CN111830380A - Method for monitoring state of steel rail insulating joint on line - Google Patents
Method for monitoring state of steel rail insulating joint on line Download PDFInfo
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- CN111830380A CN111830380A CN202010815695.4A CN202010815695A CN111830380A CN 111830380 A CN111830380 A CN 111830380A CN 202010815695 A CN202010815695 A CN 202010815695A CN 111830380 A CN111830380 A CN 111830380A
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- track
- lead terminal
- connection point
- choke transformer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- Train Traffic Observation, Control, And Security (AREA)
Abstract
A method for monitoring the state of a steel rail insulating joint on line comprises the following specific steps: s1, the track A and the track B are distributed side by side, and the track A and the track B are both provided with insulating sections C which divide the track A and the track B into a plurality of groups of different sections F at equal intervals; s2, connecting lead terminals on the choke transformer D and the choke transformer E with a track A and a track B in the same section F respectively; s3, monitoring (115) current values on the choke transformer E and the choke transformer D respectively by using a plurality of groups of pincerlike current transformers, wherein the plurality of groups of pincerlike current transformers are respectively in communication connection with a monitoring module; and S4, electrifying the track A and the track B in the same section F, and judging the insulation state of the steel rail between the adjacent sections F. The invention realizes the long-time on-line monitoring of the insulation state of the steel rail so as to ensure the requirement of normal running of the railway track.
Description
Technical Field
The invention relates to the technical field of railway tracks, in particular to a method for monitoring the state of a steel rail insulating joint on line.
Background
In railway stations in China, a track circuit is generally used for realizing the function of detecting the position of a train; the rail circuit is an important infrastructure of a railway train operation control system, and a steel rail is used as a conductor for transmitting various control signals of a detection train; in order to keep the train normally walking, the positions of the rail joints of each section in the station are connected and fixed together through a special iron splint; the positions of the rail joints can conduct current without installing special insulating materials; on the other hand, in order to improve the transportation efficiency and detect the position of the train in the station as accurately as possible, longer steel rail sections which are electrically conducted with each other need to be cut into short steel rail sections which are shorter in length and insulated from adjacent steel rails, namely, the length of a track circuit is made shorter as possible; at the moment, a steel rail insulating joint is required to be added at the position of a steel rail joint of the adjacent track circuits, so that the normal work of the adjacent track circuits cannot be influenced mutually;
in the actual application process, the rail insulation joint is easy to damage under the action of the impact force of vehicle operation, so that a track circuit breaks down; in order to ensure the long-term stable operation of a track circuit, railway workers need to test the steel rail insulation joint regularly to judge whether the insulation state is good or not;
the method for testing the steel rail insulation joint comprises the steps that a special steel rail insulation tester is adopted, a gauge pen of the steel rail insulation tester is connected to two ends of the insulation joint during testing, a test signal with specific frequency is generated inside the steel rail insulation tester, the test signal with a certain voltage amplitude is applied to the two ends of the insulation joint through the gauge pen, the steel rail insulation tester calculates the resistance value of the insulation joint by testing the current value of the specific frequency signal flowing through the insulation joint, and therefore whether the state of the insulation joint meets the requirement is judged;
however, the testing method has great limitation, and workers can only test during the maintenance of the skylight when the train stops running, so that the testing times in each month are very limited, and continuous long-time online detection cannot be realized; between two testing periods of the steel rail insulation joint, the insulation joint is easy to break and break, so that a track circuit fault is caused, and the travelling efficiency is influenced; therefore, the application provides a method for monitoring the state of the steel rail insulating joint on line.
Disclosure of Invention
Objects of the invention
In order to solve the technical problems in the background art, the invention provides a method for monitoring the state of a steel rail insulating joint on line, which realizes the long-time on-line monitoring of the insulating state of the steel rail so as to ensure the normal running requirement of a railway track.
