CN206728504U - A kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure - Google Patents
A kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure Download PDFInfo
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- CN206728504U CN206728504U CN201720586648.0U CN201720586648U CN206728504U CN 206728504 U CN206728504 U CN 206728504U CN 201720586648 U CN201720586648 U CN 201720586648U CN 206728504 U CN206728504 U CN 206728504U
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Abstract
The utility model discloses a kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure, is related to electromangnetic spectrum field；The cabinet includes electrical pure iron, foamed aluminium, silicon steel sheet, magnetic rivet, magnetic-conductive adhesive；The foamed aluminium, electrical pure iron, silicon steel sheet are all the materials of multilayer cabinet；Magnetic rivet is to ensure that foamed aluminium, electrical pure iron, silicon steel sheet are bonded each other, and entire combination is connected into cabinet, magnetic-conductive adhesive with silicon steel sheet magnetic, ensures that magnetic is continuous.The utility model has shielding electromagnetic field, protects electrical equipment, suppresses electromagnetic radiation, reduces eddy-current loss, ensures normal temperature rise, ensures the successional advantage of magnetic.
Description
Technical field
Electromangnetic spectrum field is the utility model is related to, more particularly to it is a kind of with special teeth groove, arc-shaped slot structure
Multilayer electromagnetic shielding cabinet.
Background technology
Electromagnetic field is the electric current generation by alternation, and the electric field changed over time produces magnetic field, the magnetic field production changed over time
Raw electric field, both influence each other, reciprocal causation.Electromagnetic field conducts in the form of an electromagnetic wave in atmosphere, easily to electronic equipment
Electromagnetic interference is caused, can also cause hazards of electromagnetic radiation to human body.
Electromagnetic shielding is that one kind suppresses alternating electromagnetic field radiation caused by alternating current using low-resistance metal good conductor
Shielding.When the electromagnetic wave of electromagnetic radiation reaches metal shield surface by air, because metallic conductor and air interface
The impedance in face is not continuous, so electromagnetic field will occur to reflect and reflect in interface.Reflection and the thickness of metal shield
It is not related, it is only relevant with the continuity of interface impedance.The electromagnetic field not reflected can enter the inside of shield, internally
Absorbed in transmitting procedure by shielding material.If still with the presence of electromagnetic field, at this moment electromagnetic field can pass to another of shield
Surface, refraction and reflection can occur again, reflecting part is turned again in shield, circulation so repeatedly, most electricity
Magnetic field is just attenuated.
Electromangnetic spectrum is the most important thing in Research on Electromagnetic Interference field all the time.Many electrical equipments all exist
Outside work, it is not strict to the demand of shielding, but just must be strict positioned at indoor electrical equipment electromagnetic shielding.Prevent electricity
Magnetic field exposure damages to neighbouring electronic equipment, information acquisition device and people.The gap of most of electromagnetic shielding cabinets does not all have
Strict processing is carried out, so the effect of shielding can be had adverse effect on.
However, the multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure can be handled gap, screen is allowed
Cover efficiency maximization.The method of a variety of cabinet gap processing again now be present, for example squeeze into polyurethane foam in the position in gap
Glue, conductive gasket etc., these methods can effectively handle hole and gap, but gap scope is small, for long gap processing
Effect is simultaneously bad, and therefore, this method is not widely used in long gap processing in Practical Project.
Utility model content
The utility model is in view of the shortcomings of the prior art, there is provided a kind of to have special teeth groove, the multilayer of arc-shaped slot structure
Electromagnetic shielding cabinet, in the hope of being capable of electromagnetic field caused by shielded electrical equipment.It can either realize that active shield can also be realized passively
Shielding, electromagnetic field is strapped in cabinet either electromagnetic field is blocked in outside cabinet, so that it is guaranteed that protected electrically set
Standby operation steady in a long-term.
The utility model realizes solve above-mentioned technical problem by following technological means：One kind has special teeth groove, arc
The multilayer electromagnetic shielding cabinet of shape notch, including foamed aluminium, electrical pure iron, silicon steel sheet, magnetic rivet, magnetic-conductive adhesive.The bubble
Foam aluminium, electrical pure iron, silicon steel sheet are all the materials of multilayer cabinet；The magnetic rivet is to ensure foamed aluminium, electrical pure iron, silicon steel
Piece is bonded each other, and entire combination is connected into cabinet, the magnetic-conductive adhesive with silicon steel sheet magnetic, ensures that magnetic is continuous.
Preferably：The foamed aluminium, electrical pure iron, silicon steel sheet be all it is seamless fit together, form rectangular cabinet.
