CN112172617A - Control circuit and rail vehicle - Google Patents
Control circuit and rail vehicle Download PDFInfo
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- CN112172617A CN112172617A CN202011095847.4A CN202011095847A CN112172617A CN 112172617 A CN112172617 A CN 112172617A CN 202011095847 A CN202011095847 A CN 202011095847A CN 112172617 A CN112172617 A CN 112172617A
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- valve
- grounding
- pantograph
- protection
- protective
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M5/00—Arrangements along running rails or at joints thereof for current conduction or insulation, e.g. safety devices for reducing earth currents
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The application discloses control circuit and rail vehicle includes: the protection grounding power-off electromagnetic valve, the protection grounding on-off electromagnetic valve, the first controller and the second controller; the first controller and the second controller are respectively connected in series with a branch where the protective grounding disconnection electromagnetic valve and the protective grounding connection electromagnetic valve are located; when the first normally closed contact is connected with the second normally closed contact, the protection grounding power-off electromagnetic valve is electrified; when the first normally open contact is connected with the second normally open contact, the grounding electromagnetic valve is protected from power failure; because the protection grounding power-off solenoid valve is always electrified, air is supplied to the protection grounding power-off cylinder all the time, and even if the protection grounding power-off solenoid valve supplies air to the protection grounding power-on cylinder, the protection grounding switch can not be closed. The protection earthing switch includes: a first auxiliary contact; when the first auxiliary contact is closed, the pantograph lifting electromagnetic valve is powered off, and the pantograph cannot lift, namely, an instruction of lifting the pantograph is cut off, so that the condition of protecting the grounding switch from being closed is met, and further potential safety hazards cannot be generated.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a control circuit and a rail vehicle.
Background
At present, a power supply system of a railway vehicle is called as a traction power supply system, the system obtains a voltage of 220kv from a local power grid, the voltage is changed into 27.5kv after being introduced into a traction substation, and the voltage is supplied to a contact net, the railway vehicle is contacted with the contact net through a pantograph on the roof to obtain power, and the power is supplied to various devices on a train after being reduced.
When an abnormal situation occurs while the rail vehicle is running, for example: the grid voltage of the catenary connected to the rail vehicle is abnormal, but the main circuit breaker VCB cannot cut off the current of the main circuit due to a fault. At this time, the protection grounding switch is closed to forcibly ground the catenary and allow the main circuit current to flow into the ground, so as to ensure the safety of the railway vehicle.
However, when the rail vehicle normally runs, the protection grounding switch is abnormally closed (for example, misoperation), and then the contact net is directly short-circuited with the ground, so that potential safety hazards are easily caused.
Disclosure of Invention
In order to solve the technical problem, the application provides a control circuit and a rail vehicle, and the risk of causing potential safety hazards can be reduced when a protection grounding switch is normally closed.
The embodiment of the application discloses the following technical scheme:
in a first aspect, the present application provides a control circuit for controlling a protective grounding switch, the control circuit comprising: the protection grounding power-off electromagnetic valve, the protection grounding on-off electromagnetic valve, the first controller and the second controller;
the first controller comprises a first normally closed contact and a first normally open contact; the second controller comprises a second normally closed contact and a second normally open contact;
the first controller and the second controller are respectively connected in series with the protective grounding power-off electromagnetic valve and the branch where the protective grounding power-on electromagnetic valve is located; when the first normally-closed contact is connected with the second normally-closed contact, the protection grounding power-off electromagnetic valve is electrified; when the first normally open contact is connected with the second normally open contact, the protective grounding solenoid valve is powered off;
the protection earthing switch includes: a first auxiliary contact;
when the protection grounding switch is normally closed in an abnormal state, the first auxiliary contact is closed, so that the pantograph lifting electromagnetic valve is de-energized.
Optionally, the protection ground fault solenoid valve includes a main protection ground fault solenoid valve and a backup protection ground fault solenoid valve; the protective grounding solenoid valve comprises a main protective grounding solenoid valve and a backup protective grounding solenoid valve;
when the main protection grounding power-off magnetic valve is abnormal, starting the backup protection grounding power-off magnetic valve; and when the main protection grounding electromagnetic valve is abnormal, starting the backup protection grounding electromagnetic valve.
