CN210337928U - Grating axle counting track circuit system - Google Patents
Grating axle counting track circuit system Download PDFInfo
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- CN210337928U CN210337928U CN201920597370.6U CN201920597370U CN210337928U CN 210337928 U CN210337928 U CN 210337928U CN 201920597370 U CN201920597370 U CN 201920597370U CN 210337928 U CN210337928 U CN 210337928U
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Abstract
The utility model discloses a grating meter axle track circuit system, the system includes grating meter axle equipment and ZPW-2000A track circuit, grating meter axle equipment with ZPW-2000A track circuit passes through the link module and connects row accuse center. The utility model discloses a grating axle counting equipment provides and occupies inspection function, and ZPW-2000A track circuit provides and sends out sign indicating number and disconnected rail inspection function, because grating axle counting equipment does not receive the influence of the rail condition, also can occupy and unusual the inspection to the uncertain district section that surpasss the track circuit application condition greatly of wheel rail contact resistance and railway roadbed resistance leakage. Therefore, the two are matched for use, the respective advantages are exerted, and the railway transportation safety can be improved.
Description
Technical Field
The utility model belongs to the track traffic field, in particular to grating axle counting track circuit system.
Background
The ZPW-2000A track circuit is widely used at home and abroad (fig. 7 shows an interface schematic diagram of the ZPW-2000A track circuit and a train control center in the prior art), but in the using process, the problems that the track circuit loses shunt inspection due to uncertain wheel-rail contact resistance, the track bed resistance leakage greatly exceeds the application condition of the track circuit, and the like occur, the occupation inspection function of the track circuit is influenced, the application of the track circuit is further influenced, the potential safety hazard is brought to railway operation, and the transportation efficiency is influenced.
At present, for solving a poor shunt section in a station, a ZPW-2000A frequency shift pulse track circuit (the frequency shift pulse track circuit is a track circuit superposed by a pulse signal and a frequency shift signal) is adopted, but the ZPW-2000A frequency shift pulse track circuit is not suitable for the conditions that the leakage of a ballast bed resistance greatly exceeds the application condition of the track circuit and the like; for the section with the track bed resistance leakage exceeding the application condition of the track circuit, the length of the section is cut by cutting the length of the track circuit section, such as the original section of 1200m, the section is cut into 3 track circuits with the length of 400m, however, for the reconstruction of the existing line, the compensation capacitor on the original track needs to be removed, the track circuits are rearranged and installed, the engineering construction amount is large, in addition, track circuit equipment needs to be additionally added, and the equipment cost is high.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a grating meter axle track circuit system, the system includes grating meter axle equipment and ZPW-2000A track circuit, grating meter axle equipment with ZPW-2000A track circuit passes through the link module and connects row accuse center.
Furthermore, the grating axle counting device comprises a grating axle counting sensor, an optical fiber cable, a grating demodulator, an axle counting host and an axle counting relay, wherein the axle counting host is electrically connected with the axle counting relay.
Further, ZPW-2000A track circuit includes trackside equipment and indoor equipment, indoor equipment includes track circuit sender, track circuit receiver, track circuit relay, track circuit receiver with the track circuit relay electric connection.
Further, the connection module comprises a track relay, and the axle counting relay and the track circuit relay are both electrically connected with the track relay.
Further, the system includes one or more sections.
Furthermore, the grating axle counting sensors are arranged at two ends of each section, one grating axle counting sensor is shared between every two adjacent sections, and the grating axle counting sensors at the two ends of each section are connected through the optical fiber cables.
Furthermore, armoring is arranged on the outer side of the optical fiber cable, and adjacent optical fiber cables are connected through a special optical cable junction box.
Furthermore, the grating axle-counting sensor is installed on the steel rail between the two sleepers through a special fixture, and three optical fiber Bragg gratings are arranged in each grating axle-counting sensor.
Furthermore, the grating axle counting sensor is connected with the grating demodulator, and the grating demodulator is electrically connected with the axle counting host through a CAN bus or an Ethernet.
Further, each section is provided with at least one group of the axle counting relay, the track circuit relay and the track relay.
The utility model discloses a grating axle counting equipment provides and occupies inspection function, and ZPW-2000A track circuit provides and sends out sign indicating number and disconnected rail inspection function, because grating axle counting equipment does not receive the influence of the rail condition, also can occupy and unusual the inspection to the uncertain district section that surpasss the track circuit application condition greatly of wheel rail contact resistance and railway roadbed resistance leakage. Therefore, the two are matched for use, the respective advantages are exerted, and the railway transportation safety can be improved. 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 the 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 needed to be 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows an overall schematic diagram of a grating axle counting track circuit system according to an embodiment of the present invention;
fig. 2 shows a schematic relay circuit diagram of a grating axle counting track circuit system according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an interface between a grating axle-counting track circuit system and a train control center according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating an occupancy check operation of a grating axle counting track circuit system according to an embodiment of the present invention;
fig. 5 shows a plot of measured passage of a train through a grating axle counter sensor in accordance with an embodiment of the present invention;
fig. 6 shows a schematic diagram of a safety platform stack and a relay stack gate according to an embodiment of the present invention;
fig. 7 shows a schematic diagram of the interface of a ZPW-2000A track circuit with a column control center according to the prior art.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are 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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a grating meter axle track circuit system, the system includes grating meter axle equipment and ZPW-2000A track circuit, grating meter axle equipment with ZPW-2000A track circuit passes through connecting module and connects row accuse center, provides by grating meter axle equipment and occupies the inspection function, because grating meter axle equipment does not receive the influence of rail condition, consequently it occupies the inspection function and also can not receive the influence of rail, ZPW-2000A track circuit provides code sending and disconnected rail inspection function, and is concrete, ZPW-2000A track circuit passes through the rail return circuit, transmits control information (send the code promptly) to the mobile unit, electric state change that causes through rail electric break realizes rail integrality inspection (disconnected rail inspection promptly), wherein grating meter axle equipment includes grating meter axle sensor, optic fibre cable, grating demodulation appearance, The system comprises a main shaft counting machine and a shaft counting relay (JGJ), wherein the main shaft counting machine, a grating demodulator and the shaft counting relay are powered through a power supply screen with proper power, the main shaft counting machine is electrically connected with the shaft counting relay, the system comprises one or more sections, grating shaft counting sensors are arranged at two ends of each section, one grating shaft counting sensor is shared between every two adjacent sections, the grating shaft counting sensors at two ends of each section are connected through optical fiber cables, the optical fiber cables are laid along cable trenches beside a rail, armoring is arranged outside the optical fiber cables, the adjacent optical fiber cables are connected through special optical cable splicing boxes, the grating shaft counting sensors are arranged on a steel rail between two sleepers through special clamps, three optical fiber Bragg gratings are arranged in each grating shaft counting sensor, and the grating shaft counting sensors are connected with the grating demodulator, the grating demodulator is electrically connected with the axle counting host through a CAN bus or an Ethernet.
Specifically, the ZPW-2000A track circuit comprises trackside equipment and indoor equipment, the indoor equipment comprises a track circuit transmitter, a track circuit receiver and a track circuit relay (DGJ), and the track circuit receiver is electrically connected with the track circuit relay.
Furthermore, the connection module comprises a track relay, the axle counting relay and the track circuit relay are electrically connected with the track relay (GJ), and each section is at least provided with a group of the axle counting relay, the track circuit relay and the track relay.
