High-voltage interlock device and high-voltage interlock method for railway vehicle, and railway vehicle

Abstract

A high-voltage interlock device and high-voltage interlock method for a railway vehicle, and a railway vehicle. When an electric grounding key on a cab fault switch panel of the high-voltage interlock device is rotated to a locked position, a first-stage electric grounding key is unlocked; when the electric grounding key is inserted into a pantograph-lifting pneumatic circuit interlock box, and a first three-way valve handle (t1) is rotated to a pneumatic circuit cut-off position, a second-stage pneumatic circuit key is unlocked; and when the second-stage pneumatic circuit key is inserted into a locking device (300) and rotated, a converter box key (c) and a power supply box key (d) are unlocked. The high-voltage interlock method for a railway vehicle is applied to the high-voltage interlock device of a railway vehicle; and the railway vehicle comprises the high-voltage interlock device. In the device, double locking of circuits and pneumatic circuits is performed on a pantograph, such that the pantograph can be prevented from being electrified during maintenance, a main circuit breaker is prevented from being closed, a pantograph pneumatic circuit is prevented from being lifted during maintenance, and thus the operation for maintenance staff members is simplified, and the safety level of operation is improved.

Description

A high-voltage interlocking device for rail vehicles, a high-voltage interlocking method, and a rail vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202410056402.7 filed with the Patent Office of China on January 15, 2024, entitled “A high-voltage interlocking device for rail vehicles, a high-voltage interlocking method and a rail vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of locomotive high-voltage protection, and in particular to a rail vehicle high-voltage interlocking device, a high-voltage interlocking method, and a rail vehicle. Background Art

[0004] The high-voltage interlocking protection system is a crucial component of the high-voltage safety protection system for rail vehicles. It is crucial to the personal safety of rail vehicle operators and the protection and safe use of high-voltage equipment. With the increasing number of rail vehicles put into operation in recent years, the high-voltage interlocking protection system has gradually become a key focus.

[0005] Prior art methods include locking the pantograph air circuit and the grounding switch separately. The first method involves first shutting off the pantograph air valve using the air circuit handle, disconnecting the main circuit via the normally open and normally closed contacts. Next, the grounding switch is locked. Finally, the safety key is removed to unlock the corresponding equipment. The second method involves first shutting off the pantograph air valve using the air circuit shutoff valve. Next, the grounding switch for the pantograph circuit is closed. Finally, the inverter grounding switch is closed to allow maintenance of the inverter and power supply box. The third method uses a combination of key A and key B. Normally, key A is in the open position. When the left arm is struck, the pantograph circuit is disconnected due to an electrical interlock. Once the left arm is struck, key A can be removed. The pantograph's main circuit has a grounding switch. After key A is inserted, the grounding switch handle is rotated 180°, grounding the main circuit. Even if high voltage is present, it is discharged through the grounding switch, preventing any harm to the vehicle or personnel. After the grounding switch handle is rotated 180°, the B key can be pulled out and inserted into the interlock box and rotated. Once the keyholes of the interlock box are aligned, the operator can then perform power-off operations with the padlock locked. During the operation, the A and B keys cannot be pulled out, the grounding switch cannot be reset, the circuit is interlocked, and the pantograph cannot be raised. When the power-off operation is completed, the pantograph can be raised again after unlocking. However, the existing AB keys require manual closing of the grounding switch and the opening of the top plate. For the electric grounding switches on the latest trains, the AB keys do not need to be rotated 180°. In summary, the interlocking logic and structure of the three existing technologies are not suitable for the new train structure and operating requirements.

[0006] Summary of the Invention

[0007] In light of this, the present application aims to provide a high-voltage interlocking device for rail vehicles, a high-voltage interlocking method for such a device, and a rail vehicle. First, an electric grounding key switch simultaneously disconnects the pantograph raising circuit and the main circuit breaker, grounding the grounding switch. Second, the pantograph raising air circuit is disconnected. Finally, the safety key is removed, unlocking the corresponding equipment for power-off operation. This solves the problem that existing interlocking logic or structure is not suitable for train electric grounding switches.

[0008] In a first aspect, the present application provides a high-voltage interlocking device for a rail vehicle, comprising: a first driver's cab fault switch panel, a second driver's cab fault switch panel, a first bow lift gas circuit interlocking box, a second bow lift gas circuit interlocking box, and a locking device;

[0009] The first cab fault switch panel is interlocked with the first bow lift gas circuit interlock box, the second cab fault switch panel is interlocked with the second bow lift gas circuit interlock box, and the first bow lift gas circuit interlock box and the second bow lift gas circuit interlock box jointly interlock the locking device;

[0010] The first electric earthing key on the first cab fault switch panel is turned to the locked position to unlock the first electric earthing key; the second electric earthing key on the second cab fault switch panel is turned to the locked position to unlock the second electric earthing key;

[0011] Insert the first electric grounding key into the first bow lift gas circuit interlock box, rotate the first three-way valve handle on the first bow lift gas circuit interlock box to the gas circuit cut-off position, and unlock the first gas circuit key; insert the second electric grounding key into the second bow lift gas circuit interlock box, rotate the second three-way valve handle on the second bow lift gas circuit interlock box to the gas circuit cut-off position, and unlock the second gas circuit key;

[0012] The first gas circuit key and the second gas circuit key are inserted into the locking device at the same time and rotated to the maintenance position to unlock the converter box key and the power box key.

[0013] Furthermore, a first electric grounding key lock cylinder is provided on the first bow riser gas circuit interlock box, and the first electric grounding key corresponds to the first electric grounding key lock cylinder; a second electric grounding key lock cylinder is provided on the second bow riser gas circuit interlock box, and the second electric grounding key corresponds to the second electric grounding key lock cylinder;

[0014] The first bow-lift gas circuit interlock box is provided with a first gas circuit lock core, and the first gas circuit key corresponds to the first gas circuit lock core; the second bow-lift gas circuit interlock box is provided with a second gas circuit lock core, and the second gas circuit key corresponds to the second gas circuit lock core;

[0015] The first bow lift gas circuit interlock box is provided with a first three-way valve corresponding to the first three-way valve handle, and the second bow lift gas circuit interlock box is provided with a second three-way valve corresponding to the second three-way valve handle.

[0016] Furthermore, the locking device is provided with a first air circuit lock core, a second air circuit lock core, several converter box lock cores, several converter box keys corresponding to the several converter box lock cores, several power box lock cores, and several power box keys corresponding to the several power box lock cores.

[0017] Furthermore, the contacts of the first electric earthing key are respectively connected to the closed circuit of the first earthing switch, the power supply circuit of the first pantograph and the closed circuit of the first high-voltage circuit breaker; the contacts of the second electric earthing key are respectively connected to the closed circuit of the second earthing switch, the power supply circuit of the second pantograph and the closed circuit of the second high-voltage circuit breaker.

[0018] Furthermore, the first electric earthing key, the second electric earthing key, the first gas circuit key, the second gas circuit key, the inverter box key, and the power box key are set to different colors, and the first electric earthing key and the second electric earthing key have the same color, the first gas circuit key and the second gas circuit key have the same color, several inverter box keys have the same color, and several power box keys have the same color.

[0019] In a second aspect, the present application further provides a high-voltage interlocking method for a rail vehicle, which is applied to the high-voltage interlocking device of the above-mentioned rail vehicle and comprises the following steps:

[0020] S1: Turn the electric grounding key switch on the fault switch panel in the driver's cab to the locked position to close the grounding switch, cut off the pantograph power supply circuit and the main circuit breaker circuit, and ensure that the electric grounding key switch is pulled out;

[0021] S2: Turn the three-way valve handle of the pantograph air circuit interlock box to the air circuit cut-off position to cut off the pantograph ventilation circuit and ensure that the air circuit key is pulled out;

[0022] S3: Unlock the locking device with the key and ensure that the keys of the converter box and power box are removed.

[0023] Furthermore, the S1 includes:

[0024] Rotate the first electric earthing key and the second electric earthing key to the locked position, so that the first earthing switch and the second earthing switch are both closed, and the power supply circuits of the first pantograph and the second pantograph are both disconnected, and the circuits of the first high-voltage circuit breaker and the second high-voltage circuit breaker are both disconnected;

[0025] Remove the first electric earthing key and the second electric earthing key.

