CN208971906U - A kind of magnesium alloy electromagnetic shielding chamber - Google Patents
A kind of magnesium alloy electromagnetic shielding chamber Download PDFInfo
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- CN208971906U CN208971906U CN201821363401.3U CN201821363401U CN208971906U CN 208971906 U CN208971906 U CN 208971906U CN 201821363401 U CN201821363401 U CN 201821363401U CN 208971906 U CN208971906 U CN 208971906U
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Abstract
The utility model discloses a kind of magnesium alloy electromagnetic shielding chambers, it includes: screened room panel, wiring window, exhaust pipe, joggle connector and filter, the top of screened room panel is fixedly connected with joggle connector, the front of screened room panel is fixedly connected with gate, the left and right sides of screened room panel is engaged with side plate, it is fixedly installed with wiring window on the side plate in left side, is fixedly connected with filter on the right side of wiring window.This kind of magnesium alloy electromagnetic shielding chamber, the hexahedron of screened room is attached using joggle connector correspondingly, at this moment in the tenon insertion mortise of joggle connector, two plates are secured together using the frictional force between tenon and mortise, pass through filter, the cable input and output side of screened room can be all connected on filter, so playing the installation and removal for facilitating screened room using the installation of joggle connector, facilitate the effect for eliminating the electromagnetic radiation of cable bring.
Description
Technical field
The utility model relates to screened room technical field, especially a kind of magnesium alloy electromagnetic shielding chamber.
Background technique
Electromagnetic shielding chamber or electromagnetic shield, refer to be specifically designed can be to the electricity of electronic information equipment or system
Magnetic dispersion emitted energy plays the obturator of attenuation, and the internal electric, magnetic field not by the external world is made to be influenced or make outside not by it
A kind of structure that portion's electricity, magnetic field influence.It utilizes shielding principle, is made of metal material hexahedron room, passes through metal plate pair
Incident or outflow electromagnetic wave absorption loss, interface reflection loss and plate internal reflection loss, subtract the energy of its electromagnetic wave significantly
It is weak, and screened room is made to realize shielding action.Screened room mainly has welded type, pin-connected panel and straight mounted three kinds of connection types at present,
Every kind of connection type has its corresponding advantage and disadvantage, when taking different connection types, can have an impact to shield effectiveness.Wherein
Welded type connection, i.e., weld the seam of adjacent two pieces of metal shielding boards, however shielded layer used in screened room is golden from the beginning to the end
Belong to general thicker, be in the welding that little space completes various angles it is very difficult, usually can make to connect due to bad spot welding
There is crack in the place of connecing, and ideal seal degree is not achieved, and leads to the reduction of bulk shielding efficiency；Wherein pin-connected panel connects, and first will
Six face shield plates of its shield shell are formed through special purpose machine tool mold flanging, then pass through bolt, nut, gasket and conductive gasket
Assembly and connection forms, but the assembling of pin-connected panel connection, disassembly processing are stronger, requires installation process stringent, is sometimes difficult to
Reach seal standard, magnetic flux leakage occurs；Wherein straight mounted screened room, shield shell is clipped, bending, two-sided makees at anticorrosion
Reason is fabricated to unit module, is then distributed keel according to construction wall size, keel frame is fixed among wall, finally will
Barricade is fixed on keel, and the gap between barricade makes six whole faces by the way of bolt and soldering
Shell is covered, but straight mounted screened room simple to install causes shield effectiveness lower without additional seal approach, can not be applicable in
In the environment of high shield effectiveness.
Comprehensively consider current existing screened room connection method, it is found that different connection types has its corresponding defect.
Screened room is to measure the essential condition of a screened room quality, and how to allow electromagnetic wave as much as possible to the blocking degree of electromagnetic wave
By reflecting or reflecting consumption or decaying, and gap or the entrance of other approach cannot be easily passed through or project screened room, become
The key point that we study.In addition, the material of electromagnetic shielding chamber is mostly copper, nickel, steel, lead, aluminium, tempered glass and graphite now
The materials such as alkene do not have lightweight however, metal material such as copper, nickel isodensity is larger；The shield effectiveness of aluminium is bad；Tempering glass
Glass and graphene composite material plastic forming performance are poor.Therefore, develop excellent a kind of low-density, electromagnet shield effect, forming,
The electromagnetic shielding chamber of high recycling rate be cope with increasingly complicated electromagnetic environment there is an urgent need to.
Utility model content
The purpose of the utility model is to provide a kind of magnesium alloy electromagnetic shielding chambers, solve the above problems.
In order to solve the above technical problems, the utility model adopts the following technical solutions:
A kind of magnesium alloy electromagnetic shielding chamber, including screened room panel, wiring window, exhaust pipe, joggle connector and filter,
The top of the screened room panel is fixedly connected with joggle connector, and the front of the screened room panel is fixedly connected with shutter
Door, the left and right sides of the screened room panel is engaged with side plate, wiring window, institute is fixedly installed on the side plate in the left side
It states and is fixedly connected with filter on the right side of wiring window, signal wire is fixedly connected on the right side of the filter, the side plate
Rear end is engaged with backboard, and the top of the screened room panel, side plate and backboard is engaged with top plate, the screened room panel, side
The bottom of plate and backboard is engaged with bottom plate, and the upper surface of the top plate, which is run through, is connected with exhaust pipe, the inside of the exhaust pipe
It is fixedly installed with waveguide window, the upper surface of the bottom plate is fixedly connected with stability column.The utility model devises a kind of completely new
Connection type-joggle method is attached screened room material using joggle method, increases screened room integral strength, maximizes decaying
Radiation value.In addition the utility model is removable and mobile, saves secondary resettlement investment cost, while can be according to site condition, spirit
Adjustment screened room scale living.
Magnesium alloy electromagnetic shielding chamber above-mentioned, the screened room panel, side plate, backboard, top plate and bottom plate material be magnesium
Alloy.Specifically, magnesium alloy type can be AZ31 or LZ91.Magnesium alloy has both the advantage of low-density Yu high shielding, will
It, as screened room material, is the primary new exploration in electromagnetic shielding material field.Magnesium alloy is being able to satisfy shield shield effectiveness
Technical requirements while, moreover it is possible to play the advantage of its low-density, will there is broader practice prospect in contrast.Equally, magnesium
Alloy is not needed as composite material as shielding material, adds conductive fiber in the base, more environmentally friendly, is easy cutting and is added
Work is manufactured, the shell and screened room suitable for electronic electric equipment.When magnesium alloy is used as shielding material, with biography
System metal phase ratio, the high advantage of low, light weight, specific strength with density；With foamed material, coating, composite material are compared, and magnesium closes
Fitting has excellent mechanical property, electromagnetic shielding performance and environmentally friendly.
Magnesium alloy electromagnetic shielding chamber above-mentioned is fixedly connected with shielding baffle, the shielding on the left of the wiring window
The inside of baffle is fixedly installed with filter, and the lateral wall of shielding baffle and the side plate in left side fit closely.
Magnesium alloy electromagnetic shielding chamber above-mentioned, the inside of the waveguide window are fixedly installed with the bee that size and depth are equal
Cavities mouth, and each hole at honeycomb hole is hexagonal.
Magnesium alloy electromagnetic shielding chamber above-mentioned, the front end of the joggle connector are fixedly installed with tenon, the every two tenon
A mortise is fixedly connected between head, the tenon is in " inverted trapezoidal ", and mortise is in " trapezoidal ", and tenon matches with mortise.
Joggle refers to the joint method of tenon insertion mortise or tongue-and-groove, is the basic combination of China's classic furniture and modern furniture,
It is also modern frame-type furniture mainly in combination with mode.Joggle is that two block of material one makes tenon, and one is made mortise, two
Through together, two block of material are fixed together by the frictional force by material.Joggle is the common skill of China's traditional architecture, is first
People's crystallization of wisdom can often be found in ancient building or temple.Joggle is usually used in building, furniture industry, and we are this time
This connection type is applied to metal field, is a kind of innovation and a kind of exploration.We will be by calculating, corresponding
The cutting of sheet metal position, is matched by tenon and mortise, and then two pieces of metal plates are attached.Using Same Way,
Corresponding cutting design is carried out to other sheet metals, cutting, installation, connection is then carried out, is assembled into a hexahedral screen
Cover room.By the connection type of joggle, we will make as much as possible electromagnetic wave disappear inside and outside screened room by reflecting or reflecting
Consumption, can not easily enter or project screened room.Meanwhile using the connection type of joggle, it can also be ensured that screened room reaches one
Fixed intensity.The inner surface and the outer surface of magnesium alloy electromagnetic shielding chamber above-mentioned, the joggle connector 4 is pasted with conducting resinl
Band.Electromagnetic shielding chamber has stringent leakproofness and integrity demands, although can mask one by reflecting or reflecting using joggle
Part electromagnetic wave, but the junction of screened room still has certain gap, it is sufficiently complete to will cause screened room, leads to electromagnetic field
Leakage makes fraction of electromagnetic radiation enter or flow out by gap.Especially electromagnetic-field-shielded, it is using shield in high frequency
Generated under the action of magnetic field opposite direction eddy current magnetism and former magnetic field cancellation and weaken high frequency magnetic field interference.If screened room is inadequate
Completely, the effect of vortex reduces, that is, the effect shielded is had a greatly reduced quality.Meanwhile to guarantee the high-effect of shielding material, it is necessary to tie up
Hold sufficiently low impedance.Therefore, conductive tape is pasted, is to guarantee the integrality of screened room and reduce gap, reduce and stitched in shielding
The best bet of transimpedance at gap further increases screened room leakproofness by pasting conductive tape, enhances shield effectiveness.
Magnesium alloy electromagnetic shielding chamber above-mentioned is fixedly connected with left positioning ring, the left positioning in the middle part of the stability column
Right positioning ring is fixedly installed at the top of ring, and the aperture of left positioning ring and right positioning ring is greater than the diameter of stability column.
