CN202816411U - Remote monitoring break line alarm through grounding wire - Google Patents
Remote monitoring break line alarm through grounding wire Download PDFInfo
- Publication number
- CN202816411U CN202816411U CN 201220385635 CN201220385635U CN202816411U CN 202816411 U CN202816411 U CN 202816411U CN 201220385635 CN201220385635 CN 201220385635 CN 201220385635 U CN201220385635 U CN 201220385635U CN 202816411 U CN202816411 U CN 202816411U
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- CN
- China
- Prior art keywords
- ground wire
- cable core
- remote monitoring
- alarm
- alarm unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a remote monitoring break line alarm through grounding wire which comprises a cable core and an outer sheath arranged outside the cable core. The cable core comprises several metal conductors which are mutually twisted together and an alarm unit which is positioned at any position of the cable core. The alarm unit is formed by twisting two insulated single lines together. The alarm unit is coated with a metal shielding layer. The insulated single lines are metal conductors which are extrudedly coated with an insulating layer. The metal conductors extrudedly coated with the insulating layer are formed by twisting one or more lines. The outer sheath is prepared from a thermoplastic flameresistant material. The remote monitoring break line alarm through grounding wire provided by the utility model has a simple structure. By the utilization of capacitance between the two insulated conductors for real-time monitoring, functions of through grounding wire missing, breakpoint location and timely alarming can be realized. In addition, the thermoplastic flameresistant outer sheath can be used to prevent generation of electric arc so as to avoid fire hazard.
Description
Technical field
The utility model relates to a kind of Through ground wire that applies to railway, relates in particular to a kind of remote monitoring break alarm Through ground wire.
Background technology
Railway is the important infrastructure of country, plays an important role in the comprehensive system of transport.As the Through ground wire of Comprehensive Grounding System of Dedicated Passenger Line important component part, the degree of reliability of its mounting and installation directly affects the safe and reliable operation of whole railway signal system.But the Loss of Through ground wire can't in time be found after serious and stolen in recent years, made railway signal system ground connection facility disappearance, had destroyed signal system potential balance state completely, produced for transportation and hid some dangers for.And according to investigations, in the PDL Construction, 70% highway section is bridge, tunnel, Through ground wire all requires to be placed in the cable trough in these locations, the ground wire Loss in these locations is relatively serious, carry out completely that the mode of investigation prevents that the ground line dropout from obviously not gearing to actual circumstances if rely on to increase manpower, therefore, common Through ground wire can not solve Through ground wire fracture that artificial or irresistible external force causes and be difficult for the problem that is found, can not in time safeguards.
Chinese patent ZL200820105490, name is called " railway synthetic run-through ground wire of copper " utility model patent and discloses a kind of railway synthetic run-through ground wire of copper, comprise: conductive jacket, single copper clad aluminum conductor, break alarm core, the mutual uniform winding of described single copper clad aluminum conductor forms the stranded core of copper cover aluminum together, and conductive jacket closely is centered around around the stranded core of copper cover aluminum.This scheme also can realize utilizing the variation of resistance value to carry out break alarm, its principle is according to monitor real-time sampling to be carried out in the impedance of Through ground wire, built-in CPU with preset normal Standard resistance range and compare after, make and normally judging with fault, and finish and indicate and sound and light alarm.
The drawback of above-mentioned prior art is that the alarm unit of this kind warning ground wire is an eradication edge single line, it and some copper conductors are twisted together, in the production process, the projection of the generation that continues of copper conductor, burr etc., very easily cause the alarm unit insulation resistance not meet standard-required, make the break alarm afunction, and owing to insulated single wire is stranded in the conductor centre of Through ground wire, if continuing, fracture, Through ground wire crimping be difficult for implementing.
In addition, present railway combined grounding system mostly is conducting polymer composite or aluminum alloy materials with the Through ground wire oversheath, has good electric conductivity, and at bridge, there is the metal object of attached cable groove etc. in the laying area of tunnel section Through ground wire, when thunderbolt or the train of high-speed cruising make Through ground wire produce certain induced voltage, induced current, if it reaches respectively 10V, during 100mA, in the gap (or claiming arc gap) of ground wire and metal object, can produce an extreme temperatures, extremely strong and the gas that can conduct electricity of brightness, usually said electric arc namely, because the high temperature of electric arc and high light are with the sheath of scaling loss peripheral cable, in the serious situation even cause fire, jeopardize the safety of personnel and equipment.
The utility model content
The purpose of this utility model provides a kind of remote monitoring break alarm Through ground wire, can solve the losing of Through ground wire, fault point locating, and the problem of alarm, effective help is provided for the antitheft and maintenance work of Through ground wire, simultaneously also solved existing Through ground wire and the problem that electric arc causes fire occurred, operating for the safety of Line for Passenger Transportation train provides guarantee.
The utility model adopts following technical proposals:
A kind of remote monitoring break alarm Through ground wire, comprise cable core and be arranged on the outer oversheath of cable core, described cable core comprises by some mutually stranded metallic conductors and the alarm unit that is positioned at the cable core optional position and forming, and described alarm unit is two to thoroughly do away with stranded the forming of edge single lines.
