CN208971139U - A kind of signal isolating device of anti-electric railway traction reflux interference - Google Patents
A kind of signal isolating device of anti-electric railway traction reflux interference Download PDFInfo
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- CN208971139U CN208971139U CN201822049656.9U CN201822049656U CN208971139U CN 208971139 U CN208971139 U CN 208971139U CN 201822049656 U CN201822049656 U CN 201822049656U CN 208971139 U CN208971139 U CN 208971139U
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Abstract
The utility model discloses a kind of signal isolating devices of anti-electric railway traction reflux interference, including signal isolator, it further include non-linear protective device, non-linear protective device the inside of signal isolator is set and be connected on the cable end of signal isolator with reference between the earth, the breakdown voltage of non-linear protective device is higher than the maximum value of traction current induced voltage and is less than the isolation voltage value of signal isolator；Signal isolator is connected in side with equipment station by signal cable, is connected by signal cable with lightning protection device in the other side, and lightning protection device is connected by signal cable with the lightning protection device at next equipment station；The lightning protection device ground wire of lightning protection device is connected to the cable end of signal isolator with reference to ground and is connected with the earth by non-linear protection device.This signal isolating device can completely cut off traction current interference in normality, it will not influence the safeguard function of external lightning protection device in thunderstorm weather, and has the function of cutting traction current interference afterflow after thunder and lightning, the influence for efficiently solving traction current avoids the communication disruption problem between two equipment stations.
Description
Technical field
It is interfered the utility model relates to a kind of signal isolating device more particularly to a kind of anti-electric railway traction reflux
Signal isolating device.
Background technique
By the end of the year 2017, China's electric railway mileage has reached 8.7 ten thousand kilometers, when electric train is run, meeting
Very big electromagnetic interference is generated to equipment along the line, so that the electronic electric equipment along influencing, needs under normal conditions in signal
Cable both ends increase signal isolator to inhibit to interfere.
Signal isolator is a kind of signal isolating device, and input signal is passed through different transmitters, pick-up output isolation
Signal, make input signal, output signal, accomplish electrical isolation between power supply, to improve anti-dry in signals transmission
The equipment for disturbing ability.
The electric signal that common signal isolator will receive is adjusted by semiconductor devices convert first, then passes through light
Perhaps magnetic strength device carries out isolation conversion and finally carries out demodulation again switching back to the original signal before isolation or letter to isolator for sense
Linear transformation number has been carried out, while isolation processing is carried out to the power supply of signal after isolation, it is ensured that transformed signal, electricity
It is mutually isolated between source, the earth.
There are many electric railway spot jamming resource, while also to take into account lightning protection, and existing way is usually in long distance
Signal cable both ends from transmission increase full mould lightning protection device and signal isolator to carry out the compatible protection of comprehensive electromagnetic.China is electrical
Change railway power supply mode and generally use direct-furnish, electric propulsion BT power supply mode, electric propulsion AT power supply mode, direct-furnish mode is to edge
Line equipment causes very big interference.Electric propulsion AT power supply mode is the most common mode, although electric propulsion BT power supply mode,
Electric propulsion AT power supply mode can be very big interference of the containment traction current to equipment along the line, but due to two lines imbalance, still
There is relatively high common mode induced voltage on signal cable along so will lead to.And since the major part of signal cable transmission is all
Small signal, the corresponding lightning protection device used are also all minimum living shield voltage class, it is easy to be pulled the influence of reflux, cause
Lightning protection device acts when electric train passes through.And since the energy of the traction current high duration is long, gently then lead to two
Communication disruption between equipment station, it is serious directly to burn lightning protection device, cause to communicate between two stations and thoroughly interrupt.
Utility model content
In order to solve shortcoming present in above-mentioned technology, the utility model provides a kind of anti-electric railway traction
Flow back the signal isolating device interfered.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of anti-electric railway traction
Flow back the signal isolating device interfered, including signal isolator, it further includes non-linear protective device, and non-linear protective device is set
Set signal isolator inside and non-linear protective device be connected on the cable end of signal isolator with reference between the earth,
The breakdown voltage of non-linear protective device is higher than the maximum value of traction current induced voltage and is less than the isolation of signal isolator
Voltage value；
Signal isolator is connected in side with equipment station by signal cable, passes through signal cable and lightning protection in the other side
Device is connected, and lightning protection device is connected by signal cable with the lightning protection device at next equipment station；The lightning protection device ground wire of lightning protection device connects
The cable end of signal isolator is connected to reference to ground and is connected with the earth by non-linear protection device.
Further, non-linear protective device is made of varistor series connection gas-discharge tube, and varistor passes through conducting wire
The cable end of signal isolator is connected to reference to being located in, gas-discharge tube is connected with the earth by conducting wire.
Further, non-linear protective device is semiconductor discharge tube.
Further, non-linear protective device is Transient Suppression Diode.
Further, non-linear protective device is the air gap.
The utility model discloses a kind of signal isolating device of anti-electric railway traction reflux interference, thunder in order to prevent
Electricity and the simultaneous situation of traction current, caused communication are interrupted for a long time, and nonlinear device is after high voltage conduction, in thunder and lightning
Later have the function of cutting traction current interference afterflow, efficiently solve the influence of traction current, avoid two equipment stations
Between communication disruption problem.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1, equipment station；2, signal isolator；3, lightning protection device；4, signal cable；5, lightning protection device ground wire；6, cable end
With reference to ground；7, the earth；8, varistor；9, gas-discharge tube.
Specific embodiment
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
A kind of signal isolating device of anti-electric railway traction reflux interference as shown in Figure 1, including signal isolator
2, it further includes non-linear protective device, and the inside of signal isolator 2 and non-linear protector is arranged in non-linear protective device
Part is connected between the cable end reference ground 6 of signal isolator 2 and the earth 7, and the breakdown voltage of non-linear protective device, which is higher than, leads
It leads back the maximum value of stream induced voltage and is less than the isolation voltage value of signal isolator 2；Wherein, traction current induced voltage is most
The determination being worth greatly is according to different field conditions, as obtained by the measurement of the detecting instruments such as oscillograph；The isolation of signal isolator
Voltage value is the isolation voltage technical indicator of basis signal isolator design and determines.
Signal isolator 2 is connected with equipment station 1 in side by signal cable 4, the other side by signal cable 4 and
Lightning protection device 3 is connected, and lightning protection device 3 is connected by signal cable 4 with the lightning protection device at next equipment station, and so on, it is next
The lightning protection device at a equipment station is also connected with this signal isolation system；The lightning protection device ground wire 5 of lightning protection device 3 is connected to signal isolator 2
Cable end with reference to ground 6 and by non-linear protection device with greatly 7 connect.
Compared with the signal isolator of tradition setting, signal isolating device disclosed in this practical utility model has following
Feature:
1) signal isolating device not only includes signal isolator, signal isolator cable end with reference between the earth
It connects non-linear protection device, nonlinear device can be the electricity that afterflow is prevented composed by varistor series connection gas-discharge tube
Line structure is also possible to semiconductor discharge tube or Transient Suppression Diode (TVS) or the air gap.When non-linear protective device by
When the series connection gas-discharge tube 9 of varistor 8 forms, varistor 8 is referred to by the cable end that conducting wire is connected to signal isolator 2
At ground 6, gas-discharge tube 9 is connected by conducting wire with the earth 7.
2) inside of signal isolator is arranged in non-linear protection device, its breakdown voltage is greater than traction current interference electricity
The maximum value of pressure, less than the isolation voltage technical indicator of signal isolator.
3) cable end that the lightning protection device ground wire of lightning protection device is connected to signal isolator passes through non-linear protection device with reference to ground
Ground connection.
Since this signal isolating device has These characteristics, effectively prevents thunder and lightning and traction current while occurring
The case where, it avoids communication and interrupts for a long time.Nonlinear device has cutting traction current after high voltage conduction after thunder and lightning
Interfere the function of afterflow.Especially with the mode of thermistor series connection gas-discharge tube, so that pass through in electric train
When, completely cut off interference of the traction current induced voltage to signal, while lightning protection device will not act.
Also, since the breakdown voltage of non-linear protective device is less than the isolation voltage of signal isolator, when thunder and lightning occurs
When, non-linear protection device and lightning protection device inside the very high isolator of breakdown signal first of lightning voltage, access after breakdown
In low resistive state, interior side apparatus is protected not damaged by thunder and lightning.After thunder and lightning, nonlinear device cuts off traction current induction
Afterflow caused by electricity keeps communication recovery normal with being thus fully disconnected cable end reference with the electrical connection before the earth.
This signal isolator system has taken into account classical signal isolator to the anti-interference safeguard function of signal, while inhibiting traction current
Interference, and solve the problems, such as lightning protection with external lightning protection device perfect cooperation.
Below by taking certain high-speed rail route as an example, the utility model is described further.
Certain high-speed rail route is due to being to transform high-speed railway as using existing line, and grounding requirement is bad, and power supply mode also compares
Relatively fall behind, causes live traction current interference very big.It is learnt by in-site measurement, interference of the traction current on signal cable is super
200VAC is crossed, and interferes the energy generated huge, live siganl thunder-proof device is often burned out when crossing vehicle, is often gone out
Existing communication disruption.
Therefore, at the scene of this high-speed rail route, it is mounted with anti-electric railway traction reflux disclosed in the utility model
The signal isolating device of interference, perfectly solves the above problem, incudes on signal cable when bullet train passes through
Undertension is to puncture nonlinear device, and nonlinear device is also without leakage current, to completely cut off traction current interference；Work as thunder and lightning
When arriving, lightning voltage is high, and thunder and lightning punctures nonlinear device and siganl thunder-proof device, has dragged down common mode lightning voltage, thus
Signal isolator is protected not damage.By the test of live prolonged operation and thunderstorm season, this high-speed rail route does not have again
Situations such as occurring communication disruption, it was demonstrated that the signal isolating device of anti-electric railway traction reflux interference can solve well
Certainly live traction current bring interference, while will not influence siganl thunder-proof device to the lightning protected function of signal isolator.
Above embodiment is not limitations of the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made within the scope of the technical solution of the utility model,
Also the protection scope of the utility model is belonged to.
Claims (5)
1. a kind of signal isolating device of anti-electric railway traction reflux interference, including signal isolator (2), feature exists
In: it further includes non-linear protective device, and the inside in signal isolator (2) and non-linear protection is arranged in non-linear protective device
Devices in series is between the cable end reference ground (6) and the earth (7) of signal isolator (2), the breakdown potential of non-linear protective device
Pressure is higher than the maximum value of traction current induced voltage and is less than the isolation voltage value of signal isolator (2)；
The signal isolator (2) is connected with equipment station (1) in side by signal cable (4), passes through signal in the other side
Cable (4) is connected with lightning protection device (3), and lightning protection device (3) is connected by signal cable (4) with the lightning protection device at next equipment station
It connects；The lightning protection device ground wire (5) of the lightning protection device (3) is connected to the cable end of signal isolator (2) with reference to ground (6) and by non-thread
Property protection device with greatly (7) connect.
2. the signal isolating device of anti-electric railway traction reflux interference according to claim 1, it is characterised in that: institute
It states non-linear protective device to be made of varistor (8) series connection gas-discharge tube (9), varistor (8) is connected to by conducting wire
At the cable end reference ground (6) of signal isolator (2), gas-discharge tube (9) is connected by conducting wire with the earth (7).
3. the signal isolating device of anti-electric railway traction reflux interference according to claim 1, it is characterised in that: institute
Stating non-linear protective device is semiconductor discharge tube.
4. the signal isolating device of anti-electric railway traction reflux interference according to claim 1, it is characterised in that: institute
Stating non-linear protective device is Transient Suppression Diode.
5. the signal isolating device of anti-electric railway traction reflux interference according to claim 1, it is characterised in that: institute
Stating non-linear protective device is the air gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822049656.9U CN208971139U (en) | 2018-12-07 | 2018-12-07 | A kind of signal isolating device of anti-electric railway traction reflux interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822049656.9U CN208971139U (en) | 2018-12-07 | 2018-12-07 | A kind of signal isolating device of anti-electric railway traction reflux interference |
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| CN208971139U true CN208971139U (en) | 2019-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822049656.9U Active CN208971139U (en) | 2018-12-07 | 2018-12-07 | A kind of signal isolating device of anti-electric railway traction reflux interference |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510185A (en) * | 2018-12-07 | 2019-03-22 | 北京世纪瑞尔技术股份有限公司 | A kind of signal isolating device of anti-electric railway traction reflux interference |
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2018
- 2018-12-07 CN CN201822049656.9U patent/CN208971139U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510185A (en) * | 2018-12-07 | 2019-03-22 | 北京世纪瑞尔技术股份有限公司 | A kind of signal isolating device of anti-electric railway traction reflux interference |
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