CN106121037A - A kind of trough aluminium alloy framework for MRI radio-frequency shield room - Google Patents
A kind of trough aluminium alloy framework for MRI radio-frequency shield room Download PDFInfo
- Publication number
- CN106121037A CN106121037A CN201610669962.5A CN201610669962A CN106121037A CN 106121037 A CN106121037 A CN 106121037A CN 201610669962 A CN201610669962 A CN 201610669962A CN 106121037 A CN106121037 A CN 106121037A
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- China
- Prior art keywords
- aluminium alloy
- draconis
- trough
- trough aluminium
- alloy framework
- 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.)
- Granted
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 95
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- 239000010949 copper Substances 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 19
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 239000004411 aluminium Substances 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 206010003645 Atopy Diseases 0.000 abstract description 2
- 230000008859 change Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 11
- 238000013461 design Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
-
- 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
- H05K9/0001—Rooms or chambers
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
A kind of trough aluminium alloy framework for MRI radio-frequency shield room, it is characterized in that including that several mutually shield the trough aluminium alloy framework screen unit being connected as a general frame structure, described each trough aluminium alloy framework screen unit includes trough aluminium alloy Os Draconis (1) and aluminium alloy decorative Os Draconis (2), trough aluminium alloy Os Draconis (1) constitute the frame of trough aluminium alloy framework screen unit, and aluminium alloy decorative Os Draconis (2) connect the trough aluminium alloy Os Draconis (1) that 2 limits are relative.The trough aluminium alloy framework for MRI radio-frequency shield room of the present invention is the important component part of new generation of green MRI radio-frequency shield room, has fully demonstrated the characteristics such as green, environmental protection, low-carbon (LC).Show its atopic change especially, advanced the most notable with economy, belong to pioneering inside and outside the world.The beginning is opened for the aluminium section bar application in medical treatment shielding field.
Description
Technical field
The present invention relates to field of medical technology, a kind of trough aluminium alloy framework for MRI radio-frequency shield room.
Background technology
Up to now, domestic and international all of NMR (Nuclear Magnetic Resonance)-imaging (MRI) radio-frequency shield room, all use flitch composition dragon
Bone, has plenty of outside the flitch Os Draconis being prefabricated in the factory and answers copper material, is combined into shroud module and carries out long spiro nail assembly;But great majority are
Flitch is fixed by scene with building, is then attached to again on rough ground by copper material, uses artificial Welding will overlap between copper material
Weldering even, even forms a complete radio-frequency shield room with top, the weldering of ground copper material.
Above-mentioned MRI screened room, all uses flitches to do Os Draconis, also exists and designs the most advanced, unreasonable, technique backwardness, no
Meet the requirement of green, low-carbon (LC), environmental protection.Meanwhile, timber resources is the abundantest, and processing technique is complicated, and deformation of expanding with heat and contract with cold causes
Shield effectiveness is unstable.
For the flitch Os Draconis of MRI radio-frequency shield room, design requirement should use the timber of high-quality to be processed into required flitch,
But a flitch long for more than 3m, certainly will exist wood and scab, during growth, the diversity of its density is the biggest, is not inconsistent
Close the requirement (rough ground is compressible) that the rigidity of screened room Os Draconis is consistent;Its fire protecting performance extreme difference (combustible material) need into
Row fire prevention, anticorrosion, mildew-resistant, mothproof etc. process, be not suitable for medical radio-frequency screened room, furthermore the weight of rough ground is much larger than aluminum conjunction
Metal type material Os Draconis.There is problems of a lot in a word.
Summary of the invention
It is an object of the invention to provide a kind of trough aluminium alloy framework for MRI radio-frequency shield room, overcome Traditional Wood
Many drawbacks of matter structure.
The technical scheme is that
A kind of trough aluminium alloy framework for MRI radio-frequency shield room, mutually shields including several and is connected as an entirety
The trough aluminium alloy framework screen unit of frame structure, described each trough aluminium alloy framework screen unit includes trough aluminium alloy
Os Draconis (1) and aluminium alloy decorative Os Draconis (2), trough aluminium alloy Os Draconis (1) constitute the frame of trough aluminium alloy framework screen unit,
Aluminium alloy decorative Os Draconis (2) connect the trough aluminium alloy Os Draconis (1) that 2 limits are relative.