(II) technical scheme
In order to solve the problems, the invention provides a method for monitoring the state of a steel rail insulating joint on line, which comprises the following specific steps:
s1, a track A and a track B are distributed side by side, a plurality of groups of insulation sections C are arranged on the track A and the track B and are used for dividing the track A and the track B into a plurality of groups of different track circuit sections at equal intervals, wherein each group of track circuit sections are marked as sections F;
s2, designating the connection point between the D1 lead terminal of the choke transformer D and the track B in the section F as connection point B1, and designating the connection point between the D2 lead terminal of the choke transformer D and the track a in the section F as connection point a 1;
a connection point of the lead terminal E1 of the choke transformer E and the track B in the section F is referred to as a connection point B2, and a connection point of the lead terminal E2 of the choke transformer E and the track a in the section F is referred to as a connection point a 2; the choke transformers E and D are distributed in a staggered mode; the E3 lead terminal of the choke transformer E is connected to the D3 lead terminal of the choke transformer D in the adjacent section F; the D3 lead terminal of the choke transformer D is connected to the E3 lead terminal of the choke transformer E in the adjacent section F;
s3, monitoring the current value on a connection line between the E1 lead terminal and the connection point B2 and the current value on a connection line between the E2 lead terminal and the connection point A2 respectively by using a first pincerlike current transformer, wherein the first pincerlike current transformer is connected with a first monitoring module in a communication mode;
respectively monitoring the current value of a connection wire between a D1 lead terminal and a connection point B1 and the current value of a connection wire between a D2 lead terminal and a connection point A1 by using a second pincer-shaped current transformer, wherein the second pincer-shaped current transformer is in communication connection with a second monitoring module;
s4, the control signal current of the track circuit flows on the track a and the track B in the same section F, wherein the current flow in the track a and the track B in the adjacent section F is opposite,
if the current difference values respectively monitored by the first monitoring module and the second monitoring module are zero, the insulating states of the track A and the track B between the adjacent sections F are good;
if the current difference respectively monitored by the first monitoring module and the second monitoring module is not zero, the insulation section C between the adjacent sections F is damaged.
Preferably, the frequency of the control signal of the track circuit comprises one or more of 25Hz, 50Hz, 1700Hz, 2000Hz, 2300Hz and 2600 Hz.
The technical scheme of the invention has the following beneficial technical effects:
in the invention, when in use, the lead terminals on the choke transformer D and the choke transformer E are correspondingly connected with the track A and the track B in the same section F, and the choke transformer D and the choke transformer E are connected, the control signal current of the track circuit flows in the circuit section of the track A and the track B in the same section F, if the state of the insulating joint C on the track circuit section is good, the control signal current of the track circuit only flows on the track A and the track B in the same section F, the current directions on the D1 lead terminal and the D2 lead terminal of the choke transformer D are opposite and the current amplitudes are the same, and the current directions on the E1 lead terminal and the E2 lead terminal of the choke transformer E are also opposite and the current amplitudes are the same, so that the insulating joint C monitored correspondingly is not damaged; when the insulation section C corresponding to monitoring is damaged, current passes through the insulation section C between adjacent sections F, current is generated between a connection point A1 and a connection point A2, current is generated by a midpoint connecting plate between a D3 lead terminal of a choke transformer D and an E3 lead terminal of the choke transformer E, abnormal current of the formed track current is monitored by a first monitoring module and a second monitoring module, accordingly, the insulation state of the track A and the track B in the same section F can be monitored on line for a long time, the insulation damage abnormity of the track A and the track B in the same section F can be found in time, the insulation section C with problems can be overhauled and maintained, and the safety of railway operation is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a method for monitoring the state of a steel rail insulation joint on line according to the present invention.
Fig. 2 is a schematic structural diagram of a track a and a track B in the same section F in the method for on-line monitoring of the state of the insulated joint of the steel rail according to the present invention, which controls the flowing direction of the signal current when the state of the insulated joint C is good.
Fig. 3 is a schematic block diagram of a system for on-line monitoring of the state of a rail insulation joint.
Reference numerals: 10. a split core current transformer; 111. a waveform conditioning circuit module; 112. a low-pass filter; 113. a display module; 114. a microcontroller; 115. a communication module; 116. a background monitoring terminal; 11. A monitoring module; a and B represent tracks; a1, a2, B1 and B2 represent different points of attachment; c represents an insulating joint; d and E both represent choke transformers; d1, D2, and D3 represent three sets of lead terminals of the choke transformer D; e1, E2, and E3 represent three sets of lead terminals of the choke transformer E.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-2, the method for on-line monitoring the state of the rail insulation joint provided by the invention comprises the following specific steps:
s1, a track A and a track B are distributed side by side, a plurality of groups of insulation joints C are arranged on the track A and the track B and used for dividing the track A and the track B into a plurality of groups of different track circuit sections at equal intervals, wherein each group of track circuit sections are marked as sections F, namely, steel rail insulation joints are added at the positions of steel rail joints of adjacent track circuits, so that normal work cannot be influenced mutually between the adjacent track circuits;
s2, designating the connection point between the D1 lead terminal of the choke transformer D and the track B in the section F as connection point B1, and designating the connection point between the D2 lead terminal of the choke transformer D and the track a in the section F as connection point a 1;
a connection point of the lead terminal E1 of the choke transformer E and the track B in the section F is referred to as a connection point B2, and a connection point of the lead terminal E2 of the choke transformer E and the track a in the section F is referred to as a connection point a 2; the choke transformers E and D are distributed in a staggered mode; the E3 lead terminal of the choke transformer E is connected to the D3 lead terminal of the choke transformer D in the adjacent section F; the D3 lead terminal of the choke transformer D is connected to the E3 lead terminal of the choke transformer E in the adjacent section F;
s3, using a group of pincerlike current transformers 10 to monitor the current value on a connection line between the lead terminal of the E1 and the connection point B2 and the current value on a connection line between the lead terminal of the E2 and the connection point A2 respectively;
using another set of the split-core type current transformers 10 to monitor the current value on the connection line between the D1 lead terminal and the connection point B1 and the current value on the connection line between the D2 lead terminal and the connection point A1 respectively; the plurality of groups of the pincerlike current transformers 10 are all electrically connected with the monitoring module 11;
s4, the control signal current of the track circuit flows on the track A and the track B in the same section F, wherein, in the railway station, in order to ensure the traffic safety, the principle that the adjacent track circuits must meet the polarity crossing is specified, namely, the control signal voltage of the steel rail at two sides of a steel rail insulating joint is positive, and the control signal voltage of the steel rail at the other side is negative at the same time point, therefore, the current flow in the track A and the track B in the adjacent section F is opposite,
if the current difference values respectively monitored by the multiple groups of monitoring modules 11 are all zero, it is indicated that the insulation states of the track A and the track B between the adjacent sections F are good;
if the current difference respectively monitored by the plurality of groups of monitoring modules 11 is not zero, it indicates that the insulation section C between the adjacent sections F is damaged.