Optionally, the first auxiliary contact is used for being connected in series with a coil of a first protection earthing switch state relay;
the normally closed contact of the first protective grounding switch state relay is connected with the coil of the pantograph rising relay in series;
and a first normally open contact of the pantograph lifting relay is connected with the pantograph lifting electromagnetic valve in series.
Optionally, a second normally open contact of the pantograph-ascending relay is connected in series with the main breaker solenoid valve.
Optionally, the protection ground switch further includes: a second auxiliary contact;
when the protection grounding switch is normally closed in an abnormal mode, the second auxiliary contact is closed, so that the normally open contact of the emergency power-off relay is opened;
and a normally open contact of the emergency power-off relay is connected in series with the pantograph-ascending electromagnetic valve.
Optionally, the auxiliary normally open contact of the emergency power-off relay is connected in series with the main breaker solenoid valve.
Optionally, the second auxiliary contact is connected in series with a coil of a second protective earthing switch state relay;
and the normally closed contact of the second protective grounding switch state relay is connected with the coil of the emergency power-off relay in series.
Optionally, a coil of the second protection earthing switch state relay is connected in series with a normally open contact of the pantograph lifting gas circuit valve;
before the protective grounding switch is closed, a normally open contact of the pantograph lifting gas circuit valve is closed, so that a coil of the second protective grounding switch state relay is electrified.
Optionally, when the normally closed contact of the pantograph lifting gas circuit valve is closed, the pantograph lifting gas circuit valve is cut off; when the pantograph lifting gas circuit valve and the protective grounding gas circuit breaking valve are both cut off, the protective grounding gas circuit closing valve is allowed to be controlled;
and when the protective grounding gas-mixing path valve is conducted, the high-voltage equipment box is allowed to be opened.
In a second aspect, the present application provides a rail vehicle comprising any one of the optional control circuits described above in the first aspect; the rail vehicle further includes: a pantograph;
and the control circuit is used for controlling the pantograph to rise or fall.
Optionally, the rail vehicle further includes: a pneumatic line;
the pneumatic line includes: a protective grounding gas-mixing path valve;
and the protective grounding gas-closing path valve is used for cutting off the protective grounding gas-closing path when the railway vehicle is in a normal working condition.
Optionally, the pneumatic circuit further includes: a pantograph lifting gas circuit valve and a protective grounding gas circuit breaking valve;
before the protective grounding switch is closed, the pantograph lifting air circuit valve is cut off; the protective grounding gas-break circuit valve is cut off; and conducting the protective grounding gas-mixing path valve.
According to the technical scheme, the method has the following advantages:
the application provides a control circuit and rail vehicle, control circuit is used for controlling protection earthing switch, control circuit includes: the protection grounding power-off electromagnetic valve, the protection grounding on-off electromagnetic valve, the first controller and the second controller; the first controller comprises a first normally closed contact and a first normally open contact; the second controller comprises a second normally closed contact and a second normally open contact; the first controller and the second controller are respectively connected in series with the protective grounding power-off electromagnetic valve and the branch where the protective grounding power-on electromagnetic valve is located; when the first normally-closed contact is connected with the second normally-closed contact, the protection grounding power-off electromagnetic valve is electrified; when the first normally open contact is connected with the second normally open contact, the protective grounding solenoid valve is powered off; the protection earthing switch includes: a first auxiliary contact; when the first controller and the second controller are in misoperation, the first normally closed contact and the second normally closed contact are both closed, the first normally open contact and the second normally open contact are both disconnected, the protection grounding power-off electromagnetic valve is electrified, the protection grounding power-on electromagnetic valve is electrified, compressed air is provided for the protection grounding power-off cylinder, the protection grounding power-on cylinder releases compressed air, and the protection grounding switch is in a disconnected state; because the protection grounding power-off solenoid valve is always electrified, air is supplied to the protection grounding power-off cylinder all the time, and even if the protection grounding power-off solenoid valve supplies air to the protection grounding power-on cylinder, the protection grounding switch can not be closed. Further, when the first auxiliary contact is closed, the pantograph lifting electromagnetic valve is powered off, and the pantograph cannot lift, namely, a pantograph lifting instruction is cut off, so that potential safety hazards cannot be generated.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a control circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another control circuit provided in an embodiment of the present application;
fig. 3 is a circuit diagram of an interlocking control provided in an embodiment of the present application;
fig. 4 is a circuit diagram of another interlocking control provided in the embodiment of the present application;
fig. 5 is a circuit diagram of still another interlock control provided in an embodiment of the present application;
fig. 6 is a circuit diagram of another interlocking control provided by an embodiment of the present application;
fig. 7 is a circuit diagram of still another interlock control provided in an embodiment of the present application;
fig. 8 is a circuit diagram of still another interlock control provided in an embodiment of the present application;
fig. 9 is a circuit diagram of another interlocking control provided by an embodiment of the present application;
fig. 10 is a circuit diagram of still another interlock control provided in an embodiment of the present application;
FIG. 11 is a schematic view of an interlock between a key and a key box according to an embodiment of the present application;
fig. 12 is a schematic diagram of an air passage according to an embodiment of the present disclosure.
Detailed Description
When the rail vehicle normally runs, the pantograph is in a pantograph lifting state, if the protection grounding switch is closed due to misoperation at the moment, the contact net is in short circuit with the ground, and potential safety hazards are easily caused.
In order to solve the above problem, the present application provides a control circuit including: the protection grounding power-off electromagnetic valve, the protection grounding on-off electromagnetic valve, the first controller and the second controller; the first controller comprises a first normally closed contact and a first normally open contact; the second controller comprises a second normally closed contact and a second normally open contact; when the rail vehicle runs normally, the first normally closed contact is connected with the second normally closed contact, the protection grounding power-off electromagnetic valve is electrified, the first normally open contact is connected with the second normally open contact, and the protection grounding power-off electromagnetic valve is electrified, so that the protection grounding switch is in a disconnected state; when the protection earthing switch is normally closed in an abnormal state, the first auxiliary contact of the protection earthing switch is closed, so that the pantograph lifting electromagnetic valve is powered off, the pantograph cannot lift, the pantograph is in a pantograph lowering state, the condition that the protection earthing switch is closed is met, and potential safety hazards cannot be generated.
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiments of the present application provide a control circuit, which is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present application provides a schematic diagram of a control circuit.
The control circuit is used for controlling a protective grounding switch and comprises a protective grounding disconnection electromagnetic valve EGOV, a protective grounding connection electromagnetic valve EGCV, a first controller K1 and a second controller K2.
The first controller K1 comprises a first normally closed contact K1-1 and a first normally open contact K1-2; the second controller K2 includes a second normally closed contact K2-1 and a second normally open contact K2-2.
The first controller K1 and the second controller K2 are respectively connected in series with a branch where the protective grounding electromagnetic valve EGOV and the protective grounding electromagnetic valve are located. Namely, the first normally closed contact K1-1, the second normally closed contact K2-1 and the protection grounding electromagnetic valve EGOV are connected in series, and the first normally open contact K1-2, the second normally open contact K2-2 and the protection grounding electromagnetic valve EGCV are connected in series.
When the protection grounding power-off electromagnetic valve EGOV is electrified and the protection grounding power-on electromagnetic valve EGCV is deenergized, the compression control in the protection grounding power-on cylinder is eliminated, meanwhile, the compression control is provided for the protection grounding power-off cylinder, and the protection grounding switch is in a disconnected state; when the rail vehicle runs normally, the protection grounding power-off electromagnetic valve EGOV is set to be normally electrified, and then the protection grounding switch is in a disconnected state.
Since the protection grounding breaking solenoid valve EGOV is always electrified, compressed air is always supplied into the protection grounding breaking cylinder. And to close the protective grounding switch, compressed air in the protective grounding breaking cylinder needs to be removed. At this time, compressed air is always supplied into the protective grounding break cylinder, so that the protective grounding close electromagnetic valve EGCV is electrified even if misoperation occurs, the compressed air is supplied into the protective grounding close cylinder, and the protective grounding cannot be closed. Therefore, the hidden danger caused by the fact that the protective grounding solenoid valve is electrified due to misoperation can be avoided.
