CN202351381U - Insulation detecting device for service cable - Google Patents
Insulation detecting device for service cable Download PDFInfo
- Publication number
- CN202351381U CN202351381U CN2011204721400U CN201120472140U CN202351381U CN 202351381 U CN202351381 U CN 202351381U CN 2011204721400 U CN2011204721400 U CN 2011204721400U CN 201120472140 U CN201120472140 U CN 201120472140U CN 202351381 U CN202351381 U CN 202351381U
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- cable
- insulating layer
- layer
- inner insulating
- lead
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Abstract
The utility model discloses an insulation detecting device for a service cable, which comprises a cable copper core, a cable inner insulating layer and a shielding layer, wherein an outer portion of the cable copper core are wrapped up by the cable inner insulating layer, the shielding layer is arranged on the outer portion of the cable inner insulating layer and is grounded through a lead, and a sensor is arranged on the lead. According to the insulation detecting device for service cables, the net shielding layer is arranged between the cable inner insulating layer and a cable outer insulating layer. When a material of the cable inner insulating layer is used for a long time and the insulating performance of the material is reduced, the shielding layer can screen static electricity or leakage electric energy. Furthermore, the shielding layer is grounded through the lead, and can output the static electricity or the leakage electric energy timely under a condition that the cable inner insulating layer or the cable outer insulating layer is damaged. The sensor capable of detecting current magnitude is arranged on the lead through which the shielding layer is grounded, so that maintenance personnel can set a current pre-warning value through a controller. When the sensor detects that an actual current value is larger than the current pre-warning value, the controller can send out warning signals and cut off a power supply of the cable.
Description
Technical field
The utility model relates to the pick-up unit of a kind of subway train with service cable, relates in particular to a kind of service cable insulation detection device.
Background technology
In the subway train electric power system, adopt portable service cable usually, and cooperation 1500V power supply is a train power supply.Traditional service cable main body is the copper core, and is wrapped with insulating protective layer in copper core external packets.Ambient humidity is big because the insulation protection layer material is in for a long time, under the heating of copper core consume or other situation abrasion conditions, occur situation such as insulating protective layer peels off, breakage easily.
In train maintaining process; Need the hand-held cable of Maintenance and Repair personnel to operate; The electric power system of train and personnel's safety are the most important things of maintenance work, but cause outside the copper core of cable is exposed to the perhaps long-time use of service cable owing to possibly there is breakage in insulating protective layer; Its insulativity reduces greatly, will cause serious electric shock accidents.And existing electric power system design can not detect the breakage electric leakage situation of cable; Can not carry out Preliminary detection to leaky cable; And send early warning signal timely according to the Preliminary detection result, and bring many inconvenience for the maintenance work of train power supply cable, and dangerous higher.
The utility model content
The purpose of the utility model is to overcome the safety problem in the existing portable service cable maintenance process, and a kind of service cable insulation detection device is provided, and is used for the insulation situation of detection streamer, and can according to circumstances takes the corresponding protection measure.
The purpose of the utility model realizes through following technical proposals:
A kind of service cable insulation detection device comprises the cable inner insulating layer that cable copper core is outside with being wrapped in cable copper core, also comprises and is located at the outside screen layer of cable inner insulating layer, and screen layer is through lead ground connection, and this lead is provided with sensor.
In order to realize the utility model better, the outer wrap of said screen layer is provided with the cable external insulation layer.
Further, said cable inner insulating layer is mainly formed by polyvinylamine or polyolefin or hydrogen fluoride or hydrocarbon made.
Further, said cable external insulation layer is mainly by polychlorodifluoroethylene or gather ethylene-propylene rubber or the polyurethane material manufacturing forms.
In order to realize the insulation situation of automatic detection streamer, and safeguard measure such as when dangerous situation, take to cut off the electricity supply automatically; Said sensor electrical is connected with controller, and controller is electrically connected with dump module, alarm signal module respectively.
As preferably, said screen layer is the netted soft copper filament of electrostatic prevention.
The utility model is compared than prior art, has the following advantages and beneficial effect:
(1) be provided with netted screen layer between cable inner insulating layer of the utility model and the cable external insulation layer, when cable inner insulating layer material during long-time the use, when its insulativity reduced, screen layer can shield static or electric leakage electric energy.And screen layer, can be exported static or electric leakage electric energy under cable inner insulating layer or the damaged situation of cable external insulation layer through lead ground connection in time, prevents to cause harm such as short circuit or fire.
(2) on the lead of shielding layer grounding, also be provided with the sensor that can detect size of current, sensor is electrically connected with controller.Electric current early warning value when the maintainer can be provided with security maintenance through controller; The actual current value that arrives when sensor is during greater than the electric current early warning value; Controller can start the dump module that is electrically connected with it, and dump module controls power supply stops to be cable power supply.And controller can also start the alarm signal module that is electrically connected with it, and the alarm signal module is sent dangerous alarm signal, and the repair and maintenance personnel can detect the cable leakage situation in time, and have avoided the Danger Electric shock risk that possibly exist.
(3) this service cable novel structure, safe can mask the less static of electric weight, can detect the electric leakage situation of cable again in time, has protected repair and maintenance personnel's personal safety, has improved staff's work efficiency.
Description of drawings
Fig. 1 is the cut-open view of the utility model;
Fig. 2 is the theory structure block diagram of present embodiment.
Wherein, the pairing name of the Reference numeral in the accompanying drawing is called:
1-cable copper core, 2-cable inner insulating layer, 3-screen layer, 4-cable external insulation layer, 5-cable shield layer signal, 6-sensor, 7-controller, 8-dump module, 9-alarm signal module.
Embodiment
Below in conjunction with embodiment the utility model is done to specify further:
Embodiment
Like Fig. 1～shown in Figure 2; A kind of service cable insulation detection device; The cable inner insulating layer 2 that the cable copper core 1 that comprises cylindrical shape is outside with being wrapped in cable copper core 1, cable inner insulating layer 2 are mainly formed by polyvinylamine or polyolefin or hydrogen fluoride or hydrocarbon made.Also comprise the screen layer 3 of being located at cable inner insulating layer 2 outsides, screen layer 3 is the netted soft copper filament of electrostatic prevention, the reticulate texture that this netted soft copper filament forms for the copper material manufacturing.Screen layer 3 is through lead ground connection, and this lead is provided with sensor 6.
The outer wrap of screen layer 3 is provided with cable external insulation layer 4.Cable external insulation layer 4 is mainly by polychlorodifluoroethylene or gather ethylene-propylene rubber or the polyurethane material manufacturing forms.
As shown in Figure 2, sensor 6 is electrically connected with controller 7, and controller 7 is electrically connected with dump module 8, alarm signal module 9 respectively.
The outside of cable copper core 1 is provided with dielectric layers; Be respectively cable inner insulating layer 2 and cable external insulation layer 4; And between dielectric layers, also be provided with screen layer 3, screen layer 3 is through line-to-ground, and screen layer 3 can mask some static; And can be transported to ground to the electric energy of electric leakage in time, can avoid staff's harm of getting an electric shock effectively.The lead of screen layer 3 ground connection is provided with sensor 6.
Insulation course between screen layer 3 and cable copper core 1 can be regarded as the resistance that resistance is very big with it.Sensor 6 can detect the electric leakage electric power signal of screen layer 3 to ground, and analysis obtains cable shield layer signal 5.And can this cable shield layer signal 5 be transferred in the controller 7.Controller 7 compares detected signal and preset alarming value.If detection signal has surpassed alarming value, then controller 7 control startup alarm signal modules 9 are sent alarm signal, and start dump module 8, and the supporting power supply of cable is stopped power supply.This sensor 6 is a current sensor, can detect the current information on the earth lead.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (4)
1. service cable insulation detection device; Comprise cable copper core (1) and be wrapped in the outside cable inner insulating layer (2) of cable copper core (1); It is characterized in that: also comprise and be located at the outside screen layer (3) of cable inner insulating layer (2); Screen layer (3) is through lead ground connection, and this lead is provided with sensor (6).
2. according to the described service cable insulation detection device of claim 1, it is characterized in that: the outer wrap of said screen layer (3) is provided with cable external insulation layer (4).
3. according to the described service cable insulation detection device of claim 1, it is characterized in that: said sensor (6) is electrically connected with controller (7), and controller (7) is electrically connected with dump module (8), alarm signal module (9) respectively.
4. according to claim 1 or 2 described service cable insulation detection devices, it is characterized in that: said screen layer (3) is the netted soft copper filament of electrostatic prevention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204721400U CN202351381U (en) | 2011-11-24 | 2011-11-24 | Insulation detecting device for service cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204721400U CN202351381U (en) | 2011-11-24 | 2011-11-24 | Insulation detecting device for service cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351381U true CN202351381U (en) | 2012-07-25 |
Family
ID=46540377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204721400U Expired - Fee Related CN202351381U (en) | 2011-11-24 | 2011-11-24 | Insulation detecting device for service cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202351381U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389437A (en) * | 2013-07-31 | 2013-11-13 | 国家电网公司 | Device and method for monitoring shielding current of secondary control cable of transformer substation in real time |
| CN103592586A (en) * | 2013-11-27 | 2014-02-19 | 国家电网公司 | Power cable insulation monitoring system |
| CN103630813A (en) * | 2013-12-05 | 2014-03-12 | 国网上海市电力公司 | Solid insulated conductor insulation electrified monitoring method |
| CN108627738A (en) * | 2017-03-16 | 2018-10-09 | 宝钢特钢有限公司 | A kind of on-Line Monitor Device and monitoring method for monitoring electroslag furnace water-cooled cable |
-
2011
- 2011-11-24 CN CN2011204721400U patent/CN202351381U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389437A (en) * | 2013-07-31 | 2013-11-13 | 国家电网公司 | Device and method for monitoring shielding current of secondary control cable of transformer substation in real time |
| CN103592586A (en) * | 2013-11-27 | 2014-02-19 | 国家电网公司 | Power cable insulation monitoring system |
| CN103630813A (en) * | 2013-12-05 | 2014-03-12 | 国网上海市电力公司 | Solid insulated conductor insulation electrified monitoring method |
| CN103630813B (en) * | 2013-12-05 | 2016-08-31 | 国网上海市电力公司 | A kind of method of solid insulation conductor insulation live monitoring |
| CN108627738A (en) * | 2017-03-16 | 2018-10-09 | 宝钢特钢有限公司 | A kind of on-Line Monitor Device and monitoring method for monitoring electroslag furnace water-cooled cable |
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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: 20120725 Termination date: 20141124 |
|
| EXPY | Termination of patent right or utility model |