High-voltage interlock protection devices and methods for rail vehicles and rail vehicles

Abstract

This invention provides a high-voltage interlock protection device, method, and rail vehicle for railway vehicles. The device includes: N power supply unit operation modules, a grounding switch interlock module, N grounding switch modules, and a safety interlock box, wherein N ≥ 2. The i-th power supply unit operation module controls the activation of the i-th group of power supply units in the rail vehicle, and the i-th grounding switch module controls the grounding of the i-th group of power supply units. The grounding switch interlock module unlocks after all power supply unit operation modules have deactivated the corresponding power supply unit, and also unlocks the grounding switch modules. The safety interlock box unlocks after all grounding switch modules have placed their corresponding grounding switches in the grounded position, and unlocks the corresponding equipment using a built-in device key. This invention addresses the shortcomings of existing technologies where high-voltage interlock protection is difficult to achieve in rail vehicles with multiple power supply units, and achieves high safety and high reliability in high-voltage interlock protection for multi-power supply unit rail vehicles.

Description

Technical Field

[0001] This invention relates to the field of high-voltage protection technology for rail vehicles, and in particular to a high-voltage interlock protection device, method, and rail vehicle for rail vehicles. Background Technology

[0002] High-voltage interlock protection systems are a crucial component of high-voltage safety protection systems for rail vehicles, directly impacting the personal safety of rail vehicle operators and the protection and safe operation of high-voltage equipment. In recent years, with the increasing number of rail vehicles put into service, high-voltage interlock protection systems have gradually become a key focus of current work.

[0003] Currently, with the widespread application of rail vehicles, the requirements for the safety and reliability of the vehicle's high-voltage system are becoming increasingly stringent. A considerable number of rail vehicles include at least two power supply units, which supply power to the traction motors. These units specifically include a pantograph power supply unit and a diesel engine power pack power supply unit, with the pantograph and power pack using the same power supply system. During high-voltage interlock protection, it is crucial to ensure that all power supply units are disconnected and effectively grounded before performing maintenance on the undercarriage traction converter box or external power source to guarantee high-voltage safety. Therefore, designing a corresponding high-voltage interlock protection system for current multi-power supply unit rail vehicles to meet their high-voltage safety protection requirements and ensure high safety and reliability is a pressing technical problem that needs to be solved. Summary of the Invention

[0004] This invention provides a high-voltage interlock protection device for rail vehicles, which solves the problem that it is difficult to achieve high-voltage interlock protection when rail vehicles have multiple power supply units in the prior art, and realizes high safety and high reliability of high-voltage interlock protection for rail vehicles with multiple power supply units.

[0005] This invention provides a high-voltage interlock protection device for rail vehicles, comprising: N power supply unit operation modules, a grounding switch interlock module, N grounding switch modules, and a safety interlock box, wherein N≥2, the i-th power supply unit operation module is used to control the activation of the i-th group of power supply units of the rail vehicle, and the i-th grounding switch module is used to control the grounding of the i-th group of power supply units;

[0006] The grounding switch interlocking module is used to unlock after all power supply unit operation modules have disconnected the corresponding power supply unit, and to unlock the grounding switch module.

[0007] The safety interlock box is used to unlock the corresponding grounding switch after all grounding switch modules have placed the corresponding grounding switch in the grounding position, and to unlock the corresponding device using the built-in device key.

[0008] According to the present invention, a high-voltage interlock protection device for rail vehicles is provided, wherein the power supply unit operation module includes an interlocked pantograph pneumatic handle and a first pneumatic lock.

[0009] The grounding switch interlocking module includes N sets of interlocked second gas circuit locks and first grounding switch locks. The first gas circuit locks correspond one-to-one with the second gas circuit locks, and the corresponding first gas circuit locks and second gas circuit locks are unlocked by the same gas circuit lock key.

[0010] The grounding switch module includes a second grounding switch lock, a first safety lock, and a grounding switch handle. The second grounding switch lock is interlocked with the first safety lock, and the first safety lock is interlocked with the grounding switch handle. The first grounding switch lock and the second grounding switch lock are in one-to-one correspondence, and the corresponding first grounding switch lock and the second grounding switch lock are unlocked by the same grounding switch lock key.