Magnesium alloy electromagnetic shielding chamber above-mentioned, the bottom end of the stability column are socketed with positioning column, the positioning column and bottom plate
Lower end surface be fixedly connected, and the axle center of positioning column, right positioning ring and left positioning ring is on same straight line.
Magnesium alloy electromagnetic shielding chamber above-mentioned, the front of the wiring window are fixedly connected with cover board, the cover board it is interior
Portion is fixedly installed with filter, and the size of cover board is equal with the cross sectional dimensions of filter.
Magnesium alloy electromagnetic shielding chamber above-mentioned is fixedly connected with cable body fixing terminal, and line in the middle part of the wiring window
The lateral wall of body fixing terminal is closely fitted with screw thread.
Compared with prior art, the utility model has the beneficial effect that
1, the utility model devises a kind of completely new connection type-joggle method for electromagnetic shielding chamber, increases screened room
Integral strength maximizes degrading radiation value；In addition this kind of design method assembly and disassembly are simple, sealing is high, are not in occur
Magnetic flux leakage, after re-moving assembly, shielding properties is also unaffected；When solving previous screened room installation using welding or
The mode that person squeezes into bolt is fixed, and time-consuming for installation, and the difficult problem for causing utilization rate low of disassembly solves previous screened room and connects
The cable entered has electromagnetic wave, causes the inside and outside abnormal problem of communication of screened room, so that the utility model is become one kind can
Mobile electromagnetic shielding equipment, is worth of widely use；
2, this kind of magnesium alloy electromagnetic shielding chamber is fixedly connected with joggle connector on the top of screened room panel, passes through joggle
The hexahedron of screened room is attached using joggle connector, at this moment joggle connects by connector correspondingly when installing screened room
In the tenon insertion mortise of head, two plates are secured together using the frictional force between tenon and mortise, and not
It needs to be sent to assembled use elsewhere in use, screened room can be removed, be used when solving previous screened room installation
The mode for welding or squeezing into bolt is fixed, and time-consuming for installation, the difficult problem for causing utilization rate low of disassembly, so utilizing joggle
Connector installs the effect for playing the installation and removal for facilitating screened room；
3, this kind of magnesium alloy electromagnetic shielding chamber is fixedly connected with filter on the right side of wiring window, can by filter
The cable input and output side of screened room is all connected on filter, at this moment, filter is by bring electromagnetic radiation in cable
Filtering, prevents electromagnetic radiation from entering inside screened room, causes the shield effectiveness inside screened room to decline, solve previous screened room
The cable of access has electromagnetic wave, causes the inside and outside abnormal problem of communication of screened room, eliminates cable bring to play
The effect of electromagnetic radiation；
4, this kind of magnesium alloy electromagnetic shielding chamber is fixedly connected with shielding baffle on the left of wiring window, is kept off by shielding
Gap between filter installation position and screened room can be filled up and be covered in by plate, because passing through cable Shi Yaoxian on side plate
Inevitably there is small gap after mounting in aperture, and at this moment, extraneous electromagnetic wave has part to enter in screened room by gap, causes
The shield effectiveness of screened room declines, and solving the problems, such as previous screened room connecting part, there are small gaps, so shielding baffle rises
It has arrived the effect of the gap shielding of connecting part；
5, this kind of magnesium alloy electromagnetic shielding chamber is fixedly installed with honeycomb hole in the inside of waveguide window, by honeycomb hole,
Ozone can be discharged into screened room by the honeycomb hole of waveguide window, to meet the ventilation effect of screened room, meanwhile,
The cut-off waveguide beam that waveguide window is made of many small cut-off waveguides, cross sectional shape are hexagon, because regular hexagon
The wave mode that waveguide allows to propagate is fewer than the waveguide of other shapes, therefore advantageously to the isolation of electromagnetic wave, solve previous screen
Covering room has the problem of shield effectiveness that cannot have possessed in the case where guaranteeing ventilation, so honeycomb hole is before guaranteeing ventilation
It puts and also etc. brings good shield effectiveness；
6, this kind of magnesium alloy electromagnetic shielding chamber is fixedly connected with stability column in the upper surface of bottom plate, by stability column, works as screen
When covering room hexahedron and being completed, stability column can be sequentially inserted into right positioning ring, left positioning ring and positioning column, it is fixed by axle center
The mode of position, two pieces therein of the hexahedron connecting with right positioning ring and left positioning ring are secured together, is solved previous
Screened room panel is easy that the problem of gap influence shield effectiveness is exposed in small offset occurs when in use, so fixing from axle center
Stability column play promoted screened room Soil stability effect.
Detailed description of the invention
Fig. 1 is the overall structure figure of the utility model；
Fig. 2 is the joggle connector figure of the utility model；
Fig. 3 is the filter graph of the utility model；
Fig. 4 is the internal structure chart of the utility model；
Fig. 5 is the stability column structure chart of the utility model；
Fig. 6 is the waveguide window structure chart of the utility model.
