CN205443982U - Anti -electromagnetic radiation sound -screen baffle - Google Patents
Anti -electromagnetic radiation sound -screen baffle Download PDFInfo
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- CN205443982U CN205443982U CN201521089573.2U CN201521089573U CN205443982U CN 205443982 U CN205443982 U CN 205443982U CN 201521089573 U CN201521089573 U CN 201521089573U CN 205443982 U CN205443982 U CN 205443982U
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Abstract
The utility model provides an anti -electromagnetic radiation sound -screen baffle, include panel, backplate and be located the panel and backplate compound packing the within a definite time, panel and backplate are kept away from compound one side of filling and all are equipped with one deck electrostatic painting layer. The aluminum plate of panel for being equipped with a plurality of through -holes on the face, backplate are dull and stereotyped aluminum plate, the compound packing includes outside from noise damping layer, metal screen panel layer and the at least two -layer aluminium shield cover that sets gradually in to, position cavity in the aluminium shield cover. Adopt the utility model discloses a design, the panel plays preliminary noise proof effect towards sound and electromagnetic radiation source, the hole of panel, the compound packing because inside is equipped with the cavity, then row in the bilayer structure of cavity both sides is divided to the equal position of outside composite bed, rethread noise damping layer progressively falls and makes an uproar, then through metal screen panel layer and aluminium shielding layer respectively to electromagnetic radiation electrostatic shield carries out, magnetostatic shields and electromagnetic shield, the utility model has the advantages of simple structure, the effect is showing, is imbued with the practicality.
Description
Technical field
This utility model relates to a kind of sound barrier panel, is specifically related to a kind of anti-electromagnetic radiation sound barrier panel.
Background technology
Along with progress and the development in city of society, urban transportation has become as and our the most closely-related problem.It is the most convenient that the operation of magnetic suspension train brings to the trip of people, the most inevitably brings electromagnetic radiation simultaneously, and harm people's is healthy, causes disease.
Electromagnetic radiation is a kind of compound electromagnetic wave, transmits energy over time with orthogonal electric field and magnetic field.Human life activity comprises a series of bioelectric, and these bio electricities are very sensitive to the electromagnetic wave of environment, and therefore, human body can be impacted and damage by electromagnetic radiation.
The electromagnetic radiation harm to human body, shows as heat effect and non-thermal effect two broad aspect.
Heat effect: human body 70% is above water, by phase mutual friction after electromagenetic wave radiation, causes body to heat up, thus has influence on the normal work of intracorporeal organ.Body temperature raises and causes various symptoms, such as cardiopalmus, feeling of fullness in the head, insomnia, bradycardia, leukopenia, immunologic function degression, visual deterioration etc..Produce the electromagnetic wave power density of thermal effect at 10MW/CM2；Microcosmic thermal effect 1MW-MW/CM2；Shallow thermal effect is at below 10MW/CM2.As the microwave direct irradiation people that power is 1000W, can in several seconds causing death.
Non-thermal effect: the organ of human body and tissue all exist faint electromagnetic field, they are stable and orderly, are once disturbed by external electromagnetic field, and the weak electromagnetic field being in poised state will be destroyed, and human body is also subject to infringement.This is mainly the impact that low-frequency electromagnetic wave produces, after i.e. human body is irradiated by electromagnetic radiation, body temperature is the most significantly raised, but disturb the intrinsic weak electromagnetic field of human body, blood, lymph fluid and cellular plasm is made to change, human body is caused serious harm, may result in fetal anomaly or anemia of pregnant woman's spontaneous abortion；Affect the circulation of human body, immunity, reproduction and metabolic function etc..
Utility model content
Utility model purpose: this utility model solves existing sound barrier panel does not has the problem of concrete anti-electromagnetic radiation function, solves the problem preventing not have to propose for electromagnetic radiation difference sorting item simultaneously.