Being folded with copper shield sheet (3) between adjacent described trough aluminium alloy framework screen unit, copper shield sheet (3) is folded in
Between adjacent trough aluminium alloy Os Draconis (1), copper shield sheet (3) is corner-shape structure, between adjacent trough aluminium alloy Os Draconis (1)
Connected by nut (4), pad (5) and screw (6).
Adjacent described trough aluminium alloy framework screen unit, by connecting without the shielding of magnetic screw constant moment of force, is combined into metope screen
Cover layer, top shield layer, and be connected with the shielding of ground screen layer respectively, be combined into a faraday cup.
Described trough aluminium alloy Os Draconis (1) generally grooved, 2 edges, limit of its grooved are provided with fillet (10), bottom grooved
Outside is provided with plane groove (11), the first triangular groove (12) and the second triangular groove (13).
Described aluminium alloy decorative Os Draconis (2) generally grooved, it is provided with the first vertical gear (20) and second and vertical keeps off (21), and first
The edge of vertical gear (20) and the second vertical gear (21) is respectively equipped with the first hook plate (23) and the second hook plate (22), aluminium alloy decorative Os Draconis
(2) being additionally provided with strengthening groove (24) on, the second vertical gear (21) is provided with decorative keel triangular groove (25).
Carbon dioxide welding is used between described trough aluminium alloy Os Draconis (1) and aluminium alloy decorative Os Draconis (2).
The present invention is the aluminium alloy grooved framework for new generation of green MRI radio shielding module, a kind of custom-designed
Aluminium alloy, uses carbon dioxide welding technique to form the smooth lightweight shielding frame of rigidity, and it answers copper-surfaced paper tinsel (or copper
Plate) form a radio shielding modular unit, multiple shroud module unit, by connecting without the shielding of magnetic screw constant moment of force, combine
Become metope, top shield layer, be connected with the shielding of ground screen layer, be combined into a faraday cup, namely new generation of green MRI is penetrated
Frequently screened room (machine room).
The invention has the beneficial effects as follows:
1, the trough aluminium alloy framework for MRI radio-frequency shield room of the present invention is new generation of green MRI radio-frequency shield room
Important component part, fully demonstrated the characteristics such as green, environmental protection, low-carbon (LC).Show its atopic change especially, advanced and economical
Property the most notable, belong to pioneering inside and outside the world!The beginning is opened for the aluminium section bar application in medical treatment shielding field!
2, the trough aluminium alloy Frame Design for MRI radio-frequency shield room of the present invention becomes special trough aluminium alloy frame
Frame, relatively other shape more meet the requirement of radio shielding seam, can directly clamp shielding copper material, after two aluminum grooved assemblings,
Synthesizing " H " type, its structural mechanical property is better than other shapes.
3, the present invention the trough aluminium alloy framework for MRI radio-frequency shield room there is special grooved aluminium chassis, its work
Make on face, to be designed to little groove (seeing accompanying drawing) and decrease contact area, it is achieved whole contacts in two strip faces, add list
The thrust that plane is long-pending, namely it is better protected from the leakage in gap, reach to ensure the optimum efficiency of shielding!(it is known that gap
Leak degree determine shield effectiveness)
4, the trough aluminium alloy framework for MRI radio-frequency shield room of the present invention need not lengthen strips of conductive between gap
Liner, the same shield effectiveness (>=100dB) ensureing it, meet the design requirement of radio-frequency shield room.Both economical convenient, save again
Set-up time, improve effect.
5, the trough aluminium alloy framework for MRI radio-frequency shield room of the present invention, takes full advantage of the aluminum money of China's abundant
Source, and be the resource of reproducible utilization, more conform to the demand of state basic policy than rare wooden resource, for high-performance, long-life
The development of radio-frequency shield room provide successful case.
