阅读说明：本技术 用于轨道交通的排流系统及轨道交通线路 (Drainage system for rail transit and rail transit line ) 是由 张海申 何斌 付雨林 邓小训 董智慧 吴江涛 龚孟荣 钟骏 刘贯琨 高昊 于 2019-09-23 设计创作，主要内容包括：本发明提供了一种用于轨道交通的排流系统及轨道交通线路,包括多个道床块、排流主线、排流支线和设置于道床块内的连接端子,连接端子通过排流支线与排流主线连通以将杂散电流排送至排流主线。该用于轨道交通的排流系统,在道床块内设置连接端子,连接端子将道床块内的排流网收集的杂散电流通过排流支线排送至排流主线,实现轨道交通线路内排流网的并接,从而不会因某一排流支线的不良贯通而导致整个轨道交通线路的排流失效,具有更高的可靠性。(The invention provides a drainage system for rail transit and a rail transit line, which comprise a plurality of track bed blocks, a drainage main line, a drainage branch line and connecting terminals arranged in the track bed blocks, wherein the connecting terminals are communicated with the drainage main line through the drainage branch line so as to discharge stray current to the drainage main line. This drainage system for track traffic sets up connecting terminal in the railway roadbed piece, and stray current that connecting terminal collected the drainage net in the railway roadbed piece is discharged to drainage mainline through drainage branch line, realizes the parallel connection of drainage net in the track traffic line to can not lead to the drainage of whole track traffic line to become invalid because of the bad link-through of a certain drainage branch line, have higher reliability.)

1. A drainage system for rail traffic, characterized by: the power distribution system comprises a plurality of track bed blocks, a drainage main line, a drainage branch line and a connecting terminal arranged in the track bed blocks, wherein the connecting terminal is communicated with the drainage main line through the drainage branch line so as to discharge stray current to the drainage main line.

2. The drainage system for rail transit of claim 1, further comprising at least one connection disposed on the drainage main; the connection terminal communicates with one of the connection parts through the drain branch line to discharge a stray current to the drain main line.

3. The drainage system for rail transit of claim 2, wherein the connectors are uniformly arranged on the drainage main line.

4. The drainage system for rail transit of claim 2, wherein each of the connectors is in communication with a plurality of the connection terminals, respectively.

5. The drainage system for rail transit according to claim 2, wherein a distance between the connection terminal and the connection portion communicating therewith is smaller than a distance between the connection terminal and the other connection portions.

6. The drainage system for rail transit according to any one of claims 2 to 5, wherein the connecting portion comprises a box body, a connecting copper bar and a supporting insulator, the connecting copper bar is mounted in the box body through the supporting insulator, and the drainage main line and the drainage branch line are respectively communicated with the connecting copper bar.

7. The drainage system for rail transit according to any one of claims 1 to 5, wherein the drainage main line and the drainage branch line are respectively one or more of cables, copper bars and galvanized flat steel.

8. The drainage system for rail transit of any one of claims 1 to 5, wherein the number of the connection terminals in each ballast bed block is one.

9. A rail transit line, characterized by: comprising the drainage system as claimed in any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of stray current drainage of rail transit, in particular to a drainage system for rail transit and a rail transit line.

Background

The rail transit train uses direct current power as traction power and generally uses a traveling rail as a return path. Because the return system of the running rail cannot be completely insulated from the ground, potential difference is generated between the running rail and the structural steel bars when the train runs, and then stray current is generated. Stray currents can cause galvanic corrosion to structural steel and underground metal pipelines. At present, the track traffic takes 'blocking as a main part, blocking as an auxiliary part, blocking and draining combined and reinforced monitoring' as a basic protection principle for the generated stray current. The term "drainage" refers to the establishment of a main stray current collection grid (i.e., drainage grid) by means of electrical communication of structural steel bars in the monolithic track bed, and the collection of stray currents leaking from the steel rails and returning the collected stray currents to the traction substation through a drainage cabinet.

The average length of the track bed blocks in the underground section of the rail transit is about 12m, the average length of the track bed blocks in the elevated section is about 6m, and the inside of the same track bed block is electrically communicated through intensive welding among reinforcing steel bars. In the traditional drainage method, connecting terminals which are interconnected with other track bed blocks are arranged at two ends of each track bed block, and the different track bed blocks are communicated through direct current cables to realize electrical communication, so that the electrical communication of a track bed drainage network between two traction substations is realized. The stray current is guided to the negative pole of the traction substation through the drainage network. The drainage network implementation scheme adopted by the method has the problem of low reliability. The stray current collection nets in different ballast bed blocks are connected in series through cables, when reinforcing steel bars in any connecting part or any ballast bed block are not electrically communicated, the drainage net in the whole interval can be out of action, and the stray current in the interval can not be discharged.

Disclosure of Invention

The invention aims to provide a drainage system for rail transit and a rail transit line, and aims to solve the technical problem that the drainage scheme in the prior art is low in reliability.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the invention provides a drainage system for rail transit, which comprises a plurality of track bed blocks, a drainage main line, a drainage branch line and a connecting terminal arranged in the track bed blocks, wherein the connecting terminal is communicated with the drainage main line through the drainage branch line so as to discharge stray current to the drainage main line.

Further, the drainage system further comprises at least one connecting part, and the connecting part is arranged on the drainage main line; the connection terminal communicates with one of the connection parts through the drain branch line to discharge a stray current to the drain main line.

Furthermore, the connecting parts are uniformly distributed on the drainage main line.

Further, each of the connection portions may communicate with a plurality of the connection terminals, respectively.

Further, the distance between the connection terminal and the connection portion communicating therewith is smaller than the distance between the connection terminal and the other connection portions.

Furthermore, the connecting part comprises a box body, a connecting copper bar and a supporting insulator, the connecting copper bar is installed in the box body through the supporting insulator, and the drainage main line and the drainage branch line are respectively communicated with the connecting copper bar.

Further, the drainage main line and the drainage branch line are respectively one or more of a cable, a copper bar and galvanized flat steel.

Further, the number of the connecting terminals in each ballast bed block is one.

According to another aspect of the invention, a rail transit line is also provided, comprising the drainage system described above.

According to the drainage system for the rail transit, provided by the invention, the connecting terminal is arranged in the track bed block, and the connecting terminal is used for discharging the stray current collected by the drainage network in the track bed block to the drainage main line through the drainage branch line, so that the parallel connection of the drainage networks in the rail transit line is realized, the drainage failure of the whole rail transit line due to the poor penetration of a certain drainage branch line is avoided, and the reliability is higher.

Drawings

Fig. 1 is a schematic structural diagram of a drainage system for rail transit according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a connection portion in a drainage system according to an embodiment of the present invention;

fig. 3 is a sectional view of the connection part shown in fig. 2.

Description of reference numerals:

10. a ballast bed block; 20. a drainage system; 21. a connection terminal; 22. a drain line; 221. a drainage main line; 222. draining the branch line; 23. a connecting portion; 231. a box body; 232. connecting the copper bars; 233. a support insulator.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, in a first aspect of the embodiments of the present application, there is provided a drainage system for rail traffic, including a plurality of track bed blocks 10, a drainage main line 221, a drainage branch line 222, and a connection terminal 21 disposed in the track bed blocks 10, wherein the connection terminal 21 communicates with the drainage main line 221 through the drainage branch line 222 to discharge a stray current to the drainage main line 221.

The drainage mode of the existing rail transit is greatly restricted by the construction quality of civil engineering, and when the electrical communication of structural steel bars in any connecting part or any bed block is interrupted, the drainage in the whole interval is invalid, so that the stray current of the whole rail transit line cannot be discharged. In the embodiment of the application, the stray current collected by the drainage net of the track bed block 10 is discharged to the drainage main line 221 through the connection terminal 21 and the drainage branch line 222, so that the diffusion of the stray current is limited. When any drainage branch line 222 in the drainage system 20 or the structural steel bars in any track bed block 10 have problems, the drainage of the stray current in a single track bed block 10 is only influenced, the drainage of the stray current of other track bed blocks 10 is not influenced, and the drainage reliability of the whole track traffic line is improved.

In the current drainage mode of rail transit, the setting position of connecting terminal is difficult to confirm accurately. The width of track traffic bed seam is generally about 100mm, and connecting terminal generally sets up at the bed seam edge, and connecting terminal is too close to the bed seam, can't satisfy cable bending radius's requirement, has torsion moment for a long time between cable and the terminal, and the cable is easily struggled for a long time or is damaged connecting terminal after the long-term lunar year.

In the drainage system of the embodiment of the application, the connection terminal 21 is connected to the drainage main line 221 through the drainage branch line 222, there is no requirement for the bending radius of the drainage branch line 222, the length of the drainage branch line 222 depends on the position of the connection point of the drainage branch line 222 and the drainage main line 221, and the connection terminal 21 only needs to be disposed on one side of the track bed block 10 close to the drainage main line 221. The position requirement of the connecting terminal 21 in each track bed block 10 is not high, the selection is flexible, the limitation of track bed seams is avoided, the adaptability to different track bed block 10 types and different track bed seam widths is good, and the implementation difficulty of engineering is reduced.

