive safety end-changing device control method according to claim 6 or 7, characterized in that: The controlling of the pantograph action according to the judgment result includes: If the first end-changing instruction is an erroneous operation instruction, the other pantograph will not be controlled to be raised, the single pantograph will be kept receiving current, and the end-changing process will be exited; If the first end-changing instruction is a normal operation instruction, it is determined whether a driver's cab re-occupancy instruction is received. If the driver's cab re-occupancy instruction is received, the other pantograph is first controlled to be raised, and then the pantograph that was originally raised is controlled to be lowered, thereby ending the end-changing process; Among them, the driver's cab re-occupancy instruction and the first end change instruction come from different driver's cabs.

9. A storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instruction is executed by a processor, the electric locomotive safety end-changing device control method according to any one of claims 6 to 8 is implemented.

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