CN201819966U - Railway contact network line-breaking prevention proximity warning indicator - Google Patents
Railway contact network line-breaking prevention proximity warning indicator Download PDFInfo
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- CN201819966U CN201819966U CN201020285688XU CN201020285688U CN201819966U CN 201819966 U CN201819966 U CN 201819966U CN 201020285688X U CN201020285688X U CN 201020285688XU CN 201020285688 U CN201020285688 U CN 201020285688U CN 201819966 U CN201819966 U CN 201819966U
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- proximity warning
- wire clamp
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Abstract
The utility model relates to the technical field of railway electrification contact networks and particularly provides a railway contact network line-breaking prevention proximity warning indicator comprising two indicator bodies, a carrier cable clip and a contact line clip, wherein the two indicator bodies are clamped on the electrical cable of the contact network; the carrier cable clip clamps the carrier cable of the contact network and is electrically connected with one indicator; the contact line clip clamps the contact line of the contact network and is electrically connected with the other indicator; the indicator body comprises a sealed plastic shell, and a circuit board and a physical indicator arranged in the sealed plastic shell; and the circuit board is electrically connected with the physical indicator and comprises a potential difference detection circuit. The indicator has the characteristics of being accurate, reliable and fast, being less influenced by external factors and the like as the potential difference measuring mode is adopted to detect the subtle change of the contact resistor electrically connected.
Description
Technical field
The utility model relates to the electrification contact network technical field, and the anti-broken string of a kind of railway contact line PWI (proximity warning indicator) specifically is provided.
Background technology
The use of railway contact line has important progress to railway electrification.As the patent No. is that 200710018079.0 Chinese patent discloses a kind of " contact network system of high-speed electric railway ".
In the various faults of electrification contact network equipment, electric burn fault and the accident that causes thus are difficult to discovery because of it in advance, thereby quite big to the harmfulness of transportation safety, more and more cause the great attention of railway power supply department.
It is overheated that the influence that the contact net electrical fitting is subjected to extraneous factor easily takes place, and may cause power failure when serious, causes the withdrawal of train accident.It is overheated that the web member of contact net takes place, except the electric current that passes through continuously the excessive and overlong time, generally all be since the contact resistance of electric connection point increase cause.And the main cause that causes contact resistance to increase has:
(1) oxidation corrosion.Because the conductor tab position exposes for a long time in atmosphere, be subjected to Exposure to Sunlight all the year round, drench with rain, the erosion of travel fatigue dewfall and chemically reactive gas, cause serious corrosion in web member conductor tab surface or oxidation.Oxide layer can make the resistivity of conductor tab increase by tens times even hundreds of times.
(2) the conductor tab resistance increase that improper (crossing pine or tension) or external force cause is installed.The conductor tab position suffers mechanical shock, shake for a long time or at the wind action lower swing, conductor crimping bolt looseness, wire clamp is broken, and can cause the contact resistance of conductor connector to increase.
For the accident of taking precautions against such electric burn fault and causing thus, made unremitting effort about scientific research, production and maintenance department, also carried out the research and the trial of multiple technical scheme, but all unsatisfactory.As the patent No. is that the Chinese patent of 200710115115.X discloses " on-line monitoring system for temperature of contact line for electrified railway ", and by the temperature of infrared thermometer on-line monitoring contact net, cost of investment is high, and is subjected to such environmental effects easily.When the heating of sleety weather contact net is dispersed in the surrounding environment easily, fault has only to just being found time very serious.
The utility model content
The purpose of this utility model is to provide the anti-broken string of a kind of railway contact line PWI (proximity warning indicator), can be fast, accurately the line fault of contact net main conductive circuit is reacted.
For reaching above goal of the invention, the anti-broken string of the utility model railway contact line PWI (proximity warning indicator), comprise indicator body, Horizontal messenger wire clamp and osculatory wire clamp, two indicator bodies are clipped on the electric connection line of contact net, Horizontal messenger wire clamp is clamped the carrier cable of contact net and is electrically connected with one of them indicator, the combination utilization, the potential difference (PD) that detects between carrier cable and the electric connection line changes the variation of indirect reaction contact resistance.The osculatory wire clamp is clamped the osculatory of contact net and is electrically connected with the another one indicator, the combination utilization, and the potential difference (PD) that detects between osculatory and the electric connection line changes the variation of indirect reaction contact resistance.Described indicator body comprises the sealed plastic shell and places its inner circuit board, physical indicator that circuit board is electrically connected with physical indicator.Described circuit board comprises the potential difference (PD) testing circuit, behind the potential difference (PD) testing circuit detecting signal, is delivered to physical indicator.Described potential difference (PD) testing circuit comprises the signal limiter holding circuit, an interchange millivolt amplifying circuit, small-signal precise rectification circuit, signal amplitude comparator circuit, the power driving circuit that are electrically connected successively.Power driving circuit is connected with physical indicator, is used to export control signal.
The installation surface of contact of described indicator body is provided with stainless steel tooth folder, is used for increasing clamping friction force.Described Horizontal messenger wire clamp and carrier cable surface of contact are arcs of recesses, hold carrier cable during clamping tightly.The inside bending in the end of described osculatory wire clamp embeds in the longitudinal fluting of osculatory during clamping.Described physical indicator is that electromagnet armature is the semicircle turnover panel of snap close, also can be pilot lamp, hummer etc.
The anti-broken string of the utility model railway contact line PWI (proximity warning indicator) adopts the potential difference measurement mode to detect the subtle change that is electrically connected contact resistance, has accurately, reliable, fast and be subjected to extraneous factor to influence characteristics such as little; Can be fast, the contact resistance of accurate response contact net main conductive circuit connecting clamp increases, thereby can effectively prevent broken string accident owing to crimping bolt looseness, wire clamp break or reason such as conductor oxidation corrosion may cause, be innovative early warning security apparatus, can be widely used in the position that is electrically connected of electrification contact network main conductive circuit with distinct economic.
Description of drawings
Fig. 1 is the anti-broken string of the utility model railway contact line PWI (proximity warning indicator) mounting structure synoptic diagram;
Fig. 2 is the anti-broken string of the utility model railway contact line PWI (proximity warning indicator) Horizontal messenger wire clamp scheme of installation;
Fig. 3 is the anti-broken string of the utility model railway contact line PWI (proximity warning indicator) osculatory wire clamp scheme of installation.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment technical solutions of the utility model are further specified:
Be illustrated in figure 1 as the anti-broken string of the utility model railway contact line PWI (proximity warning indicator) mounting structure synoptic diagram.The anti-broken string of the utility model railway contact line PWI (proximity warning indicator) comprises that indicator body 03, Horizontal messenger wire clamp 02 and 06, two indicator body 03 of osculatory wire clamp are clipped on the electric connection line 04 of contact net.Described indicator body 03 is provided with stainless steel tooth folder with the electric connection line surface of contact, is used for increasing clamping friction force.Horizontal messenger wire clamp 02 is clamped the carrier cable 01 of contact net and is electrically connected by lead 11 with one of them indicator, and osculatory wire clamp 06 is clamped the osculatory 05 of contact net and is electrically connected by lead 12 with the another one indicator.Described indicator body 03 comprises the sealed plastic shell and places its inner circuit board.Described circuit board comprises the potential difference (PD) testing circuit.The potential difference (PD) testing circuit comprises the signal limiter holding circuit, an interchange millivolt amplifying circuit, small-signal precise rectification circuit, signal amplitude comparator circuit, the power driving circuit that are electrically connected successively.Horizontal messenger wire clamp and osculatory wire clamp are electrically connected with limiter protection circuit, are used to import the voltage of collection point.Power driving circuit is electrically connected with physical indicator, is used to export control signal.Described physical indicator also can be a pilot lamp.
Be the anti-broken string of the utility model railway contact line PWI (proximity warning indicator) Horizontal messenger wire clamp scheme of installation as Fig. 2.Described Horizontal messenger wire clamp 02 folder portion 22 and carrier cable surface of contact are arcs of recesses, hold carrier cable 01 during clamping tightly.The both sides of Horizontal messenger wire clamp 02 are provided with draws ear 21, opens folder portion 22 when being used to clamp.
Be the anti-broken string of the utility model railway contact line PWI (proximity warning indicator) osculatory wire clamp scheme of installation as Fig. 3.The inside bending in end of described osculatory wire clamp 06 folder portion 62 embeds in the longitudinal fluting of osculatory 05 during clamping.The both sides of osculatory wire clamp 06 are provided with draws ear 61, opens folder portion 62 when being used to clamp.
Claims (6)
1. railway contact line is prevented the broken string PWI (proximity warning indicator), it is characterized in that: comprise indicator body, Horizontal messenger wire clamp and osculatory wire clamp, two indicator bodies are clipped on the electric connection line of contact net, Horizontal messenger wire clamp is clamped the carrier cable of contact net and is electrically connected with one of them indicator, and the osculatory wire clamp is clamped the osculatory of contact net and is electrically connected with the another one indicator;
Described indicator body comprises the sealed plastic shell and places its inner circuit board, physical indicator that circuit board is electrically connected with physical indicator;
Described circuit board comprises the potential difference (PD) testing circuit, behind the potential difference (PD) testing circuit detecting signal, is delivered to physical indicator.
2. the anti-broken string of railway contact line as claimed in claim 1 PWI (proximity warning indicator) is characterized in that: the installation surface of contact of described indicator body is provided with stainless steel tooth folder, is used for increasing clamping friction force.
3. the anti-broken string of railway contact line as claimed in claim 1 PWI (proximity warning indicator) is characterized in that: described Horizontal messenger wire clamp with the carrier cable surface of contact be arcs of recesses, hold carrier cable during clamping tightly.
4. the anti-broken string of railway contact line as claimed in claim 1 PWI (proximity warning indicator) is characterized in that: the inside bending in the end of described osculatory wire clamp embeds in the longitudinal fluting of osculatory during clamping.
5. the anti-broken string of railway contact line as claimed in claim 1 PWI (proximity warning indicator), it is characterized in that: described physical indicator is that electromagnet armature is the semicircle turnover panel of snap close.
6. the anti-broken string of railway contact line as claimed in claim 1 PWI (proximity warning indicator); it is characterized in that: described potential difference (PD) testing circuit comprises the signal limiter holding circuit, an interchange millivolt amplifying circuit, small-signal precise rectification circuit, signal amplitude comparator circuit, the power driving circuit that are electrically connected successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020285688XU CN201819966U (en) | 2010-08-09 | 2010-08-09 | Railway contact network line-breaking prevention proximity warning indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020285688XU CN201819966U (en) | 2010-08-09 | 2010-08-09 | Railway contact network line-breaking prevention proximity warning indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201819966U true CN201819966U (en) | 2011-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020285688XU Expired - Fee Related CN201819966U (en) | 2010-08-09 | 2010-08-09 | Railway contact network line-breaking prevention proximity warning indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201819966U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149489A (en) * | 2012-09-28 | 2013-06-12 | 西南交通大学 | Disconnection discrimination method for electrified railway autotransformer (AT) traction network |
| CN104090188A (en) * | 2014-07-21 | 2014-10-08 | 郑州科尔物联科技有限公司 | Acquisition system for detecting connection state of electric connection clamp |
| CN104090202A (en) * | 2014-07-21 | 2014-10-08 | 郑州科尔物联科技有限公司 | Monitoring system and method for overhead line clamp electrical connection states |
-
2010
- 2010-08-09 CN CN201020285688XU patent/CN201819966U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149489A (en) * | 2012-09-28 | 2013-06-12 | 西南交通大学 | Disconnection discrimination method for electrified railway autotransformer (AT) traction network |
| CN104090188A (en) * | 2014-07-21 | 2014-10-08 | 郑州科尔物联科技有限公司 | Acquisition system for detecting connection state of electric connection clamp |
| CN104090202A (en) * | 2014-07-21 | 2014-10-08 | 郑州科尔物联科技有限公司 | Monitoring system and method for overhead line clamp electrical connection states |
| CN104090202B (en) * | 2014-07-21 | 2016-08-17 | 郑州科尔物联科技有限公司 | Monitoring system and monitoring method for contact net wire clamp status of electrically connecting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20130809 |