[0026] Furthermore, the S2 includes:

[0027] Inserting the first electric earthing key and the second electric earthing key into the first electric earthing key lock cylinder and the second electric earthing key lock cylinder respectively;

[0028] Rotate the first three-way valve handle and the second three-way valve handle to the air circuit cutoff position to disconnect the ventilation circuits of the first pantograph and the second pantograph;

[0029] Pull out the first gas circuit key and the second gas circuit key.

[0030] Furthermore, the S3 includes:

[0031] Insert the first gas circuit key into the first gas circuit lock cylinder, insert the second gas circuit key into the second gas circuit lock cylinder, and remove the converter box key and the power box key.

[0032] In a third aspect, the present application also provides a rail vehicle, comprising the above-mentioned high-voltage interlocking device for rail vehicles.

[0033] Compared with the prior art, the high-voltage interlocking device for rail vehicles provided in this application locks the pantograph circuit through an electrical circuit, preventing the pantograph from receiving power during maintenance and simultaneously disconnecting the main circuit breaker circuit. By turning the three-way valve handle to the air circuit cutoff position, the pantograph's ventilation circuit is cut off, preventing the pantograph's air circuit from rising during maintenance. By dual-locking the pantograph's circuit and air circuit, and by configuring the electric grounding switch contacts, when the electric grounding switch is rotated to the locked position, the pantograph's raising circuit is disconnected, the train's high-voltage circuit main circuit breaker is disconnected, and the grounding switch is closed. This simplifies maintenance personnel's operations and improves the safety level of non-powered operations.

[0034] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0036] FIG1 shows a logical structure diagram of a high-voltage interlocking device for a rail vehicle provided by the present application;

[0037] FIG2 shows a structural diagram of a first bow-raising gas circuit interlock box provided by the present application;

[0038] FIG3 shows a gear structure diagram of a first electric earthing key lock cylinder provided by the present application;

[0039] FIG4 shows a structural diagram of a contact assembly provided by the present application;

[0040] FIG5 shows a contact logic function diagram provided by the present application;

[0041] FIG6 shows a schematic structural diagram of a power supply unit operating module of a high-voltage interlocking device for a rail vehicle provided in the present application.

[0042] Description of the drawings: 100-high-voltage interlocking device; 101-first cab fault switch panel; 102-second cab fault switch panel; 201-first bow lift gas circuit interlock box; 202-second bow lift gas circuit interlock box; 300-locking device; A1-first electric earthing key lock cylinder; a1-first electric earthing key; B1-first gas circuit lock cylinder; b1-first gas circuit key; T1-first three-way valve; t1-first three-way valve handle; A2-second electric earthing key lock cylinder; a2-second electric earthing key; B2-second gas circuit lock cylinder; b2-second gas circuit key; T2-second three-way valve; t2-second three-way valve handle; C-traction converter lock cylinder; D-power box lock cylinder; c-converter d-flow box key; d-power box key; K1-first electric earthing switch contact; K2-first emergency power-off loop relay; K3-second electric earthing switch contact; K4-second emergency power-off loop relay; G1-first earthing switch; G2-second earthing switch; E1-first main circuit breaker; E2-second main circuit breaker; F1-first pantograph; F2-second pantograph; O-open position; S-closed position; L-locked position; 103-contact assembly; 2011-first three-way valve status diagram; 2012-normally open and normally closed contact switches; x1-first air outlet; j1-first air inlet; p1-first exhaust; x2-second air outlet; j2-second air inlet; p2-second exhaust. DETAILED DESCRIPTION

[0043] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0044] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0045] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0046] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0047] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0048] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0049] The terms used herein are intended to describe various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form. The terms "include," "comprising," and "having" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0050] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] The following describes an embodiment of the present application with reference to FIG. 1 to FIG. 6 .

[0053] As shown in FIG1 , a high-voltage interlocking device 100 for rail vehicles of the present application is shown. The high voltage of the present application is a voltage level applicable to rail vehicles such as high-speed railways, subways, and trains. The device comprises a first cab fault switch panel 101, a second cab fault switch panel 102, a first bow-lift gas circuit interlock box 201, a second bow-lift gas circuit interlock box 202, and a locking device 300. The first cab fault switch panel 101 is interlocked with the first bow-lift gas circuit interlock box 201, and the second cab fault switch panel 102 is interlocked with the second bow-lift gas circuit interlock box 202. The first bow-lift gas circuit interlock box 201 and the second bow-lift gas circuit interlock box 202 jointly interlock the locking device 300, achieving a three-level key interlocking system. The interlocking system of this embodiment refers to the sequential, step-by-step locking of the three-level key interlocking system.

[0054] First, the first electric earthing key a1 on the first driver's cab fault switch panel 101 is turned to the locked position to unlock the first electric earthing key a1; the second electric earthing key a2 on the second driver's cab fault switch panel 102 is turned to the locked position to unlock the second electric earthing key a2; secondly, the first electric earthing key a1 is inserted into the first bow lift gas circuit interlock box 201, and the first three-way valve handle t1 on the first bow lift gas circuit interlock box 201 is rotated to the gas circuit stop position to unlock the first gas circuit key b1; the second electric earthing key a2 is inserted into the second bow lift gas circuit interlock box 202, and the second three-way valve handle t2 on the second bow lift gas circuit interlock box 202 is rotated to the gas circuit stop position to unlock the second gas circuit key b2; finally, the first gas circuit key b1 and the second gas circuit key b2 are simultaneously inserted into the locking device 300 and rotated to the maintenance position to unlock the converter box key c and the power box key d.

[0055] Specifically, this embodiment connects the key switch contacts to a three-stage interlocking circuit. The first electric grounding switch contact K1 and the second electric grounding switch contact K3 (not shown) are rotated to the locked position, allowing the first electric grounding key a1 and the second electric grounding key a2 to be removed. The moment the electric grounding key switches are locked, the bow lift circuit and the main circuit breaker circuit are disconnected; after a time delay, the grounding switches G1 and G2 close. Preferably, the number of switch contacts of the first electric grounding key a1 and the second electric grounding key a2 can be designed to meet actual project requirements.

[0056] This application uses the first-level key on the first-level driver's cab fault switch panel to disconnect and lock the first-level high-voltage circuit and close the grounding switch; the second-level key and the three-way valve handle are used on the pantograph air circuit interlock box to cut off the pantograph's ventilation circuit and lock the air circuit; the third-level key is used to lock the locking device to achieve safe maintenance; the three-level key locking order of this embodiment cannot be changed.

[0057] The first driver's cab fault switch panel 101 of the present application is used to control the on and off of the first pantograph power supply circuit, the first high-voltage circuit breaker circuit and the first grounding switch circuit; the second driver's cab fault switch panel 102 is used to control the on and off of the second pantograph power supply circuit, the second high-voltage circuit breaker circuit and the second grounding switch circuit; the first bow lift air circuit interlock box 201 and the second bow lift air circuit interlock box 202 are respectively used to control the on and off of the ventilation circuits of the first pantograph F1 and the second pantograph F2 of the rail vehicle; the locking device 300 is used to control the opening and closing of the traction inverter box, auxiliary inverter box and power supply box of the rail vehicle.

[0058] The first bow lift air circuit interlock box 201 and the second bow lift air circuit interlock box 202 of the present application are located in the pantograph compartment of the vehicle. The specific pantograph compartment is set according to actual production use. As long as there is accommodation space, the first bow lift air circuit interlock box 201 and the second bow lift air circuit interlock box 202 can be set.

[0059] The first bow-lift gas circuit interlock box 201 of the present application is equipped with a first electric grounding key lock cylinder A1, a first gas circuit lock cylinder B1, a first gas circuit key b1, a first three-way valve T1, and a first three-way valve handle t1; the second bow-lift gas circuit interlock box 202 is equipped with a second electric grounding key lock cylinder A2, a second gas circuit lock cylinder B2, a second gas circuit key b2, a second three-way valve T2, and a second three-way valve handle t2. The first gas circuit key b1 corresponds to the first gas circuit lock cylinder B1, and the second gas circuit key b2 corresponds to the second gas circuit lock cylinder B2.

[0060] The first three-way valve handle t1 corresponds to controlling the first three-way valve T1, as shown in the first three-way valve state diagram 2011 in the first pantograph air path interlock box 201 in Figure 2, having a first air outlet end x1, a first air inlet end j1 and a first exhaust end p1, the first air outlet end x1 is connected to the first pantograph, the first air inlet end j1 is connected to the first air inlet path, the first exhaust end p1 is connected to the first exhaust path, and the first three-way valve T1 is respectively connected to the first air inlet end j1, the first air outlet end x1 and the first exhaust end p1 of the vehicle; the second three-way valve handle t2 corresponds to controlling the second three-way valve T2, also having an air outlet end x2, an air inlet end j2 and an exhaust end p2, the air outlet end x2 is connected to the second pantograph, the air inlet end j2 is connected to the second air inlet path, the exhaust end p2 is connected to the second exhaust path, and the second three-way valve T2 is respectively connected to the second air inlet end j2, the second air outlet end x2 and the second exhaust end p2 of the vehicle. Insert the first electric earthing key a1 into the first electric earthing key lock cylinder A1, operate the first three-way valve handle t1 to switch to the air circuit cut-off position, and then you can take out the first air circuit key b1; the situation of the second three-way valve T2 is the same as the first three-way valve T1. Insert the second electric earthing key a2 into the second electric earthing key lock cylinder A2, operate the second three-way valve handle t2 to switch to the air circuit cut-off position, and then you can take out the second air circuit key b2.

[0061] In addition, the first bow lift air circuit interlock box 201 also has a first auxiliary switch, a first interlock mechanism, a first connector, and is also equipped with two pairs of normally open and normally closed contact switches 2012. The first auxiliary switch, the first interlock mechanism, the first connector, the two pairs of normally open and the two pairs of normally closed contacts are provided to feed back the status of the bow lift air circuit to the vehicle network, and have no substantial effect on the key of the electric grounding switch.

[0062] The locking device 300 of the present application is equipped with a first air circuit lock cylinder B1, a second air circuit lock cylinder B2, several converter box lock cylinders C, several converter box keys C, several power box lock cylinders D, and several power box keys d. The converter box lock cylinders C correspond to the traction converter high-voltage box door and the auxiliary converter high-voltage box door, respectively. The converter box key C corresponds to the traction converter box door lock cylinder C, and the power box key d corresponds to the power box door lock cylinder D. In the embodiment of the present application, there are six converter box lock cylinders C and six converter box keys C. Preferably, there are four traction converter lock cylinders C and four keys C, and two auxiliary converter lock cylinders and two keys. There are also two power box lock cylinders D and two power box keys d. In other embodiments, there may be eight (tentative) C lock cylinders for the traction converter, four (tentative) C lock cylinders for the auxiliary converter, and one D lock cylinder for each external power box. However, in actual applications, the number of the converter box lock core C, the converter box key c, the power box lock core D, and the power box key d can be adaptively increased or decreased.

[0063] Insert the first gas circuit key b1 and the second gas circuit key b2 into the first gas circuit lock core B1 and the second gas circuit lock core B2 on the locking device 300 at the same time and rotate them to the locked position, then pull out the corresponding converter box key c and power box key d for maintenance to achieve locking; after that, the corresponding equipment compartment door can be opened. Reliable protective covers are provided at the lock cores of the equipment compartment under the vehicle to play a sealing role and are easy to operate.

[0064] The first electric earthing switch contacts K1 are respectively connected to the closed circuit of the first earthing switch G1, the power supply circuit of the first pantograph F1 and the closed circuit of the first main circuit breaker E1; the contacts of the second electric earthing key a2 are respectively connected to the closed circuit of the second earthing switch G2, the power supply circuit of the second pantograph F2 and the closed circuit of the second main circuit breaker E2.