In the invention, when in use, the lead terminals on the choke transformer D and the choke transformer E are correspondingly connected with the track A and the track B in the same section F, and the choke transformer D and the choke transformer E are connected, the control signal current of the track circuit flows in the circuit sections of the track A and the track B in the same section F, if the state of the insulating joint C on the track circuit section is good, the control signal current of the track circuit only flows on the track A and the track B in the same section F, the current directions on the D1 lead terminal and the D2 lead terminal of the choke transformer D are opposite and the current amplitudes are the same, the current directions on the E1 lead terminal and the E2 lead terminal of the choke transformer E are also opposite and the current amplitudes are the same, and the insulating joint C between the adjacent sections F correspondingly monitored is not damaged; when the insulation section C corresponding to monitoring is damaged, current passes through the insulation section C between adjacent sections F, current is generated between a connection point A1 and a connection point A2, current is generated by a midpoint connecting plate between a D3 lead terminal of a choke transformer D and an E3 lead terminal of the choke transformer E, abnormal track current is formed, and the abnormal current is monitored by the monitoring module 11, so that the insulation states of the track A and the track B in the same section F can be monitored on line for a long time, the abnormality of insulation damage of the track A and the track B in the same section F can be found in time, the insulation section C with problems can be overhauled and maintained, and the safety of railway operation is guaranteed.
In an alternative embodiment, the frequency of the control signal of the track circuit comprises one or more of 25Hz, 50Hz, 1700Hz, 2000Hz, 2300Hz and 2600 Hz.
As shown in fig. 3, the system for on-line monitoring the state of the rail insulation joint, provided by the invention, comprises a plurality of groups of choke transformers, a split core type current transformer 10 and a monitoring module 11, which are uniformly distributed along the length direction of a track a and a track B; the monitoring module 11 includes a waveform conditioning circuit module 111, a low pass filter 112, a display module 113 and a microcontroller 114;
the track A and the track B are distributed side by side, and a plurality of groups of insulating sections C are arranged on the track A and the track B and are used for dividing the track A and the track B into a plurality of groups of different track circuit sections at equal intervals, wherein each group of track circuit sections is marked as a section F; two groups of choke transformers positioned in the same section F are respectively marked as a choke transformer D and a choke transformer F; two groups of lead terminals of the choke transformer D and the choke transformer F in the same section F are respectively and electrically connected with the track A and the track B in the same section F, and the other groups of lead terminals of the choke transformer D and the choke transformer F in the adjacent sections F are mutually and electrically connected;
the waveform conditioning circuit module 111 is respectively and electrically connected with a plurality of groups of pincerlike current transformers 10 for monitoring current values on the connection lines of the choke transformers in the same section F and the track A and the track B in the section F; the plurality of groups of the pincerlike current transformers 10 correspond to the plurality of groups of the choke transformers one by one;
the low-pass filter 112 is electrically connected with the waveform conditioning circuit module 111, and the low-pass filter 112 is in communication connection with the microcontroller 114; the microcontroller 114 is communicatively connected to the display module 113.
