CN110391074A - Low voltage lead structure and low-noise energy-saving environmental protection transformer - Google Patents
Low voltage lead structure and low-noise energy-saving environmental protection transformer Download PDFInfo
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- CN110391074A CN110391074A CN201910585425.6A CN201910585425A CN110391074A CN 110391074 A CN110391074 A CN 110391074A CN 201910585425 A CN201910585425 A CN 201910585425A CN 110391074 A CN110391074 A CN 110391074A
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- low pressure
- lead copper
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F2027/348—Preventing eddy currents
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- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses low voltage lead structures, it is affixed between two folders, iron core is set between two folders, the first head lead copper bar of low pressure, low pressure tail head lead copper bar pass through between iron core and folder, so as to fix the first head lead copper bar of low pressure and low pressure tail head lead copper bar while clamping iron core using folder；When each phase low-voltage coil is powered, the first head lead copper bar of low pressure is opposite with the current direction of low pressure tail head lead copper bar, make to generate two opposite magnetic fields of magnetic direction respectively around lead copper bar to cancel out each other, thus the eddy-current loss for reducing each lead copper bar and generating folder.Meanwhile this structure low-voltage lead copper bar is leptoprosopy in face of tank wall, it is less that the leakage field line of force that lead copper bar generates passes through tank wall, therefore can reduce the eddy-current loss of tank wall, transformer oil hot-spot at tank wall is reduced, to improve the service life of transformer.The invention also discloses low-noise energy-saving environmental protection transformer, the low voltage lead structure including front.
Description
Technical field
The present invention relates to field transformer more particularly to low voltage lead structure and low-noise energy-saving environmental protection transformers.
Background technique
The transformer core component of oil-immersed transformer is immersed in fuel tank, and transformer core component includes for fixing
The folder of iron core, case lid is arranged on fuel tank, and oil tank bottom is equipped with feet.
Existing oil-immersed transformer exists following insufficient:
Iron core is stacked by silicon steel sheet to be formed, and it is existing that iron core can generate under the action of alternating magnetic field magnetostriction
As magnetostriction is exactly variation of the silicon steel sheet with magnetic field, and small variation can occur for size, so as to cause the vibration of iron core
Dynamic, the vibration of iron core can generate noise.And low-voltage coil is wrapped on iron core, draws the first head lead of low pressure on low-voltage coil respectively
Copper bar and low pressure tail head lead copper bar, when iron coring vibration, will drive the first head lead copper bar of low-voltage coil, low pressure and low pressure tail head draws
Line copper bar synchronous vibration, therefore need to consolidate iron core, low-voltage coil, the first head lead copper bar of low pressure, low pressure tail head lead copper bar
Fixed, generating collision to avoid the first head lead copper bar of low pressure, low pressure tail head lead copper bar and cabinet causes to issue biggish noise.
As shown in Figure 1, since the first head lead copper bar 3 of existing low pressure, low pressure tail head lead copper bar 4 are spaced aparts,
In order to reduce the first head lead copper bar 3 of low pressure, low pressure tail head lead copper bar 4 arrives the distance of tank wall 17, usually by the first head lead of low pressure
Copper bar 3, low pressure tail head lead copper bar 4 are set to the outside of folder, and on folder the fixed bracket 25 of welding metal lead to its into
Row is fixed, or it is fixed by customizing the fixed bracket 25 of wooden lead, and this outlet method is not only at high cost,
And it is smaller to the distance of folder to make lead copper bar, and be lead copper bar wide face in face of folder, so the whirlpool generated on folder
Stream loss is larger, and hot-spot phenomenon is easy to produce at corresponding folder, and temperature of oil in transformer is caused to increase, and accelerates transformer
The insulation ag(e)ing of oil, shortens the service life of transformer.
In addition, the size w of the lead copper bar of this structure to tank wall is smaller, and the wide face of lead copper bar faces tank wall,
But a large amount of magnetic line of force passes through tank wall, the eddy-current loss generated on tank wall is larger, so that being easy to produce at corresponding tank wall
Raw hot-spot phenomenon, causes temperature of oil in transformer to increase, accelerates the insulation ag(e)ing of transformer oil, and that shortens transformer uses the longevity
Life.