Preferably：The cabinet outermost edge uses tooth slot structure, and cabinet corner is fabricated to zigzag tooth, makes cabinet side
Face, top surface are bonded completely with positive three faces and can not cause long gap without slot coupling.By so handling, make each laminate of cabinet
Between be more brought into close contact, effectively improve the electromagnetism continuity of cabinet, improve the electromagnetic shielding capability of cabinet.
Preferably：The thin layer rectangle silicon steel sheet that the cabinet internal layer designs because reducing vortex, it can equally use increase
The mode of teeth groove reduces the long gap of cabinet internal layer, to ensure the electromagnetism continuity of cabinet.
Preferably：Right-angled corner slit uses arc-shaped slot structure inside the cabinet, effectively reduces the slit of interface
Gap.
A kind of multilayer electromagnetic shielding cabinet based on above-mentioned special teeth groove, arc-shaped slot structure.
Using special teeth groove of the present utility model, the multilayer electromagnetic shielding cabinet of arc-shaped slot structure, using teeth groove, arc card
Slot structure reduces gap, more preferable compared to long gap electromagnetism continuity.Cabinet is combined using multiple material, including foamed aluminium, electrician
Pure iron, silicon steel sheet.By sandwich construction, the particularity of material and special gap processing mode, electricity can be effectively shielded
Magnetic field.It is very big compared to common cabinet, shield effectiveness.
The utility model advantage is：
(1) the cabinet shielding electromagnetic field made using foamed aluminium, electrical pure iron, silicon steel sheet, is protected electrical equipment, suppresses electricity
Magnetic radiation.New material foamed aluminium is applied in shielding cabinet first, and effectively shields electromagnetic field.
(2) cabinet edge is effective to reduce shadow of the gap to electromagnetic shielding using special teeth groove, arc-shaped slot structure
Ring.
(3) some blocks of silicon steel sheets are divided into cabinet internal layer, reduce eddy-current loss, ensure normal temperature rise.Use magnetic-conductive adhesive
Each block of silicon steel sheet is connected, ensures magnetic continuity.
Brief description of the drawings
Fig. 1 is electromagnetic shielding cabinet structural representation in the utility model.
Fig. 2 is electromagnetic shielding cabinet edge arc notch schematic diagram in the utility model.
Fig. 3 is electromagnetic shielding cabinet edge teeth slot structure schematic diagram in the utility model.
Fig. 4 is silicon steel sheet attachment structure schematic diagram in the utility model.
Fig. 5 is magnetic flux density observation station distribution map in the present invention.
Label in figure：1 is electrical pure iron, and 2 be foamed aluminium, and 3 be arc-shaped slot, and 4 be teeth groove, and 5 be silicon steel sheet, and 6 be magnetic conduction
Glue.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Based on the implementation in the utility model
Example, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is belonged to
The scope of the utility model protection.
As shown in figure 1, the utility model disclose it is a kind of have special teeth groove, the multilayer electromagnetic shielding cabinet of arc-shaped slot structure
Body, including electrical pure iron 1, foamed aluminium 2, arc-shaped slot 3, slot form 4, silicon steel sheet 5, magnetic-conductive adhesive 6；Several arc-shaped slots 3,
Teeth groove 4 is all distributed in electrical pure iron 1, foamed aluminium 2 makes the edge of cabinet.Silicon steel sheet 5 is distributed electrical pure iron 1, foamed aluminium 2 is made
Between making two plate interlayers of cabinet, it is brought into close contact with two plates.
Embodiment
As described in Fig. 1-4, this example discloses a kind of with special teeth groove, the multilayer electromagnetic shielding cabinet of arc-shaped slot structure
Body, and electromagnetic field caused by air reactor in power supply is controlled soon with this cabinet shielding EAST.Cabinet three ply board from outside to inside
Material therefor is respectively electrical pure iron, foamed aluminium, electrical pure iron.In order to weigh the shield effectiveness of different shielding measures, introduce
Magnetic field shielding Performance Coefficient.In emulation experiment, it is contemplated that the symmetry of model, choose 3 spaces of the outer diverse location of cabinet
In point as shown in figure 5, O points it is corresponding per existing cabinet geometric center point, each observation station is 0.2m apart from each face of cabinet,
By comparing the size in the magnetic field before shielding and the magnetic field after shielding, shield effectiveness is calculated.Wherein, observation station P1 is located at cabinet side
Side, P2 are located at cabinet front, and P3 is located at cabinet top.Shield effectiveness is expressed as：
Wherein, BbeforeThe free magnetic of physical surface observation station where cabinet is close, BafterIt is corresponding to use certain shielding measure
Afterwards, the magnetic of corresponding identical observation station is close, and SE refers to magnetic field shielding efficiency.