[0065] Specifically, as shown in Figure 2, the first electric earthing switch contact K1 is connected to the closed circuit of the first earthing switch G1, and at the same time is connected to the circuit of the first emergency power-off loop relay K2. The circuit of the first emergency power-off loop relay K2 includes the circuit of the first main circuit breaker E1 and the circuit of the first pantograph F1; similarly, the second electric earthing switch contact K3 is connected to the closed circuit of the second earthing switch G2, and at the same time is connected to the circuit of the second emergency power-off loop relay K4. The circuit of the second emergency power-off loop relay K4 includes the circuit of the second main circuit breaker E2 and the circuit of the second pantograph F2. By rotating the first electric earthing switch contact K1 to the closed position, the first earthing switch G1 is closed and grounded safely; then the first emergency power-off loop relay K2 is turned to the open position, so that the circuit of the first main circuit breaker E1 and the circuit of the first pantograph F1 are de-energized, and the first pantograph F1 is de-energized and lowered; in the same way, by rotating the second electric earthing switch contact K3 to the closed position, the second earthing switch G2 is closed and grounded safely; then the second emergency power-off loop relay K4 is turned to the open position, so that the circuit of the second main circuit breaker E2 and the circuit of the second pantograph F2 are de-energized, and the second pantograph F2 is de-energized and lowered; in this way, maintenance technicians can perform safe operations in a safe, power-free environment.

[0066] The position structure of the first electric grounding key lock cylinder A1 of the present application is shown in Figure 3. The electric grounding key lock cylinder has open, close, and locked positions, with the close position S located between the open position O and the locked position L. At the center of the lock cylinder is a keyhole H for inserting the electric grounding key, which is the closed position. There is also a rotation position H1 for the open position O and a rotation position H2 for the locked position L. After the first electric grounding key A1 is inserted into the keyhole H in the center of the lock cylinder, it can be rotated left to open position O and right to lock position L. The first electric grounding key lock cylinder A1 is connected to a contact assembly 103 that provides feedback on the open, close, and lock signals. Contact assembly 103 is shown in Figure 4. The open position O is the normal position signal, the locked position L is the maintenance position signal, and the closed position S is the signal switching position, which switches the normal position signal to the maintenance position signal; when the first electric grounding key a1 is in the open position O, the unit works normally; when the first electric grounding key a1 is in the closed position S, the unit is shut down; when the first electric grounding key a1 is in the locked position L, the unit needs to be repaired; based on the above design, only when it is switched to the locked position L, the first electric grounding key a1 can be pulled out for the subsequent linkage of the first bow lift air circuit interlock box 201 and the locking device 300, otherwise the first bow lift air circuit interlock box 201 and the locking device 300 cannot be switched or used normally.

[0067] As shown in FIG4 , in the embodiment of the present application, the contact assembly 103 has a total of 10 groups of contacts, which are divided into two types of contacts: normally open contacts and two pairs of normally open and normally closed contacts. Among them, 2 (1), 4 (3), 18 (17), and 20 (19) are normally open contacts, and 6 (5) and 8 (7), 10 (9) and 12 (11), and 14 (13) and 16 (15) form two pairs of normally open and normally closed contacts. The logical functions of the 10 groups of contacts are shown in FIG5 , which have an open state, a closed state, and a locked state. In other embodiments, the specific number of contacts can be increased or decreased according to the actual project requirements.

[0068] The gear structure and contact arrangement of the second electric earthing key lock cylinder A2 are the same as those of the first electric earthing key lock cylinder A1.

[0069] In the present application, the first electric earthing key a1, the second electric earthing key a2, the first gas circuit key b1, the second gas circuit key b2, the inverter box key c, and the power box key d are set to different colors, and the first electric earthing key a1 and the second electric earthing key a2 are the same color, which is blue in this embodiment; in other embodiments, they can also be set to colors other than blue. The first gas circuit key b1 and the second gas circuit key b2 are the same color, which is yellow in this embodiment; in other embodiments, they can also be set to colors other than yellow. Several of the inverter box keys c are the same color, which is green in this embodiment, and can also be set to colors other than green in other embodiments. Several of the power box keys d are the same color, which is black in this embodiment, and can also be set to colors other than black in other embodiments.