" the power transformer handbook " of Xie Yucheng is the design considerations that current design of transformer personnel generally use, that is, is referred to
Document: power transformer handbook.Xie Yucheng.Chief editor.China Machine Press.Page 376.According to the design principle of transformer, this
Kind structure makes the wide face of lead copper bar in face of tank wall, and the distance in the wide face of lead copper bar to tank wall must obtain larger be just able to satisfy and want
It asks, i.e., this distance should get 1.5 times of the width dimensions of lead copper bar or more.The width dimensions of cabinet will be increased in this way,
Its result increases the weight of transformer box wall and transformer oil.
To sum up, the deficiency of above structure is:
(1) eddy-current loss of folder and tank wall is increased, that is, increases the load loss of transformer；
(2) since the outer dimension of low voltage lead structure is larger, the width dimensions of cabinet accordingly become larger, and increase transformer
Occupied area, cause capital cost higher, especially transformer outer dimension required to use under lesser occasion.
(3) folder and tank wall are easy to produce hot-spot, increase temperature of oil in transformer, and the insulation for accelerating transformer oil is old
Change, shortens the service life of transformer.When hot-spot is serious, transformer gas alarming or tripping are easily caused, transformation is caused
Device has a power failure.
(4) weight of tank wall and transformer oil is increased, that is, increases the dosage of steel and transformer oil, is unfavorable for ring
It protects.
Summary of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide low voltage lead structures.
The second object of the present invention is to provide low-noise energy-saving environmental protection transformer, can advantageously reduce noise and transformation
The load loss of device reduces the occupied area of transformer, and can be avoided tank wall occur hot-spot phenomenon lead to transformation
The reduced service life of device, to be beneficial to energy conservation environmental protection.
An object of the present invention adopts the following technical scheme that realization:
Low voltage lead structure, including the A phase low-voltage coil, B phase low-voltage coil and C phase low-voltage line being respectively wound around on iron core
Circle；
The low voltage lead structure further include the first head lead copper bar of low pressure, low pressure tail head lead copper bar, copper bar insulation board and
Two folders, draw the first head lead copper bar of low pressure and low pressure tail head lead copper bar on each phase low-voltage coil respectively, two folders it
Between it is affixed, the iron core is set between two folders, and the first head lead copper bar of the low pressure, low pressure tail head lead copper bar are from iron core and folder
It is passed through between part, and the two sides of the first head lead copper bar of the low pressure and low pressure tail head lead copper bar are respectively equipped with copper bar insulation board,
To guarantee insulation distance, by the first head lead copper bar of low pressure and low pressure tail head lead while so as to utilize folder to clamp iron core
Copper bar is fixed；
When the energization of each phase low-voltage coil, the current direction phase of the first head lead copper bar of low pressure and low pressure tail head lead copper bar
Instead, make to generate two opposite magnetic fields of magnetic direction around the first head lead copper bar of low pressure and low pressure tail head lead copper bar respectively,
The two magnetic fields can cancel out each other, so as to reduce the eddy-current loss that each lead copper bar and folder generate.
The second object of the present invention adopts the following technical scheme that realization:
Low-noise energy-saving environmental protection transformer, including mentioned-above low voltage lead structure, the low-noise energy-saving environmental protection become
Depressor further includes cabinet, and the inner cavity chamber for accommodating oil and low voltage lead structure, the low-voltage lead are formed in the cabinet
Structure is soaked in the oil, and then keeps the leptoprosopy of the first head lead copper bar of low pressure corresponding with tank wall position, to reduce the first head lead copper of low pressure
Area on row, low pressure tail head lead copper bar orthographic projection to tank wall, so as to reduce the outer dimension of low voltage lead structure, into
And reduce the width dimensions w of cabinet, and the leptoprosopy of the first head lead copper bar of low pressure faces tank wall, it reduces the first head lead copper bar of low pressure and produces
The raw leakage field line of force passes through tank wall, to reduce the eddy-current loss of tank wall, reduces transformer oil hot-spot at tank wall, in turn
Improve the service life of transformer.
