CN212114295U

CN212114295U - Direct-lightning-strike prevention device for radar

Info

Publication number: CN212114295U
Application number: CN202021054066.6U
Authority: CN
Inventors: 陈金华; 陈俊良; 童志
Original assignee: Huarui Commscope Lightning Protection Technology Wuhan Co ltd
Current assignee: Huarui Commscope Lightning Protection Technology Wuhan Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-12-08
Anticipated expiration: 2030-06-10

Abstract

The utility model provides a radar direct-strike prevention device, include from the last arrester, the electric charge that down connects gradually and gather utmost point, conducting rod subassembly, first conducting component, charge elimination subassembly and bracing piece subassembly, still be provided with between charge elimination subassembly and the bracing piece subassembly and draw the ground device down. The utility model discloses a radar direct-strike prevention device is under the effect of thundercloud electric field, and the guide's electric subassembly starts, and it is free to produce strong electricity through arrester, charge gathering utmost point and conducting rod subassembly top, forms the head-on guide to upwards develop rapidly, join with down guide, with the guide's passageway orbit of charge according to above-mentioned confirmation in the cloud, and discharge to the ground through charge elimination subassembly and draw down ground device etc.. Because the utility model discloses there is the function that the guide produced that is met to the above-mentioned excitation, compare with the lightning rod of same height and have the function of discharging in advance, avoid causing the counterattack to the radar, guarantee radar safe operation.

Description

Direct-lightning-strike prevention device for radar

Technical Field

The utility model relates to a lightning protection technical field especially relates to a radar direct-strike prevention thunder device.

Background

Doppler radar is the most advanced radar device in the world at present, and is adopted in China in meteorology, aviation, radio and television, national defense and the like. The Doppler radar is mostly installed at the top ends of high mountains and high buildings, a radar antenna and weak current equipment are easily struck by lightning, and 30% of radar faults at home and abroad are caused by the lightning at present, so that the radar lightning protection is an important guarantee for ensuring the safe operation of the radar.

The conventional method for protecting radar from direct lightning strike is to use a lightning rod to attract lightning and discharge the lightning current to the ground through a down conductor and a grounding device. Such a method has the following drawbacks: the protection range of the lightning rod is small and uncertainty exists; when the rising gradient is extremely high and lightning current with amplitude of dozens to hundreds of kiloamperes flows through the lightning rod, the potentials of the needle body, the down conductor and the grounding body are suddenly increased, so that counterattack to the radar is caused. Meanwhile, the induced electromagnetic field formed by strong lightning current flowing through the lightning rod in the peripheral space can cause misoperation and damage of the radar, so that the radar fails, and huge loss is easily caused when the radar is serious; when lightning strike is borne, the traditional lightning rod and other lightning rods have the defects inevitably.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a radar direct attack lightning protection device to solve the problem that exists among the background art.

The technical scheme of the utility model is realized like this: the utility model provides a radar direct-strike prevention device, include from the last arrester, the electric charge that down connects gradually and gather utmost point, conducting rod subassembly, first conducting component, charge elimination subassembly and bracing piece subassembly, still be provided with between charge elimination subassembly and the bracing piece subassembly and draw the ground device down.

On the basis of the above technical scheme, preferably, the upper end of the charge accumulation electrode is a streamline arc surface.

On the basis of the technical scheme, preferably, the conducting rod assembly comprises a connecting seat and a plurality of conducting rods, the connecting seat is fixedly arranged on the lower end face of the charge gathering pole, and the conducting rods are uniformly distributed around the central shaft of the lightning arrester.

On the basis of the technical scheme, preferably, the pilot electric component comprises a spherical shell, a pilot element, a first conductive fitting, a second conductive fitting and an insulating ring, the spherical shell is arranged at the bottom of the connecting seat, the pilot element is arranged inside the spherical shell, the top end and the bottom end of the spherical shell are respectively nested with the insulating ring, the top end of the pilot element is connected with the first conductive fitting, the first conductive fitting penetrates through the insulating ring arranged at the top end of the spherical shell and is connected with the connecting seat, the bottom end of the pilot element is connected with the second conductive fitting, and the second conductive fitting penetrates through the insulating ring arranged at the bottom end of the spherical shell and is connected with the charge eliminating assembly.

Further, preferably, the pilot element comprises a plurality of graphite sheets and polytetrafluoroethylene sheets, and the graphite sheets and the polytetrafluoroethylene sheets are alternately stacked.

On the basis of the technical scheme, it is preferred, the charge elimination assembly includes safety cover, high energy electronic switch and voltage switch type surge protector, the safety cover sets up in the spherical shell below, and for insulating material, high energy electronic switch and voltage switch type surge protector all set up in the safety cover, and high energy electronic switch and voltage switch type surge protector's both ends are connected with first link fitting and second link fitting respectively, and first link fitting is connected with the electrically conductive gold utensil of second, and the electrically conductive gold utensil bottom of second is connected with and leads electrical pillar, it passes the safety cover bottom and is connected with the bracing piece subassembly to lead electrical pillar.

On the basis of the above technical solution, preferably, an annular electrostatic shielding electrode is further fixedly disposed on the conductive rod below the protective cover.

On the basis of the technical scheme, preferably, the support rod assembly comprises a fixed base and a plurality of sections of support rods which are sequentially connected, the support rods are made of glass fiber reinforced plastic materials, the diameters of the support rods are sequentially decreased from top to bottom, the support rods are connected through insulating sleeves, the support rod at the topmost end is connected with the conductive posts, and the support rod at the lowest end is connected with the fixed base.

On the basis of the technical scheme, preferably, the downlead grounding device comprises a downlead and a plurality of pin insulators, one end of the downlead is connected with the conductive column, the other end of the downlead is connected with the fixed base, the pin insulators are fixedly installed on the supporting rod at intervals, and the downlead sequentially penetrates through the pin insulators and is fixedly connected with the pin insulators.

The utility model discloses following beneficial effect has for prior art:

the utility model discloses a radar direct attack lightning arrester through setting up arrester, electric charge gathering utmost point and conducting rod subassembly, can not equidirectional, the efficient thundercloud electric current in the air of attraction, makes the lightning-arrest scope more extensive of anti-direct attack lightning arrester. When thundercloud generates a downlink pilot, under the action of a thundercloud electric field, a pilot element in the spherical shell is started, the lightning receptor, the charge gathering pole and the conducting rod assembly generate strong electric dissociation to form a head-on pilot, the head-on pilot rapidly develops upwards and is converged with the downlink pilot, charges in the cloud are guided by the determined pilot channel track, the electrode accumulates positive charges under the action of the strong electric field of the downlink pilot generated by the charged thundercloud to the ground, when the positive charges accumulated by the electrode enable the potential difference of the electrode to the ground to reach the set voltage value of the high-energy electronic switch in the charge eliminating assembly, the high-energy electronic switch is closed, negative charges are filled into the electrode from the ground through the grounding device, and the positive charges in the electrode are neutralized, namely, the generation of downlink pilot discharge is avoided, the direct lightning strike in a protective field is further avoided, and the damage to the radar is reduced. Because the utility model discloses there is the function that the guide produced that is met to the above-mentioned excitation, compare with the lightning rod of same height and have the function of discharging in advance, avoid causing the counterattack to the radar, guarantee radar safe operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 creative efforts.

Fig. 1 is a schematic plan view of a radar direct-strike protection device disclosed by the present invention;

FIG. 2 is a schematic plan view of the lightning receptor, the charge collector and the conductive rod assembly of the present invention;

fig. 3 is a schematic plan structure view of the pilot electrical component disclosed in the present invention;

fig. 4 is a schematic plan view of the charge eliminating assembly of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in FIG. 1, the embodiment of the utility model discloses radar anti-direct-strike device, include from the last arrester 1, the electric charge that down connects gradually 2, conducting rod subassembly 3, guide's electric subassembly 4, electric charge elimination subassembly 5 and bracing piece subassembly 6. A down grounding device 7 is also arranged between the charge eliminating assembly 5 and the supporting rod assembly 6.

The lightning receptor 1, the charge collector 2 and the conductive rod assembly 3 are used for receiving thundercloud current, the pilot electric assembly 4, the charge eliminating assembly 5 and the pilot grounding device 7 are used for discharging in advance, and the support rod assembly 6 is used for erecting the radar direct lightning protection device to the high altitude.

By adopting the technical scheme, when thundercloud generates a downlink pilot, the pilot electric component 4 is started under the action of a thundercloud electric field, the lightning receptor 1, the charge gathering electrode 2 and the conducting rod component 3 generate strong electric dissociation to form a head-on pilot, the head-on pilot rapidly develops upwards and is converged with the downlink pilot, charges in the cloud are converged according to the determined pilot channel track, positive charges are accumulated on the electrode under the action of the high electric field of the downlink pilot generated by the charged thundercloud to the ground, when the potential difference of the positive charges accumulated on the electrode to the ground reaches the set voltage value in the charge eliminating component 5, the charge eliminating component 5 is started, the electrode is filled from the ground through the grounding device 7, and the positive charges in the electrode are neutralized, namely, the generation of the downlink pilot discharge is avoided, the generation of direct lightning in a protection site is further avoided, and the damage to the radar is reduced. Because the utility model discloses there is the function that the guide produced that is met to the above-mentioned excitation, compare with the lightning rod of same height and have the function of discharging in advance, avoid causing the counterattack to the radar, guarantee radar safe operation.

