CN113226003A - Material system of radio frequency shielding layer for MRI shielding room - Google Patents
Material system of radio frequency shielding layer for MRI shielding room Download PDFInfo
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- CN113226003A CN113226003A CN202110332470.8A CN202110332470A CN113226003A CN 113226003 A CN113226003 A CN 113226003A CN 202110332470 A CN202110332470 A CN 202110332470A CN 113226003 A CN113226003 A CN 113226003A
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- shielding layer
- aluminum
- radio frequency
- frame
- shielding
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- 239000000463 material Substances 0.000 title claims abstract description 80
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 69
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 239000011888 foil Substances 0.000 claims abstract description 19
- 239000003292 glue Substances 0.000 claims abstract description 16
- 239000002023 wood Substances 0.000 claims description 16
- 239000011120 plywood Substances 0.000 claims description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 239000002390 adhesive tape Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 17
- 239000011889 copper foil Substances 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000002595 magnetic resonance imaging Methods 0.000 description 24
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 229910001335 Galvanized steel Inorganic materials 0.000 description 8
- 239000008397 galvanized steel Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical group [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
-
- 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
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
-
- 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
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
A material system for a radio frequency shielding layer of an MRI shielded room, comprising: the aluminum shielding layer comprises an aluminum shielding layer material (2), a frame or substrate (1), a fastener (3), a conductive gasket and glue; the fastener (3) electrically connects the aluminum shielding layer material (2) and the frame or the substrate (1) to form a Faraday cage shielding room with six surfaces, namely a wall, a ceiling and a floor. The aluminum foil shielding layer material system has the advantages and bright spots of light weight, excellent toughness, difficult oxidation, excellent manufacturability, long service life, excellent cost performance, environmental protection and the like, and is exactly what the copper foil shielding layer material system does not have.
Description
Technical Field
The invention relates to the field of medical treatment and radio frequency shielding, in particular to a radio frequency shielding layer material system for an MRI shielding room, which can create the MRI shielding room with wide frequency band, long service life, no maintenance and high cost performance and has popularization and application values.
Background
1. The radio frequency shielding layer is almost any metal; however, the most predominant metals used for MRI shielding are copper, galvanized steel, and aluminum. Other metals are not commonly used due to other weak points, such as high price, difficult handling, and easy corrosion.
2. At present, the shielding layer material systems of the MRI radio frequency shielding room have the following types:
the first radio frequency shielding layer material system is formed by wrapping copper foils of wood frames or plastic frames, connecting the copper foils by bolts to form walls and ceilings, and soldering the terraces by the copper foils. The system has light weight, is convenient for modification on site and has long service life.
And the second radio frequency shielding layer material system is formed by wrapping a groove-shaped aluminum alloy frame copper foil, connecting the copper foil by using a flange bolt, and obtaining an invention patent in 2017, 10 months and 10 days. At present, the wooden frame becomes the first choice of customers, and is in a rejected state.
The third radio frequency shielding layer material system is formed by laminating galvanized steel plates on both sides of a plywood to form a sandwich structure, and the system is heavier. Can be modified in the field, but is more energy intensive, and some MRI systems are not recommended because the clamping system is ferrous.
The fourth radio frequency shielding layer material system, which is a disk type shielding layer, is made of heavy metal entirely, does not use wood, is connected by bolts, and the main metal material is galvanized steel, and the system is heavy and cannot be modified on site.
The fifth radio frequency shielding layer material system is a corrugated plate layer made of galvanized steel, aluminum or copper. The corrugated plate is machined by a special press forming machine, at present, the galvanized steel corrugated plate is widely used in an electric high-voltage test hall, and the system can be used in an MRI (magnetic resonance imaging) shielding room to replace a disc type shielding layer system. The invention relates to a Chinese patent technology for forming walls, ceilings and floors by bolts or welding.
3. As radio frequency shielding layer materials, most copper is used, and the second is galvanized steel, but aluminum and not
Very little steel is available.
4. At present, copper is the most commonly used material for MRI radio frequency shielding layers, most of which are dielectric copper foils, and has the defects and disadvantages of poor toughness, large brittleness, easy cracking and breakage, easy oxidation, easy generation of galvanic couple corrosion, large specific gravity, short service life, high price, high manufacturing cost, high maintenance cost and the like.
Disclosure of Invention
The invention aims to provide an aluminum shielding layer material system for an MRI radio frequency shielding room, overcomes various defects and shortcomings of the existing copper shielding layer material system, and provides a new generation of MRI shielding room (machine room) which has wide frequency band, high quality, long service life, no maintenance and high cost performance.
In order to achieve the purpose, the invention provides the following specific technical scheme:
a material system for a radio frequency shielding layer of an MRI shielded room, comprising: aluminum shielding layer material 2, frame or base plate 1, fastener 3, conductive gasket, glue; the fastener 3 electrically connects the aluminum shielding layer material 2 and the frame or the base plate 1 to form a Faraday cage shielding room with six surfaces, namely a wall, a ceiling and a floor.
The aluminum shielding layer material 2 may be an aluminum foil or an aluminum plate.
The frame or substrate 1 may be an aluminum alloy frame, a wood frame or a plastic frame.
The aluminum shielding layer material 2 is wrapped on the outer surface of the aluminum shielding layer material to form a shielding module; or the plywood substrate and the aluminum foil compound layer are arranged on two sides of the plywood to form the sandwich shielding module.
The fastener 3 comprises a flange bolt 31 and a gasket 34; or a flange nut 32 and a washer 34; or a wood screw 33.
The glue can be glue or adhesive tape and is used for combining and fixing the aluminum shielding layer material 2 and the frame or the substrate 1.
Whether the conductive pad is provided or not depends on the index.
The invention has the beneficial effects that:
the invention fully embodies the advantages of novelty, novelty and practicability.
1. The aluminum foil shielding layer material system has the advantages and bright spots of light weight, excellent toughness, difficult oxidation, excellent manufacturability, long service life, excellent cost performance, environmental protection and the like, and is exactly what the copper foil shielding layer material system does not have.
2. The aluminum foil shielding layer material system is not only suitable for the shielding room of low-field strength MRI equipment, but also suitable for the shielding room of high-field strength MRI equipment. Within the frequency range of 10 MHZ-410 MHZ, the radio frequency attenuation is more than or equal to 100dB, thus completely meeting different requirements of various MRI equipment manufacturers.
3. The performance cost ratio is extremely excellent and is novel, and more value is created for customers.
Aluminum foil radio frequency shielding layer material system: specific gravity of aluminum material: 2.7, the specific weight of the copper material is 8.5, the difference between the specific weight of the copper material and the specific weight of the copper material is 5.8, and the cost is reduced by more than or equal to 85 percent; service life: long time, can realize maintenance-free promise!
The MRI shielding room with high quality and high cost performance is more conducive to improving the diagnosis quality and the diagnosis efficiency and more conducive to popularization and application, and is popular for people!
4. The aluminum shielding layer material fully utilizes rich aluminum resources in China, is recyclable resource, and better meets the requirements of national policy compared with copper resources.
5. High field 3.0T-9.4 TMRI device, meaning that imaging is clearer, scan time is shorter, or more patients examined during a work day!
The MRI shielding room with wide frequency band, high quality, long service life, maintenance-free and high cost performance creates greater use value for customers, and expands the dimension and depth of the creation value! Contribute a share of power to the development of a big health!
6. Aluminum foil radio frequency shielding layer material system for providing core competitiveness to MRI shielding room! Is more beneficial to Chinese enterprises to quickly occupy the medical shielding market in China and abroad and obtain multiple wins, and has great significance in popularization and application!
Drawings
FIG. 1 is a diagram of an aluminum frame RF shielding layer material system;
FIG. 2 is a diagram of a wood frame radio frequency shielding layer material system;
FIG. 3 is a system diagram of plywood substrate sandwich radio frequency shielding layer material;
in the figure, 1 is a frame or a substrate; 11 is a wooden frame; 12 is a plywood; 2 is an aluminum shielding layer material; 21 is aluminum foil; 22 is galvanized steel; 3 is a fastener; 31 is a bolt with a flange; 32 is a flanged nut; 33 is a wood screw; 34 is a gasket; 35 is a flat pressing strip; 36 is
And molding and pressing strips.
Detailed Description
The present invention is described in detail below with reference to the drawings and examples, but the present invention is not limited thereto.
Example 1
As a possible implementation, one material system for the radio frequency shielding layer of the MRI shielding room may be an aluminum frame aluminum foil radio frequency shielding layer material system.
A material system for a radio frequency shielding layer of an MRI shielded room, comprising: aluminum shielding layer material 2, frame or base plate 1, fastener 3, conductive gasket, glue; the fastener 3 electrically connects the aluminum shielding layer material 2 and the frame or the base plate 1 to form a Faraday cage shielding room with six surfaces, namely a wall, a ceiling and a floor.
The aluminum shielding layer material 2 may be an aluminum foil or an aluminum plate.
The frame or substrate 1 may be an aluminum alloy frame, a wood frame or a plastic frame.
The aluminum shielding layer material 2 is wrapped on the outer surface of the aluminum shielding layer material to form a shielding module; or the plywood substrate and the aluminum foil compound layer are arranged on two sides of the plywood to form the sandwich shielding module.
The fastener 3 comprises a flange bolt 31 and a gasket 34; or a flange nut 32 and a washer 34; or a wood screw 33.
The glue can be glue or adhesive tape and is used for combining and fixing the aluminum shielding layer material 2 and the frame or the substrate 1.
Whether the conductive pad is provided or not depends on the index.
Example 2
As a possible embodiment, one material system for the radio frequency shielding layer of the MRI shielding room may be a wood frame aluminum foil radio frequency shielding layer material system.
A material system for a radio frequency shielding layer of an MRI shielded room, comprising: aluminum shielding layer material 2, frame or base plate 1, fastener 3, conductive gasket, glue; the fastener 3 electrically connects the aluminum shielding layer material 2 and the frame or the base plate 1 to form a Faraday cage shielding room with six surfaces, namely a wall, a ceiling and a floor.
The aluminum shielding layer material 2 may be an aluminum foil or an aluminum plate.
The frame or substrate 1 may be an aluminum alloy frame, a wood frame or a plastic frame.
The aluminum shielding layer material 2 is wrapped on the outer surface of the aluminum shielding layer material to form a shielding module; or the plywood substrate and the aluminum foil compound layer are arranged on two sides of the plywood to form the sandwich shielding module.
The fastener 3 comprises a flange bolt 31 and a gasket 34; or a flange nut 32 and a washer 34; or a wood screw 33.
The glue can be glue or adhesive tape and is used for combining and fixing the aluminum shielding layer material 2 and the frame or the substrate 1.
Whether or not the conductive pad is provided, depending on the specification
The frame or the substrate 1 is a wooden frame 11, the aluminum shielding layer material 2 is an aluminum foil 21, and the fastening piece 3 is a wood screw 33.
Example 3
As a possible implementation, one material system for the radio frequency shielding layer of the MRI shielding room may be a plywood-based substrate sandwich radio frequency shielding layer material system.
A material system for a radio frequency shielding layer of an MRI shielded room, comprising: aluminum shielding layer material 2, frame or base plate 1, fastener 3, conductive gasket, glue; the fastener 3 electrically connects the aluminum shielding layer material 2 and the frame or the base plate 1 to form a Faraday cage shielding room with six surfaces, namely a wall, a ceiling and a floor.
The aluminum shielding layer material 2 may be an aluminum foil or an aluminum plate.
The frame or substrate 1 may be an aluminum alloy frame, a wood frame or a plastic frame.
The aluminum shielding layer material 2 is wrapped on the outer surface of the aluminum shielding layer material to form a shielding module; or the plywood substrate and the aluminum foil compound layer are arranged on two sides of the plywood to form the sandwich shielding module.
The fastener 3 comprises a flange bolt 31 and a gasket 34; or a flange nut 32 and a washer 34; or a wood screw 33.
The glue can be glue or adhesive tape and is used for combining and fixing the aluminum shielding layer material 2 and the frame or the substrate 1.
Whether the conductive pad is provided or not depends on the index.
