CN106469594B - Bushing shell for transformer - Google Patents
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- CN106469594B CN106469594B CN201510512180.6A CN201510512180A CN106469594B CN 106469594 B CN106469594 B CN 106469594B CN 201510512180 A CN201510512180 A CN 201510512180A CN 106469594 B CN106469594 B CN 106469594B
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Abstract
Bushing shell for transformer includes being set in two high voltage insulation structures outside conducting rod, and two high voltage insulation structures are equipped with the compartments such as high pressure, is axially coaxial docking fixation by respective ground connection flange；Each high voltage insulation structure includes insulating sleeve and stress set, insulating sleeve is set in outside conductor, the insulating space of closing is formed between insulating sleeve and conductor, high pressure equipotential screen is inlaid on insulating sleeve inner surface, conductor is electrically connected with high pressure equipotential screen, the compartments such as the high pressure of dielectric need not be filled by being formed between high pressure equipotential screen and conductor, conductor is coated with insulating layer of conductor, stress set is sleeved on the one end for being located at insulating space on conductor, insulating sleeve inner surface is closely crimped with stress set, the ground connection flange of insulating sleeve one end is connected with stress set grounded part, high pressure equipotential screen extends to stress set top surface by the insulating space other end；Insulating sleeve makes the gap between conductor and insulating sleeve that need not fill dielectric for the compartments such as capacitor type insulating sleeve, high pressure.
Description
Technical field
The present invention relates to high-voltage electrical appliances fields, are related to a kind of insulation system of mesohigh arrangements of electric connection, and in particular to adopt
With the cable termination of high voltage insulation structure, busbar, bushing and bushing shell for transformer.
Background technology
It is well known that the positions such as outdoor, indoor and GIS in electric system, in order to which mesohigh circuit is made to pass through obstacle
Object (such as housing of wall, floor, the cabinet of switchgear, transformer and breaker) or in order to keep mesohigh circuit pair
Be grounded object insulation, a kind of mesohigh arrangements of electric connection that need to be used, as bushing shell for transformer, wall bushing, cable termination, absolutely
Edge busbar etc..Mesohigh arrangements of electric connection of the present invention, just refer to these bushing shell for transformer, wall bushing, cable termination,
The general name of the products such as busbar.
By taking existing cable termination as an example, it generally comprises the stress cone that improvement cable termination Root Stress is concentrated and (also cries
Stress set), insulating sleeve (may be insulator or resin bushing) and dielectric (liquid or gas full of inner space
Body), wherein：The effect of stress cone is to improve cable root electric field strength, reduces stress concentration；The effect of insulating sleeve is to contain
Stress cone and dielectric, and support cable terminal and increase outer creepage distance, the upper flange of the end of insulating sleeve is fixed
In the end of cable conductor, the lower flange of insulating sleeve root is fixed at the ground connection of cable sheath.But due to insulating sleeve end
Portion is in high potential, and root is in ground potential, and interior point electric field strength is all higher, in the air gap between sleeve and cable very
Electric discharge (including breakdown, flashover or shelf depreciation) is easily generated, and causes insulation damages, so dielectric must be filled,
It can guarantee dielectric strength and partial discharge quantity made to be reduced under standard, could ensure safety in longtime running.
By taking existing GIS casings as an example, generally include conducting rod, the stress cone being sleeved on outside conducting rod, contain conducting rod and
The insulating sleeve of stress cone；Or the condenser type insulating sleeve including conducting rod and containing conducting rod；Or there is conduction simultaneously
Bar, stress cone and condenser type insulating sleeve；Regardless of it is that structure need to usually be filled in the space of conducting rod and insulating sleeve
Completely insulate silicone grease/oil, SF6 gases or filled solid insulant such as epoxy resin.
By taking existing isolated bus as an example, conductor and the insulating sleeve being coated on outside conductor are generally included, insulating sleeve is excellent
Choosing is using condenser type insulating sleeve, and conductor can be tubular shape conductor or conductive rod, in conductor and insulating sleeve usually
It need to fill full of solid insulator such as epoxy resin.
In conclusion existing arrangements of electric connection, the insulator or extrude solid insulation that insulating sleeve is either fired
Manufactured resin bushing to solve the problems, such as to discharge caused by its air gap, must fill absolutely between insulating sleeve and conductor
Edge medium (such as transformer oil, SF6 gases).And it is pretty troublesome one that dielectric is filled when installing insulating sleeve at the scene
Thing will not only ensure clean environment, it is also necessary to use more equipment and more complicated technique.And dielectric after running
Leakage is likely to result in, if oil leak may cause fire, if postrun SF6 gases leak, it is also possible to cause ring
Border is polluted or personnel are poisoned or even cause to explode, and threatens the safety of personal safety and equipment.If dielectric is production
The solid insulator of filling can then greatly increase the weight of product and manufacture cost, for example, one is filled with solid dielectric insulation
The capacitive bushings shell for transformer of 10KV weight up to more than 100 kilograms, cost is very high, and the present invention one be not filled with dielectric
The weight of the capacitive bushings shell for transformer of 10KV only has about 20 kilograms, and cost substantially reduces.
The content of the invention
The defects of it is an object of the invention to overcome the prior art, provide it is a kind of it is simple in structure, at low cost, reliability is high
High voltage insulation structure and the mesohigh arrangements of electric connection using above-mentioned high voltage insulation structure.
To achieve the above object, present invention employs following technical solutions：
A kind of high voltage insulation structure, including insulating sleeve, insulating sleeve is set in outside conductor, insulating sleeve and conductor it
Between form the insulating space of closing, high pressure equipotential screen is inlaid on insulating sleeve inner surface, conductor is electrically connected with high pressure equipotential screen
It connects, the compartments such as the high pressure of dielectric need not be filled by being formed between high pressure equipotential screen and conductor.
Preferably, stress set is further included, conductor is coated with insulating layer of conductor, and stress set, which is sleeved on conductor, is located at insulation sky
Between one end, insulating sleeve inner surface and stress set closely crimps, and the high pressure equipotential screen is extended to by the insulating space other end
Stress covers top surface.
Preferably, the upper flange for being fixedly connected with conductor and insulating sleeve for being arranged on insulating sleeve one end and setting are further included
Earthing or grounding means on insulating sleeve, conductor are electrically connected by upper flange with high pressure equipotential screen, and the high pressure equipotential screen is by upper method
Orchid extends to stress set top surface.
Preferably, stress set, upper flange and ground connection flange, upper flange is further included to consolidate insulating sleeve one end with conducting rod
Fixed, stress set is set on conductor, and insulating sleeve contains stress set and mutually close crimping, the ground connection method of the insulating sleeve other end
Blue to be connected with stress set grounded part, high pressure equipotential screen extends to stress set top surface by upper flange.
Preferably, the compartments electric field intensity inside high such as high pressure is zero, and each point current potential is identical in the compartments such as high pressure.
Preferably, the insulating sleeve is capacitor type insulating sleeve, is also embedded in the insulating layer of capacitor type insulating sleeve
Multiple capacitance plates insulated from each other, wherein outermost capacitance plate is earthy earthing, earthing and high voltage insulation structure
Earthing or grounding means connection, the high pressure equipotential screen is between multiple capacitance plates and conductor.
The present invention also provides cable termination, busbar, bushing and the transformer sets using above-mentioned high voltage insulation structure
Pipe.
The bushing shell for transformer of the present invention, including above-mentioned the first high voltage insulation structure and the second high voltage insulation structure, first
High voltage insulation structure and the second high voltage insulation structure are equipped with the compartments such as high pressure, the first high voltage insulation structure and the second high-voltage isulation
Structure is axially coaxial docking fixation, is set in jointly outside conductor；Second high voltage insulation structure can be stretched into transformer shell body with becoming
Depressor connects, and the first high voltage insulation structure is externally provided with full skirt.
The high voltage insulation structure for being not filled with dielectric of the present invention forms high pressure equipotential between conductor and insulating sleeve
Storehouse makes the gap between conductor and insulating sleeve that need not fill dielectric, ensure dielectric strength, shelf depreciation figureofmerit and
On the premise of the reliability of performance, product weight is significantly reduced, reduce manufacture cost and improves production and installation effectiveness.
Description of the drawings
Fig. 1 is a kind of structure diagram of cable termination of first embodiment of the present invention；
Fig. 2 is a kind of structure diagram of bushing shell for transformer of second embodiment of the present invention；
Fig. 3 is a kind of structure diagram of isolated bus of 3rd embodiment of the present invention.
Specific embodiment
With reference to the embodiment that Fig. 1 and Fig. 2 are provided, the specific implementation of the high voltage insulation structure further illustrated the present invention
Mode.The high voltage insulation structure of the present invention is not limited to the following description.
The high voltage insulation structure of the present invention, including insulating sleeve, insulating sleeve, which can be set in, is coated with leading for conductor insulation
Body (cable conduction core 7, conducting rod 1 ') outside, forms the insulating space of closing, in insulating sleeve between insulating sleeve and conductor
High pressure equipotential screen is inlaid on inner surface, conductor is electrically connected with high pressure equipotential screen, the shape between high pressure equipotential screen and conductor insulation
Into compartments such as the high pressures that need not fill dielectric.Insulating sleeve, which further includes, to be arranged on insulating sleeve one end and leads for being fixedly connected
The upper flange of body and insulating sleeve, is arranged on the earthing or grounding means for ground connection of the insulating sleeve other end, and earthing or grounding means is preferably
Flange is grounded, while can be used for being fixedly connected with other devices, high pressure equipotential screen extends to the other end by insulating space one end,
The compartments electric field intensity inside high such as high pressure is zero, and each point current potential is identical in the compartments such as high pressure.It can also be equipped with and use in high voltage insulation structure
In the stress set pressed, stress set is sleeved on the one end for being located at insulating space on conductor, and insulating sleeve inner surface and stress set are close
Crimping, the high pressure equipotential screen extend to stress set top surface by the insulating space other end.Further insulating sleeve is capacitive exhausted
Edge sleeve, also embedded with multiple capacitance plates insulated from each other in the insulating layer of capacitor type insulating sleeve, wherein outermost capacitance
Shield for earthy earthing, the high pressure equipotential screen is between multiple capacitance plates and conductor.The high-voltage isulation of the present invention
Structure carries out insulation protection to conductor, suitable for the insulation protection of the arrangements of electric connection of high-tension circuit, especially suitable for ground connection
The insulation protection of object and the high pressure arrangements of electric connection used, such as bushing shell for transformer, wall bushing, cable termination, are also applied for
The products such as the relatively lower isolated bus of voltage class.It is different from the insulation system of the high pressure arrangements of electric connection of the prior art
It is insulating sleeve and inner conductor (cable conduction core, conductive core, the conduction of high pressure arrangements of electric connection insulation system of the invention
Pipe) between gap need not fill dielectric, before the reliability of dielectric strength, shelf depreciation figureofmerit and performance is ensured
It puts, significantly reduces product weight, reduces manufacture cost and improve production and installation effectiveness
Embodiment one
As shown in Figure 1, a kind of capacitance type cable terminal for being not filled with dielectric of the present invention, including conducting rod 1, stress
Set 2 has upper flange 3 and is grounded the capacitor type insulating sleeve 5 of flange 4, and capacitor type insulating sleeve 5 is closely crimped with stress set 2,
It is embedded in the high pressure equipotential screen 6 and cable that stress 2 top surfaces of set are extended to by upper flange 3 of 5 inner surface of capacitor type insulating sleeve
It is zero that conductive core 7, which forms compartments 8, the storehouse electric field intensity inside highs such as a high pressure, the insulation of capacitive insulating sleeve in addition to high pressure equipotential screen 6
One group of capacitance plate 9 insulated from each other being also embedded in layer, outermost earthing 10 are grounded flange 4 with lower flange and are connected, edge
The outer surface of insulating sleeve 5 and along insulating sleeve 5 and the contact surface of stress set 2, the upper and lower edge of capacitance plate 9 to
It shrinks back in staged lower flange side.