The metallic conductor of described outer extruded insulation layer is single or many stranded forming.
Described oversheath is the thermoplastic flame-proof material.
The utility model is simple in structure, utilize two to thoroughly do away with electric capacity Real-Time Monitoring between the edge wires and can realize the losing of Through ground wire, fault point locating, and the function of alarm, effective help is provided for the antitheft and maintenance work of Through ground wire, use simultaneously the thermoplastic flame-proof material to do oversheath and solved the problem that existing Through ground wire generation electric arc causes fire, operating for the safety of Line for Passenger Transportation train provides guarantee.
Description of drawings
Fig. 1 is the utility model cross-sectional structure schematic diagram.
Embodiment
As shown in the figure, the utility model comprises metallic conductor 1, alarm unit 3, oversheath 6, cable core 2 alarm unit 3 stranded by some metallic conductor 1 and that be positioned at cable core 2 optional positions forms, described alarm unit 3 is two eradication edge single lines, 4 stranded forming, and alarm unit 3 is coated with metal screen layer 5, and cable core 2 peripheries are squeezed one deck oversheath 6.Described insulated single wire 4 is the single piece of metal conductor of outer extruded insulation layer.Described oversheath 6 is the thermoplastic flame-proof material.
Break alarm operation principle: when Through ground wire is in normal condition, two mutual capacitances that thoroughly do away with between the edge single line 4 in the monitoring equipment real-time detection alarming unit 3, when Through ground wire is subject to the External Force Acting fracture, two mutual capacitances that thoroughly do away with between the edge single line 4 change in this alarm unit 3, and monitoring equipment can automatically calculate breakpoint location and carry out actuation of an alarm according to the mutual capacitance value that changes.Its specific formula for calculation is as follows:
Wherein: C
xBe the rear Through ground wire mutual capacitance measured value that ruptures, unit is nF; C is the front Through ground wire mutual capacitance value of fracture, and unit is nF; L is the front Through ground wire total length of fracture, and unit is km; L
xBe the distance of test point apart from breakaway poing, unit is km.
The metal screen layer 5 of alarm unit 3 outer settings can effectively shield external electromagnetic interference, to guarantee the accurate and effective of on-line monitoring and fault point locating.
Because the ground wire oversheath that bridge, location, tunnel are laid does not directly contact with the earth, but the ground wire inner conductor reliably is connected with the integrated ground system in the horizontal mode that connects and connect earth terminal of multiple spot, can satisfy like this requirement of grounding system potential balance and quick earial drainage, therefore, the oversheath 6 of remote wireless network monitoring break alarm Through ground wire be the thermoplastic flame-proof material, and this thermoplastic flame-proof sheath has solved again the problem that metal object generation electric arc in ground wire and the cable trough causes fire under the prerequisite that does not affect the integrated ground performance.
Claims (5)
1. remote monitoring break alarm Through ground wire, comprise cable core and be arranged on the outer oversheath of cable core, it is characterized in that: described cable core comprises by some mutually stranded metallic conductors and the alarm unit that is positioned at the cable core optional position and forming, and described alarm unit is two to thoroughly do away with stranded the forming of edge single lines.
2. remote monitoring break alarm Through ground wire according to claim 1, it is characterized in that: described alarm unit is coated with metal screen layer.
3. remote monitoring break alarm Through ground wire according to claim 2, it is characterized in that: described insulated single wire is the metallic conductor of outer extruded insulation layer.
4. remote monitoring break alarm Through ground wire according to claim 3, it is characterized in that: the metallic conductor of described outer extruded insulation layer is single or many stranded forming.
5. arbitrary described remote monitoring break alarm Through ground wire according to claim 1-4, it is characterized in that: described oversheath is the thermoplastic flame-proof material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385635 CN202816411U (en) | 2012-08-06 | 2012-08-06 | Remote monitoring break line alarm through grounding wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385635 CN202816411U (en) | 2012-08-06 | 2012-08-06 | Remote monitoring break line alarm through grounding wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202816411U true CN202816411U (en) | 2013-03-20 |
Family
ID=47875256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220385635 Expired - Lifetime CN202816411U (en) | 2012-08-06 | 2012-08-06 | Remote monitoring break line alarm through grounding wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202816411U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103996447A (en) * | 2014-06-12 | 2014-08-20 | 江苏大地电缆有限公司 | Novel anti-theft cable |
| CN105895244A (en) * | 2016-06-14 | 2016-08-24 | 江苏东强股份有限公司 | Remote monitoring early-warning through ground wire |
-
2012
- 2012-08-06 CN CN 201220385635 patent/CN202816411U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103996447A (en) * | 2014-06-12 | 2014-08-20 | 江苏大地电缆有限公司 | Novel anti-theft cable |
| CN105895244A (en) * | 2016-06-14 | 2016-08-24 | 江苏东强股份有限公司 | Remote monitoring early-warning through ground wire |
| CN105895244B (en) * | 2016-06-14 | 2018-08-07 | 江苏东强股份有限公司 | Remote monitoring early warning Through ground wire |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |