CN114348047A - Direction switching attenuation redundant controller and contactless track circuit system - Google Patents
Direction switching attenuation redundant controller and contactless track circuit system Download PDFInfo
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Abstract
The invention provides a direction switching attenuation redundant controller and a contactless track circuit system, the direction switching attenuation redundant controller comprises: the direction switching relay adopts a small electronic safety relay; the direction switching relay is used for realizing direction switching and direction return detection of track circuit code sending. The direction switching attenuation redundant controller is internally provided with the direction switching circuit, adopts a small electronic safety relay, can be used for a non-contact track circuit system, has small volume, and saves the wiring cost, the cabinet cost and the maintenance cost. The relay fault is conveniently and rapidly positioned by arranging the return detection circuit, and the safety is high.
Description
Technical Field
The invention belongs to the technical field of rail transit, and particularly relates to a direction switching attenuation redundant controller and a contactless rail circuit system.
Background
At present, a direction switching relay (FQJ) in a track circuit mainly adopts a gravity relay, the quantity is large, and an independent combined rack is generally arranged for placement. As shown in fig. 1, the track circuit system includes an outdoor portion and an indoor portion. The outdoor part is mainly transmission cables. The indoor part comprises a cable terminating cabinet, a lightning protection analog network disk (modular network), a transmitter, a receiver, an attenuation redundancy controller and a track circuit communication interface board. The receiver and the transmitter are connected with the track circuit communication interface board through a CAN bus. The track circuit communication interface board is connected with the column control center through a CAN bus. The transmitter is used for transmitting the frequency shift signal, and the attenuation redundancy controller transmits the received frequency shift signal to the receiver. And the frequency shift signal from the transmitter to the attenuation redundancy controller is transmitted through the lightning protection analog network disk.
As shown in fig. 2, the transmitter, receiver and direction switching loss redundant controller (attenuators) are located in the frequency shift cabinet. A number of direction switch relays FQJ are provided in the combination cabinet and an analog network board is provided in the interface cabinet. The interface cabinet is connected with the combined cabinet through wiring, and the combined cabinet is connected with the frequency shift cabinet through wiring. The frequency shift cabinet is connected with the column control center through a CAN bus. And the train control center directly acquires the state of the relay in the combined cabinet. The conventional direction switching relay FQJ includes 8 sets of contacts, and in the direction switching circuit of each track circuit section, one set of contacts FQJ is used for the column control center to perform direction state acquisition. A column control center governs track circuit segments whose direction switching relays FQJ have one set of contacts connected in series as shown in fig. 3. When one group of the contacts has a contact fault, the FQJ contact of which track circuit section cannot be located in time, the fault recovery time is long, and the train transportation efficiency is influenced. That is, when the FQJ contact of any track segment fails, the entire circuit is broken, but it cannot be determined specifically which segment has a problem with FQJ.
The existing track circuit system has the following problems:
the system cost is high, and the purchase cost of a large number of relays accounts for 10% of the cost of the whole track circuit system;
the efficiency is low, an interlocking circuit formed by FQJ and the track relay GJ needs a plurality of groups of wires (including inter-cabinet wiring), the construction and maintenance efficiency is low, and the information transmission efficiency is also low;
the fault recovery time is long, and because the state of a plurality of direction switching relays connected in series is directly collected by the train control center, the contact fault of the relay contact can not be positioned in time.
Therefore, a convenient, economical and safe track circuit system implementation scheme is needed.
Disclosure of Invention
In view of the above problems, the present invention provides a direction switching attenuation redundancy controller, comprising: the direction of the relay is switched over,
the direction switching relay adopts a small electronic safety relay;
the direction switching relay is used for realizing direction switching and direction return detection of track circuit code sending.