The magnetic flux density of observation station in the case of table 1 is unshielded
The magnetic flux density of observation station in the case of table 2 shields
It is respectively 0.1kHz, 1kHz, 10kHz, 20kHz, 30kHz to set excitation input current frequency, input current amplitude
Get the 1500A of maximum.The magnetic flux density of each observation station can be obtained by simulation calculation, as shown in table 1.Wherein, it is maximum
Magnetic flux density be 1.4886mT, minimum magnetic flux density is 0.457mT.The electromagnetic shielding cabinet of the utility model design is installed
Afterwards, the magnetic flux density of each observation station is as shown in table 2.Wherein, maximum magnetic flux density is 94.2uT, and minimum magnetic flux density is
0.25uT.Calculating on the front and rear magnetic flux density of shielding, the shield effectiveness of each point is calculated with reference to shield effectiveness expression formula
As shown in table 3.
The shield effectiveness of table 3
In summary, the multi-layer combined shielding mode formed using silicon steel sheet, electrical pure iron and foamed aluminium, and use
Special teeth groove, the structure of arc-shaped slot can be shielded effectively to existing low-frequency strong magnetic field.Using multilayer of the present utility model
Electromagnetic shielding cabinet body can effectively shield electromagnetic field, protect electrical equipment, suppress electromagnetic radiation.And cabinet internal layer is divided into
Some blocks of silicon steel sheets, eddy-current loss is reduced, ensures normal temperature rise.Using each block of silicon steel sheet of magnetic conduction gemel connection, ensure magnetic continuity.
It should be noted that herein, if being used merely in the presence of first and second or the like relational terms by one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Cover including for nonexcludability, so that process, method, article or equipment including a series of elements not only include those
Key element, but also other key elements including being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element in the process including the key element, method, article or equipment also be present.
Above example is only to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to foregoing reality
Example is applied the utility model is described in detail, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and model of various embodiments of the utility model technical scheme
Enclose.
Claims (5)
- A kind of 1. multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure, it is characterised in that：It is pure including electrician Iron, foamed aluminium, silicon steel sheet, magnetic rivet, magnetic-conductive adhesive；The foamed aluminium, electrical pure iron, silicon steel sheet are all the materials of multilayer cabinet Material；The magnetic rivet is to ensure that foamed aluminium, electrical pure iron, silicon steel sheet are bonded each other, and entire combination is into cabinet, the magnetic-conductive adhesive It is connected with silicon steel sheet magnetic, ensures that magnetic is continuous.
- 2. a kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure according to claim 1, it is special Sign is：The foamed aluminium, electrical pure iron, silicon steel sheet be all it is seamless fit together, form rectangular cabinet.
- 3. a kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure according to claim 1, it is special Sign is：The cabinet outermost edge uses tooth slot structure, and cabinet corner is fabricated to zigzag tooth, make cabinet side, top surface with The fitting completely of positive three faces can not cause long gap without slot coupling；By so handling, make closer between each laminate of cabinet Fitting, the electromagnetism continuity of cabinet is effectively improved, improve the electromagnetic shielding capability of cabinet.
- 4. a kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure according to claim 1, it is special Sign is：The thin layer rectangle silicon steel sheet that the cabinet internal layer designs because reducing vortex, it can equally use the side of increase teeth groove Formula reduces the long gap of cabinet internal layer, to ensure the electromagnetism continuity of cabinet.
- 5. a kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure according to claim 1, it is special Sign is：Right-angled corner slit uses arc-shaped slot structure inside the cabinet, effectively reduces the long gap of interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720586648.0U CN206728504U (en) | 2017-05-24 | 2017-05-24 | A kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720586648.0U CN206728504U (en) | 2017-05-24 | 2017-05-24 | A kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107018647A (en) * | 2017-05-24 | 2017-08-04 | 合肥工业大学 | A kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure |
| CN108761365A (en) * | 2018-04-11 | 2018-11-06 | 上海联影医疗科技有限公司 | Shielding case, the manufacturing method of shielding case, pet detector and system |
-
2017
- 2017-05-24 CN CN201720586648.0U patent/CN206728504U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107018647A (en) * | 2017-05-24 | 2017-08-04 | 合肥工业大学 | A kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure |
| CN107018647B (en) * | 2017-05-24 | 2024-02-13 | 合肥工业大学 | Multilayer electromagnetic shielding cabinet body with special tooth slot and arc clamping groove structure |
| CN108761365A (en) * | 2018-04-11 | 2018-11-06 | 上海联影医疗科技有限公司 | Shielding case, the manufacturing method of shielding case, pet detector and system |
| US10914850B2 (en) | 2018-04-11 | 2021-02-09 | Shanghai United Imaging Healthcare Co., Ltd. | Housing for shielding a sensor from a radiofrequency field and an imaiging system including the same |
| US11353605B2 (en) | 2018-04-11 | 2022-06-07 | Shanghai United Imaging Healthcare Co., Ltd. | Housing for shielding a sensor from a radiofrequency field and an imaging system including the same |
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