Bushing core body drying device
Technical field
It the utility model is related to capacitance of bushing fuse technical field of drying, and in particular to a kind of bushing core body dries dress
Put.
Background technology
Bushing is middle/high-voltage electrical appliance device, generator, transformer, reactor, breaker and other electrical installations
Core component, the core body of high pressure Oil-impregnated Paper Condenser Bushing in History include metallic core and the capacitance core being coated on the outside of metallic core
Son, metallic core are generally aluminum pipe, and capacitor core is then the fine and close insulator formed by multilayer insulation paper roll system, ply of paper water content
Height directly determine the core parameter of bushing quality, determine the dielectric loss level of sleeve pipe longtime running with effectively making
Use the life-span.
Drying mode traditional at present typically uses radiant heating or medium conduction heating, and cable paper is from outside to inside or by interior
To successively being heated outside, but the poor thermal conductivity of cable paper, firing rate is slow, drying time length, and dry mass is poor.In such as
State patent document CN104795254A discloses a kind of ultrahigh voltage oil paper capacitive capacitance of bushing fuse drying means, first will insulation
Paper body paper, which is bundled in drying room, to be dried, and sets baking lamp to continue drying out on paper feed path in coiling process, after the completion of rolling again
Voltage transformation vacuum dry technique is taken to remove the moisture that insulating paper dried in coiling process absorbs again, the prior art is done
Dry process is complicated, and arid cycle, length, was continued drying out in coiling process to every layer of insulating paper, but the absorption speed of insulating paper
Moisture that is very fast, being very easy in absorption air, can not avoid insulating paper non-hygroscopic in coiling process, therefore, roll
Still need to be dried in vacuo bushing after, i.e., the vacuum tank for being placed with bushing is heated, but insulate
The thermal conductivity of paper is very poor, and the insulating paper rolled layer by layer from outside to inside, successively heats, and heat time length, drying efficiency is low, and with
The further reduction of water content, water removal can become to be increasingly difficult to, and required time is longer, and the excessive temperature differentials of external and internal layer paper,
Heating institute is carried out to whole vacuum tank when can also cause the high insulating paper layer aging of temperature, or even rupture, and be dried in vacuo
High energy consumption is needed, cost is high, causes the wasting of resources.
In addition, in the method for the nonmetallic materials such as drying wool, rubber, timber, plastics, in addition to high-frequency drying,
High-frequency drying has rate of drying fast, and the advantages of being heated evenly, still, the capacitor core of bushing is gone back in addition to insulating paper
Including aluminium foil, multilayer aluminum layers of foil is folded in multilayer insulation ply of paper, due to aluminium foil layer presence and think that aluminium foil can produce screen
It is deep-rooted to cover the thought of effect, those skilled in the art are not taken into account that using dielectric drying when drying bushing core body
Method.
Utility model content
Therefore, the technical problems to be solved in the utility model is to overcome bushing capacitor core drying in the prior art
Cycle is long, drying effect is poor, the defects of influenceing bushing quality, and a kind of arid cycle is short, drying effect is good so as to providing, into
The higher bushing core body drying device of quality.
The technical solution adopted in the utility model is as follows:
A kind of bushing core body drying device, including:Vacuum tank, there is opening and be closed in the lid of the opening
Body;Radio-frequency generator, there is positive pole and negative pole, for providing the high-frequency heating electromagnetic field of setpoint frequency;Also include being suitable to be located at
In metal apparatus for placing in the vacuum tank, including at least one metal for placing bushing core body to be dried
Any one in both metallic cores of void column body, the metal hollow cylinder and the bushing core body connects with the positive pole
Connect, corresponding, another in both is connected with the negative pole, and between the metallic core and the metal hollow cylinder
Insulation set.
The bushing core body is corresponded with the metal hollow cylinder and set, and each metal hollow cylinder has
First connection end of corresponding electrode connection.
The second connection end of corresponding electrode connection is provided with the metallic core of the bushing core body.
The metallic core is provided at both ends with mounting cap, and the second connection end is disposed therein a mounting cap
On.
First connection end electrically connects with the negative pole, and the second connection end electrically connects with the positive pole, and described
First connection end ground connection of negative pole electrical connection is set.
The metal apparatus for placing also includes mounting bracket, and there are the mounting bracket several to be used to plug the metal hollow
The installing port of cylinder, each installing port are adapted for insertion into a metal hollow cylinder.