[0070] This application transforms the existing electric earthing switch into a mature product for use in existing EMUs, and adapts the wiring method; adds a bow-lifting air circuit interlock box, which is installed in the air circuit at the front end of the bow-lifting valve plate, installs the bow-lifting air circuit interlock box, and adapts the air duct; adds a locking device 300, which is installed in the electrical cabinet of the train set where no equipment is installed; also renovates the box doors of the traction, auxiliary converter, and external power supply box that have been installed, and installs the converter box C lock cylinder and the power box D lock cylinder.

[0071] This application utilizes the configuration of the electric earthing switch contacts to achieve the following simultaneous actions when the electric earthing switch is rotated to the locked position: the pantograph raising circuit is disconnected, the main circuit breaker of the train high-voltage circuit is disconnected, and the earthing switch is closed. This dual locking of the pantograph circuit and the air circuit prevents the pantograph from being energized and the main circuit breaker from closing during maintenance. This prevents the pantograph air circuit from rising during maintenance, simplifies maintenance operations, and improves operational safety.

[0072] The present application also provides a high-voltage interlocking method for a rail vehicle, which is applied to the high-voltage interlocking device 100 of the rail vehicle mentioned above, and specifically includes the following steps:

[0073] Step S1: Disconnect the pantograph power supply circuit and the vehicle high-voltage circuit through the fault switch panel in the driver's cab, closing the grounding switch. Specifically, rotate the first electric grounding key a1 and the second electric grounding key a2 to the locked position, closing the first grounding switch solenoid valve G1 and the second grounding switch solenoid valve G2. This disconnects the power supply circuits of the first pantograph F1 and the second pantograph F2, and simultaneously disconnects the first high-voltage circuit breaker E1 and the second high-voltage circuit breaker E2. Remove the first electric grounding key a1 and the second electric grounding key a2.

[0074] Step S2: Disconnect the pantograph ventilation circuit via the pantograph air circuit interlock box. The specific operations are as follows: insert the first electric grounding key a1 and the second electric grounding key a2 into the first electric grounding key lock cylinder A1 and the second electric grounding key lock cylinder A2, respectively; rotate the first three-way valve handle t1 and the second three-way valve handle t2 to the air circuit cutoff position to disconnect the ventilation circuits of the first pantograph F1 and the second pantograph F2; and remove the first air circuit key b1 and the second air circuit key b2.

[0075] Step S3: Unlock the converter box and power box using the key of the locking device 300. The specific operation is: insert the first gas circuit key b1 and the second gas circuit key b2 into the first gas circuit lock cylinder B1 and the second gas circuit lock cylinder B2 respectively, and remove the converter box key c and the power box key d.

[0076] The method of this embodiment is highly applicable to high-voltage interlocking devices, can ensure the normalization and standardization of high-voltage interlocking system operations, and ensure the personal safety of operators during train maintenance.

[0077] The present application also provides a rail vehicle, comprising the high-voltage interlocking device 100 for a rail vehicle described above.

[0078] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A high-voltage interlock device for rail vehicles, characterized in that, Including: The first driver's cab fault switch panel, the second driver's cab fault switch panel, the first pantograph lifting air circuit interlock box, the second pantograph lifting air circuit interlock box, and the locking device; Among them, the first driver's cab fault switch panel is interlocked with the first pantograph lifting air circuit interlock box, the second driver's cab fault switch panel is interlocked with the second pantograph lifting air circuit interlock box, and the first pantograph lifting air circuit interlock box and the second pantograph lifting air circuit interlock box jointly interlock the locking device; Turn the first electric earthing key on the first driver's cab fault switch panel to the locked position to unlock the first electric earthing key; turn the second electric earthing key on the second driver's cab fault switch panel to the locked position to unlock the second electric earthing key; Insert the first electric earthing key into the first pantograph lifting air circuit interlock box, and rotate the first three-way valve handle on the first pantograph lifting air circuit interlock box to the air circuit cut-off position to unlock the first air circuit key; insert the second electric earthing key into the second pantograph lifting air circuit interlock box, and rotate the second three-way valve handle on the second pantograph lifting air circuit interlock box to the air circuit cut-off position to unlock the second air circuit key; Insert the first air circuit key and the second air circuit key into the locking device at the same time and rotate to the maintenance position to unlock the converter box key and the power supply box key.

