CN102647894B - Electromagnetic shielding device for signal line control circuit protector with power surge protector - Google Patents
Electromagnetic shielding device for signal line control circuit protector with power surge protector Download PDFInfo
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- CN102647894B CN102647894B CN201010109879.5A CN201010109879A CN102647894B CN 102647894 B CN102647894 B CN 102647894B CN 201010109879 A CN201010109879 A CN 201010109879A CN 102647894 B CN102647894 B CN 102647894B
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Abstract
The invention discloses an electromagnetic shielding device for a signal line control circuit protector with a power surge protector. The electromagnetic shielding device is characterized in that an inner shielding body with 1-5 layers and an outer shielding body are of a closed edge-free box structure; a power surge protector (SPD) is arranged between the inner shielding body and the outer shielding body made of low-carbon steel plates with the manufacturing thickness of 10mm; by virtue of the signal line control circuit protector (SPD), current inducted by a high-intensity magnetic field is prevented from entering the shielding bodies along a power supply and signal cable; the power surge protector (SPD) connected with a grounding conductor of the shielding bodies is in grounding or equipotential connection, high current which is instantaneously inducted on the surface of the shielding bodies in the high-intensity magnetic field is discharged, a non-conductive and non-magnetic fixing framework is used for fixing the inner and outer shielding bodies, wire inlet and outlet holes are in a corresponding relationship and are not on the same line, and outward push-and-pull doors are arranged on the side surfaces of the shielding bodies. The electromagnetic shielding device is novel in design, ingenious in combination and easy to mount, and the shielding requirements on the high/low frequency magnetic field are met.
Description
Technical field
The present invention relates to power source surge protector (SPD); Holding wire, control circuit protector (SPD); Electromagnetic screen.Refer in particular in a multilayer screen device between external shielding body, arrange power source surge protector (SPD); Arrange holding wire, control circuit protector (SPD); the high-intensity magnetic field stoping electromagnetic pulse weapon blast to produce enters in shield along the electric current that power supply, signal cable induce; external shielding body and power source surge protector (SPD) in earth lead connects; by ground connection or equipotential link, bleed off the huge current flow that strong-electromagnetic field induces instantaneously on interior external shielding body surface.
Background technology
Electromagnetic pulse (EMP) is the weakness utilizing the intrinsic electromagnetic property of parts in electronic system, can make a large amount of electronic equipments and electronic system paralysis instantaneously or destroyed.
One, electromagnetic pulse classification
1, the electromagnetic pulse that nuclear explosion produces is called that nuclear electromagnetic pulse nuclear electromagnetic pulse (HEMP) is the electromagnetic pulse exciting ionized atmosphere to produce by the gamma-rays of the overhead nuclear explosion generation of 30 ~ 500km, therefore also becomes high-altitude electromagnetic pulse.The amplitude of HEMP depends on the equivalent of nuclear explosion, what this pulse rose to peak value from 011 of peak value 019 only needs 5ns, and the time required for half dropping to peak value from top is about 200ns, therefore its frequency spectrum covered is very wide, almost flat from 10kHz ~ 1MHz, reduce from 1 ~ 100MHz HEMP peak electric field high, rise time ground areas that is fast, that cover that nuclear explosion in high altitude produces gradually wide, can millions of square kilometres geographically produce very strong HEMP (electric field strength 50 ~ 100kV/m).(list of references " airplane design " in October, 2008; Article is numbered: 1673-4599 (2008) 05-0059-03)
2, NON-NUCLEAR ELECTROMAGNETIC PULSE (EMP) then utilizes the energy that explosive charge or chemical fuel burning produce, high power microwave radiation energy is converted to by microwave device, can emission peak power more than gigawatt, frequency is the pulse microwave bundle of 1 gigahertz (GHZ) ~ 300 gigahertz (GHZ), exposed electric conductor (such as exposed electric wire, the track of printed circuit board (PCB)) sharply produces the transient voltage of thousands of volt, a large amount of electronic equipment is caused to the damage that cannot retrieve.
3, Lightning Electromagnetic Pulse (LEMP) is the powerful lightning stream as interference source that produces when thundering of sky and electromagnetic field thereof.Its induction range is very large, all can have harm in various degree to computer and communication commanding system and various electric equipment and pipeline.
Two, the feature of electromagnetic pulse weapon: electromagnetic pulse weapon, as a kind of new concept weapon, compared with traditional weapon, in general principle, kills and wounds in destructive power and the mode of operation etc. and has remarkable difference.Its unique distinction is also:
1, target kill is polynary: electromagnetic pulse weapon can disturb and destroy nearly all electronic equipment such as aircraft, radar, computer, phone and mobile phone etc. in the tens of km of radius.The strong electromagnetic pulse given off can also produce induced current by being exposed to ground antenna, creeps into underground always, destroys various hidden electronic equipment in underground installation.
2, cost effectiveness is high: EMP bomb is with low cost, manufactures one piece of common compact electromagnetic pulse bomb and only needs hundreds of dollar, far below conventional bomb.And carry one piece of EMP/T Bomb with cruise missile, only a sortie need be set out, just multiple target can be hit simultaneously.
3, flat pad is various: generally using the carrier that aircraft, naval vessels are thrown as electromagnetic pulse weapon delivery, also can with large caliber gun or rocket launching.U.S. Air Force Project all loads onto EMP bomb to bomber, fighter plane, cruise missile and drone.
4, there are soft, hard two kinds of killing abilities: both can implement electronic jamming to the command and control system of enemy, radar system, communication apparatus, make its detection, control and communication equipment blinding, cause deaf, cause mute, also timing, fixed point ground can give the radar system of enemy, communication equipment etc. are with fatal destruction.
5, tactics, strategic purpose can be reached: tactics type EMP bomb mainly carries out clearly, targetedly attacking to some fixed targets, and target selection has popularity, and tactics application has flexibility.Strategy type EMP bomb is mainly for enemy state's strategic objective, and as implemented the bombing of high strength to capital, industrial important city etc., the commander causing the other side of overall importance paralysis, message interrupts, destroy enemy state and produce normally and live, apply huge psychological pressure to the common people.(list of references: " aerospace electronic warfare " the 22nd volume the 6th phase, middle figure classification number: TN974; TJ864, file identification code: A)
6, be also huge to the strike of consumer electronic device: savings and Accounting system are all paralysed, and phone, mobile phone are silent, and traffic lights are malfunctioning, and air line can not run ... all could paralyse in the city of country ownership! Suffer the country that this hits, before 200 years being got back to overnight! (list of references: www.china.com's military channel " U.S. 2012 comprehensively equipment pulse weapon get the jump on Sino-Russian before "
Three, four aspects of Spark gap
1, shield: shielding is the transmission utilizing shield to stop or reduce electromagnetic energy, reaches a kind of important means of electromagnetic protection, and this shield does not allow electromagnetic field arrive protected equipment.But all electronic equipments all will obtain electric power, also all will communicate with the external world, these inlet points are that the entering of electrical transients process of High energy electromagnetic weapon provides chance.
2, grounding is connected with the earth by suitable method and access by electronic equipment, to improve the stability of electronic device circuitry system works, effectively suppress the impact of external electromagnetic field, avoid the too much guiding discharge of casing charge accumulated and the interference caused and damage.
3, filter: filter passive or active device can form selective network by resistance, inductance, electric capacity one class, to stop all the other compositions outside useful band to pass through, completes filter action; Also can be made up of ferrite one class lossy material, by it, undesirable frequency content be sponged, reach the effect of filtering.(list of references: " space electronic technology " the 3rd phase < electromagnetic pulse weapon principles in 2004 and protection > thereof)
4, technical safeguard: U.S. army has used a kind of lightning arrester with wire now, can effectively reduce the interfering energy of strong electromagnetic pulse.(figure classification number in < marine electronic engineering >2004 the 24th volume " Military Electronic Equipment is for the protection of strong electromagnetic pulse ": 0441.4)
Five, the serial surge filtering product technology of SINETAMER (hereinafter referred to as S series of products) produced in USA is introduced
S series of products are the purification of world-leading electric power, precision instrument protection, power surge filtering protection product.The patented technology of its sinusoidal wave tracking filter and special chemical encapsulation, comprises surge protection and filtering technique, meets very much the technical requirement of Spark gap.US military is at ground force, naval, the army of air force and frontier guards extensive use S series surge filtering protection product, and S series surge filtering protection product has following advantage:
1, multistage protection mechanism, residual voltage can reach the surge voltage of 0V through water conservancy diversion generally between 2.5KV ~ 15KV, and the SPD product be equipped with after multistage protection, should reach extremely low residual voltage, and special industry can reach 0 volt.The general surge protection product in market, maximum through-flow 40KA, GB residual voltage value is 1800.S product 40KA impacts, and residual voltage value is less than 600V.Residual voltage is less, and protected effect is better.Under 8/20us simulates thunder and lightning test environment, charging voltage 24.9KV, current peak 47.8KA, residual voltage value 551V, much smaller than home products standard.
2, response speed was less than for 1 nanosecond, effectively protection secondary thunder, induced lightening and and electrically the inside Transient Voltage Suppressor that shoves be called for short TVS.The TVS diode response time was less than for 1 nanosecond.The piezo-resistance response speed that other surge protection product adopts was 25 nanoseconds.TVS advantage: bidirectional protective characteristic, response speed fast (nanosecond order), absorb surge power large (transient power reaches thousands of watts), clamping voltage is easy to control, leakage current is low, little without damage limit, volume.
3, shell adopts NEMA 4 standard, waterproof, fire prevention, explosion-proof, antistatic.
4, the sinusoidal wave ORN tracking technique of patent, accurately eliminates surge, humorous wave energy.Traditional product adopts to descend traditionally the filtering of clamp-type threshold values, and pressure-sensitive characteristic is the conducting over the ground when voltage reaches threshold values, thus reaches the object of leakage current.S product adopts the sinusoidal wave tracking filter of patented technology enhancement mode ORN, by the positive and negative excursion percentage of certain sine wave, follow the tracks of and eliminate surge " stolen goods electricity ", purification power utilization environment, and residual voltage value is very low.In computer communication system, electronic equipment, electromagnetic pulse by conductive lines in circuit, in the energy conduction to equipment of product overvoltage in the line thus interference, damage equipment.During conductive lines, energy shows as overvoltage.ORN filtering technique, resist scope by tracking technique filtering voltage, the power supply of guarantee, " cleaning " of signal, make computer system, electronic equipment etc. avoid interference and the damage of electromagnetic pulse.
5, unique chemistry encapsulation patented technology, ensure the voltage tester of the unfailing performance 500V that device is lasting, do not have MOV48 temperature second of chemical packaging protection to rise to 200 DEG C, the test continued can make MOV blast at short notice.And after special chemical encapsulation, the voltage tester of 500V, the MOV 3 points of 30 seconds temperature through chemical packaging protection remain on 105 DEG C, and remain on a little temperature always.And special chemistry is closed, the heat produced in surge process can be absorbed rapidly, protection product components and parts, extend device useful life.In EMP Coupling process, energy is very large, requires also very high to the electronic component device of filter apparatus.And the special chemical of S product is closed, shift energy by distribute heat, ensure that the useful life of components and parts, thus system safety is dared in protection.
6, real 10 moulds (full mould) protection, blocks surge institute likely passage.For military equipment, require to carry out filtering protection between the lines.The full mould protection of S product, has blocked line and line, all possible passage of line and ground, thus has played perfect protection to equipment.
7, diversification module is mixed, hot, electric dual fail-safe fusing capacitor design.
8, uniquely earth-free surge protection product X product can adopt the sinusoidal wave tracking technique of patent, special chemical encapsulates, and nanosecond TVS element, and ten moulds protections and mixing diversification module, make S product can not be released energy by ground connection.Because full mould is protected, totally 70 MOV, the energy Ratios that every block MOV shares is less.When outside does not have ground connection, MOV, when absorbing surge, can discharge the energy of surge by the heating of self.And special chemistry encapsulation, the heat that MOV produces can be absorbed rapidly, ensure MOV components and parts.Thus make product can carry out fault offset in unearthed situation.S product can not ground connection time, require that ground wire does equipotential link.In mobile device in military communication system, the character due to movement determines equipment ground system will be perfect not to the utmost.And traditional surge filtering product all needs the ground connection of high request.S product can accomplish that in earth-free situation surge filtering is protected, and more adapts to army's maneuver warfare requirement.(list of references: ECS company of the U.S. " SINETAMER series of products specification ")
Six, the equipment situation of army of various countries electromagnetic pulse weapon
Septic yanks are comprehensive equipment pulse weapon in 2012, get the jump on Sino-Russian before.2004, U.S. army started to carry out extensive testing to electromagnetic pulse weapon of new generation, and the electromagnetic pulse weapon cost planning to involve great expense the most at present is down to about 400 dollars.(list of references: www.china.com's military channel " U.S. 2012 comprehensively equipment pulse weapon get the jump on Sino-Russian before ")
Seven, the kind of electromagnetic shielding
1, frequency electromagnetic waves shielding, main employing absorbs and principle of reflection, and frequency electromagnetic waves, when running into metal shield, produces strong eddy current effect and electromagnetic wave is absorbed, and simultaneously because its wave impedance is very high, frequency electromagnetic waves produces reflection loss.
2, shielding in of magnetostatic field: when magnetic field is by a closed high magnetic conduction shield, because the permeability of shield is very high, magnetic resistance is very low, and magnetic field can be derived by magnetic screen path, and the magnetic field of the shield that makes to bleed significantly is reduced.
3, SLF electromagnetic shielding, mainly based on magnetic shielding principle, will consider electromagnetic compatibility simultaneously, also has the shielding action that partial vortices effect produces.
Eight, the principle of electromagnetic shielding and choosing of shield manufactured materials
Low frequency electromagnetic Bob frequency electromagnetic waves has higher magnetic-field component.For low-down interfering frequency, the permeability of shielding material is more than even more important during high frequency.The general principle of shielding low frequency (as power frequency) electromagnetic interference is magnetic path parallel connection by-pass shunt.Magnetic bypass is provided to reduce the magnetic flux density of shield inside by using permeability magnetic material (as mild steel, silicon steel etc.).Increase eddy current loss simultaneously as far as possible, make part energy be converted into thermal energy consumption and fall.The thicker then magnetic resistance of shielding material is less, eddy current loss is larger, and shield effectiveness is better.Conductance is high and the material (as copper, aluminium etc.) that permeability is low does not almost have shielding action magnetic permeability also relevant with applied field strengths to electromagnetic magnetic-field component, when applied field strengths is lower, magnetic permeability raises with the increase of externally-applied magnetic field, when applied field strengths exceedes certain value, magnetic permeability sharply declines, at this moment claim material to there occurs saturated, material, once occur saturated, just loses magnetic screening action.The magnetic permeability of material is higher, more saturated.Therefore, in very strong magnetic field, the screening effectiveness that the material that magnetic permeability is very high is not good.
The magnetic permeability of mild steel is about 4000, and saturation intensity is about 22000, good, the easy processing of low carbon steel plate good mechanical property, solderability, not easily saturated, is the first-selection of low frequency electromagnetic shielding material, utilizes the screening effectiveness that acquisition that mild steel can be cheap is satisfied.
The deficiencies in the prior art part
Closed shield, it has structure feature simple, easily manufactured, with low cost, weak point is 1, at present, common super low frequency electromagnet shielding device is single layer structure (is exactly adopt individual layer Alperm to form one: 1, shielding factor is low, generally at 20 ~ 30dB; 2, can not the shielding of simultaneously compatible high-intensity magnetic field and low-intensity magnetic field; 3, outside screen is exposed to, be easily subject to impacting, colliding and cause the reduction of screening effectiveness (when Alperm is subject to impacting, magnetic permeability can decline); Therefore, the super low frequency electromagnet shielding device of this single layer structure, (electromagnetic shielding coefficient is at 20 ~ 30dB to be only applicable to the lower place of shielding requirements; Electromagnetic shielding coefficient is higher, and the shielding requirements of instrument and equipment is tighter), and for the higher place (electromagnetic shielding coefficient is at 75 ~ 90dB) of shielding requirements, be in general irrealizable.Even if it is also undesirable that shield thickeies shield effectiveness.
2, in three (shielding, ground connection, filtering) major measure of tempest, shielding is adopted can not to provide complete Spark gap often merely, because the cable in equipment or system is that the most effective electromagnetic pulse receives and transmitting antenna.Especially to the equipment having external antenna, and the system that multiple devices are connected to form by cable, simple shielding cannot reach requirement of shelter.A kind of effective measures add filter exactly, cut off the path that nuclear electromagnetic pulse is propagated along holding wire or power line, jointly form perfect nuclear electromagnetic pulse protect with shielding.Filtering is to prevent undesirable electromagnetic viscosimeter from propagating into equipment along any aerial lug be connected with equipment, generally having been come by filter.Filter is adopted to suppress NEMP to be one of necessary means of nuclear electromagnetic pulse protection.Particularly to suppressing through conductive lines to the energy in circuit, it is a kind of extensive adopted method.
In the earth lead of 3, existing single or multiple lift electromagnetic screen; do not install power source surge protector (SPD) additional; after electromagnetic pulse weapon blast; the highfield produced and high-intensity magnetic field can on earth leads; induce several kilovolts of electric currents trained to a little Wan An to the voltages of several ten thousand volts and a few kiloampere, this electric current enters in shield along the gap of earth lead shield.
Summary of the invention
The present invention is the electromagnetic screen designing a kind of charged Surge Protector holding wire control circuit protector, it adopts the casing sandwich construction without corner angle, in a multilayer screen device portal place between external shielding body, installation power source surge protector (SPD), the electric current stoping high-intensity magnetic field to induce enter in shield along cable; Holding wire, control circuit protector (SPD) are installed; stop in disturbing wave entering signal line cable; the power source surge protector (SPD) be connected with shield earth lead; by ground connection or equipotential link, bleed off the huge current flow that strong-electromagnetic field induces instantaneously on screening arrangement surface.For the automation operational chain of command of military computer composition and the electromagnetic shielding of communication system.
The technical scheme that the present invention solves the employing of its technical problem is: screening arrangement is by outer shield (1), internal layer shield (2), the first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) (8), second source Surge Protector (SPD) (9), 3rd power source surge protector (10), first earth lead (17) and the second earth lead (18) composition, shield shape is rectangle (long 5m, wide 40m, high 3m) without corner angle, closed body structure, shield side has 1 ~ 2 dodge gate (14) to adopt 3 ~ 9 hinges (12) to be connected with outer shield (1), dodge gate (14) is shut and is fastened with 3 ~ 9 locks (13), outer dodge gate (14) point outer (16), internal layer (15), the quantity of internal layer (15) is 1 ~ 5 layer, internal layer (15), the joint portion of outer (16) will with external shielding body (1), internal layer shield (2) is occlusion also overlapping 10 ~ 50mm closely, outer shield (1) and internal layer shield (2) are by the manufacture of thickness 10mm low carbon steel plate, internal layer shield (2) is 1 ~ 5 layer, spacing 70 ~ 120mm is with welding, shield made by riveting method steel plate, when welding stitching portion, welding inserts is done with shielding material masterbatch, the shielding material overlap 10 ~ 30mm of stitching portion, outer shield (1) has the first hole (4) that 1 ~ 8 is installed into outlet, the air inlet of 1 diameter 50mm, the gas outlet of 1 diameter 50mm, the cable of 1 diameter 20mm is imported and exported, the holding wire of 1 diameter 20mm is imported and exported, internal layer shield (2) has the second hole (5) that 1 ~ 8 is installed into outlet, the air inlet of 1 diameter 50mm, the gas outlet of 1 diameter 50mm, the cable of 1 diameter 20mm is imported and exported, the holding wire of 1 diameter 20mm is imported and exported, first hole (4) does not become corresponding relation point-blank with the second hole (5), with bend to 30 ° ~ 360 ° or N number of 360 ° spiral-shaped, or bend to the steel pipe of S shape, also can the shielding steel pipe (20) of the long 300mm of 90-degree bent, as the screening arrangement of turnover wire first hole (4), can be soldered on outer shield (1), put thread also can to outer shield (1) and shielding steel pipe (20) to tighten, each first hole (4) joins 1 shielding steel pipe (20), dielectric skeleton (3) between outer shield (1) and internal layer shield (2) is made up (the wide 60mm quantity of high 100mm 12) of non-conductive and non-magnetic plastics, identical with shield length with the parallel installation length in shield base, fix with first screw (6) of long 20 ~ 30mm from inside to outside at internal layer shield (2), fix at second screw (11) of the long 20 ~ 30mm of outer shield (1) ecto-entad, first screw (6) and the second screw (11) stagger installation, and not point-blank, not on a side, screw shielding material masterbatch manufactures, welding inserts is done with covering material masterbatch, the cap nut of first screw (6) of ectonexine shield and the second screw (11) is welded, between outer shield (1) and internal layer shield (2), 1 ~ 9 the first power source surge protector (SPD) (7) is installed, the each interface of three-phase electricity connects 1, with the cable series connection or in parallel entering outer shield (1) and internal layer shield (2), 1 ~ 9 holding wire, control circuit protector (SPD) (8) are installed between outer shield (1) and internal layer shield (2) connect with the signal wires entering outer shield (1) and internal layer shield (2), first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) (8) are arranged on distance doorway place 50 ~ 200mm so that maintenance and replacing, with the 3rd screw (19) the first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) (8) are fixed on internal layer shield (2), 3rd screw (19) is welded on the outer surface of internal layer shield (2), also can the first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) 8 are arranged in the second hole (5) outward, distance the second hole (5) 50mm ~ 300mm is fixed on the outer surface of internal layer shield (2) with the 3rd screw (19), or the first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) (8) are arranged in second hole (5) of internal layer shield (2), the inner surface of internal layer shield (2) is fixed on the 3rd screw (19), 1 second source Surge Protector (SPD) (9) is connected with outer shield (1), and be connected with 1 the second earth lead (18), 1 the 3rd power source surge protector (SPD) (10) are connected with internal layer shield (2) and are connected with 1 the first earth lead (17), first earth lead (17) and the second earth lead (18) are cannot can do equipotential link during ground connection, second source Surge Protector (SPD) (9), 3rd power source surge protector (SPD) (10) and the first earth lead (17), the connected mode of the second earth lead (18) is serial or parallel connection.
One or more the first power source surge protector (SPD) (7), be arranged in the inside of outer shield (1), in parallel with the cable entered or be connected in series.
One or more holding wires, control circuit protector (SPD) (8), be arranged in the inside of outer shield (1), be connected in series with the signal line cable entered.
One or more the first power source surge protector (SPD) (7); be arranged in the outside of the inside of outer shield (1), internal layer shield (2); in parallel with the cable entered or be connected in series; with the 3rd fixed screw (19), the first power source surge protector (SPD) (7) are fixed on the outer surface of internal layer shield (2), the 3rd fixed screw (19) welds or is screwed on internal layer shield (2) with thread.
One or more holding wires, control circuit protector (SPD) (8); be arranged in the outside of the inside of outer shield (1), internal layer shield (2); connect with the signal line cable entered; with the 3rd screw (19), holding wire, control circuit protector (SPD) (8) are fixed on the outer surface of internal layer shield (2), the 3rd screw (19) welds or is screwed on internal layer shield (2) with thread.
One or more second source Surge Protector (SPD) (9) are connected with the second earth lead (18); be arranged in the outer surface of outer shield (1), in parallel with the second earth lead (18) or be connected in series.
One or more the 3rd power source surge protector (SPD) (10) are connected with the first earth lead (17); be arranged in the inside of outer shield (1); the outside of internal layer shield (2); in parallel with the first earth lead (17) or be connected in series; with the 3rd screw (19) the first power source surge protector (SPD) (7); be fixed on the outer surface of internal layer shield (2), the 3rd screw (19) welds or is screwed on internal layer shield (2) with thread.
Have multiple skeleton (3) to be made by non-conductive and non-magnetic nonmetallic materials between outer shield (1), internal layer shield (2), length is equal with shield, installation parallel with shield base.
Outer shield (1) there is multiple the first hole (4) being installed into outlet, internal layer shield (2) there is multiple the second hole (5) being installed into outlet, first hole (4) and the second hole (5) are not point-blank, not in one plane, and become corresponding relation.
First power source surge protector (SPD) (7); Holding wire, control circuit protector (SPD) (8) are arranged in the second hole (5) outer distance hole (5) 50mm ~ 300mm, the outer surface of internal layer shield (2) is fixed on the 3rd screw (19), or the first power source surge protector (SPD) (7); Holding wire, control circuit protector (SPD) (8) are arranged in the interior inner surface being fixed on internal layer shield (2) with the 3rd screw (19) in the second hole (5) of internal layer shield (2).
The invention has the beneficial effects as follows: novel in design, structure is ingenious, it is simple, with low cost, easy to use to make, effectiveness is good, is applicable to army's motorization operational need.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the present invention is further described
Fig. 1 is structural representation of the present invention;
Fig. 2 is the front schematic view of outer dodge gate (14);
Fig. 3 is the end view of Fig. 2;
Fig. 4 is that internal layer shield is connected profile with outer shield;
Fig. 5 is the structure chart of the 3rd screw (19) and internal layer shield (2);
Fig. 6 is first hole (4) of external shielding body (1) and the connection layout of shielding steel pipe (20).
In figure: 1. outer shield; 2. internal layer shield; 3. skeleton; 4. the first hole; 5. the second hole; 6. the first screw; 7. the first power source surge protector; 8. holding wire, control circuit protector; 9. second source Surge Protector; 10. the 3rd power source surge protector; 11. second screws; 12. hinges; 13. locks; 14. outer dodge gates; 15. internal layers; 16. is outer; 17. first earth leads; 18, the second earth lead; 19. the 3rd screws; 20. shielding steel pipes.
Specific embodiments
Beijing precision instrument proterctive equipment company implements the present invention program, for a kind of electromagnetic shielding of communication commanding system, the electromagnetic screen of charged Surge Protector holding wire control circuit protector provided by the invention, is characterized in that: screening arrangement installs power source surge protector (SPD) 7 by outer shield 1, internal layer shield 2, power supply; Holding wire, control circuit protector (SPD) 8; The power source surge protector (SPD) 9,10 be connected with shield earth lead 17,18 forms.Shield shape is that rectangle (long 5m, wide 4m, high 3m) is without corner angle, closed body structure.Shield side has dodge gate 14 (N=1) to adopt hinge 12 (N=3) to be connected with outer shield 1, and the inlet/outlet for protected equipment is shut and tightly fastened with lock 13 (N=3).Outer dodge gate 14 points of double-layer structure internal layers 15 and skin 16,15,16 joint portions will closely be engaged and overlapping 10 ~ 50mm with shield 1,2, in case magnetic field impulse ripple enters.Outer shield 1 (can be used as the shell use of shield by the low carbon steel plate manufacture of the conductive magneto-conductive of thickness 10mm, shielding action is played to high-intensity magnetic field), inner side shield 2 is by the low carbon steel plate manufacture of thickness 10mm conductive magneto-conductive, internal layer shield 2 (N=1 layer), play the electric field magnetic field that continuation shielding shield 1 does not shield, shield 1 and shield 2 spacing=70-120mm are with welding, low carbon steel plate is made into shield by riveting method, when welding stitching portion, welding inserts is done with shielding material masterbatch, the hole 4 (N=4) of the line installation of shielding material overlap 10 ~ 30mm. outer shield body 1 of stitching portion, 1 air inlet (diameter 50mm), 1 gas outlet (diameter 50mm), cable is imported and exported 1 (diameter 20mm), holding wire is imported and exported 1 (diameter 20mm), the hole place shielding process in addition at hole 4, 1, the hole 5 (N=4) air inlet (diameter 50mm) of the line installation of inner shield body 2, 1 gas outlet (diameter 50mm), cable is imported and exported 1 (diameter 20mm), holding wire is imported and exported 1 (diameter 20mm).For preventing high-frequency electromagnetic pulse from penetrating, hole 4 and hole 5, not on a side, become corresponding relation not point-blank.With the steel pipe of the long 300mm of the 90-degree bent shielding steel pipe 20 as turnover wire hole 4, all kinds of wire is facilitated to pass in and out, the millimeter electromagnetic wave preventing wavelength short enters in shield 1 along hole 4, shielding steel pipe 20 to can be soldered in shielding 1 and also can put thread to shield 1 and shielding steel pipe 20 and be tightened on shield 1, and a shielding steel pipe 20 is joined at each hole 4.Between shield 1 shield 1 skeleton 3 by non-conductive and not magnetic conduction (prevent the electric current that strong electromagnetic pulse produces on shield 1, be transmitted on shield 2 by the skeleton 3 of conduction, and on shield 2, induce highfield and magnetic field) engineering plastics make the wide 60mm of (N=12 root) high 100mm) installation parallel with shield base, length identical with shield length (the wide 60mm of high 100mm).Screw 6 in shield 2 inside from inside to outside with long 20 ~ 30mm is fixed, fix at the screw 11 of the long 20 ~ 30mm of the outside ecto-entad of shield 1, screw 6 and 11 staggers installation, and not point-blank, screw 6,11 shielding material masterbatch manufactures, doing welding inserts with covering material masterbatch, the cap nut of the screw 6 and 11 of interior external shielding body being welded, preventing magnetic dispersion from entering.Power source surge protector (SPD) 7 (N=1 ~ 3) three-phase electricity every root line is installed and connects 1, in parallel or be installed in series, be arranged between shield 1 and 2; Holding wire is installed, control circuit protector (SPD) 8 (N=1) is installed in series with the signal line cable entered in shield, be arranged between shield 1 and 2.Power source surge protector (SPD) 7, holding wire, control circuit protector (SPD) 8; be arranged on distance doorway place 50 ~ 200mm so that maintenance and replacing; be fixed on shield outer surface 2 with fixed screw 19, fixed screw 19 be welded on the outer surface of shield 2.Power source surge protector (SPD) 9 (N=1) is connected with outer shield 1, and is connected with earth lead 18 (N=1), and the electric current gone out at shield surface induction is imported the earth; Power source surge protector (SPD) 10 (N=1) is connected with outer shield 2 and is connected with earth lead 17 (N=1); the electric current gone out at shield 2 surface induction is imported the earth; earth lead 17,18 cannot ground connection time; equipotential link can be done and reach by power source surge protector (SPD) 9,10 heating the object consuming electric energy, with fixed screw 19, power source surge protector (SPD) 10 is fixed on the outer surface of shield 2. the connected mode of power source surge protector (SPD) 9,10 and earth lead 17,18 is serial or parallel connections.
The present invention has reasonable in design, easy to manufacture, easy to install and use, that effectiveness is good feature, measured data reaches ultralow frequency (0 ~ 300HZ frequency range), the technical requirement (see table one) of height shielding (shielding factor reaches 75 ~ 90dB) of magnetic interference, meets the electromagnetic shielding requirements of the high-end products such as ultralow frequency device sensitivity measurement.
The measured data table one of electromagnetic screen
Claims (10)
1. the electromagnetic screen of charged Surge Protector holding wire control circuit protector, is characterized in that: screening arrangement is by outer shield (1), internal layer shield (2), the first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) (8), second source Surge Protector (SPD) (9), 3rd power source surge protector (10), first earth lead (17) and the second earth lead (18) composition, shield shape is the long 5m of rectangle, wide 4m, high 3m is without corner angle, closed body structure, shield side has 1 ~ 2 dodge gate (14) to adopt 3 ~ 9 hinges (12) to be connected with outer shield (1), dodge gate (14) is shut and is fastened with 3 ~ 9 locks (13), outer dodge gate (14) point outer (16), internal layer (15), the quantity of internal layer (15) is 1 ~ 5 layer, internal layer (15), the joint portion of outer (16) will with external shielding body (1), internal layer shield (2) is occlusion also overlapping 10 ~ 50mm closely, outer shield (1) and internal layer shield (2) are by the manufacture of thickness 10mm low carbon steel plate, internal layer shield (2) is 1 ~ 5 layer, spacing 70 ~ 120mm is with welding, shield made by riveting method steel plate, when welding stitching portion, welding inserts is done with shielding material masterbatch, the shielding material overlap 10 ~ 30mm of stitching portion, outer shield (1) has the first hole (4) that 1 ~ 8 is installed into outlet, the air inlet of 1 diameter 50mm, the gas outlet of 1 diameter 50mm, the cable of 1 diameter 20mm is imported and exported, the holding wire of 1 diameter 20mm is imported and exported, internal layer shield (2) has the second hole (5) that 1 ~ 8 is installed into outlet, the air inlet of 1 diameter 50mm, the gas outlet of 1 diameter 50mm, the cable of 1 diameter 20mm is imported and exported, the holding wire of 1 diameter 20mm is imported and exported, first hole (4) does not become corresponding relation point-blank with the second hole (5), with bend to 30 ° ~ 360 ° or N number of 360 ° spiral-shaped, or bend to the steel pipe of S shape, also can the shielding steel pipe (20) of the long 300mm of 90-degree bent, as the screening arrangement of turnover wire first hole (4), can be soldered on outer shield (1), put thread also can to outer shield (1) and shielding steel pipe (20) to tighten, each first hole (4) joins 1 shielding steel pipe (20), dielectric skeleton (3) between outer shield (1) and internal layer shield (2) makes the wide 60mm quantity of high 100mm 12 by non-conductive and non-magnetic plastics, identical with shield length with the parallel installation length in shield base, fix with first screw (6) of long 20 ~ 30mm from inside to outside at internal layer shield (2), fix at second screw (11) of the long 20 ~ 30mm of outer shield (1) ecto-entad, first screw (6) and the second screw (11) stagger installation, and not point-blank, not on a side, screw shielding material masterbatch manufactures, welding inserts is done with covering material masterbatch, the cap nut of first screw (6) of ectonexine shield and the second screw (11) is welded, between outer shield (1) and internal layer shield (2), 1 ~ 9 the first power source surge protector (SPD) (7) is installed, the each interface of three-phase electricity connects 1, with the cable series connection or in parallel entering outer shield (1) and internal layer shield (2), 1 ~ 9 holding wire, control circuit protector (SPD) (8) are installed between outer shield (1) and internal layer shield (2) connect with the signal wires entering outer shield (1) and internal layer shield (2), first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) (8) are arranged on distance doorway place 50 ~ 200mm so that maintenance and replacing, with the 3rd screw (19) the first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) (8) are fixed on internal layer shield (2), 3rd screw (19) is welded on the outer surface of internal layer shield (2), also can the first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) 8 are arranged in the second hole (5) outward, distance the second hole (5) 50mm ~ 300mm is fixed on the outer surface of internal layer shield (2) with the 3rd screw (19), or the first power source surge protector (SPD) (7), holding wire, control circuit protector (SPD) (8) are arranged in second hole (5) of internal layer shield (2), the inner surface of internal layer shield (2) is fixed on the 3rd screw (19), 1 second source Surge Protector (SPD) (9) is connected with outer shield (1), and be connected with 1 the second earth lead (18), 1 the 3rd power source surge protector (SPD) (10) are connected with internal layer shield (2) and are connected with 1 the first earth lead (17), first earth lead (17) and the second earth lead (18) are cannot can do equipotential link during ground connection, second source Surge Protector (SPD) (9), 3rd power source surge protector (SPD) (10) and the first earth lead (17), the connected mode of the second earth lead (18) is serial or parallel connection.
2. the electromagnetic screen of charged Surge Protector holding wire control circuit protector according to claim 1; it is characterized in that: one or more the first power source surge protector (SPD) (7); be arranged in the inside of outer shield (1), in parallel with the cable entered or be connected in series.
3. the electromagnetic screen of charged Surge Protector holding wire control circuit protector according to claim 1; it is characterized in that: one or more holding wires, control circuit protector (SPD) (8); be arranged in the inside of outer shield (1), be connected in series with the signal line cable entered.
4. the electromagnetic screen of charged Surge Protector holding wire control circuit protector according to claim 1 and 2, it is characterized in that: one or more the first power source surge protector (SPD) (7), be arranged in the inside of outer shield (1), the outside of internal layer shield (2), in parallel with the cable entered or be connected in series, with the 3rd fixed screw (19), the first power source surge protector (SPD) (7) are fixed on the outer surface of internal layer shield (2), 3rd fixed screw (19) welds or is screwed on internal layer shield (2) with thread.
5. the electromagnetic screen of the charged Surge Protector holding wire control circuit protector according to claim 1 or 3, it is characterized in that: one or more holding wires, control circuit protector (SPD) (8), be arranged in the inside of outer shield (1), the outside of internal layer shield (2), connect with the signal line cable entered, with the 3rd screw (19) holding wire, control circuit protector (SPD) (8) are fixed on the outer surface of internal layer shield (2), 3rd screw (19) welds or is screwed on internal layer shield (2) with thread.
6. the electromagnetic screen of charged Surge Protector holding wire control circuit protector according to claim 1; it is characterized in that: in parallel with the second earth lead (18) to one or more second source Surge Protector (SPD) (9) or be connected in series, be arranged in the outer surface of outer shield (1).
7. the electromagnetic screen of charged Surge Protector holding wire control circuit protector according to claim 1, it is characterized in that: in parallel with the first earth lead (17) to one or more the 3rd power source surge protector (SPD) (10) or be connected in series, be arranged in the inside of outer shield (1), the outside of internal layer shield (2): with the 3rd screw (19) the first power source surge protector (SPD) (7), be fixed on the outer surface of internal layer shield (2), 3rd screw (19) welds or is screwed on internal layer shield (2) with thread.
8. the electromagnetic screen of charged Surge Protector holding wire control circuit protector according to claim 1; it is characterized in that: between outer shield (1), internal layer shield (2), have multiple skeleton (3) to be made by non-conductive and non-magnetic nonmetallic materials; length is equal with shield, installation parallel with shield base.
9. the electromagnetic screen of charged Surge Protector holding wire control circuit protector according to claim 1; it is characterized in that: outer shield (1) has multiple the first hole (4) being installed into outlet; internal layer shield (2) there is multiple the second hole (5) being installed into outlet; first hole (4) and the second hole (5) are not point-blank; not in one plane, and become corresponding relation.
10. the electromagnetic screen of charged Surge Protector holding wire control circuit protector according to claim 1, is characterized in that: the first power source surge protector (SPD) (7); Holding wire, control circuit protector (SPD) (8) are arranged in the second hole (5) outer distance hole (5) 50mm ~ 300mm, the outer surface of internal layer shield (2) is fixed on the 3rd screw (19), or the first power source surge protector (SPD) (7); Holding wire, control circuit protector (SPD) (8) are arranged in the interior inner surface being fixed on internal layer shield (2) with the 3rd screw (19) in the second hole (5) of internal layer shield (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010109879.5A CN102647894B (en) | 2010-01-27 | 2010-01-27 | Electromagnetic shielding device for signal line control circuit protector with power surge protector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010109879.5A CN102647894B (en) | 2010-01-27 | 2010-01-27 | Electromagnetic shielding device for signal line control circuit protector with power surge protector |
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| CN102647894A CN102647894A (en) | 2012-08-22 |
| CN102647894B true CN102647894B (en) | 2015-04-01 |
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| CN201010109879.5A Expired - Fee Related CN102647894B (en) | 2010-01-27 | 2010-01-27 | Electromagnetic shielding device for signal line control circuit protector with power surge protector |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659974A (en) * | 2013-11-17 | 2015-05-27 | 韩磊 | Electromagnetic field shielding system for driving motor of electric vehicle |
| CN105099085B (en) * | 2014-05-23 | 2018-12-04 | 韩磊 | The electromagnetic-field-shielded system of electric vehicle motor controller |
| CN106208529B (en) * | 2015-04-30 | 2018-11-06 | 韩磊 | The electromagnetic-field-shielded system of electric vehicle motor controller |
| CN105811667B (en) * | 2015-06-12 | 2018-05-22 | 韩磊 | The electromagnetic-field-shielded system of electric vehicle drive motor |
| CN107205334A (en) * | 2016-03-17 | 2017-09-26 | 韩磊 | Electromagnetic pulse attack defense system of container type data center |
| CN107346926A (en) * | 2016-05-04 | 2017-11-14 | 韩磊 | The shielding external electromagnetic pulse attack system of electric vehicle motor controller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63234569A (en) * | 1987-03-24 | 1988-09-29 | Asahi Chem Ind Co Ltd | Magnetic shielding material |
| JP2003188610A (en) * | 2001-12-18 | 2003-07-04 | Mitsubishi Electric Corp | High frequency circuit |
| CN2932933Y (en) * | 2006-07-03 | 2007-08-08 | 四川协合科技有限公司 | Surge prevention device |
| CN201113423Y (en) * | 2007-10-22 | 2008-09-10 | 曾子成 | Three phase energy supply protector for surge |
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2010
- 2010-01-27 CN CN201010109879.5A patent/CN102647894B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63234569A (en) * | 1987-03-24 | 1988-09-29 | Asahi Chem Ind Co Ltd | Magnetic shielding material |
| JP2003188610A (en) * | 2001-12-18 | 2003-07-04 | Mitsubishi Electric Corp | High frequency circuit |
| CN2932933Y (en) * | 2006-07-03 | 2007-08-08 | 四川协合科技有限公司 | Surge prevention device |
| CN201113423Y (en) * | 2007-10-22 | 2008-09-10 | 曾子成 | Three phase energy supply protector for surge |
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| CN102647894A (en) | 2012-08-22 |
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