When the capacitance type cable terminal of the present embodiment makes, will have upper flange (for example, aluminium alloy) and ground connection flange (example
Such as, aluminium alloy) capacitor type insulating sleeve (for example, being wrapped by epoxy fibreglass) and stress set (for example, silicon rubber making) group
Dress together, capacitor type insulating sleeve should be crimped closely with stress set, be embedded in capacitor type insulating sleeve interior surface by upper flange
The high pressure equipotential screen (for example, being laid in a insulating layer with metal foil or semi-conductive tape) for extending to stress set top surface leads core with cable
The compartments such as a high pressure (being substantially an air chamber) are formed, one group be also embedded in the insulating layer of capacitor type insulating sleeve is insulated from each other
Capacitance plate (for example, being laid with metal foil or semi-conductive tape), the top edge and lower edge of these capacitance plates are respectively along capacitance
It the outer surface of type insulating sleeve and shrinks back along capacitor type insulating sleeve with the contact that stress covers towards ground side in staged.It arrives
Behind scene, one section of cable (coordinating with capacitance type cable terminal head length) should be peeled off cable sheath, remove the semiconductive of cable
This capacitance type cable terminal for being not filled with dielectric, is then sleeved on the electricity for peeling crust off by layer, and end crimping conducting rod
On cable, then by flange fixation architecturally.
Since each point current potential is different in insulating sleeve, and when insulating sleeve and cable assemble, unavoidably has between air
Gap, so existing product must fill dielectric to improve dielectric strength and reduce partial discharge quantity.It is situated between to exempt to fill insulation
Matter, this patent are arranged on insulating sleeve inner wall (or being embedded in close in the insulation of inner wall) at upper flange (conducting end) and extend to
Stress, which covers, forms the compartments such as a high pressure between a metal equipotential screen of top surface or semiconductive equipotential screen, with cable core (conductor),
Each point current potential is identical in this cavity, but electric field strength is zero, therefore is not required to filling dielectric, between insulating sleeve and cable
Gap occur will not cause to discharge.Although the equipotential screen of this extension is shorted out most of insulation of insulating sleeve inner surface, but
Remaining a part of surface insulation and stress set are fitted close the voltage that can still undertake between conductor and grounding body.This extension
The compartments such as the high pressure formed between equipotential screen and conductor are that the major technique of this patent is crucial.
The end of insulating sleeve has upper flange to be connected with leading core and terminal, and the root of insulating sleeve has lower flange to be connect with cable
Stratum and stress set grounded part connection, the inner surface of insulating sleeve lower part are closely crimped with stress set side.Except above-mentioned exhausted
The inner surface of edge sleeve is outer closest to the equipotential screen of extension is set in the insulation of inner surface to be connected with conductor, also in insulating sleeve
The earthing that is linked with lower flange of outermost layer setting, and several are set each other in the insulating layer between equipotential screen and earthing
The capacitance plate of insulation.The upper and lower edge of this group of capacitance plate is respectively along the outer surface of insulating sleeve and insulating sleeve and stress set
Contact shrink back towards ground side in staged.The purpose of this group of capacitance plate is, insulation is controlled using the principle of capacitance partial pressure
The outer surface voltage of sleeve, makes Potential distribution uniform, creeping discharge voltage is improved, so as to improve pollution flashover voltage.Control should simultaneously
Power covers the voltage's distribiuting with the close contact face of insulating sleeve, prevents from covering contact surface flashover along insulating sleeve and stress.This group
The capacitance plate being arranged in insulating sleeve is another key technology of this patent.
