CN113291350A - EMUs high-pressure tank early warning device and EMUs that discharges - Google Patents
EMUs high-pressure tank early warning device and EMUs that discharges Download PDFInfo
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- CN113291350A CN113291350A CN202110389708.0A CN202110389708A CN113291350A CN 113291350 A CN113291350 A CN 113291350A CN 202110389708 A CN202110389708 A CN 202110389708A CN 113291350 A CN113291350 A CN 113291350A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0081—On-board diagnosis or maintenance
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Abstract
The invention is suitable for the technical field of discharge detection, and provides a high-voltage box discharge early warning device of a motor train unit and the motor train unit, wherein the device comprises: the induction module and the discharge early warning module are arranged in a high-voltage box of the motor train unit; the induction module is connected with the discharge early warning module and used for inducing an electric field signal in the high-voltage box and sending the electric field signal to the discharge early warning module; the discharge early warning module is also connected with a power supply of the motor train unit and used for receiving the electric field signal and outputting an alarm signal when the level of the electric field signal is higher than that of the reference voltage, so that faults of high-voltage electrical equipment in the high-voltage box can be found in time, maintenance can be carried out in time, and the operation reliability of high-voltage components in the high-voltage box of the motor train unit is improved.
Description
Technical Field
The invention belongs to the technical field of discharge detection, and particularly relates to a high-voltage box discharge early warning device of a motor train unit and the motor train unit.
Background
Along with the rapid development of the motor train unit, more and more intelligent equipment is provided, the high-voltage box is used as a core device for supplying electric energy to the motor train unit, and the running state of the high-voltage box determines the running safety and reliability of the motor train unit. When a high-voltage component in a high-voltage box works, the high-voltage component is limited by an insulating material manufacturing process and environmental factors, the phenomena of electric equipment discharge and flicker in the high-voltage box easily occur, the phenomena can not directly cause insulation accidents, but the insulation aging of the high-voltage component can be accelerated, the insulation performance of the electrical component is reduced, and therefore the high-voltage component must be found and eliminated in time.
At present, a mode of replacing a fault part after a high-voltage fault occurs is usually adopted for detecting high-voltage electrical equipment in a high-voltage box, so that the fault cannot be found in time, and the operation reliability of high-voltage components in the high-voltage box of the motor train unit is reduced.
Disclosure of Invention
In view of this, the embodiment of the invention provides a high-voltage box discharge early warning device for a motor train unit and the motor train unit, and aims to solve the problems that faults of high-voltage electrical equipment in the high-voltage box cannot be found in time and the operation reliability of high-voltage components in the high-voltage box of the motor train unit cannot be reduced in the prior art.
In order to achieve the above object, a first aspect of the embodiments of the present invention provides a discharge early warning device for a high voltage box of a motor train unit, including: the induction module and the discharge early warning module are arranged in a high-voltage box of the motor train unit;
the induction module is connected with the discharge early warning module and used for inducing an electric field signal in the high-voltage box and sending the electric field signal to the discharge early warning module;
the discharge early warning module is also connected with a power supply of the motor train unit and used for receiving the electric field signal and outputting an alarm signal when the level of the electric field signal is higher than that of the reference voltage.
As another embodiment of the present application, the sensing module includes an inductor, the inductor includes a sensing disc, a supporting frame, a nut, a first bolt, and a transmission cable;
the front surface of the induction disc is used for inducing electric field signals in the high-voltage box;
the support frame is arranged on the back of the induction disc and is used for being fixedly connected with a bottom plate in the high-pressure box;
the first bolt is arranged on the back face of the induction disc and used for fixing one end of the transmission cable through the matched nut, so that the electric field signal is transmitted through the connecting wire.
As another embodiment of the present application, the sensing plate is a circular plate with a convex surface on the front surface;
the material of the induction disc is aluminum.
As another embodiment of the present application, at least one through hole is formed in the support frame, and the through hole is used for fixedly connecting the support frame with a bottom plate in the high-pressure tank through a second bolt;
the support frame is made of an insulating material.
As another embodiment of the present application, the discharge early warning module includes a discharge early warning housing and a discharge early warning circuit disposed in the discharge early warning housing;
the discharge early warning circuit includes: the early warning device comprises a first connecting terminal, an early warning control chip, a capacitor C1, a resistor R1, a capacitor C2, a voltage conversion chip, a resistor R2, a relay, a light emitting diode and a second connecting terminal;
a first terminal of the first wiring terminal is connected with a voltage setting pin of the early warning control chip; a second terminal of the first connection terminal is grounded;
one end of the capacitor C1 and one end of the resistor R1 are respectively connected between the first terminal of the first connection terminal and a voltage setting pin of the early warning control chip; the other end of the capacitor C1 is connected with the second terminal of the first connection terminal and then grounded; the other end of the resistor R1 is connected with an analog signal ground pin of the early warning control chip; one end of the capacitor C2 is connected to the other end of the capacitor C1 and then grounded, and the other end of the capacitor C2 is connected to an external capacitor pin of the early warning control chip;
an analog signal power pin of the early warning control chip is connected with the voltage conversion chip and then is connected with a power input terminal of the second wiring terminal;
a voltage stabilizing output pin of the early warning control chip is connected with one end of the resistor R2 and one end of the relay;
an LED flicker driving pin of the early warning control chip is connected with an anode end of the light emitting diode, and a cathode end of the light emitting diode is connected with the other end of the resistor R2;
a high/low level logic output pin of the early warning control chip is connected with the other end of the relay;
the moving end of the normally open contact of the relay is connected with the normally open output terminal of the second wiring terminal;
the moving end of the normally closed contact of the relay is connected with the normally closed output terminal of the second wiring terminal;
the fixed end of the normally open contact of the relay is connected with the fixed end of the normally closed contact of the relay and then is connected with the positive power terminal of the second connecting terminal;
and the grounding terminal of the second wiring terminal is grounded.
As another embodiment of the present application, the discharge early warning circuit further includes: a capacitor C3, a fuse tube and a piezoresistor Y;
one end of the capacitor C3 is connected between an analog signal power supply pin of the early warning control chip and a voltage input pin of the voltage conversion chip, and the other end of the capacitor C3 is grounded;
one end of the fuse tube is connected with a voltage output pin of the voltage conversion chip, and the other end of the fuse tube is connected with a power supply input terminal of the second wiring terminal; the grounding end of the voltage conversion chip is grounded;
one end of the piezoresistor Y is connected between a voltage output pin of the voltage conversion chip and one end of the protective tube, and the other end of the piezoresistor Y is grounded.
As another embodiment of the present application, the early warning control chip includes: the circuit comprises a left comparator, a right comparator, a reference voltage generator, an oscillator, an inverter, a first triode, a resistor R3, a resistor R4, a second triode, a third triode and a fourth triode;
the positive input end of the left comparator is connected with the voltage setting pin of the early warning control chip, the negative input end of the left comparator is respectively connected with the output end of the reference voltage generator and the negative input end of the right comparator, and the output end of the left comparator is respectively connected with the first input end of the oscillator and the input end of the phase inverter;
the positive input end of the right comparator is connected with one end of the resistor R3 and one end of the resistor R4 and is vacant; the output end of the right comparator is connected with the base electrode of the second triode, the collector electrode of the second triode is connected with the collector electrode of the first triode and then is connected with the analog signal power supply pin of the early warning control chip, the emitter electrode of the second triode is connected with the base electrode of the first triode, the emitter electrode of the first triode is respectively connected with the voltage-stabilizing output pin of the early warning control chip and the other end of the resistor R3, and the other end of the resistor R4 is grounded;
the input end of the reference voltage generator is connected with the analog signal ground pin of the early warning control chip and then grounded;
a second input end of the oscillator is connected with an external capacitor pin of the early warning control chip, an output end of the oscillator is connected with a base electrode of the third triode, a collector electrode of the third triode is connected with an LED flicker driving pin of the early warning control chip, and an emitter electrode of the third triode is grounded;
the output end of the reverser is connected with the base electrode of the fourth triode, the collector electrode of the fourth triode is connected with the high/low level logic pin of the early warning control chip, and the emitter electrode of the fourth triode is grounded.
As another embodiment of the application, the discharge early warning housing comprises a housing main board, three mounting side plates and a third bolt;
the shell mainboard is used for arranging the discharge early warning circuit;
the three mounting side plates are respectively arranged at the left side, the right side and the lower end of the shell main plate, the left mounting side plate and the right mounting side plate are on the same plane with the shell main plate, the lower mounting side plate is perpendicular to the shell main plate, at least one mounting hole is formed in each of the left mounting side plate and the right mounting side plate, and a first wiring terminal mounting hole and a second wiring terminal mounting hole are respectively formed in each of the lower mounting side plates;
the third bolt is arranged on one side, deviating from the shell main board, of the lower end mounting side plate and is used for being grounded.
As another embodiment of this application, first binding post with the second binding post corresponds the setting and is in first binding post mounting hole and second binding post mounting hole, just first binding post's first terminal still passes through the other end of transmission cable is connected first bolt, EMUs earthing terminal is still connected to first binding post's second terminal.
A second aspect of an embodiment of the present invention provides a motor train unit, including: the high-voltage box discharge early warning device for the motor train unit is adopted.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: compared with the prior art, the motor train unit high-voltage box is internally provided with the induction module and the discharge early warning module which are connected through the transmission cable, so that the induction module can induce an electric field signal generated by abnormal discharge in the high-voltage box and transmit the electric field signal to the discharge early warning module through the transmission cable, the discharge early warning module compares the received electric field signal with the reference voltage and outputs the alarm signal when the level of the electric field signal is higher than that of the reference voltage, thereby finding out the fault of high-voltage electrical equipment in the high-voltage box in time, maintaining in time and improving the operation reliability of high-voltage components in the high-voltage box of the motor train unit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a discharge early warning device of a high-voltage box of a motor train unit provided by an embodiment of the invention;
FIG. 2 is a schematic view of a high pressure tank provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a sensing module according to an embodiment of the invention;
fig. 4 is an exemplary diagram of a discharge warning circuit provided in an embodiment of the present invention;
fig. 5 is a schematic diagram of an early warning control chip according to an embodiment of the present invention;
fig. 6 is a front view of a discharge early warning housing provided in an embodiment of the present invention;
fig. 7 is a bottom view of the discharge early warning housing according to the embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic diagram of a discharge early warning device for a high-voltage box of a motor train unit according to an embodiment of the present invention, and the discharge early warning device may include: the induction module 200 and the discharge early warning module 300 are arranged in the high-voltage box 100 of the motor train unit;
the induction module 200 is connected to the discharge early warning module 300, and is configured to induce an electric field signal in the high voltage tank 100 and send the electric field signal to the discharge early warning module 300;
the discharge early warning module 300 is configured to receive the electric field signal and output an alarm signal when the level of the electric field signal is higher than the level of the reference voltage.
In the present embodiment, as shown in fig. 2, a bottom insulating plate 101, a connecting plug 102, an earthing switch 103, a lightning arrester 104, an insulator bracket 105, a disconnector support 106, a disconnector switch 107, a first insulator 108, a second insulator 109, a voltage transformer 110, a third insulator 111, a main breaker 112, and a fourth insulator 113 are disposed in a high-voltage box 100, and the devices in the high-voltage box 100 are the same as those in the prior art and will not be described in detail in the present embodiment.
It should be noted that the sensing module 200 may be disposed at an intermediate position within the high voltage box 100 so that the electric field signal within the high voltage box 100 can be accurately measured, for example, the sensing module 200 may be disposed within the high voltage box 100 between the disconnecting switch 107 and the main breaker 112.
The discharge early warning module 300 may be disposed on a sidewall of the high voltage box 100, and may be disposed at an upper end or a lower end of the induction module 200 in order to reduce transmission cables used for connection between the induction module 200 and the discharge early warning module 300. In fig. 2, the discharge warning module 300 may be disposed on an upper sidewall inside the high voltage tank 100.
Optionally, as shown in fig. 3, the sensing module 200 includes an inductor, and the inductor includes a sensing plate 201, a supporting frame 202, a nut 203, a first bolt 204, and a transmission cable 205;
the front surface of the induction disc 201 is used for inducing an electric field signal in the high-voltage box;
the supporting frame 202 is arranged on the back of the induction disc 201 and is used for being fixedly connected with a bottom plate in the high-pressure box 100;
the first bolt 204 is disposed on the back of the inductive disc 201, and is used for fixing one end of the transmission cable 205 through the nut 203, so that the electric field signal is transmitted through the connection line.
As shown in fig. 3, the sensing plate 201 is a circular plate with a convex surface on the front surface;
the material of the induction disc 201 is aluminum.
Alternatively, the sensing plate 201 may have a diameter of 50mm and a thickness of 1.5 mm.
As shown in fig. 3, at least one through hole 206 is disposed on the supporting frame 202, and the through hole 206 is used for fixedly connecting the supporting frame 202 with a bottom plate in the high-pressure tank 100 through a second bolt;
the material of the support frame 202 is an insulating material.
It should be noted that, the bottom plate in the high-voltage box 100 is an insulating bottom plate, so that the support frame 202 isolates the sensing disc 201, the sensing disc 201 and the high-voltage box 100 are absolutely insulated from each other, and the measurement accuracy of the sensing module is improved.
Alternatively, the through hole 206 of the support 202 may be a circular hole with a diameter of 6 mm. In this embodiment, the number of through holes is not limited, and for example, two through holes, three through holes, or the like may be provided for stable connection.
Alternatively, the first bolt 204 may be an M4 bolt, which enables the sensing signal to be effectively transmitted through the transmission cable 205 after the flat washer and the spring washer are fastened to contact with the nut 203.
The corona discharge phenomenon is generated due to abnormal discharge of high-voltage equipment in the high-voltage box, and is a self-sustaining discharge electric field generated by the fact that the surface of a high-voltage component charged body is subjected to a local ionization excitation process in a gas medium and electrodes are not broken down or conducted, and the corona discharge phenomenon is generated near a large curvature before an air gap is completely broken down. The mechanism of corona discharge is a development process of gas breakdown in an electric field, initial electron collapse can only develop in a small range near a large-curvature electrode, and a streamer formed during discharge self-sustaining can not penetrate through the whole gap. At this time, although the discharge enters the self-sustaining stage, the ionization region is limited to a small range near the large curvature, so that the gap has not been broken down. After self-sustaining discharge is achieved, a thin purple halation layer appears only near large curvature, although the current is suddenly increased, the current is still small, and the gap is not broken down. The ampere-volt characteristic of corona discharge is increased, and as the voltage is increased, the corona layer is continuously enlarged, the corona current is increased, and the charge collection amount generated in the high-voltage box is increased. Therefore, the occurrence of the partial discharge phenomenon of each part in the high-voltage box can be sensed and predicted by monitoring the charge signal concentration intensity in the high-voltage box.
When the charge in the high-voltage box is gathered to a certain order of magnitude, an electric field is formed in the space of the high-voltage box. And sensing the electric field in the high-voltage box by using the sensing module, monitoring the change of the electric field in the space of the high-voltage box and identifying the change. The average field intensity in the high-voltage box is 150v/m in a normal state generally, the generation of an electric field is regular, when the electric field intensity rapidly increases to reach a set threshold value, an actual field intensity signal of the high-voltage box sensed by the sensing module is input into the discharging early warning module, an alarm signal is output when the level of the electric field signal is higher than that of a reference voltage, at the moment, the fact that the discharging phenomenon of components in the high-voltage box occurs is indicated, and timely treatment is needed so as to avoid accident expansion.
Optionally, the discharge early warning module 300 includes a discharge early warning housing 301 and a discharge early warning circuit 302 disposed in the discharge early warning housing 301;
as shown in fig. 4, the discharge early warning circuit 302 may include: the early warning device comprises a first wiring terminal X1, an early warning control chip U1, a capacitor C1, a resistor R1, a capacitor C2, a voltage conversion chip U2, a resistor R2, a relay KT, a light emitting diode LED and a second wiring terminal X2;
a first terminal of the first connection terminal X1 is connected with a voltage setting pin of the early warning control chip U1; a second terminal of the first connection terminal X1 is grounded.
One end of the capacitor C1 and one end of the resistor R1 are respectively connected between the first terminal of the first connection terminal X1 and the voltage setting pin of the early warning control chip U1; the other end of the capacitor C1 is connected with the second terminal of the first wiring terminal X1 and then grounded; the other end of the resistor R1 is connected with an analog signal ground pin of the early warning control chip U1; one end of the capacitor C2 is connected to the other end of the capacitor C1 and then grounded, and the other end of the capacitor C2 is connected to an external capacitor pin of the early warning control chip U1;
an analog signal power supply pin (namely a VCC pin) of the early warning control chip is connected with the voltage conversion chip U2 and then is connected with a power supply input terminal of the second wiring terminal X2;
a voltage-stabilizing voltage output pin of the early warning control chip U1 is connected with one end of the resistor R2 and one end of the relay;
an LED flicker driving pin of the early warning control chip U1 is connected with an anode end of the LED, and a cathode end of the LED is connected with the other end of the resistor R2;
a high/low comment logic output pin of the early warning control chip U1 is connected with the other end of the relay KT;
the moving end of a normally open contact of the relay KT is connected with a normally open output terminal of the second wiring terminal X2;
the moving end of the normally closed contact of the relay KT is connected with the normally closed output terminal of the second wiring terminal X2;
the fixed end of the normally open contact of the relay KT is connected with the fixed end of the normally closed contact of the relay KT and then is connected with the positive power terminal of the second wiring terminal X2;
the ground terminal of the second connection terminal X2 is grounded.
Optionally, as shown in fig. 4, the discharge early warning circuit 302 may further include: a capacitor C3, a fuse FU and a piezoresistor Y;
one end of the capacitor C3 is connected between an analog signal power supply pin of the early warning control chip U1 and a voltage input pin of the voltage conversion chip U2, and the other end of the capacitor C3 is grounded;
one end of the fuse FU is connected with a voltage output pin of the voltage conversion chip U2, and the other end of the fuse FU is connected with a power supply input terminal of the second wiring terminal X2; the grounding end of the voltage conversion chip U2 is grounded;
one end of the voltage dependent resistor Y is connected between a voltage output pin of the voltage conversion chip U2 and one end of the fuse FU, and the other end of the voltage dependent resistor Y is grounded.
In this embodiment, the safety tube FU mainly protects the discharge warning circuit to prevent the occurrence of overcurrent or short circuit from affecting the whole discharge warning circuit.
The piezoresistor Y1 is mainly used as a protection device for preventing the damage to the high-voltage box discharge early warning device of the motor train unit under the abnormal states of surge, overvoltage and the like of the DC110V power input by the power input terminal of the first wiring terminal X1.
Optionally, the power input by the power input terminal of the second connection terminal X2 is a power of DC110V that is connected via a host plug, and the voltage conversion chip U2 may convert the DC110V power input by the power input terminal of the second connection terminal X2 into a stable DC12V voltage, so as to provide a stable power for the early warning control chip.
Optionally, as shown in fig. 5, the early warning control chip U1 may include: a left comparator 51, a right comparator 52, a reference voltage generator 53, an oscillator 54, an inverter 55, a first transistor Q1, a resistor R3, a resistor R4, a second transistor Q2, a third transistor Q3, and a fourth transistor Q4;
a positive input end of the left comparator 51 is connected to the voltage setting pin of the warning control chip U1, negative input ends of the left comparator 51 are respectively connected to an output end of the reference voltage generator 53 and a negative input end of the right comparator 52, and output ends of the left comparator 51 are respectively connected to a first input end of the oscillator 54 and an input end of the inverter 55;
the positive input end of the right comparator 52 is connected with one end of the resistor R3 and one end of the resistor R4 and is vacant; the output end of the right comparator 52 is connected with the base of the second triode Q2, the collector of the second triode Q2 is connected with the collector of the first triode Q1 and then connected with the analog signal power pin of the early warning control chip U1, the emitter of the second triode Q2 is connected with the base of the first triode Q1, the emitter of the first triode Q1 is respectively connected with the regulated voltage output pin of the early warning control chip U1 and the other end of the resistor R3, and the other end of the resistor R4 is grounded;
the input end of the reference voltage generator 53 is connected with the analog signal ground pin of the early warning control chip U1 and then grounded;
a second input end of the oscillator 54 is connected to an external capacitor pin of the early warning control chip U1, an output end of the oscillator 54 is connected to a base of the third transistor Q3, a collector of the third transistor Q3 is connected to an LED flicker driving pin of the early warning control chip U1, and an emitter of the third transistor Q3 is grounded;
the output end of the inverter 55 is connected to the base of the fourth transistor Q4, the collector of the fourth transistor Q4 is connected to the high/low level logic output pin of the early warning control chip U1, and the emitter of the fourth transistor Q4 is grounded.
Optionally, an electric field signal sensed by the sensing module 200 is input to the positive input end of the left comparator 51 through a voltage setting pin of the early warning control chip U1 through a first pin of the first connection terminal X1, a reference voltage is input to the negative input end of the left comparator 51, when an input potential of the positive input end of the left comparator 51 is higher than the reference voltage, the left comparator 51 outputs a high level, an output of the left comparator 51 is divided into two paths, one path controls the oscillator 54 to stop oscillation, so that the output end of the oscillator 54 is the high level, a third triode Q3 of the driving circuit is in saturated conduction, an LED flicker driving pin of the early warning control chip U1 outputs a low level, so that the load is powered on to work, where the load is a light emitting diode LED, and a flicker prompt is performed; and the other path of the control signal is inverted by the phase inverter 55 and then outputs a low level to cut off the fourth triode Q4 of the driving circuit, a high/low level logic output pin of the early warning control chip U1 outputs a high level relay KT to be electrified, a normally open contact controlled by the relay KT is closed, and the normally closed contact is opened, so that the control signal is transmitted to a control end of the motor train unit through the second wiring terminal X2 to warn a driver to maintain in time.
When the input potential of the positive input end of the left comparator 51 is lower than the reference voltage, the left comparator 51 outputs a low level, the output end of the oscillator 54 is the low level, the third triode Q3 of the driving circuit is cut off, and the LED flicker driving pin of the early warning control chip U1 outputs a high level, so that the load does not work, wherein the load is a light emitting diode LED, and the light emitting diode does not work; and the other path outputs high level after being inverted by the phase inverter 55, so that the fourth triode Q4 of the driving circuit is in saturated conduction, a high/low level logic output pin of the early warning control chip U1 outputs a low level relay KT to lose power, and a normally open contact and a normally closed contact controlled by the relay KT are unchanged.
Optionally, as shown in fig. 6 and 7, fig. 6 is a front view of the discharge early warning housing, fig. 7 is a bottom view of the discharge early warning housing, and the discharge early warning housing 301 may include a housing main board 3011, three mounting side boards, and a third bolt 3012; the three mounting side plates are a left mounting side plate 3013, a right mounting side plate 3014 and a lower mounting side plate 3015;
the housing main board 3011 is used for setting the discharge early warning circuit 302;
the three mounting side plates are respectively arranged at the left side, the right side and the lower end of the shell main board 3011, the left mounting side plate 3013 and the right mounting side plate 3014 are on the same plane with the shell main board 3011, the lower mounting side plate 3015 is arranged perpendicular to the shell main board 3011, at least one mounting hole is arranged on the left mounting side plate 3013 and the right mounting side plate 3014, and a first wiring terminal mounting hole and a second wiring terminal mounting hole are respectively arranged on the lower mounting side plate 3015;
the third bolt 3012 is disposed on a side of the lower end mounting side plate 3015 away from the housing main board, and is configured to be grounded through a ground line.
The first wiring terminal X1 and the second wiring terminal X2 are correspondingly arranged in the first wiring terminal mounting hole and the second wiring terminal mounting hole, and the first terminal of the first wiring terminal X1 is further connected with the first bolt 204 through the other end of the transmission cable 205, so that an electric field signal sensed by the sensing module 200 is transmitted to the first wiring terminal X1 through the transmission cable 205, and then is input into the discharge early warning circuit 302 through the first terminal of the first wiring terminal X1. And the second terminal of the first wiring terminal X1 is also connected with a grounding end of the motor train unit.
The second terminal of the first connection terminal X1 can be connected to the high-voltage box housing to achieve connection to the ground terminal of the motor train unit.
The second connection terminal X2 is further connected to a control end of the motor train unit, and is not particularly limited in this embodiment.
Optionally, the housing main board 3011 may be an aluminum housing with a length of 75mm, a width of 55mm, and a height of 25 mm. Left side installation curb plate 3013, right side installation curb plate 3014 of the design of early warning device shell 301 both sides of discharging are the installation curb plate that the width is 10mm respectively, and the design has two diameters to be 5.5mm on every installation curb plate plane, and length is 8 mm's long circular port for arrange the pupil in with M5 bolt, installation plain washer and spring washer use the fixed to the high-voltage box 100 in of complex M5 nut with early warning device shell 301 of discharging.
The first terminal mounting hole and the second terminal mounting hole may be correspondingly disposed according to sizes of the first terminal and the second terminal, and sizes of the first terminal mounting hole and the second terminal mounting hole are not limited in this embodiment.
The third bolt 3012 may be a grounding bolt with a diameter of 5mm, and connects the discharge early warning circuit 300 with the high-voltage box 100 through a grounding wire, so that the discharge early warning circuit 300, the high-voltage box 100 and the motor train unit train body are always in equipotential connection.
According to the motor train unit high-voltage box discharge early warning device, the induction module and the discharge early warning module are arranged in the motor train unit high-voltage box and are connected through the transmission cable, so that the induction module can induce an electric field signal generated by abnormal discharge in the high-voltage box, the electric field signal is transmitted to the discharge early warning module through the transmission cable, the discharge early warning module compares the received electric field signal with the reference voltage, and an alarm signal is output when the level of the electric field signal is higher than that of the reference voltage, so that faults of high-voltage electrical equipment in the high-voltage box can be found in time, maintenance is carried out in time, and the operation reliability of high-voltage components in the motor train unit high-voltage box is improved.
The motor train unit further comprises a motor train unit, the motor train unit high-voltage box discharge early warning device in any one of the embodiments is adopted, and the motor train unit high-voltage box discharge early warning device in any one of the embodiments has the beneficial effects brought by the motor train unit high-voltage box discharge early warning device in any one of the embodiments.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a EMUs high-pressure tank early warning device that discharges which characterized in that includes: the induction module and the discharge early warning module are arranged in a high-voltage box of the motor train unit;
the induction module is connected with the discharge early warning module and used for inducing an electric field signal in the high-voltage box and sending the electric field signal to the discharge early warning module;
the discharge early warning module is also connected with a power supply of the motor train unit and used for receiving the electric field signal and outputting an alarm signal when the level of the electric field signal is higher than that of the reference voltage.
2. The high-voltage box discharge early warning device for the motor train unit according to claim 1, wherein the induction module comprises an inductor, and the inductor comprises an induction disc, a support frame, a nut, a first bolt and a transmission cable;
the front surface of the induction disc is used for inducing electric field signals in the high-voltage box;
the support frame is arranged on the back of the induction disc and is used for being fixedly connected with a bottom plate in the high-pressure box;
the first bolt is arranged on the back face of the induction disc and used for fixing one end of the transmission cable through the matched nut, so that the electric field signal is transmitted through the connecting wire.
3. The high-voltage box discharge early warning device of the motor train unit as claimed in claim 2, wherein the induction disc is a disc with a convex surface on the front surface;
the material of the induction disc is aluminum.
4. The high-voltage box discharge early warning device of the motor train unit as claimed in claim 2 or 3, wherein the support frame is provided with at least one through hole, and the through hole is used for fixedly connecting the support frame with a bottom plate in the high-voltage box through a second bolt;
the support frame is made of an insulating material.
5. The discharge early warning device for the high-voltage box of the motor train unit as claimed in claim 2, wherein the discharge early warning module comprises a discharge early warning housing and a discharge early warning circuit arranged in the discharge early warning housing;
the discharge early warning circuit includes: the early warning device comprises a first connecting terminal, an early warning control chip, a capacitor C1, a resistor R1, a capacitor C2, a voltage conversion chip, a resistor R2, a relay, a light emitting diode and a second connecting terminal;
a first terminal of the first wiring terminal is connected with a voltage setting pin of the early warning control chip; a second terminal of the first connection terminal is grounded;
one end of the capacitor C1 and one end of the resistor R1 are respectively connected between the first terminal of the first connection terminal and a voltage setting pin of the early warning control chip; the other end of the capacitor C1 is connected with the second terminal of the first connection terminal and then grounded; the other end of the resistor R1 is connected with an analog signal ground pin of the early warning control chip; one end of the capacitor C2 is connected to the other end of the capacitor C1 and then grounded, and the other end of the capacitor C2 is connected to an external capacitor pin of the early warning control chip;
an analog signal power pin of the early warning control chip is connected with the voltage conversion chip and then is connected with a power input terminal of the second wiring terminal;
a voltage stabilizing output pin of the early warning control chip is connected with one end of the resistor R2 and one end of the relay;
an LED flicker driving pin of the early warning control chip is connected with an anode end of the light emitting diode, and a cathode end of the light emitting diode is connected with the other end of the resistor R2;
a high/low level logic output pin of the early warning control chip is connected with the other end of the relay;
the moving end of the normally open contact of the relay is connected with the normally open output terminal of the second wiring terminal;
the moving end of the normally closed contact of the relay is connected with the normally closed output terminal of the second wiring terminal;
the fixed end of the normally open contact of the relay is connected with the fixed end of the normally closed contact of the relay and then is connected with the positive power terminal of the second connecting terminal;
and the grounding terminal of the second wiring terminal is grounded.
