CN212219974U - Direct-current traction power supply stray current corrosion protection system for ballast track traffic - Google Patents
Direct-current traction power supply stray current corrosion protection system for ballast track traffic Download PDFInfo
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- CN212219974U CN212219974U CN202020695591.XU CN202020695591U CN212219974U CN 212219974 U CN212219974 U CN 212219974U CN 202020695591 U CN202020695591 U CN 202020695591U CN 212219974 U CN212219974 U CN 212219974U
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Abstract
A DC traction power supply stray current corrosion protection system for ballast track traffic is provided, which can effectively reduce stray current caused by current and potential imbalance and improve the reliability and safety of the system. A 1 st connecting cable and a 2 nd connecting cable are respectively arranged between two rails of the ascending steel rail and the descending steel rail at certain intervals, and a flow equalizing cable is arranged between the ascending steel rail and the descending steel rail at certain intervals; respectively laying a No. 1 direct current cable and a No. 2 direct current cable in parallel along the ascending steel rail and the descending steel rail, wherein the No. 1 direct current cable is connected with the ascending steel rail in parallel through a No. 1 transverse electric connection at a certain distance, and the No. 2 direct current cable is connected with the descending steel rail in parallel through a No. 2 transverse electric connection; and a layer of structural reinforcing mesh with the 1 st structure and a layer of structural reinforcing mesh with the 2 nd structure are respectively added on the bottom layer of the looped network power cable trench along the ascending steel rail and the descending steel rail.
Description
Technical Field
The utility model relates to a track traffic power supply system, in particular to be applied to there is orbital direct current of tiny fragments of stone, coal, etc. to pull power supply system stray current corrosion protection system.
Background
In recent years, with the development of national economy, a traffic mode starting from tourism and rail gradually becomes a new urban passenger traffic system, the tourism rail traffic takes tourist sources as main service objects, the travel needs of people along the line are considered, scenic spots along the line and urban areas are effectively connected in series to form a bright scenic line, the promotion of the grade of the whole scenic spot is facilitated, and meanwhile, the comprehensive development function along the line is provided, so that the overall development of social economy is promoted. Aiming at the travel rail traffic, the power supply modes which can be selected are various, and the consideration of the aspects of the line characteristics, the current supply quality, the investment, the landscape needs along the line and the like is integrated, and the mode of adopting the direct current traction mode and the third contact rail power supply mode becomes an important mode of the travel rail traffic.
In practical application, in a direct current traction power supply mode, because a steel rail (a running rail) cannot be completely insulated from a track bed, the return current of a train inevitably leaks into the track bed and soil media around the track bed through the steel rail to form stray current, and the stray current electrochemically corrodes the buried metal pipelines around, communication cable sheaths and steel bars in main body structures of stations and interval tunnels, so that the electrochemical corrosion can not only shorten the service life of metal pipes and wires, but also reduce the strength and durability of the main body structures of reinforced concrete of track traffic, and even cause catastrophic accidents. At present, a ballastless track is adopted in general track traffic, a main stray current collecting net is formed by utilizing reliable electrical connection of structural steel bars in a whole track bed and a bridge rail bearing platform, the main stray current collecting net is connected to a negative bus of a traction substation through a drainage cabinet, a metal passage for returning stray current to the traction substation is provided, the outward leakage of the stray current is limited, and the corrosion of the stray current to metal pipelines and metal components is reduced.
The ballast track technology has the advantages of flexible laying and reconstruction, reasonable rigidity matching, economic manufacturing cost, excellent vibration damping effect, strong capability of adapting to unfavorable geological settlement, less steel rail diseases and the like, and is applied to domestic travel track traffic at present. The ballast track has the advantages that the ballast track is based on a stone granular ballast bed, the ballast track has larger difference with the traditional track traffic in an integral ballast bed mode, no integral ballast bed and drainage reinforcing mesh exist, stray current does not have corresponding collection drainage measures, and how to protect the stray current corrosion caused by a ballast track type direct current traction power supply system becomes a new subject.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a DC traction power supply stray current corrosion protection system that has tiny fragments of stone, coal, etc. track traffic is provided to effectively reduce the stray current that electric current and potential unbalance brought, reduce and reveal the total stray current in the railway roadbed and the soil medium on every side, reduce to bury ground metal pipeline, communication cable crust and station and the reinforcing bar electrochemical corrosion influence in the interval tunnel major structure on every side, improve the reliability and the security of system.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model relates to a there is ballast track traffic's direct current to pull power supply stray current corrosion protection system, pull power supply system and adopt 750V or 1500V direct current supply, pull and give the system and adopt third contact rail to give the mode of flow, characterized by: a 1 st connecting cable and a 2 nd connecting cable are respectively arranged between two rails of the ascending steel rail and the descending steel rail at certain intervals, and a flow equalizing cable is arranged between the ascending steel rail and the descending steel rail at certain intervals to perform flow equalizing distribution on the ascending reflux system and the descending reflux system; respectively laying a No. 1 direct current cable and a No. 2 direct current cable in parallel along an ascending steel rail and a descending steel rail, wherein the No. 1 direct current cable is connected with the ascending steel rail in parallel through a No. 1 transverse electric connection at a certain distance, the No. 2 direct current cable is connected with the descending steel rail in parallel through a No. 2 transverse electric connection, and a track backflow system is shunted; a layer of structural reinforcing mesh with the 1 st structure and a layer of structural reinforcing mesh with the 2 nd structure are respectively added at the bottom layer of a ring network power cable ditch along the ascending steel rail and the descending steel rail, an auxiliary stray current collecting and monitoring mesh is built by adopting electrically reliable connection and assembly, and the stray current collecting and monitoring mesh returns to a negative bus of a rectification traction substation through a drainage cabinet.
The utility model has the advantages that a stray current protection technology applied to rail transit, ballast tracks and a direct current traction power supply system is provided, a connecting cable is arranged between two rails of an ascending or descending steel rail at a certain distance, a current-sharing cable is arranged between the ascending and descending steel rails at a certain distance, and the current-sharing distribution is carried out on the ascending and descending reflux systems, so that the four steel rails of the ascending and descending form a balanced reflux system, and stray current caused by unbalanced current and potential is reduced; meanwhile, a direct current cable is laid in parallel along the track to be connected with the track in parallel for shunting, so that the purposes of controlling the safety potential of the track ground, reducing the backflow current in the track and finally reducing the total stray current leaked into the track bed and the soil medium around the track bed can be achieved, and the landscape requirement is not influenced by underground laying; in addition, the reinforcing mesh is added at the bottom of the cable trench along the track, and the auxiliary stray current collecting and monitoring mesh is constructed by the reinforcing mesh, so that the complicated high-investment stray current collecting and drainage reinforcing mesh constructed below the track of the traditional ballastless track is replaced, and the collection, detection and evaluation of the stray current are effectively completed. The whole system can realize the protection of stray current, effectively reduces the total stray current finally leaked to the ballast bed and the soil media around the ballast bed, reduces the electrochemical corrosion influence on the buried metal pipelines, the communication cable sheath around and the steel bars in the main body structures of the station and the interval tunnel, and improves the reliability and the safety of the system.
Drawings
The specification includes the following figures:
fig. 1 is a schematic diagram of the utility model relates to a direct current traction power supply system stray current corrosion protection system for ballast track traffic.
The component names and corresponding labels are shown in the figure: the device comprises a rectification traction substation 1, an ascending contact rail 2, an ascending steel rail 3, a 1 st direct current cable 4, a 1 st structural steel bar net 5, a 1 st connecting cable 6, a 1 st transverse electric connection 7, a 1 st return cable 8, a 2 nd return cable 16, a ballast track 9, a descending contact rail 10, a descending steel rail 11, a 2 nd direct current cable 12, a 2 nd structural steel bar net 13, a 2 nd connecting cable 14, a 2 nd transverse electric connection 15, a current equalizing cable 17 and a drainage cabinet 18.
Detailed Description
The invention will be further explained with reference to the drawings and the examples.
Referring to fig. 1, a direct current traction power supply stray current corrosion protection system for ballast track traffic, wherein a traction power supply system adopts 750V or 1500V direct current power supply, and a traction current-feeding system adopts a third contact rail current-feeding mode. A1 st connecting cable 6 and a 2 nd connecting cable 14 are respectively arranged between two rails of the ascending steel rail 3 and the descending steel rail 11 at certain intervals, and a current-sharing cable 17 is arranged between the ascending steel rail 3 and the descending steel rail 11 at certain intervals to share the current sharing of the ascending reflux system and the descending reflux system, so that the four steel rails on the ascending steel rail and the descending steel rail form a balanced reflux system, and stray current caused by unbalanced current and potential is reduced. Respectively along ascending rail 3, down rail 11 lays a 1 st DC cable 4, 2 nd DC cable 12 in parallel, every certain distance 1 st DC cable 4 connects 7 and goes up rail 3 parallelly through the 1 st horizontal electricity, 2 nd DC cable 12 connects 15 and down rail 11 parallelly through the 2 nd horizontal electricity, shunt the track return-flow system, make partial reflux current return to rectification traction substation 1 negative bus through the cable, thereby reduce the reflux current in the track, finally reduce the total stray current who reveals in the track bed and the soil medium around and. A layer of structural reinforcing mesh 5 of the 1 st structure and a layer of structural reinforcing mesh 13 of the 2 nd structure are respectively added at the bottom layer of a ring network power cable trench along the ascending steel rail 3 and the descending steel rail 11, and an auxiliary stray current collecting and monitoring mesh is formed by adopting electrical reliable connection and assembly and returns to a negative bus of a rectification traction substation 1 through a drainage cabinet 18.
The No. 1 direct current cable 4 and the No. 2 direct current cable 12 are 750V direct current cables or 1500V direct current cables. The arrangement distance of the current sharing cables 17 is generally 500 meters, and the arrangement distance of the 1 st transverse electric connection 7 and the 2 nd transverse electric connection 15 is 500 meters.
The above is only used for illustrating some principles of the stray current protection system of the ballast track traffic, and it is not intended to limit the present invention to the specific structure and the application range shown and described, so all the corresponding modifications and equivalents that may be utilized all belong to the patent scope applied by the present invention.
Claims (4)
1. The utility model provides a there is direct current of tiny fragments of stone, coal, etc. track traffic to pull power supply stray current corrosion protection system, pulls power supply system and adopts 750V or 1500V direct current power supply, and the system of awarding current is awarded current to the traction and adopts the third contact rail mode, characterized by: a 1 st connecting cable (6) and a 2 nd connecting cable (14) are respectively arranged between two rails of the ascending steel rail (3) and the descending steel rail (11) at certain intervals, and a flow equalizing cable (17) is arranged between the ascending steel rail (3) and the descending steel rail (11) at certain intervals to perform flow equalizing distribution on the ascending reflux system and the descending reflux system; respectively laying a 1 st direct current cable (4) and a 2 nd direct current cable (12) in parallel along the ascending steel rail (3) and the descending steel rail (11), wherein the 1 st direct current cable (4) is connected with the ascending steel rail (3) in parallel through a 1 st transverse electric connection (7) at a certain interval, the 2 nd direct current cable (12) is connected with the descending steel rail (11) in parallel through a 2 nd transverse electric connection (15), and a track backflow system is shunted; a layer of structural steel bar mesh (5) with the 1 st structure and a layer of structural steel bar mesh (13) with the 2 nd structure are respectively added at the bottom layer of a ring network power cable trench along the ascending steel rail (3) and the descending steel rail (11), an auxiliary stray current collecting and monitoring mesh is built by adopting electrical reliable connection and assembly, and the auxiliary stray current collecting and monitoring mesh returns to a negative bus of a rectification traction substation (1) through a drainage cabinet (18).
2. The system according to claim 1, characterized in that: the 1 st direct current cable (4) and the 2 nd direct current cable (12) are 750V direct current cables or 1500V direct current cables.
3. The system according to claim 1, characterized in that: the arrangement distance of the current equalizing cables (17) is 500 meters.
4. The system according to claim 1, characterized in that: the arrangement distance of the 1 st transverse electric connection (7) and the 2 nd transverse electric connection (15) is 500 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020695591.XU CN212219974U (en) | 2020-04-30 | 2020-04-30 | Direct-current traction power supply stray current corrosion protection system for ballast track traffic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020695591.XU CN212219974U (en) | 2020-04-30 | 2020-04-30 | Direct-current traction power supply stray current corrosion protection system for ballast track traffic |
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| Publication Number | Publication Date |
|---|---|
| CN212219974U true CN212219974U (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020695591.XU Active CN212219974U (en) | 2020-04-30 | 2020-04-30 | Direct-current traction power supply stray current corrosion protection system for ballast track traffic |
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|---|---|
| CN (1) | CN212219974U (en) |
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2020
- 2020-04-30 CN CN202020695591.XU patent/CN212219974U/en active Active
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