Embodiment two
Referring to Fig. 2, the bushing shell for transformer for being not filled with dielectric of the invention, including conducting rod 1 ', stress set 2 ', both ends
Insulating sleeve 5 ' equipped with upper flange 3 ' and ground connection flange 4 '；Conducting rod insulating layer 7 ', insulating sleeve are coated on conducting rod 1
5 play insulation protection around conducting rod 1 and conducting rod insulating layer 7 ', and envelope is formed between insulating sleeve 5 ' and conducting rod 1 '
The insulating space closed；Upper flange 3 ' is fixed by 5 ' one end of insulating sleeve and conducting rod 1 ', and it is right that stress set 2 ' is set in conducting rod 1 '
That answers is equipped with the other end at ground connection flange position, and ground connection flange 4 ' and the stress of the 5 ' other end of insulating sleeve cover 2 ' grounded parts and connects
It connects, insulating sleeve 5 ' contains stress set 2 ' and mutually close crimping, and not filling out for closing is formed between upper flange 3 and stress set 2
Fill the space of dielectric；High pressure equipotential screen 6 ' is inlaid on the inner surface of insulating sleeve 5 ', conducting rod 1 ' passes through upper flange
3 ' are electrically connected with high pressure equipotential screen 6 ', and high pressure equipotential screen 6 ' covers 2 ' by upper flange 3 ' along the stress that axially extends to of conducting rod 1 '
Top surface forms the compartments 8 ' such as pressure；Insulating sleeve 5 ' may be employed capacitor type insulating sleeve, in the insulating layer of capacitor type insulating sleeve
Also embedded with multiple capacitance plates 9 ' insulated from each other, outermost capacitance plate is connected as earthing 10 ' with ground connection flange 4 ', multiple
The axial dimension of capacitance plate 9 ' successively shortens from inside to outside, and side is shunk back in staged.The present embodiment employs stress and covers 2 Hes simultaneously
Two kinds of electric field pressure-equalizing devices of capacitor type insulating sleeve are to realize best voltage equalizing, actually using only stress set 2 and non-electrical
The insulating sleeve of appearance type or using only capacitor type insulating sleeve capacitance cone pressed it is also possible, certainly using other
Pressure-equalizing device is also possible.It, can not on conducting rod 1 ' when the capacitance cone using only capacitor type insulating sleeve is pressed
Coated with conductive bar insulating layer 7 '.The present embodiment is the height of connection external conductor and the bushing shell for transformer of transformer, the certainly present invention
Pressure insulation system can be used for all kinds of bushings such as bushing shell for transformer, wall bushing, GIS casings.
When making, by the insulating sleeve 5 equipped with upper flange 3 and ground connection flange 4 and conducting rod insulating layer 7 ' is coated with
Conducting rod 1 ', stress set 2 ' are assembled together, and insulating sleeve 5 ' should be crimped closely with stress set 2 '.Upper flange 3 ' and ground connection flange 4 '
Aluminium alloy may be employed to be made, grading ring realization may be employed in upper flange 3 ', and stress set 2 ' may be employed silicon rubber and be made.It is described
Insulating sleeve 5 be made of fiber glass epoxy or other heat cured insulation materials, shape is cone or cylindrical shape；Insulation
Capacitor type insulating sleeve may be employed in sleeve 5.The conducting rod insulating layer 7 ' is used for the diametral voltage that insulate, known to its use
Technique is coated on conducting rod 1.Conducting rod 1 can be conductive rod or tubular shape conductor.
In order to ensure still ensuring that dielectric strength after dielectric is not filled with and partial discharge quantity being made to be reduced to standard, this
It is that the compartments 8 ' such as the high pressure of closing are formed in the cavity for being not filled with dielectric to invent the important measures taken, the sky
The current potential of each point of intracavitary is identical and electric field strength is zero, and the scope of the compartments 8 ' such as described high pressure axially length L
Conducting rod 1 ' described in interior encirclement.The cavity of the compartments 8 ' such as the high pressure is tube-shaped structure, and the structure is by conducting rod 1 '
Conducting rod insulating layer 7 ', high pressure equipotential screen 6 ', upper flange 3 ' and stress set 2 ' on top surface surround.It should be appreciated that it arrives：It is high
The compartments such as pressure have axial length L, since the current potential of each point in the compartments such as high pressure 8 is identical and electric field strength is zero, it is high
The compartments 8 such as pressure play the role of uniformly axially along face voltage, to eliminate the sudden strain of a muscle axially along face voltage caused by uneven
Network etc. destroys dielectric strength and increases the harm of partial discharge quantity；The axial length L and the axial height H of insulating sleeve it
Than bigger, then the ability that insulating sleeve is undertaken axially along face voltage is stronger；If on the contrary, the axial length L and insulation sleeve
The ratio between the axial height H of cylinder very little, such as sets small-sized cavity, then the objective effect of these areolas in insulating sleeve
Fruit, which differs, surely to play the role of uniformly axially along face voltage；On the other hand, theoretically, axial length L and axial height H
The ratio between maximum can reach 1, but 1 can not possibly be reached in some embodiments, embodiment as depicted in figs. 1 and 2, due to its capacitance
It also needs to inlay capacitance plate in the insulating sleeve of type, and capacitance plate needs to increase the axis for the insulating sleeve that cannot be used for the compartments such as high pressure
To height H.Therefore, a kind of preferred scheme is the axial length L of the compartments such as described high pressure and the axial height of insulating sleeve
The ratio between H is more than 0.2 and less than or equal to 1.
In order to which the current potential for each point being better achieved in the compartments such as high pressure is identical and electric field strength is zero, to ensure uniform axis
To the effect along face voltage, the high pressure equipotential screen is electrically connected by upper flange with conductor.Fig. 1 and embodiment shown in Fig. 2,
Since upper flange 3 uses the aluminium alloy with good electric conductivity to be made, the conducting rod 1 passes through upper flange 3 and high pressure equipotential
Screen 6 electrical connection, it is clear that this structure is not only simple, and can ensure that between conducting rod 1 and high pressure equipotential screen 6 be electrically connected it is strong
Degree and reliability.Of course it is not excluded other structures mode, as upper flange 3 cannot be with using non-conducting material or upper flange 3
Conducting rod 1 and/or high pressure equipotential screen 6 closely crimp, and in these cases, the conducting rod 1 can pass through conducting wire and high pressure etc.
6 electrical connection of position screen.
Referring to the embodiment of Fig. 2 bushings shell for transformer provided, including two high voltage insulation structures being set in outside conducting rod,
Two high voltage insulation structures are equipped with the compartments 8 ' such as high pressure, pass through respective 4 ' the axial fixation that is coaxial docking of ground connection flange.The transformation
The ground connection flange 4 ' of device casing, insulating sleeve 5 ', the stress set compartments 8 ' such as 2 ' and high pressure are respectively two sets.The high-voltage isulation on top
Structure forms a high pressure by upper flange 3 ', the high pressure equipotential screen 6 ' of insulating sleeve 5 ', stress set 2 ' and conducting rod insulating layer 7 '
Etc. compartments 8 ', the insulating sleeve 5 ' on top be externally provided with full skirt.The high voltage insulation structure of lower part is by high pressure of insulating sleeve 5 ' etc.
Position screen 6 ', stress, which cover, forms the compartments 8 ' such as a high pressure between 2 ', conducting rod insulating layer 7 ' and the connector being connected with transformer.
The advantageous effect of the Insulation Scheme of this segmented can make easy to produce and each section of casing that can meet different use rings respectively
Border or the requirement of use condition, for example, that section below bushing shell for transformer can be used for extending into transformer and (not show in figure
Go out) in transformer oil in, and that section of top can expose in air, can be equipped with silicon outside the insulating sleeve of section on the top
Full skirt made of rubber.
Following inspiration, the high-voltage isulation knot for being not filled with dielectric of the invention can be obtained from embodiment shown in Fig. 2
Structure can also use the segmented scheme of more set insulation system docking according to purposes.It is of the invention to be not filled with dielectric
Become attached to structure can also be applied to isolated bus on.Isolated bus is used to connect each current-carrying duplexure in power distribution equipment
Together, play an important role of to collect and distribute electric power, can such as be connected between generator and transformer, be connected to transformer with
Between high-tension switch cabinet.Isolated bus is substantially exactly to connect a section insulated wire section by connector, every section of insulation
Line segment generally includes conductor and the insulation system being coated on outside conductor, and insulation system is preferably using condenser type insulation system, conductor
Can be tubular shape conductor or conductive rod.Actually each section of isolated bus line segment is exactly a casing, therefore each
High voltage insulation structure is set on the conductor of section isolated bus line segment, the compartments such as high pressure are formed between insulation system and conductor, it can
To reduce the usage amount of insulating materials, cost is substantially reduced.
Embodiment three
Specifically as shown in figure 3, a kind of isolated bus of the embodiment of the present invention three, the 1 " peripheral hardware of tubular shape conductor of isolated bus
There is insulating sleeve 5 ", the insulating space of closing is formed between tubular shape conductor 1 " and insulating sleeve 5 ", in 5 " inner surface of insulating sleeve
On be inlaid with high pressure equipotential screen 6 ", tubular shape conductor 1 " is electrically connected with high pressure equipotential screen 6 ", in high pressure equipotential screen 6 " and insulating layer 7 "
Between formed and need not fill the compartments 8 " such as the high pressure of dielectric, also embedded with multiple insulated from each other in the insulating layer of insulating sleeve 5 "
Capacitance plate 9 ", outermost capacitance plate is connected as earthing 10 " with ground terminal 4 ', the axial dimension of multiple capacitance plates 9 '
Successively shorten from inside to outside, side is shunk back in staged.The isolated bus of this implementation only with capacitor type insulating sleeve capacitance cone
Pressed；Stress set can also be set in insulating space in addition, it at this time need to be in 1 " outsourcing insulating layer coating of tubular shape conductor, high pressure
Equipotential screen 6 forms the compartments such as high pressure by the top surface that the stress for axially extending to the conductor other end of one end along conductor covers.Insulation sleeve
Cylinder 5 " can be connected with tubular shape conductor 1 " by solid insulating material 3 ", can also can also use insulation by flanged joint
The dedicated connector connection (can be also used for being connected with another section of busbar) of busbar or other connection structures are only needed for fixation and lead
Body and insulation system, and electric connecting conductor and high pressure equipotential screen.
In conclusion the present invention is improved as a result of the structure of the compartments such as high pressure 8 and a series of corresponding structures,
Not only solve the problem of high pressure arrangements of electric connection need not fill dielectric and resulting mitigation product weight, drop
The advantageous effect of low manufacture cost, moreover, also solve ensures that dielectric strength, part are put on the premise of dielectric is not filled with
The reliability of electricity index and performance, and can also effectively reduce the manufacture difficulty of product and the system as caused by manufacture difficulty
This is caused, and can also effectively improve production efficiency.Compared with prior art, the present invention also has the advantages that in further detail below：
1. insulating sleeve is in conducting rod fit-up gap in the compartments such as high pressure, it is not necessary to be filled dielectric, will not more be made
Into leakage, not only energy-saving and environmental protection, and also it is safe and reliable.
2. in-site installation construction is very convenient, efficient, by taking cable termination as an example, the cable insulation table at the compartments such as high pressure position
Face need not polish smooth, and save many times.
3. due to the presence of multiple capacitance plates, stress set and capacitor type insulating barrel contacts face and outer surface are controlled
Electric potential gradient makes the electric potential gradient of inside and outside insulation all than more uniform, not only increases the electric strength of insulating sleeve, more improve
Creeping discharge voltage, so as to improve pollution flashover voltage, also extends the service life of insulating sleeve.
4. according to actual field condition, can suitably adjust capacitor type insulating casing equipotential screen length or
Core is led using one section of conductor jumper, so as to solve the problems, such as that cable falls short of and the actual installations such as installation space is limited.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
On the premise of not departing from present inventive concept, several simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (2)
1. a kind of bushing shell for transformer, it is characterised in that：Including two high voltage insulation structures being set in outside conducting rod, two high pressures
Insulation system is equipped with the compartments such as high pressure, is axially coaxial docking fixation by respective ground connection flange；
Each high voltage insulation structure includes insulating sleeve and stress set, insulating sleeve are set in outside conducting rod, in insulating sleeve
The insulating space of closing is formed between conducting rod, high pressure equipotential screen, conducting rod and height are inlaid on insulating sleeve inner surface
The electrical connection of equipotential screen is pressed, the compartments such as the high pressure of dielectric need not be filled by being formed between high pressure equipotential screen and conducting rod, conductive
Bar is coated with insulating layer of conductor, and stress set is sleeved on the one end for being located at insulating space on conducting rod, and insulating sleeve inner surface is with answering
The close crimping of power set, the ground connection flange of insulating sleeve one end are connected with stress set grounded part, and the high pressure equipotential screen is by insulating
The space other end extends to stress set top surface；
And the insulating sleeve of high voltage insulation structure is capacitor type insulating sleeve, also embedding in the insulating layer of capacitor type insulating sleeve
There are multiple capacitance plates insulated from each other, wherein outermost capacitance plate is earthy earthing, earthing and high-voltage isulation knot
The ground connection flanged joint of structure, the high pressure equipotential screen is between multiple capacitance plates and conducting rod.
2. bushing shell for transformer according to claim 1, it is characterised in that：A height in described two high voltage insulation structures
Insulation system is pressed by upper flange, the high pressure equipotential screen of the insulating sleeve of the high voltage insulation structure, stress set and insulating layer of conductor shape
Into compartments such as high pressures, another high voltage insulation structure by the high voltage insulation structure insulating sleeve high pressure equipotential screen, should
The compartments such as a high pressure are formed between power set, insulating layer of conductor and the connector that is connected with transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510512180.6A CN106469594B (en) | 2015-08-19 | 2015-08-19 | Bushing shell for transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510512180.6A CN106469594B (en) | 2015-08-19 | 2015-08-19 | Bushing shell for transformer |
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| Publication Number | Publication Date |
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| CN106469594A CN106469594A (en) | 2017-03-01 |
| CN106469594B true CN106469594B (en) | 2018-05-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634496A (en) * | 2017-08-01 | 2018-01-26 | 全球能源互联网研究院 | A kind of high voltage direct current cable line terminal |
| CN110571000A (en) * | 2018-06-05 | 2019-12-13 | 沈阳和新套管有限公司 | Manufacturing method of anti-cracking dry-type capacitive sleeve conductive tube |
| CN108630361B (en) * | 2018-08-02 | 2024-07-26 | 江苏神马电力股份有限公司 | Insulating sleeve |
| CN108962565A (en) * | 2018-08-28 | 2018-12-07 | 山东电力设备有限公司 | A kind of bushing shell for transformer with multi-screen structure |
| CN112018652B (en) * | 2020-08-26 | 2022-06-14 | 西安神电(泾阳)电器有限公司 | Environment-friendly inflatable switch cabinet |
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| Publication number | Publication date |
|---|---|
| CN106469594A (en) | 2017-03-01 |
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