As a possible implementation, the protection ground-fault solenoid valve EGOV includes a main protection ground-fault solenoid valve and a backup protection ground-fault solenoid valve that are backup to each other; the protective grounding solenoid valve EGCV comprises a main protective grounding solenoid valve and a backup protective grounding solenoid valve which are mutually backup.
As shown in fig. 2, the embodiment of the present application provides a schematic diagram of another control circuit. The figure shows the primary backup configuration of a protective earth deenergized solenoid valve EGOV and a protective earth make solenoid valve EGCV. In some scenarios, first controller K1 and second controller K2 are located at the head car of the rail vehicle, main protection ground disconnect solenoid valve EGOV1 and main protection ground engage solenoid valve EGCV1 are located at 3 cars, and backup protection ground disconnect solenoid valve EGOV2 and backup protection ground engage solenoid valve EGCV2 are located at 6 cars. When the main protection grounding power-off magnetic valve is abnormal, starting the backup protection grounding power-off magnetic valve; and when the main protection grounding electromagnetic valve is abnormal, starting the backup protection grounding electromagnetic valve.
Further, even if the protection grounding switch is abnormally closed, the embodiment of the application does not cause potential safety hazard, and the following detailed description is provided.
As shown in fig. 3, an embodiment of the present application provides a circuit diagram of interlocking control. The protective earthing switch comprises an auxiliary contact S-T connected in series with the coil EGSR1-1 of the first protective earthing switch state relay. As shown in fig. 4, the embodiment of the present application provides a circuit diagram of yet another interlock control. Continuing with FIG. 3, the normally closed contact EGSR1-2 of the first protective earthing switch state relay is connected in series with the coil J1-1 of the pantograph rising relay, and the normally open contact J1-2 of the pantograph rising relay is connected in series with the pantograph rising solenoid valve 401.
When the protection earthing switch is closed, the first auxiliary contact S-T is closed, the coil EGSR1-1 of the first protection earthing switch state relay is electrified, referring to fig. 4, after the coil EGSR1-1 of the first protection earthing switch state relay is electrified, the normally closed contact EGSR1-2 of the first protection earthing switch state relay is disconnected, the coil J1-1 of the pantograph rising relay is electrified, the first normally open contact J1-2 of the pantograph rising relay is disconnected, the pantograph rising electromagnetic valve 401 is electrified, the pantograph cannot rise, namely the pantograph is in a pantograph falling state, when the pantograph is in the pantograph falling state, the condition of closing the protection earthing switch is met, and even if the protection earthing switch is closed, potential safety hazards cannot be caused.
In this embodiment, when the protection earthing switch is normally closed differently, the protection earthing switch and the pantograph are interlocked, so that when the protection earthing switch is closed, the connection between the pantograph and the contact network is immediately cut off, the pantograph is in a pantograph lowering state, the condition that the protection earthing switch is closed is met, and the risk of causing potential safety hazards is reduced.
When the pantograph is in the pantograph lowering state, the main circuit breaker should be in the off state. The control circuit that this application embodiment provided, after the control pantograph falls the bow again, also can control main circuit breaker simultaneously and be in the off-state.
As shown in fig. 5, the embodiment of the present application provides a circuit diagram of yet another interlock control. The second normally open contact J1-3 of the pantograph lifting relay is connected in series with the main breaker solenoid valve VCB. When the coil J1-1 of the pantograph lifting relay loses power, the second normally open contact J1-3 of the pantograph lifting relay is disconnected, the electromagnetic valve VCB of the main circuit breaker loses power, and the main circuit breaker is disconnected after the electromagnetic valve VCB of the main circuit breaker loses power. Therefore, the main circuit breaker can be controlled to be switched off after the pantograph is lowered; furthermore, due to the fact that the electromagnetic valve VCB of the main circuit breaker loses power, the main circuit breaker is not closed before the pantograph rises due to other abnormal operations, and safety of the railway vehicle is improved.
