CN205901237U - Real -time protection device of cable sheath - Google Patents
Real -time protection device of cable sheath Download PDFInfo
- Publication number
- CN205901237U CN205901237U CN201620880880.0U CN201620880880U CN205901237U CN 205901237 U CN205901237 U CN 205901237U CN 201620880880 U CN201620880880 U CN 201620880880U CN 205901237 U CN205901237 U CN 205901237U
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- Prior art keywords
- cable
- ground wire
- disconnector
- hole
- cable sheath
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Abstract
The utility model discloses a real -time protection device of cable sheath, weave the ground wire including cable sheath protector, disconnector, resin bracket and copper, cable sheath protector's high -voltage connection end is connected with cable termination's copper shield ground wire and steel armour ground wire respectively through the nut, cable sheath protector's earthing pole passes the screw hole threaded connection on shoulder hole and disconnector top, the ground wire was woven to copper one end pass through the nut with the ground connection metal screw rod fixed connection of disconnector bottom, the other end is connected with the tower grounding cross arm through the bolt that passes the through -hole. The utility model discloses when cable sheath protector took place the carbomorphism and punctures, the return circuit was cuted in the disconnector explosion, can not arouse electrically conductive generating heat and cable accident, the expansion of avoid accident to economic loss has been reduced.
Description
Technical field
This utility model is related to field of cable technology, particularly a kind of cable sheath protection device.
Background technology
Electric railway traction net 27.5kv cable and national grid 35kv single-core cable, being in operation can be to cable copper screen
Cover layer and steel armour produces impacting with high pressure, and then single-core cable and cable termination are caused damage.Cable protective layer protector foundation sets
Meter parameter has bears the limit, and when bearing excess impact (switching overvoltage, lightning strike induction voltage etc.), cable sheath is protected
Device bursts or carbonization punctures, and cable protective layer protector is in permanent conduction state.If cable two ends copper shield and steel armour all connect
Ground conducting, then form big loop current, makes transition joint on cable, cable and terminals heating, cause cable or centre,
Terminals breakdown accident.Install cable protective layer protector (inside is equipped with a zinc oxide valve plate) in single-core cable end additional, it leads to
Cross the copper shield ground wire of cable termination and steel armour ground wire is connected on cable of copper shield layer and steel armour, the copper shield of whole piece cable
It is directly grounded with steel armour one end, the other end is grounded by cable protective layer protector again, cable protective layer protector rushes suffering from high pressure
Transient switching when hitting, at ordinary times for cut-off state.
When cable protective layer protector occurs carbonization to puncture, its outward appearance is simultaneously unchanged, and inside is but because of the generation of loop current
And conductive exothermal, ultimately result in high tension cable and cable termination breakdown accident, operating maintenance personnel cannot send out in whole process
Process now and in time, have the accidents caused danger expanding.
Utility model content
Technical problem to be solved in the utility model be provide one kind can make maintainer find in time cable fault with
Just prevent the cable sheath real-time guard device that fault spreads.
For solving above-mentioned technical problem, this utility model be the technical scheme is that
A kind of cable sheath real-time guard device, weaves ground including cable protective layer protector, disconnector, resin rack and copper
Line；The high-voltage terminal of cable protective layer protector is connected with the copper shield ground wire of cable termination and steel armour ground wire respectively by nut
Connect；The earthing pole of cable protective layer protector is threadeded through shoulder hole with the screwed hole on disconnector top；Described copper braiding ground
One end of line is fixedly connected with the grounded metal screw rod of described disconnector bottom by nut, and the other end is by the spiral shell through through hole
Bolt is connected with tower grounding cross-arm；The left end of described resin rack is provided with through hole, and right-hand member is provided with shoulder hole；Described shoulder hole with
The earthing pole of cable protective layer protector is adapted；Described resin rack is by being bolted to tower grounding cross-arm through through hole
On.
Above-mentioned protection device, the outside of described resin rack is provided with projection.
This utility model structure is simple, easy for installation, and when cable protective layer protector occurs carbonization to puncture, disconnector explodes
Block loop, conductive exothermal and cable fault will not be caused, substantially, maintainer can find event to field failure sign in time simultaneously
Hinder and keep in repair replacing part, expanding of Accident prevention, decrease economic loss.
Brief description
Fig. 1 is this utility model structural representation；
Fig. 2 is disconnector internal structure schematic diagram；
Fig. 3 is cable terminal structure schematic diagram.
The each label of in figure is expressed as, and 1, cable protective layer protector, 1-1, high-voltage terminal, 1-2, earthing pole, 2, de-
From device, 2-1, metal screw, 2-2, insulation crust, 2-3 disconnector cavity, 2-4, screwed hole, 2-5, metal spring, 2-6, resistance
Piece, 2-7, empty booster, 2-8, pad, 2-9, empty booster groove, 3, resin rack, 3-1, through hole, 3-2, shoulder hole, 3-3, projection,
4th, bolt, 5, copper braiding ground wire, 6, cable termination, 6-1, copper shield ground wire, 6-2, steel armour ground wire.
Specific embodiment
Below according to Fig. 1-3 and embodiment, this utility model is illustrated.
The present embodiment includes cable protective layer protector 1, disconnector 2, resin rack 3 and copper braiding ground wire 5；
The insulation crust 2-2 top of disconnector 2 is provided with tool female screwed hole 2-4, the insulation crust 2- of disconnector 2
2 bottoms are provided with through hole, and metal screw 2-1 passes through the through hole of insulation crust 2-2 bottom to be connected to insulation crust 2-2 bottom；Metal
Screw rod 2-1 top center is provided with sky booster groove 2-9, and empty booster 2-7 is arranged in sky booster groove 2-9, and empty booster 2-7 is provided with electricity
Resistance piece 2-6, be provided with pad 2-8 between empty booster 2-7 and resistor disc 2-6, metal spring 2-5 be arranged on screwed hole 2-4 bottom with
Between resistor disc 2-6.
The left end of described resin rack 3 is provided with through hole 3-1, and right-hand member is provided with shoulder hole 3-2；Described shoulder hole 3-2 and cable
The earthing pole 1-2 of sheath protector 1 is adapted；Described resin rack 3 is fixed on shaft tower by the bolt 4 through through hole 3-1 and connects
On ground cross-arm；The high-voltage terminal 1-1 of cable protective layer protector 1 passes through the nut copper shield ground wire 6-1 with cable termination 6 respectively
It is connected with steel armour ground wire 6-2；The earthing pole 1-2 of cable protective layer protector 1 passes through the spiral shell of shoulder hole 3-2 and disconnector 2 top
Pit 2-4 is threaded；Described copper weaves the grounded metal screw rod by nut and described disconnector 2 bottom for the one end of ground wire 5
2-1 is fixedly connected, and the other end is connected with tower grounding cross-arm by the bolt 4 through through hole 3-1.
The outside of described resin rack 3 is provided with raised 3-3, and raised role is to increase creep age distance.
Model bhq-9.0/600 of cable protective layer protector 1；Model rbt-100/600 of disconnector 2.
Cable protective layer protector 1 is as protection location using high energy heavy in section resistor disc, and overcoat conduct suppressed by silicone rubber
External insulation, is provided with raised 3-3 outside silicone rubber compacting overcoat.Cable protective layer protector 1 has that impact resistance is strong, protection feature
Good, smooth and beautiful appearance, anti-soil, ageing-resistant, non-maintaining the advantages of, and the line-frequency induction electricity in cable run metal sheath can be limited
Stream, can reduce rapidly power-frequency overvoltage and the impulse overvoltage in cable run metal sheath.In cable run normal work shape
During state, high tension cable sheath protector 1 is in high resistance state, blocks the line-frequency induction current loop in cable metal sheath；When
Earth fault in cable run, and lightning surge or switching overvoltage lead to the very high power frequency of cable metal sheath appearance excessively electric
When pressure or impulse overvoltage, high tension cable sheath protector 1 presents low resistance conduction state, makes dash current through cable sheath
Protector 1 spews out into rapidly the earth, plays the effect of protection protective coverings of cable insulation, and disconnector does not act on；When power frequency is excessively electric
Pressure or impulse overvoltage excess impact cable protective layer protector 1 and when so that cable protective layer protector 1 is punctured or burst, disconnector wink
Between action, disconnect earth-return circuit it is ensured that cable sheath does not have circulation to pass through, simultaneously facilitate maintainer and find fault tieing up in time
Repair replacing part.Heat-explosion type disconnector 2 is to produce electric arc in disconnector using the power frequency short circuit current flowing through, and ignites empty booster
To reach disengaging purpose.
After cable protective layer protector 1 punch through damage, disconnector 2 is blown, and disconnector 2 lower copper braiding ground wire is sagging, whole
Individual loop disconnects.This utility model can prevent the generation of loop current, stops fault spread, meanwhile, be easy to track walker and find,
Change a whole set of protector in time.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit other embodiment party of the present utility model
Formula, all any equivalent modifications done within core technology of the present utility model, replacement etc., should be included in this utility model
Protection domain within.
Claims (2)
1. a kind of cable sheath real-time guard device it is characterised in that: include cable protective layer protector (1), disconnector (2), tree
Fat bracket (3) and copper braiding ground wire (5)；
The high-voltage terminal (1-1) of cable protective layer protector (1) passes through the nut copper shield ground wire with cable termination (6) respectively
(6-1) it is connected with steel armour ground wire (6-2)；The earthing pole (1-2) of cable protective layer protector (1) passes through shoulder hole (3-2) and takes off
Screwed hole (2-4) from device (2) top is threaded；
One end that described copper weaves ground wire (5) is fixing with the grounded metal screw rod (2-1) of described disconnector (2) bottom by nut
Connect, the other end is connected with tower grounding cross-arm by the bolt (4) through through hole (3-1)；
The left end of described resin rack (3) is provided with through hole (3-1), and right-hand member is provided with shoulder hole (3-2)；Described shoulder hole (3-2) with
The earthing pole (1-2) of cable protective layer protector (1) is adapted；Described resin rack (3) is by the bolt through through hole (3-1)
(4) it is fixed on tower grounding cross-arm.
2. a kind of cable sheath real-time guard device according to claim 1 it is characterised in that: described resin rack (3)
Outside be provided with raised (3-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620880880.0U CN205901237U (en) | 2016-08-15 | 2016-08-15 | Real -time protection device of cable sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620880880.0U CN205901237U (en) | 2016-08-15 | 2016-08-15 | Real -time protection device of cable sheath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205901237U true CN205901237U (en) | 2017-01-18 |
Family
ID=57781521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620880880.0U Active CN205901237U (en) | 2016-08-15 | 2016-08-15 | Real -time protection device of cable sheath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205901237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099819A (en) * | 2016-08-15 | 2016-11-09 | 保定合力达电缆附件有限公司 | A kind of cable sheath protection device |
-
2016
- 2016-08-15 CN CN201620880880.0U patent/CN205901237U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099819A (en) * | 2016-08-15 | 2016-11-09 | 保定合力达电缆附件有限公司 | A kind of cable sheath protection device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |