CN108831720B - Tapping area structure of dry-type transformer - Google Patents
Tapping area structure of dry-type transformer Download PDFInfo
- Publication number
- CN108831720B CN108831720B CN201810569598.4A CN201810569598A CN108831720B CN 108831720 B CN108831720 B CN 108831720B CN 201810569598 A CN201810569598 A CN 201810569598A CN 108831720 B CN108831720 B CN 108831720B
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- China
- Prior art keywords
- tapping
- dry
- shell
- type transformer
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 73
- 238000007789 sealing Methods 0.000 claims description 10
- 239000011810 insulating material Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 241000219098 Parthenocissus Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- H01F27/02—Casings
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The utility model relates to a tapping point area structure of a dry-type transformer. The tapping zone structure of the dry-type transformer comprises a coil and tapping boxes arranged on the coil, the tapping boxes comprise a shell and tapping points arranged in the shell, the tapping points are distributed in an annular mode, creepage ridges are arranged between two adjacent tapping points, and the end portions, close to the center of the tapping boxes, of each creepage ridge are connected with each other to form a whole so that each tapping point is located in a corresponding independent containing cavity. The ends of the creepage ridge, which are close to the center of the tapping box, are mutually connected into a whole, the tapping points are positioned in the respective relatively independent accommodating cavities, and all the tapping points are electrically connected through connecting sheets only, when water and impurities are mixed to form conductive substances, the conductive substances are mutually isolated by the whole body formed by the creepage ridge, the insulation distance between the tapping points is unchanged, and the safe operation of the transformer is ensured.
Description
Technical Field
The utility model relates to a tapping point area structure of a dry-type transformer.
Background
When the dry-type transformer is manufactured, a tapping area comprising a plurality of taps is arranged on a coil of the dry-type transformer, and an operator can connect different taps according to needs, so that the output voltage of the dry-type transformer is adjusted. Existing dry-type transformers are generally provided with two rows of taps in parallel along the axial direction of the coil, and in order to secure a sufficient insulation distance between the high-voltage terminal and the taps, the dry-type transformer needs to have a sufficient height, resulting in an increase in weight of the dry-type transformer.
The Chinese patent with the authorized bulletin number of CN203966792U and the authorized bulletin day of 2014.11.26 discloses a dry-type transformer closed tapping box, which comprises a coil, high-voltage connector heads are arranged on the coil along the axial direction of the coil at intervals, a tapping box is arranged between the high-voltage connector heads and comprises a shell, six connecting terminals (namely tap heads) distributed in a ring shape are arranged in the shell, creepage ridges are arranged between two adjacent tap heads, the end parts of each creepage ridge, which are close to the center of the tapping box, are discontinuous and have intervals, a connecting sheet is connected between the two tap heads, and an insulating cover body (namely a cover plate) is connected to the top surface of the shell through screws.
When the dry-type transformer is used, the taps in the tapping box are distributed along the circumferential direction of the dry-type transformer, so that the space occupied by the taps along the axial direction of the coil is reduced, and the axial length of the coil can be reduced under the condition of ensuring the insulation distance between the high-voltage wire heads and the taps. However, when the working environment of the dry-type transformer is severe, even if the cover plate is arranged on the shell, moisture and impurities in the air cannot be completely prevented from entering the tapping box, the moisture and the impurities are accumulated among the intervals after entering the tapping box, the moisture and the impurities are mixed to form conductive substances, the insulating distance among the taps is reduced by the conductive substances, and short circuits can occur among the taps even when the working environment is severe, so that the safe working of the dry-type transformer is affected.
Disclosure of Invention
The utility model aims to provide a tapping zone structure of a dry-type transformer, which solves the problems that in the prior art, the ends of creepage ridges in the tapping box, which are close to the center of the tapping box, are not connected and have intervals, the insulation distance between all tapping points is smaller, and the safe operation of the dry-type transformer is affected.
In order to solve the technical problems, the technical scheme of the tapping point area structure of the dry-type transformer is as follows:
the tapping zone structure of the dry-type transformer comprises a coil and tapping boxes arranged on the coil, wherein the tapping boxes comprise a shell and tapping points arranged in the shell, the tapping points are distributed in an annular mode, creepage ridges are arranged between two adjacent tapping points, and the end portions, close to the center of the tapping boxes, of each creepage ridge are connected with each other to form a whole so that each tapping point is located in a corresponding independent containing cavity.
The beneficial effect of this technical scheme lies in: the ends of the creepage ridge, which are close to the center of the tapping box, are mutually connected into a whole, the tapping points are positioned in the respective relatively independent accommodating cavities, and all the tapping points are electrically connected through connecting sheets only, when water and impurities are mixed to form conductive substances, the conductive substances are mutually isolated by the whole body formed by the creepage ridge, the insulation distance between the tapping points is unchanged, and the safe operation of the transformer is ensured.
A cover plate is arranged on the shell of the tapping box, and a sealing rubber pad made of insulating materials is arranged between the cover plate and the shell. The sealing gasket can increase the tightness between the shell and the cover plate, reduce the amount of water and impurities entering the shell, and simultaneously enhance the insulation performance between the shell and the cover plate.
The shell is provided with a threaded hole, the shell is connected with the cover plate through an insulating screw, and the sealing rubber pad is sleeved on the insulating screw. The insulating screw is non-conductive, so that the influence of floating potential formed at the screw on the insulating effect of the tapping region can be avoided.
The shell is provided with an embedded screw sleeve, the threaded hole is formed by an inner hole of the embedded screw sleeve, and the embedded screw sleeve is made of insulating materials. The embedded screw sleeve is made of insulating materials, so that the shell can be prevented from having suspension potential at the screw sleeve.
The dry-type transformer tapping point area structure further comprises high-voltage wiring columns which are arranged at intervals along the axial direction of the coil, and the high-voltage wiring columns and the tapping box are arranged on two opposite sides of the coil. The high-voltage wiring column and the tapping box are arranged on two opposite sides of the coil, the radial size of the coil is effectively utilized to increase the distance between the tapping box and the high-voltage wiring column, so that the distance between the high-voltage wiring columns can be reduced, and the axial size of the coil is further reduced.
Drawings
FIG. 1 is a schematic diagram of a dry-type transformer tap area structure according to embodiment 1 of the present utility model;
FIG. 2 is a right side view of the dry-type transformer tap area configuration of FIG. 1;
FIG. 3 is a top view of the dry-type transformer tap area configuration of FIG. 1;
fig. 4 is a schematic structural diagram of embodiment 2 of the tapping point structure of the dry-type transformer according to the present utility model.
Each mark in the figure: 1. a coil; 2. a high voltage terminal; 3. a housing; 4. sealing rubber cushion; 5. a connecting sheet; 6. a cover plate; 7. a tap; 8. embedding a threaded sleeve; 9. and (5) climbing a ridge.
Detailed Description
Embodiments of the present utility model will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 3, an embodiment 1 of a tapping point structure of a dry-type transformer according to the present utility model includes a coil 1, two high-voltage terminals 2 are arranged on the coil 1 at intervals along an axial direction thereof, one of the two high-voltage terminals 2 is a head terminal, and the other is a tail terminal.
The dry-type transformer tapping point structure still includes the tapping box of setting on coil 1, and tapping box and high-voltage terminal 2 set up respectively in the both sides of coil 1 that are opposite to each other, can utilize coil 1's radial dimension to guarantee the insulating distance between tapping box and the high-voltage terminal 2 to reduce the distance between two high-voltage terminals 2, and then reduce coil 1's axial dimension.
The tapping box comprises a cylindrical shell 3 and tapping points 7 arranged in the shell 3, wherein six tapping points 7 are arranged in total, the six tapping points 7 are distributed in an annular shape along the circumferential direction of the shell 3, and the tapping points 7 are formed by inner screws embedded in the shell 3; in other embodiments, the taps may be four, eight, etc. in other numbers; the housing may also be of a cubic configuration. A connecting piece 5 is arranged between two taps, and the connecting piece 5 can be connected with different two taps so as to regulate the output voltage of the dry-type transformer.
A creepage ridge 9 is arranged between two adjacent tap joints 7, the creepage ridge 9 extends along the radial direction of the shell 3 and is of a radial structure, the end parts of each creepage ridge 9, which are close to the center of the tapping box, are mutually connected into a whole, and the whole formed after the creepage ridges 9 are connected is of a continuous closed structure. Two adjacent creepage ridges 9 and a housing between the two creepage ridges 9 enclose a receiving cavity for receiving a corresponding single tap 7, and each tap 7 is correspondingly positioned in a respective relatively independent receiving cavity.
The tapping box further comprises a cover plate 6 arranged on the shell 3, four threaded holes are uniformly distributed on the end face of the shell 3 along the circumferential direction of the end face, and the cover plate 6 is connected with the shell 3 through insulating screws. In this embodiment, the housing 3 is provided with an embedded screw sleeve 8, and an inner hole of the embedded screw sleeve 8 forms a threaded hole on the housing 3. The embedded screw sleeve 8 is made of insulating materials, the insulating screw and the embedded screw sleeve 8 are insulating parts, and the floating potential can be prevented from being formed at the embedded screw sleeve and the insulating screw, so that the insulating effect of a tapping area is ensured.
The insulating screw is sleeved with a sealing rubber cushion 4, and the sealing rubber cushion 4 is arranged between the cover plate 6 and the shell 3. When the cover plate 6 is connected with the shell 3 through the insulating screw, the cover plate 6 can generate warping due to stress concentration at the insulating screw, so that gaps are formed between the cover plate 6 and the shell 3, and the sealing performance between the cover plate and the shell can be enhanced by the sealing rubber gasket 4.
As shown in fig. 4, embodiment 2 of the tapping point structure of the dry-type transformer according to the present utility model is different from embodiment 1 in that: in embodiment 1, the ends of the creeper banks near the center of the tapping box are directly connected to form a whole, and in this embodiment, annular insulation protrusions may also be disposed at the center of the tapping box, and the ends of the creeper banks near the center of the tapping box are respectively connected to the annular insulation protrusions to form a whole.
Example 3 of the dry-type transformer tap configuration of the present utility model differs from example 1 in that: in the embodiment 1, the threaded hole on the housing is formed by the inner hole of the embedded screw sleeve, and in the embodiment, the threaded hole may also be directly machined on the housing.
Example 4 of the dry-type transformer tap configuration of the present utility model differs from example 1 in that: in embodiment 1, the high-voltage terminal and the tapping box are disposed on opposite sides of the coil, and in this embodiment, the high-voltage terminal and the tapping box may be disposed on the same side of the coil.
Claims (3)
1. The utility model provides a dry-type transformer tapping zone structure, includes the coil and sets up the tapping box of coil, the tapping box includes the casing and sets up the tap in the casing, and the tap is annular distribution, is equipped with creepage ridge, its characterized in that between two adjacent taps: the end parts of each creepage ridge, which are close to the center of the tapping box, are mutually connected into a whole so that each tap is in a respective relatively independent accommodating cavity, a cover plate is arranged on a shell of the tapping box, a sealing rubber pad made of insulating materials is arranged between the cover plate and the shell, the tapping region structure of the dry-type transformer further comprises two high-voltage wiring columns which are arranged at intervals along the axial direction of the coil, one of the high-voltage wiring columns is a head wiring column, the other high-voltage wiring column is a tail wiring column, and the high-voltage wiring columns and the tapping box are arranged on two opposite sides of the coil.
2. The dry-type transformer tap changer of claim 1, wherein: the shell is provided with a threaded hole, the shell is connected with the cover plate through an insulating screw, and the sealing rubber pad is sleeved on the insulating screw.
3. The dry-type transformer tap changer of claim 2, wherein: the shell is provided with an embedded screw sleeve, the threaded hole is formed by an inner hole of the embedded screw sleeve, and the embedded screw sleeve is made of insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810569598.4A CN108831720B (en) | 2018-06-05 | 2018-06-05 | Tapping area structure of dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810569598.4A CN108831720B (en) | 2018-06-05 | 2018-06-05 | Tapping area structure of dry-type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108831720A CN108831720A (en) | 2018-11-16 |
| CN108831720B true CN108831720B (en) | 2023-11-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810569598.4A Active CN108831720B (en) | 2018-06-05 | 2018-06-05 | Tapping area structure of dry-type transformer |
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| Country | Link |
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| CN (1) | CN108831720B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116487168B (en) * | 2023-06-27 | 2023-11-21 | 广东明阳电气股份有限公司 | Sliding tap switch and transformer for offshore wind power |
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|---|---|---|---|---|
| CH202629A (en) * | 1937-04-21 | 1939-01-31 | Koch & Sterzel Ag | High voltage transformer, especially dry voltage converter. |
| US4068115A (en) * | 1974-05-09 | 1978-01-10 | Sweetheart Plastics, Inc. | Food serving tray |
| US4509033A (en) * | 1982-05-12 | 1985-04-02 | Robert Bosch Gmbh | Ignition coil construction for engine ignition system |
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2018
- 2018-06-05 CN CN201810569598.4A patent/CN108831720B/en active Active
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| CN207021116U (en) * | 2017-05-31 | 2018-02-16 | 无锡亿能电力设备股份有限公司 | A kind of Cast Resin Dry-Type Transformer |
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| Publication number | Publication date |
|---|---|
| CN108831720A (en) | 2018-11-16 |
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