CN205318941U - Online protector of EMUs roof insulator flashover electric arc - Google Patents
Online protector of EMUs roof insulator flashover electric arc Download PDFInfo
- Publication number
- CN205318941U CN205318941U CN201521113197.6U CN201521113197U CN205318941U CN 205318941 U CN205318941 U CN 205318941U CN 201521113197 U CN201521113197 U CN 201521113197U CN 205318941 U CN205318941 U CN 205318941U
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- Prior art keywords
- emus
- insulator
- roof
- online
- flashover
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- Expired - Fee Related
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Abstract
The utility model discloses an online protector of EMUs roof insulator flashover electric arc, its constitution is: install rain sensor (6) and air heater (4) on EMUs roof (10), the air outlet of air heater (4) passes through tuber pipe (3) and links to each other with air flow nozzle (1), insulator (8) of EMUs roof are aimed at to the spout of air flow nozzle (1), installation induction type current sensor (5) on the base of insulator (8), induction type current sensor (5), rain sensor (6) and air heater (4) all with data processing and controlling means (7) electric connection. This protector can carry out online flashover electric arc protection to the roof insulator in the operation of EMUs on the way to the safety of flashover electric arc, better assurance EMUs operation takes place for the more effective EMUs roof insulator that prevents.
Description
Technical field
The utility model relates to the online safety guard of a kind of sub-flashover arc of EMUs top insulation.
Background technology
Carry out the key part isolated as EMUs roof hi-line and car body, the operating safety of top insulation is directly connected to the safe and stable operation of EMUs. Owing to EMUs top insulation is exposed outside car, in EMUs operational process, by the impact of Along Railway operating environment, insulator can suffer the invasion and attack of the factors such as sleet, haze, filth, top insulation sub-surface is made to occur that flashover discharges, cause roof high voltage component to car body short circuit, car body current potential lifting, the safety of occupant and electric installation is brought threat, the such as circuit such as Beijing-Tianjin, Shanghai-Hangzhou just once repeatedly occurred that train, in operation way, the sub-flashover discharge accident of top insulation occurred, and the safe operation of EMUs is caused impact. Therefore, the sub-flashover arc electric discharge of EMUs top insulation need to be protected.
Existing operation experience shows that the sub-flashover of top insulation mostly occurs at the weather such as thick fog, drizzle. Correlative study result shows, insulator surface exists filthy, and pollution layer to make moist be the major cause causing the sub-flashover of top insulation. Due to the travelling speed of EMUs, relatively ordinary train speed is higher, the superpotential frequency of Pantograph-OCS system is caused to increase, the filth distribution of top insulation sub-surface changes, and these all make insulator that flashover more easily occurs, and therefore must be protected online by insulator flashover arc.
Owing to top insulation runs in high-voltage (27.5kV) environment, in order to avoid danger of getting an electric shock, insulator surface can not be touched when train charging operation. Contact system mainly, after EMUs terminate operation warehouse-in, is had a power failure by the existing means of defence to the sub-flashover arc of EMUs top insulation, then manually climbs to roof and top insulation carries out surface wiping, cleans. Another is when EMUs during temporary stoppage, utilize water blast gun to be rinsed fast by insulator surface on platform. Two kinds of methods all can reduce the filth of insulator surface, and the suppression sub-flashover of top insulation is had certain effect. But belong to off-line to safeguard, it is necessary to be EMUs warehouse-in or just can carry out when stopping, and in actual moving process, owing to EMUs operation area is wide, station spacing is from length, and in operational process, insulator surface will contamination, form pollution layer and make moist, and then flashover fault occurs. Tradition off-line maintaining method cannot solve this kind of potential safety hazard, therefore needs a kind of device and method that insulator flashover arc can carry out online protection badly.
Practical novel content
Goal of the invention of the present utility model is to provide the online safety guard of a kind of sub-flashover arc of EMUs top insulation, top insulation can be carried out online flashover arc protection by this safety guard in the operation way of EMUs, thus more effective prevent EMUs top insulation from flashover arc occurring, better ensure the safety that EMUs run.
The utility model realizes the technical scheme that its goal of the invention adopts, the online safety guard of a kind of sub-flashover arc of EMUs top insulation, and its composition is:
Being provided with rain sensor and calorifier on EMUs roof, the air port that goes out of calorifier is connected with airflow nozzle by airduct; The insulator of the spout alignment EMUs roof of airflow nozzle; The base of insulator installs induction type current-sensing;
Induction type current-sensing, rain sensor and calorifier all electrically connect with data processing and control device.
Further, the spout of airflow nozzle of the present utility model is also provided with electronic valve, and electronic valve also electrically connects with data processing and control device.
Further, airflow nozzle of the present utility model, the distance of induction type current-sensing, rain sensor and calorifier and insulator is all greater than 40cm.
The utility model is made to carry out the method for flashover arc and working process is:
The leakage current of the insulator that data processing and control device collection induction type current-sensing, rain sensor are measured respectively and rainfall; When leakage current values is greater than the threshold value of setting and rainfall is less than the threshold value of setting, data processing and control device control electronic valve and calorifier is all opened, and hot blast sprays to insulator by airflow nozzle, reduce insulator surface humidity; Otherwise, data processing and control device control electronic valve and calorifier all cuts out.
Compared with prior art, the beneficial effects of the utility model are:
One, the leakage current of insulator is carried out real-time dynamic monitoring by induction type current-sensing by the utility model in EMUs operation way, when insulator leakage current value is greater than setting threshold value and rainfall is less than setting threshold value, show that the existing contamination of insulator surface exists and may make moist, there is the hidden danger that flashover arc occurs, now start calorifier immediately, produce hot blast, and by airflow nozzle, hot blast is sprayed to insulator, rapid reduction insulator surface humidity. When insulator leakage current value is less than setting threshold value, showing that insulator surface is clean, insulating property are good, the utility model does not carry out fence operation, and when rainfall is greater than setting threshold value, insulator surface can be clean by rainwater rapid cleanup, the utility model does not carry out fence operation yet. Thus the utility model can run the timely and effective generation avoiding insulator flashover arc in way at EMUs.
