CN206076004U - A kind of transformer oil tank magnetic shield structure - Google Patents
A kind of transformer oil tank magnetic shield structure Download PDFInfo
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- CN206076004U CN206076004U CN201621027100.4U CN201621027100U CN206076004U CN 206076004 U CN206076004 U CN 206076004U CN 201621027100 U CN201621027100 U CN 201621027100U CN 206076004 U CN206076004 U CN 206076004U
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Abstract
This utility model provides a kind of transformer oil tank magnetic shield structure, is related to field transformer.The transformer oil tank magnetic shield structure, including casing and base, base is located at the bottom of casing, the inwall of casing is symmetrically arranged with connecting rod, connecting rod sequentially passes through cut-off waveguide ventilating board away from one end of cabinet wall and shielding piece is fixedly connected with fixed plate, and cut-off waveguide ventilating board is fitted with the inwall of casing, cut-off waveguide ventilating board is provided with two bakelite bolts away from the side of casing, and two bakelite bolts are positioned at the top and bottom of connecting rod, the end of thread of bakelite bolt sequentially passes through cut-off waveguide ventilating board and casing and extends to the outside of casing, extend to the bakelite nut thread that one end of the bakelite bolt outside casing arranged with box outer surface to be connected.The transformer oil tank magnetic shield structure, shield effectiveness are good, and ventilation effect is good, reduce transformator and cause vortex and magnetic hystersis loss in use to fuel tank, improve the service life of fuel tank.
Description
Technical field
This utility model is related to transformer technology field, specially a kind of transformer oil tank magnetic shield structure.
Background technology
Transformator is that main member is coil and iron core changing the device of alternating voltage using the principle of electromagnetic induction.
In electric equipment and radio-circuit, buck/boost, matching impedance, security isolation etc. are commonly used for.
During transformer station high-voltage side bus, winding will produce magnetic field after electric current, as the transformer core in winding is good magnetic conductance
Body, so as to cause transformer loss, needs to use magnet shielding structure, and such as Chinese patent discloses a kind of " large-scale power transformation
Device fuel tank the magnet shielding structure " (patent No.：201320861738.8) patent include fixed plate, magnetic shield bar, connecting plate, damping
Rubber cushion and transformer box wall, the magnetic shield bar are formed by stacking by some stalloys, are formed around fixed plate, several magnetic cups
Cover bar along its length both sides fixed plate by connecting plate connect, connecting plate is provided with installing hole, and is bolted on
On transformer box wall, between magnetic shield bar and transformer box wall, damping rubber pad is provided with.The patent structure is simple, removes and installs maintenance
It is convenient, it is not necessary to Special clamping drying plant, the vortex and magnetic hystersis loss of fuel tank and magnetic shield itself can be effectively reduced.But this is special
Profit can only carry out magnetic shield to a face in fuel tank, and shield effectiveness is bad, and fuel tank vent effect difference is so as to increased fuel tank
Temperature, it is short to the service life of fuel tank.
Utility model content
(1) technical problem for solving
For the deficiencies in the prior art, this utility model provides a kind of transformer oil tank magnetic shield structure, solves change
Depressor causes the problem of vortex and magnetic hystersis loss in use to fuel tank.
(2) technical scheme
To realize object above, this utility model is achieved by the following technical programs：A kind of oil tank of transformer magnetic cup
Shield structure, including casing and base, the base are located at the bottom of casing, and the inwall of the casing is symmetrically arranged with connecting rod,
The connecting rod sequentially passes through cut-off waveguide ventilating board away from one end of cabinet wall and shielding piece is fixedly connected with fixed plate, and
Cut-off waveguide ventilating board is fitted with the inwall of casing, and the cut-off waveguide ventilating board is provided with two bakelites away from the side of casing
Bolt, and two bakelite bolts, positioned at the top and bottom of connecting rod, the end of thread of the bakelite bolt sequentially passes through cut-off wave
Turn on aerofoil and casing and extend to the outside of casing, the one end for extending to the bakelite bolt outside casing is set with box outer surface
The bakelite nut thread connection put, the connecting rod are provided with electromagnetic sealing liner, the shielding piece with the junction of shielding piece
Bottom be fixedly connected with the first ground strip, first ground strip runs through casing and extends to base away from one end of shielding piece
Inside be fixedly connected with earth plate, the earth plate be located at base inner wall bottom, the fixed plate near connecting rod
Side is provided with two fixed pin shafts, and two fixed pin shafts are respectively positioned at the top and bottom of connecting rod, the fixed plate away from
The side of connecting rod is fixedly connected with guide card by fixed pin shaft, and the bottom of the guide card is fixedly connected with the second ground strip, institute
The inside that the one end of the second ground strip away from guide card is stated through casing and base is extended to is fixedly connected with earth plate, the ground connection
The bottom of plate is provided with grounding head, and the grounding head runs through base away from one end of earth plate and extends to the outside of base, institute
Fixed column is installed with the axis for stating cabinet wall bottom, the fixed column arranges cored away from one end of cabinet wall
And iron core is located between two guide cards, the both sides of the iron core are socketed with coil, are provided with the left of the casing front surface
Oil inlet pipe, is provided with flowline on the right side of surface after the casing.