Technical scheme: for achieving the above object, this utility model offer techniques below scheme: a kind of anti-electromagnetic radiation sound barrier panel, including panel, backboard and be positioned between panel and backboard composite filled, described panel is the aluminium sheet that plate face is provided with some through holes, backboard is flat board aluminium sheet, described composite filled noise reduction layer, wire netting cap layer and at least two-layer aluminum radome including setting gradually from outside to inside, described aluminum radome is internal is cavity.
It is equipped with one layer of electrostatic enamelled coating away from composite filled one side as optimization, described panel and backboard.
As optimization, on described panel, the aperture of through hole is 1.5～3mm.
As optimization, described wire netting cap layer is mesh-like guard.
As optimization, described wire netting cap layer is copper/aluminum guard layer.
As optimization, described wire netting cap layer ground connection.
Beneficial effect: this utility model compared with prior art: prior art does not has the introduction of the anti-electromagnetic radiation sound barrier panel of molding, the application is by planning the classification of electromagnetic radiation, simultaneously according to the different types of inhomogeneous precautionary measures of electromagnetic radiation relative set, make to be applied to the bigger sound barrier panel of the noises such as high ferro circuit and can have the function of anti-electromagnetic radiation simultaneously concurrently, this utility model simple in construction, low cost, is imbued with practicality.
Accompanying drawing explanation
Fig. 1 is cross section structure schematic diagram of the present utility model；
Fig. 2 is the structural representation of this utility model panel；
Fig. 3 is that the sound barrier panel of prior art is for electromagnetic radiation decibel/frequency diagram；
Fig. 4 position uses sound barrier panel of the present utility model for electromagnetic radiation decibel/frequency diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment, it is further elucidated with this utility model, it should be understood that these embodiments are merely to illustrate this utility model rather than limit scope of the present utility model, after having read this utility model, those skilled in the art all fall within the application claims limited range to the amendment of the various equivalent form of values of the present utility model.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of anti-electromagnetic radiation sound barrier panel, including panel 1, backboard 2 and be positioned between panel 1 and backboard 2 composite filled, described panel 1 is the aluminium sheet that plate face is provided with some through holes 3, backboard is flat board aluminium sheet, described composite filled noise reduction layer 4, wire netting cap layer 5 and the two-layer aluminum radome 6 including setting gradually from outside to inside, described aluminum radome 6 is internal is cavity 8.Described noise reduction layer 4 is the silencing means such as existing muffler with metal shell or chip deafener.
Described panel 1 and backboard 2 are equipped with one layer of electrostatic enamelled coating 7 away from composite filled one side.
On described panel, the aperture of through hole 3 is 1.5～3mm.
Described wire netting cap layer 5 is mesh-like guard.
Described wire netting cap layer 5 is copper/aluminum guard layer.
Whether described panel 1 selects ground connection with backboard 2 also dependent on practical situation.
Described wire netting cap layer 5 ground connection.Ground connection is for can arrange according to practical situation herein, and grounded part is not shown.
We are specifically described and how to obtain conclusion of the present utility model below:
Electromagnetic radiation has been done in-depth study by this utility model, the Kelvin effect of the electromagnetic radiation of different frequency substantial amounts of test and research have been done, change frequency, change material, change the parameter such as thickness of material, obtain substantial amounts of test data, obtained by analysis and summary and shield curve accordingly.
Magnetic field barrier
Magnetic field can not be one not only have practical significance but also have the problem of theory significance by the shielding problem of armoured magnetic field as electric field in theory.According to the difference of condition, the shielding of electromagnetic field can be divided into electrostatic screen, magnetic shielding and three kinds of situations of electromagnetic shielding, and these three situation had both had the difference of matter, has again the contact of inherence, it is impossible to obscure.
Electrostatic screen:
Under state of electrostatic equilibrium, whether hollow conductor or solid conductor；No matter conductor itself is charged how much, or whether conductor is in external electric field, must be equipotentiality body, and its internal field intensity is zero, and this is the theoretical basis of electrostatic screen.Because the electric field in closing conductor shell has typical meaning and practical significance, as a example by our electric field in closing conductor shell, electrostatic screen is made some and discusses.
(1) close conductor shell internal electric field not affected by shell exterior charging or electric field.
As there being electric charge q in shell outside shell without electrical body, then electrostatic induction makes shell outer wall charged.Without electric field in shell during electrostatic equilibrium.This is not to say that shell exterior charging does not produce electric field, root generating field in shell.Owing to shell outer wall induces heterocharge, they are zero with the q conjunction field intensity that space any point excites in shell.Thus will not be affected by shell exterior charging q or other electric fields inside conductor shell.The charge inducing of shell outer wall has played autoregulation.If above-mentioned cavity conductor casing ground connection, then on shell, induced positive will flow into underground along earth lead.Cavity conductor and the earth equipotentiality after electrostatic equilibrium, in cavity, field intensity remains as zero.If there being electric charge in cavity, then cavity conductor still with ground equipotentiality, without electric field in conductor.At this moment there is contrary sign charge inducing because of cavity inner wall, therefore have electric field in cavity.This electric field is produced by electric charge in shell, shell exterior charging on shell internal electric field still without impact.
No matter from the foregoing discussion, it should be apparent that whether close conductor shell ground connection, internal electric field is not affected by shell exterior charging.
(2) ground connection closes conductor shell external electrical field is not affected by electric charge in shell.
As shell internal cavity has electric charge q, because electrostatic induction, shell inwall is with equivalent heterocharge, and shell outer wall is with the same class electric charge, and the shell external space is with the presence of electric field, and this electric field can be described as indirectly being produced by electric charge q in shell.Could also say that and directly produced by the outer charge inducing of shell.But if by the earthing of casing, then shell exterior charging will disappear, in shell, electric charge q and inwall charge inducing produce electric field outside shell is zero.Visible if it is desired that in shell electric charge on shell external electric field without impact, it is necessary to by the earthing of casing.These are different from the first situation.
Here it must also be noted that:
1. we say that ground connection will eliminate shell exterior charging, but are not to say that at any situation shell outer wall the most not charged.If there being electrical body outside shell, then shell outer wall still may be charged, regardless of whether whether have electric charge in shell.
2. in actual application, metal shell need not strictly completely enclose, and replaces metal shell also to can reach similar electrostatic shield effect with metal net mask, although this shielding is not completely, thoroughly.
3., when electrostatic equilibrium, earth lead is flow without electric charge, but if the electric charge in the shell shielded changes over, or the electric charge time to time change of the outer neighbouring electrical body of shell, will make earth lead has electric current.Radome is likely to residual charge occur, and at this moment shielding action will be again incomplete and halfway.
In a word, no matter whether closing conductor shell ground connection, internal electric field is not affected with electric field by shell exterior charging；Ground connection closes conductor shell external electric field not to be affected by electric charge in shell.This phenomenon, is electrostatic screen.Electrostatic screen have of both meaning:
First practical significance: shielding makes the instrument in metallic conductor shell or working environment not by external electric fields, external electrical field is not produced impact.Some electronic device or measurement equipment, in order to exempt interference, will carry out electrostatic screen, such as the metal net mask of the metal cap or closeer of ground connection, electron tube Can on indoor high pressure equipment cover.And for example make the mains transformer of all wave rectification or bridge rectifier, between armature winding and secondary windings, wrap foil or around last layer enamel-covered wire and be allowed to ground connection, reach shielding action.In high-voltage hot-line work, workman puts on and all forces to submit with what tinsel or conductive fiber were made into, and human body can play shielding protection effect.In electrostatic experiment, because there is the vertical electric field of about 100V/m near the earth.Get rid of the effect to electronics of this electric field, the motion the most under gravity of research electronics, then must there is eE ＜ meg, E ＜ 10-10V/m can be calculated, this be one almost without electrostatic field " electrostatic vacuum ", this only carries out electrostatic screen to evacuated cavity and could realize.It is true that be very effective by an electrostatic screen closing conductor cavity realization.
It two is theory significance: indirect verification Coulomb's law.Gauss theorem can be derived from Coulomb's law, if the inverse square index in Coulomb's law is not equal to 2 does not just reach Gauss theorem.Whereas if demonstrate Gauss theorem, turn out the correctness of Coulomb's law.According to Gauss theorem, the field intensity within insulated metal spherical shell should be zero, and this is also the conclusion of electrostatic screen.If detecting whether charged in shielding case with instrument, being analyzed just can determine that the correctness of Gauss theorem according to measurement result, the most just demonstrating the correctness of Coulomb's law.Nearest experimental result is that Williams et al. completed in 1971, it is indicated that in formula
In F=q1q2/r2 ± δ, δ ＜ (2.7 ± 3.1) × 10-16,
Visible in the experimental precision that present stage can reach, the inverse square relation of Coulomb's law is strict establishment.From the viewpoint of reality is applied, one can consider that it is correct.
Magnetic shielding:
Magnetostatic field is steady current or the magnetic field of permanent magnet generation.Magnetic shielding is to utilize the ferromagnetic material of high magnetic permeability μ to make radome to shield external magnetic field.It is similar from electrostatic screen effect and has different.
The principle of magnetic shielding can illustrate by the concept of magnetic circuit.As ferromagnetic material is made the loop in cross section, then in outside magnetic field, the most most magnetic field concentration is in ferromagnetic circuit.This can analyze with the air in cavity ferromagnetic material as parallel circuits.Because the pcrmeability of ferromagnetic material is more several thousand times larger than the pcrmeability of air, so the magnetic resistance of the magneto resistive ratio ferromagnetic material of cavity is much bigger, the exhausted major part of the magnetic induction line of external magnetic field will be passed through in ferromagnetic material wall, and the magnetic flux entering cavity is few.So, the cavity shielded by ferromagnetic material just there is no external magnetic field, thus reaches the purpose of magnetic shielding.The pcrmeability of material is the highest, and barrel is the thickest, and shield effectiveness is the most notable.Because commonly using pcrmeability high ferromagnetic material such as soft iron, silicon steel, permalloy does screen layer, therefore magnetic shielding is named again ferro-magnetic shield.Magnetic shielding has a wide range of applications in electronic device.The leakage magnetic flux that such as transformator or other coils produce can affect the focusing of electron beam in oscilloscope tube or image reproducer to the motion generation effect of electronics.In order to improve the quality of instrument or product, it is necessary to the parts producing leakage magnetic flux are carried out magnetic shielding.In wrist-watch, just can play demagnetizing effect with soft iron shell at core housing.
Indicated above, the effect of electrostatic screen is extraordinary.This is because the electrical conductivity of metallic conductor tens orders of magnitude bigger than the electrical conductivity of air, and the difference of the pcrmeability of ferromagnetic material and air only has several order of magnitude, the most several thousand times larger.So magnetic shielding some leakage field total.In order to reach more preferable shield effectiveness, multilayer screen can be used, the residual magnetic flux amount leaked in cavity is masked one after another.So respond well magnetic shield is the heaviest.But, if to manufacture absolute " magnetostatic vacuum ", then can utilize the Meisser effect of superconductor.Will be placed in external magnetic field by one piece of superconductor, its internal magnetic induction density B is zero forever.Superconductor is complete diamagnetic body, has optimal magnetic shielding effect, but at present can't be commonly used.
Electromagnetic shielding:
When electromagnetic field is propagated in conducting medium, the amplitude of its amount (E and H) is exponentially decayed with the increase of distance.From the viewpoint of energy, electromagnetic wave has energy loss when propagating in conducting medium, therefore, shows as the reduction of field amount amplitude.The field amount maximum of conductive surface, more gos deep into conductor, and field amount is the least.This phenomenon is also referred to as Kelvin effect.Utilize Kelvin effect that frequency electromagnetic waves can be stoped to penetrate good conductor and be made electromagnetic screen.It has more universal meaning than electrostatic, magnetic shielding.
Electromagnetic shielding is suppression interference, strengthens the reliability of equipment and improves the effective means of product quality.Reasonably use electromagnetic shielding, the interference of external frequency electromagnetic waves can be suppressed, it is also possible to avoid going to affect other equipment as interference source.As in radio, with aluminum radome outside coil, make it not be subject to the interference of extraneous time-varying field thus avoid noise.Audio frequency feeder line shielding line is also this reason.Oscilloscope tube iron sheet encloses, also for the scanning making stray EM field not affect electron ray.Also thoroughly do not go out metal-back at frequency electromagnetic waves produced by the element within metal shielding or equipment and external equipment will not be affected.
Claims (6)
1. an anti-electromagnetic radiation sound barrier panel, it is characterized in that: include panel, backboard and be positioned between panel and backboard composite filled, described panel is the aluminium sheet that plate face is provided with some through holes, backboard is flat board aluminium sheet, described composite filled noise reduction layer, wire netting cap layer and at least two-layer aluminum radome including setting gradually from outside to inside, described aluminum radome is internal is cavity.
Anti-electromagnetic radiation sound barrier panel the most according to claim 1, it is characterised in that: described panel and backboard are equipped with one layer of electrostatic enamelled coating away from composite filled one side.
Anti-electromagnetic radiation sound barrier panel the most according to claim 1, it is characterised in that: on described panel, the aperture of through hole is 1.5～3mm.
Anti-electromagnetic radiation sound barrier panel the most according to claim 1, it is characterised in that: described wire netting cap layer is mesh-like guard.
Anti-electromagnetic radiation sound barrier panel the most according to claim 1, it is characterised in that: described wire netting cap layer is copper/aluminum guard layer.
Anti-electromagnetic radiation sound barrier panel the most according to claim 1, it is characterised in that: described wire netting cap layer ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521089573.2U CN205443982U (en) | 2015-12-24 | 2015-12-24 | Anti -electromagnetic radiation sound -screen baffle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521089573.2U CN205443982U (en) | 2015-12-24 | 2015-12-24 | Anti -electromagnetic radiation sound -screen baffle |
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| CN205443982U true CN205443982U (en) | 2016-08-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401535A (en) * | 2015-12-24 | 2016-03-16 | 江苏远兴环保集团有限公司 | Anti-electromagnetic radiation noise barrier plate |
| CN106515461A (en) * | 2016-12-29 | 2017-03-22 | 中铁二院工程集团有限责任公司 | Collector shoe of magnetic suspension train and electromagnetic shielding method of magnetic suspension train |
| CN106896893A (en) * | 2017-02-21 | 2017-06-27 | 林敦 | Directly-heated tube multistage amplifier circuits |
| CN108573759A (en) * | 2018-05-21 | 2018-09-25 | 安徽双红机械制造有限公司 | A kind of compoboard for nuclear power neutron-absorbing |
-
2015
- 2015-12-24 CN CN201521089573.2U patent/CN205443982U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401535A (en) * | 2015-12-24 | 2016-03-16 | 江苏远兴环保集团有限公司 | Anti-electromagnetic radiation noise barrier plate |
| CN106515461A (en) * | 2016-12-29 | 2017-03-22 | 中铁二院工程集团有限责任公司 | Collector shoe of magnetic suspension train and electromagnetic shielding method of magnetic suspension train |
| CN106515461B (en) * | 2016-12-29 | 2023-09-22 | 中铁二院工程集团有限责任公司 | Magnetic levitation train collector shoe and magnetic levitation train electromagnetic shielding method |
| CN106896893A (en) * | 2017-02-21 | 2017-06-27 | 林敦 | Directly-heated tube multistage amplifier circuits |
| CN106896893B (en) * | 2017-02-21 | 2020-09-22 | 林敦 | Multistage amplifier circuit of directly-heated electron tube |
| CN108573759A (en) * | 2018-05-21 | 2018-09-25 | 安徽双红机械制造有限公司 | A kind of compoboard for nuclear power neutron-absorbing |
| CN108573759B (en) * | 2018-05-21 | 2020-01-10 | 安徽双红机械制造有限公司 | Combined plate for nuclear power neutron absorption |
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Granted publication date: 20160810 Termination date: 20201224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |