CN217204258U - High-speed railway interval power cable well with physically-isolated strong and weak cables - Google Patents

Abstract

The utility model discloses a high-speed railway interval power cable well with physically isolated strong and weak cables, which comprises a cable well main body and interval cable grooves positioned on the side wall openings at the two ends of the cable well main body along the line direction; four angles of the cable well main body are oblique angles, the included angle between the oblique angle oblique edge and the interval cable groove is 140-155 degrees, and a concrete single-hole cable groove is formed in the cable well main body and close to the line side. The utility model discloses the bending radius requirement when having satisfied interval cable laying has realized the physical isolation of power cable and light current cable, has effectively prevented one side cable from catching fire, influences the dangerous emergence of opposite side cable normal operating to avoid the accident to enlarge, influence EMUs normal operation.

Description

High-speed railway interval power cable well with physically-isolated strong and weak cables

Technical Field

The utility model belongs to the technical field of railway roadbed engineering, especially, relate to an interval power cable well of high-speed railway of strong and weak cable physics isolation.

Background

The section cables of the high-speed railway in various professional projects such as traction power supply, electric power, communication, signals, information, disaster prevention and the like play an important role in the safe operation of the high-speed railway, and the quality of the laying quality of the section cables directly influences the personal safety of passengers. According to the railway roadbed cable trough figure number: according to a general reference diagram of a passage (2017) 8401', comprehensive cable grooves are formed along road shoulders on two sides of a railway subgrade, and the comprehensive cable grooves are in a communication signal information common groove mode and an electric power split groove mode; the communication signal information groove is separated from the power groove by a partition plate. When cables are laid, generally, strong electric cables such as power cables are laid on the side away from the railway line, and weak electric cables such as communication signal information are laid on the side close to the railway line. Due to the power supply requirements of the cable production process or the interval, cable wells are required to be arranged at cable heads and the positions needing track-crossing power supply, such as repeaters, base stations, traction substations and the like, so as to meet the process requirements and the power supply requirements. Railway roadbed cable trough map number: the specific way of the interval standard power cable well in the general reference drawing of the passage (2017)8401 ″ is shown in fig. 1 and 2.

Fig. 1 and 2 are sectional power cable wells of a prior art standard atlas. The power cable well is used for redundancy or track passing of the power cable, when the communication, signal, information, disaster prevention and other weak current cables pass through the power cable well, the communication, signal, information, disaster prevention and other weak current cables cannot be laid redundantly and directly pass through the power cable well, and no fireproof isolation is performed between the communication, signal, information, disaster prevention and other weak current cables and the power cable.

In the general reference picture, I type, II type communication signal cable shaft and power cable shaft do not consider power cable and weak current cable's physical isolation yet, do not consider the cable bend radius requirement when laying cable yet, cause the cable outer protective layer to damage easily, influence each other and then cause the fault range to enlarge when causing the trouble easily to cause certain serious influence to high-speed railway's safe operation.

Railway roadbed cable trough map number: the general reference diagram of the access (2017)8401 is widely applied to the range of the roadbed of passenger-cargo collinear railways and high-speed railways with the design speed of 200 km/h. In the railway operation process, the power cable head fault occurs for many times, so that weak current cables such as communication, signals and information are burnt, the fault range is expanded, and the safe operation of the motor train unit is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem that prior art exists, provide a high-speed railway interval power cable well of strong and weak cable physics isolation, through carrying out structural adjustment to interval power cable well to combine power cable laying design specification and cable bend radius requirement, overcome "railway roadbed cable duct picture number: the defects of a communication signal cable well and a power cable well in a general reference diagram of the passage (2017) 8401' solve the problem that the accident range is easily expanded because strong-current cables such as power cables and the like and weak-current cables such as communication signal information disaster prevention and the like are not physically isolated in the cable well.

The utility model is realized in such a way, the high-speed railway interval power cable well with the physical isolation of the strong and weak cables comprises a cable well main body and interval cable grooves positioned on the side wall openings at the two ends of the cable well main body along the line direction; four angle departments of cable shaft main part are the oblique angle, the contained angle between oblique angle hypotenuse and the interval cable duct is 140 ~ 155, be close to the line side in the cable shaft main part and be provided with concrete haplopore cable duct.

Preferably, the width of the notch of the concrete single-hole cable groove is the same as that of the weak current cable groove of the interval cable groove, and the shape of the concrete single-hole cable groove is consistent with that of the side wall of the cable well main body.

Further preferably, the concrete haplopore cable duct includes concrete baffle and concrete bottom plate, the thickness of concrete baffle is the same with the baffle thickness of interval cable duct, the top parallel and level of the top of concrete baffle and the top of the baffle of interval cable duct, the weak current cable duct bottom plate upper surface parallel and level of concrete bottom plate upper surface and interval cable duct.

Preferably, the concrete single-hole cable trough is formed by pouring concrete.

Preferably, the included angle between the bevel angle bevel edge and the interval cable groove is 150 degrees.

Preferably, cable hangers are arranged around the cable well main body.

The four right angles of a standard power cable well of a general reference figure of railway roadbed cable groove are adjusted to be 150-degree oblique angles, and a concrete single-hole cable groove of 350mm multiplied by 300mm is arranged close to the line side in the power cable well.

Adjusting the structure of the cable well: the cable wall of a well of the cable with interval cable tray and cable shaft junction is improved into the oblique angle by the right angle type of original design, and the preferred 150 degrees of hypotenuse and interval cable tray contained angle, satisfy the bending radius requirement of 15 times cable external diameter when guaranteeing interval through cable and getting into the cable shaft by interval cable tray, prevent that the cable is because bending radius does not satisfy the requirement, the cable receives internal force and action of gravity for a long time, the cable insulation protection layer that arouses damages, thereby cause cable electric leakage or short circuit, thereby cable fault takes place, influence the interval communication of high-speed railway, signal equipment's power supply safety.

Concrete haplopore cable duct of usefulness is kept apart to strong, weak cable in the cable shaft: the cable mainly plays a role in physical isolation of strong-current cables such as power cables and the like and weak-current cables such as communication signal disaster prevention and the like, and under the condition of meeting the cable load requirement, the normal use of the cable on one side is prevented from being influenced when faults such as fire and the like occur on the other side. For the novel interval power cable well, a 350mm multiplied by 300mm concrete single-hole cable groove is formed in the cable well close to the track side, wherein weak current cables such as communication signal disaster prevention are laid along the set 350mm multiplied by 300mm concrete single-hole cable groove, and strong current cables such as 10kV power cables complete cable redundancy, track crossing, cable head setting and other works in the cable well. Physical isolation of a strong current cable and a weak current cable is achieved through a concrete slab of the concrete single-hole cable trough, faults such as ignition of the power cable are prevented, and safe operation of power supply cables such as signals and communication is prevented from being affected, so that safe operation of a motor train unit of a high-speed railway is guaranteed, and life and property safety of passengers is maintained.

The utility model has the advantages and positive effects that:

the utility model discloses an interval power cable well is satisfying under the condition of power cable bend radius and structure atress, has realized the physical isolation of strong current cables such as power cable and communication, signal, light current cables such as disaster prevention to prevented that power cable from catching fire the back, enlarged the influence range, light current cable, and then influence EMUs driving safety.

Drawings

FIG. 1 is a front view of an interval power cable well of a prior art standard atlas;

FIG. 2 is a sectional view A-A of FIG. 1;

fig. 3 is a front view of an interval power cable well provided by an embodiment of the present invention;

fig. 4 is a sectional view B-B of fig. 3.

In the figure: 1. a cable well body; 2. an inter-zone cable trough; 2-1, partition boards of interval cable troughs; 3. a power cable; 4. a weak current cable; 5. a power cable trough; 6. a weak current cable trough; 7. a cable hooking device; 8. oblique angle; 9. a concrete single-hole cable trough; 9-1, concrete partition boards; 9-2 and a concrete bottom plate.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:

the utility model discloses an interval power cable well, it is to have not set up the strong current cables such as power cable 3 and the isolation measure between the weak current cables such as communication, signal, disaster prevention 4 in the interval power cable well in the general reference picture of "railway roadbed cable duct"; the special cable well is set to be square in the general reference diagram of railway roadbed cable groove, when a cable enters the cable well from the special cable groove, the right-angle part cannot meet the requirement of the bending radius of a power cable 3, the corner is stressed, the cable insulation skin is easy to crack after long-time work, and faults such as electric leakage, short circuit and the like occur, so that normal operation is influenced.

Referring to fig. 3 and 4, the embodiment provides a high-speed railway interval power cable well with physically isolated strong and weak cables, which includes a cable well main body 1 and interval cable troughs 2 located on openings at two side walls of the cable well main body 1 along a line direction, and the interval cable troughs are divided into a power cable trough 5 and a weak cable trough 6 by a partition plate 2-1 of the interval cable trough; the four corners of the cable well main body 1 are oblique angles 8, and the included angle between the oblique edge of each oblique angle 8 and the interval cable groove 2 is 140-155 degrees, preferably 150 degrees; be close to the line side in the cable shaft main part 1 and be provided with concrete haplopore cable duct 9, the notch width of concrete haplopore cable duct 9 is the same with the weak current cable duct 6 width of interval cable duct 2, and the shape of concrete haplopore cable duct 9 is unanimous with cable shaft main part 1 lateral wall.

The concrete single-hole cable groove 9 comprises a concrete partition plate 9-1 and a concrete bottom plate 9-2, the thickness of the concrete partition plate 9-1 is the same as that of the partition plate 2-1 of the interval cable groove, the top of the concrete partition plate 9-1 is flush with that of the partition plate 2-1 of the interval cable groove, and the upper surface of the concrete bottom plate 9-2 is flush with that of the weak current cable groove 6 bottom plate of the interval cable groove 2. The concrete single-hole cable trough 9 is formed by pouring concrete.

And cable hook devices 7 are arranged around the cable well main body.

On the basis of a standard power cable well of a general reference diagram of railway roadbed cable grooves, four right angles of a rectangular cable well of an original standard diagram are changed into oblique angles 8 forming 150 degrees with an interval cable groove 2 by combining the requirements of a power cable 3 and a communication signal cable bending radius (15r), and a concrete single-hole cable groove 9 of 350mm multiplied by 300mm is arranged in the cable well and used for isolating strong cables such as the power cable 3 and the like from weak cables 4 such as communication signal disaster prevention and the like and preventing the power cable 3 or the weak cables 4 from influencing opposite cables when catching fire, so that the accident influence range is enlarged and the major driving safety problem is caused.

The right angle at the four corners of the power cable well is changed into a bevel angle of 150 degrees (8), and the current power through line is mainly considered to be 1 multiplied by 70mm ² Or 1X 95mm ² Single core steel wireA10 kV armored power cable 3 and a communication signal disaster prevention and other weak current cable 4 adopt a multi-core steel wire armored control cable, and the outer diameter of the cable is generally within the range of 30-40 mm. On the premise of meeting the requirement that the bending radius is not less than 15 times of the outer diameter, through calculation, field test and simulation, the 150-degree oblique angle 8 can meet the requirement of the bending radius during the laying of the interval cable, and the influence of the internal force of the cable caused by bending is effectively reduced.

A350 mm multiplied by 300mm concrete single-hole cable trough 9 is arranged along the side of a line in a power cable well, the laying requirements of weak current cables 4 such as communication signal disaster prevention are considered under the condition that the cable load requirements are met, the size of the concrete single-hole cable trough 9 in the cable well is consistent with that of the interval weak current cable trough 6, and the power cable 3 is completely isolated from the weak current cables 4 through a 50mm thick concrete partition plate 9-1. When cables are laid, flexible fireproof materials are coated on the concrete partition plate 9-1 before the cable well cover plate is covered, the cover plate is sealed with the concrete partition plate 9-1, after the cover plate is pressed, the power cables 3 and the weak current cables 4 are laid in two mutually independent physical spaces respectively, the cables on either side are on fire, the cables on the other side are not influenced, fire expansion is effectively prevented, and passengers are influenced to go out safely.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims (6)

1. A high-speed railway interval power cable well with physically isolated strong and weak cables comprises a cable well main body and interval cable grooves, wherein the interval cable grooves are formed in openings of side walls of two ends of the cable well main body along the line direction; the concrete single-hole cable groove is characterized in that four corners of the cable well main body are oblique angles, included angles between oblique angle oblique edges and the interval cable grooves are 140-155 degrees, and concrete single-hole cable grooves are formed in the cable well main body close to the line side.

2. The high-speed railway interval power cable well with physical isolation of strong and weak cables according to claim 1, wherein the width of the notch of the concrete single-hole cable groove is the same as that of the weak cable groove of the interval cable groove, and the shape of the concrete single-hole cable groove is consistent with that of the side wall of the cable well body.

3. The high-speed railway interval power cable well with physically separated strong and weak cables according to claim 2, wherein the concrete single-hole cable groove comprises a concrete partition plate and a concrete bottom plate, the thickness of the concrete partition plate is the same as that of the interval cable groove, the top of the concrete partition plate is flush with that of the interval cable groove, and the upper surface of the concrete bottom plate is flush with that of the weak electric cable groove bottom plate of the interval cable groove.

4. The high-speed railway section power cable well with the physically separated strong and weak cables as claimed in claim 1, wherein the concrete single-hole cable groove is formed by pouring concrete.

5. A high speed railway block power cable well of claim 1, wherein the angle between the beveled edge and the block cable groove is 150 °.

6. An interval power cable well of a high-speed railway with physically separated strong and weak cables according to claim 1, wherein cable hooks are arranged on the periphery in the main body of the cable well.

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