For the opening in the side wall of the vacuum tank, the bottom in the vacuum tank is provided with the first guide rail knot
Structure, length direction of first guide rail structure along the vacuum tank extend to the opening, and the mounting bracket is adapted to slide into
First guide rail structure is simultaneously slidably matched with it.
Also include transporting car, the car that transports is used to place the mounting bracket and the mounting bracket is transported into the opening
Place.
The car that transports is used to place to be provided with the second guide rail structure on the loading end of the mounting bracket, the mounting bracket
Bottom is removably connected with base, and the base is suitable to slide along second guide rail structure, and the car that transports is being moved to
Second guide rail structure described in when stating opening is suitable to dock with first guide rail structure.
Also include controller, and the infrared thermal detector being connected on the vacuum tank, with the controller, use
In the temperature for detecting the bushing core body in real time.
Also include the cooling device being connected with the controller, including low-temperature receiver and at least one low-temperature receiver input pipe, each
One end of the low-temperature receiver input pipe connects the low-temperature receiver, and the other end stretches into one metallic core of insertion in the vacuum tank
It is interior.
The operating frequency range of the radio-frequency generator is 4-12MHz.
Technical solutions of the utility model, have the following advantages that:
1. bushing core body drying device provided by the utility model, including vacuum tank, to be carried inside vacuum tank
Dress is held for the radio-frequency generator of high-frequency heating electromagnetic field, and suitable for the metal apparatus for placing in vacuum tank, metal
Put including at least one metal hollow cylinder, its cavity is interior to be suitable to place bushing core body to be dried, metallic core and gold
Insulated between category hollow cylinder, and any one in the metallic core of metal hollow cylinder and bushing and radio-frequency generator
Positive pole connects, and another is connected with the negative pole of radio-frequency generator, due to the bushing core body that existing rolling technology rolls,
One layer or several layers of insulating papers are often rolled, one section of aluminium foil is just added in insulating paper, aluminium foil rolls together with insulating paper, adjacent
At least one layer of insulating paper layer is folded between aluminium foil layer, and every layer of aluminium foil can not form closed loop completely, but connection is overlapped,
The seam crossing of overlap joint causes seam and imprecision, electromagnetism can pass through seam, in a metal void column due to being folded with insulating paper layer
Electromagnetic field is formed between body and metallic core, each layer insulating paper is uniformly heated simultaneously, the efficiency of heating surface significantly improves, greatly
Shorten arid cycle greatly;And Electromagnetic Heating heating is rapid, in the absence of the delay effect of indirectly heat, heating and temperature control
It is more precisely reliable, for diameter 114mm medium and small molded cannula, it is generally up to arid cycle 10-15 days, finished product rate
It is low, the technical program arid cycle is used as 2-3 days, and core diameter is bigger, the insulating paper layer number of plies rolled is more, using this
The advantage of scheme will be more obvious, and water content is 8-12% bushing core body before drying, and dried water content is less than
0.5%, it can almost reach over dry, dried product dielectric loss value also further reduces, and uses this drying means can be with
Simplify technique, omit before insulating paper rolls and the drying in rolling, it is less demanding to rolling mode;High, the cycle in the efficiency of heating surface
Short, while product water content is low, compared with traditional vacuum drying, high-frequency heating is dropped without being heated to vacuum tank
Low cost, save the energy.
2. bushing core body drying device provided by the utility model, metal hollow cylinder and bushing core body are one by one
It is correspondingly arranged, the magnetic field formed between the metal core pipe of metal hollow cylinder and bushing core body is more concentrated, the efficiency of heating surface
It is higher.
3. bushing core body drying device provided by the utility model, metal hollow cylinder has and radio-frequency generator
First connection end of electrode connection, the both ends of the metallic core of bushing core body are threaded with mounting cap, one of peace
Dress cap is provided with the second connection end being connected with another electrode of radio-frequency generator, in a metal between void column body and metallic core
Heating electromagnetic field is formed, directly insulating paper layer is heated;, can be by every bushing when drying a collection of bushing core body
The both ends connection mounting cap of core body, is placed in metal hollow cylinder and carries out dielectric drying.
4. bushing core body drying device provided by the utility model, metal apparatus for placing also includes mounting bracket, described
Mounting bracket has several installing ports for being used to plug the metal hollow cylinder, and each installing port is adapted for insertion into an institute
Metal hollow cylinder is stated, the setting of mounting bracket enables bushing core body to dry in batches, easy to operate efficient.
