CN216401170U - Automatic pantograph lowering protection device of pantograph of electric locomotive and electric locomotive - Google Patents
Automatic pantograph lowering protection device of pantograph of electric locomotive and electric locomotive Download PDFInfo
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- CN216401170U CN216401170U CN202122531391.8U CN202122531391U CN216401170U CN 216401170 U CN216401170 U CN 216401170U CN 202122531391 U CN202122531391 U CN 202122531391U CN 216401170 U CN216401170 U CN 216401170U
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Abstract
The utility model provides an automatic pantograph descending protection device of an electric locomotive and the electric locomotive, wherein the protection device is connected with a pantograph transmission assembly and comprises a control unit, and a toggle switch, an ADD quick discharge valve, an ADD isolation electromagnetic valve and an alarm branch which are connected with the control unit; the ADD quick discharge valve is connected with an ADD isolation electromagnetic valve; the ADD isolation electromagnetic valve is correspondingly connected with a first gear of the toggle switch; the alarm branch is correspondingly connected with a second gear of the toggle switch; the branch where the ADD isolation electromagnetic valve is located and the alarm branch are arranged in parallel; the alarm branch comprises a pressure switch and an alarm component which are connected with the control unit; the pressure switch is respectively connected with the pantograph transmission assembly, the ADD isolation electromagnetic valve and the alarm assembly. The pantograph lowering device can solve the problems that the existing pantograph lowering device is complex in structure, long in response time of pantograph lowering action and incapable of effectively cutting off a current loop before a pantograph is separated from a contact net during pantograph lowering.
Description
Technical Field
The utility model relates to the technical field of electric vehicles, in particular to an automatic pantograph lowering protection device of a pantograph of an electric locomotive and the electric locomotive.
Background
During the operation of the electric locomotive, the pantograph arranged on the roof of the electric locomotive obtains the electric energy required by the operation of the electric locomotive from the contact network, so that the current receiving condition of the pantograph directly determines the operation condition of the electric locomotive.
When the electric locomotive runs at a high speed, the pantograph can be subjected to loads in different forms, when a sliding plate of the pantograph is broken or abraded to reach the limit, the contact pressure between the pantograph and the contact net cannot meet the requirement, a gap exists between the pantograph and the contact net, the vehicle load is not cut off at the moment, high-temperature electric arcs can be generated between the pantograph and the contact net, and then the contact net is damaged. In order to reduce damage to the contact network, the current loop should be cut off as soon as possible and the pantograph should be detached from the contact network. However, the existing pantograph lowering device has a complex structure and long response time of pantograph lowering action, and a current loop cannot be effectively cut off before the pantograph is separated from a contact net during pantograph lowering.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an automatic pantograph descending protection device of an electric locomotive and the electric locomotive, which are used for solving the problems that the conventional pantograph descending device is complex in structure, long in response time of pantograph descending action and incapable of effectively cutting off a current loop before a pantograph is separated from a contact net during pantograph descending.
In a first aspect, the present invention provides an automatic pantograph descending protection device for an electric locomotive, where the protection device is connected to a pantograph transmission assembly, and the protection device includes: the control unit, and a toggle switch, an ADD quick discharge valve, an ADD isolation electromagnetic valve and an alarm branch which are connected with the control unit; the ADD quick discharge valve is connected with the ADD isolation electromagnetic valve; the toggle switch is provided with a first gear and a second gear; the ADD isolation electromagnetic valve is correspondingly connected with a first gear of the toggle switch; the alarm branch is correspondingly connected with a second gear of the toggle switch; the branch where the ADD isolation electromagnetic valve is located and the alarm branch are arranged in parallel; the alarm branch comprises a pressure switch and an alarm component which are connected with the control unit; the pressure switch is respectively connected with the pantograph transmission assembly, the ADD isolation electromagnetic valve and the alarm assembly; the control unit is used for controlling the toggle switch to be switched to a second gear when the pressure switch is conducted so as to enable the alarm assembly to work; the control unit is also used for controlling the ADD isolating electromagnetic valve to be closed when the toggle switch is switched to a second gear.
With reference to the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the alarm component includes an indicator light and an alarm; the pressure switch is respectively connected with the indicator light and the alarm; the control unit is also used for controlling the toggle switch to be switched to a second gear when the pressure switch is switched on so as to respectively enable the indicator light and the alarm to work.
With reference to the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the protection device further includes an operation indication branch; the operation indication branch is correspondingly connected with a second gear of the toggle switch; the operation indication branch and the alarm branch are arranged in parallel; the control unit is also used for controlling the toggle switch to be switched to a second gear when the pressure switch is conducted, so that the indicating branch circuit works.
With reference to the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the operation indication branch includes a first delay relay and an operation indication lamp, which are connected in sequence; the control unit is also used for controlling the toggle switch to be switched to a second gear when the pressure switch is switched on so as to control the operation indicator lamp to work through the first time delay relay.
With reference to the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the alarm branch further includes a second time delay relay; the second time delay relay is respectively connected with the pressure switch and a second gear of the toggle switch; and the second time delay relay is used for controlling the alarm assembly to work when a preset time threshold is reached and the toggle switch is switched to a second gear.
With reference to the first aspect, the present disclosure provides a fifth possible implementation manner of the first aspect, wherein the protection device further includes a pantograph-lowering test solenoid valve connected to the control unit; the pantograph reduction test electromagnetic valve is connected with the pantograph slide plate assembly and the ADD quick discharge valve through insulating pipes respectively; the branch where the bow-lowering test electromagnetic valve is located and the branch where the ADD isolation electromagnetic valve is located are arranged in parallel; the control unit is also used for controlling the opening of the bow-reducing test electromagnetic valve when the bow-reducing test is carried out.
With reference to the first aspect, the present invention provides a sixth possible implementation manner of the first aspect, wherein the branch where the pantograph lowering test solenoid valve is located further includes a test button switch connected to the control unit; the test button switch is connected with the bow-lowering test electromagnetic valve; the control unit is also used for responding to the pressing operation of the test button switch and controlling the opening of the bow-reducing test electromagnetic valve.
With reference to the first aspect, the present disclosure provides a seventh possible implementation manner of the first aspect, wherein the protection device further includes a pantograph ascending solenoid valve and a pantograph ascending buffer valve, both of which are connected to the control unit; the pantograph lifting buffer valve is respectively connected with the pantograph lifting electromagnetic valve, the pantograph transmission assembly and the pressure switch; the control unit is also used for respectively controlling the bow lifting buffer valve and the bow lifting electromagnetic valve to be opened when the pressure switch is disconnected.
With reference to the first aspect, the present invention provides an eighth possible implementation manner of the first aspect, wherein an air cleaner is disposed on a pipeline between the pantograph buffer valve and the pressure switch.
In a second aspect, the present invention provides an electric locomotive comprising a protection device as defined in any one of the preceding embodiments.
The utility model provides an automatic pantograph descending protection device of a pantograph of an electric locomotive and the electric locomotive, wherein the protection device is connected with a pantograph transmission assembly and comprises a control unit, and a toggle switch, an ADD quick discharge valve, an ADD isolation electromagnetic valve and an alarm branch which are connected with the control unit; the ADD quick discharge valve is connected with an ADD isolation electromagnetic valve; the toggle switch is provided with a first gear and a second gear, the ADD isolation electromagnetic valve is correspondingly connected with the first gear of the toggle switch, the alarm branch is correspondingly connected with the second gear of the toggle switch, and the branch where the ADD isolation electromagnetic valve is located and the alarm branch are arranged in parallel; the alarm branch comprises a pressure switch and an alarm assembly which are connected with the control unit, and the pressure switch is respectively connected with the ADD isolation solenoid valve and the alarm assembly. The protection device has a simple structure and short response time of pantograph lowering action, when the contact pressure of the pantograph and a contact network is too small in the running process of the locomotive, the pressure switch can be conducted, the toggle switch can be switched to the second gear through the control unit to trigger the alarm assembly to automatically alarm, so that a locomotive driver can cut off a current loop in time after receiving an alarm prompt and lower the pantograph to be separated from the contact network; when the ADD quick exhaust valve malfunctions or fails, the control unit can control the ADD isolation electromagnetic valve to be closed to isolate the ADD quick exhaust valve on the car roof, so that the contact pressure of the pantograph and a contact net can reach a preset value, and the pantograph of the locomotive can be ensured to normally rise.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an automatic pantograph descending protection device for a pantograph of an electric locomotive according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another automatic pantograph descending protection device for an electric locomotive according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another automatic pantograph descending protection device for an electric locomotive according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another pantograph automatic pantograph lowering protection device of an electric locomotive according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another automatic pantograph descending protection device for an electric locomotive according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an automatic pantograph descending protection device for an electric locomotive according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an automatic pantograph descending protection device for an electric locomotive according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an automatic pantograph descending protection device for an electric locomotive according to an embodiment of the present invention;
fig. 9 is a schematic view of a partial gas path structure of another automatic pantograph lowering protection device for an electric locomotive according to an embodiment of the present invention;
fig. 10 is a schematic partial circuit diagram of an automatic pantograph descending protection device of an electric locomotive according to an embodiment of the present invention;
fig. 11 is a schematic partial circuit diagram of another automatic pantograph descending protection device for an electric locomotive according to an embodiment of the present invention.
Icon: 1-lifting a bow electromagnetic valve; 2-lifting a bow buffer valve; 3-pantograph transmission assembly; 31-pantograph transmission reservoir; 32-a piston rod; 33-a spring; 4-an air filter; 5-a pressure switch; 6-ADD isolation solenoid valve; 7-ADD quick-discharge valve; 8-pantograph pan assembly; 9-bow reduction test electromagnetic valve; 10-an insulating tube; 11-a first fuse; 12-toggle switches; 121-first gear; 122-second gear; 13-test button switch; 14-a first time delay relay; 15-a second time delay relay; 16-running indicator light; 17-an alarm component; 171-alarm indicator light; 172-alarm; 18-a control unit; 19-a second fuse; 20-time delay relay power supply unit.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
When the electric locomotive runs at a high speed, when the sliding plate of the pantograph is broken or abraded to the limit, the contact pressure between the pantograph and the contact net cannot meet the requirement, but the load of the electric locomotive is not cut off at the moment, and high-heat electric arc can be generated between the pantograph and the contact net, so that the contact net is damaged. In order to reduce damage to the contact network, the current loop should be cut off as soon as possible and the pantograph should be detached from the contact network. However, the existing pantograph lowering device has a complex structure and long response time of pantograph lowering action, and a current loop cannot be effectively cut off before the pantograph is separated from a contact net during pantograph lowering. Based on this, the embodiment of the utility model provides an automatic pantograph descending protection device for an electric locomotive and the electric locomotive, so as to solve the problems that the conventional pantograph descending device is complex in structure, long in response time of pantograph descending action, and incapable of effectively cutting off a current loop before a pantograph is separated from a contact net during pantograph descending.
For the convenience of understanding the embodiment, the automatic pantograph descending protection device of an electric locomotive disclosed by the embodiment of the utility model is first described in detail.
Referring to fig. 1, a schematic structural diagram of an automatic pantograph descending protection device for a pantograph of an electric locomotive, the protection device being connected to a pantograph transmission assembly, the protection device mainly includes: the control unit 18, and a toggle switch 12, an ADD quick discharge valve 7, an ADD isolation electromagnetic valve 6 and an alarm branch which are connected with the control unit 18; the ADD quick discharge valve 7 is connected with an ADD isolation electromagnetic valve 6; the toggle switch 12 is provided with a first gear 121 and a second gear 122; the ADD isolation electromagnetic valve 6 is correspondingly connected with a first gear 121 of the toggle switch 12; the alarm branch is correspondingly connected with the second gear 122 of the toggle switch 12; the branch where the ADD isolation electromagnetic valve 6 is located and the alarm branch are arranged in parallel; the alarm branch comprises a pressure switch 5 and an alarm component 17 which are both connected with a control unit 18; the pressure switch 5 is respectively connected with the pantograph transmission component 3, the ADD isolation electromagnetic valve 6 and the alarm component 17.
The control unit 18 may be a master control MCU of the locomotive control system, or an MCU separately set in the locomotive control system and connected to the master control MCU, and may be determined according to actual conditions, which is not limited herein.
In the prior art, the pantograph transmission assembly is a combination of a plurality of pneumatic components (a cylinder, a spring, a piston rod, and the like) for driving the pantograph to ascend and descend. In order to realize the pantograph lifting of the locomotive pantograph, compressed air can be introduced into the pantograph transmission assembly through an air compressor on the locomotive, and then the pantograph transmission assembly drives the locomotive pantograph to lift. The switch state (on or off) of the pressure switch 5 can reflect the pantograph lifting pressure state of the pantograph transmission assembly 3; for example, the pressure switch 5 is always in an off state during normal pantograph lifting of the locomotive pantograph, and is only in an on state when the pantograph lifting pressure of the pantograph transmission assembly 3 is abnormal (for example, a preset value is not always reached during pantograph lifting). The ADD quick release valve 7 is typically located outside the locomotive roof and communicates with the air passage of the pantograph slider assembly 8 via insulated air hoses.
When the locomotive pantograph normally rises, the control unit 18 controls the ADD quick exhaust valve 7 to be closed, the control unit 18 controls the ADD isolation electromagnetic valve 6 to be opened, the control unit 18 controls the toggle switch 12 to be switched to the second gear 122, the control unit 18 controls the pressure switch 5 to be conducted until the pressure switch 5 reaches a preset pressure value, the pressure switch is automatically disconnected, and the locomotive pantograph normally rises; after the pantograph of the locomotive normally rises, if the pantograph of the locomotive normally falls, the control unit 18 can control the ADD quick exhaust valve 7 to open, so that compressed air in a sliding plate air path of the pantograph and compressed air in the pantograph transmission assembly 3 are exhausted outwards.
In the running process of the locomotive, if the contact pressure between a sliding plate of the pantograph and a contact net is too small (such as the sliding plate is damaged, the sliding plate is worn to the limit, an air pipe is damaged and the like), the pressure of an air outlet of the ADD quick exhaust valve 7 is reduced, and the ADD quick exhaust valve 7 can be automatically opened until the difference between the air inlet pressure and the air outlet pressure reaches a certain value; because the control unit 18 can continuously monitor the on-off state of the ADD quick exhaust valve 7, when the control unit 18 monitors that the ADD quick exhaust valve 7 is opened, the control unit can control the pressure switch 5 to be conducted, and when the pressure switch 5 is conducted, the control unit controls the toggle switch 12 to be switched to the second gear position 122, so that the alarm component 17 works, and a locomotive driver can timely cut off a current loop and drop a pantograph to be separated from a catenary after receiving an alarm prompt.
If the contact pressure between the sliding plate of the air pipe pantograph and the contact net is not damaged or the sliding plate is worn to the limit due to the fact that the contact pressure is too small, but the ADD quick exhaust valve 7 is in misoperation or the air hose between the ADD quick exhaust valve 7 and the sliding plate air passage of the pantograph is broken, after the automatic pantograph descending process is carried out through the protection device, in order to guarantee that the pantograph of the locomotive can normally ascend, a locomotive driver can control the ADD isolation electromagnetic valve 6 to be closed to isolate the ADD quick exhaust valve on the roof through the control unit 18 when the toggle switch 12 is switched to the second gear position 122; by the operation mode, even if the error operation of the ADD quick exhaust valve 7 occurs or an air hose between the ADD quick exhaust valve 7 and a sliding plate air passage of a pantograph is broken, a locomotive driver can still perform pantograph lifting operation on the locomotive pantograph through the protection device so as to ensure the normal operation of the locomotive.
The utility model provides an automatic pantograph descending protection device of a pantograph of an electric locomotive, which is connected with a pantograph transmission assembly and comprises a control unit, and a toggle switch, an ADD quick discharge valve, an ADD isolation electromagnetic valve and an alarm branch which are connected with the control unit; the ADD quick discharge valve is connected with an ADD isolation electromagnetic valve; the toggle switch is provided with a first gear and a second gear, the ADD isolation electromagnetic valve is correspondingly connected with the first gear of the toggle switch, the alarm branch is correspondingly connected with the second gear of the toggle switch, and the branch where the ADD isolation electromagnetic valve is located and the alarm branch are arranged in parallel; the alarm branch comprises a pressure switch and an alarm assembly which are connected with the control unit, and the pressure switch is respectively connected with the ADD isolation solenoid valve and the alarm assembly. The protection device has a simple structure and short response time of pantograph lowering action, when the contact pressure of the pantograph and a contact network is too small in the running process of the locomotive, the pressure switch can be conducted, the toggle switch can be switched to the second gear through the control unit to trigger the alarm assembly to automatically alarm, so that a locomotive driver can cut off a current loop in time after receiving an alarm prompt and lower the pantograph to be separated from the contact network; when the ADD quick exhaust valve malfunctions or fails, the control unit can control the ADD isolation electromagnetic valve to be closed to isolate the ADD quick exhaust valve on the car roof, so that the contact pressure of the pantograph and a contact net can reach a preset value, and the pantograph of the locomotive can be ensured to normally rise.
On the basis of the protection device, in order to further improve the intuitiveness of the alarm, the embodiment of the utility model further provides another automatic pantograph descending protection device for an electric locomotive, and referring to the structural schematic diagram of the automatic pantograph descending protection device for another electric locomotive shown in fig. 2, in the protection device, an alarm component 17 includes an alarm indicator light 171 and an alarm 172; the pressure switch 5 is respectively connected with an alarm indicator light 171 and an alarm 172; the control unit 18 can control the toggle switch 12 to switch to the second gear 122 when the pressure switch 5 is turned on, so as to respectively operate the alarm indicator light 171 and the alarm 172, so that a locomotive driver can see that the alarm indicator light 171 is on and hear the alarm sound sent by the alarm 172, then cut off the current loop in time and make the pantograph descend to be separated from the catenary.
On the basis of the protection device, in order to further indicate the operation state of the protection device, an embodiment of the present invention further provides another automatic pantograph descending protection device for an electric locomotive, referring to a schematic structural diagram of the automatic pantograph descending protection device for another electric locomotive shown in fig. 3, where the protection device further includes an operation indication branch; the operation indication branch is correspondingly connected with the second gear 122 of the toggle switch 12; the operation indication branch and the alarm branch are arranged in parallel; the toggle switch 12 can be controlled by the control unit to switch to the second gear 122 when the pressure switch 5 is turned on, so as to operate the indicating branch.
In practical applications, the operation indication branch may include a first delay relay 14 and an operation indication lamp 16 connected in sequence. Based on this, when the locomotive pantograph normally rises, the control unit 18 controls the pressure switch 5 to be switched off, the control unit 18 controls the toggle switch 12 to be switched to the second gear 122, the first delay relay 14 works, and the first delay relay 14 controls the operation indicator lamp 16 to work (i.e. to be turned on); when the locomotive pantograph normally descends, the first delay relay 14 is closed, and the running indicator light 16 is closed (i.e. turned off).
On the basis of the protection device, in order to further avoid the alarm branch circuit from interfering with the locomotive driver when the locomotive pantograph normally ascends and descends, an embodiment of the present invention further provides another automatic pantograph descending protection device for an electric locomotive, referring to a schematic structural diagram of another automatic pantograph descending protection device for an electric locomotive shown in fig. 4, in the protection device, the alarm branch circuit may further include a second delay relay 15, and the second delay relay 15 is respectively connected to the pressure switch 5 and the second gear 122 of the toggle switch 12; the second time delay relay is used for controlling the operation of the alarm component 17 when the preset time threshold is reached and the toggle switch 12 is switched to the second gear 122.
On the basis of the protection device, in order to further detect the performance of the protection device, another automatic pantograph descending protection device for an electric locomotive is further provided in an embodiment of the present invention, referring to a schematic structural diagram of the automatic pantograph descending protection device for another electric locomotive shown in fig. 5, the protection device may further include a pantograph descending test solenoid valve 9 connected to the control unit 18; the pantograph lowering test electromagnetic valve 9 is respectively connected with the pantograph slide plate assembly 8 and the ADD quick discharge valve 7 through an insulating pipe 10; the branch where the bow-lowering test electromagnetic valve 9 is located and the branch where the ADD isolation electromagnetic valve 6 is located are arranged in parallel; the control unit 18 can control the pantograph test electromagnetic valve 9 to be opened when the pantograph test is carried out so as to simulate the situation that the contact pressure between the sliding plate of the pantograph and a contact net is too small (such as damage of the sliding plate, abrasion of the sliding plate to the limit, damage of an air pipe and the like) in the running process of the locomotive. The working principle of the protection device is the same as the related content, and the description thereof is omitted.
On the basis of the protection device, in order to facilitate operation, another automatic pantograph descending protection device for an electric locomotive is further provided in an embodiment of the present invention, referring to a schematic structural diagram of another automatic pantograph descending protection device for an electric locomotive shown in fig. 6, where the protection device may be provided with a test button switch 13 connected to the control unit 18 in a branch where the pantograph descending test solenoid valve 9 is located; the test button switch 13 is connected with the bow-lowering test electromagnetic valve 9; the driver can press the test button switch 13 to trigger the control unit 18 to control the opening of the pantograph test solenoid valve 9 in response to the pressing operation of the test button switch 13.
On the basis of the protection device, in consideration of the actual situation that the pantograph of the electric locomotive normally rises, the embodiment of the utility model also provides another automatic pantograph descending protection device of the electric locomotive, referring to the structural schematic diagram of the automatic pantograph descending protection device of another electric locomotive shown in fig. 7, and the protection device can further comprise a pantograph ascending electromagnetic valve 1 and a pantograph ascending buffer valve 2 which are both connected with the control unit 18; the pantograph lifting buffer valve 2 is respectively connected with a pantograph lifting electromagnetic valve 1, a pantograph transmission component 3 and a pressure switch 5; the pantograph lifting buffer valve 2 and the pantograph lifting electromagnetic valve 1 can be respectively controlled to be opened by the control unit 18 when the pressure switch 5 is disconnected. When the locomotive pantograph normally rises, compressed air can be introduced into the pantograph transmission assembly after being buffered by the pantograph rising solenoid valve 1 and the pantograph rising buffer valve 2 through the air compressor on the locomotive, and then the locomotive pantograph is driven to rise through the pantograph transmission assembly.
On the basis of the protection device, in consideration of the sensitivity and the service life of the pressure switch 5, another automatic pantograph descending protection device for an electric locomotive is further provided in the embodiment of the utility model, and referring to a structural schematic diagram of the automatic pantograph descending protection device for another electric locomotive shown in fig. 8, in the protection device, an air filter 4 is arranged on a pipeline between the pantograph ascending buffer valve 2 and the pressure switch 5.
Based on the protection device, the embodiment of the utility model also provides the electric locomotive which comprises the protection device.
Based on a specific application scenario, an embodiment of the present invention further provides another automatic pantograph descending protection device for an electric locomotive, where fig. 9 shows a local gas path structure of the protection device, and fig. 10 and 11 respectively show a local circuit structure of the protection device. The working principle of the protection device can be referred to the following description.
(1) Aiming at the situation that a locomotive pantograph normally rises by a locomotive driver:
the working process of the circuit part is as follows: after a locomotive driver presses a pantograph switch to a pantograph lifting position through a control console, an MCU of a locomotive control system controls a toggle switch 12 to be switched to a second gear 122, a 543 power supply (DC110V) starts power supply, current flows to a delay relay power supply unit 20 through a second fuse 19, the delay relay power supply unit 20 enables a first delay relay 14 to work, and after the first delay relay 14 delays for 25 seconds, an operation indicator lamp 16 normally lights. If the pantograph-ascending pressure is larger than or equal to 300kPa within 25 seconds of the time delay of the first time delay relay 14, the pressure switch 5 is disconnected, and the alarm indicator light 171 and the alarm 172 do not work.
The working process of the gas circuit part is divided into two parts, which are respectively: (a) compressed air enters the pantograph transmission air cylinder 31 after being buffered by the pantograph lifting buffer valve 2 through the pantograph lifting electromagnetic valve 1, and the pantograph transmission air cylinder 31 pushes the piston rod 32 to extend outwards so as to drive the pantograph to lift. (b) Compressed air is buffered by the pantograph lifting solenoid valve 1 through the pantograph lifting buffer valve 2, filtered by the air filter 4, sequentially passes through the pressure switch 5, the ADD isolation solenoid valve 6, the ADD quick discharge valve 7 and the insulating pipe 10, enters an air path of the pantograph slide plate assembly 8, and the pantograph slide plate is in contact with a contact net.
(2) Aiming at the situation that a locomotive pantograph normally descends by a locomotive driver:
the working process of the circuit part is as follows: after a locomotive driver presses a pantograph switch to a pantograph descending position through a control console, a 543(DC110V) power supply is disconnected, the first delay relay 14 and the second delay relay 15 stop working, the operation indicator lamp 16 is turned off, and the alarm indicator lamp 171 and the alarm 172 do not work.
The working process of the gas path part is as follows: the pantograph lifting electromagnetic valve 1 is powered off, an exhaust port of the pantograph lifting electromagnetic valve 1 is opened, an exhaust port of the pantograph lifting buffer valve 2 is opened, a piston rod 32 in the pantograph transmission air cylinder 31 retracts inwards under the action of a spring 33, compressed air in the pantograph transmission air cylinder 31 and compressed air in an air path of the pantograph sliding plate assembly 8 are buffered by the pantograph lifting buffer valve 2 and then are exhausted through the pantograph lifting electromagnetic valve 1, and the pantograph falls.
(3) For the case of automatic bow lowering by the protection device:
the working process of the circuit part is as follows: the 780 power supply (DC24V) starts to supply power, the current flows to the second gear 122 of the toggle switch 12 through the first fuse 11, the current flows to the alarm 172 and the alarm indicator light 171 through the pressure switch 5 after the second time delay relay 15 delays for 25 seconds, the alarm indicator light 171 is turned on, and the alarm 172 gives out a voice alarm.
The working process of the gas path part is as follows: the ADD quick exhaust valve 7 is opened, and because the air inlet flow of the compressed air passing through the pantograph lifting buffer valve 2 is far smaller than the exhaust flow passing through the ADD quick exhaust valve 7 (the area of the air inlet channel opening of the pantograph lifting buffer valve 2 is far smaller than the area of the exhaust opening of the ADD quick exhaust valve 7), the compressed air in the pantograph transmission air cylinder 31 can be exhausted through the exhaust opening of the ADD quick exhaust valve 7, the piston rod 32 in the pantograph transmission air cylinder 31 retracts inwards under the action of the spring 33, and the pantograph descends.
(4) Aiming at the situation that the pantograph of the locomotive is recovered through the protection device:
the working process of the circuit part is as follows: the 780 power supply (DC24V) initiates power, current flows through the first fuse 11 to the first gear 121 of the toggle switch 12, and the ADD isolation solenoid is energized closed.
The working process of the gas path part is as follows: the compressed air is buffered by the rising bow solenoid valve 1 via the rising bow buffer valve 2, filtered by the air cleaner 4, and passed through the pressure switch 5 to the ADD isolation solenoid valve 6.
(5) For the case of performing a bow reduction test to test the performance of the protection device:
the working process of the circuit part is divided into two parts, which are respectively: (a) starting power supply by a 780 power supply (DC24V), opening the test button switch 13, enabling current to sequentially pass through the first fuse 11 and the test button switch 13 to reach the pantograph reduction test electromagnetic valve 9, and enabling the pantograph reduction test electromagnetic valve 9 to be opened in a power-on mode; (b) the 780 power supply (DC24V) starts to supply power, the current flows to the second gear 122 of the toggle switch 12 through the first fuse 11, the current flows to the alarm 172 and the alarm indicator light 171 through the pressure switch 5 after the second time delay relay 15 delays for 25 seconds, the alarm indicator light 171 is turned on, and the alarm 172 gives out a voice alarm.
The working process of the gas path part is completely the same as the situation of automatic bow lowering through the protection device, and the detailed description is omitted.
In practical application, the air filter 4, the pressure switch 5, the ADD isolation electromagnetic valve 6 and the ADD quick-discharge valve 7 can be integrated into a shell for convenience in operation. Furthermore, the first fuse 11, the toggle switch 12, the test button switch 13, the first delay relay 14, the second delay relay 15, the operation indicator lamp 16, the alarm indicator lamp 171, the alarm 172, the control unit 18, the second fuse 19, and the delay relay power supply unit 20 may be integrated into one housing.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an automatic bow protection device that falls of pantograph of electric locomotive which characterized in that, protection device is connected with pantograph transmission assembly, includes: the control unit, and a toggle switch, an ADD quick discharge valve, an ADD isolation electromagnetic valve and an alarm branch which are connected with the control unit; the ADD quick discharge valve is connected with the ADD isolation electromagnetic valve; the toggle switch is provided with a first gear and a second gear; the ADD isolation electromagnetic valve is correspondingly connected with a first gear of the toggle switch; the alarm branch is correspondingly connected with a second gear of the toggle switch; the branch where the ADD isolation electromagnetic valve is located and the alarm branch are arranged in parallel;
the alarm branch comprises a pressure switch and an alarm component which are connected with the control unit; the pressure switch is respectively connected with the pantograph transmission assembly, the ADD isolation electromagnetic valve and the alarm assembly;
the control unit is used for controlling the toggle switch to be switched to a second gear when the pressure switch is conducted so as to enable the alarm assembly to work;
the control unit is also used for controlling the ADD isolating electromagnetic valve to be closed when the toggle switch is switched to a second gear.
2. The protective device of claim 1, wherein the alarm assembly comprises an indicator light and an alarm; the pressure switch is respectively connected with the indicator light and the alarm;
the control unit is also used for controlling the toggle switch to be switched to a second gear when the pressure switch is switched on so as to respectively enable the indicator light and the alarm to work.
3. The protection device of claim 1, further comprising an operation indication branch; the operation indication branch is correspondingly connected with a second gear of the toggle switch; the operation indication branch and the alarm branch are arranged in parallel;
the control unit is also used for controlling the toggle switch to be switched to a second gear when the pressure switch is conducted, so that the indicating branch circuit works.
4. The protection device according to claim 3, wherein the operation indication branch comprises a first time delay relay and an operation indication lamp which are connected in sequence;
the control unit is also used for controlling the toggle switch to be switched to a second gear when the pressure switch is switched on so as to control the operation indicator lamp to work through the first time delay relay.
5. The protection device of claim 4, wherein the alarm branch further comprises a second time delay relay; the second time delay relay is respectively connected with the pressure switch and a second gear of the toggle switch;
and the second time delay relay is used for controlling the alarm assembly to work when a preset time threshold is reached and the toggle switch is switched to a second gear.
6. The protection device according to any one of claims 1-5, further comprising a droop test solenoid valve connected to each of the control units; the pantograph reduction test electromagnetic valve is connected with the pantograph slide plate assembly and the ADD quick discharge valve through insulating pipes respectively; the branch where the bow-lowering test electromagnetic valve is located and the branch where the ADD isolation electromagnetic valve is located are arranged in parallel;
the control unit is also used for controlling the opening of the bow-reducing test electromagnetic valve when the bow-reducing test is carried out.
7. The protection device according to claim 6, wherein the branch where the bow-reducing test solenoid valve is located further comprises a test button switch connected with the control unit; the test button switch is connected with the bow-lowering test electromagnetic valve;
the control unit is also used for responding to the pressing operation of the test button switch and controlling the opening of the bow-reducing test electromagnetic valve.
8. The protection device according to any one of claims 1-5, further comprising a pantograph ascending solenoid valve and a pantograph ascending buffer valve both connected to the control unit; the pantograph lifting buffer valve is respectively connected with the pantograph lifting electromagnetic valve, the pantograph transmission assembly and the pressure switch;
the control unit is also used for respectively controlling the bow lifting buffer valve and the bow lifting electromagnetic valve to be opened when the pressure switch is disconnected.
9. The protection device of claim 8, wherein an air filter is disposed in the line between the pantograph cushion valve and the pressure switch.
10. An electric locomotive, characterized in that it comprises a protection device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122531391.8U CN216401170U (en) | 2021-10-20 | 2021-10-20 | Automatic pantograph lowering protection device of pantograph of electric locomotive and electric locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122531391.8U CN216401170U (en) | 2021-10-20 | 2021-10-20 | Automatic pantograph lowering protection device of pantograph of electric locomotive and electric locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216401170U true CN216401170U (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122531391.8U Active CN216401170U (en) | 2021-10-20 | 2021-10-20 | Automatic pantograph lowering protection device of pantograph of electric locomotive and electric locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216401170U (en) |
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2021
- 2021-10-20 CN CN202122531391.8U patent/CN216401170U/en active Active
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