Under thick fog, drizzle weather environment, owing to the sub-ambient humidity of top insulation increases, top insulation sub-surface pollution layer is caused to be infiltrated, insulator makes moist, electric conductivity increases so that insulator leakage current increases, and causes the sub-edge flashing arc-over of top insulation. For the weather that rains heavily, although atmospheric moisture is relatively big, but when rainfall is bigger, due to the souring of rainwater so that insulator surface pollution layer is totally cleaned, not easily there is flashover electric discharge on the contrary. Therefore, simple and reliable the avoiding of the utility model sticks to the pollution layer infiltration of insulator surface, makes moist.
Two, the utility model is dry to insulator leakage current detection, insulator surface blowing hot-air, belongs to non-contact detection and maintenance, it is not necessary to has a power failure, does not affect the normal operation of EMUs.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the online safety guard of the utility model embodiment.
Embodiment
Embodiment
Fig. 1 illustrates, a kind of embodiment of the present utility model is, the online safety guard of a kind of sub-flashover arc of EMUs top insulation, and its composition is:
Being provided with rain sensor 6 and calorifier 4 on EMUs roof 10, the air port that goes out of calorifier 4 is connected with airflow nozzle 1 by airduct 3;The insulator 8 of the spout alignment EMUs roof of airflow nozzle 1; The base of insulator 8 is installed induction type current-sensing 5;
Induction type current-sensing 5, rain sensor 6 and calorifier 4 all electrically connect with data processing and control device 7.
The spout of the airflow nozzle 1 of this example is also provided with electronic valve 2, and electronic valve 2 also electrically connects with data processing and control device 7.
The airflow nozzle 1 of this example, induction type current-sensing 5, rain sensor 6 and calorifier 4 are all greater than 40cm with the distance of insulator 8.
The safety guard of this example is used to carry out the method for flashover arc protection and working process is:
The leakage current of the insulator 8 that data processing and control device 7 gather induction type current-sensing 5, rain sensor 6 is measured respectively and rainfall; When leakage current values is greater than the threshold value of setting and rainfall is less than the threshold value of setting, data processing and control device 7 control electronic valve 2 and calorifier 4 is all opened, and hot blast sprays to insulator 8 by airflow nozzle, reduce insulator 8 surface moisture; Otherwise, data processing and control device 7 control electronic valve 2 and calorifier 4 all cuts out.
In the example method, the setting threshold value of described leakage current values is 10mA, and the setting threshold value of described rainfall is 7mm/min.
Claims (3)
1. an online safety guard for the sub-flashover arc of EMUs top insulation, its composition is:
Being provided with rain sensor (6) and calorifier (4) on EMUs roof (10), the air port that goes out of calorifier (4) is connected with airflow nozzle (1) by airduct (3); The insulator (8) of the spout alignment EMUs roof of airflow nozzle (1); The base of insulator (8) is installed induction type current-sensing (5);
Induction type current-sensing (5), rain sensor (6) and calorifier (4) all electrically connect with data processing and control device (7).
2. the online safety guard of a kind of sub-flashover arc of EMUs top insulation according to claim 1, it is characterized in that: the spout of described airflow nozzle (1) is also provided with electronic valve (2), electronic valve (2) also electrically connects with data processing and control device (7).
3. the online safety guard of a kind of sub-flashover arc of EMUs top insulation according to claim 1, it is characterized in that: described airflow nozzle (1), induction type current-sensing (5), rain sensor (6) and calorifier (4) are all greater than 40cm with the distance of insulator (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521113197.6U CN205318941U (en) | 2015-12-28 | 2015-12-28 | Online protector of EMUs roof insulator flashover electric arc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521113197.6U CN205318941U (en) | 2015-12-28 | 2015-12-28 | Online protector of EMUs roof insulator flashover electric arc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205318941U true CN205318941U (en) | 2016-06-15 |
Family
ID=56198568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521113197.6U Expired - Fee Related CN205318941U (en) | 2015-12-28 | 2015-12-28 | Online protector of EMUs roof insulator flashover electric arc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205318941U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655067A (en) * | 2015-12-28 | 2016-06-08 | 西南交通大学 | Online protecting device for top insulator flashover arc of multiple units and protecting method using online protecting device |
| CN109859909A (en) * | 2019-03-06 | 2019-06-07 | 泉州台商投资区恒鑫隆网络科技有限公司 | A kind of pre- anti-breakdown insulator arrangement of electric pole station local coordinate frame |
-
2015
- 2015-12-28 CN CN201521113197.6U patent/CN205318941U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655067A (en) * | 2015-12-28 | 2016-06-08 | 西南交通大学 | Online protecting device for top insulator flashover arc of multiple units and protecting method using online protecting device |
| CN105655067B (en) * | 2015-12-28 | 2017-06-06 | 西南交通大学 | The online protector and means of defence of the sub- flashover arc of EMUs top insulation |
| CN109859909A (en) * | 2019-03-06 | 2019-06-07 | 泉州台商投资区恒鑫隆网络科技有限公司 | A kind of pre- anti-breakdown insulator arrangement of electric pole station local coordinate frame |
| CN109859909B (en) * | 2019-03-06 | 2020-08-28 | 安徽锦标电气科技有限公司 | Insulator device for preventing breakdown of transformer for telegraph pole station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20181228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |