CN211959204U - Railway locomotive induction communication carrier wave trapper - Google Patents
Railway locomotive induction communication carrier wave trapper Download PDFInfo
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- CN211959204U CN211959204U CN202020780439.1U CN202020780439U CN211959204U CN 211959204 U CN211959204 U CN 211959204U CN 202020780439 U CN202020780439 U CN 202020780439U CN 211959204 U CN211959204 U CN 211959204U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides a railway locomotive induction communication carrier wave trapper, including trapper host computer, insulation board, composite insulator, binding post and installing support, the trapper host computer includes main coil unit, tuned circuit unit and protection component unit, and main coil unit, tuned circuit unit and protection component unit parallel connection constitute high frequency resonance circuit, power input terminal connection outside the trapper host computer is passed through to high frequency resonance circuit's one end is to the pantograph, power output terminal connection outside the high frequency resonance circuit's the other end passes through the trapper host computer is to the conducting rod, provides enough big high frequency equivalent impedance to ground for the carrier communication signal. The utility model discloses increase the equivalent high frequency impedance to ground on the electric power contact net, reduce the response communication signal shunt loss, block the transmission of response communication signal to non-communication direction, guaranteed the due signal strength of response communication signal effective transmission, improved the stability and the reliability of response communication signal transmission.
Description
Technical Field
The utility model belongs to the technical field of railway induction communication, particularly, relate to a railway locomotive induction communication carrier wave trapper.
Background
Railway induction communication is an important communication mode of railway wireless communication in weak wireless communication areas such as tunnels and mountainous areas, the railway induction communication is used for long-distance transmission of carrier signals through a 2.7 kilovolt electric power contact network, the problems that wireless signals are blocked and absorbed and the like due to adverse environmental conditions such as tunnels and mountainous areas are solved, the investment and construction cost is saved, the problem of field intensity coverage communication of the railway wireless communication weak area is effectively solved, the communication stability and reliability of the railway wireless communication in the weak area are improved, and stable and reliable wireless communication support is provided for works such as railway wireless train dispatching, cargo train tail safety protection, railway construction protection and reconnection locomotive joint control.
The electric power contact network cable is used as a waveguide transmission line of a wireless induction communication signal, so that the problem of field intensity coverage of wireless signal blind areas in mountainous areas and tunnels is solved. There are two more serious problems. Firstly, electric equipment such as a transformer, a switch and the like connected with an electric power contact network has stray capacitance to the ground, the electric power contact network has distributed capacitance, distributed inductance, distributed resistance and distributed conductance, and the impedances form equivalent impedance to high frequency to the ground and generate serious shunt loss to an induction communication signal; secondly, harmonic interference signals generated when a power supply system and electric equipment on the locomotive work are transmitted on the power contact network, and serious interference is caused to the induction communication signals. Particularly, in recent years, due to the rapid development of power semiconductors and the appearance of high-power alternating current, direct current and alternating current power variable frequency locomotives, an electric contact network is influenced by various interference sources, so that the inductive communication is more unreliable, even the communication cannot be realized, the train dispatching communication is influenced, and serious potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model aims to provide a railway locomotive induction communication carrier wave trapper and wave trapping method to overcome the defects in the prior art.
In order to achieve the purpose, the utility model provides a railway locomotive induction communication carrier wave trapper, which comprises a trapper host, an insulating plate, four composite insulators, a wiring terminal and a mounting bracket; the four composite insulators are fixedly connected to the mounting bracket, the insulating plate is fixedly connected to the top ends of the four composite insulators, the wave trap host is fixedly connected to the insulating plate, and the four composite insulators are connected with the wave trap host through the wiring terminals; the main coil unit, the tuning circuit unit and the protection element unit are connected in parallel, and the main coil unit and the tuning circuit unit form a high-frequency resonance circuit.
Through the technical scheme, the main coil unit, the tuning circuit unit and the protection element unit are connected in parallel to form the high-frequency resonance circuit, interference signals influencing communication are restrained in the frequency range of the induction communication channel, transmission of carrier signals to the non-transmission direction is prevented, shunt loss is reduced, harmonic interference signals generated by electric equipment on the locomotive are prevented from being transmitted to an electric power contact net, meanwhile, the resonance circuit has low impedance to power frequency current, and therefore normal conduction of the power frequency current is not influenced.
As a further explanation of the railway locomotive induction communication carrier wave trap of the present invention, preferably, the high frequency resonant circuit includes a main coil inductor, a tuning coil inductor, a first tuning capacitor, a second tuning capacitor, a resistor and a lightning arrester; the main coil inductor and the first tuning capacitor are connected in parallel to form first-order resonance; the tuning coil inductor, the second tuning capacitor and the resistor are connected in series to form second-order resonance, and the lightning arrester, the first-order resonance and the second-order resonance are connected in parallel; and the whole blocking bandwidth from the first-order resonance to the second-order resonance is +/-20 KHz so as to meet the offset of the central frequency in the effective bandwidth range of the carrier channel and under bad weather conditions.
Through the technical scheme, the high-frequency resonant circuit is composed of the first-order resonance and the second-order resonance two groups of LC tuned circuits, the bandwidth of a blocking frequency range is widened, and the deviation of the central frequency in a carrier channel effective bandwidth range and under bad weather conditions is met.
As right the railway locomotive induction communication carrier wave trapper of the utility model further explain, preferably, high frequency resonance circuit's one end is passed through the power input terminal connection outside the trapper main part to the pantograph, high frequency resonance circuit's the other end passes through the power output terminal connection outside the trapper main part to the conducting rod, for carrier communication signal provides enough big high frequency equivalent impedance to ground.
Through above-mentioned technical scheme, realize increasing the equivalent high frequency impedance to ground on the electric power contact net, block that the response communication signal transmits to the non-communication direction, realize effectual reduction response communication signal shunt loss, guaranteed the due signal strength of response communication signal effective transmission, realize the effective transmission of response communication signal on the electric power contact net, effectual stability and the reliability that improves the transmission of response communication signal.
As a further explanation of the railway locomotive induction communication carrier wave trap of the present invention, preferably, the main coil unit is a multi-layer winding group formed by winding a yarn-covered red copper flat wire in a single spiral manner, and a soft ferrite material is attached to a surface layer of the yarn-covered red copper flat wire.
Through the technical scheme, the inductor has the characteristics of smaller volume, lighter weight and the like under the same inductance, and the problems of temperature rise, magnetic saturation and the like of the main coil are effectively solved.
As right the railway locomotive induction communication carrier wave trapper of the utility model further explain, preferably, the main coil unit is radial multilayer structure, radial multilayer structure's turn-to-turn sets up the glass fiber cushion in order to reach insulating purpose, through dipping lacquer and thermosetting processing to form with the fixed preparation of high-pressure forceful electric power insulating board.
By the technical scheme, moisture resistance, high voltage resistance, good overall strength and flexible combinability are guaranteed, different rated current levels of the alternating current locomotive are met, and the alternating current locomotive can effectively conduct the power frequency current of the alternating current locomotive and prevent carrier signals from being transmitted in an unnecessary direction.
As a further explanation of the railway locomotive induction communication carrier wave trap of the present invention, preferably, the shell of the main machine of the wave trap is made of high voltage strong electric insulation board material made of phenolic resin and glass fiber as filling material.
Through above-mentioned technical scheme, realize having that the volume is littleer, light in weight and high voltage resistance's performance, have more security.
As a further description of the railway locomotive induction communication carrier wave trap of the present invention, preferably, the protection element unit is a standard high voltage discharger for protecting the main coil unit and the tuning circuit unit.
Through the technical scheme, the standard high-voltage discharger is used for protecting the functions of the main coil and the tuning circuit under various complex conditions such as atmospheric lightning or overvoltage operation.
As right the further explanation of the railway locomotive induction communication carrier wave trapper of the present invention, preferably, four composite insulators are epoxy composite insulators.
Through the technical scheme, the four composite insulators adopt the epoxy composite insulator, and the composite insulator has the characteristics of light total weight, good electrical performance and mechanical performance, long creepage distance and good pollution resistance.
As a further explanation of the railway locomotive induction communication carrier wave trap of the present invention, preferably, the insulation board fixes the main coil unit of the main body of the wave trap host and the protection case of the tuning circuit unit and forms a whole; one ends of the four composite insulators are used for supporting and fixing the wave trapper main machine and forming a high-voltage safety distance with the roof; the other end that the installing support passes through four composite insulator is fixed at the locomotive roof to fix through the high strength screw, so that maintain the installation and dismantle.
According to the technical scheme, the four composite insulators are adopted to support and fix the wave trap main machine, a high-voltage safety distance is formed between the four composite insulators and the roof, the insulation level of the wave trap main machine to the ground when the maximum working voltage of the wave trap main machine is 30KV is ensured, and the discharge risk of a locomotive is reduced; the arrangement form of four composite insulators can better and stably support the wave trap host machine on the roof of the locomotive, has better wind resistance strength, meets the requirement of high-speed operation of the electric locomotive, and prevents the pulverization of the connection contact surface of the insulators and the wave trap.
In order to achieve another object of the present invention, the present invention further provides a method for blocking wave of inductive communication carrier of railway locomotive, wherein the wave blocker of inductive communication carrier of railway locomotive is connected in series on a power supply loop between a pantograph assembly and a conducting rod on the roof of the railway locomotive to form a high frequency resonant circuit composed of a main coil unit and a tuning circuit unit; the high-frequency resonant circuit is characterized by comprising a high-frequency resonant circuit, wherein a primary coil inductor and a first tuning capacitor are connected in parallel to form a first-order resonance f1, and a tuning coil inductor, a second tuning capacitor and a resistor are connected in series to form a second-order resonance f 2; the resonance center frequency f is adjusted by adjusting the first tuning capacitor and the second tuning capacitor0So that the blocking impedance of the high-frequency resonance circuit at the center frequency is maximized to completely satisfy f0A communication signal interference signal rejection requirement of the inductive communication device of frequency; the high-frequency resonance circuit provides a sufficiently large high-frequency resistance to frequency points within a frequency band from f1 to f2, wherein: the bandwidth calculation formula is as follows:
B＝f2-f1＝3.14Kf02L/Rmin；
wherein L is the inductance of the main coil, RminTo minimum blocking resistance, f0For the resonant center frequency, K is an empirical correction factor, f0K is 0.85 at over 100KHz, f0K is 0.8 when the K is below 100 KHz; f. of0Is a frequency point in a 400KHz frequency band, and K is taken0.85。
Through the technical scheme, the method for installing the railway locomotive induction communication carrier wave trapper between the pantograph component and the conducting rod on the roof of the railway locomotive is adopted, the equivalent high-frequency impedance to the ground on the electric power contact network is increased, the induction communication signals are blocked from being transmitted to the non-communication direction, the shunt loss of the induction communication signals is effectively reduced, the due signal strength of the effective transmission of the induction communication signals is ensured, the effective transmission of the induction communication signals on the electric power contact network is realized, and the stability and the reliability of the transmission of the induction communication signals are effectively improved.
The utility model has the advantages that:
1. the utility model discloses a railway locomotive induction communication carrier wave trapper, including the main coil unit, tuned circuit unit and protection component unit parallel connection constitute high frequency resonance circuit, the interference signal who influences the communication has been suppressed in having realized the induction communication channel frequency range, realized preventing carrier signal to non-transmission direction transmission, reduce the reposition of redundant personnel loss, realized preventing harmonic interference signal transmission to the electric power contact net that consumer produced on the locomotive, resonant circuit is the low impedance to power frequency current simultaneously, consequently, do not influence power frequency current's normal conduction.
2. The utility model discloses a railway locomotive induction communication carrier wave trapper, through the method of installation railway locomotive induction communication carrier wave trapper between pantograph subassembly and the conducting rod at the railway locomotive roof, realized increasing the equivalent high frequency impedance to ground on the electric power contact net, block the transmission of induction communication signal to non-communication direction, effectual reduction induction communication signal shunt loss has been realized, the due signal strength of induction communication signal effective transmission has been guaranteed, the effective transmission of induction communication signal on the electric power contact net has been realized, the effectual stability and the reliability that improves induction communication signal transmission.
Drawings
Fig. 1 is a schematic structural diagram of the railway locomotive induction communication carrier wave trapper of the present invention.
FIG. 2 is a schematic diagram of a main body of a wave trap of the railway locomotive induction communication carrier wave trap of the present invention;
FIG. 3 is a schematic diagram of the circuit of the railway locomotive induction communication carrier wave trapper of the present invention;
FIG. 4 is a graph of the impedance frequency curve of the railway locomotive induction communication carrier wave trap of the present invention;
fig. 5 is a schematic view of the railway wireless induction communication system of the present invention.
Detailed Description
In order to further understand the structure, characteristics and other objects of the present invention, the following detailed description is given with reference to the accompanying preferred embodiments, which are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention.
Firstly, please refer to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a railway locomotive induction communication carrier wave trap of the present invention; fig. 2 is a schematic diagram of the wave trap host of the railway locomotive induction communication carrier wave trap of the present invention. As shown in figure 1, the utility model discloses a railway locomotive induction communication carrier wave damper, including damper host 1, insulation board 2, composite insulator 3, binding post and installing support 4, insulation board 2, four composite insulators 3, binding post and installing support 4 are a part of damper host 1, four composite insulators 3 are fixedly connected on installing support 4, installing support 4 is fixed on the locomotive roof through the other ends of four composite insulators 3, fix with high strength screw, it is convenient to maintain, install and dismantle, insulation board 2 is fixedly connected on the top of four composite insulators 3, damper host 1 is fixedly connected on insulation board 2, insulation board 2 is used for fixing the protective housing of damper host 1 and forming a whole, four composite insulators 3 are connected with damper host 1 through binding post, four composite insulators 3 support fixed damper host 1, and a certain high-voltage safety distance is formed between the main machine and the roof of the locomotive, so that the insulation level of the wave trap main machine 1 to the ground when the maximum working voltage is 30KV is ensured, and the discharge risk of the locomotive is reduced. In a word, the insulating plate 2, the four composite insulators 3 and the mounting bracket 4 play the roles of insulating, supporting and fixing the main machine of the wave trap, and the devices are made of materials with damp-proof, vibration-proof, impact-resistant and high-voltage-resistant strengths. The four composite insulators 3 are epoxy composite insulators, so that the electric locomotive has the characteristics of light total weight, good electrical performance and mechanical performance, long creepage distance and good pollution resistance, and the arrangement mode of the four composite insulators 3 can better stably support the wave trap host machine on the roof of the locomotive, so that the electric locomotive has better wind resistance strength, and meets the requirement of high-speed operation of the electric locomotive. The pulverization of the connection contact surface of the insulator and the wave trap is prevented.
As shown in fig. 2, the wave trap main machine 1 includes a main coil unit 11, a tuning circuit unit 12, and a protection element unit 13, the main coil unit 11, the tuning circuit unit 12, and the protection element unit 13 are connected in parallel, the main coil unit 11 and the tuning circuit unit 12 constitute a high-frequency resonance circuit, one end of the high-frequency resonance circuit is connected to the pantograph through a power input terminal outside the wave trap main machine 1, and the other end of the high-frequency resonance circuit is connected to the conductive rod through a power output terminal outside the wave trap main machine 1 to provide a sufficiently large high-frequency equivalent impedance to ground for the carrier communication signal.
In the structure, the main coil unit, the tuning circuit unit and the protection element unit are connected in parallel to form the high-frequency resonance circuit, so that a large enough ground high-frequency equivalent impedance is provided for a carrier communication signal, interference signals influencing communication are restrained in the frequency range of an induction communication channel, the carrier signal is prevented from being transmitted to a non-transmission direction, shunt loss is reduced, harmonic interference signals generated by electric equipment on a locomotive are prevented from being transmitted to an electric power contact net, and meanwhile, the resonance circuit has low impedance to power frequency current, so that normal conduction of the power frequency current is not influenced.
Preferably, the main coil unit 11 is a multi-layer winding group formed by winding a yarn-covered red copper flat wire in a single spiral manner, and a soft ferrite material is attached to the surface layer of the yarn-covered red copper flat wire, so that the main coil unit has the characteristics of smaller volume, lighter weight and the like under the same inductance value, and the problems of temperature rise, magnetic saturation and the like of the main coil are effectively solved. The main coil unit 11 is a radial multilayer structure, glass fiber cushion blocks are arranged between turns of the radial multilayer structure to achieve the purpose of insulation, and the radial multilayer structure is manufactured by dip coating and thermosetting treatment and fixing by high-voltage strong-current insulation plates, so that moisture resistance, high-voltage resistance, good overall strength and flexible assemblability are ensured, different rated current grades of an alternating current locomotive are met, and more effective conduction of the power frequency current of the alternating current locomotive and prevention of transmission of carrier signals to an unnecessary direction are realized. The shell of the wave trap main machine 1 is made of a high-voltage strong-current insulating plate material with phenolic resin and glass fiber as filling materials, so that the wave trap main machine has the advantages of smaller volume, light weight, high voltage resistance and higher safety. The protection element unit 13 is a standard high-voltage discharger for protecting the main coil unit 11 and the tuned circuit unit 12, and the standard high-voltage discharger is used for protecting the functions of the main coil and the tuned circuit under various complicated conditions such as atmospheric lightning or overvoltage operation.
As shown in fig. 3 and 4, the high-frequency resonant circuit includes a main coil inductor L1, a tuning coil inductor L2, a first tuning capacitor C1, a second tuning capacitor C2, a resistor R, and a lightning arrester BL; the main coil inductor L1 and the first tuning capacitor C1 are connected in parallel to form first-order resonance; the tuning coil inductor L2, the second tuning capacitor C2 and the resistor R are connected in series to form second-order resonance, and the lightning arrester BL, the first-order resonance and the second-order resonance are connected in parallel; and the whole blocking bandwidth from the first-order resonance to the second-order resonance is +/-20 KHz so as to meet the offset of the central frequency in the effective bandwidth range of the carrier channel and under bad weather conditions. On the basis of fully considering the electrical characteristics of the power contact network, the high-frequency resonant circuit based on the broadband tuning technology is composed of two groups of LC tuning circuits of first-order resonance and second-order resonance, the bandwidth of a blocking frequency range is widened, and the offset of the carrier channel to the center frequency within an effective bandwidth range and under bad weather conditions is met.
As shown in fig. 5, the present invention provides a method for blocking wave of inductive communication carrier wave of railway locomotive, wherein the inductive communication carrier wave blocker of railway locomotive is connected in series to a power supply loop between a pantograph assembly and a conducting rod on the roof of the railway locomotive, so as to form a high frequency resonance circuit composed of a main coil unit 11 and a tuning circuit unit 12; the high-frequency resonant circuit is characterized in that a primary coil inductor L1 and a first tuning capacitor C1 are connected in parallel to form a first-order resonance f1, and a tuning coil is used for the high-frequency resonant circuitThe inductor L2, the second tuning capacitor C2 and the resistor R are connected in series to form a second-order resonance f 2; the resonance center frequency f is adjusted by adjusting the first tuning capacitor C1 and the second tuning capacitor C20So that the blocking impedance of the high-frequency resonance circuit at the center frequency is maximized to completely satisfy f0The communication signal of the inductive communication device of frequency interferes with the signal rejection requirements.
The high-frequency resonant circuit provides enough high-frequency resistance for frequency points in the frequency band within the frequency bands from the first-order resonance f1 to the second-order resonance f2, and the bandwidth calculation formula is as follows: b-f 2-f 1-3.14 Kf02L/Rmin(ii) a Wherein L is the inductance of the main coil, RminTo minimum blocking resistance, f0For the resonant center frequency, K is an empirical correction factor, f0K is 0.85 at over 100KHz, f0K is 0.8 when the K is below 100 KHz; f. of0Is a frequency point in a 400KHz frequency band, and K is 0.85.
The railway power contact system has distributed capacitance, distributed inductance, distributed resistance and distributed conductance, transformer substations, pantograph and conducting rods on locomotive roofs, railway locomotive power supply systems, electric equipment and the like have stray capacitance to the ground, and a network formed by the equipment presents different high-frequency equivalent impedance to the ground for communication signals accessed at different frequencies and different positions. The input signal transmission path and the ground high-frequency equivalent impedance are equivalently connected in parallel, so the ground high-frequency equivalent impedance has the effect of parallel shunt on input signals, the signals in the channel are reduced, the ground high-frequency equivalent impedance is smaller, namely the shunt loss is more serious when the electric equipment connected to the electric power contact net is more, and conversely, the shunt loss is smaller when the ground high-frequency equivalent impedance is larger. The utility model discloses an install the method of railway locomotive induction communication carrier wave trapper between pantograph subassembly and the conducting rod at the railway locomotive roof, realize increasing the equivalent high frequency impedance to the ground of induction communication signal on the electric power contact net, effectively block induction communication signal and to the transmission of non-communication direction, realize the effectual induction communication signal shunt loss that reduces, and block various harmonic interference signal on the locomotive and spread to the electric power contact net, the due signal intensity of induction communication signal effective transmission has been guaranteed, realize the effective transmission of induction communication signal on the electric power contact net, the effectual stability and the reliability that improves induction communication signal transmission; meanwhile, harmonic interference signals generated by a power supply system and electric equipment on the locomotive are prevented from being transmitted on a contact network, an electrified section contact network is effectively purified, and a clean signal transmission channel is provided for railway wireless induction communication, so that the communication quality of a railway wireless induction communication system is effectively improved, stable and reliable railway wireless induction communication is realized, the problem of signal coverage of railway communication systems such as railway train dispatching and the like in weak field communication areas such as mountainous areas, tunnels and the like is effectively solved, the investment cost is saved, and the communication efficiency of the railway wireless communication is effectively improved.
The utility model discloses a railway locomotive induction communication carrier wave trapper has carried out static test on shenhua 7154 electric locomotive. The noise level of an induction channel interference signal in a certain section of a test railway field is 68dBuv for the Shenhua locomotive without anti-interference equipment; after the anti-interference equipment is installed, the noise level of the induction channel interference signal of a test field is reduced to 48dBuv, and the induction communication signal is improved by 20 dBuv. The signal level fed back to the train induction locomotive platform receiver by the retest fixed communication terminal is 72dBuv, the effective signal is 8dB higher than the requirement of the MSK receiving signal-to-noise ratio of the fixed communication terminal induction communication, and the strength requirement of the induction communication carrier signal is met. After the test of adding the locomotive for many times, the passing rate can reach more than 95 percent, the expected purpose is achieved, the interference signal influencing the communication is restrained in the frequency range of the induction communication channel, the transmission of the carrier signal to the non-transmission direction is prevented, the shunt loss is reduced, the transmission of the harmonic interference signal generated by the electric equipment on the locomotive to the electric contact net is prevented, meanwhile, the resonance circuit has low impedance to the power frequency current, therefore, normal conduction of power frequency current is not influenced, equivalent high-frequency impedance to the ground on the power contact network is increased, transmission of the induction communication signals to the non-communication direction is blocked, shunt loss of the induction communication signals is effectively reduced, due signal strength of effective transmission of the induction communication signals is guaranteed, effective transmission of the induction communication signals on the power contact network is achieved, and stability and reliability of transmission of the induction communication signals are effectively improved.
It should be noted that the above mentioned embodiments and embodiments are intended to demonstrate the practical application of the technical solution provided by the present invention, and should not be interpreted as limiting the scope of the present invention. Various modifications, equivalent substitutions and improvements will occur to those skilled in the art and are intended to be within the spirit and scope of the present invention. The protection scope of the present invention is subject to the appended claims.
Claims (9)
1. A railway locomotive induction communication carrier wave trapper is characterized by comprising a wave trapper host (1), an insulating plate (2), four composite insulators (3) and a mounting bracket (4); four composite insulator (3) fixed connection are on installing support (4), and insulation board (2) fixed connection is on four composite insulator (3) tops, and wave trapper host computer (1) fixed connection is on insulation board (2), wherein:
the main resistor unit (1) comprises a main coil unit (11), a tuning circuit unit (12) and a protection element unit (13), wherein the main coil unit (11), the tuning circuit unit (12) and the protection element unit (13) are connected in parallel, and the main coil unit (11) and the tuning circuit unit (12) form a high-frequency resonance circuit.
2. The railroad locomotive induction communication carrier wave trap of claim 1, wherein the high frequency resonant circuit comprises a primary coil inductance (L1), a tuned coil inductance (L2), a first tuning capacitance (C1), a second tuning capacitance (C2), a resistance (R), and a lightning arrestor (BL); wherein:
the main coil inductor (L1) and the first tuning capacitor (C1) are connected in parallel to form first-order resonance; the tuning coil inductor (L2), the second tuning capacitor (C2) and the resistor (R) are connected in series to form a second-order resonance, and the lightning arrester (BL), the first-order resonance and the second-order resonance are connected in parallel; and the whole blocking bandwidth from the first-order resonance to the second-order resonance is +/-20 KHz so as to meet the offset of the central frequency in the effective bandwidth range of the carrier channel and under bad weather conditions.
3. The railway locomotive induction communication carrier wave resistor as claimed in claim 1 or 2, wherein one end of the high-frequency resonance circuit is connected to the pantograph through a power input terminal (5) outside the main machine (1) of the wave resistor, and the other end of the high-frequency resonance circuit is connected to the conducting rod through a power output terminal (6) outside the main machine (1) of the wave resistor, so as to provide a sufficiently large high-frequency equivalent impedance to the ground for the carrier communication signal.
4. The railway locomotive induction communication carrier wave trap as claimed in claim 1, wherein the main coil unit (11) is a multi-layer winding group formed by winding a yarn-covered red copper flat wire in a single spiral type, and a soft ferrite material is attached to a surface layer of the yarn-covered red copper flat wire.
5. The railway locomotive induction communication carrier wave trap as claimed in claim 1, wherein the main coil unit (11) is a radial multi-layer structure, and glass fiber spacers are arranged between turns of the radial multi-layer structure for insulation purpose, and the radial multi-layer structure is manufactured by dipping paint and heat curing, and fixing by high-voltage strong electric insulation plates.
6. A railway locomotive induction communication carrier wave trap according to claim 1, characterized in that the outer shell (5) of the main unit (1) of the trap is made of high voltage electrical insulation board material of phenolic resin and glass fiber as filling material.
7. A railway locomotive induction communication carrier wave trap according to claim 1, characterized in that the protection element unit (13) is a standard high voltage discharger for protecting the main coil unit (11) and the tuned circuit unit (12).
8. A railway locomotive induction communication carrier wave trap according to claim 1, characterized in that the four composite insulators (3) are epoxy composite insulators.
9. A railway locomotive induction communication carrier wave trap according to claim 1, characterized in that the insulating plate (2) fixes and forms an integral body the main coil unit (11) of the trap main body (1) and the protective case of the tuned circuit unit (12);
one ends of the four composite insulators (3) are used for supporting and fixing the wave trap host (1) and forming a high-voltage safety distance with the roof, so that the insulation level of the wave trap host (1) to the ground when the maximum working voltage is 30KV is ensured, and the discharge risk of a locomotive is reduced;
the other end of the mounting bracket (4) through the four composite insulators (3) is fixed on the roof of the locomotive and is fixed through high-strength screws, so that the mounting bracket is convenient to maintain, mount and dismount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020780439.1U CN211959204U (en) | 2020-05-12 | 2020-05-12 | Railway locomotive induction communication carrier wave trapper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020780439.1U CN211959204U (en) | 2020-05-12 | 2020-05-12 | Railway locomotive induction communication carrier wave trapper |
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| CN211959204U true CN211959204U (en) | 2020-11-17 |
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| CN202020780439.1U Active CN211959204U (en) | 2020-05-12 | 2020-05-12 | Railway locomotive induction communication carrier wave trapper |
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