CN110601111A - Take wall bushing of magnetic shield - Google Patents
Take wall bushing of magnetic shield Download PDFInfo
- Publication number
- CN110601111A CN110601111A CN201911058963.6A CN201911058963A CN110601111A CN 110601111 A CN110601111 A CN 110601111A CN 201911058963 A CN201911058963 A CN 201911058963A CN 110601111 A CN110601111 A CN 110601111A
- Authority
- CN
- China
- Prior art keywords
- shielding layer
- bushing
- wall bushing
- layer
- magnetic
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0018—Casings with provisions to reduce aperture leakages in walls, e.g. terminals, connectors, cables
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0071—Active shielding
Abstract
The invention discloses a wall bushing with magnetic shielding, which comprises a bushing body and a mounting nut insert, wherein a bus bar inlet and outlet hole is formed in a bushing nut. The inside internal shield layer that is used for female the arranging to connect that is equipped with of sleeve pipe body, the inside external shield layer who is connected with the mounting nut inserts that is equipped with in addition of sleeve pipe body, the internal shield layer of sleeve pipe body inside is equipped with well shielding layer, especially well shielding layer with the external shield layer centre, can play the electromagnetic field shielding effect. The inner shielding layer, the outer shielding layer and the middle shielding layer are all manufactured by casting, or wrapping or coating magnetic shielding materials, so that the electromagnetic field is shielded. The invention has the advantage of avoiding the heating or vibration of the wall bushing caused by the larger eddy effect of the metal plate at the mounting position of the wall bushing.
Description
Technical Field
The invention relates to the field of novel sleeves, in particular to a wall bushing with a magnetic shield.
Background
Magnetic shielding is a universal security technology for many precision measurement sciences, and has wide application in extreme measurement environments such as high-precision atomic clocks, electron beam imaging devices, gyroscopes, mass spectrometers, and neutron detection. In these application environments, the weak geomagnetic field must be suppressed as much as possible, and the geomagnetic field is usually suppressed by 3 to 6 orders of magnitude.
The magnetic shielding effectiveness is mainly related to the conductivity and permeability of the magnetic shielding material. Generally, the higher the conductivity and permeability, the better the performance. According to the law of magnetic induction refraction: the magnetic induction line deviation method is used from a medium with low magnetic permeability to a medium with high magnetic permeability, and the magnetic induction line is deviated to the normal line from a medium with high magnetic permeability to a medium with low magnetic permeability. Therefore, the magnetic shielding cover made of permalloy with high magnetic permeability is selected and placed in a magnetic field, and as the magnetic permeability of the magnetic shielding cover far exceeds the vacuum magnetic permeability and the magnetic resistance is far smaller than the air magnetic resistance, most magnetic induction lines pass through the wall of the magnetic shielding cover, and the magnetic induction lines in the cavity are few, so that the purpose of magnetic shielding is achieved.
At present, the wall bushing in the market comprises a bushing body and an installation nut insert, and the bushing body is internally provided with a busbar access hole. When the wall bushing is in live-line operation, the metal plate at the installation position of the wall bushing can generate eddy effect, and the wall bushing can generate heat or vibrate when the eddy effect is large, so that the service life of the bushing is influenced, and even the safe and stable operation of a power grid can be influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a wall bushing with a magnetic shield, which comprises a bushing body (1), a busbar access hole (2), an inner shielding layer (3), an outer shielding layer (4) and a middle shielding layer (5), wherein the busbar access hole (2) is arranged in a bushing nut, and the wall bushing is characterized in that: the wall bushing body is internally provided with an inner shielding layer (3), an outer shielding layer (4) and an intermediate shielding layer (5), the inner shielding layer (3) is connected with the bushing body (1) through an internal bus bar, the outer shielding layer (4) is connected with the bushing body (1) through an internal mounting nut insert, and the intermediate shielding layer (5) is arranged between the inner shielding layer and the outer shielding layer in the bushing body.
Furthermore, the inner shielding layer (3), the outer shielding layer (4) and the middle shielding layer (5) are all manufactured by casting, or wrapping or coating magnetic shielding materials.
Further, the magnetic shielding material is made of a flexible shielding material.
Further, the inside internal shield layer (3) that is used for female the arranging to connect that is equipped with of sleeve pipe body (1), the inside external shield layer (4) that is connected with the installation nut inserts that is equipped with in addition of sleeve pipe body (1), the inside internal shield layer of sleeve pipe body and external shield layer centre are equipped with well shielding layer.