2. The high-voltage interlock device for rail vehicles according to claim 1, characterized in that, A first electric earthing key lock core is provided on the first pantograph lifting air circuit interlock box, and the first electric earthing key corresponds to the first electric earthing key lock core; a second electric earthing key lock core is provided on the second pantograph lifting air circuit interlock box, and the second electric earthing key corresponds to the second electric earthing key lock core; A first air circuit lock core is provided on the first pantograph lifting air circuit interlock box, and the first air circuit key corresponds to the first air circuit lock core; a second air circuit lock core is provided on the second pantograph lifting air circuit interlock box, and the second air circuit key corresponds to the second air circuit lock core; A first three-way valve corresponding to the first three-way valve handle is provided on the first pantograph lifting air circuit interlock box, and a second three-way valve corresponding to the second three-way valve handle is provided on the second pantograph lifting air circuit interlock box.

3. The high-voltage interlock device for a rail vehicle according to claim 2, characterized in that, A first air circuit lock core, a second air circuit lock core, a plurality of converter box lock cores, a plurality of converter box keys corresponding to the plurality of converter box lock cores, a plurality of power supply box lock cores, and a plurality of power supply box keys corresponding to the plurality of power supply box locks are provided on the locking device.

4. The high-voltage interlock device for a rail vehicle according to claim 2, characterized in that, The contacts of the first electric earthing key are respectively connected to the closing circuit of the first earthing switch, the power supply circuit of the first pantograph, and the closing circuit of the first high-voltage circuit breaker; the contacts of the second electric earthing key are respectively connected to the closing circuit of the second earthing switch, the power supply circuit of the second pantograph, and the closing circuit of the second high-voltage circuit breaker.

5. The high-voltage interlock device for rail vehicles according to claim 3, characterized in that, The first electric earthing key, the second electric earthing key, the first air circuit key, the second air circuit key, the converter box key, and the power supply box key are set to different colors, and the colors of the first electric earthing key and the second electric earthing key are the same, the colors of the first air circuit key and the second air circuit key are the same, the colors of the plurality of converter box keys are the same, and the colors of the plurality of power supply box keys are the same.

6. A high-voltage interlock method for a rail vehicle, applied to the high-voltage interlock device of the rail vehicle as described in any one of claims 1-5, characterized in that, Including the following steps: S1: Turn the electric earthing key switch on the cab fault switch panel to the locked position to close the earthing switch, cut off the power supply circuits of the pantographs and the main circuit breaker circuits, and ensure that the electric earthing key switch is pulled out. S2: Turn the three-way valve handle of the pantograph air circuit interlock box to the air circuit cut-off position to cut off the air supply circuit of the pantographs and ensure that the air circuit key is pulled out. S3: Unlock with the key of the locking device and ensure that the keys of the converter box and the power supply box are pulled out.

7. A high-voltage interlock method for a rail vehicle according to claim 6, characterized in that, The S1 includes: Rotate the first electric earthing key and the second electric earthing key to the locked position so that the first earthing switch and the second earthing switch are both closed, and the power supply circuits of the first pantograph and the second pantograph are both disconnected, and at the same time, the first high-voltage circuit breaker and the second high-voltage circuit breaker circuits are both disconnected. Pull out the first electric earthing key and the second electric earthing key.

8. A high-voltage interlocking method for rail vehicles according to claim 7, characterized in that The S2 includes: Insert the first electric earthing key and the second electric earthing key into the first electric earthing key lock core and the second electric earthing key lock core respectively. Rotate the first three-way valve handle and the second three-way valve handle to the air circuit cut-off position to disconnect the air supply circuits of the first pantograph and the second pantograph. Pull out the first air circuit key and the second air circuit key.

9. A high-voltage interlock method for a rail vehicle according to claim 8, characterized in that, The S3 includes: Insert the first air circuit key into the first air circuit lock core, and at the same time insert the second air circuit key into the second air circuit lock core, and pull out the keys of the converter box and the power supply box.

10. An orbital vehicle, characterized in that, It includes a high-voltage interlock device for rail vehicles according to any one of claims 1-5.

Images