The frame or the base plate 1 is made of plywood 12, the aluminum shielding layer material 2 is made of galvanized steel 22, and the fastening piece 3 is made of flanged bolts 31,
The molding beads 36 and the flat beads 35.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A material system for a radio frequency shielding layer of an MRI shielded room, comprising: the aluminum shielding layer comprises an aluminum shielding layer material (2), a frame or substrate (1), a fastener (3), a conductive gasket and glue; the fastener (3) electrically connects the aluminum shielding layer material (2) and the frame or the substrate (1) to form a Faraday cage shielding room with six surfaces, namely a wall, a ceiling and a floor.
2. The material system of the radio frequency shielding layer for the MRI shielding room as set forth in claim 1, wherein the aluminum shielding layer material (2) can be aluminum foil or aluminum plate.
3. The material system for radio frequency shielding layer of MRI shielding room according to claim 1, characterized in that the frame or substrate (1) may be an aluminum alloy frame, a wood frame or a plastic frame.
4. The material system of the radio frequency shielding layer for the MRI shielding room as set forth in claim 1, wherein the aluminum shielding layer material (2) is wrapped on the outer surface thereof to constitute a shielding module; or the plywood substrate and the aluminum foil compound layer are arranged on two sides of the plywood to form the sandwich shielding module.
5. The material system for a radio frequency shielding layer of an MRI shielded room according to claim 1, characterized in that the fastener (3) comprises a flange bolt (31) and a washer (34); or a flange nut (32) and a washer (34); or a wood screw (33).
6. The material system for radio frequency shielding layer of MRI shielding room as set forth in claim 1, characterized in that said glue can be glue or adhesive tape for bonding fixation of said aluminum shielding layer material (2) with said frame or substrate (1).
7. The material system for a radio frequency shielding layer of an MRI shielded room of claim 1 wherein the conductive liner is provided or not, depending on the criteria.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110332470.8A CN113226003A (en) | 2021-03-29 | 2021-03-29 | Material system of radio frequency shielding layer for MRI shielding room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110332470.8A CN113226003A (en) | 2021-03-29 | 2021-03-29 | Material system of radio frequency shielding layer for MRI shielding room |
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| Publication Number | Publication Date |
|---|---|
| CN113226003A true CN113226003A (en) | 2021-08-06 |
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| CN202110332470.8A Pending CN113226003A (en) | 2021-03-29 | 2021-03-29 | Material system of radio frequency shielding layer for MRI shielding room |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02209542A (en) * | 1989-02-06 | 1990-08-21 | Riken Corp | Electromagnetic shield panel and fixing method thereof |
| JP2008255617A (en) * | 2007-04-03 | 2008-10-23 | Kajima Corp | Electromagnetic shield room |
| CN106121037A (en) * | 2016-08-15 | 2016-11-16 | 李志珍 | A kind of trough aluminium alloy framework for MRI radio-frequency shield room |
| CN108265925A (en) * | 2018-03-27 | 2018-07-10 | 李志珍 | A kind of multifunctional integrated plate of high-performance for electromagnetic shielding chamber |
| CN110629926A (en) * | 2019-08-15 | 2019-12-31 | 李志珍 | High-performance multifunctional integrated plate for MRI (magnetic resonance imaging) shielding room |
| CN215500317U (en) * | 2021-03-29 | 2022-01-11 | 李志珍 | Material system of radio frequency shielding layer for MRI shielding room |
-
2021
- 2021-03-29 CN CN202110332470.8A patent/CN113226003A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02209542A (en) * | 1989-02-06 | 1990-08-21 | Riken Corp | Electromagnetic shield panel and fixing method thereof |
| JP2008255617A (en) * | 2007-04-03 | 2008-10-23 | Kajima Corp | Electromagnetic shield room |
| CN106121037A (en) * | 2016-08-15 | 2016-11-16 | 李志珍 | A kind of trough aluminium alloy framework for MRI radio-frequency shield room |
| CN108265925A (en) * | 2018-03-27 | 2018-07-10 | 李志珍 | A kind of multifunctional integrated plate of high-performance for electromagnetic shielding chamber |
| CN110629926A (en) * | 2019-08-15 | 2019-12-31 | 李志珍 | High-performance multifunctional integrated plate for MRI (magnetic resonance imaging) shielding room |
| CN215500317U (en) * | 2021-03-29 | 2022-01-11 | 李志珍 | Material system of radio frequency shielding layer for MRI shielding room |
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Application publication date: 20210806 |
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