6. The discharge early warning device for the high-voltage box of the motor train unit according to claim 5, wherein the discharge early warning circuit further comprises: a capacitor C3, a fuse tube and a piezoresistor Y;
one end of the capacitor C3 is connected between an analog signal power supply pin of the early warning control chip and a voltage input pin of the voltage conversion chip, and the other end of the capacitor C3 is grounded;
one end of the fuse tube is connected with a voltage output pin of the voltage conversion chip, and the other end of the fuse tube is connected with a power supply input terminal of the second wiring terminal; the grounding end of the voltage conversion chip is grounded;
one end of the piezoresistor Y is connected between a voltage output pin of the voltage conversion chip and one end of the protective tube, and the other end of the piezoresistor Y is grounded.
7. The discharge early warning device for the high-voltage box of the motor train unit as claimed in claim 5, wherein the early warning control chip comprises: the circuit comprises a left comparator, a right comparator, a reference voltage generator, an oscillator, an inverter, a first triode, a resistor R3, a resistor R4, a second triode, a third triode and a fourth triode;
the positive input end of the left comparator is connected with the voltage setting pin of the early warning control chip, the negative input end of the left comparator is respectively connected with the output end of the reference voltage generator and the negative input end of the right comparator, and the output end of the left comparator is respectively connected with the first input end of the oscillator and the input end of the phase inverter;
the positive input end of the right comparator is connected with one end of the resistor R3 and one end of the resistor R4 and is vacant; the output end of the right comparator is connected with the base electrode of the second triode, the collector electrode of the second triode is connected with the collector electrode of the first triode and then is connected with the analog signal power supply pin of the early warning control chip, the emitter electrode of the second triode is connected with the base electrode of the first triode, the emitter electrode of the first triode is respectively connected with the voltage-stabilizing output pin of the early warning control chip and the other end of the resistor R3, and the other end of the resistor R4 is grounded;
the input end of the reference voltage generator is connected with the analog signal ground pin of the early warning control chip and then grounded;
a second input end of the oscillator is connected with an external capacitor pin of the early warning control chip, an output end of the oscillator is connected with a base electrode of the third triode, a collector electrode of the third triode is connected with an LED flicker driving pin of the early warning control chip, and an emitter electrode of the third triode is grounded;
the output end of the reverser is connected with the base electrode of the fourth triode, the collector electrode of the fourth triode is connected with the high/low level logic pin of the early warning control chip, and the emitter electrode of the fourth triode is grounded.
8. The discharge early warning device for the high-voltage box of the motor train unit as claimed in any one of claims 5 to 7, wherein the discharge early warning housing comprises a housing main plate, three mounting side plates and a third bolt;
the shell mainboard is used for arranging the discharge early warning circuit;
the three mounting side plates are respectively arranged at the left side, the right side and the lower end of the shell main plate, the left mounting side plate and the right mounting side plate are on the same plane with the shell main plate, the lower mounting side plate is perpendicular to the shell main plate, at least one mounting hole is formed in each of the left mounting side plate and the right mounting side plate, and a first wiring terminal mounting hole and a second wiring terminal mounting hole are respectively formed in each of the lower mounting side plates;
the third bolt is arranged on one side, deviating from the shell main board, of the lower end mounting side plate and is used for being grounded.
9. The high-voltage box discharge early warning device of the motor train unit according to claim 8,
the first wiring terminal and the second wiring terminal are correspondingly arranged in the first wiring terminal mounting hole and the second wiring terminal mounting hole, the first terminal of the first wiring terminal is connected with the first bolt through the other end of the transmission cable, and the second terminal of the first wiring terminal is connected with the grounding end of the motor train unit.
10. The motor train unit is characterized in that the motor train unit high-voltage box discharge early warning device as claimed in any one of claims 1 to 9 is adopted.
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| CN202110389708.0A CN113291350B (en) | 2021-04-12 | 2021-04-12 | EMUs high-pressure tank early warning device and EMUs that discharges |
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| CN202110389708.0A CN113291350B (en) | 2021-04-12 | 2021-04-12 | EMUs high-pressure tank early warning device and EMUs that discharges |
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| CN113291350B CN113291350B (en) | 2022-10-14 |
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| CN113291350B (en) | 2022-10-14 |
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