The meaning of appended drawing reference: 1- screened room panel, 2- wiring window, 3- exhaust pipe, 4- joggle connector, 5- stability column,
6- side plate, 7- top plate, 8- bottom plate, 9- gate, 10- backboard, 11- cover board, 12- wire body fixing terminal, 13- shield baffle,
14- filter, 15- signal wire, 16- waveguide window, 17- honeycomb hole, 18- tenon, 19- mortise, the right positioning ring of 20-, the left side 21- are fixed
Position ring, 22- positioning column.
The utility model is further described with reference to the accompanying drawings and detailed description.
Specific embodiment
The embodiments of the present invention 1: as shown in figs 1 to 6, a kind of magnesium alloy electromagnetic shielding chamber includes screened room panel
1, wiring window 2, exhaust pipe 3, joggle connector 4 and filter 14, the top of the screened room panel 1 are fixedly connected with joggle and connect
First 4, the front of the screened room panel 1 is fixedly connected with gate 9, and the left and right sides of the screened room panel 1 is engaged
There is side plate 6, wiring window 2 is fixedly installed on the side plate 6 in the left side, the right side of the wiring window 2 is fixedly connected with filter
Wave device 14, the right side of the filter 14 are fixedly connected with signal wire 15, and the rear end of the side plate 6 is engaged with backboard 10, described
The top of screened room panel 1, side plate 6 and backboard 10 is engaged with top plate 7, the screened room panel 1, side plate 6 and backboard 10
Bottom is engaged with bottom plate 8, and through exhaust pipe 3 is connected with, the inside of the exhaust pipe 3 is fixed to pacify for the upper surface of the top plate 7
Equipped with waveguide window 16, the upper surface of the bottom plate 8 is fixedly connected with stability column 5.The utility model devises a kind of completely new company
Mode-joggle method is connect, screened room material is attached using joggle method, increases screened room integral strength, maximizes decaying spoke
Penetrate value.In addition the utility model is removable and mobile, saves secondary resettlement investment cost, while can be according to site condition, flexibly
Adjust screened room scale.The screened room panel 1, side plate 6, backboard 10, top plate 7, bottom plate 8 material be magnesium alloy.Specifically
, magnesium alloy type can be AZ31 or LZ91.Magnesium alloy has both the advantage of low-density Yu high shielding, as shielding
Room material is the primary new exploration in electromagnetic shielding material field.Magnesium alloy is in the technical requirements for being able to satisfy shield shield effectiveness
While, moreover it is possible to the advantage of its low-density is played, there will be broader practice prospect in contrast.Equally, magnesium alloy is as screen
Cover material, do not need as composite material, add conductive fiber in the base, it is more environmentally friendly, be easy machining, manufacture at
Type, shell and screened room suitable for electronic electric equipment.When magnesium alloy is used as shielding material, with conventional metals phase
Than the high advantage of low, light weight, specific strength with density；With foamed material, coating, composite material are compared, and magnesium alloy has excellent
Good mechanical property, electromagnetic shielding performance and environmentally friendly.
Embodiment 2: as shown in figs 1 to 6, a kind of magnesium alloy electromagnetic shielding chamber include screened room panel 1, wiring window 2,
Exhaust pipe 3, joggle connector 4 and filter 14, the top of the screened room panel 1 are fixedly connected with joggle connector 4, the shielding
The front of room panel 1 is fixedly connected with gate 9, and the left and right sides of the screened room panel 1 is engaged with side plate 6, described
Wiring window 2 is fixedly installed on the side plate 6 in left side, the right side of the wiring window 2 is fixedly connected with filter 14, the filter
The right side of wave device 14 is fixedly connected with signal wire 15, and the rear end of the side plate 6 is engaged with backboard 10, the screened room panel 1, side
The top of plate 6 and backboard 10 is engaged with top plate 7, and the bottom of the screened room panel 1, side plate 6 and backboard 10 is engaged with bottom
Plate 8, through exhaust pipe 3 is connected with, the inside of the exhaust pipe 3 is fixedly installed with waveguide window 16, institute for the upper surface of the top plate 7
The upper surface for stating bottom plate 8 is fixedly connected with stability column 5.The utility model devises a kind of completely new connection type-joggle method,
Screened room material is attached using joggle method, increases screened room integral strength, maximizes degrading radiation value.In addition this is practical
Novel removable and movement save secondary resettlement investment cost, while screened room scale can be adjusted flexibly according to site condition.
Further, the front end of the joggle connector 4 is fixedly installed with tenon 18, fixes between the every two tenon 18
It is connected with a mortise 19, the tenon 18 is in " inverted trapezoidal ", and mortise 19 is in " trapezoidal ", and tenon 18 matches with mortise 19.
Joggle refers to the joint method of tenon insertion mortise or tongue-and-groove, is the basic combination of China's classic furniture and modern furniture,
It is also modern frame-type furniture mainly in combination with mode.Joggle is that two block of material one makes tenon, and one is made mortise, two
Through together, two block of material are fixed together by the frictional force by material.Joggle is the common skill of China's traditional architecture, is first
People's crystallization of wisdom can often be found in ancient building or temple.Joggle is usually used in building, furniture industry, and we are this time
This connection type is applied to metal field, is a kind of innovation and a kind of exploration.We will be by calculating, corresponding
The cutting of sheet metal position, is matched by tenon and mortise, and then two pieces of metal plates are attached.Using Same Way,
Corresponding cutting design is carried out to other sheet metals, cutting, installation, connection is then carried out, is assembled into a hexahedral screen
Cover room.By the connection type of joggle, we will make as much as possible electromagnetic wave disappear inside and outside screened room by reflecting or reflecting
Consumption, can not easily enter or project screened room.Meanwhile using the connection type of joggle, it can also be ensured that screened room reaches one
Fixed intensity.The inner surface and the outer surface of the joggle connector 4 is pasted with conductive tape.Electromagnetic shielding chamber has stringent sealing
Property and integrity demands, although using joggle a part of electromagnetic wave, the company of screened room can be masked by reflecting or reflecting
The place of connecing still has certain gap, and it is sufficiently complete to will cause screened room, causes electromagnetic field to leak, passes through fraction of electromagnetic radiation
Gap enters or outflow.Especially electromagnetic-field-shielded, it generates opposite direction using shield under the action of high frequency magnetic field
Eddy current magnetism and former magnetic field cancellation and weaken high frequency magnetic field interference.If screened room is sufficiently complete, the effect of vortex is reduced, that is, is shielded
The effect covered is had a greatly reduced quality.Meanwhile to guarantee the high-effect of shielding material, it is necessary to maintain sufficiently low impedance.Therefore, it pastes
Conductive tape is to guarantee the integrality of screened room and reduce gap, reduce the best bet for shielding transimpedance at upper gap,
Screened room leakproofness is further increased by pasting conductive tape, enhances shield effectiveness.
Embodiment 3: as shown in figs 1 to 6, a kind of magnesium alloy electromagnetic shielding chamber include screened room panel 1, wiring window 2,
Exhaust pipe 3, joggle connector 4 and filter 14, the top of screened room panel 1 are fixedly connected with joggle connector 4, pass through joggle connector
4, when installing screened room, the hexahedron of screened room is attached using joggle connector 4 correspondingly, at this moment joggle connector
Tenon 18 be inserted into mortise 19 in, two plates are secured together using the frictional force between tenon 18 and mortise 19, with
The effect for playing the installation and removal for facilitating screened room is installed using joggle connector 4, the front of screened room panel 1 is fixedly connected
There is gate 9, the left and right sides of screened room panel 1 is engaged with side plate 6, is fixedly installed with wiring windows on the side plate 6 in left side
Mouth 2, the right side of wiring window 2 is fixedly connected with filter 14, by filter 14, can output and input the cable of screened room
End is all connected on filter 14, and at this moment, filter 14 filters bring electromagnetic radiation in cable, prevents electromagnetic radiation from entering
Inside screened room, the shield effectiveness inside screened room is caused to decline, to play the effect for eliminating the electromagnetic radiation of cable bring
Fruit.Specifically, 14 model of filter (EF-10A-40).The right side of filter 14 is fixedly connected with signal wire 15, side plate 6
Rear end is engaged with backboard 10, and the top of screened room panel 1, side plate 6 and backboard 10 is engaged with top plate 7, the screened room panel
1, the bottom of side plate 6 and backboard 10 is engaged with bottom plate 8, the upper surface of top plate 7 through being connected with exhaust pipe 3, exhaust pipe 3 it is interior
Portion is fixedly installed with waveguide window 16, and the upper surface of bottom plate 8 is fixedly connected with stability column 5, by stability column 5, when six face of screened room
When body is completed, stability column 5 can be sequentially inserted into right positioning ring 20, left positioning ring 21 and positioning column 5, be positioned by axle center
Mode, two pieces therein of the hexahedron connecting with right positioning ring 20 and left positioning ring 21 are secured together, so from axle center
Fixed stability column 5 plays the effect for promoting screened room Soil stability.Further, the screened room panel 1, side plate 6,
Backboard 10, top plate 7, bottom plate 8 material be magnesium alloy.Specifically, magnesium alloy type can be AZ31 or LZ91.Magnesium alloy
The advantage for having both low-density Yu high shielding is the primary new exploration in electromagnetic shielding material field as screened room material.
Measure of merit is carried out to magnesium alloy electromagnetic shielding chamber, is tested by X ray test, microwave radiation test and radio wave, discovery
Magnesium alloy electromagnetic shielding chamber has good shield effectiveness for electromagnetic wave.The screened room and other materials screened room are subjected to weight
Comparison, magnesium alloy electromagnetic shielding chamber meet lightweight requirements relative to other screened room losss of weight 45% or so.Magnesium alloy can expire
While the technical requirements of sufficient shield shield effectiveness, moreover it is possible to play the advantage of its low-density, will have in contrast broader
Application prospect.Equally, magnesium alloy is not needed as composite material as shielding material, adds conductive fiber in the base, more
Environmental protection is easy machining, is manufactured, the shell and screened room suitable for electronic electric equipment.When magnesium alloy is used as screen
When covering material, compared with conventional metals, the high advantage of low, light weight, specific strength with density；With foamed material, coating is answered
Condensation material is compared, and magnesium alloy has excellent mechanical property, electromagnetic shielding performance and environmentally friendly.