The beneficial effect of this application: the wall bushing with the magnetic shield has the advantages that the wall bushing can be prevented from heating or vibrating due to the fact that a metal plate at the installation position of the wall bushing generates a large eddy effect; when the wall bushing is in live-line operation, the eddy current effect can appear on the metal plate at the installation position of the wall bushing, and the wall bushing can be heated or vibrated when the eddy current effect is large, so that the service life of the bushing is influenced, and even the safe and stable operation of a power grid can be influenced.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic view of the overall structure of a wall bushing with magnetic shielding according to the present application.
1. A sleeve body; 2. a busbar access hole; 3. an inner shield layer; 4. an outer shield layer; 5. and a middle shielding layer.
Detailed Description
Referring to fig. 1, it is a schematic view of the overall structure of a wall bushing with magnetic shielding according to the present application;
can know by figure 1, this application embodiment provides a wall bushing of taking magnetic shield, include sleeve pipe body (1) and female arranging business turn over hole (2), internal shield layer (3), external shield layer (4), well shielding layer (5) and constitute, female arranging business turn over hole (2) and set up in bushing nut, its characterized in that: the wall bushing body is internally provided with an inner shielding layer (3), an outer shielding layer (4) and an intermediate shielding layer (5), the inner shielding layer (3) is connected with the bushing body (1) through an internal bus bar, the outer shielding layer (4) is connected with the bushing body (1) through an internal mounting nut insert, and the intermediate shielding layer (5) is arranged between the inner shielding layer and the outer shielding layer in the bushing body.
Furthermore, the inner shielding layer (3), the outer shielding layer (4) and the middle shielding layer (5) are all manufactured by casting, or wrapping or coating magnetic shielding materials.
Further, the magnetic shielding material is made of a flexible shielding material.
Further, the inside internal shield layer (3) that is used for female the arranging to connect that is equipped with of sleeve pipe body (1), the inside external shield layer (4) that is connected with the installation nut inserts that is equipped with in addition of sleeve pipe body (1), the inside internal shield layer of sleeve pipe body and external shield layer centre are equipped with well shielding layer.
The wall bushing with the magnetic shield has the advantages that the wall bushing can be prevented from heating or vibrating due to the fact that a metal plate at the installation position of the wall bushing generates a large eddy effect; when the wall bushing is in live-line operation, the eddy current effect can appear on the metal plate at the installation position of the wall bushing, and the wall bushing can be heated or vibrated when the eddy current effect is large, so that the service life of the bushing is influenced, and even the safe and stable operation of a power grid can be influenced.
Example (b):
the application the wall bushing by sleeve pipe body (1), female arranging business turn over hole (2), internal shield layer (3), outer shielding layer (4), well shielding layer (5). The device can avoid the metal plate at the mounting position of the wall bushing from generating heat or vibrating due to the larger eddy effect.
The inner shielding layer (3) used for being connected with the busbar is arranged inside the sleeve body (1), the outer shielding layer (4) connected with the mounting nut insert is arranged inside the sleeve body (1), and a middle shielding layer, especially a middle shielding layer, is arranged between the inner shielding layer inside the sleeve body and the outer shielding layer and can play a role in shielding an electromagnetic field.
The inner shielding layer (3), the outer shielding layer (4) and the middle shielding layer (5) are all manufactured by casting, or wrapping, or coating magnetic shielding materials.
The wall bushing with the magnetic shield has the advantages that the wall bushing can be prevented from heating or vibrating due to the fact that a metal plate at the installation position of the wall bushing generates a large eddy effect; when the wall bushing is in live-line operation, the eddy current effect can appear on the metal plate at the installation position of the wall bushing, and the wall bushing can be heated or vibrated when the eddy current effect is large, so that the service life of the bushing is influenced, and even the safe and stable operation of a power grid can be influenced.
Example (b):
the application the wall bushing by sleeve pipe body (1), female arranging business turn over hole (2), internal shield layer (3), outer shielding layer (4), well shielding layer (5). The device can avoid the metal plate at the mounting position of the wall bushing from generating heat or vibrating due to the larger eddy effect.
The inner shielding layer (3) used for being connected with the busbar is arranged inside the sleeve body (1), the outer shielding layer (4) connected with the mounting nut insert is arranged inside the sleeve body (1), and a middle shielding layer, especially a middle shielding layer, is arranged between the inner shielding layer inside the sleeve body and the outer shielding layer and can play a role in shielding an electromagnetic field.
The inner shielding layer (3), the outer shielding layer (4) and the middle shielding layer (5) are all manufactured by casting, or wrapping, or coating magnetic shielding materials.
The wall bushing with the magnetic shield has the advantages that the wall bushing can be prevented from heating or vibrating due to the fact that a metal plate at the installation position of the wall bushing generates a large eddy effect; when the wall bushing is in live-line operation, the eddy current effect can appear on the metal plate at the installation position of the wall bushing, and the wall bushing can be heated or vibrated when the eddy current effect is large, so that the service life of the bushing is influenced, and even the safe and stable operation of a power grid can be influenced.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (4)
1. The utility model provides a take wall bushing of magnetic shield which characterized in that, includes that sleeve pipe body (1) and female arranging business turn over hole (2), internal shield layer (3), external shield layer (4), well shielding layer (5) are constituteed, female arranging business turn over hole (2) and set up in sleeve nut, its characterized in that: the wall bushing body is internally provided with an inner shielding layer (3), an outer shielding layer (4) and an intermediate shielding layer (5), the inner shielding layer (3) is connected with the bushing body (1) through an internal bus bar, the outer shielding layer (4) is connected with the bushing body (1) through an internal mounting nut insert, and the intermediate shielding layer (5) is arranged between the inner shielding layer and the outer shielding layer in the bushing body.
2. The wall bushing with magnetic shielding according to claim 1, wherein the inner shielding layer (3), the outer shielding layer (4), and the middle shielding layer (5) are made by casting, or wrapping, or coating magnetic shielding material.
3. A wall bushing with magnetic shield as claimed in claim 2, wherein said magnetic shield material is a flexible shield material.
4. The wall bushing with the magnetic shielding function according to claim 1, wherein an inner shielding layer (3) for bus bar connection is arranged inside the bushing body (1), an outer shielding layer (4) connected with the mounting nut insert is additionally arranged inside the bushing body (1), and a middle shielding layer is arranged between the inner shielding layer and the outer shielding layer inside the bushing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911058963.6A CN110601111A (en) | 2019-11-01 | 2019-11-01 | Take wall bushing of magnetic shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911058963.6A CN110601111A (en) | 2019-11-01 | 2019-11-01 | Take wall bushing of magnetic shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110601111A true CN110601111A (en) | 2019-12-20 |
Family
ID=68852181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911058963.6A Pending CN110601111A (en) | 2019-11-01 | 2019-11-01 | Take wall bushing of magnetic shield |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110601111A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07336085A (en) * | 1994-06-03 | 1995-12-22 | Sumitomo Electric Ind Ltd | Enclosure-through part, of cable, provided with metal shielding layer |
| CN201393028Y (en) * | 2009-03-30 | 2010-01-27 | 杭州曙光电器有限公司 | Shielding high pressure through-wall sleeve |
| CN201774204U (en) * | 2010-08-20 | 2011-03-23 | 中国西电电气股份有限公司 | Wall feed-through sleeve of soft supporting bus for high voltage switching equipment |
| CN104471651A (en) * | 2012-07-19 | 2015-03-25 | 矢崎总业株式会社 | Wire harness |
| CN205355729U (en) * | 2016-01-27 | 2016-06-29 | 云南电网有限责任公司电力科学研究院 | Wall bushing with shielding structure |
| CN207265590U (en) * | 2017-09-27 | 2018-04-20 | 许继集团有限公司 | Wall bushing and the switchgear using the wall bushing |
-
2019
- 2019-11-01 CN CN201911058963.6A patent/CN110601111A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07336085A (en) * | 1994-06-03 | 1995-12-22 | Sumitomo Electric Ind Ltd | Enclosure-through part, of cable, provided with metal shielding layer |
| CN201393028Y (en) * | 2009-03-30 | 2010-01-27 | 杭州曙光电器有限公司 | Shielding high pressure through-wall sleeve |
| CN201774204U (en) * | 2010-08-20 | 2011-03-23 | 中国西电电气股份有限公司 | Wall feed-through sleeve of soft supporting bus for high voltage switching equipment |
| CN104471651A (en) * | 2012-07-19 | 2015-03-25 | 矢崎总业株式会社 | Wire harness |
| CN205355729U (en) * | 2016-01-27 | 2016-06-29 | 云南电网有限责任公司电力科学研究院 | Wall bushing with shielding structure |
| CN207265590U (en) * | 2017-09-27 | 2018-04-20 | 许继集团有限公司 | Wall bushing and the switchgear using the wall bushing |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
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Application publication date: 20191220 |