Illustratively, fig. 1 shows an overall schematic view of a raster axle counting track circuit system, showing three sections of the raster axle counting track circuit system, but not limited to three, two of the sections are taken as an example for explanation, two ends of the two sections are respectively provided with a grating axle counting sensor A, a grating axle counting sensor B and a grating axle counting sensor C, the grating axle counting sensor B is a shared grating axle counting sensor of adjacent sections, the grating axle counting sensor A, the grating axle counting sensor B and the grating axle counting sensor C are connected to a grating demodulator through optical fiber cables, the optical fiber cables are laid along the side of a track in an existing cable trench, armoring is added to the optical fiber cables in order to guarantee the reliability of the optical fibers in the application process, the adjacent optical fiber cables are connected through special optical cable junction boxes, the grating demodulator is connected to an axle counting host through a CAN bus or an Ethernet, and the axle counting host is electrically connected with an axle counting relay (JGJ). The grating axle counting sensor A and the grating axle counting sensor B are analyzed through a grating demodulator, then the analyzed data are transmitted to an axle counting host, and the JGJ1 of the section is controlled by the axle counting host; the grating axle counting sensor B and the grating axle counting sensor C are analyzed through a grating demodulator, then the analyzed data are transmitted to an axle counting host, and the JGJ2 of the section is controlled by the axle counting host. Each section corresponds to one group of track circuit equipment, each group of track circuit equipment comprises trackside equipment and indoor equipment, the trackside equipment comprises two PTs (tuning matching units) and one SVA (hollow coil), and the PTs and the SVAs are electrically connected with the track through cables; the indoor equipment comprises a track circuit transmitter, a track circuit receiver, a lightning protection simulation network, an attenuator and a track circuit relay. One PT is electrically connected with the track circuit transmitter through the lightning protection simulation network, the other PT is electrically connected with the track circuit receiver through the lightning protection simulation network and the attenuator, and the track circuit receiver is electrically connected with the track circuit relay.
The axle counting relay, the track circuit relay and the track relay form a relay circuit of the grating axle counting track circuit system, as shown in figure 2, the axle counting relay is connected with the track circuit relay in series and then connected with the track relay, and KZ and KF are relay power supplies in the figure. The train control center collects the state of the track relay of the grating axle counting track circuit system, as shown in fig. 3.
Redesigning the ZPW-2000A track circuit adjustment reference table, and readjusting the level of a track circuit transmitter and a track circuit receiver according to the ZPW-2000A track circuit adjustment reference table, wherein the ZPW-2000A track circuit adjustment reference table should satisfy the following conditions:
1. ensuring that the locomotive signal current is large enough to meet the code sending function;
2. the ZPW-2000A track circuit is ensured not to generate red light band under the condition of the lowest track bed;
3. the ZPW-2000A track circuit is ensured to have a broken track checking function within the technical condition range.
According to technical standard I of railway signal maintenance rules:
1. under the most unfavorable condition, the track circuit is shunted by a standard shunt line on any track surface of the track, and the short-circuit current is not less than that shown in the following table:
2. when the track circuit is in an adjusting state, the voltage of the 'out 1' should not be less than 240mV, the voltage of the 'out 2' should not be less than 100mV, the voltage of the small track receiving condition is not less than 20V, and the track relay is reliably attracted.
3. The track circuit should be able to implement a full-course rail break inspection. When the main rail is disconnected, the voltage of the 'rail out 1' is not more than 140mV, and the rail relay reliably falls down. When the small rail is broken, the voltage of the '2 out of rail' is not more than 63mV, and the rail relay reliably falls down.
For example, taking one of the zones as an example for further explanation, as shown in fig. 4, a grating axle counting sensor a is installed at the entrance of the zone, a grating axle counting sensor B is installed at the exit, and the idle/occupied status of the zone is determined by comparing the number of axles recorded by two axle counting points. The specific process is as follows: the method comprises the following steps that a train drives into a section provided with a grating axle counting sensor, the grating axle counting sensor A senses the effect of wheels on steel rails, a grating demodulator receives signals from the grating axle counting sensor A in real time and sends information to an axle counting host at the same time, the axle counting host starts counting and combines the driving direction information of the train, if the driving direction is consistent with the entering section direction, the number of axles at the end A is increased, otherwise, the number of axles at the end A is reduced; the axis of the grating axis-counting sensor B also follows the above principle. Comparing A, B the number of axes at two ends in real time, if they are not equal, sending the occupied signal of the section, and making the axle counting relay fall down; if the two signals are equal, a section idle signal is sent out, so that the axle counting relay is sucked up.
The grating axle counting sensor adopts a fiber Bragg grating sensing technology, a sensitive element of the grating axle counting sensor adopts a Fiber Bragg Grating (FBG), one grating axle counting sensor comprises 3 FBGs, one FBG is used for temperature compensation, and the other two FBGs are used for judging the running direction of the train. The grating axle counting sensor is installed on a steel rail between two sleepers by using a special fixture, the grating axle counting sensor is tightly attached to the steel rail by using the special fixture in the installation process, pretightening force is generated in the installation and clamping process, so that the grating is strained, the central wavelength of the grating is changed, once the situation of looseness or falling is generated, the pretightening force is reduced, the deformation of the grating is recovered, the wavelength of the grating is also changed, and therefore the looseness or falling detection of the grating axle counting sensor can be realized by judging the pretightening force. When a train passes through the section of steel rail, the steel rail is deformed under the action of wheels, the acting force of the wheels on the section of steel rail can be detected by utilizing the strain sensing characteristic of the grating axle counting sensor, as shown in fig. 5, the actually measured curve of a certain train passing through the grating axle counting sensor can be seen, the signal has an obvious extreme point, the signal is shaped and converted into a time sequence pulse signal, and the number of the pulse signals is counted, so that the number of the wheel shafts can be obtained. Meanwhile, the train running direction can be judged according to the sequence of the peak values of the 1# FBG and the 2# FBG, when the 1# FBG is prior to the peak value of the 2# FBG, the train runs along the direction that the 1# FBG points to the 2# FBG, and otherwise, the train runs along the direction that the 2# FBG points to the 1# FBG.
The grating demodulator is arranged indoors, and in order to ensure the reliability of data, the grating demodulator transmits data to the axle counting host, and a safe communication protocol is used. Data transmission is carried out between the grating demodulator and the axle counting host through a CAN bus or an Ethernet, and the indoor power supply screen is used for supplying power to the safety platform box, wherein the safety platform box comprises the grating demodulator and the axle counting host, a relay group brake is formed by a plurality of axle counting relays, and the axle counting host is electrically connected with the axle counting relays, as shown in fig. 6. The relay group brake can be arranged in the existing integrated cabinet or the newly added integrated cabinet, and the axle counting relay can adopt a JWXC-1700 type relay or other applicable types of relays.
The axis counting host receives the number of the axes of the grating demodulator and the state of the grating axis counting sensor in real time, compares the number of the axes of the entrance and the exit of each section, and controls the axis counting relay to keep a suction state if the comparison results are consistent; and if the comparison result is inconsistent, controlling the axle counting relay of the corresponding section to fall down. When receiving the abnormal information of the axle counting state sent by the grating demodulator, controlling the corresponding axle counting relay to fall down, which is specifically expressed as follows:
when the number of the metering shafts of the grating metering shaft sensor at the entrance and the exit of the section is equal, the metering shaft relay is sucked up;
when the number of the counting shafts of the grating counting shaft sensor at the entrance and the exit of the section is not equal, the counting shaft relay falls down;
when the grating axle-counting sensor at the entrance or the exit of the section is abnormal, the axle-counting relay falls down, if the grating axle-counting sensor loosens or falls off;
in other abnormal conditions, the axle counting relay falls down, if the loss of the optical signal transmission channel is too large or the transmission channel is disconnected, the abnormal conditions can be judged by the intensity of the optical signal received by the grating demodulator: when the grating demodulator cannot receive the optical signal, the optical signal transmission channel is disconnected; when the intensity of the optical signal received by the grating demodulator is reduced, the situation that the loss of the transmission channel is increased is shown.