6, the trough aluminium alloy framework for MRI radio-frequency shield room of the present invention, has obvious economic worth, practice card
Bright, than wood frame, totle drilling cost declines about 30%, this MRI market increased rapidly greatly and year by year for quantity, and beyond doubt one
Individual contribution!
7, the trough aluminium alloy Frame Design for MRI radio-frequency shield room of the present invention becomes large-size frame, a shielding
Room is up to 12 frameworks, and conventional design the most at least needs 38 frameworks, the realization of big frame design and craft, wood frame
Cannot realize, because the mechanical performance of wood materials, weight, machinability etc. is all to can not meet the design of big frame
Requirement.The shroud module of large-size frame, has saving material, saves artificial, quick and easy for installation, reduces gap leakage
Probability.Improve the advantages such as shield effectiveness.
8, the trough aluminium alloy framework for MRI radio-frequency shield room of the present invention, provides condition, aluminum for production line balance
The excellent characteristic of material, it is possible to achieve from the beginning of groove aluminum, terminal is processed into the stream of a qualified aluminium chassis copper shield modular unit
Waterline operation (includes blanking, corner cut, punching, welds, is coated with multiple operations such as Copper Foil, punching)
9, the shroud module unit of the trough aluminium alloy framework for MRI radio-frequency shield room of the present invention, the radio frequency of composition
Screened room, highlights its " new, excellent, fast, save, green " five big superioritys, is that the one of medical treatment shielding field invents greatly, demonstrates that invention is special
The exclusive attribute of profit!
Accompanying drawing explanation
Fig. 1 is the structural representation of the trough aluminium alloy framework screen unit of the present invention.
Fig. 2 is the side view of Fig. 1 of the present invention.
Fig. 3 is the structural representation of the trough aluminium alloy Os Draconis of the present invention.
Fig. 4 is the structural representation of the aluminium alloy decorative Os Draconis of the present invention.
Fig. 5 is the trough aluminium alloy framework shielding unit connection structure schematic diagram of the present invention.
In figure: 1 be trough aluminium alloy Os Draconis, 2 for aluminium alloy decorative Os Draconis, 3 for copper shield sheet, 4 for nut, 5 for pad,
6 it is screw, 10 is fillet, 11 is plane groove, 12 is the first triangular groove, 13 is the second triangular groove, 20 is first
Vertical gear, 21 be the second vertical gear, 22 be the second hook plate, 23 be the first hook plate, 24 be strengthening groove, 25 recessed for decorative keel triangle
Groove.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
Such as Fig. 1 to Fig. 5, a kind of trough aluminium alloy framework for MRI radio-frequency shield room, including several mutual companies of shielding
Connecing is the trough aluminium alloy framework screen unit of a general frame structure, and described each trough aluminium alloy framework screen unit includes
Trough aluminium alloy Os Draconis (1) and aluminium alloy decorative Os Draconis (2), trough aluminium alloy Os Draconis (1) constitute the shielding of trough aluminium alloy framework
The frame of unit, aluminium alloy decorative Os Draconis (2) connect the trough aluminium alloy Os Draconis (1) that 2 limits are relative.
Being folded with copper shield sheet (3) between adjacent described trough aluminium alloy framework screen unit, copper shield sheet (3) is folded in
Between adjacent trough aluminium alloy Os Draconis (1), copper shield sheet (3) is corner-shape structure, between adjacent trough aluminium alloy Os Draconis (1)
Connected by nut (4), pad (5) and screw (6).
Adjacent described trough aluminium alloy framework screen unit, by connecting without the shielding of magnetic screw constant moment of force, is combined into metope screen
Cover layer, top shield layer, and be connected with the shielding of ground screen layer respectively, be combined into a faraday cup.
Described trough aluminium alloy Os Draconis (1) generally grooved, 2 edges, limit of its grooved are provided with fillet (10), bottom grooved
Outside is provided with plane groove (11), the first triangular groove (12) and the second triangular groove (13).
Described aluminium alloy decorative Os Draconis (2) generally grooved, it is provided with the first vertical gear (20) and second and vertical keeps off (21), and first
The edge of vertical gear (20) and the second vertical gear (21) is respectively equipped with the first hook plate (23) and the second hook plate (22), aluminium alloy decorative Os Draconis
(2) being additionally provided with strengthening groove (24) on, the second vertical gear (21) is provided with decorative keel triangular groove (25).
Carbon dioxide welding is used between described trough aluminium alloy Os Draconis (1) and aluminium alloy decorative Os Draconis (2).The present invention is
For the aluminium alloy grooved framework of new generation of green MRI radio shielding module, a kind of custom-designed aluminium alloy, use titanium dioxide
Carbon welding procedure forms the smooth lightweight shielding frame of rigidity, and on it, copper-surfaced paper tinsel (or copper coin) forms a radio frequency screen again
Cover modular unit, multiple shroud module unit, by connecting without the shielding of magnetic screw constant moment of force, be combined into metope, top shield layer,
It is connected with the shielding of ground screen layer, is combined into a faraday cup, namely new generation of green MRI radio-frequency shield room (machine room).
The trough aluminium alloy framework of the present invention, is not only shielding Os Draconis, and has the function of decorative keel concurrently, both melt for
Integrally, unite two into one.
Trough aluminium alloy Os Draconis (1) its work surface is provided with plane groove (11), the first triangular groove (12) and second
Triangular groove (13) decreases contact area, it is achieved whole contacts in two strip faces, adds the thrust of unit are,
Such as Fig. 5, the present invention more meets the requirement of radio shielding seam compared with other shape, can directly clamp shielding copper material,
After two trough aluminium alloy Os Draconis (1) assemblings, synthesize " H " type.
Embodiment described above is only to be described the preferred embodiment of the present invention, the not structure to the present invention
Thinking and scope is defined, without departing under design concept premise of the present invention, in this area, ordinary skill technical staff is to this
Various modification that bright technical scheme is made and improvement, all should fall into protection scope of the present invention, the skill that the present invention is claimed
Art content is the most all recorded in detail in the claims.
Claims (6)
1., for a trough aluminium alloy framework for MRI radio-frequency shield room, it is characterized in that including that several mutually shield is connected as
The trough aluminium alloy framework screen unit of one general frame structure, described each trough aluminium alloy framework screen unit includes grooved
Aluminium alloy joist (1) and aluminium alloy decorative Os Draconis (2), trough aluminium alloy Os Draconis (1) constitute trough aluminium alloy framework screen unit
Frame, aluminium alloy decorative Os Draconis (2) connect the trough aluminium alloy Os Draconis (1) that 2 limits are relative.
A kind of trough aluminium alloy framework for MRI radio-frequency shield room the most according to claim 1, it is characterised in that adjacent
Being folded with copper shield sheet (3) between described trough aluminium alloy framework screen unit, copper shield sheet (3) is folded in adjacent grooved aluminum
Between alloy Os Draconis (1), copper shield sheet (3) is corner-shape structure, between adjacent trough aluminium alloy Os Draconis (1) by nut (4),
Pad (5) and screw (6) connect.
A kind of trough aluminium alloy framework for MRI radio-frequency shield room the most according to claim 1, it is characterised in that adjacent
Described trough aluminium alloy framework screen unit, by connecting without the shielding of magnetic screw constant moment of force, is combined into metope screen layer, top screen
Cover layer, and be connected with the shielding of ground screen layer respectively, be combined into a faraday cup.
A kind of trough aluminium alloy framework for MRI radio-frequency shield room the most according to claim 1, it is characterised in that described
Trough aluminium alloy Os Draconis (1) generally grooved, 2 edges, limit of its grooved are provided with fillet (10), and grooved bottom outside is provided with plane
Groove (11), the first triangular groove (12) and the second triangular groove (13).
A kind of trough aluminium alloy framework for MRI radio-frequency shield room the most according to claim 1, it is characterised in that described
Aluminium alloy decorative Os Draconis (2) generally grooved, it is provided with the first vertical gear (20) and the second vertical gear (21), and first vertical keeps off (20) and the
The edge of two vertical gears (21) is respectively equipped with the first hook plate (23) and the second hook plate (22), and aluminium alloy decorative Os Draconis are additionally provided with on (2)
Strengthening groove (24), the second vertical gear (21) is provided with decorative keel triangular groove (25).
A kind of trough aluminium alloy framework for MRI radio-frequency shield room the most according to claim 1, it is characterised in that described
Carbon dioxide welding is used between trough aluminium alloy Os Draconis (1) and aluminium alloy decorative Os Draconis (2).
Priority Applications (1)
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CN201610669962.5A CN106121037B (en) | 2016-08-15 | 2016-08-15 | A kind of trough aluminium alloy framework for MRI radio-frequency shield rooms |
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CN201610669962.5A CN106121037B (en) | 2016-08-15 | 2016-08-15 | A kind of trough aluminium alloy framework for MRI radio-frequency shield rooms |
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CN106121037A true CN106121037A (en) | 2016-11-16 |
CN106121037B CN106121037B (en) | 2017-10-10 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110397332A (en) * | 2019-08-10 | 2019-11-01 | 北京亿策工程技术有限公司 | A kind of welding split-mounting type shield |
CN113226003A (en) * | 2021-03-29 | 2021-08-06 | 李志珍 | Material system of radio frequency shielding layer for MRI shielding room |
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CN2038271U (en) * | 1988-09-10 | 1989-05-24 | 浙江省诸暨医疗电子器械厂 | Splicing electromagnetic-scree-ned room |
JPH02209542A (en) * | 1989-02-06 | 1990-08-21 | Riken Corp | Electromagnetic shield panel and fixing method thereof |
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CN2760162Y (en) * | 2004-12-17 | 2006-02-22 | 常州利明屏蔽有限公司 | Shielding room |
JP2008255617A (en) * | 2007-04-03 | 2008-10-23 | Kajima Corp | Electromagnetic shield room |
CN201263287Y (en) * | 2008-06-20 | 2009-06-24 | 常州市长城屏蔽机房设备有限公司 | Module combined shielded chamber |
CN204850237U (en) * | 2015-07-24 | 2015-12-09 | 株洲合力电磁技术有限公司 | Section bar for EM shielded room |
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2016
- 2016-08-15 CN CN201610669962.5A patent/CN106121037B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2038271U (en) * | 1988-09-10 | 1989-05-24 | 浙江省诸暨医疗电子器械厂 | Splicing electromagnetic-scree-ned room |
JPH02209542A (en) * | 1989-02-06 | 1990-08-21 | Riken Corp | Electromagnetic shield panel and fixing method thereof |
JP2000320042A (en) * | 1999-05-14 | 2000-11-21 | Shimizu Corp | Electromagnetic wave shielded construction room |
CN2760162Y (en) * | 2004-12-17 | 2006-02-22 | 常州利明屏蔽有限公司 | Shielding room |
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CN201263287Y (en) * | 2008-06-20 | 2009-06-24 | 常州市长城屏蔽机房设备有限公司 | Module combined shielded chamber |
CN204850237U (en) * | 2015-07-24 | 2015-12-09 | 株洲合力电磁技术有限公司 | Section bar for EM shielded room |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110397332A (en) * | 2019-08-10 | 2019-11-01 | 北京亿策工程技术有限公司 | A kind of welding split-mounting type shield |
CN110397332B (en) * | 2019-08-10 | 2024-03-12 | 北京亿策工程技术有限公司 | Welding assembly combined shielding body |
CN113226003A (en) * | 2021-03-29 | 2021-08-06 | 李志珍 | Material system of radio frequency shielding layer for MRI shielding room |
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Effective date of registration: 20211224 Address after: 213000 No. 163-8, Dongfang East Road, Changzhou City, Jiangsu Province Patentee after: JIN LI DA ELECTRONIC (CHANGZHOU) CO.,LTD. Address before: 213025 No. 163-8, Dongfang East Road, Changzhou City, Jiangsu Province Patentee before: Li Zhizhen Patentee before: Li Jun |