Further, the direction switching droop redundancy controller comprises:
a direction switching circuit and a direction return detection circuit;
the direction switching circuit is used for realizing the direction switching;
the direction rechecking circuit is used for realizing the direction rechecking and comprises: collecting the direction state by checking the contact state of the direction switching relay;
the direction switching circuit and the direction return detection circuit are realized by commonly adopting a specified direction switching relay.
Further, the air conditioner is provided with a fan,
the direction switching relay comprises a first direction switching relay and a second direction switching relay;
each direction switching relay at least comprises five groups of contacts, wherein four groups of contacts are used for realizing a direction switching circuit, and the other group of contacts are used for realizing the direction return detection circuit.
Further, the air conditioner is provided with a fan,
the track circuit comprises a first lightning protection simulation network disk, a second lightning protection simulation network disk, a transmitter and a receiver, wherein the first lightning protection simulation network disk is connected with the second lightning protection simulation network disk;
the direction switching circuit is realized by the following modes:
the contacts of the first direction switching relay and the second direction switching relay are connected in a staggered mode, so that in a first state, the first direction switching relay is connected between the power amplifier output end of the transmitter and the first lightning protection simulation network disk, and the second direction switching relay is connected between the main track relay input end of the receiver and the second lightning protection simulation network disk; in the second state, the first direction switching relay is connected between the power amplifier output end of the transmitter and the second lightning protection simulation network disk, and the second direction switching relay is connected between the main track relay input end of the receiver and the first lightning protection simulation network disk.
Further, the air conditioner is provided with a fan,
and the third group of contacts of the first direction switching relay and the third group of contacts of the second direction switching relay are connected in series to form a direction return detection circuit.
Further, the air conditioner is provided with a fan,
the third group of connection points of the first direction switching relay and the third group of connection points of the second direction switching relay lead out two terminals which are respectively a first terminal and a second terminal of respective common points;
the third group of contacts of the second direction switching relay is connected with the normally closed points of the third group of contacts of the first direction switching relay through the first terminals of the common points of the third group of contacts;
the third group of contacts of the second direction switching relay is connected with the normally open point of the third group of contacts of the first direction switching relay through the second terminal of the common point of the third group of contacts;
a first terminal and a second terminal of a common point of a third group of contacts of the first direction switching relay are both connected with a power supply;
and the normally closed point and the normally open point of the third group of contacts of the second direction switching relay are respectively used for outputting a forward return detection signal and a reverse return detection signal, and the forward return detection signal and the reverse return detection signal are respectively fed back to the transmitter and the receiver.
Further, the air conditioner is provided with a fan,
the output end of the positive direction return detection signal is connected with a coil of the positive direction repeating relay, and the coil of the positive direction repeating relay is connected with a power supply;
the output end of the reverse return detection signal is connected with a coil of the reverse repeating relay, and the coil of the reverse repeating relay is connected with a power supply;
the forward direction repeating relay and the reverse direction repeating relay realize the switching of the forward direction adjusting resistance and the reverse direction adjusting resistance under the driving of the forward direction return detection signal and the reverse direction return detection signal.
Further, the air conditioner is provided with a fan,
the first, second, fourth and fifth sets of contacts of the first and second direction switching relays are used to implement a direction switching circuit.
The invention also provides a contactless track circuit system, and the direction switching attenuation redundant controller is provided.
Further, the system comprises: a transmitter, a receiver, a lightning protection simulation network disk and the direction switching attenuation redundancy controller,
the transmitter and the receiver are respectively connected with a direction switching attenuation redundant controller;
the direction switching attenuation redundant controller is connected with the lightning protection simulation network disc;
and the track circuit signal sent by the sender reaches the lightning protection simulation network disc through the direction switching attenuation redundant controller, is transmitted among the lightning protection simulation network discs, returns to the direction switching attenuation redundant controller, and is sent to the receiver by the direction switching attenuation redundant controller.
The direction switching attenuation redundant controller is internally provided with the direction switching circuit, adopts a small electronic safety relay, can be used for a non-contact track circuit system, has small volume, and saves the wiring cost, the cabinet cost and the maintenance cost. The relay fault can be found and positioned quickly and conveniently by arranging the return detection circuit, and the safety is high.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a schematic diagram of a track circuit system architecture according to the prior art;
FIG. 2 is a schematic diagram of a track circuit system cabinet and connection relationship according to the prior art;
FIG. 3 is a schematic diagram showing a track circuit system direction switching relay series relationship according to the prior art;
FIG. 4 is a schematic diagram illustrating an improved version of a contactless track circuit system according to an embodiment of the present invention;
FIG. 5 illustrates a schematic diagram of a contactless track circuitry configuration according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a circuit configuration of a direction-switching attenuation redundancy controller according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a direction-switching loss-attenuation redundant controller direction-loopback circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiments of the present invention provide a contactless track circuit system that eliminates independent gravity-type direction-switching relays, a rack, and related cabinet wiring, as shown in fig. 4. The frequency shift cabinet is provided with a transmitter, a direction switching attenuation redundant controller (attenuator) and a receiver, the interface cabinet is provided with a lightning protection simulation network panel (module network), the frequency shift cabinet is directly connected with the interface cabinet, and the frequency shift cabinet is connected with the column control center through a CAN bus.
As shown in fig. 5, a small-sized electronic safety relay is arranged in the direction switching attenuation redundant controller of the track circuit system to serve as a direction switching relay FQJ, and a direction return detection circuit is arranged to return the contact state of the small-sized electronic safety relay, namely, the contact state of FQJ is checked in real time, and the direction return detection circuit is also realized through the direction switching relay. The non-contact track circuit system of the embodiment of the invention cancels a gravity type relay and a combined frame thereof, thereby reducing the system cost; the small electronic safety relay is used as FQJ and is arranged in the track circuit equipment, so that the wiring design among cabinets is not needed during field construction, the construction efficiency is improved, and meanwhile, the wiring and the relay are not needed to be maintained during maintenance, and the maintenance cost is reduced; a direction return detection circuit of a small electronic safety relay is designed in the direction switching attenuation redundant controller, and when a contact of the small relay breaks down, the fault of specific equipment can be directly positioned; meanwhile, the relay is placed in the direction switching attenuation redundant controller, so that the train control center does not directly collect FQJ states any more, but sends FQJ states to the train control center in a communication coding mode through a track circuit, and the problem that positioning cannot be carried out after multiple groups of contacts are connected in series is solved.
Illustratively, as shown in fig. 5, the contactless track circuit system of the embodiment of the present invention mainly includes a transceiver device, a direction switching attenuation redundancy controller, and a lightning protection analog network disk. The transceiver device includes a transmitter and a receiver for transmitting and receiving track circuit signals, respectively, over the lightning protection analog network disk. Wherein the track circuit signal comprises a frequency shift signal. The direction switching attenuation redundant controller adopts the direction switching attenuation redundant controller of the embodiment of the invention.
The direction switching attenuation redundant controller is arranged between the transceiver and the lightning protection simulation network disc, the transmitter and the receiver are both connected with the direction switching attenuation redundant controller, and the direction switching attenuation redundant controller is connected with the lightning protection simulation network disc. The lightning protection simulation network disk comprises a first lightning protection simulation network disk and a second lightning protection simulation network disk, and the first lightning protection simulation network disk is connected with the second lightning protection simulation network disk. The track circuit signals sent by the sender reach the lightning protection simulation network discs (the first lightning protection simulation network disc or the second lightning protection simulation network disc) through the direction switching attenuation redundancy controller, are transmitted among the lightning protection simulation network discs, return to the direction switching attenuation redundancy controller, and are sent to the receiver through the direction switching attenuation redundancy controller. The first lightning protection simulation network disk and the second lightning protection simulation network disk are respectively coupled to two ends of the steel rail. The transmission direction of the track circuit signal between the first lightning protection simulation network disk and the second lightning protection simulation network disk (from the first lightning protection simulation network disk to the second lightning protection simulation network disk or from the second lightning protection simulation network disk to the first lightning protection simulation network disk) is the transmission direction of the track circuit signal on the steel rail. The transmission direction of the track circuit signal between the first lightning protection simulation network disk and the second lightning protection simulation network disk is controlled by a direction switching attenuation redundant controller, and particularly, is controlled by a direction switching circuit (including a direction switching relay FQJ) arranged in the direction switching attenuation redundant controller.
Furthermore, the contactless track circuit system also comprises a track circuit communication interface board and a cable terminating connection cabinet.
The track circuit communication interface board is connected to the column control center through CAN buses (CAN A, CAN B), and the column control center sends a direction switching command and receives direction state information through the track circuit communication interface board. The direction switching command is used for controlling the code sending direction of the track circuit through the direction switching relay FQJ, and the direction state information is the execution state of the direction switching command, namely the direction state, and is realized by acquiring the contact state of the direction switching relay. The transmitter is connected with the track circuit communication interface board through the CAN bus and used for receiving the direction switching command and the driving coding information issued by the column control center. And the transmitter generates a modulation frequency shift signal with the coding information according to the coding information and transmits the modulation frequency shift signal to the first lightning protection simulation network disk or the second lightning protection simulation network disk. The frequency shift signal is transmitted to the indoor direction switching attenuation redundant controller from the first lightning protection simulation network disc through the outdoor cable and the steel rail and is sent to the second lightning protection simulation network disc through the direction switching attenuation redundant controller, or the frequency shift signal is sent to the first lightning protection simulation network disc from the second lightning protection simulation network disc through the direction switching attenuation redundant controller. The second lightning protection simulation network disk or the first lightning protection simulation network disk sends the frequency shift signal to the direction switching attenuation redundant controller, and the direction switching attenuation redundant controller processes the frequency shift signal and then sends the frequency shift signal to the receiver. And after demodulating the frequency shift signal, the receiver drives the track relay according to relevant logic, and sends the state of the track relay to the train control center through the CAN bus and the track circuit communication interface board.
The cable terminating cabinet is used for connecting the lightning protection simulation network disc with an outdoor transmission cable.
The circuit structure and the direction control workflow of the direction switching loss-reduction redundant controller are described in detail below.
As shown in fig. 6, the direction switching loss redundant controller, i.e., the direction switching loss redundant controller, includes a direction switching circuit and a direction return detection circuit. A small-sized electronic safety relay is provided as the direction switching relay FQJ in the direction switching loss redundant controller. The small electronic safety relay has five groups of contacts and is used for realizing a direction switching circuit and a direction return detection circuit. The direction switching circuit comprises a first group of contact points, a second group of contact points, a fourth group of contact points and a fifth group of contact points. The direction rechecking circuit comprises a third group of contacts for collecting the contact state of the small electronic safety relay, transmitting the direction state to the transmitter and the receiver and transmitting the direction state to the column control center through the communication interface disc. Meanwhile, the direction return detection circuit also realizes the contact fault alarm of the small-sized electronic safety relay, and when the contact of the small-sized electronic safety relay has a fault and the direction cannot be switched, the fault of the small-sized electronic safety relay applied to the specified section can be timely positioned. The designated section is a track circuit section and comprises a transmitter, a receiver and two lightning protection simulation network disks at a transmitting end and a receiving end.
Specifically, two direction switching relays FQJ, including a first direction switching relay FQJ1 and a second direction switching relay FQJ2, are arranged in the direction switching attenuation redundant controller, and are small electronic safety relays.
The contacts of the first direction switching relay FQJ1 and the second direction switching relay FQJ2 are connected alternately to form an X-shaped line. So that: in the first state, the first direction switching relay FQJ1 is connected between the transmitter power amplifier output (S1, S2) and the first lightning protection analog network disk. A second direction switch relay FQJ2 is connected between the receiver's main rail relay inputs (main rail 1, main rail 2) and the second lightning protection analog network pad. In the second state, the first direction switching relay FQJ1 is connected between the transmitter power amplifier output (S1, S2) and the second lightning protection analog network disk. The second direction switch relay FQJ2 is connected between the receiver's main rail relay inputs (main rail 1, main rail 2) and the first lightning protection analog network pad. Wherein the first state and the second state are switched by the action of the direction switching relay, as will be described in detail below.
Specifically, a first group of contacts (contact 1) of the first direction switching relay FQJ1 is connected to the positive power amplifier output terminal S1 of the transmitter through a common point, a second group of contacts (contact 2) of the first direction switching relay FQJ1 is connected to the negative power amplifier output terminal S2 of the transmitter through a common point, and a fourth group of contacts (contact 4) and a fifth group of contacts (contact 5) of the first direction switching relay FQJ1 are respectively connected to the first lightning protection analog network panel through a common point.
A first group of contacts (contact 1) of the second direction switching relay FQJ2 is connected with the first main rail relay input end-main rail 1 through a common point, a second group of contacts (contact 2) of the second direction switching relay FQJ2 is connected with the second main rail relay input end-main rail 2 through a common point, and a fourth group of contacts (contact 4) and a fifth group of contacts (contact 5) of the second direction switching relay FQJ2 are respectively connected with the second lightning protection analog network panel through a common point.
The first set of contacts of first direction switching relay FQJ1 is connected to the normally closed point of its fourth set of contacts through a normally closed point; the second set of contacts of first direction switching relay FQJ1 is connected to the normally closed point of its fifth set of contacts through normally closed points. The first set of contacts of the second direction switching relay FQJ2 is connected to the normally closed point of its fourth set of contacts through a normally closed point; the second set of contacts of second direction switching relay FQJ2 is connected to the normally closed point of its fifth set of contacts through normally closed points.
The first set of contacts of the first direction switching relay FQJ1 is connected with the normally open point of the fourth set of contacts of the second direction switching relay FQJ2 through the normally open point; the second group of contacts of the first direction switching relay FQJ1 is connected with the normally open point of the fifth group of contacts of the second direction switching relay FQJ2 through the normally open point; the fourth group of contacts of the first direction switching relay FQJ1 is connected with the normally open point of the first group of contacts of the second direction switching relay FQJ2 through the normally open point; the fifth set of contacts of the first direction switching relay FQJ1 is connected to the normally open point of the second set of contacts of the second direction switching relay FQJ2 through a normally open point.
The transmitters are arranged redundantly, and the contactless track circuit system comprises a main transmitter and a standby transmitter. The coils (circles in the drawing) of the first direction switching relay FQJ1 are connected to the main transmitter and the standby transmitter, respectively. The coils (circles in the drawing) of the second direction switching relay FQJ2 are connected to the main transmitter and the backup transmitter, respectively. The main transmitter leads out a main transmitter anode power amplifier output end (ZS1) and a main transmitter cathode power amplifier output end (ZS2), and the spare transmitter leads out a spare transmitter anode power amplifier output end (BS1) and a spare transmitter cathode power amplifier output end (BS 2). The main transmitter positive power amplifier output end (ZS1) and the standby transmitter positive power amplifier output end (BS1) are connected through one group of connection points of a main transmitting alarm relay ZFBJ to form a positive power amplifier output end S1, and the main transmitter negative power amplifier output end (ZS2) and the standby transmitter negative power amplifier output end (BS2) are connected through the other group of connection points of the main transmitting alarm relay ZFBJ to form a negative power amplifier output end S2. And the anode power amplifier output end (BS1) of the standby transmitter and the cathode power amplifier output end (BS2) of the standby transmitter are also respectively connected with a standby transmission alarm relay BFBJ (connected with different contact groups of the BFBJ). Wherein, X (1)/X (2) is the carrier frequency type of the small track signal, and is determined according to the forward direction or the reverse direction.
As shown in fig. 7, the third group of contact points (contact point 3) of the first direction switching relay FQJ1 and the third group of contact points (contact point 3 of FQJ 2) of the second direction switching relay FQJ2 are connected in series to form a direction return detection circuit for realizing the direction return detection and driving the forward direction relay ZFJF and the reverse direction relay FFJF.
The third group of contacts of the first direction switching relay FQJ1 and the third group of contacts of the second direction switching relay FQJ2 lead out two terminals, respectively, which are the first terminal and the second terminal of the common point.
The third group of contacts of the second direction switching relay FQJ2 is connected to the normally closed points of the third group of contacts of the first direction switching relay FQJ1 through the first terminal of the common point thereof, and the third group of contacts of the second direction switching relay FQJ2 is connected to the normally open points of the third group of contacts of the first direction switching relay FQJ1 through the second terminal of the common point thereof. The first terminal and the second terminal of the common point of the third group of contacts of the first direction switching relay FQJ1 are respectively connected to a 24V power supply (G24). The normally closed point and the normally open point of the third set of contacts of the second direction switching relay FQJ2 are used to output the forward return detection signal and the reverse return detection signal, respectively. The forward echo signal and the reverse echo signal are fed back to the transmitter and the receiver, respectively. The directional state is determined by the forward echo signal and the reverse echo signal.
The output end of the forward return detection signal is connected with a coil of the forward repeating relay ZJF, the coil of the forward repeating relay ZJF is also connected with a 24V power supply (024), the output end of the reverse return detection signal is connected with a coil of the reverse repeating relay FFJF, and the coil of the reverse repeating relay FFJF is also connected with a 24V power supply (024). The forward direction repeating relay ZFJF and the reverse direction repeating relay FFJF respectively realize the switching of the forward direction adjusting resistance and the reverse direction adjusting resistance under the driving of the forward direction return detection signal and the reverse direction return detection signal.
The small orbit relay input of the receiver includes a first small orbit relay input (small orbit 1) and a second small orbit relay input (small orbit 2). Track circuit signals of the transmitter pass through the input ends (a small track 1 and a small track 2) of the small track relay and the input ends (a main track 1 and a main track 2) of the main track relay, which are respectively input by the direction switching circuit. The forward adjusting resistor, the reverse adjusting resistor, the forward direction repeating relay ZFJF and the reverse direction repeating relay FFJF are connected to a first small-track relay input end (small track 1) of the receiver.
Specifically, a forward adjusting resistor, a first group of junction points of a reverse direction repeating relay FFJF and a first group of junction points of a forward direction repeating relay ZJF are sequentially connected in series to form a forward adjusting branch; and the reverse adjusting resistor, the second group of contacts of the reverse direction repeating relay FFJF and the first group of contacts of the forward direction repeating relay ZJF are sequentially connected in series to form a reverse adjusting branch circuit. After the forward adjusting branch and the reverse adjusting branch are connected in parallel, one end of the forward adjusting branch is connected to the input end of the first small orbit relay, and the other end of the forward adjusting branch is connected to the common point of the first group of contacts of the second direction switching relay FQJ2 through the first group of contacts of the forward direction repeating relay ZJF. Specifically, on the forward direction adjusting branch, a forward direction adjusting resistor, a normal closing point of a first group of contacts of the reverse direction repeating relay FFJF, a common point of a first group of contacts of the reverse direction repeating relay FFJF, a normal closing point of a first group of contacts of the forward direction repeating relay ZJF and a common point of a first group of contacts of the forward direction repeating relay ZJF are sequentially arranged; on the reverse adjustment branch, a reverse adjustment resistor, a common point of a second group of contacts of the reverse direction repeating relay FFJF, a normally open point of the second group of contacts of the reverse direction repeating relay FFJF, a normally open point of a first group of contacts of the forward direction repeating relay ZJF are sequentially arranged, and the common point of the first group of contacts of the forward direction repeating relay ZJF is connected with the common point of the first group of contacts of the second direction switching relay FQJ 2.
The terms "first", "second", "third", and the like in the embodiments of the present invention are used only for distinguishing different devices or contacts, and are not intended to play a specific limiting role.
Through the direction switching attenuation redundant controller structure of the embodiment of the invention, the communication mode of the track circuit direction circuit and the train control is improved, the original train control directly drives the external direction switching relay FQJ to change and acquire the state of the external direction switching relay FQJ to obtain the direction state, the original train control directly communicates with the track circuit transmitter through CAN, the transmitter drives the small electronic safety relay, and the direction state is fed back to the train control. The specific working process is as follows:
(1) after receiving the section direction information sent by the column control center from the communication bus, the main transmitter and the standby transmitter respectively output a path of driving power supply signal to drive the 2 small electronic safety relays FQJ1 and FQJ2 in parallel. Each of the electronic safety relays FQJ1, FQJ2 has 5 sets of contacts: the contacts 1, 2, 4 and 5 complete direction switching to exchange signals of a transmitting end and a receiving end; the contact 3 completes the direction return detection and drives the forward direction repeating relay ZFJF and the reverse direction repeating relay FFJF to realize the switching of the forward direction adjusting resistance and the reverse direction adjusting resistance.
In the positive direction: FQJ1 ↓, FQJ2 ↓, ZFJF ↓, FFJF ↓;
in the reverse direction, FQJ1 ↓, FQJ2 ↓, ZFJF ↓, FFJF ↓andFFJF ↓.
"↓" indicates that the relay falls, which is the normal state of the small-sized electronic safety relay in the embodiment of the present invention, and "×" indicates that the relay is sucked up.
Fig. 6 shows a direction switching circuit state in the forward direction. FQJ1, and FQJ2, are both dropped (multiple sets of contacts for each relay are simultaneously dropped or sucked up), and the contacts of each set of contacts are brought into contact with a normally closed point. The track circuit signal sent by the transmitter is transmitted in the forward direction: the lightning protection network simulation disk is transmitted to the second lightning protection network simulation disk through the first lightning protection network simulation disk after passing through the first group of FQJ1 joints and the fourth group of FQJ1 joints, and then the lightning protection network simulation disk reaches a receiver through the fourth group of FQJ2 joints and the first group of FQJ2 joints. The signal at the end of S2 is in the same direction as S1. FQJ1 and FQJ2 are normally closed and output a positive return signal. At this time, if FQJ1 or FQJ2 fails, the relay contact cannot drop, and the forward return detection signal cannot be output, so that it is determined that FQJ1 or FQJ2 has failed. When the direction is reversed, the principle is the same, FQJ1 and FQJ2 suck up, and the contacts are in contact with the normally open point. The track circuit signal outputted from the transmitter is inputted to the receiver after passing through the first group of contacts FQJ1, the fourth group of contacts FQJ2, the second analog network disk, the first analog network disk, the fourth group of contacts FQJ1 and the first group of contacts FQJ2 in sequence. FQJ1 and FQJ2, and the contact point contacts with the normally open point to output reverse return detection signal.
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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A direction-switching droop redundant controller, comprising: the direction of the relay is switched over,
the direction switching relay adopts a small electronic safety relay;
the direction switching relay is used for realizing direction switching and direction return detection of track circuit code sending.
2. The direction-switching attenuation redundancy controller of claim 1, comprising:
a direction switching circuit and a direction return detection circuit;
the direction switching circuit is used for realizing the direction switching;
the direction rechecking circuit is used for realizing the direction rechecking and comprises: collecting the direction state by checking the contact state of the direction switching relay;
the direction switching circuit and the direction return detection circuit are realized by commonly adopting a specified direction switching relay.
3. The direction-switching loss-reduction redundant controller of claim 2,
the direction switching relay comprises a first direction switching relay and a second direction switching relay;
each direction switching relay at least comprises five groups of contacts, wherein four groups of contacts are used for realizing a direction switching circuit, and the other group of contacts are used for realizing the direction return detection circuit.
4. The direction-switching loss-reduction redundant controller of claim 3,
the track circuit comprises a first lightning protection simulation network disk, a second lightning protection simulation network disk, a transmitter and a receiver, wherein the first lightning protection simulation network disk is connected with the second lightning protection simulation network disk;
the direction switching circuit is realized by the following modes:
the contacts of the first direction switching relay and the second direction switching relay are connected in a staggered mode, so that in a first state, the first direction switching relay is connected between the power amplifier output end of the transmitter and the first lightning protection simulation network disk, and the second direction switching relay is connected between the main track relay input end of the receiver and the second lightning protection simulation network disk; in the second state, the first direction switching relay is connected between the power amplifier output end of the transmitter and the second lightning protection simulation network disk, and the second direction switching relay is connected between the main track relay input end of the receiver and the first lightning protection simulation network disk.
5. The direction-switching loss-reduction redundant controller of claim 3 or 4,
and the third group of contacts of the first direction switching relay and the third group of contacts of the second direction switching relay are connected in series to form a direction return detection circuit.
6. The direction-switching loss-reduction redundant controller of claim 5,
the third group of connection points of the first direction switching relay and the third group of connection points of the second direction switching relay lead out two terminals which are respectively a first terminal and a second terminal of respective common points;
the third group of contacts of the second direction switching relay is connected with the normally closed points of the third group of contacts of the first direction switching relay through the first terminals of the common points of the third group of contacts;
the third group of contacts of the second direction switching relay is connected with the normally open point of the third group of contacts of the first direction switching relay through the second terminal of the common point of the third group of contacts;
a first terminal and a second terminal of a common point of a third group of contacts of the first direction switching relay are both connected with a power supply;
and the normally closed point and the normally open point of the third group of contacts of the second direction switching relay are respectively used for outputting a forward return detection signal and a reverse return detection signal, and the forward return detection signal and the reverse return detection signal are respectively fed back to the transmitter and the receiver.
7. The direction-switching loss-reduction redundant controller of claim 6,
the output end of the positive direction return detection signal is connected with a coil of the positive direction repeating relay, and the coil of the positive direction repeating relay is connected with a power supply;
the output end of the reverse return detection signal is connected with a coil of the reverse repeating relay, and the coil of the reverse repeating relay is connected with a power supply;
the forward direction repeating relay and the reverse direction repeating relay realize the switching of the forward direction adjusting resistance and the reverse direction adjusting resistance under the driving of the forward direction return detection signal and the reverse direction return detection signal.
8. The direction-switching loss-reduction redundant controller of claim 4,
the first, second, fourth and fifth sets of contacts of the first and second direction switching relays are used to implement a direction switching circuit.
9. A contactless track circuit system comprising a direction switching loss attenuation redundant controller according to any one of claims 1-8.
10. The contactless track circuit system of claim 9, comprising: a transmitter, a receiver, a lightning protection simulation network disk and the direction switching attenuation redundancy controller,
the transmitter and the receiver are respectively connected with a direction switching attenuation redundant controller;
the direction switching attenuation redundant controller is connected with the lightning protection simulation network disc;
and the track circuit signal sent by the sender reaches the lightning protection simulation network disc through the direction switching attenuation redundant controller, is transmitted among the lightning protection simulation network discs, returns to the direction switching attenuation redundant controller, and is sent to the receiver by the direction switching attenuation redundant controller.
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| CN114348047B (en) | 2023-06-30 |
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