5. bushing core body drying device provided by the utility model, the bottom in vacuum tank is provided with the first guide rail
Structure, length direction of first guide rail structure along vacuum tank extend to opening, and the bottom of mounting bracket has and the first guide rail knot
The sliding block or roller that structure is slidably matched, when mounting bracket is pushed into the opening of vacuum tank, you can slide and match somebody with somebody with the first guide rail structure
Close, be directly pushed into vacuum tank, also, traditional bushing core body dries factory building to dry high pressure within a certain period of time
Sleeve pipe quantity is maximized, and vacuum tank is placed vertically, so as to house more vacuum in the factory building of same homalographic
Tank body, also need to be equipped with special hanging apparatus by bushing lifting or under be put into vacuum tank, using dielectric drying, due to
Arid cycle greatly shortens, can be horizontal positioned by vacuum tank, will not also reduce yield, will directly can be pacified using guide rail structure
Shelve in push-in vacuum tank, it is more convenient and safe.
6. bushing core body drying device provided by the utility model, in addition to car is transported, including be provided with second and lead
The loading end of rail structure, mounting bracket can reciprocatingly slide along the second guide rail structure, be run when transporting car to the opening of vacuum tank
Place, the first guide rail structure connect with the second guide rail structure, directly mounting bracket can be pushed into vacuum tank, without that will transport car
Vacuum tank is pushed into, car is transported and continues to transport next mounting bracket.
7. bushing core body drying device provided by the utility model, vacuum tank is red provided with being connected with controller
Outer thermal detector, the temperature of bushing core body being detected in real time, avoids temperature too low or too high, influence product dries effect
Fruit.
8. bushing core body drying device provided by the utility model, in addition to the cooling device being connected with controller,
Including low-temperature receiver and at least one low-temperature receiver input pipe, one end connection low-temperature receiver of each low-temperature receiver input pipe, the other end stretches into vacuum tank
Internal portion is simultaneously inserted into a metallic core, because the magnetic field intensity close to metallic core is higher, easily causes insulating paper layer
Internal layer heating faster, therefore low-temperature receiver is passed through in metallic core, local cooling can be carried out to bushing core body.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is that the partial structurtes of the bushing capacitor core drying device provided in embodiment one of the present utility model are shown
It is intended to;
Fig. 2 is the structural representation that the metallic core of the metal hollow cylinder and bushing core body shown in Fig. 1 coordinates.
Description of reference numerals:
1- vacuum tanks;11- is open;The guide rail structures of 12- first;
2- metal hollow cylinders;The connection ends of 21- first;
3- bushing core bodys;31- metallic cores;32- insulating paper layers;33- second connection ends;34-
Mounting cap;
4- mounting brackets;41- installing ports;42- bases;
5- transports car;The guide rail structures of 51- second.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection;Can be mechanical connection or electrical connection;Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Conflict can is not formed to be combined with each other.
Embodiment one
Fig. 1 is that the partial structurtes of the bushing capacitor core drying device provided in embodiment one of the present utility model are shown
It is intended to;Fig. 2 is the structural representation that the metallic core of the metal hollow cylinder and bushing core body shown in Fig. 1 coordinates.Such as Fig. 1
Shown in Fig. 2, the bushing capacitor core drying device of the present embodiment offer, including vacuum tank 1, it is in vacuum tank 1
Portion provides the radio-frequency generator of high-frequency heating electromagnetic field, and is contained suitable for the metal apparatus for placing in vacuum tank 1, metal
Putting device includes mounting bracket 4, and mounting bracket 4 has several installing ports 41, a metal hollow post is inserted in each installing port 41
Body 2, the first connection end 21 electrically connected with the negative pole of radio-frequency generator, and first are provided with the outer wall of metal hollow cylinder 2
The ground connection of connection end 21 is set, one bushing core body 3 to be dried of insertion, bushing core in each metal hollow cylinder 2
The both ends of the metallic core 31 of body 3 are respectively connected with a mounting cap 34 by helicitic texture, are set on one of mounting cap 34
There is the second connection end 33 electrically connected with the positive pole of radio-frequency generator, because the capacitor core of bushing is multilayer insulation ply of paper
32, mutually insulated between metal hollow cylinder 2 and the metallic core 31 of bushing core body 3 can be made.