Preferably, the surface of the cut-off waveguide ventilating board offers vent, and vent in cellular.
Preferably, the shielding piece is internally provided with three fixed supported slabs, between each two fixed supported slab and fixed
The stalloy being superimposed is provided between plate and shielding piece inwall.
Preferably, it is installed with bushing at the top of the casing, the casing is installed with low-tension bushing,
And low-tension bushing is located between bushing.
Preferably, the quantity at least four of the grounding head, and grounding head is in be equally spaced.
(3) beneficial effect
This utility model provides a kind of transformer oil tank magnetic shield structure.The beneficial effect for possessing is：The transformer oil
Case magnet shielding structure, is coordinated by arranging guide card and the second ground strip, makes the magnetic field produced between iron core and coil, can pass through
Guide card and the second ground strip are transferred to earth plate, then magnetic field transmission is reached degaussing to ground by the grounding head of earth plate bottom,
Simultaneously by the cooperation of shielding piece and cut-off waveguide ventilating board, fuel tank is allow to shield to magnetic flux in ventilation, so as to drop
The low temperature of fuel tank, shield effectiveness are good, and ventilation effect is good, reduces the temperature of fuel tank, reduces transformator right in use
Fuel tank causes vortex and magnetic hystersis loss, improves the service life of fuel tank.
Description of the drawings
Fig. 1 is this utility model structural front view；
Fig. 2 is this utility model structure top view；
Fig. 3 is this utility model cut-off waveguide ventilation panel structure schematic diagram；
Fig. 4 is the structural representation that this utility model shields piece.
In figure：1 casing, 2 bases, 3 connecting rods, 4 cut-off waveguide ventilating boards, 5 shielding pieces, 6 fixed plates, 7 bakelite bolts, 8
Bakelite nut, 9 electromagnetic sealing liners, 10 first ground strips, 11 earth plates, 12 fixed pin shafts, 13 guide cards, 14 second ground strips,
15 grounding heads, 16 fixed columns, 17 iron cores, 18 coils, 19 oil inlet pipes, 20 flowlines, 21 vents, 22 fixed supported slabs, 23 silicon steel
Piece, 24 bushings, 25 low-tension bushings.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only this utility model a part of embodiment, rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of this utility model protection.
This utility model embodiment provides a kind of transformer oil tank magnetic shield structure, as Figure 1-4, including 1 He of casing
Base 2, the top of casing 1 be installed with bushing 24, and casing 1 is installed with low-tension bushing 2, and low-tension bushing 25
Between bushing 24, transformer high-voltage bushing 24 and low-tension bushing 25 are the primary insulation devices outside transformer-cabinet 1,
The lead-out wire of transformator high and low pressure winding has to pass through insulated sleeve, make between lead-out wire and lead-out wire and transformer case it
Between insulate, while playing fixed lead-out wire, base 2 is symmetrically arranged with connection positioned at the bottom of casing 1, the inwall of casing 1
Bar 3, connecting rod 3 sequentially passes through cut-off waveguide ventilating board 4 away from one end of 1 inwall of casing and shielding piece 5 is fixed with fixed plate 6 and connected
Connect, prevent some magnetic fluxs to be transmitted on transformer-cabinet 1, in case by the air gap or transformer oil by arranging shielding piece 5
The heating of inductive loop in body 1, reduces transformator caloric value, reduces the loss of transformator, and cut-off waveguide ventilating board 4 and casing
Inwall laminating, according to waveguide theory, there is a cut-off frequency, i.e. cut-off waveguide in waveguide, when signal frequency is higher than cut-off
During frequency, waveguide is to turn on, and electromagnetic wave is cut off or decays and can not transmit, this frequency characteristic phase with high pass filter
Seemingly.The cut-off waveguide ventilating board 4 relative to a certain frequency be can be designed that using this principle so that the frequency of interference signal falls
In the cut-off region of waveguide, such interference signal cannot pass through waveguide, and in other words, waveguide serves the work of electromagnetic shielding
With the surface of cut-off waveguide ventilating board 4 offers vent 21, and vent 21 is in cellular, and vent 21 is arranged in honeycomb
Shape, can ensure that best shielding and air permeability, shield three fixed supported slabs 22 that are internally provided with of piece 5, and each two is fixed and propped up
Be provided with the stalloy 23 that is superimposed between plate 22 and fixed supported slab 22 and shielding 5 inwall of piece between, stalloy 23 it be a kind of
The extremely low silicon-iron soft magnetic alloy of carbon containing, general silicon content are 0.5～4.5%.Add silicon improve the resistivity and maximum magnetic flux of ferrum
Conductance, reduces coercivity and magnetic aging, in order to reduce eddy-current loss, is built up with stalloy 23 insulated from each other. makes to flow narrow yearningly
In elongated loop, by less section, to increase the electricity limit on eddy current path, cut-off waveguide ventilating board 4 is away from casing 1
Side is provided with two bakelite bolts 7, and two bakelite bolts 7 positioned at the top and bottom of connecting rod 3, the spiral shell of bakelite bolt 7
Stricture of vagina end sequentially passes through cut-off waveguide ventilating board 4 and casing 1 and extends to the outside of casing 1, extends to the bakelite spiral shell outside casing 1
The bakelite nut 8 that one end of bolt 7 is arranged with 1 outer surface of casing is threadedly coupled, by arranging bakelite bolt 7 and bakelite nut 8
Coordinate, make the magnetic flux that transformator is produced that the surface of casing 1 is transferred to without going past common metal bolt, exist so as to reduce transformator
The loss of vortex and magnetic hysteresis is caused in use to casing 1, so as to improve the service life of fuel tank, connecting rod 3 and shielding piece 5
Junction is provided with electromagnetic sealing liner 9, and the mode for solving electromagnetic slot-leakage is with electromagnetic sealing liner 9 at gap.Electricity
Magnetic seal liner 9 is a kind of conductive elastomeric material, and it can keep the conducting continuity at gap, and the bottom for shielding piece 5 is solid
Surely the first ground strip 10 is connected with, the first ground strip 10 runs through casing 1 and extends in base 2 away from one end of shielding piece 5
Portion is fixedly connected with earth plate 11, and earth plate 11 is located at the bottom of 2 inwall of base, and fixed plate 6 is arranged near the side of connecting rod 3
There are two fixed pin shafts 12, and two fixed pin shafts 12 respectively positioned at the top and bottom of connecting rod 3, fixed plate 6 is away from connection
The side of bar 3 is fixedly connected with guide card 13 by fixed pin shaft 12, arranges guide card 13, when electromagnetic field is propagated in conducting medium,
The amplitude of its field quantity E and H is exponentially decayed with the increase of distance.From the viewpoint of energy, electromagnetic wave is in conducting medium
There is energy loss during middle propagation, therefore, show as the reduction of field quantity amplitude.The field quantity of conductive surface is maximum, more gos deep in conductor
Portion, field quantity are less.This phenomenon is also referred to as Kelvin effect.Using Kelvin effect can prevent frequency electromagnetic waves penetrate good conductor and
Electromagnetic screen is made, the bottom of guide card 13 is fixedly connected with the second ground strip 14, and the second ground strip 14 is away from guide card 13
One end is run through casing 1 and extends to the inside of base 2 and is fixedly connected with earth plate 11, and the bottom of earth plate 11 is provided with grounding head
15, the quantity at least four of grounding head 15, and grounding head 15 is in being equally spaced, and is four by arranging grounding head 15 minimum, and
It is equally spaced, maximizes the magnetic flux of the transmission of grounding head 15, and being equally spaced makes the magnetic flux of transmission evenly more thorough, grounding head
15 run through base 2 and extend to the outside of base 2 away from one end of earth plate 11, and peace is fixed at the axis of 1 inwall bottom of casing
Equipped with fixed column 16, fixed column 16 away from 1 inwall of casing one end arrange cored 17 and iron core 17 positioned at two guide cards 13 it
Between, the both sides of iron core 17 are socketed with coil 18, and oil inlet pipe 19 is provided with the left of casing front surface, the right side on surface after casing 1
Side is provided with flowline 20.
When user is used, magnetic flux is produced by the iron core 17 in oil tank of transformer, through the magnetic flux of 13 pairs of generations of guide card
Carry out being transferred to earth plate 11 from guide card 13 and the second ground strip 14, the magnetic flux for shielding 5 pairs of residuals of piece is shielded, and prevents residual
Flux transfer to casing 1, through shielding the flux transfer of the first ground strip 10 of 5 bottom of piece residual to earth plate 11, then
By the grounding head 15 of 11 bottom of earth plate, flux transfer is made to ground, then can be to can be with during ventilation by cut-off waveguide ventilating board 4
Carry out to magnetic shield.
In sum, the transformer oil tank magnetic shield structure, is coordinated by arranging guide card 13 and the second ground strip 14, makes ferrum
The magnetic field produced between core 17 and coil 18, can be transferred to earth plate 11 through guide card 13 and the second ground strip 14, then by connecing
The grounding head 15 of 11 bottom of floor reaches degaussing to ground magnetic field transmission, while by shielding piece 5 and cut-off waveguide ventilating board 4
Cooperation, allow fuel tank ventilation when magnetic flux is shielded, so as to reduce the temperature of fuel tank, shield effectiveness is good, ventilation
Effect is good, reduces the temperature of fuel tank, reduces transformator and causes vortex and magnetic hystersis loss in use to fuel tank, improves oil
The service life of case.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
Be appreciated that these embodiments can be carried out various changes in the case of without departing from principle of the present utility model and spirit, repair
Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (5)
1. a kind of transformer oil tank magnetic shield structure, including casing (1) and base (2), it is characterised in that：Base (2) position
In the bottom of casing (1), the inwall of the casing (1) is symmetrically arranged with connecting rod (3), and the connecting rod (3) is away from casing (1)
One end of inwall sequentially passes through cut-off waveguide ventilating board (4) and shielding piece (5) is fixedly connected with fixed plate (6), and cut-off waveguide
Ventilating board (4) is fitted with the inwall of casing, the cut-off waveguide ventilating board (4) away from casing (1) side be provided with two it is electric
Blunt bolt (7), and two bakelite bolts (7) are positioned at the top and bottom of connecting rod (3), the end of thread of the bakelite bolt (7)
Sequentially pass through cut-off waveguide ventilating board (4) and casing (1) and extend to the outside of casing (1), extend to the outside electricity of casing (1)
The bakelite nut (8) that one end of blunt bolt (7) is arranged with casing (1) outer surface is threadedly coupled, the connecting rod (3) with shielding piece
(5) junction is provided with electromagnetic sealing liner (9), and the bottom of shielding piece (5) is fixedly connected with the first ground strip (10),
First ground strip (10) is run through casing (1) away from one end of shielding piece (5) and extends to inside and the earth plate of base (2)
(11) it is fixedly connected, positioned at the bottom of base (2) inwall, the fixed plate (6) is near connecting rod (3) for the earth plate (11)
Side is provided with two fixed pin shafts (12), and two fixed pin shafts (12) respectively positioned at the top and bottom of connecting rod (3), institute
The side that fixed plate (6) is stated away from connecting rod (3) is fixedly connected with guide card (13) by fixed pin shaft (12), the guide card (13)
Bottom be fixedly connected with the second ground strip (14), second ground strip (14) runs through casing away from one end of guide card (13)
(1) and extend to the inside of base (2) and be fixedly connected with earth plate (11), the bottom of the earth plate (11) is provided with grounding head
(15), the grounding head (15) is run through base (2) and extends to the outside of base (2) away from one end of earth plate (11), described
It is installed with fixed column (16) at the axis of casing (1) inwall bottom, the fixed column (16) is away from the one of casing (1) inwall
End arranges cored (17) and iron core (17) is between two guide cards (13), and the both sides of the iron core (17) are socketed with coil
(18), it is provided with oil inlet pipe (19) on the left of the casing front surface, the casing (1) is provided with flowline on the right side of surface afterwards
(20)。
2. a kind of transformer oil tank magnetic shield structure according to claim 1, it is characterised in that：The cut-off waveguide ventilation
The surface of plate (4) offers vent (21), and vent (21) in cellular.
3. a kind of transformer oil tank magnetic shield structure according to claim 1, it is characterised in that：Shielding piece (5)
Three fixed supported slabs (22) are internally provided with, between each two fixed supported slab (22) and in fixed supported slab (22) and shielding piece (5)
The stalloy (23) of superposition is provided between wall.
4. a kind of transformer oil tank magnetic shield structure according to claim 1, it is characterised in that：The top of the casing (1)
Portion is installed with bushing (24), and the casing (1) is installed with low-tension bushing (2), and low-tension bushing (25) position
Between bushing (24).
5. a kind of transformer oil tank magnetic shield structure according to claim 1, it is characterised in that：The grounding head (15)
Quantity at least four, and grounding head (15) is in being equally spaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621027100.4U CN206076004U (en) | 2016-08-31 | 2016-08-31 | A kind of transformer oil tank magnetic shield structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621027100.4U CN206076004U (en) | 2016-08-31 | 2016-08-31 | A kind of transformer oil tank magnetic shield structure |
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| Publication Number | Publication Date |
|---|---|
| CN206076004U true CN206076004U (en) | 2017-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621027100.4U Active CN206076004U (en) | 2016-08-31 | 2016-08-31 | A kind of transformer oil tank magnetic shield structure |
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| CN (1) | CN206076004U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597739A (en) * | 2018-03-30 | 2018-09-28 | 吴江市华安电器有限公司 | Gas tube sign transformer |
-
2016
- 2016-08-31 CN CN201621027100.4U patent/CN206076004U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597739A (en) * | 2018-03-30 | 2018-09-28 | 吴江市华安电器有限公司 | Gas tube sign transformer |
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