The axle counting host has conditional reset and pre-reset functions.
As shown in fig. 2, when one of the track circuit relay and the axle counting relay falls, the track relay falls (similar to the switch being off), and the section is indicated as occupied or broken; when both the axle counting relay and the track circuit relay are picked up (similar to a switch off), the track relay is picked up and the section is indicated as idle. Therefore, as shown in fig. 3, the train control center only needs to acquire the state of the track relay to know whether the section is in an occupied or broken track state or an idle state.
The utility model discloses both be applicable to the uncertain district section (commonly known as bad along separate routes) that arouses track circuit to lose inspection along separate routes of wheel rail contact resistance, be applicable to the district section that track bed resistance leakage surpasss track circuit application condition greatly again, need not the complete set and increase track circuit system, only need modify ZPW-2000A track circuit adjustment reference table, increase grating axle counting equipment, and grating axle counting equipment has high temperature resistant, small, light in weight, anti-electromagnetic interference, adapt to adverse circumstances, do not receive the influence of rail condition (such as greasy dirt, the corrosion, the big etc. of track bed leakage), need not the lightning protection component, signal transmission uses optical fiber cable to compare copper core cable advantage such as much with low costs.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The optical grating axle counting track circuit system is characterized by comprising optical grating axle counting equipment and a ZPW-2000A track circuit, wherein the optical grating axle counting equipment and the ZPW-2000A track circuit are connected with a train control center through a connecting module.
2. The grating axle counting track circuit system according to claim 1, wherein the grating axle counting device comprises a grating axle counting sensor, an optical fiber cable, a grating demodulator, an axle counting host and an axle counting relay, and the axle counting host is electrically connected with the axle counting relay.
3. The optical grating axle counting track circuit system according to claim 2, wherein the ZPW-2000A track circuit comprises trackside equipment and indoor equipment, the indoor equipment comprises a track circuit transmitter, a track circuit receiver and a track circuit relay, and the track circuit receiver is electrically connected with the track circuit relay.
4. The grating axle counting track circuit system according to claim 3, wherein the connection module comprises a track relay, and the axle counting relay and the track circuit relay are electrically connected with the track relay.
5. A raster axle counting track circuit system according to any one of claims 1 to 4, comprising one or more segments.
6. The grating axle counting track circuit system according to claim 5, wherein the grating axle counting sensors are arranged at two ends of each section, one grating axle counting sensor is shared between adjacent sections, and the grating axle counting sensors at two ends of each section are connected through optical fiber cables.
7. The grating axle-counting track circuit system according to claim 6, wherein the outside of said fiber optic cable is provided with armor, and adjacent said fiber optic cables are connected by a dedicated cable closure.
8. The grating axle counting track circuit system according to claim 7, wherein the grating axle counting sensors are mounted on the rail between two sleepers by special fixtures, and each grating axle counting sensor is provided with three fiber Bragg gratings therein.
9. The grating axle counting track circuit system according to claim 8, wherein the grating axle counting sensor is connected with a grating demodulator, and the grating demodulator is electrically connected with the axle counting host machine through a CAN bus or an Ethernet.
10. The grating axle counting track circuit system according to claim 9, wherein at least one set of said axle counting relay, track circuit relay and track relay is provided for each of said segments.
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| CN201920597370.6U CN210337928U (en) | 2019-04-28 | 2019-04-28 | Grating axle counting track circuit system |
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| CN201920597370.6U CN210337928U (en) | 2019-04-28 | 2019-04-28 | Grating axle counting track circuit system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110091893A (en) * | 2019-04-28 | 2019-08-06 | 北京全路通信信号研究设计院集团有限公司 | Grating axle counting track circuit system and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110091893A (en) * | 2019-04-28 | 2019-08-06 | 北京全路通信信号研究设计院集团有限公司 | Grating axle counting track circuit system and working method |
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