Referring to figure 2 of the drawings, wherein the lightning receptor 1 is for receiving high and medium altitude thundercloud current, is a metal tube with a conical upper end and a threaded lower end for connection, and is made of stainless steel.

The charge collector 2 is a metal electrode and is also used for receiving thundercloud current in high altitude, the upper end of the charge collector 2 is a streamline cambered surface, the reserve of positive charges accumulated by the electrode under the action of a strong electric field of a downlink pilot generated by charged thundercloud to the ground can be increased, and the discharge capacity of the neutral and downlink pilot can be improved.

The conducting rod assembly 3 is also used for receiving thundercloud current in the air, the conducting rod assembly 3 comprises a connecting seat 31 and a plurality of conducting rods 32, the connecting seat 31 is fixedly arranged on the lower end face of the charge gathering electrode 2, and the conducting rods 32 are uniformly distributed around the central shaft of the lightning receptor 1. Therefore, the lightning current can be received in different directions by the plurality of conductive rods 32 annularly arranged around the lightning receptor 1, so that the lightning receiving range is improved.

Referring to fig. 3, the pilot electrical assembly 4 includes a spherical shell 41, a pilot element 42, a first conductive fitting 43, a second conductive fitting 44, and an insulating ring 45, the spherical shell 41 is disposed at the bottom of the connection seat 31, the spherical shell 41 is made of stainless steel and is used for protecting the pilot element 42, the pilot element 42 is disposed inside the spherical shell 41, the top end and the bottom end of the spherical shell 41 are respectively nested with the insulating ring 45, the top end of the pilot element 42 is connected with the first conductive fitting 43, the first conductive fitting 43 passes through the insulating ring 45 disposed at the top end of the spherical shell 41 and is connected with the connection seat 31, the bottom end of the pilot element 42 is connected with the second conductive fitting 44, and the second conductive fitting 44 passes through the insulating ring 45 disposed at the bottom end of the spherical shell 41 and is connected with the charge eliminating assembly 5.

By adopting the above technical scheme, the top end and the bottom end of the spherical shell 41 are respectively embedded with the insulating rings 45, so that the spherical shell 41 can be electrically insulated from the connecting seat 31 in the conducting rod assembly 3, and the spherical shell 41 can be electrically insulated from the charge eliminating assembly 5. The pilot element 42 in this embodiment comprises several graphite sheets 421 and teflon sheets 422, the graphite sheets 421 and the teflon sheets 422 being alternately stacked. On one hand, by arranging the pilot element 42, when the thundercloud generates a descending pilot, under the action of a thundercloud electric field, the pilot element 42 in the spherical shell 41 is started, the lightning receptor 1, the charge gathering electrode 2 and the top of the conducting rod assembly 3 generate strong electricity dissociation to form a head-on pilot, the head-on pilot rapidly develops upwards and is converged with the descending pilot, and the charge in the cloud is discharged to the ground according to the determined pilot channel track and passes through the charge eliminating assembly 5, the grounding device 7 and the like. Because the utility model discloses there is the function that the guide produced that the aforesaid arouses to meet, compare with the lightning rod of the same height and have the function of discharging in advance, have bigger protection scope. On the other hand, the graphite sheet 421 and the polytetrafluoroethylene sheet 422 are made of high polymer materials, and because the lightning current passes through the current-limiting body made of the semiconductive high polymer material and having a certain resistance and voltage-withstanding level, the main discharging process of the lightning is greatly weakened, and the amplitude and gradient of the lightning current are limited to an extremely low level.

Referring to fig. 4, the charge eliminating assembly 5 includes a protective cover 51, a high-power electronic switch 52, and a voltage switching type surge protector 53. The protective cover 51 is disposed below the spherical shell 41, is made of an insulating material, and is preferably made of epoxy resin. The protective cover 51 protects the high-power electronic switch 52 and the voltage switching surge protector 53. The high-energy electronic switch 52 and the voltage switch type surge protector 53 are both arranged in the protective cover 51, two ends of the high-energy electronic switch 52 and the voltage switch type surge protector 53 are respectively connected with a first connecting hardware fitting 54 and a second connecting hardware fitting 55, the first connecting hardware fitting 54 is connected with the second conductive hardware fitting 44, the bottom of the second connecting hardware fitting 55 is connected with a conductive column 56, and the conductive column 56 penetrates through the bottom of the protective cover 51 and is connected with the supporting rod assembly 6.

By adopting the technical scheme, the high-energy electronic switch 52 is in a normally open state in the initial state, and when the potential difference between the lightning receptor 1, the charge accumulation electrode 2, the conducting rod assembly 3 and the down-leading grounding device 7 reaches the set value of the high-energy electronic switch 52, the high-energy electronic switch 52 is closed. When the radar direct-lightning-strike prevention device is used, the radar direct-lightning-strike prevention device is installed in a radar protection field, the lower grounding device 7 is grounded, positive charges are accumulated on the electrodes under the action of a strong electric field of a downlink pilot generated by charged thunderclouds to the ground, when the potential difference of the positive charges accumulated on the electrodes to the ground reaches a set voltage value of the high-energy electronic switch 52, the high-energy electronic switch 52 is closed, negative charges are filled into the electrodes from the ground through the lower grounding device 7, the positive charges in the electrodes are neutralized, namely, the generation of downlink pilot discharge is avoided, and the generation of direct lightning in the protection field is further avoided; after the electric charge neutralization takes place, the potential difference of the electrode to the ground is less than the setting value of high-energy electronic switch 52, high-energy electronic switch 52 automatic shutoff, after above process, the electrode gets back to initial condition again, the charge accumulation of next time begins to carry out again, because high-energy electronic switch 52's switching speed (nanosecond level) is far faster than the speed (microsecond level) that down guide removed, high-energy electronic switch 52 has enough time to repeat the down guide that has blocked probably appearing again in the thundercloud and discharges, so circulate, the utility model discloses automatic and the evolution of having restrained the thunderbolt effectively, eliminated the production of lightning.

The voltage switch type surge protector 53 is adopted to be connected with the high-energy electronic switch 52 in parallel, the voltage switch type surge protector 53 is high impedance when no surge occurs, and is low impedance when voltage surge occurs, just because of the characteristic, when super-strong lightning occurs, the impedance of the voltage switch type surge protector 53 becomes low and is conducted with the high-energy electronic switch 52 together, so that the high-energy electronic switch 52 is protected, and the danger that the high-energy electronic switch 52 is punctured when the super-strong lightning occurs is avoided.

An annular electrostatic shielding electrode 57 is also fixedly disposed on the conductive rod 32 below the protective cover 51. When the thunder occurs, the occurrence of ultra-strong thunder occasionally occurs, if the radar direct lightning protection device cannot be well protected under the condition of the ultra-strong thunder, once the ultra-strong thunder occurs, the radar direct lightning protection device is directly damaged and loses the lightning protection effect, so in the application, the inventor also sets an annular electrostatic shielding electrode 57, and aims to ensure that when the ultra-strong thunder occurs, if the intensity is large enough and exceeds the current flow capacity acted by the high-energy electronic switch 52 and the voltage switch type surge protector 53 together, the high-energy electronic switch 52 and the voltage switch type surge protector 53 are both possibly damaged by breakdown, so in the application, the annular electrostatic shielding electrode 57 is set, when the above conditions occur, the flashover between the electrode and the annular electrostatic shielding electrode 57 directly occurs, so the shunting is carried out, and the high-energy electronic switch 52 and the voltage switch type surge protector 53 are prevented from being broken down, and then further improved the reliability of this application's radar anti-direct attack thunder device.

Referring to fig. 1, in this embodiment, bracing piece subassembly 6 is used for erectting this radar direct attack prevention device to the high altitude, and it includes fixed baseplate 61 and multisection branch 62 that links to each other in proper order, and branch 62 is the glass steel material, each branch 62 from last down the diameter decrease progressively in proper order, and the reducing setting can reduce the utilization of material, and reduce cost adopts the glass steel material, can not produce the interference to the radar echo, and it not only has the direct attack prevention effect, has corrosion-resistant, the advantage of ageing resistance moreover, and simultaneously, the branch 62 annex of glass steel material does not receive the ionization radiation. The struts 62 are connected through an insulating sleeve 63, and the insulating sleeve 63 can tightly connect two adjacent struts 62 by adopting a threaded connection mode. The topmost strut 62 is connected to the conductive post 56, and the bottommost strut 62 is connected to the fixed base 61.

Referring to fig. 1, the down conductor grounding device 7 includes a down conductor 71 and a plurality of pin insulators 72, one end of the down conductor 71 is connected to the conductive column 56, the other end is connected to the fixing base 61, the pin insulators 72 are fixedly mounted on the supporting rod 62 at intervals, and the down conductor 71 sequentially passes through the pin insulators 72 and is fixedly connected to the pin insulators 72. By adopting the technical scheme, the pin insulator 72 can be connected with the support rod 62 through the hoop, and the pin insulator 72 is adopted, so that the down lead 71 is fixed on one hand, and the insulating effect is realized on the other hand. The down conductor 71 is made of a copper wire, the down conductor 71 is connected with the fixed base 61, and lightning current can be introduced into the underground, so that damage to radar products is avoided.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a radar anti-direct-strike lightning device, its characterized in that includes from last arrester (1), charge gathering pole (2), conducting rod subassembly (3), first conducting component (4), charge elimination subassembly (5) and bracing piece subassembly (6) that down connect gradually, still be provided with between charge elimination subassembly (5) and bracing piece subassembly (6) and draw ground device (7).

2. A radar anti-direct lightning device according to claim 1, characterised in that: the upper end of the charge accumulation electrode (2) is a streamline cambered surface.

3. A radar anti-direct lightning device according to claim 2, characterised in that: the conducting rod assembly (3) comprises a connecting seat (31) and a plurality of conducting rods (32), the connecting seat (31) is fixedly arranged on the lower end face of the charge gathering electrode (2), and the conducting rods (32) are uniformly distributed around the central shaft of the lightning arrester (1).

4. A radar anti-direct lightning device according to claim 3, characterised in that: the first conductive assembly (4) comprises a spherical shell (41), a pilot element (42), a first conductive fitting (43), a second conductive fitting (44) and an insulating ring (45), the spherical shell (41) is arranged at the bottom of the connecting seat (31), the pilot element (42) is arranged inside the spherical shell (41), the top end and the bottom end of the spherical shell (41) are respectively nested with the insulating ring (45), the top end of the pilot element (42) is connected with the first conductive fitting (43), the first conductive fitting (43) penetrates through the insulating ring (45) arranged at the top end of the spherical shell (41) and is connected with the connecting seat (31), the bottom end of the pilot element (42) is connected with the second conductive fitting (44), and the second conductive fitting (44) penetrates through the insulating ring (45) arranged at the bottom end of the spherical shell (41) and is connected with the charge eliminating assembly (5).

5. The radar anti-direct lightning device according to claim 4, wherein: the pilot element (42) comprises a plurality of graphite sheets (421) and polytetrafluoroethylene sheets (422), and the graphite sheets (421) and the polytetrafluoroethylene sheets (422) are alternately stacked.

6. The radar anti-direct lightning device according to claim 4, wherein: the charge eliminating assembly (5) comprises a protective cover (51), a high-energy electronic switch (52) and a voltage switch type surge protector (53), wherein the protective cover (51) is arranged below the spherical shell (41) and is made of an insulating material, the high-energy electronic switch (52) and the voltage switch type surge protector (53) are arranged in the protective cover (51), two ends of the high-energy electronic switch (52) and the voltage switch type surge protector (53) are respectively connected with a first connecting fitting (54) and a second connecting fitting (55), the first connecting fitting (54) is connected with a second conducting fitting (44), the bottom of the second connecting fitting (55) is connected with a conducting pillar (56), and the conducting pillar (56) penetrates through the bottom of the protective cover (51) and is connected with the support rod assembly (6).

7. The radar anti-direct lightning device according to claim 6, wherein: and an annular electrostatic shielding electrode (57) is also fixedly arranged on the conductive rod (32) below the protective cover (51).

8. The radar anti-direct lightning device according to claim 6, wherein: the utility model discloses a support pole subassembly, including support pole subassembly (6) and multisection consecutive branch (62), branch (62) are the glass steel material, each branch (62) from last down the diameter decrease gradually in proper order, connect through insulating sleeve (63) between each branch (62), topmost branch (62) are connected with leading electrical pillar (56), and least significant branch (62) are connected with fixed baseplate (61).

9. A radar anti-direct lightning device according to claim 8, characterised in that: the down-lead grounding device (7) comprises a down-lead (71) and a plurality of pin insulators (72), one end of the down-lead (71) is connected with the conductive column (56), the other end of the down-lead is connected with the fixed base (61), the pin insulators (72) are fixedly installed on the supporting rod (62) at intervals, and the down-lead (71) sequentially penetrates through the pin insulators (72) and is fixedly connected with the pin insulators (72).