CN211905599U - EGS ground protection switch safety inspection device - Google Patents
EGS ground protection switch safety inspection device Download PDFInfo
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- CN211905599U CN211905599U CN202020076505.7U CN202020076505U CN211905599U CN 211905599 U CN211905599 U CN 211905599U CN 202020076505 U CN202020076505 U CN 202020076505U CN 211905599 U CN211905599 U CN 211905599U
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Abstract
The utility model discloses an EGS ground protection switch safety detection device, whether there is induced current around the EGS main body is detected through setting up first current transformer and second current transformer respectively, if first current transformer and second current transformer all induce the induced current, can judge that the ground connection is successful, the high tension cable side discharges through the EGS main body, if first current transformer does not induce the induced current, second current transformer can induce the induced current, can judge that the ground connection is failed, overcurrent relay detection module is used for controlling alarm indication module to show the corresponding state, so as to remind maintainer to pay attention, overcurrent relay detection module can also transmit the corresponding state to the train display screen through data conversion module, for driver's check, can detect whether the EGS ground protection switch is really safe conduction ground connection, the safety is high.
Description
Technical Field
The utility model relates to a motor car safety inspection field, in particular to EGS ground protection switch safety inspection device.
Background
An electric multiple unit ground protection switch (EGS emergency ground switch) is a device for grounding under the condition that a vacuum circuit breaker cannot cut off a main circuit, or preventing a pantograph from rising accidentally after a vehicle returns to a garage, grounding the pantograph in advance, avoiding electric shock accidents, and discharging a capacitor in a high-voltage device to the ground. The existing grounding protection switch for loading only carries out simple switch blade action position state detection by a limit switch for detecting mechanical action in a control box, or judges the mechanical position state of a switch blade through the rotating angle of a cam fixed on a rotating shaft of a swing cylinder, and cannot detect whether a circuit is safely conducted and grounded after action, so that great potential safety hazard exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide an EGS ground protection switch safety inspection device, can detect whether real safety of EGS ground protection switch switches on ground connection, the security is higher.
According to the utility model discloses an EGS ground protection switch safety inspection device of first aspect embodiment, include:
the high-voltage circuit comprises a high-voltage cable side, an EGS high-voltage side connecting copper bar and an EGS main body which are sequentially connected, wherein the EGS main body is provided with a grounding knife switch for connecting an EGS grounding point;
a first current transformer wound between the EGS body and the EGS ground;
the overcurrent relay detection module is connected with the first current transformer;
the second current transformer is wound between the high-voltage cable side and the EGS high-voltage side wiring copper bar;
the current difference judging device is respectively connected with the second current transformer and the overcurrent relay detection module;
the alarm indication module is connected with the overcurrent relay detection module;
the data conversion module is connected with the overcurrent relay detection module;
train terminal module, including train display screen, train network terminal and train DRWTD device, the train display screen the train network terminal with train DRWTD device respectively with the data conversion module is connected, the train display screen is used for supplying the driver to look over the ground state of EGS main part to report to the police and indicate and show and EGS plug monitoring image shows, the train network terminal be used for with the data that conversion module transmission was come handles the transmission, train DRWTD device be used for with the data that conversion module transmission was come is saved.
According to the utility model discloses an EGS ground protection switch safety inspection device of first aspect embodiment has following beneficial effect at least: whether induced currents exist in the front and the back of the EGS main body or not is detected by respectively arranging a first current transformer and a second current transformer, if the induced currents are induced by the first current transformer and the second current transformer, the successful grounding can be judged, and the high-voltage cable side discharges through the EGS main body; if the first current transformer installed on the high-voltage cable side does not induce induction current, and the second current transformer induces induction current, the fact that the high-voltage side current flows through the second current transformer and weak current discharging phenomenon can be judged, however, because the switch is not switched on, the situation that the first current transformer does not have induction current appears, and at the moment, the grounding failure is judged, the overcurrent relay detection module is used for controlling the alarm indication module to visually display the corresponding state, so that the attention of maintenance personnel is reminded, the overcurrent relay detection module can also transmit the corresponding state to a train display screen through the data conversion module, a driver can check the state, whether the EGS grounding protection switch is really and safely conducted to be grounded can be detected, and the safety is high.
The utility model discloses an in some embodiments, alarm indication module includes bee calling organ and pilot lamp, bee calling organ with the pilot lamp respectively with overcurrent relay detection module connects. Set up bee calling organ and pilot lamp and can send sound warning and light warning respectively, wherein the pilot lamp can set up red light and green light respectively, and the red light is used for warning dangerous condition, and green light is used for instructing the safe condition.
The utility model discloses an in some embodiments, still including being used for shooting the connection status's of ground connection plug-in strip camera, the camera with overflow relay detection module with data conversion module connects. Set up the connection status that the camera is used for shooing ground connection plug-in strip, through installing in high definition digtal camera's artificial intelligence image recognition system, carry out data contrastive analysis with standard plug-in strip state and present plug-in strip state, can find whether ground connection plug-in strip exists failures such as contact failure and earth connection fracture, further investigate whether there is ground connection failure.
In some embodiments of the present invention, the device further comprises a remote control/monitoring device, wherein the remote control/monitoring device is connected to the camera. And a remote control/monitoring device is arranged, so that a maintainer can carry out remote troubleshooting.
In some embodiments of the present invention, the EGS main body further includes an EGS control loop connector, the EGS control loop connector is respectively connected with the current difference determination device and the camera.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
fig. 1 is a schematic diagram of an EGS ground protection switch safety detection device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an EGS ground protection switch;
FIG. 3 is a front view of an exterior view of an EGS ground protection switch;
FIG. 4 is a side view of an EGS ground protection switch profile;
fig. 5 is a top view of an outline of an EGS ground protection switch.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
An electric multiple unit ground protection switch (EGS emergency ground switch) is a device for grounding when a vacuum circuit breaker cannot cut off a main circuit, or preventing a pantograph from rising accidentally after a vehicle returns to a garage, grounding the pantograph in advance, preventing an electric shock accident, and discharging internal capacitance of high-voltage equipment, as shown in fig. 2 to 5. The existing grounding protection switch for loading only carries out simple switch blade action position state detection by a limit switch for detecting mechanical action in a control box, or judges the mechanical position state of a switch blade through the rotating angle of a cam fixed on a rotating shaft of a swing cylinder, and cannot detect whether a circuit is safely conducted and grounded after action, so that great potential safety hazard exists.
The potential hazards of the EGS grounding protection switch include: the brake shoe is characterized by comprising limit switch clamping stagnation (the amount of conductive grease is too small or not coated), limit switch action position deviation, knife switch clamping piece loosening and non-contact, poor contact (the cross section of the knife switch is oval and the contact surface is small), knife switch rusting, contact deformation, knife switch and knife switch holder non-contact caused by the external environment in the train operation process, braided grounding wire fracture (the condition that the existing train is blown by wind when the grounding wire is in the external environment for a long time, the train vibrates and interferes with the train body to cause partial grounding wire fracture), grounding wire and mounting seat non-contact (bolt loosening) and the like. And the condition that the burning loss of the grounding braided wire is not found and the grounding cannot be safely performed due to no record of the previous false arch lifting is solved.
At present, single mechanical action position judgment is carried out through a limit switch, the situation that EGS false grounding is possibly caused by no electric detection equipment is provided, and accidental pantograph lifting is caused when grounding occurs without an alarm device, so that a vehicle body is provided with high voltage and burns out equipment or electric shock accidents of operating personnel occur, false discharging of internal capacitors of the high voltage equipment occurs, the equipment is burnt out, or inexperienced maintenance operating personnel are not clear of the discharging process and directly contact the vehicle body or the high voltage equipment under the condition of no discharging to cause the electric shock accidents, and the EGS false grounding is caused when a vacuum circuit breaker cannot cut off a main circuit.
The motor train unit grounding protection switch safety detection device has the following functions: firstly, before the train is put into storage and overhauled, whether the EGS capacitor is completely discharged is detected. And secondly, judging whether the EGS is safely grounded. And thirdly, the pantograph is mistakenly lifted to give an alarm, a data transmission conversion device is arranged, the alarm is fed back to a train network system through a data transmission line, and a driver is displayed and reminded to carry out grounding conduction detection on a grounding protection switch and check whether equipment is burnt or not and whether a grounding braided wire is burnt or broken or not after the pantograph is mistakenly lifted on a display screen of the network system. And fourthly, when an emergency occurs in the operation process of the train, the vacuum circuit breaker cannot be disconnected and needs to be forcibly grounded through the EGS grounding protection switch, whether the grounding is successful is judged, signals are rapidly transmitted to the display screen through the data conversion device, and a driver forcibly lowers the bow.
Referring to fig. 1, the utility model discloses an EGS ground protection switch safety inspection device of first aspect embodiment includes:
the high-voltage circuit comprises a high-voltage cable side, an EGS high-voltage side connecting copper bar and an EGS main body which are sequentially connected, wherein the EGS main body is provided with a grounding knife switch for connecting an EGS grounding point;
a first current transformer wound between the EGS body and the EGS ground;
the overcurrent relay detection module is connected with the first current transformer;
the second current transformer is wound between the high-voltage cable side and the EGS high-voltage side wiring copper bar;
the current difference judging device is respectively connected with the second current transformer and the overcurrent relay detection module;
the alarm indication module is connected with the overcurrent relay detection module;
the data conversion module is connected with the overcurrent relay detection module;
train terminal module, including train display screen, train network terminal and train DRWTD device, the train display screen the train network terminal with train DRWTD device respectively with the data conversion module is connected, the train display screen is used for supplying the driver to look over the ground state of EGS main part to report to the police and indicate and show and EGS plug monitoring image shows, the train network terminal be used for with the data that conversion module transmission was come handles the transmission, train DRWTD device be used for with the data that conversion module transmission was come is saved.
According to the EGS ground protection switch safety detection device provided by the embodiment of the first aspect of the present invention, whether induced current exists in the front and back of the EGS main body is detected by respectively arranging the first current transformer and the second current transformer, if the first current transformer and the second current transformer induce induced current, the success of grounding can be judged, and the high voltage cable side discharges through the EGS main body; if the first current transformer installed on the high-voltage cable side does not induce induction current, and the second current transformer induces induction current, the fact that the high-voltage side current flows through the second current transformer and weak current discharging phenomenon can be judged, however, because the switch is not switched on, the situation that the first current transformer does not have induction current appears, and at the moment, the grounding failure is judged, the overcurrent relay detection module is used for controlling the alarm indication module to visually display the corresponding state, so that the attention of maintenance personnel is reminded, the overcurrent relay detection module can also transmit the corresponding state to a train display screen through the data conversion module, a driver can check the state, whether the EGS grounding protection switch is really and safely conducted to be grounded can be detected, and the safety is high.
The current difference determination device, the overcurrent relay detection module and the data conversion module all belong to common modules and devices in the prior art, and can be implemented by using a traditional hardware circuit or a control chip in cooperation with software programming configuration, which is not limited in this embodiment.
The utility model discloses an in some embodiments, alarm indication module includes bee calling organ and pilot lamp, bee calling organ with the pilot lamp respectively with overcurrent relay detection module connects. Set up bee calling organ and pilot lamp and can send sound warning and light warning respectively, wherein the pilot lamp can set up red light and green light respectively, and the red light is used for warning dangerous condition, and green light is used for instructing the safe condition.
The utility model discloses an in some embodiments, still including being used for shooting the connection status's of ground connection plug-in strip camera, the camera with overflow relay detection module with data conversion module connects. Set up the connection status that the camera is used for shooing ground connection plug-in strip, through installing in high definition digtal camera's artificial intelligence image recognition system, carry out data contrastive analysis with standard plug-in strip state and present plug-in strip state, can find whether ground connection plug-in strip exists failures such as contact failure and earth connection fracture, further investigate whether there is ground connection failure. The installation position of the camera is not specifically limited as long as the camera can shoot the connection state of the grounding knife switch.
In some embodiments of the present invention, the device further comprises a remote control/monitoring device, wherein the remote control/monitoring device is connected to the camera. And a remote control/monitoring device is arranged, so that a maintainer can carry out remote troubleshooting.
In some embodiments of the present invention, the EGS main body further includes an EGS control loop connector, the EGS control loop connector is respectively connected with the current difference determination device and the camera.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. An EGS ground protection switch safety detection device, characterized by includes:
the high-voltage circuit comprises a high-voltage cable side, an EGS high-voltage side connecting copper bar and an EGS main body which are sequentially connected, wherein the EGS main body is provided with a grounding knife switch for connecting an EGS grounding point;
a first current transformer wound between the EGS body and the EGS ground;
the overcurrent relay detection module is connected with the first current transformer;
the second current transformer is wound between the high-voltage cable side and the EGS high-voltage side wiring copper bar;
the current difference judging device is respectively connected with the second current transformer and the overcurrent relay detection module;
the alarm indication module is connected with the overcurrent relay detection module;
the data conversion module is connected with the overcurrent relay detection module;
train terminal module, including train display screen, train network terminal and train DRWTD device, the train display screen the train network terminal with train DRWTD device respectively with the data conversion module is connected, the train display screen is used for supplying the driver to look over the ground state of EGS main part to report to the police and indicate and show and EGS plug monitoring image shows, the train network terminal be used for with the data that conversion module transmission was come handles the transmission, train DRWTD device be used for with the data that conversion module transmission was come is saved.
2. The safety detection device for the EGS grounding protection switch as claimed in claim 1, wherein the alarm indication module comprises a buzzer and an indicator light, and the buzzer and the indicator light are respectively connected with the overcurrent relay detection module.
3. The safety detection device for the EGS grounding protection switch as claimed in claim 1, further comprising a camera for shooting the connection state of the grounding switch blade, wherein the camera is connected with the overcurrent relay detection module and the data conversion module.
4. The EGS grounding protection switch safety detection device as claimed in claim 3, further comprising a remote control/monitoring device, wherein the remote control/monitoring device is connected with the camera.
5. The EGS grounding protection switch safety detection device as claimed in claim 3, wherein the EGS main body further comprises an EGS control loop connector, and the EGS control loop connector is respectively connected with the current difference judgment device and the camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020076505.7U CN211905599U (en) | 2020-01-13 | 2020-01-13 | EGS ground protection switch safety inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020076505.7U CN211905599U (en) | 2020-01-13 | 2020-01-13 | EGS ground protection switch safety inspection device |
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| Publication Number | Publication Date |
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| CN211905599U true CN211905599U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020076505.7U Active CN211905599U (en) | 2020-01-13 | 2020-01-13 | EGS ground protection switch safety inspection device |
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| CN (1) | CN211905599U (en) |
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- 2020-01-13 CN CN202020076505.7U patent/CN211905599U/en active Active
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