[0011] The safety interlock box includes a safety interlock group and an equipment key group. The safety interlock group and the equipment key group are interlocked. The safety interlock group includes N second safety locks. The first safety lock and the second safety lock correspond one-to-one, and the corresponding first safety lock and second safety lock are unlocked by the same safety lock key. The equipment key group includes several equipment keys for unlocking the corresponding equipment.

[0012] According to the present invention, in a high-voltage interlock protection device for rail vehicles, the first grounding switch lock is unlocked after all the second air circuit locks are unlocked by the grounding switch interlock module.

[0013] According to the present invention, a high-voltage interlock protection device for rail vehicles is provided, wherein the pneumatic lock key, the grounding switch lock key, the safety lock key, and the equipment key are distinguished by different colors, and the first pneumatic lock and the second pneumatic lock are both the same color as the pneumatic lock key, the first grounding switch lock and the second grounding switch lock are both the same color as the grounding switch lock key, and the first safety lock and the second safety lock are both the same color as the safety lock key.

[0014] According to the present invention, each of the power supply unit operation modules further includes a normally open contact and a normally closed contact. The normally closed contact is disconnected after the pantograph air circuit handle is operated to lower the pantograph, so that the corresponding power pack control box receives a low-level signal. When the power pack control box receives the low-level signal, it controls the power pack to stop and maintains the stop.

[0015] The normally open contact closes after the pantograph air circuit handle is operated to lower the pantograph, causing the vehicle network to receive a high-level signal. After receiving the high-level signal, the vehicle network control network display shows that the pantograph is disconnected, and ignores the pantograph raising command or engine starting command when the vehicle network receives the command.

[0016] According to the present invention, a high-voltage interlock protection device for rail vehicles is provided in which, under normal vehicle network conditions, the power pack control box receives a start-up command through the vehicle network or a hard-wired circuit; and under vehicle network failure conditions, the power pack control box receives a start-up command through a hard-wired circuit.

[0017] According to the present invention, a high-voltage interlock protection device for rail vehicles is provided, wherein the pantograph pneumatic handle is a two-position three-way valve.

[0018] According to the present invention, a high-voltage interlock protection device for rail vehicles is provided, wherein the power supply unit operation module, the grounding switch interlock module, the grounding switch module and the safety interlock box are all located in the carriage where the pantograph of the rail vehicle is located.

[0019] The present invention also provides a high-voltage interlock protection method for rail vehicles, applied to the aforementioned high-voltage interlock protection device for rail vehicles, comprising:

[0020] The power supply unit operation module disconnects all power supply units from operation;

[0021] After ensuring that the power supply unit operation module disconnects all power supply units from operation, unlock the interlocking module.

[0022] The grounding switch module is unlocked by opening the interlocking module, and all grounding switches are placed in the grounding position by the grounding switch module.

[0023] After ensuring that the grounding switch module has placed all grounding switches in the grounded position, unlock the safety interlock box.

[0024] The corresponding device can be unlocked using the device key built into the security interlock box.

[0025] The present invention also provides a rail vehicle including the high-voltage interlock protection device for rail vehicles described in any of the above claims.

[0026] This invention provides a high-voltage interlock protection device for rail vehicles. By setting up a grounding switch interlock module, after the power supply unit operation module disconnects all power supply units, indicating that all pantographs or diesel engine power packs have been disconnected from power, the grounding switch interlock module unlocks to unlock subsequent grounding switch modules. At this point, the grounding switch needs to be operated to reliably ground the power supply system, ensuring safety. After all grounding switch modules have placed their corresponding grounding switches in the grounded position, indicating that all power supply units are reliably grounded, vehicle equipment can be inspected. The safety interlock box then unlocks, and the corresponding equipment can be unlocked using the built-in equipment key for inspection. This invention uses the grounding switch interlock module and the safety interlock box to respectively realize the interlock confirmation of power supply unit disconnection and grounding switch grounding, ensuring that the overall power supply to the vehicle is disconnected and effectively grounded, ultimately achieving high-voltage safety protection. This solves the defect in existing technologies where high-voltage interlock protection is difficult to achieve in rail vehicles with multiple power supply units, achieving high safety and high reliability in high-voltage interlock protection for multi-power supply unit rail vehicles. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the high-voltage interlock protection device for rail vehicles provided by the present invention;

[0029] Figure 2 This is a schematic diagram of the power supply unit operation module of the high-voltage interlock protection device for rail vehicles provided by the present invention;

[0030] Figure 3 This is a flowchart illustrating the high-voltage interlock protection method for rail vehicles provided by the present invention.