Further, the low-noise energy-saving environmental protection transformer further includes case lid, and the case lid is covered on opening for inner cavity chamber
On mouth, be equipped with outlet terminal on the case lid, the outlet terminal respectively with the first head lead copper bar of low pressure, low pressure tail head lead
Copper bar electrical connection, is connected through a screw thread between the folder and case lid.
Further, the folder is described solid by hanging screw lock on case lid, being fixed with fixed plate on the case lid
Fixed hole is offered on fixed board, the screw rod that hangs connects the screw rod that hangs with fixed hole screw thread across the fixed hole
It connects, so that the folder be made to realize and connect by hanging screw rod and fixed plate.
Further, the low-noise energy-saving environmental protection transformer further includes feet, the feet be located at iron core and bottom it
Between, the feet is equipped with feet insulation board for providing a supporting role to iron core between the feet and iron core, the feet,
Feet insulation board is connected through a screw thread with folder, and the feet is abutted with bottom.
Further, the feet, feet insulation board are locked on folder by fastening bolt, are offered on the folder
Positioning through hole offers limiting through hole on the feet insulation board, connection through-hole, the fastening bolt is offered in the feet
Across the positioning through hole, limiting through hole, connection through-hole, the fastening bolt respectively with positioning through hole, limiting through hole, connect lead to
Hole is threadedly coupled, and is connected so that the folder be made to realize by fastening bolt and feet, and then iron core is made to pass through feet and bottom
Contact.
Further, vibration damping rubber mat is equipped between the feet and bottom.
Further, the feet is set as U-shaped structure, makes to be formed with chamber resettling in the feet, the vibration damping rubber mat
In chamber resettling.
Compared with prior art, the beneficial effects of the present invention are:
(1) effectively fixed, reduction vibration, reduction noise can be both carried out to low voltage lead structure, and can be effectively reduced
The eddy-current loss of folder and tank wall reduces the load loss of transformer；
(2) since the outer dimension of low voltage lead structure becomes smaller, the width dimensions of cabinet reduce accordingly, can effectively drop
Transformer room's occupied area of the occupied area of low transformer, electric room can also accordingly reduce, and can save capital cost, especially
It is suitble to require lesser occasion to use transformer outer dimension；
(3) folder and tank wall due to eddy-current loss it is smaller, hot-spot will not be generated, the fortune of transformer can be effectively ensured
The row service life；
(4) weight that can reduce cabinet and transformer oil, that is, reduce the dosage of steel and transformer oil, has preferable
Environment protecting.
Detailed description of the invention
Fig. 1 is a kind of positive structure diagram of oil-immersed transformer in the prior art；
Fig. 2 is the side structure schematic view of Fig. 1；
Fig. 3 is another positive structure diagram of oil-immersed transformer in the prior art；
Fig. 4 is the side structure schematic view of Fig. 3；
Fig. 5 is drawing a kind of structural schematic diagram of angle of screw rod in oil-immersed transformer in the prior art；
Fig. 6 is positioning a kind of structural schematic diagram of angle of angle steel in oil-immersed transformer in the prior art；
Fig. 7 is the structural schematic diagram for positioning angle steel another kind angle in oil-immersed transformer in the prior art；
Fig. 8 is the structural schematic diagram of locating pin in oil-immersed transformer in the prior art；
Fig. 9 is positive structure diagram of the invention；
Figure 10 is the side structure schematic view of Fig. 9；
Figure 11 is the wiring diagram of Fig. 9；
Figure 12 is the positive structure diagram that screw rod is hung in the present invention；
Figure 13 is the overlooking structure diagram that screw rod is hung in the present invention；
Figure 14 is A-A of the invention to schematic cross-sectional view；
Figure 15 is B-B direction schematic cross-sectional view of the invention.
In figure: 1, iron core；2, upper clamping piece；3, the first head lead copper bar of low pressure；4, low pressure tail head lead copper bar；5, outlet terminal
a；6, outlet terminal b；7, outlet terminal c；8, outlet terminal o；9, case lid；10, screw rod is hung；11, lower clamping piece；12, feet；13,
Feet insulation board；14, copper bar insulation board；15, fastening bolt；16, vibration damping rubber mat；17, tank wall；18, platform sling；19, screw rod is drawn；
20, angle steel is positioned；21, locating pin；22, cushion block；23, bottom；24, fixed plate；25, the fixed bracket of lead；26, stud.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
The low-noise energy-saving environmental protection transformer as shown in Fig. 9-15, comprising:
Cabinet and low voltage lead structure are formed with the inner cavity chamber for accommodating oil and low voltage lead structure, low pressure in cabinet
Pin configuration soaks in the oil；
Low voltage lead structure includes three iron cores 1, and three iron cores 1 are set in inner cavity chamber；
Low voltage lead structure further includes A phase low-voltage coil, B phase low-voltage coil and C phase low-voltage coil, A phase low-voltage coil, B
Phase low-voltage coil and C phase low-voltage coil are respectively wound around on three iron cores 1；
Low voltage lead structure further includes the first head lead copper bar 3 of low pressure, low pressure tail head lead copper bar 4,14 and of copper bar insulation board
Two folders, the folder include upper clamping piece 2 and lower clamping piece 11, draw the first head lead copper bar 3 of low pressure on each phase low-voltage coil respectively
Affixed between two upper clamping pieces 2 with low pressure tail head lead copper bar 4, the iron core 1 is set between two upper clamping pieces 2, the low pressure
First head lead copper bar 3, low pressure tail head lead copper bar 4 pass through between iron core 1 and upper clamping piece 2, and the first head lead copper of the low pressure
The two sides of row 3 and low pressure tail head lead copper bar 4 are respectively equipped with copper bar insulation board 14, to guarantee insulation distance, so as to utilize
Upper clamping piece 2 clamps while iron core 1 that the first head lead copper bar 3 of low pressure and low pressure tail head lead copper bar 4 is fixed.
The upper end of iron core 1 is equipped with upper clamping piece 2, and a copper bar insulation board 14 is set between upper clamping piece 2 and iron core 1, and low pressure
First head lead copper bar 3 and low pressure tail head lead copper bar 4 are respectively arranged on the two sides of the copper bar insulation board 14, make the two lead copper bars
Mutually against arrangement, to keep the leptoprosopy of each lead copper bar corresponding with 17 position of tank wall, make each lead copper bar orthographic projection to tank wall
Area on 17 is smaller, to keep the outer dimension of low voltage lead structure smaller, and then reduces the width dimensions w of cabinet, respectively draws
Copper bar insulation board 14 is respectively equipped between line copper bar and upper clamping piece 2, iron core 1, to guarantee insulation distance.
Low-noise energy-saving environmental protection transformer further includes outlet terminal a5, outlet terminal b6, outlet terminal c7 and outlet terminal
O8, outlet connection type are as follows: the lead copper bar x and outlet terminal of lead copper bar a and A the phase low-voltage coil of A phase low-voltage coil
A5 electrical connection, the lead copper bar y of lead copper bar b and B the phase low-voltage coil of B phase low-voltage coil are electrically connected with outlet terminal b6, C phase
The lead copper bar z of lead copper bar c and C the phase low-voltage coil of low-voltage coil is electrically connected with outlet terminal c7, and A phase low-voltage coil draws
The lead copper bar z of lead copper bar y, C phase low-voltage coil of line copper bar x, B phase low-voltage coil passes through 0 phase terminal copper bar o and leading-out terminal
Sub- o8 electrical connection；
As shown in Figs 1-4, compared with prior art, the first head lead copper bar 3 of low pressure, low pressure tail head lead in the present embodiment
Copper bar 4 is closely packed together, the current direction when the energization of each phase low-voltage coil, mutually against two lead copper bars of arrangement
On the contrary, generating two opposite magnetic fields of magnetic direction around the two lead copper bars respectively, the two magnetic fields can mutually be supported
Disappear, so as to reduce the eddy-current loss that each lead copper bar and upper clamping piece generate.Meanwhile above-mentioned outlet method, lead copper bar
Size w to tank wall 17 is larger, and the leptoprosopy of lead copper bar faces tank wall 17, and at this moment the only lesser magnetic line of force passes through tank wall
17, the eddy-current loss generated on tank wall 17 is smaller, reduces transformer oil hot-spot at tank wall, and then improve transformer
Service life.
To sum up, as shown in Fig. 2, Fig. 4 and Figure 10, if coil and 1 center line of iron core are h, distance of the h to 2 outer rim of upper clamping piece
For B1,2 outer rim of upper clamping piece to the outermost distance of low pressure tail head lead copper bar 4 is B2, and 4 outermost of low pressure tail head lead copper bar arrives
The size of tank wall is W, and the distance of h to tank wall is set as B, and the radius of coil is R, and the size of coil to tank wall 17 is V.It gives birth according to thanking
The design principle of transformer in " the power transformer handbook " page 376 in city, as shown in Figures 2 and 4, transformation in the prior art
Device, 1/2 fuel tank width B=B1+B2+W=B1+B2+1.5b, wherein B1 is definite value, and head and the tail lead copper bar width is set as b, W=
1.5b.This structure makes the wide face of lead copper bar in face of tank wall, and the size of low pressure tail head lead copper bar 4 outermost to tank wall is necessary
Obtain it is larger can just meet the requirements, i.e., this distance should get 1.5 times or more of head and the tail lead copper bar width dimensions.It will increase in this way
The big width dimensions of cabinet lead to increased costs as a result, increasing the weight of transformer box wall 17 and transformer oil.
And the low-noise energy-saving environmental protection transformer in the present embodiment, as shown in Figure 10,1/2 fuel tank width B=B1+W=B1+
B, wherein B1 is definite value, and head and the tail lead copper bar width is set as b, W=b.According to the design principle of transformer, the low pressure of the present embodiment
Pin configuration is the leptoprosopy of lead copper bar in face of tank wall 17, the distance of leptoprosopy to the tank wall 17 of lead copper bar can obtain it is smaller,
Generally, W gets head and the tail lead copper bar width dimensions, i.e. W=b.In this way, compared with prior art, it is possible to reduce cabinet
Width dimensions so that the weight of transformer-cabinet and transformer oil is effectively reduced, cost is reduced.
In this way, its advantages include at least:
1, effectively fixed, reduction vibration, reduction noise can be both carried out to low voltage lead structure, and can be effectively reduced
The eddy-current loss of folder 2 and tank wall 17 reduces the load loss of transformer；
2, since the outer dimension of low voltage lead structure becomes smaller, the width dimensions of cabinet reduce accordingly, can effectively drop
Transformer room's occupied area of the occupied area of low transformer, electric room can also accordingly reduce, and can save capital cost, especially
It is suitble to require lesser occasion to use transformer outer dimension；
3, upper clamping piece 2 and tank wall 17 due to eddy-current loss it is smaller, hot-spot will not be generated, transformer can be effectively ensured
Service life；
4, the weight of cabinet and transformer oil can be reduced, that is, reduces the dosage of steel and transformer oil, is had preferable
Environment protecting.
It should be noted that as shown in figs. 9-11, the low-noise energy-saving environmental protection transformer in the present embodiment further includes case lid
9, case lid 9 is covered in the opening of inner cavity chamber, and outlet terminal a5, outlet terminal b6, outlet terminal c7 and outlet terminal o8 can
Case lid 9 is worn, iron core 1 is connect with case lid 9 by upper clamping piece 2, is connected through a screw thread between upper clamping piece 2 and case lid 9.
In the present embodiment, the material of each insulation board is preferably insulating board.
As viewed in figures 5-8, in the prior art, the connection between upper clamping piece 2 and case lid 9 uses platform sling 18, platform sling 18
Mechanical strength is poor, and for transformer in transport and installation process, low voltage lead structure is easy to produce displacement.Upper clamping piece 2 is equipped with
Platform sling 18 and supporting plate for fixing conductor grip, the platform sling 18 and supporting plate are welded on upper clamping piece 2, and welding procedure is unfavorable for
The occupational health of worker, environmental-protecting performance are poor.
It is noted that as shown in figs. 12-15, the lower end of iron core 1 is equipped with two lower clamping pieces 11, two institutes in the present embodiment
It is any affixed by hanging screw rod 10 respectively between the two to state upper clamping piece 2, two lower clamping pieces 11, square frame is formed, thus will
The first head lead copper bar 3 of iron core 1, low pressure and low pressure tail head lead copper bar 4 are fixed.