In the invention, lead terminals on a choke transformer D and a choke transformer E are correspondingly connected with a track A and a track B in the same section F, and the choke transformer D and the choke transformer E are connected, control signal current of a track circuit flows in a circuit section of the track A and the track B in the same section F, and the current value on a connecting line of the choke transformer in the same section F and the track A and the track B in the section F is monitored through a plurality of groups of pincerlike current transformers 10, namely when the current directions on the lead terminals of the choke transformer D connected with the track A and the track B are opposite and the current amplitudes are the same, and the current directions on the lead terminals of the choke transformer E connected with the track A and the track B are also opposite and the current amplitudes are the same, the insulation joint C correspondingly monitored is not damaged; when the insulation joint C between the adjacent sections F is damaged, current passes through the insulation joint C between the adjacent sections F, current is generated between the choke transformer D in the adjacent sections F and the other group of lead terminals of the choke transformer F, abnormal track current is formed, an abnormal current value signal can be monitored through the pincerlike current transformer 10, the monitored current value signal sequentially passes through the waveform conditioning circuit module 111 and the low-pass filter 112 and is transmitted to the microcontroller 114, and finally the monitored current value is displayed on the display module 113.
In an optional embodiment, the system further comprises a communication module 115 and a background monitoring terminal 116;
the background monitoring terminal 116 is in communication connection with the microcontroller 114 through the communication module 115, the microcontroller 114 sends the received information to the background monitoring terminal 116 through the communication module 115, and the operating state of the insulating section C can be monitored in real time through the background monitoring terminal.
In an alternative embodiment, the background monitor terminal 116 includes a computer and a smart phone.
In an alternative embodiment, the communication module 115 includes any one of a WIFI module, a 3G network module, a 4G network module, and a 5G network module.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (2)
1. A method for monitoring the state of a steel rail insulating joint on line is characterized by comprising the following specific steps:
s1, a track A and a track B are distributed side by side, a plurality of groups of insulation sections C are arranged on the track A and the track B and are used for dividing the track A and the track B into a plurality of groups of different track circuit sections at equal intervals, wherein each group of track circuit sections are marked as sections F;
s2, designating the connection point between the D1 lead terminal of the choke transformer D and the track B in the section F as connection point B1, and designating the connection point between the D2 lead terminal of the choke transformer D and the track a in the section F as connection point a 1;
a connection point of the lead terminal E1 of the choke transformer E and the track B in the section F is referred to as a connection point B2, and a connection point of the lead terminal E2 of the choke transformer E and the track a in the section F is referred to as a connection point a 2; the choke transformers E and D are distributed in a staggered mode; the E3 lead terminal of the choke transformer E is connected to the D3 lead terminal of the choke transformer D in the adjacent section F; the D3 lead terminal of the choke transformer D is connected to the E3 lead terminal of the choke transformer E in the adjacent section F;
s3, monitoring the current value of the connection line between the lead terminal of the E1 and the connection point B2 and the current value of the connection line between the lead terminal of the E2 and the connection point A2 respectively by using a group of pincerlike current transformers (10);
another group of split core type current transformers (10) are used for respectively monitoring the current value on a connection line between a D1 lead terminal and a connection point B1 and the current value on a connection line between a D2 lead terminal and a connection point A1, and the plurality of groups of split core type current transformers (10) are all in communication connection with a second monitoring module (11);
s4, the control signal current of the track circuit flows on the track a and the track B in the same section F, wherein the current flow in the track a and the track B in the adjacent section F is opposite,
if the current difference values respectively monitored by the multiple groups of monitoring modules (11) are zero, the insulating states of the track A and the track B between the adjacent sections F are good;
if the current difference respectively monitored by the multiple groups of monitoring modules (11) is not zero, the insulation section C between the adjacent sections F is damaged.
2. The method for on-line monitoring the state of the steel rail insulation joints according to claim 1, wherein the frequency of the control signals of the track circuit comprises one or more of 25Hz, 50Hz, 1700Hz, 2000Hz, 2300Hz and 2600 Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010815695.4A CN111830380A (en) | 2020-08-14 | 2020-08-14 | Method for monitoring state of steel rail insulating joint on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010815695.4A CN111830380A (en) | 2020-08-14 | 2020-08-14 | Method for monitoring state of steel rail insulating joint on line |
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| Publication Number | Publication Date |
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| CN111830380A true CN111830380A (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010815695.4A Pending CN111830380A (en) | 2020-08-14 | 2020-08-14 | Method for monitoring state of steel rail insulating joint on line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960487A (en) * | 2021-09-02 | 2022-01-21 | 广西柳州钢铁集团有限公司 | Rapid repairing method for insulation short circuit fault of track circuit |
| CN113954918A (en) * | 2021-12-01 | 2022-01-21 | 北京聚智达科技有限公司 | Outdoor monitoring system of track circuit in station |
-
2020
- 2020-08-14 CN CN202010815695.4A patent/CN111830380A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960487A (en) * | 2021-09-02 | 2022-01-21 | 广西柳州钢铁集团有限公司 | Rapid repairing method for insulation short circuit fault of track circuit |
| CN113954918A (en) * | 2021-12-01 | 2022-01-21 | 北京聚智达科技有限公司 | Outdoor monitoring system of track circuit in station |
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