[0031] Reference numerals in the attached diagram: Power supply unit operation module 1, pantograph pneumatic handle 11, first pneumatic lock 12, pneumatic lock key 13, grounding switch interlocking module 2, second pneumatic lock 21, first grounding switch lock 22, grounding switch lock key 23, grounding switch module 3, grounding switch handle 31, second grounding switch lock 32, first safety lock 33, safety lock key 34, safety interlock box 4, safety interlock group 41, equipment key group 42, normally open contact K1, normally closed contact K2, hard wire control line S1, network control line S2. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0033] The following is combined Figure 1 and Figure 2 The first embodiment of the present invention is described.

[0034] A high-voltage interlock protection device for rail vehicles includes: N power supply unit operation modules 1, grounding switch interlocking module 2, N grounding switch modules 3, and safety interlock box 4, wherein N≥2, the i-th power supply unit operation module is used to control the activation of the i-th group of power supply units of the rail vehicle, and the i-th grounding switch module 3 is used to control the grounding of the i-th group of power supply units.

[0035] The grounding switch interlocking module is used to unlock after all power supply unit operation modules have disconnected the corresponding power supply unit, and to unlock the grounding switch module.

[0036] The safety interlock box 4 is used to unlock after all grounding switch modules 3 have placed the corresponding grounding switch in the grounding position, and to unlock the corresponding device using the built-in device key.

[0037] like Figure 1 As shown, a typical rail vehicle includes two power supply units. Each power supply unit includes a pantograph and a diesel engine power pack for power supply, and each power supply unit corresponds to a grounding switch for grounding. Therefore, in this embodiment, N=2, meaning the rail vehicle in this embodiment includes two pantographs respectively installed on cars M1 and M2, and two power packs respectively installed on the head car and tail car. Cars M1 and M2 each have a power supply unit operation module 1 and a grounding switch module 3. The power supply unit operation module 1 controls the activation of the power supply unit to supply power to the traction motor, and the grounding switch module 3 controls the grounding of the corresponding power supply unit. The grounding switch interlocking module 2 is located in car M2, and the safety interlock box 4 is located in car M1.

[0038] The power supply unit operation module 1 includes an interlocked pantograph pneumatic handle 11 and a first pneumatic lock 12. The pantograph pneumatic handle 11 is a two-position three-way valve, which controls the raising and lowering of the pantograph. A pneumatic lock key 13 is inserted into the first pneumatic lock 12. The pantograph pneumatic handle 11 and the first pneumatic lock 12 are interlocked, meaning that the pantograph must be lowered by operating the pantograph pneumatic handle 11 before the pneumatic lock key 13 can be removed from the first pneumatic lock 12.

[0039] The grounding switch interlocking module 2 includes two sets of interlocked second gas locks 21 and first grounding switch locks 22. The first gas locks 12 and second gas locks 21 are one-to-one; that is, the second gas lock 21 on the left side of the grounding switch interlocking module 2 corresponds to the first gas lock 12 of the left power supply unit operation module 1, and the second gas lock 21 on the right side corresponds to the first gas lock 12 of the right power supply unit operation module 1. The corresponding first gas locks 12 and second gas locks 21 are unlocked using the same gas lock key 13. Simultaneously, each second gas lock 21 is interlocked with the first grounding switch lock 22 below it. Each first grounding switch lock 22 has a grounding switch lock key 23 inserted into it. That is, the grounding switch lock key 23 can only be retrieved from the corresponding first grounding switch lock 22 after the gas lock key 13 is inserted into the second gas lock 21 to unlock it. To further improve security, in this embodiment, it is configured that all second gas locks 21 of the grounding switch interlocking module 2 must be unlocked before the grounding switch lock key 23 of the first grounding switch lock 22 can be retrieved.

[0040] The grounding switch module 3 includes a second grounding switch lock 32, a first safety lock 33, and a grounding switch handle 31. The second grounding switch lock 32 is interlocked with the first safety lock 33, and the first safety lock 33 is interlocked with the grounding switch handle 31. The first grounding switch lock 22 and the second grounding switch lock 32 correspond one-to-one. That is, the second grounding switch lock 32 of the grounding switch module 3 on the left side of the figure corresponds to the second gas lock 21 on the left side of the grounding switch interlocking module 2, and the second grounding switch lock 32 of the grounding switch module 3 on the right side corresponds to the second gas lock 21 on the right side of the grounding switch interlocking module 2. The corresponding first grounding switch lock 22 and second grounding switch lock 32 are unlocked by the same grounding switch lock key 23. Meanwhile, the second grounding switch lock 32 is interlocked with the first safety lock 33, and the first safety lock 33 is interlocked with the grounding switch handle 31. Each of the first safety locks 33 has a safety lock key 34 inserted into it. That is, after the grounding switch key is inserted into the corresponding second grounding switch lock 32 to unlock it, and the grounding switch handle 31 is operated to put the grounding switch of the corresponding compartment into the grounding position, the safety lock key 34 can be taken out from the corresponding first safety lock 33.

[0041] The safety interlock box 4 includes a safety interlock group 41 and an equipment key group 42. The safety interlock group 41 and the equipment key group 42 are interlocked. The equipment key group 42 includes several equipment keys used to unlock corresponding equipment. In this embodiment, the safety interlock group 41 includes two second safety locks. The first safety lock 33 corresponds one-to-one with the second safety lock. That is, the second safety lock on the upper part of the safety interlock box 4 corresponds to the first safety lock 33 of the left grounding switch module 3, and the second safety lock on the lower part corresponds to the first safety lock 33 of the right grounding switch module 3. The corresponding first safety lock 33 and second safety lock are unlocked by the same safety lock key 34. At the same time, the safety interlock group 41 and the equipment key group 42 are interlocked. That is, when the safety lock key 34 is inserted into the corresponding second safety lock to unlock all the second safety locks in the safety interlock box 4, the equipment key group 42 can be unlocked to take out the seven equipment keys C1 to C7 in the figure, which are used to unlock C1 to C7 and perform maintenance on the corresponding equipment.

[0042] This embodiment provides a high-voltage interlock protection device for rail vehicles. By setting up a grounding switch interlock module, after the power supply unit operation module disconnects the power supply units, indicating that all pantographs or diesel engine power packs have been disconnected from power, the grounding switch interlock module unlocks to unlock subsequent grounding switch modules. At this point, the grounding switch needs to be operated to reliably ground the power supply system, ensuring safety. After all grounding switch modules have placed their corresponding grounding switches in the grounded position, indicating that all power supply units are reliably grounded, vehicle equipment can be inspected. The safety interlock box then unlocks, and the corresponding equipment can be unlocked using the built-in equipment key for inspection. This invention uses the grounding switch interlock module and the safety interlock box to respectively realize the interlock confirmation of power supply unit disconnection and grounding switch grounding, ensuring that the overall power supply to the vehicle is disconnected and effectively grounded, ultimately achieving high-voltage safety protection. This solves the defect in existing technologies where high-voltage interlock protection is difficult to achieve when rail vehicles have multiple power supply units, achieving high safety and high reliability in high-voltage interlock protection for multi-power supply unit rail vehicles.

[0043] In this embodiment, each of the power supply unit operation modules 1 includes an interlocked pantograph pneumatic handle 11 and a first pneumatic lock 12;

[0044] The grounding switch interlocking module 2 includes N sets of interlocked second gas circuit locks 21 and first grounding switch locks 22. The first gas circuit locks 12 and the second gas circuit locks 21 correspond one-to-one, and the corresponding first gas circuit locks 12 and second gas circuit locks 21 are unlocked by the same gas circuit lock key 13.

[0045] Each of the grounding switch modules 3 includes a second grounding switch lock 32, a first safety lock 33, and a grounding switch handle 31. The second grounding switch lock 32 is interlocked with the first safety lock 33, and the first safety lock 33 is interlocked with the grounding switch handle 31. The first grounding switch lock 22 and the second grounding switch lock 32 correspond one-to-one, and the corresponding first grounding switch lock 22 and the second grounding switch lock 32 are unlocked by the same grounding switch lock key 23.

[0046] The safety interlock box 4 includes a safety interlock group 41 and an equipment key group 42. The safety interlock group 41 and the equipment key group 42 are interlocked. The safety interlock group 41 includes N second safety locks. The first safety lock 33 corresponds one-to-one with the second safety lock, and the corresponding first safety lock 33 and second safety lock are unlocked by the same safety lock key 34. The equipment key group 42 includes several equipment keys for unlocking the corresponding equipment.

[0047] By adopting the above interlocking structure, the power supply to the entire vehicle is cut off and effectively grounded layer by layer, thus achieving high-voltage safety protection for maintenance work. The above structure is simple to operate, and the interlocking logic can be realized with fewer keys. The logic is clear and easy to operate, reducing the probability of operational errors and ensuring high reliability.

[0048] In this embodiment, after the grounding switch interlocking module 2 unlocks all the second gas circuit locks 21, the first grounding switch lock 22 is unlocked.

[0049] To further enhance safety, this embodiment is configured such that unlocking all the second gas circuit locks 21 of the grounding switch interlocking module 2 is required before the grounding switch lock key 23 of the first grounding switch lock 22 can be retrieved, thus ensuring that all pantographs are lowered and power supply is cut off.

[0050] In this embodiment, the gas circuit lock key 13, the grounding switch lock key 23, the safety lock key 34, and the equipment key are distinguished by different colors. The first gas circuit lock 12 and the second gas circuit lock 21 are the same color as the gas circuit lock key 13, the first grounding switch lock 22 and the second grounding switch lock 32 are the same color as the grounding switch lock key 23, and the first safety lock 33 and the second safety lock are the same color as the safety lock key 34.

[0051] Since the corresponding first pneumatic lock 12 and second pneumatic lock 21 are unlocked by the same pneumatic lock key 13, the corresponding first grounding switch lock 22 and second grounding switch lock 32 are unlocked by the same grounding switch lock key 23, and the corresponding first safety lock 33 and second safety lock are unlocked by the same safety lock key 34, the first pneumatic lock 12 and second pneumatic lock 21 are set to the same color as the pneumatic lock key 13, the first grounding switch lock 22 and second grounding switch lock 32 are set to the same color as the grounding switch lock key 23, and the first safety lock 33 and second safety lock are set to the same color as the safety lock key 34, and each of the three is a different color. This facilitates identification and reduces the rate of misoperation during operation.

[0052] In this embodiment, each power supply unit operation module 1 further includes a normally open contact K1 and a normally closed contact K2. The normally closed contact K2 is disconnected after the pantograph air circuit handle 11 is operated to lower the pantograph, so that the corresponding power pack control box receives a low-level signal. When the power pack control box receives a low-level signal, it controls the power pack to stop and maintains the stop.

[0053] The normally open contact K1 closes after the pantograph air circuit handle 11 is operated to lower the pantograph, causing the vehicle network to receive a high-level signal. After the vehicle network receives the high-level signal, the control network display shows that the pantograph is disconnected, and ignores the pantograph raising command or the start command when the vehicle network receives the pantograph raising command or the start command.

[0054] like Figure 2 As shown, the power pack control box of the rail vehicle is used to control the start and stop of the corresponding power pack. The pantograph pneumatic handle 11 of the power supply unit operation module 1 has a normally open contact K1 and a normally closed contact K2. When the two-position three-way valve of the pantograph pneumatic handle 11 is closed and the pantograph is lowered, the normally closed contact K2 will open, and the high level output to the power pack control box will change to a low level, so that the power pack control box receives a low level signal. After receiving the low level signal, the power pack control box controls the power pack to perform an emergency stop and remain stopped. Even if a start command is received later, the power pack will not start. This low-level emergency stop signal is the highest level. At this time, any start command given to the power pack control box will not start the power pack.

[0055] Simultaneously, the normally open contact K1 will close, causing the vehicle network to receive a high-level signal. Upon receiving this signal, the vehicle network control display will show that the pantograph is disconnected. When a pantograph raising or starting command is received, it will be ignored and not transmitted externally. Even if the pantograph raising button is pressed at this time, the vehicle network will not control the pantograph raising solenoid valve to operate, and will also cut off the air supply to the pantograph. Without an air source, the pantograph will not rise.

[0056] When controlling the pantograph to lower and cut off the power supply from the pantograph, the present invention also sets up circuit logic with normally open contact K1 and normally closed contact K2 to ensure that the power pack stops in time and does not start accidentally, thus ensuring the power supply to the power pack is cut off and further improving the safety of high voltage interlock.

[0057] In this embodiment, when the vehicle network is normal, the power pack control box receives the start command through the vehicle network or a hard-wired circuit. When the vehicle network fails, the power pack control box receives the start command through a hard-wired circuit.

[0058] When the vehicle network is functioning normally, the power pack control box can receive start commands via either the network control line S2 or the hard-wired control line S1. Under the action of normally open contact K1, the power pack control box will not start the power pack. In the event of a vehicle network failure, the power pack control box can only receive start commands via the hard-wired control line S1. Due to the action of normally closed contact K2, the power pack control line will still not start the power pack. This dual-signal transmission method ensures the reliability of the power pack control box in receiving start commands and prevents accidental start-ups.

[0059] In this embodiment, the pantograph pneumatic handle 11 is a two-position three-way valve.

[0060] The two-position three-way valve has the characteristics of good sealing performance, fast opening speed, good reliability and long service life, and is suitable as the pneumatic handle for controlling the raising and lowering of the pantograph in this embodiment.

[0061] In this embodiment, the power supply unit operation module 1, the grounding switch interlocking module 2, the grounding switch module 3, and the safety interlocking box 4 are all located in the carriage where the pantograph of the rail vehicle is located.

[0062] The supporting power supply unit operation module 1, grounding switch interlocking module 2, grounding switch module 3, and safety interlocking box 4 are all located in the carriage where the pantograph is located, which facilitates structural layout and operational convenience.

[0063] The high-voltage interlock protection method for rail vehicles provided in the second embodiment of the present invention is described below. The high-voltage interlock protection method for rail vehicles described below can be referred to in correspondence with the high-voltage interlock protection device for rail vehicles described above.

[0064] like Figure 3 As shown, a high-voltage interlock protection method for rail vehicles, applied to the aforementioned high-voltage interlock protection device for rail vehicles, includes:

[0065] Step S1: Disconnect all power supply units from operation via the power supply unit operation module.

[0066] Operate the pantograph pneumatic handle 11 of the power supply unit operation module to lower all pantographs, and at the same time ensure that the power pack is disconnected through the normally open and normally closed contacts of the power supply unit operation module.

[0067] Step S2: After ensuring that the power supply unit operation module disconnects all power supply units, unlock the interlocking module.

[0068] After ensuring that all power supply units are disconnected, remove the gas lock key 13 from the first gas lock 12 and insert it into the corresponding second gas lock 21 to unlock it. After all the second gas locks 21 are unlocked, remove the grounding switch key from the first grounding switch lock 22.

[0069] Step S3: Unlock the grounding switch module 3 by opening and closing the interlocking module, and put all grounding switches into the grounded position by opening and closing the grounding switch module 3.

[0070] After removing all the grounding switch keys, insert the corresponding second grounding switch lock 32 to unlock it, and operate the grounding switch handle 31 respectively to put the grounding switch of the corresponding carriage into the grounding position.

[0071] Step S4: After ensuring that all grounding switches in the grounding switch module 3 are in the grounded position, unlock the safety interlock box 4.

[0072] After confirming that all grounding switches are in the grounded position, take out the safety lock key 34 from the corresponding first safety lock 33, insert it into the second safety lock, and after all the second safety locks in the safety interlock box 4 are unlocked, the equipment key group 42 is unlocked.

[0073] Step S5: Unlock the corresponding device using the device key built into the security interlock box 4.

[0074] Take the corresponding device key from device key set 42, unlock the corresponding device, and then perform maintenance.

[0075] The steps to restore the high-voltage interlock are similar and include the following:

[0076] Step A1: After resetting all the equipment keys by inserting them back into the equipment key group 42, remove the safety lock key 34.

[0077] Step A2: Insert the safety lock key 34 back into the first safety lock 33 to unlock it. After returning the grounding switch to its normal position, remove the grounding switch lock key 23.

[0078] Step A3: After inserting all the grounding switch lock keys 23 back into the first grounding switch interlocking device and resetting it, remove the gas circuit lock keys 13 respectively.

[0079] Step A4: Insert the air circuit lock key 13 back into the first air circuit lock 12 to unlock it, raise the pantograph, and the vehicle can then work normally.

[0080] Accordingly, a third embodiment of the present invention also provides a rail vehicle including the rail vehicle high-voltage interlock protection device described in any of the above claims.

[0081] The rail vehicle provided in this embodiment, due to the adoption of the above-mentioned high-voltage interlock protection device for rail vehicles, can also achieve high safety and high reliability of high-voltage interlock protection for rail vehicles with multiple power supply units.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-voltage interlock protection device for rail vehicles, characterized in that, include: There are N power supply unit operation modules, grounding switch interlocking modules, N grounding switch modules and safety interlocking boxes, where N≥2. The i-th power supply unit operation module is used to control the activation of the i-th group of power supply units of the rail vehicle, and the i-th grounding switch module is used to control the grounding of the i-th group of power supply units. The grounding switch interlocking module is used to unlock after all power supply unit operation modules have disconnected the corresponding power supply unit, and to unlock the grounding switch module. The safety interlock box is used to unlock after all grounding switch modules have placed the corresponding grounding switch in the grounding position, and to unlock the corresponding device using the built-in device key. Each of the power supply unit operation modules includes an interlocked pantograph pneumatic handle and a first pneumatic lock; The grounding switch interlocking module includes N sets of interlocked second gas circuit locks and first grounding switch locks. The first gas circuit locks correspond one-to-one with the second gas circuit locks, and the corresponding first gas circuit locks and second gas circuit locks are unlocked by the same gas circuit lock key. Each of the grounding switch modules includes a second grounding switch lock, a first safety lock, and a grounding switch handle. The second grounding switch lock is interlocked with the first safety lock, and the first safety lock is interlocked with the grounding switch handle. The first grounding switch lock and the second grounding switch lock are in one-to-one correspondence, and the corresponding first grounding switch lock and the second grounding switch lock are unlocked by the same grounding switch lock key. The safety interlock box includes a safety interlock group and an equipment key group. The safety interlock group and the equipment key group are interlocked. The safety interlock group includes N second safety locks. The first safety lock and the second safety lock correspond one-to-one, and the corresponding first safety lock and second safety lock are unlocked by the same safety lock key. The equipment key group includes several equipment keys for unlocking the corresponding equipment. Each of the power supply unit operation modules also includes normally open contacts and normally closed contacts. The normally closed contacts are opened after the pantograph air circuit handle is operated to lower the pantograph, so that the corresponding power pack control box receives a low-level signal. When the power pack control box receives a low-level signal, it controls the power pack to stop and remains stopped. The normally open contact closes after the pantograph air circuit handle is operated to lower the pantograph, causing the vehicle network to receive a high-level signal. After receiving the high-level signal, the vehicle network control network display shows that the pantograph is disconnected, and ignores the pantograph raising command or engine starting command when the vehicle network receives the command.

2. The high-voltage interlock protection device for rail vehicles according to claim 1, characterized in that, The first grounding switch lock is unlocked after all the second gas circuit locks are unlocked by the grounding switch interlocking module.

3. The high-voltage interlock protection device for rail vehicles according to claim 1, characterized in that, The gas circuit lock key, grounding switch lock key, safety lock key, and equipment key are distinguished by different colors. The first gas circuit lock and the second gas circuit lock are both the same color as the gas circuit lock key, the first grounding switch lock and the second grounding switch lock are both the same color as the grounding switch lock key, and the first safety lock and the second safety lock are both the same color as the safety lock key.

4. The high-voltage interlock protection device for rail vehicles according to claim 1, characterized in that, When the vehicle network is functioning normally, the power pack control box receives the start command via the vehicle network or a hard-wired circuit. When the vehicle network fails, the power pack control box receives the start command via a hard-wired circuit.

5. The high-voltage interlock protection device for rail vehicles according to claim 1, characterized in that, The pantograph pneumatic handle is a two-position three-way valve.

6. The high-voltage interlock protection device for rail vehicles according to any one of claims 1 to 5, characterized in that, The power supply unit operation module, grounding switch interlocking module, grounding switch module, and safety interlocking box are all located in the carriage where the pantograph of the rail vehicle is located.

7. A method for high-voltage interlock protection of rail vehicles, applied to the high-voltage interlock protection device for rail vehicles as described in any one of claims 1 to 6, characterized in that, include: The power supply unit operation module disconnects all power supply units from operation; After ensuring that the power supply unit operation module disconnects all power supply units from operation, unlock the interlocking module. The grounding switch module is unlocked by opening the interlocking module, and all grounding switches are placed in the grounding position by the grounding switch module. After ensuring that the grounding switch module has placed all grounding switches in the grounded position, unlock the safety interlock box. The corresponding device can be unlocked using the device key built into the security interlock box.

8. A rail vehicle, characterized in that, include: The high-voltage interlock protection device for rail vehicles as described in any one of claims 1 to 6.

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