CN211405010U - Active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device - Google Patents
Active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device Download PDFInfo
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- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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Abstract
The utility model provides an initiative connects flashing formula active pre-discharge limit thunder type direct attack thunder protector. The method comprises the following steps: the lightning receiving unit comprises a lightning receiving metal device body, a moving electric field collecting plate, an insulating sleeve, a main structure body and a bottom support, and the lightning receiving unit comprises a lightning current limiting system; the lightning-receiving metal device body is a through body rod with a through hole in the center, and the protruding tip of the lightning-receiving metal device body is used for receiving a lightning electric field; the upper groove of the moving electric field collecting plate is contacted with the upper part of the lightning-receiving metal device body through an insulating sleeve, and the lower groove is connected with the main structure shell; the lower part of the lightning receiving metal device body is provided with a bottom support, an upper bolt of the lightning current limiter is rotatably connected with an inner screw thread at the bottom of the lightning receiving metal device body, and a lower bolt of the lightning current limiter is rotatably connected with a down lead of the ground net. The utility model discloses a device has designed photovoltaic system and inside solar energy special battery electrical power generating system, realizes the continuous lightning receptor nature of direct attack thunder protector, has realized that the lightning receptor probability is 100%.
Description
Technical Field
The utility model relates to a lightning protection technical field especially relates to an initiative lightning-arrest formula active pre-discharge limit for thunder type direct attack thunder protector.
Background
In modern war, fixed command system, communication system, weaponry and medical logistics supply system, fixed survivability of geographical position is extremely poor, is difficult to adapt to the war survival demand under high technical condition. The method comprises the following steps: integrated comprehensive information systems such as a motorized small-area field operation array, a motorized field operation command post, a motorized field operation hospital, a motorized field operation logistics support warehouse, a motorized field operation communication vehicle (a field operation radar vehicle, a field operation monitoring vehicle and a communication command vehicle) and a motorized small-area operation array (a radar station, a navigation station and a command center machine room) must have functions of transfer and motorized deployment at any time. The combat demands set temporarily under different environmental conditions are different, and the system also needs to cope with the examination of the severe environment and climate in the nature under the attack of 'soft killing' and 'hard destruction' of defending enemies. Especially lightning destruction is important. A lightning stroke means a single or multiple lightning current impact, which can cause serious damage to electronic system lines and equipment. This is a devastating damage to the information-based device. As thunder has the tendency and characteristics of finding the rapid neutralization of the minimum path leakage thundercloud charges and the earth anisotropic charges, the mobile field operation system works in the field, and when the lightning phenomenon occurs nearby, equipment damage and personal safety accidents are caused.
Therefore, the system meets the use requirements of all regions and all weather, fully ensures the personal safety and the equipment safety and is complete, and the lightning protection becomes an essential key link in the safety design of the mobile field operation system. Therefore, the army also issues correspondingly: GJB7581-2012 'requirements for lightning protection of mobile communication systems', GJB5080-2004 'requirements for lightning protection design and use of military communication facilities', GJB6784-2009 'general requirements for lightning protection of military ground electronic facilities', GJB6071-2007 'requirements for lightning protection technology of military meteorological stations', GJB1389A-2005 'requirements for system electromagnetic compatibility', GJB8848-2016 'test methods for system electromagnetic environmental effects', and GB18802.12-2014 'Surge protector for low-voltage distribution systems': the standards of selection and use of the guide rules and the like aim to thoroughly reduce and solve the problems of lightning hazard and lightning protection,
the prior art pre-discharge direct lightning protection device for motor vehicle has the following disadvantages:
A. the existing pre-discharge direct lightning protection device is a passive device generally, and a plurality of metal induction electrode plates are arranged outside the passive device and supply power to the whole device system by virtue of induction voltage formed by electric field change. Usually by absorbing induced voltage conditions in the laboratory: 10-25 KV/m, energy storage is completed for a long time or after several times of ineffective (voltage wave) high-voltage impacts, namely: the parameters with pre-discharge effect are completed for 1 time, and the induction efficiency is less than 0.1 joule. After the device is installed, the device has no continuous pre-discharge protection effect at all, but the mechanical field battle protection system is filled with the Chinese yam and only can provide continuous discharge. The active and passive problems of the mechanical pre-discharge direct lightning protection device are core and key problems.
B. The conventional pre-discharge direct lightning protection device is a passive device generally, and the continuous lightning connection of the direct lightning protection device cannot be realized. Particularly, in mountainous areas, watersheds, gobi, grasslands and other places with poor geological conditions and high lightning occurrence areas, because the work cannot be carried out without the support of active energy, a plurality of accident phenomena and accident hidden dangers exist.
C. Although the prior pre-discharge direct lightning protection device can complete lightning receiving behaviors with pre-discharge effects for a plurality of times in a laboratory, blind areas and blind spots (namely, non-operation: areas and points) of lightning receiving often occur. The serious consequence causes the failure of the whole mobile field operation protection system, and the actual operation requirement of all weather, all regions and no blind spot can not be met.
D. Although the existing pre-discharge direct lightning protection device for the motor vehicle can complete the lightning receiving behavior with the pre-discharge effect for a plurality of times in a laboratory, (the pre-discharge direct lightning protection device and a common metal lightning receptor are tested at a distance of 1 meter under the same height), the lightning receiving probability of the existing pre-discharge direct lightning protection device for the motor vehicle is only 50 percent at most, and in addition, the probability of 50 percent is not connected with lightning and is not alive. The method causes great harm and danger to military facilities, and has the possibility of causing ammunition explosion, equipment damage, casualties and even battle failure.
E. The existing pre-discharge direct lightning protection device for the organic power has advanced lightning receiving discharge time between the pre-discharge direct lightning protection device and a common metal lightning receiving needle, and is a marking parameter of a pre-discharge technology. The prior pre-discharge direct lightning protection device for use only can meet 60 mu S, but the field system usually requires: 75-100 muS.
F. The existing pre-discharge direct lightning protection device for organic use is the same as a common metal lightning receiving needle, cannot limit the energy of lightning current (namely, the amplitude of the lightning current after lightning receiving does not change at all), and even if the pre-discharge lightning receiving effect with certain probability is realized, the peak value of the lightning current discharged into the ground is the same as that of the common metal lightning receiving device, and no attenuation effect exists.
G. The existing pre-discharge direct lightning protection device for organic power is the same as a common metal lightning receiving needle, and after lightning is received, the lightning electromagnetic pulse induced overvoltage caused by lightning discharged by a lightning receptor and flowing into the ground still can endanger ground personnel and military electronic equipment. Once taken care of directly by lightning, it has substantially failed or is totally damaged.
H. The existing pre-discharge direct lightning protection device for use is the same as a common metal lightning receiving needle, after lightning receiving, ground potential high-voltage counterattack and high-voltage counterattack on a ground screen caused by lightning current discharged by a lightning receiver directly damage equipment, and meanwhile, casualty phenomena and hidden dangers can be caused.
I. The existing pre-discharge direct lightning protection device for organic use (because large lightning current needs to be discharged to the ground) requires that a grounding network used is less than 30 omega, and in the practical application process, particularly in the geological severe land conditions, the grounding network of the mobile field operation system is difficult to meet, and is difficult to realize.
J. Compared with the lightning receiving voltage of a common metal lightning receiving needle, the lightning receiving voltage of the conventional pre-discharge direct lightning protection device for organic use is usually reduced by 5KV, and the lightning receiving voltage parameters are as follows: which means that the pre-discharge lightning effect is very limited.
K. The existing pre-discharge direct lightning protection device for eliminating corona current is only microampere level generally, and the direct lightning protection effect of the mobile field operation system is examined, and the actual standard is at least 10 milliamperes.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides an initiative connects active limit thunder type direct attack thunder protector that discharges in advance of flashing formula to overcome prior art's problem.
An active lightning receiving type active pre-discharging lightning limiting type direct lightning protection device comprises: the lightning receiving unit comprises a lightning receiving metal device body, a moving electric field collecting plate, an insulating sleeve, a main structure body and a bottom support, and the lightning receiving unit comprises a lightning current limiting system;
the lightning-receiving metal device body is a through body rod with a through hole in the center, and the protruding tip part of the lightning-receiving metal device body is used for receiving a lightning electric field and lightning current;
the center of the moving electric field collecting plate is provided with a through hole, the upper part and the lower part of the moving electric field collecting plate are provided with mounting grooves, the upper groove of the moving electric field collecting plate is contacted with the upper part of the lightning receiving metal device body through an insulating sleeve, and the lower groove of the moving electric field collecting plate is connected with the main structure shell;
the lower part of the lightning receiving metal device body is provided with a bottom support, the bottom support is a bowl with a through hole in the center, the lightning receiving metal device body is connected with the through hole in the bottom support, the lower part of the bottom support is connected with the lower part of the lightning receiving metal device body, and an installation groove in the upper part of the bottom support is connected with a lower shell of the main body structure;
the upper bolt of the lightning current limiter is rotatably connected with the inner screw thread at the bottom of the lightning receiving metal device body, and the lower bolt of the lightning current limiter is rotatably connected with the down lead of the ground net.
Preferably, the main structure is a tubular structure, and is made of a non-metal transparent high-voltage insulating material, and the wall thickness is as follows: 3-8 mm.
Preferably, the insulating sleeve is a polytetrafluoroethylene insulating sleeve or other high-voltage insulating sleeves, and the lightning receiving metal device body and the bottom support are made of stainless steel.
Preferably, the main structure includes: the system comprises a source working system, a moving electric field acquisition system, an active lightning receiving system, a gain amplification system, a photoelectric isolation system and a corona generator system which are sequentially connected in series; the source working system comprises a solar cell collecting plate and an internal battery, the solar cell collecting plate is arranged on the inner wall of the shell of the main structure, the solar cell collecting plate transmits collected solar energy to the internal battery, the internal battery is a-40 ℃ low-temperature lithium battery, and energy is provided for all levels of power utilization devices through an inverter output device.
Preferably, the active lightning receptor system comprises: the device comprises a field effect transistor, a first-stage field triode and a second-stage simulation triode which are connected in series, wherein the motion electric field acquisition system comprises a motion charge field high-impedance circuit;
the lightning electric field signal collected by the lightning receiving metal device body is input to the input end of the motion charge field high-impedance circuit, and the field effect tube, the first-level field triode and the second-level simulation triode complete the three-level power amplification function of the lightning electric field signal.
Preferably, the gain amplification system comprises a full-field effect transistor gain amplifier, and the gain amplification system performs multi-stage full-field effect amplification processing on the lightning electric field signal to obtain a low-level control signal, and transmits the low-level control signal to the photoelectric isolation circuit.
Preferably, the photoelectric isolation circuit adopts a TLP521 gallium arsenide optical coupling circuit, the corona elimination system comprises a G1 and E1 two-stage high-voltage step-up transformer and a peripheral circuit, an N1 coil of the G1 high-voltage step-up transformer is less than 5 turns, an N2 coil is less than 40 turns, an N4 coil of the E1 high-voltage step-up transformer is less than 15 turns, an N5 coil is less than 800 turns, and the peripheral circuit comprises a triode, a DC power supply, a capacitor and a coil;
under a preset electric field, the photoelectric isolation circuit isolates a high-voltage system from a low-level control signal, a power supply control switch K of a corona elimination system is closed, a triode in a peripheral circuit starts self-oscillation, 10-25KV pulse voltage wave signals are output after a G1 and E1 two-stage high-voltage step-up transformer is used, current is output through a current-limiting resistor, and discharge offset of corona current is achieved.
Preferably, the lightning current limiter system comprises a plurality of serially connected archimedean attenuators, and an insulating silica gel sleeve is sleeved outside each archimedean attenuator.
Preferably, the archimedes attenuator comprises an annealed copper strip wrapped by insulating varnish, 1 RVV cable is welded at each of two ends of the copper strip after the varnish is removed, the direction of 2 RVV cables is 180 degrees, the archimedes is rolled into a cylinder from the center of the copper strip, and the cylinder is tightly wound by glue to obtain the archimedes attenuator.
Preferably, the thickness of the usual copper strip is: 0.2-0.5mm, width: 40-120 mm.
By the foregoing the technical scheme of the utility model the embodiment provides can see out, the utility model discloses the initiative connects the active limit thunder type direct attack thunder protector that discharges in advance of flashing formula has designed photovoltaic system and inside solar energy special battery electrical power generating system, has realized that the probability of receiving the sudden strain of a muscle is 100%, and thorough solution the blind area of receiving the sudden strain of a muscle device, this core of blind spot, key problem satisfy the actual combat requirement of "all-weather, all-terrain, no blind spot". The continuous lightning receiving performance of the direct lightning protection device is realized. Especially in the mountainous area, the water side, the gobi, the grassland and other places with bad geological conditions and areas with high lightning, a plurality of accident potential can be avoided. Compared with the prior lightning receiving discharge time between the active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device and a common metal lightning receiving needle, the prior lightning receiving discharge time is more than or equal to 80 mu S, and the technical requirement of motor-driven field operation lightning protection is met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a structural diagram of an active lightning receiving active pre-discharge lightning limiting direct lightning protection device according to an embodiment of the present invention;
fig. 2 is a schematic view of the working principle of an active lightning receiving active pre-discharge lightning limiting direct lightning protection device according to an embodiment of the present invention;
fig. 3 is a structural diagram of an active lightning receptor system according to an embodiment of the present invention;
fig. 4 is a structural diagram of a gain amplifying system according to an embodiment of the present invention;
fig. 5 is a structural diagram of a photoelectric isolation circuit according to an embodiment of the present invention;
fig. 6 is a structural diagram of a corona elimination system according to an embodiment of the present invention;
fig. 7 is a structural diagram of a lightning current limiting system according to an embodiment of the present invention, 71, a cable 72, an enameled copper strip;
fig. 8 is a structural diagram of an archimedes attenuator of the archimedes attenuator according to an embodiment of the present invention, 81, bolts M16 × 30,82, and an insulating silica gel cover; 83 and an end cover.
Detailed Description
For the convenience of understanding the embodiments of the present invention, the following description will be given by way of example only with reference to the accompanying drawings, and the embodiments are not limited thereto.
The embodiment of the utility model provides a pair of initiatively connect active limit thunder type direct attack thunder protector that discharges in advance of flash formula's structure chart is shown in figure 1, and the theory of operation schematic diagram is shown in figure 2. The above-mentioned device includes: the lightning receiving unit comprises a lightning receiving metal device body, a collecting plate, an insulating sleeve, a main structure body and a bottom support, and is used for limiting a lightning current system which is used for receiving the ground after lightning. The main structure includes: the system comprises a source working system, a solar cell collecting plate, an active lightning receiving system, a gain amplifying system, a photoelectric isolation system, a corona generator system and the like.
Referring to fig. 1, the lightning receiving metal device body is a whole body rod with a through hole arranged at the center, and is a 316 stainless steel body, and the upper part of the lightning receiving metal device body is a protruding tip part used for receiving a lightning electric field. The motion electric field collection plate is a 316 stainless steel collection plate with a through hole arranged at the center, the upper part and the lower part of the motion electric field collection plate are both provided with installation grooves, and the upper grooves are in close contact with the upper part of the lightning receiving metal device body through polytetrafluoroethylene insulation sleeves. The lower groove is connected with the tubular main structure shell in a tight (watertight) manner, and the main structure shell is made of a high-strength nonmetal transparent high-voltage insulating material and can be: transparent polytetrafluoroethylene, organic glass, etc., wall thickness: 3-8mm, and the solar cell collecting plate is arranged on the inner wall of the shell of the main structure.
The lower part of the whole body rod of the lightning receiving metal device body is provided with a bottom support, the bottom support is a bowl with a through hole in the center, and the bottom support is a 316 stainless steel body. The collecting plate, the lightning-receiving metal device body and the through hole in the bottom support are connected.
The lower part of the bottom support is connected with the lower part of the lightning receiving metal device body, and the upper part of the bottom support is provided with a mounting groove which is tightly (watertight) connected with the shell of the tubular main body structure (lower part). The bottom of the whole body rod is provided with an internal screw device which is rotatably connected with an upper bolt of the lightning current limiter (needs to be screwed when being installed). The lower bolt of the lightning current limiter is rotatably connected with a down lead (a wire copper nose) of a ground net (needs to be screwed when being installed).
A flexible solar cell collecting plate is closely mounted on the inner wall of a shell of the tubular main body structure and used for collecting light-transmitting solar energy to supply power (charge) for an internal battery, and the internal battery outputs a direct-current power supply through an inverter system to supply uninterrupted energy to electric devices such as a moving electric field collecting plate, a gain amplification system, a photoelectric isolation system, a corona generator and the like (the supply method is a direct connection type). The moving electric field collecting board is directly connected to the input end Vi of the collecting circuit (figure 3), the amplified signal is read from the RL and is directly connected to the input end Vc of the gain amplifying system (figure 3) for further amplification through the amplifying operation (Vcc is the amplifier operating voltage) of the field mode amplifier (namely, the moving electric field collecting system), and the signal Vc1 or Vc2 (namely, a control signal) is taken out from R1 or R2. The back directly links to the electrical isolation system, realizes the special photoelectric isolation (fig. 4) of high-voltage terminal and low-voltage terminal, and among this isolated circuit, RV is the voltage value direct current for the regulation (undetermined) work: 5-6V. The isolating circuit output direct control switch (K) is a work instruction device switch of the corona generator. Namely: (see circuit of fig. 5) K is closed, the corona generator starts to operate to output an ignition corona voltage and current at the (secondary) N5 terminal of the booster of the second stage E1. One end of N5 output connects the metal arrester, and the other end output corona and the metal arrester generate the discharge phenomenon, offsets the corona of the metal arrester caused by the induction of the atmospheric electric field, thereby achieving the purpose and the phenomenon of the earlier (in the common lightning rod) lightning arrester compared with the common lightning rod.
The insulating sleeve can be a polytetrafluoroethylene insulating sleeve, the lightning-receiving metal device body and the bottom support can be stainless steel, and the main structure body is insulating and light-transmitting. The lightning current limiter system comprises a plurality of Archimedes attenuators, and an insulating silica gel sleeve is sleeved outside each Archimedes attenuator.
The basic working principle of the source working system is as follows:
the source working system adopts a polycrystalline silicon solar cell collecting plate which is a photoelectric semiconductor slice for directly generating electricity by utilizing sunlight. It can output voltage and generate current under the condition of loop as long as it is illuminated by light meeting a certain illumination condition. And after electric energy is collected, energy is compensated for the internal battery and the whole device. The internal battery of the source working system adopts a low-temperature lithium battery with the temperature of minus 40 ℃, the solar battery is a supplementary power supply of the low-temperature lithium battery, the output of the solar battery is not less than 80mA usually, and the power supply voltage range is as follows: 12-24 Vac. Considering the natural rain flash and the snow flash, the low-temperature lithium battery used is required to endure the ambient temperature of-40 ℃ in consideration of the snow flash. The internal low-temperature lithium battery provides energy for all levels of power utilization devices through the inverter output device.
The embodiment of the present invention provides an active lightning receiving system having a structure as shown in fig. 3, wherein lightning is generated according to the intensity of an electric field of atmospheric charge motion, and the occurrence of lightning is an approximate probability event when the intensity of the electric field generally satisfies a certain value (e.g., 5-10 KV/m) or more in a thunderstorm weather. The lightning electric field signal level collected by the lightning metal device body is input to an input end Vi of the moving charge field high impedance circuit. The lightning electric field level that input Vi received is transmitted to one-level field triode, second grade simulation triode, and above-mentioned one-level field triode, second grade simulation triode amplify the lightning electric field level, and with little ford lightning electric field level amplification for millivolt lightning electric field level, the lightning collection signal Vc after the output amplification in the Q3 triode accomplishes the power amplification function of the lightning electric field level that the tertiary can set for.
The motion electric field collecting plate is a 316 stainless steel motion electric field collecting plate of a special semiconductor, and the 316 stainless steel motion electric field collecting plate is a high-impedance collecting system under a motion charge field. The 316 stainless steel moving electric field collecting plate is used for collecting a moving charge electric field signal Vi of lightning, and the moving charge electric field signal Vi passes through a signal potential collecting loop formed by a capacitor (0.01-5.1) mu F and an Rg resistor, and is generally in a (mu V) level. The rear connection uses the triode Q1 of the field effect to realize the function of the first-order discharge, the characteristic Q1 input impedance is larger, Rg takes (1-50) M omega at this moment, Rd takes (1-30) K omega, Rso takes (20-800) omega, Q2 and Q3 are general analog triodes, this circuit is a typical triode discharge circuit of field effect + simulation, the characteristic: the weak signal collection of the electric field is realized by utilizing the high-impedance input of the field effect transistor (the amplification factor of the field effect transistor is very limited), the subsequent simulation is a triode amplification circuit, and the amplification effect is obvious and is usually the product relation of the amplification factors. Vcc is typically 6-9 Vdc. Rc2 is (1-30) K omega, Re is (10-800) omega, Re2 is (1-60) K omega, Re3 is (1-60) K omega, RL is (1-20) K omega, C1 and C2 are debugging capacitors which are (5.1-200) mu F, and the amplified signal level (defined as Vc) is collected at Vcc and grounding point in parallel. The method is characterized in that: the high-impedance (several mu V) level motion charge electric field signal input function and the output realize the acquisition function of (more than mV) level output by simulating the multiplication factor product relation of a triode.
The embodiment of the utility model provides a structure of gain amplification system is shown in fig. 4, and lightning collection signal Vc gets into the gain amplification system, and the gain amplification system can be for full field effect transistor gain amplifier, and the gain amplification system carries out multistage full field effect amplification to Vc and handles, under Vcc (DC power supply for work) (generally take value 6-12Vdc), accomplishes the gain and enlargies to Vc1 or Vc2, obtains low level control signal.
The embodiment of the utility model provides a photoelectric isolation circuit's structure is shown in fig. 5, and low level control signal inputs photoelectric isolation circuit, and photoelectric isolation circuit adopts TLP521 gallium arsenide opto-coupler circuit, and R1 gets (100) and supplyes 800) omega, and drive voltage 5Vdc, Q1 triode select for use the 8050 triode, can replace with 2SC2060, 2SC 1846. The NPN transistors 9014, 9013 and 2N5551 were used instead of the NPN transistors, and their pins were arranged in the same manner, except that the power of the transistors was not as high as 8050. D1 is usually 1N4001, R2 is (100-.
The embodiment of the utility model provides a structure of corona eliminating system is shown in figure 6, and the theory of operation of corona eliminating system is: the high-voltage boosting transformer comprises a G1 and E1 two-stage high-voltage boosting transformer and a peripheral circuit, wherein an N1 coil of G1 is less than 5 turns, an N2 coil is less than 40 turns, and an N3 coil is less than 400 turns. Selecting a circuit: the Q1 selects the 8550 transistor (8550 is a low voltage, high current, small signal PNP type silicon transistor-maximum collector current is 1.5A). DC1 power supply is selected to be 1.5-3V, C1 is selected to be 50-200 muF, C2 is selected to be 2.7 muF, R1 is selected to be 0.2-2K omega, and G1 is selected to be MX-2000 ferrite core (initial magnetic permeability is more than 2000). E1N 4 coil < 15 turns, N5 coil < 800 turns, C3/C4/C5 selected 0.1 muF, D1\ D2 selected RF407, R2 selected 51-820K Ω, R3 selected 0.2-2K Ω, adjustable W1 selected 150K Ω, RS1 selected MCR100, E1 selected MX-2000 ferrite core (initial permeability > 2500). The output end of N5 is connected with a metal lightning arrester, and a gap discharge point which can be adjusted is suspended between the metal lightning arrester and the N5 lightning arrester. After the system is adjusted, the discharge voltage is 10-25KV, and the discharge current interval is as follows: 10-50 mA. The discharge polarity is a positive and negative exchange output mode, the output frequency is the same as the self-excitation frequency of the triode and ranges from 1 KHz to 50 KHz.
When the atmospheric electric field reaches set parameters, a power supply control switch K of the corona eliminating system is closed, the corona eliminating system starts to work, a Q1 tube starts to perform self-oscillation, 10-25KV pulse voltage wave signals are output after a G1 and E1 two-stage high-voltage step-up transformer is used, and current is output through a current-limiting resistor, so that the discharge offset of corona current is realized. I.e. to counteract the corona current induced by a lightning-receiving metallic body arrangement that has been grounded due to an atmospheric electric field, typically in the range of 10-50mA (which can be preset).
The embodiment of the utility model provides a limit lightning current system's block diagram is shown in FIG. 7: the lightning current limiting system adopts the manufacturing technology of an Archimedes attenuator. The copper strip which is wrapped by high-insulation (more than 1000V) enamel and is subjected to high-temperature annealing treatment is adopted, after two ends of the copper strip are subjected to paint removal treatment, 2 insulating RVV cables (the direction is 180 degrees) are discarded by welding, after welding, Archimedes is rolled into a cylinder from the circle center, and after being wound tightly, the copper strip is adhered tightly by special adhesive, and the thickness of the copper strip is generally as follows: 0.2-0.5mm, width: 40-120mm, obtaining the Archimedes attenuator which is used as a lightning current limiting system. The inductance of the Archimedes attenuator tested by the bridge is as follows: 200-400 muH, Archimedes attenuators can be used in series.
The embodiment of the utility model provides a structure diagram of Archimedes attenuator is shown in FIG. 8, customizes standard high-voltage insulating silicon rubber cover according to Archimedes attenuator's appearance, and Archimedes attenuator's both ends welding M16 metal bolt puts into standard high-voltage insulating silicon rubber cover back with Archimedes attenuator, pours into high-pressure silicon rubber and installs the metal end cover and solidify together.
Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice the present invention.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
To sum up, the utility model discloses initiative connects the active limit thunder type of discharging in advance of flashing formula directly to strike thunder protector has designed photovoltaic system and inside solar energy special battery electrical power generating system, has realized that the probability of meeting the sudden strain of a muscle is 100%, and thorough solution meets the blind area of sudden strain of a muscle device, this core of blind spot, key problem, satisfies the actual combat requirement of "all-weather, all-terrain, no blind spot".
The active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device realizes the continuous lightning receiving performance of the direct lightning protection device. Especially in the mountainous area, the water side, the gobi, the grassland and other places with bad geological conditions and areas with high lightning, a plurality of accident potential can be avoided.
Compared with the prior lightning receiving discharge time between the active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device and a common metal lightning receiving needle, the prior lightning receiving discharge time is more than or equal to 80 mu S, and the technical requirement of motor-driven field operation lightning protection is met.
The active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device limits 80% of lightning receiving ground current due to the fact that the lightning current limiter is installed in series behind the active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device, so that the ground resistance of a grounding network is smaller than 50O omega, and redundancy is provided for a lightning protection site.
Compared with the lightning receiving voltage of a common metal lightning receiving needle, the active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device reduces 15KV, and is seen from lightning receiving voltage parameters: this means that the pre-discharge lightning effect is very desirable.
The active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device limits 80% of lightning receiving ground current due to the fact that the lightning current limiter is installed in series behind the active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device, and therefore the high voltage induced by lightning electromagnetic pulses generated in the process that lightning flows into the ground after lightning receiving is reduced by 80%, and guarantees are provided for electronic micro-electronic equipment of a motorized field operation system.
The active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device limits 80% of lightning receiving ground current due to the fact that the lightning current limiter is installed in series behind the active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device, and therefore ground potential counterattack high voltage in the process that lightning flows into the ground after lightning receiving is reduced by 80% and guarantee is provided for electronic and microelectronic equipment of a motorized field operation system.
The active lightning-receiving active pre-discharge lightning-limiting direct-strike protection device has the advantages that the lightning current limiter is installed in series behind the active lightning-receiving active pre-discharge lightning-limiting direct-strike protection device, so that the gradient of the current entering the ground is 30 times wider, and the damage phenomenon of information equipment (such as a CPU chip or an integrated circuit) is basically resisted.
Through the simulation test of a national third-party laboratory: the active lightning receiving type active pre-discharge lightning limiting direct-attack lightning protection device has the advantages that 20KA lightning current is input to the ground at 3.75KA (attenuation lightning current: 16.25 KA); the lightning current of 40KA is grounded at 7.7KA (the attenuation lightning current is 32.3 KA); the 60KA lightning current is set to be 11.4KA (attenuation lightning current: 48.6KA) in the ground; the 100KA lightning current is driven to the ground by 19.9KA (attenuation lightning current: 80.1 KA).
In the active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device, the corona current is eliminated and reaches 10-20mA, and the technical requirement of maneuvering field operation lightning protection is met.
The active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device passes through a national third-party laboratory: and (4) carrying out all testing work of the Beijing lightning protection testing center.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an initiative connects active limit thunder type direct attack thunder protector that discharges in advance of flashing formula which characterized in that includes: the lightning receiving unit comprises a lightning receiving metal device body, a moving electric field collecting plate, an insulating sleeve, a main structure body and a bottom support, and the lightning receiving unit comprises a lightning current limiting system;
the lightning-receiving metal device body is a through body rod with a through hole in the center, and the protruding tip part of the lightning-receiving metal device body is used for receiving a lightning electric field and lightning current;
the center of the moving electric field collecting plate is provided with a through hole, the upper part and the lower part of the moving electric field collecting plate are provided with mounting grooves, the upper groove of the moving electric field collecting plate is contacted with the upper part of the lightning receiving metal device body through an insulating sleeve, and the lower groove of the moving electric field collecting plate is connected with the main structure shell;
the lower part of the lightning receiving metal device body is provided with a bottom support, the bottom support is a bowl with a through hole in the center, the lightning receiving metal device body is connected with the through hole in the bottom support, the lower part of the bottom support is connected with the lower part of the lightning receiving metal device body, and an installation groove in the upper part of the bottom support is connected with a lower shell of the main body structure;
the upper bolt of the lightning current limiter is rotatably connected with the inner screw thread at the bottom of the lightning receiving metal device body, and the lower bolt of the lightning current limiter is rotatably connected with the down lead of the ground net.
2. The device of claim 1, wherein the main structure is a tubular structure, is a non-metal transparent high voltage insulating material, and has a wall thickness of: 3-8 mm.
3. The device of claim 1, wherein the insulating sleeve is a teflon insulating sleeve, and the lightning conductor body and the mounting are stainless steel.
4. The apparatus of claim 1, wherein the main structure comprises: the system comprises a source working system, a moving electric field acquisition system, an active lightning receiving system, a gain amplification system, a photoelectric isolation system and a corona generator system which are sequentially connected in series; the source working system comprises a solar cell collecting plate and an internal battery, the solar cell collecting plate is arranged on the inner wall of the shell of the main structure, the solar cell collecting plate transmits collected solar energy to the internal battery, the internal battery is a-40 ℃ low-temperature lithium battery, and energy is provided for all levels of power utilization devices through an inverter output device.
5. The apparatus of claim 4, wherein the active lightning receptor system comprises: the device comprises a field effect transistor, a first-stage field triode and a second-stage simulation triode which are connected in series, wherein the motion electric field acquisition system comprises a motion charge field high-impedance circuit;
the lightning electric field signal that the lightning metal installation body will gather is input to the input of motion charge field high impedance circuit, tertiary power amplification function of lightning electric field signal is accomplished to field effect transistor, first order field triode, second grade simulation triode.
6. The apparatus of claim 5, wherein the gain amplification system comprises a full-FET gain amplifier.
7. The device of claim 6, wherein the optoelectronic isolation circuit is a TLP521 GaAs optical coupling circuit, the corona elimination system comprises a G1 and E1 two-stage high voltage step-up transformer and peripheral circuits, the G1 high voltage step-up transformer has N1 turns < 5 turns, the N2 turns < 40 turns, the E1 high voltage step-up transformer has N4 turns < 15 turns, and the N5 turns < 800 turns, and the peripheral circuits comprise a triode, a DC power supply, a capacitor and a coil.
8. The apparatus of claim 7, wherein the lightning current limiter system comprises a plurality of serially connected Archimedes attenuators, each of which is externally sleeved with an insulating silicone jacket.
9. The apparatus of claim 8, wherein the archimedes attenuator comprises an annealed copper ribbon using an insulating enamel.
10. The apparatus of claim 9, wherein the copper ribbon has a thickness of: 0.2-0.5mm, width: 40-120 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170838.0A CN111193192A (en) | 2020-03-12 | 2020-03-12 | Active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device |
| CN202020302762.8U CN211405010U (en) | 2020-03-12 | 2020-03-12 | Active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010170838.0A CN111193192A (en) | 2020-03-12 | 2020-03-12 | Active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device |
| CN202020302762.8U CN211405010U (en) | 2020-03-12 | 2020-03-12 | Active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device |
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| CN202020302762.8U Active CN211405010U (en) | 2020-03-12 | 2020-03-12 | Active lightning receiving type active pre-discharge lightning limiting type direct lightning protection device |
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