Further, the left side of wiring window 2 is fixedly connected with shielding baffle 13, and the inside of shielding baffle 13 is fixedly mounted
There is filter 14, and the lateral wall of shielding baffle 13 and the side plate 6 in left side fit closely, and by shielding baffle 13, can will filter
Gap between 14 installation position of device and screened room is filled up and is covered in, because passing through cable Shi Yaoxian aperture on side plate 6, is pacifying
Inevitably occurs small gap after dress, at this moment, extraneous electromagnetic wave has part to enter in screened room by gap, causes the screen of screened room
Efficiency decline is covered, solving the problems, such as previous screened room connecting part, there are small gaps, so shielding baffle 13 is played and will be connect
The effect of gap shielding at line.
Further, the inside of the waveguide window 16 is fixedly installed with the honeycomb hole 17 that size and depth are equal, and
Each hole at honeycomb hole 17 is hexagonal, by honeycomb hole 17, in the bee that ozone can be passed through to waveguide window 16
Cavities mouth 17 is discharged into screened room, to meet the ventilation effect of screened room, meanwhile, waveguide window 16 is by many small cut-off waveguides
The cut-off waveguide beam of composition, cross sectional shape is hexagon, because the waveguide of regular hexagon allows the wave mode propagated than other shapes
The waveguide of shape is few, therefore advantageously to the isolation of electromagnetic wave, solve previous screened room has not in the case where guaranteeing ventilation
The problem of shield effectiveness that can have possessed, so good shielding effect also etc. is brought at honeycomb hole 17 under the premise of guaranteeing ventilation
Fruit.
Further, the front end of joggle connector 4 is fixedly installed with tenon 18, is fixedly connected with one between every two tenon 18
A mortise 19, tenon 18 is in " trapezoidal " in " inverted trapezoidal " mortise, and tenon 18 matches with mortise 19, passes through mortise 19 and tenon
18, when installing six blocks of plates of screened room, tenon 18 can be inserted into mortise 19, utilize rubbing between tenon 18 and mortise 19
Power is wiped to be secured together two plates, and easy for installation, when disassembly, only needs to pull up tenon 18 from mortise 19,
To play the effect for facilitating screened room to mount and dismount.The inner surface and the outer surface of the joggle connector 4, which is pasted with, to be led
Electric adhesive tape electromagnetic shielding chamber has stringent leakproofness and integrity demands, although can be masked by reflecting or reflecting using joggle
A part of electromagnetic wave, but the junction of screened room still has certain gap, it is sufficiently complete to will cause screened room, leads to electromagnetism
Field leakage makes fraction of electromagnetic radiation pass through gap and enters or flow out.Especially electromagnetic-field-shielded, it is using shield in height
Generated under the action of frequency magnetic field opposite direction eddy current magnetism and former magnetic field cancellation and weaken high frequency magnetic field interference.If screened room is not
Enough complete, the effect of vortex reduces, that is, the effect shielded is had a greatly reduced quality.Meanwhile to guarantee the high-effect of shielding material, it is necessary to
Maintain sufficiently low impedance.Therefore, conductive tape is pasted, is to guarantee the integrality of screened room and reduce gap, reduce in shielding
The best bet of transimpedance at gap further increases screened room leakproofness, enhancing shielding effect by pasting conductive tape
Energy.Specifically, conductive tape can be copper-foil conducting electricity adhesive tape, the closed screened room of sheet metal composition of copper foil and surrounding, dimension
Sufficiently low impedance is held, continuous conduction is formed.Meanwhile copper-foil conducting electricity adhesive tape has preferable shield effectiveness to electromagnetic radiation, it is right
There is good performance in ground connection static discharge.
Further, the middle part of stability column 5 is fixedly connected with left positioning ring 21, and the top of left positioning ring 21 is fixedly installed with
Right positioning ring 20, and the aperture of left positioning ring 21 and right positioning ring 20 is greater than the diameter of stability column 5, passes through left positioning ring 21 and a left side
Stability column 5 can be sequentially inserted into right positioning ring 20, left positioning ring 21 and positioning column 5 by positioning ring 20, the side positioned by axle center
Two pieces therein of the hexahedron connecting with right positioning ring 20 and left positioning ring 21 are secured together by formula, to play raising screen
The effect for covering the hexahedral stability in room prevents screened room crooked.
Further, the bottom end of stability column 5 is socketed with positioning column 22, and positioning column 22 is fixedly connected with the lower end surface of bottom plate 8,
And the axle center of positioning column 22, right positioning ring 20 and left positioning ring 21 is on same straight line, by positioning column 22, when can be by stabilization
Column 22 is sequentially inserted into right positioning ring 20, left positioning ring 21 and positioning column 5, two that right positioning ring 20 is connected with left positioning ring 21
Block plate is all connected on stability column 5, and at this moment, while stability column 5 is fixed on bottom plate 8, to play in six pieces of panels in addition
Effect on five pieces of fixed bottom plates 8.