The working frequency of radio-frequency generator is 4-12MHz, and in this frequency range, insulating paper layer 32 can be heated
Dry, due to the bushing core body 3 that existing rolling technology rolls into, the bushing rolled due to existing rolling technology
Core body 3, one layer or several layers of insulating papers often being rolled, one section of aluminium foil is just added in insulating paper, aluminium foil rolls together with insulating paper,
At least one layer of insulating paper layer 32 is folded between adjacent aluminium foil layer, and every layer of aluminium foil can not form closed loop completely, but
Overlap joint connection, the seam crossing of overlap joint is due to being folded with insulating paper layer 32, and causing seam, simultaneously imprecision, electromagnetism can pass through seam,
The magnetic field more concentrated is formed between void column body 2 and the metallic core 31 of bushing core body 3 in a metal, to each layer insulating paper
Layer 32 simultaneously uniformly, concentrate carry out heat, the efficiency of heating surface significantly improves, and substantially reduces arid cycle;And Electromagnetic Heating
Heating is rapid, and in the absence of the delay effect of indirectly heat, heating and temperature control is also more precisely reliable, and dried product is almost
Over dry can be reached, dried product dielectric loss value also further reduces, and can also simplify technique using this drying means, saves
Drying before slightly insulating paper rolls and in rolling, it is less demanding to rolling mode;High in the efficiency of heating surface, the cycle is short, and product is aqueous
While measuring low, compared with traditional vacuum drying, high-frequency heating reduces cost, saved without being heated to vacuum tank 1
The energy.
The metal hollow cylinder 2 is stainless steel tube.
The metallic core 31 of the bushing is aluminum pipe.
The bottom of mounting bracket 4 is removably connected with base 42, is provided with roller on base 42, the bottom in vacuum tank 1
The first guide rail structure 12 is provided with, length direction of first guide rail structure 12 along vacuum tank 1 extends to opening 11, work as mounting bracket
4 are pushed at the opening 11 of vacuum tank 1, you can are slidably matched with the first guide rail structure 12, are directly pushed into vacuum tank 1.
Also include transporting car 5, including be provided with the loading end of the second guide rail structure 51, mounting bracket 4 can pass through its base
Roller on 42 reciprocatingly slides along the second guide rail structure 51, is run when transporting car 5 to the opening 11 of vacuum tank 1, first leads
Rail structure 12 is docked with the second guide rail structure 51, and directly mounting bracket 4 can be pushed into vacuum tank 1, is pushed away without that will transport car 5
Enter vacuum tank 1, transport car 5 and continue to transport next mounting bracket 4.
Also include being layed in the 3rd guide rail structure outside vacuum tank 1, transporting car 5 can move along the 3rd guide rail structure
To the opening 11 of vacuum tank 1, mounting bracket 4 is promoted to slip into vacuum tank along the second guide rail structure 51 and the second guide rail structure 51
In 1, transport car 5 and remove, continue to transport next mounting bracket 4, production efficiency is high, and continuity is strong.
The outside of vacuum tank 1 is provided with infrared thermal detector, can detect each several part temperature of bushing core body 3 in real time,
Because the magnetic field intensity close to metallic core 31 is higher, easily causes the internal layer of insulating paper layer 32 to heat up faster, be additionally provided with cold
But device, including low-temperature receiver and the low-temperature receiver input pipe that setting is corresponded with bushing core body 3, the one of each low-temperature receiver input pipe
End connection low-temperature receiver, the other end stretch into the inside of vacuum tank 1 and are inserted into a metallic core 31, when detecting metallic core 31
Temperature is too high, and low-temperature receiver is passed through to its inside, can carry out local cooling to bushing core body 3.
Low-temperature receiver is cold air.
Also include controller, controller electrically connects with infrared thermal detector, cooling device respectively, can receive infrared heat and visit
The signal of device is surveyed, control cooling device work, the accurate control to bushing drying temperature is realized, local cooling, dries effect
Fruit is more preferable.
As the alternative embodiments of embodiment one, two bushing core bodys are placed in a metal hollow cylinder.
As the alternative embodiments of embodiment one, the shape of cross section of metal hollow cylinder is not specifically limited, can
Think arbitrary shape, it is along the axially extending formation hollow cylinder of bus.
As the alternative embodiments of embodiment one, low-temperature receiver is air at room temperature.
As the alternative embodiments of embodiment one, the first connection end of metal hollow cylinder and radio-frequency generator are just
Pole electrically connects, and the second connection end of metallic core electrically connects with the negative pole of radio-frequency generator, and second connection end ground connection is set.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among the protection domain that variation is created still in the utility model.