As shown in fig. 6, the embodiment of the present application provides a circuit diagram of another interlocking control. The protective earthing switch further comprises a second auxiliary contact Z-R, which is connected in series with the coil EGSR2-1 of the second protective earthing switch state relay; when the protection grounding switch is normally closed in an abnormal mode, the second auxiliary contact Z-R is closed, and then the normally open contact of the emergency power-off relay is disconnected. As shown in fig. 7, the embodiment of the present application provides a circuit diagram of yet another interlock control. Continuing with FIG. 6, the normally closed contact EGSR2-2 of the second protective grounding switch state relay is connected in series with coil J2-1 of the emergency disconnect relay. As shown in fig. 8, the embodiment of the present application provides a circuit diagram of yet another interlock control. FIG. 8 is a view based on FIG. 4 and further provided with a normally open contact J2-2 of an emergency power off relay, which is connected in series with the pantograph rising solenoid valve 401, and a normally open contact J2-2 of the emergency power off relay.
When the protection grounding switch is normally closed in an abnormal mode, the second auxiliary contact Z-R is closed, the coil EGSR2-1 of the second protection grounding switch state relay is electrified, the normally closed contact EGSR2-2 of the second protection grounding switch state relay is disconnected, the coil J2-1 of the emergency power-off relay is electrified, the normally open contact J2-2 of the emergency power-off relay is disconnected, and the pantograph lifting electromagnetic valve 401 is powered off. Through the interlocking control of the second protection earthing switch state relay, the pantograph lifting electromagnetic valve can be powered off when the protection earthing switch is normally closed abnormally, and then the pantograph is in a pantograph lowering state, so that the risk of causing potential safety hazards is reduced.
As shown in fig. 9, the embodiment of the present application provides a circuit diagram of another interlocking control. Fig. 9 is based on fig. 5, and further includes an auxiliary normally open contact J2-3 of the emergency power-off relay, the auxiliary normally open contact J2-3 of the emergency power-off relay is connected in series with the main circuit breaker electromagnetic valve VCB, when the coil J2-1 of the emergency power-off relay loses power, the auxiliary normally open contact J2-3 of the emergency power-off relay is opened, the main circuit breaker electromagnetic valve VCB loses power, and the main circuit breaker cannot be closed, so that after pantograph lowering can be realized, the main circuit breaker is controlled to be opened at the same time; furthermore, due to the fact that the electromagnetic valve VCB of the main circuit breaker loses power, the main circuit breaker is not closed before the pantograph rises due to other abnormal operations, and safety of the railway vehicle is improved.
When the high-voltage equipment of the railway vehicle needs to be maintained, the coil EGSR2-1 of the second protective earthing switch state relay needs to be powered on by closing the normally open contact PanUCK of the pantograph lifting gas circuit valve, so that the pantograph of the railway vehicle cannot lift the pantograph, and meanwhile, preparation is made for taking out a key of a high-voltage equipment box, which is described in detail below.
As shown in fig. 10, the embodiment of the present application provides a circuit diagram of yet another interlock control. Fig. 10 is a diagram of fig. 6, further including a normally open contact PanUCK of the pantograph lifting gas circuit valve, where the normally open contact PanUCK of the pantograph lifting gas circuit valve is connected in series with a coil EGSR2-1 of the second protection earthing switch state relay, and when the normally open contact PanUCK of the pantograph lifting gas circuit valve is closed, the coil EGSR2-1 of the second protection earthing switch state relay is powered on, so that the pantograph lifting operation of the railway vehicle cannot be performed.
As shown in fig. 11, the embodiment of the present application provides a schematic view of the interlocking between the key and the key box. When the normally closed contact of the pantograph lifting gas circuit valve is closed, the pantograph lifting gas circuit valve is cut off; when the pantograph lifting gas circuit valve and the protective grounding gas circuit breaking valve are both cut off, the protective grounding gas circuit closing valve is allowed to be controlled; and when the protective grounding gas-mixing path valve is conducted, the high-voltage equipment box is allowed to be opened. In some scenarios, when the staff needs to maintain the high-voltage equipment of the railway vehicle, the high-voltage interlocking key box 1101 needs to be opened, and after the normally open contact PanUCK of the pantograph ascending air circuit valve is manually closed, the pantograph ascending air circuit valve is cut off, and meanwhile, the protective grounding air circuit breaker valve needs to be cut off, so that the key a can be taken out. In the same way, the key B can be removed.
For the convenience of understanding of those skilled in the art, the following detailed description will be made in conjunction with the schematic diagram of the gas circuit.
As shown in fig. 12, the embodiment of the present application provides a schematic diagram of an air path. When the normally open contact PanUCK of the pantograph up-bow gas circuit valve is closed, the pantograph up-bow gas circuit valve 1202 is closed. When the normally open contact PanUCK of the pantograph upward-bow circuit valve is opened, the pantograph upward-bow circuit valve 1202 is turned on, that is, the closing and opening of the normally open contact PanUCK of the pantograph upward-bow circuit valve are controlled, whereby the closing and opening states of the pantograph upward-bow circuit valve 1202 can be controlled.
The protective earthing cutoff valve EGOGK must be cut off to remove the key a and the key B, and when the key a or the key B is removed, the protective earthing cutoff valve EGOGK cannot be conducted, and the pantograph-lifting gas line valve 1202 cannot be conducted either.
Then, the gas circuit interlocking box 1102 is opened, the protective grounding gas circuit closing valve EGCGK is conducted by using the key a, and the key C is taken out. When the key C or D is removed, the protective grounding gas-closing valve EGCGK cannot be cut off. Namely, the default state of the protective grounded gas-combined path valve EGCGK is the cut-off state.
At this time, the pantograph is in a pantograph-descending state, and the pantograph cannot be lifted, so that the condition that the protective earthing switch is closed is met, compressed air can be supplied into the protective earthing switch-on cylinder, and meanwhile, the protective earthing disconnection valve is cut off, so that the compressed air cannot be supplied into the protective earthing switch-off cylinder, and therefore the protective earthing switch can be closed.
Further, after the key C and the key D are removed, the key E, F for maintaining the high-voltage equipment box and the key G for opening the external power supply receptacle box can be removed only after the key C and the key D are simultaneously inserted into the safety interlock box 1103. When the keys E, F and G are removed, the keys C and D cannot be removed, so that the interlocking control of the key box is realized, and the safety of maintenance work is further improved. When the keys E, F and G are returned, the key C and the key D can be removed. And after the key C and the key D are replaced and the corresponding air path valve is reset, the key A and the key B can be taken out. In fig. 12, MR is the total wind, 1201, and may be an 3/8P check valve, for example.
With continued reference to fig. 12, the operation principle of the maintenance of the high-voltage equipment of the rail vehicle is described above, and the operation principle of the rail vehicle in normal operation is described below.
When the rail vehicle normally runs, the protection grounding power-off solenoid valve EGOV is always electrified, and the protection grounding power-off valve EGOGK is in a conducting state, so that compressed air can be always supplied into the protection grounding power-off cylinder, and the protection grounding switch is ensured not to be closed without action; meanwhile, the protective grounding closing electromagnetic valve EGCV is always in a power-off state, the protective grounding closing air circuit valve EGCGK is in a cut-off state, namely the protective grounding closing air circuit valve EGCGK is closed between 1 and 2, and compressed air cannot pass through the protective grounding closing air circuit valve EGCV. When the protection grounding closing electromagnetic valve EGCV is accidentally electrified, the compressed air cannot reach the protection grounding closing cylinder, the protection grounding switch still cannot be closed, and the condition that the protection grounding switch is closed due to misoperation can be further avoided.
In an embodiment of the present application, the control circuit is configured to control the protection ground switch, and the control circuit includes: the protection grounding power-off electromagnetic valve, the protection grounding on-off electromagnetic valve, the first controller and the second controller; the first controller comprises a first normally closed contact and a first normally open contact; the second controller comprises a second normally closed contact and a second normally open contact; the first controller and the second controller are respectively connected in series with the protective grounding power-off electromagnetic valve and the branch where the protective grounding power-on electromagnetic valve is located; when the first normally-closed contact is connected with the second normally-closed contact, the protection grounding power-off electromagnetic valve is electrified; when the first normally open contact is connected with the second normally open contact, the protective grounding solenoid valve is powered off; the protection earthing switch includes: a first auxiliary contact; when the first controller and the second controller are in misoperation, the first normally closed contact and the second normally closed contact are both closed, the first normally open contact and the second normally open contact are both disconnected, the protection grounding power-off electromagnetic valve is electrified, the protection grounding power-on electromagnetic valve is electrified, compressed air is provided for the protection grounding power-off cylinder, the protection grounding power-on cylinder releases compressed air, and the protection grounding switch is in a disconnected state; when the first auxiliary contact is closed, the pantograph lifting electromagnetic valve is powered off, and the pantograph cannot lift, namely, an instruction of lifting the pantograph is cut off, so that the condition of protecting the grounding switch from being closed is met, and further potential safety hazards cannot be generated.
Having described the control circuit provided by the embodiments of the present application, a rail vehicle provided by the embodiments of the present application is described, the rail vehicle includes the control circuit described in the embodiments of the present application, and the rail vehicle further includes a pneumatic circuit, and the pneumatic circuit can be referred to as fig. 12.
Specifically, the pneumatic pipeline comprises a protective grounding gas-closing path valve EGCGK; the first end 1 of the protective grounding gas-path closing valve is connected with a high-voltage equipment box, the second end 2 of the protective grounding gas-path closing valve is connected with a protective grounding solenoid valve EGCV, and when the railway vehicle normally runs, the first end 1 and the second end 2 of the protective grounding gas-path closing valve are in a cut-off state, namely compressed air cannot pass through 1-2. When the protection grounding closing electromagnetic valve EGCV is accidentally electrified, the compressed air cannot reach the protection grounding closing cylinder, the protection grounding switch still cannot be closed, and the condition that the protection grounding switch is closed due to misoperation can be further avoided.
The pneumatic pipeline also comprises: pantograph lifting gas circuit valve 1202 and protective grounding gas circuit breaking valve EGOGK; the first end of the protective grounding gas-break valve EGOGK is connected with a high-voltage equipment box, and the second end of the protective grounding gas-break valve EGOGK is connected with a protective grounding power-break magnetic valve; the default state of the pantograph ascending gas circuit valve 1202 is on, and the default state of the protective grounding gas circuit breaking valve EGOGK is on; when the rail vehicle normally runs, because the protection grounding circuit breaking valve EGOGK is in a conducting state and the protection grounding circuit breaking magnetic valve EGOV is in a power-on state consistently, compressed air can be provided for the protection grounding circuit breaking cylinder, the pantograph is in a pantograph-ascending state and the protection grounding switch cannot be closed. When the rail vehicle needs maintenance, the pantograph lifting air circuit valve 1202 and the protective grounding open circuit valve EGOGK are cut off, and the protective grounding closed circuit valve EGCGK is conducted. After the protective grounding gas-mixing circuit valve EGCGK is conducted, compressed air can be provided in the protective grounding gas-mixing cylinder, and then the protective grounding gas-mixing electromagnetic valve EGCV is controlled to be powered on, so that the protective grounding switch can be closed, and potential safety hazards can not be caused.
The rail train provided by the embodiment realizes the interlocking control of the circuit and the gas circuit, realizes the multi-stage interlocking control when the rail train is maintained, further ensures the safety of maintenance personnel, and reduces the risk of causing potential safety hazards.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, they are described in a relatively simple manner, and reference may be made to some descriptions of method embodiments for relevant points. The above-described system embodiments are merely illustrative, and the units and modules described as separate components may or may not be physically separate. In addition, some or all of the units and modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application in any way. Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application. Those skilled in the art can now make numerous possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the claimed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still fall within the protection scope of the technical solution of the present application without departing from the content of the technical solution of the present application.
Claims (12)
1. A control circuit for controlling a protective grounding switch, the control circuit comprising: the protection grounding power-off electromagnetic valve, the protection grounding on-off electromagnetic valve, the first controller and the second controller;
the first controller comprises a first normally closed contact and a first normally open contact; the second controller comprises a second normally closed contact and a second normally open contact;
the first controller and the second controller are respectively connected in series with the protective grounding power-off electromagnetic valve and the branch where the protective grounding power-on electromagnetic valve is located; when the first normally-closed contact is connected with the second normally-closed contact, the protection grounding power-off electromagnetic valve is electrified; when the first normally open contact is connected with the second normally open contact, the protective grounding solenoid valve is powered off;
the protection earthing switch includes: a first auxiliary contact;
when the protection grounding switch is normally closed in an abnormal state, the first auxiliary contact is closed, so that the pantograph lifting electromagnetic valve is de-energized.
2. The control circuit of claim 1, wherein the protection ground disconnect solenoid valve comprises a main protection ground disconnect solenoid valve and a backup protection ground disconnect solenoid valve; the protective grounding solenoid valve comprises a main protective grounding solenoid valve and a backup protective grounding solenoid valve;
when the main protection grounding power-off magnetic valve is abnormal, starting the backup protection grounding power-off magnetic valve; and when the main protection grounding electromagnetic valve is abnormal, starting the backup protection grounding electromagnetic valve.
3. The control circuit of claim 2, wherein the first auxiliary contact is configured to be connected in series with a coil of a first protective earth switch state relay;
the normally closed contact of the first protective grounding switch state relay is connected with the coil of the pantograph rising relay in series;
and a first normally open contact of the pantograph lifting relay is connected with the pantograph lifting electromagnetic valve in series.
4. The control circuit of claim 3, wherein the second normally open contact of the pantograph relay is in series with a main breaker solenoid.
5. The control circuit of claim 4, wherein the protective grounding switch further comprises: a second auxiliary contact;
when the protection grounding switch is normally closed in an abnormal mode, the second auxiliary contact is closed, so that the normally open contact of the emergency power-off relay is opened;
and a normally open contact of the emergency power-off relay is connected in series with the pantograph-ascending electromagnetic valve.
6. The control circuit of claim 5, wherein the auxiliary normally open contact of the emergency disconnect relay is in series with the main breaker solenoid.
7. The control circuit of claim 5 or 6, wherein the second auxiliary contact is connected in series with a coil of a second protective earth switch state relay;
and the normally closed contact of the second protective grounding switch state relay is connected with the coil of the emergency power-off relay in series.
8. The control circuit of claim 7, wherein the coil of the second protective earthing switch state relay is in series with the normally open contact of the pantograph gas circuit valve;
before the protective grounding switch is closed, a normally open contact of the pantograph lifting gas circuit valve is closed, so that a coil of the second protective grounding switch state relay is electrified.
9. The control circuit of claim 8, wherein the pantograph gas circuit valve is shut off when a normally closed contact of the pantograph gas circuit valve is closed; when the pantograph lifting gas circuit valve and the protective grounding gas circuit breaking valve are both cut off, the protective grounding gas circuit closing valve is allowed to be controlled;
and when the protective grounding gas-mixing path valve is conducted, the high-voltage equipment box is allowed to be opened.
10. A rail vehicle comprising the control circuit of any one of claims 1-9, the rail vehicle further comprising: a pantograph;
and the control circuit is used for controlling the pantograph to rise or fall.
11. The rail vehicle of claim 10, further comprising: a pneumatic line;
the pneumatic line includes: a protective grounding gas-mixing path valve;
and the protective grounding gas-closing path valve is used for cutting off the protective grounding gas-closing path when the railway vehicle is in a normal working condition.
12. The rail vehicle of claim 11, wherein the pneumatic circuit further comprises: a pantograph lifting gas circuit valve and a protective grounding gas circuit breaking valve;
before the protective grounding switch is closed, the pantograph lifting air circuit valve is cut off; the protective grounding gas-break circuit valve is cut off; and conducting the protective grounding gas-mixing path valve.
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| CN202011095847.4A CN112172617B (en) | 2020-10-14 | 2020-10-14 | Control circuit and rail vehicle |
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| CN202011095847.4A CN112172617B (en) | 2020-10-14 | 2020-10-14 | Control circuit and rail vehicle |
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Cited By (1)
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| Publication number | Publication date |
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| CN112172617B (en) | 2022-03-01 |
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