Further, the front of wiring window 2 is fixedly connected with cover board 11, and the inside of cover board 11 is fixedly installed with filter
14, and the size of cover board 11 is equal with the cross sectional dimensions of filter 14, being worked as on wiring window 2 by cover board 11 does not have conducting wire to connect
It is fashionable, cover board 11 can be covered, prevent extraneous dust from entering 12 in wire body fixing terminal, be adsorbed onto 12 in wire body fixing terminal
On metal strip in, cause in wire body fixing terminal 12 inside blockings to influence the signal transmission effect of cables, so cover board 11 rises
12 effect into protection wire body fixing terminal.
Further, the middle part of wiring window 2 is fixedly connected with cable body fixing terminal 12, and wire body fixing terminal 12 is outer
Side wall is closely fitted with screw thread, by wire body fixing terminal 12, can be plugged into cable on 12 in wire body fixing terminal, and pass through
Screw thread is fixed on 12 outer walls in wire body fixing terminal, prevents when in use, and cable is fallen from 12 in wire body fixing terminal,
The signal Transmission of cable is caused, to play the effect for improving the stability connected between 12 in cable and wire body fixing terminal
Fruit.
The working principle being electromagnetically shielded in the utility model: four classes of the principle of electromagnetic shielding point,
(1) electrostatic screen
Positively charged conductor surrounded is got up with complete metal shield, will be induced in the inside of shield and with conductance
The negative electrical charge of body equivalent, there is the positive charge with energized conductor equivalent in outside, if metal shield is grounded, outside is just
Charge will flow into the earth, and outside will not be with the presence of electric field, i.e., the electric field of positively charged conductor is shielded in metallic shield body；
(2) alternating electric field shields
To reduce alternating electric field to the coupled interference voltage of sensitive circuit, can be arranged between interference source and sensitive circuit
The metal shield of good conductivity, and metal shield is grounded.Coupled interference voltage swing of the alternating electric field to sensitive circuit
Depending on alternating electric field voltage, the product of coupled capacitor and metal shield ground resistance.As long as trying to keep metal shield good
Ground connection, can make alternating electric field become very little to the coupled interference voltage of sensitive circuit；
(3) alternating magnetic field shields
Alternating magnetic field shielding is divided into high and low frequency, and low frequency magnetic field shielding is to constitute low magnetic using the material of high magnetic permeability
Access is hindered, is concentrated in most of magnetic field in shield, the magnetic conductivity of shield is higher, and thickness is bigger, and magnetic resistance is smaller, magnetic field
The effect of shielding is better；The shielding of high frequency magnetic field is that the opposing magnetic field of the vortex generated using the material of high conductivity is dry to offset
It disturbs magnetic field and realizes；
(4) alternating electromagnetic field shields
Shield is made using the high material of conductivity, and shield is grounded, using shield high frequency magnetic field effect
The lower eddy current magnetism for generating opposite direction and former magnetic field cancellation and the interference for weakening high frequency magnetic field, and electricity is realized because of shield ground connection
Field shielding.
The working method of the utility model: firstly, bottom plate 8 is put into plane, then, by 1 bottom of screened room panel
Tenon 18 is inserted into the mortise 19 on bottom plate 8, then, the tenon 18 on left and right sides side plate 6 is sequentially inserted into bottom plate 8 and top plate
In 7 mortise 19, then, the mortise 18 of backboard 10 is inserted into the mortise 19 of two blocks of side plates 6 and bottom plate 8, then, by top plate 7
Mortise 19 be set in the mortise 19 of screened room panel 1, side plate 6 and the top of backboard 10, then, open shielding and pound the door 9, will stablize
Column 5 is sequentially inserted into right positioning ring 20, left positioning ring 21 and positioning column 5, then, cable is screwed onto wire body and is fixed
In terminal 12, when not needing to be attached cable, cover board 11 is covered onto wiring window 2, when the signal in cable is with electricity
When magnetic disturbance enters, filter 14 filters electromagnetic wave, and then, exhaust pipe 3 discharges the air into screened room, then, waveguide window
The electromagnetic wave in air is eliminated at honeycomb hole 17 inside 16, when needing to remove screened room, by stability column 5 from calmly
It pulls up in the column 22 of position, then pulls up the tenon 18 on top plate 7, screened room panel 1, side plate 6 from mortise 19.
Claims (10)
1. a kind of magnesium alloy electromagnetic shielding chamber, it is characterised in that: including screened room panel (1), wiring window (2), exhaust pipe
(3), the top of joggle connector (4) and filter (14), the screened room panel (1) is fixedly connected with joggle connector (4), described
The front of screened room panel (1) is fixedly connected with gate (9), and the left and right sides of the screened room panel (1) is engaged with
Side plate (6) is fixedly installed with wiring window (2) on the side plate (6) in the left side, and the right side of the wiring window (2) is fixed to be connected
It is connected to filter (14), is fixedly connected with signal wire (15) on the right side of the filter (14), the rear end engagement of the side plate (6)
Have backboard (10), the top of the screened room panel (1), side plate (6) and backboard (10) is engaged with top plate (7), the shielding
The bottom of room panel (1), side plate (6) and backboard (10) is engaged with bottom plate (8), and the upper surface of the top plate (7) is through connection
Have exhaust pipe (3), the inside of the exhaust pipe (3) is fixedly installed with waveguide window (16), and the upper surface of the bottom plate (8) is fixed to be connected
It is connected to stability column (5).
2. magnesium alloy electromagnetic shielding chamber according to claim 1, it is characterised in that: the screened room panel (1), side plate
(6), backboard (10), top plate (7), bottom plate (8) material be magnesium alloy.
3. magnesium alloy electromagnetic shielding chamber according to claim 1, it is characterised in that: the left side of the wiring window (2) is solid
Surely it is connected with shielding baffle (13), the inside of shielding baffle (13) is fixedly installed with filter (14), and shields baffle
(13) side plate (6) of lateral wall and left side fits closely.
4. magnesium alloy electromagnetic shielding chamber according to claim 1, it is characterised in that: the inside of the waveguide window (16) is fixed
The honeycomb hole (17) that size and depth are equal is installed, and each hole of honeycomb hole (17) is hexagonal.
5. magnesium alloy electromagnetic shielding chamber according to claim 1, it is characterised in that: the front end of the joggle connector (4) is solid
Dingan County is equipped with tenon (18), is fixedly connected with a mortise (19) between the every two tenon (18), the tenon (18) is in
" inverted trapezoidal ", mortise (19) is in " trapezoidal ", and tenon (18) matches with mortise (19).
6. magnesium alloy electromagnetic shielding chamber according to claim 5, it is characterised in that: the inner surface of the joggle connector (4)
Conductive tape is pasted with outer surface.
7. magnesium alloy electromagnetic shielding chamber according to claim 1, it is characterised in that: the middle part of the stability column (5) is fixed
It is connected with left positioning ring (21), is fixedly installed with right positioning ring (20) at the top of the left positioning ring (21), and left positioning ring
(21) and the aperture of right positioning ring (20) be greater than stability column (5) diameter.
8. magnesium alloy electromagnetic shielding chamber according to claim 1, it is characterised in that: the bottom end of the stability column (5) is socketed
Have positioning column (22), the positioning column (22) is fixedly connected with the lower end surface of bottom plate (8), and positioning column (22), right positioning ring
(20) and the axle center of left positioning ring (21) is on same straight line.
9. magnesium alloy electromagnetic shielding chamber according to claim 1, it is characterised in that: the front of the wiring window (2) is solid
Surely it is connected with cover board (11), the inside of the cover board (11) is fixedly installed with filter (14), and the size and filter of cover board (11)
The cross sectional dimensions of wave device (14) is equal.
10. magnesium alloy electromagnetic shielding chamber according to claim 1, it is characterised in that: the middle part of the wiring window (2) is solid
Surely cable body fixing terminal (12) are connected, and the lateral wall of wire body fixing terminal (12) is closely fitted with screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821363401.3U CN208971906U (en) | 2018-08-23 | 2018-08-23 | A kind of magnesium alloy electromagnetic shielding chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821363401.3U CN208971906U (en) | 2018-08-23 | 2018-08-23 | A kind of magnesium alloy electromagnetic shielding chamber |
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| Publication Number | Publication Date |
|---|---|
| CN208971906U true CN208971906U (en) | 2019-06-11 |
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ID=66753580
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821363401.3U Active CN208971906U (en) | 2018-08-23 | 2018-08-23 | A kind of magnesium alloy electromagnetic shielding chamber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111642124A (en) * | 2020-06-19 | 2020-09-08 | 无锡市立达屏蔽机房成套有限公司 | High-frequency test shielding chamber and production process thereof |
| CN112616304A (en) * | 2020-11-20 | 2021-04-06 | 北京尚博信科技有限公司 | Safety terminal for mobile payment of gas station |
| CN113419114A (en) * | 2021-05-13 | 2021-09-21 | 北京航空航天大学 | Miniaturized broadband electromagnetic shielding testing device and testing method |
-
2018
- 2018-08-23 CN CN201821363401.3U patent/CN208971906U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111642124A (en) * | 2020-06-19 | 2020-09-08 | 无锡市立达屏蔽机房成套有限公司 | High-frequency test shielding chamber and production process thereof |
| CN112616304A (en) * | 2020-11-20 | 2021-04-06 | 北京尚博信科技有限公司 | Safety terminal for mobile payment of gas station |
| CN112616304B (en) * | 2020-11-20 | 2022-11-29 | 北京尚博信科技有限公司 | Safety terminal for mobile payment of gas station |
| CN113419114A (en) * | 2021-05-13 | 2021-09-21 | 北京航空航天大学 | Miniaturized broadband electromagnetic shielding testing device and testing method |
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