A kind of light current insulating cylinder
Technical field
A kind of insulator arrangement is the utility model is related to, more particularly to a kind of insulating cylinder of light current.
Background technology
With the continuous improvement of China's voltage class of electric power system, air insulating device has obtained relatively broad application,
Such as gas insulating enclosed switch equipment (GIS), gas-insulated transformer (GIT) and gas-insulated metal closed power transmission line
(GIL), three is more is used as primary insulation medium using SF6.Compared with traditional open power distribution equipment, air insulating device has body
Product is small, floor space is few, be not affected by the external environment, dielectric strength is high, audible noise is low, is grown without fire hazard, time between overhauls(TBO)
It is high reliability, high security, low-maintenance, even non-maintaining symbol with the advantage such as maintenance is few.China is vast in territory, energy
Source is laid in and the distributed pole of electric load is unbalanced, is badly in need of the energy and the trans-regional of electric power is flowed on a large scale, and direct current transportation side
Formula is to realize one of means the most economic in Large Copacity, high voltage, long distance power transmission in the world at present.HVDC it is quick
Development has become the important trend of China's power network development, and application demand of the air insulating device in HVDC also increasingly expands
Greatly.But unlike that the application in AC system, air insulating device is applied still has some urgently in straight-flow system
Solve the problems, such as.
In AC system, air insulating device insulating cylinder edge flashing is the most common failure of equipment.Cause gas exhausted
The reason for edge apparatus insulated cylinder edge flashing, is a lot, wherein most of can be able to by the improvement of device fabrication, mounting process
Reduction largely, in addition it is final eliminate, but the edge flashing as caused by being built up insulating cylinder surface charge be but difficult
Eliminated in the design of equipment, manufacture link.During air insulating device is run, its built-in electrical insulation cylinder can be because of long-term high electricity
The effect of pressure and substantial amounts of electric charge is built up on surface, these electric charges can distort insulating cylinder along the original Electric Field Distribution in face, cause absolutely
The decline of edge cylinder edge flashing voltage.However, such phenomenon in straight-flow system, do not obtain not only improving it is tighter on the contrary
Weight, become the key issue for hindering air insulating device to be applied in high-voltage direct current.
Nowadays use silastic material make umbrella sheath compound inslation cylinder be used in large quantities transmission line of electricity with
And in various electrical equipments, wherein just including fuse, particularly high-tension fuse.The compound inslation cylinder that fuse uses at present
Umbrella sheath be generally made using injection molding technique, the structure of existing fuse compound inslation cylinder was using
It can meet to require substantially in journey, can also be by some conventional experiments, however, when the more stringent runner test of progress
When, the fuse compound inslation cylinder of existing this structure can not often pass through experiment.
Build up the research of phenomenon for insulating cylinder surface charge both at home and abroad at present, majority also rests on:Using simplified exhausted
Edge cylinder mould type carries out substantial amounts of surface charge and builds up experiment, then explains experimental phenomena therein by correlation theory or hypothesis.
In many experiments that at home and abroad scholar is carried out, however it remains many deficiencies:Insulating cylinder model uses more is easy to the thin of measurement
Piece cylinder, experiment is more to be carried out in low pressure air, and these are serious not with insulation situation actual inside air insulating device
Symbol;Domestic and foreign scholars are more to be arranged on experiment tank interior by charge detecting device, and this is greatly increased needed for experiment tank body
Size, substantial amounts of gas is consumed, add the cost tested every time;Surface charge measuring system can only the specific shape of scanning survey
The insulating cylinder model of shape, it is not easy to carry out substantial amounts of experimental study.In order in depth study insulating cylinder surface charge clustering phenomena,
Shorten the lead time of DC gas insulated equipment, promote the practical of D.C. isolation cylinder, it is necessary to existing surface electricity
Lotus measuring system carries out many improvement, can it is safer, more economic insulating cylinder surface charge is surveyed
Amount.
Existing transmission of electricity power distribution circuit all employs insulated conductor, and they solve the peace such as electric current corridor that bare conductor originally has
Full problem, but whole electric line is produced fortune because the overvoltage caused by reason such as thunderbolt breaks in actual use
The situation of row failure happens occasionally, especially southern region of China, lightning flashes and thunder rumbles meteorology it is more frequent, therefore caused by electricity
Net failure has accounted for the 36.8% of whole line fault, and wherein lightning-caused breaking rate accounts for 96.8%, leverages the normal of gauze
Power supply, huge loss is caused to national economy.Therefore must solve insulated conductor disconnection problem caused by overvoltage,
It can guarantee that the safe operation of overhead insulating transmission and distribution network.
Existing compound pillar zinc oxide lightning protection insulating cylinder, connected by internal clearance group with zinc oxide resistance sheet, interior electrode company
Connect, outer envelope silastic material, upper end gold utensil is electrode, and lower end installation bolt passes through metallic support or wire ground group
Into.But the lightning protection insulating cylinder of such a structure, when being struck by lightning by multiple or direct attack, insulating cylinder internal gas drastically expands, Yi Chong
Karat gold has or destroyed epoxy cylinder, causes lightning protection insulating cylinder to damage, and because the obvious mark of damage nothing, inspection attendant are not easy to send out
The lightning protection insulating cylinder damaged, the safe operation to distribution line bring hidden danger, it is necessary to be improved.
Circuit junction in the light current circuit such as communication and optical fiber needs to carry out insulation protection, and current insulating cylinder
Its requirement can not be met, therefore, it is necessary to develop the new insulating cylinder for light current circuit.
Utility model content
The purpose of this utility model be to provide it is a kind of simple in construction, it is quick for installation, overhaul convenient light current insulating cylinder.
To achieve the above object, the utility model adopts the following technical scheme that:A kind of light current insulating cylinder, including sleeve, cylinder
Bottom, cover, sleeve are in hollow cylindrical, and cylinder bottom and cover are located at the both ends of sleeve, respectively set on cylinder bottom and cover respectively
There is through hole, cylinder bottom and the junction of cover and sleeve are respectively provided with flange;Sleeve is made of magnetic conductive metal material, cylinder bottom
It is made with cover of metallic aluminum material;Sleeve inner is provided with connecting portion;Cartridge exterior is coated with electrophoretic material.
Further, cylinder bottom and the center of circle of the through hole on cover point-blank, and overlap with the axis of sleeve.
Further, cylinder bottom is provided with several fastening bolts.
Further, sleeve lining applies ZnO resistors, and flange is silastic material.
The beneficial effects of the utility model:The utility model provides a kind of breaking line preventive insulating cylinder of light current circuit, its band
There are obvious fault cues function and hidden danger of not falling;Insulating cylinder intensity is higher, and insulation effect is good, than existing insulating cylinder more
Add safe and reliable.It is simple in construction, cost is relatively low, action is fast, greatly simplified the operation of line maintenance, reduced outage time
And economic loss, improve communication quality.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment.
In figure, 1, sleeve, 2, cylinder bottom, 3, cover, 4, through hole, 5, flange, 6, fastening bolt.
Embodiment
For the technical characterstic for illustrating this programme can be understood, below by an embodiment, and its accompanying drawing is combined, it is right
This programme is illustrated.
To achieve the above object, the utility model adopts the following technical scheme that:A kind of light current insulating cylinder, including sleeve 1, cylinder
Bottom 2, cover 3, sleeve 1 are in hollow cylindrical, and cylinder bottom 2 and cover 3 are equal on the both ends of sleeve 1, cylinder bottom 2 and cover 3 respectively
The junction for being respectively arranged with through hole 4, cylinder bottom 2 and cover 3 and sleeve 1 is respectively provided with flange 5;Sleeve 1 is using magnetic conduction gold
Category material is made, and cylinder bottom 2 and cover 3 are made of metallic aluminum material;The inside of sleeve 1 is used for the He of connecting cylinder bottom 2 provided with connecting portion
Cover 3;The external spray of sleeve 1 has electrophoretic material.
Cylinder bottom 2 and the center of circle of the through hole 5 on cover 3 point-blank, and overlap with the axis of sleeve 1;Cylinder bottom 2 is set
It is equipped with several fastening bolts 6;The inwall of sleeve 1 applies ZnO resistors, and flange 5 is silastic material.
Application method of the present utility model is:The insulating cylinder is arranged in the junction of communication conductor, wire draws from through hole
Enter the inside to insulating cylinder, complete wiring and winding work in sleeve inner, using flange and fixing screws fixing seal, have
Higher intensity and anti-lightning performance.Pulled apart in the event of force majeure factor or by huge external force, wire in communication line
Junction disconnect, the overlapping splice after disconnection, will not be exposed inside insulating cylinder, will not cause electric leakage or second accident,
Simultaneously as sleeve is made up of insulating materials, the weak current being also prevented from wire leaks, ensure construction repair personnel and
The safety of passerby;Sleeve inner is provided with electrophoretic material, and disconnecting the electric current in the wire of overlap joint can make the material photosensitive, prompts
Construction repair personnel is repaired or changed, and drastically increases the efficiency of maintenance.The utility model provides a kind of light current
The breaking line preventive insulating cylinder of circuit, it carries obvious fault cues function and hidden danger of not falling;Insulating cylinder intensity is higher, insulation
Effect is good, more safe and reliable than existing insulating cylinder.It is simple in construction, cost is relatively low, action is fast, greatly simplified circuit inspection
The operation repaiied, reduces outage time and economic loss, improves communication quality.