In some embodiments, the drainage main line 221 and the drainage branch line 222 are one or more of a cable, a copper bar, and a galvanized flat steel. Wherein the cable can be ethylene propylene rubber insulated DC flexible cable, and the cross-sectional area can be 95m according to the specific situation of the project²Or 150m²The cable of (1). When the main drainage line 221 and the branch drainage line 222 are made of copper bars or galvanized flat steel, they need to be insulated from other metal parts except the structural steel bars in the track bed block 10 during installation.

In the current drainage mode of rail transit, the number of connecting terminals is more. All need set up connecting terminal in the railway roadbed seam both sides, require simultaneously that every connecting terminal all should with the railway roadbed in the electrical connectivity between the structural reinforcement, the site operation difficulty, often appear after the construction that connecting terminal leaks to do, make the wrong condition. In the embodiment of the present application, the number of the connection terminals 21 in each track bed block 10 is one. The quantity of connecting terminal 21 reduces half than the quantity of connecting terminal 21 in the traditional scheme in this application embodiment, and the cost is reduced has improved the efficiency of engineering construction.

In some embodiments, the drainage system 20 further includes at least one connection 23, the connection 23 being disposed on the drainage main line 221; the connection terminal 21 communicates with one of the connection portions 23 through the drain branch line 222 to discharge the stray current to the drain main line 221. The connection portion 23 is provided to facilitate connection of the drain branch line 222 and the drain main line 221. In addition, each of the connection portions 23 may communicate with the plurality of connection terminals 21, respectively. That is, the plurality of connection terminals 21 can be connected to the same connection portion 23, and the number of connection portions 23 can be reduced, thereby reducing the construction requirement. In the embodiment of the application, each connecting part 23 is communicated with 2-8 connecting terminals 21. The connection portion 23 may be a junction box.

Further, the connection portions 23 are uniformly arranged on the drain main line 221. The uniform arrangement of the connection portions 23 can prevent the distance from each connection terminal 21 to the connection portion 23 from being too different, control the length of the drainage branch line 222, and reduce the cost. In other embodiments, the distance between the connection terminal 21 and the connection portion 23 communicating therewith is smaller than the distance between the connection terminal 21 and the other connection portion 23. The connection portion 23 closest to the connection terminal 21 is selected to be connected, so that the length of the drainage branch line 222 is reduced as much as possible, and the cost is reduced.

In some embodiments, the connecting portion 23 includes a box 231, a connecting copper bar 232 and a supporting insulator 233, the connecting copper bar 232 is mounted in the box 231 through the supporting insulator 233, and the drainage main line 221 and the drainage branch line 222 are respectively communicated with the connecting copper bar 232. The connecting portion 23 in the embodiment of the present application is a junction box, the main components arranged therein are a connecting copper bar 232 and a supporting insulator 233, and 4-8 connecting conditions connected with the drainage branch lines 222 and the drainage main line 221 are arranged on the connecting copper bar 232. The specification of the connecting copper bars 232 is 80mm by 5mm, 100mm by 5mm or other specifications. The length of the connecting copper bars 232 is determined according to the number of the connecting parts 23, and is generally 150mm to 250 mm. The support insulator 233 is provided to ensure insulation between the connecting copper bar 232 and the case 231, and to discharge stray current through the drain main line 221. The connecting part 23 adopts various wire inlet and outlet modes such as a side wire inlet and outlet and/or a bottom wire inlet and outlet. The connection 23 is fastened to the structural surface of the rail road by means of an anchor bolt or to the bracket of the drain wire 22 by means of a bolt.

In a second aspect of the embodiments of the present application, a rail transit line is provided that includes the drainage system 20 described above. Each track bed block 10 is provided therein with a connection terminal 21. In the track traffic line, the connection terminal 21 is arranged in the track bed block 10, and the stray current collected by the drainage net of the track bed block 10 is discharged to the drainage main line 221 through the drainage branch line 222, so that the diffusion of the stray current is limited. When any drainage branch line 222 or the structural steel bars in any track bed block 10 cannot be electrically connected, the drainage of the stray current in a single track bed block 10 is only influenced, the drainage of the stray current of other track bed blocks 10 is not influenced, and the drainage reliability of the whole track traffic line is improved.

The drainage system for the rail transit can greatly reduce construction difficulty, optimize the structure of a rail transit line, increase drainage reliability and simplify operation management difficulty. The scheme of the embodiment of the application is simple, reliable, economical and practical, has very wide practical value, and can be widely applied to the power supply system lines of the rail transit which adopts direct-current contact net (rail) power supply and steel rail backflow, such as subways, light rails, medium-low speed magnetic levitation, straddle type monorail, intercity railways and trams; the method can be used in newly built lines and can also be used in reconstruction projects.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.