It is emphasized that as shown in figs. 12-15, the upper clamping piece 2 in the present embodiment is locked in case lid 9 by hanging screw rod 10
On, it is fixed with fixed plate 24 on case lid 9, fixed hole is offered in fixed plate 24, it is logical that the first installation is offered on upper clamping piece 2
Screw rod 10 is hung across fixed hole, the first installation through-hole in hole, makes to hang screw rod 10 and fixed hole, the first installation through-hole screw thread connect
It connects, to make upper clamping piece 2 realize and connect by hanging screw rod 10 and fixed plate 24, and then it is interior to be fixed on iron core 1 by upper clamping piece 2
In chamber.Fixed plate 24 in the present embodiment is preferably angle steel.
Specifically, the second installation through-hole is offered on lower clamping piece 11, hangs screw rod 10 across the second installation through-hole, hangs screw rod 10
It is threadedly coupled with the second installation through-hole.
In addition, as viewed in figures 5-8, in the prior art, feet 12 uses the structure with location hole, and welds in feet 12
There are two studs 26, feet 12 is fixedly connected by the stud 26 with lower clamping piece 11, and there are welding procedures when feet 12 makes, not only
It is easily deformed feet 12, is also unfavorable for the occupational health of worker, environmental-protecting performance is poor, while feet 12 directly connects with bottom 23
Touching, the vibration of low voltage lead structure can pass to bottom 23 by feet 12, then pass to air dielectric by bottom 23, therefore become
Depressor noise is larger.This structure is positioned using locating pin 21, high to the required precision of the position dimension of locating pin 21, if partially
Difference is larger, and in nowel, the location hole in feet 12 is not easy to be directed at locating pin the transformer body including low voltage lead structure
21, to cause transformer body nowel difficult.Connection between upper clamping piece 2 and case lid 9 uses platform sling 18, due to platform sling 18
Mechanical strength is poor, it is necessary to be positioned using the positioning angle steel 20 connecting with upper clamping piece 2, when the inner cavity scale error of tank wall 17
When larger, or positioning angle steel 20 itself size and location scale error it is larger when, it is tired to will also result in transformer body nowel
It is difficult.
Moreover, as viewed in figures 5-8, cushion block 22 being equipped between feet 12, lower clamping piece 11 and iron core 1 in the prior art, that is, is padded
Foot 12 is connect by cushion block 22 with lower clamping piece 11, and insulation board is equipped between feet 12 and cushion block 22, since the structure is equipped with cushion block
22, so that material and cost of labor are higher, production efficiency is lower.
As shown in figs. 12-15, low voltage lead structure in the present embodiment further includes feet 12, and feet 12 is located at iron core 1
Between bottom 23, feet 12 is equipped with feet insulation board 13 for providing a supporting role to iron core 1 between feet 12 and iron core 1,
Feet 12, feet insulation board 13 and lower clamping piece 11 are connected through a screw thread, and feet 12 is abutted with bottom 23.
More preferably embodiment is that as shown in figs. 12-15, feet 12, feet insulation board 13 in the present embodiment pass through tight
Fixing bolt 15 is locked on lower clamping piece 11, and positioning through hole is offered on lower clamping piece 11, and it is logical that limit is offered on feet insulation board 13
Hole, connection through-hole is offered in feet 12, and fastening bolt 15 passes through positioning through hole, limiting through hole, connection through-hole, fastening bolt 15
Respectively with positioning through hole, limiting through hole, connect through hole whorl connection, so that lower clamping piece 11 be made to pass through fastening bolt 15 and feet 12
It realizes connection, and then contacts iron core 1 with bottom 23 by feet 12.
Preferably, as shown in FIG. 12 and 15, vibration damping rubber mat 16 is equipped between the feet 12 in the present embodiment and bottom 23.
In the present embodiment, as shown in FIG. 12 and 15, the feet 12 in the present embodiment is set as U-shaped structure, makes feet 12
On be formed with chamber resettling, vibration damping rubber mat 16 is set in chamber resettling.
It is understood that as shown in figs. 12-15, the connection in the present embodiment between upper clamping piece 2 and case lid 9, which uses, hangs spiral shell
Bar 10 hangs the intensity of screw rod 10 considerably beyond the intensity of platform sling 18, such as when platform sling 18 is identical with the sectional area for hanging screw rod 10
This, so that the connection integral strength of low voltage lead structure and case lid 9 is preferable, thus make transformer in transport and installation process,
Low voltage lead structure is not allowed to be also easy to produce displacement.Without can further mention using the positioning angle steel 20 being connect with upper clamping piece 2
High efficiency.It is positioned according to positioning angle steel 20, when the inner cavity scale error of tank wall 17 is larger, or positioning angle steel
20 itself size and location scale error it is larger when, it is difficult to will also result in transformer body nowel.
As shown in figs. 12-15, the supporting plate of no setting is required on the upper clamping piece 2 in the present embodiment platform sling 18 and fixed conductor grip,
Make there is no weldment on upper clamping piece 2, so that structure process is simple, production efficiency is higher, can save material and cost of labor.By
Reduce welding procedure in process of production in the upper clamping piece 2, is conducive to the occupational health of worker, compared with prior art, more
Safety is more environmentally friendly.
As shown in figs. 12-15, the feet 12 in the present embodiment uses U-shaped structure, is equipped with vibration damping rubber mat 16 in chamber resettling,
The vibration damping rubber mat 16 is contacted with bottom 23, on the one hand can reduce transformer generation noise (when transformer station high-voltage side bus, 1 He of iron core
Coil can vibrate and generate noise, and vibration can pass to bottom 23 by feet 12, then pass to air by bottom 23 and be situated between
Matter), on the other hand, since vibration damping rubber mat 16 and the frictional force of bottom 23 are larger, so that transformer is during transportation, feet 12
Do not allow to be also easy to produce displacement between bottom 23, and then can effectively ensure that each coil of transformer and lead copper bar between tank wall 17
Insulation distance.Compared with prior art, the present embodiment locating pin 21 that no setting is required positions feet 12, can effectively reduce
Weldment in bottom 23.
In addition, as shown in figs. 12-15, the connection between the feet 12 in the present embodiment and lower clamping piece 11 uses fastening bolt
15 and nut be fixed, without cushion block 22 in the prior art, saved material and labour cost, be conducive to improve life
Produce efficiency.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (8)
1. low voltage lead structure, which is characterized in that including be respectively wound around on iron core A phase low-voltage coil, B phase low-voltage coil and
C phase low-voltage coil；
The low voltage lead structure further includes the first head lead copper bar of low pressure, low pressure tail head lead copper bar, copper bar insulation board and two folders
Part is drawn the first head lead copper bar of low pressure and low pressure tail head lead copper bar on each phase low-voltage coil respectively, is led between two folders
Cross that hang screw rod affixed, the iron core is set between two folders, and the first head lead copper bar of the low pressure, low pressure tail head lead copper bar are from iron
It is passed through between the heart and folder, and to be respectively equipped with copper bar exhausted for the two sides of the first head lead copper bar of the low pressure and low pressure tail head lead copper bar
Listrium, to guarantee insulation distance, by the first head lead copper bar of low pressure and low pressure tail while so as to utilize folder to clamp iron core
Head lead copper bar is fixed；
When each phase low-voltage coil is powered, the current direction of the first head lead copper bar of low pressure and low pressure tail head lead copper bar is on the contrary, make
Two opposite magnetic fields of magnetic direction are generated around the first head lead copper bar of low pressure and low pressure tail head lead copper bar respectively, the two
Magnetic field can cancel out each other, so as to reduce the eddy-current loss that each lead copper bar and folder generate.
2. low-noise energy-saving environmental protection transformer, which is characterized in that described including low voltage lead structure as described in claim 1
Low-noise energy-saving environmental protection transformer further includes cabinet, and the inner cavity for accommodating oil and low voltage lead structure is formed in the cabinet
Room, the low voltage lead structure leaching in the oil, and then keeps the leptoprosopy of the first head lead copper bar of low pressure corresponding with tank wall position, to reduce
Area on the first head lead copper bar of low pressure, low pressure tail head lead copper bar orthographic projection to tank wall, so as to reduce low-voltage lead knot
The outer dimension of structure, and then reduce the width dimensions w of cabinet, and the leptoprosopy of the first head lead copper bar of low pressure faces tank wall, it reduces low
The leakage field line of force for pressing first head lead copper bar to generate passes through tank wall, to reduce the eddy-current loss of tank wall, reduces transformer oil in case
Hot-spot at wall, and then improve the service life of transformer.
3. low-noise energy-saving environmental protection transformer as claimed in claim 2, it is characterised in that: the low-noise energy-saving environmental protection transformation
Device further includes case lid, and the case lid is covered in the opening of inner cavity chamber, and outlet terminal, the leading-out terminal are equipped on the case lid
Son is electrically connected with the first head lead copper bar of low pressure, low pressure tail head lead copper bar respectively, is connected between the folder and case lid by screw thread
It connects.
4. low-noise energy-saving environmental protection transformer as claimed in claim 3, it is characterised in that: the folder is by hanging screw lock
In on case lid, being fixed with fixed plate on the case lid, fixed hole is offered in the fixed plate, the screw rod that hangs is across described
Fixed hole, make it is described hang screw rod and be threadedly coupled with fixed hole, to make the folder by hanging screw rod and fixed plate realization
Connection.
5. low-noise energy-saving environmental protection transformer as claimed in claim 2, it is characterised in that: the low-noise energy-saving environmental protection transformation
Device further includes feet, and the feet is between iron core and bottom, and the feet is for providing a supporting role iron core, the pad
Feet insulation board is equipped between foot and iron core, the feet, feet insulation board and folder are connected through a screw thread, the feet and case
Bottom abuts.
6. low-noise energy-saving environmental protection transformer as claimed in claim 5, it is characterised in that: the feet, feet insulation board are logical
It crosses fastening bolt to be locked on folder, positioning through hole is offered on the folder, it is logical that limit is offered on the feet insulation board
Hole, connection through-hole is offered in the feet, and the fastening bolt passes through the positioning through hole, limiting through hole, connection through-hole, institute
State fastening bolt respectively with positioning through hole, limiting through hole, connect through hole whorl connection, so that the folder be made to pass through fastening bolt
It realizes and connects with feet, and then contact iron core with bottom by feet.
7. low-noise energy-saving environmental protection transformer as claimed in claim 6, it is characterised in that: be equipped between the feet and bottom
Vibration damping rubber mat.
8. such as the described in any item low-noise energy-saving environmental protection transformers of claim 5-7, it is characterised in that: the feet is set as U
Shape structure makes to be formed with chamber resettling in the feet, and the vibration damping rubber mat is set in chamber resettling.
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| CN201910585425.6A CN110391074B (en) | 2019-07-01 | 2019-07-01 | Low-noise energy-saving environment-friendly transformer |
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| CN201910585425.6A CN110391074B (en) | 2019-07-01 | 2019-07-01 | Low-noise energy-saving environment-friendly transformer |
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| CN110391074B CN110391074B (en) | 2020-10-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421754A (en) * | 2020-08-14 | 2021-09-21 | 特变电工衡阳变压器有限公司 | Transformer and power generation system |
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| CN206059116U (en) * | 2016-06-30 | 2017-03-29 | 山东华驰变压器股份有限公司 | A kind of distribution transforming transformer low-voltage lead structure |
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| CN207529792U (en) * | 2017-11-13 | 2018-06-22 | 山东鲁圣电气设备有限公司 | A kind of transformer low-voltage lead structure |
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| US4588974A (en) * | 1984-08-15 | 1986-05-13 | Standex International Corporation | Coil assembly having clamped and bonded contacts |
| CN201639809U (en) * | 2010-04-07 | 2010-11-17 | 湖北天方科技有限公司 | Energy-saving bus of submerged arc furnace |
| CN203338920U (en) * | 2013-07-01 | 2013-12-11 | 宁波仁栋电气有限公司 | Oil-immersed transformer |
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| CN110391074B (en) | 2020-10-13 |
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Application publication date: 20191029 Assignee: Shenzhen lidashun Technology Co., Ltd Assignor: Guangzhou Yibian Electrical Equipment Co., Ltd Contract record no.: X2021440000214 Denomination of invention: Low noise, energy saving and environmental protection transformer Granted publication date: 20201013 License type: Common License Record date: 20211109 |
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