CN215990199U

CN215990199U - Lightning protector

Info

Publication number: CN215990199U
Application number: CN202121701757.5U
Authority: CN
Inventors: 罗佳俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-03-08
Anticipated expiration: 2031-07-23

Abstract

The utility model discloses a lightning protection device. The lightning protection protector comprises a shell, a grounding piece, a lightning protection structure and two joints, wherein the shell is provided with an accommodating cavity; the grounding piece is arranged in the accommodating cavity; the lightning protection structure comprises an impedance matching element and a bleeder component which are arranged in the accommodating cavity, wherein the first end of the bleeder component is connected with the impedance matching element, and the second end of the bleeder component is connected with the grounding piece; the two connectors are arranged on the shell and are electrically connected through the impedance matching element. The lightning protection protector can pass through direct current and reduce radio frequency signal attenuation.

Description

Lightning protector

Technical Field

The utility model relates to the technical field of radio frequency, in particular to a lightning protection device.

Background

The global satellite navigation system is widely applied to military, disaster prevention, daily life and other environments, a satellite receiving antenna with a signal amplifier is generally used for receiving weak satellite signals, in order to prevent the antenna from being struck by lightning, a radio frequency lightning protector is required to be installed for protection, and the signal amplifier needs direct current power supply for working. The traditional lightning protection protector can not be communicated with direct current and has large attenuation degree to radio frequency signals.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a lightning protection device which can pass direct current and reduce radio frequency signal attenuation.

In order to achieve the purpose, the lightning protection protector provided by the utility model comprises a shell, a grounding piece, a lightning protection structure and two joints, wherein the shell is provided with an accommodating cavity; the grounding piece is arranged in the accommodating cavity; the lightning protection structure comprises an impedance matching element and a bleeder component which are arranged in the accommodating cavity, wherein the first end of the bleeder component is connected with the impedance matching element, and the second end of the bleeder component is connected with the grounding piece; the two connectors are arranged on the shell and are electrically connected through the impedance matching element.

Optionally, the impedance matching element includes two connection segments and at least one deformation segment disposed between the two connection segments, and the two connectors are electrically connected to the two connection segments, respectively.

Optionally, the deformation section is arranged in a "U" shape.

Optionally, the bleeding assembly includes an adjustable coil and a bleeding element, one end of the adjustable coil is connected to the impedance matching element, the other end of the adjustable coil is connected to the first end of the bleeding element, and the second end of the bleeding element is connected to the grounding member.

Optionally, the number of the deformation sections is one, and one end of the adjustable coil is connected to one of the connection sections.

Optionally, the number of the deformation sections is two, and one end of the adjustable coil is welded between the two deformation sections.

Optionally, the bleeder component is a TVS or a varistor or a discharge tube.

Optionally, when the bleeder component is a TVS, the bleeder component includes a ground electrode, a connection electrode, and a semiconductor wafer clamped between the ground electrode and the connection electrode, the connection electrode is connected to the adjustable coil, and the ground electrode is connected to the ground member.

Optionally, the grounding electrode is provided with a crimping hole, and the grounding piece is arranged through the crimping hole to fix the grounding electrode to the shell.

Optionally, when the bleeder component is a varistor or a discharge tube, a bypass capacitor is connected in parallel to the bleeder component.

According to the technical scheme, the impedance matching element can pass through direct current, and the two connectors are electrically connected through the impedance matching element, so that the lightning protection protector can pass through direct current; the impedance matching element is used for matching impedance so as to reduce the attenuation of the lightning protector to radio frequency signals.

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 the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of a disassembled structure of an embodiment of the lightning protection device of the present invention;

FIG. 2 is a schematic diagram of the impedance matching device of FIG. 1;

FIG. 3 is a schematic view of the bleed element of FIG. 1;

FIG. 4 is a circuit diagram of an embodiment of the lightning protector of the utility model;

FIG. 5 is a circuit diagram of another embodiment of the lightning protector of the utility model;

FIG. 6 is a circuit diagram of another embodiment of the lightning protector of the utility model;

fig. 7 is a circuit diagram of a lightning protector according to another embodiment of the utility model.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The present invention provides a lightning protection device 100.

In the embodiment of the present invention, as shown in fig. 1-7, the lightning protection device 100 includes a housing 10, a grounding member 12, a lightning protection structure 20, and two connectors 30, wherein the housing 10 has a receiving cavity 11; the grounding piece 12 is arranged in the accommodating cavity 11; the lightning protection structure 20 includes an impedance matching element 21 and a bleeding assembly 22 disposed in the accommodating cavity 11, a first end of the bleeding assembly 22 is connected to the impedance matching element 21, and a second end of the bleeding assembly 22 is connected to the grounding member 12; two of the connectors 30 are provided in the housing 10, and the two connectors 30 are electrically connected by the impedance matching element 21.

Specifically, the casing 10 is made of aluminum, is low in cost, and is disposed in a cubic shape, and has a receiving cavity 11 therein for receiving and protecting the lightning protection structure 20 and the grounding member 12 disposed therein. The connector 30 is used to connect antenna terminals or device terminals, i.e. two connectors 30, one of which is connected to the antenna terminal and the other of which is connected to the device terminal. The lightning protection structure 20 is used to discharge the lightning current passing through the lightning protection device 100 to protect the rf antenna device, thereby effectively preventing the rf antenna device from being damaged by lightning.

It will be appreciated that at normal operating voltages (3-5 volts for the amplifier of the antenna), the value of the bleed assembly 22 approaches infinity, and the lightning protector 100 is considered to be isolated from ground. Therefore, in a normal operation state, a current is transmitted from the device terminal to the antenna terminal through the connector 30 connected to the device terminal, the impedance matching element 21, and the connector 30 communicating with the antenna terminal in this order, so that a driving current is output to the antenna terminal. The radio frequency signal is transmitted from the antenna terminal to the device terminal through the connector 30 communicating with the antenna terminal, the impedance matching element 21, and the connector 30 connected to the device terminal in this order, so as to receive the satellite signal. The voltage of the lightning is very large, and after the lightning current is introduced, the resistance of the bleeding component 22 approaches zero, and at this time, the lightning protection device 100 is regarded as conducting to the ground, and the lightning current is bled from the grounding component 12 to the ground through the bleeding component 22.

The lightning protection device 100 provided by the utility model adopts a shell 10 structure, and the lightning protection structure 20 is arranged in the accommodating cavity 11 of the shell 10, so that the waterproof grade of the lightning protection device 100 reaches IP67, and the lightning protection device can be directly installed outdoors. The parameters of the lightning protector 100 of the utility model can reach the standing-wave ratio of < 1.1: 1, insertion loss is less than 0.1dB, lightning current discharge capacity is 18kA, and residual energy is less than 170 nJ. Meanwhile, the characteristic impedance of the lightning protector 100 is 50 ohms. Optionally, the connector 30 of the lightning protector 100 may employ 7/16 connectors or N-type connectors or SMA connectors or F-type connectors or 4.3-10 connectors. In this embodiment, two connectors 30, one of which is an N-type female connector and the other of which is an SMA female connector.

According to the technical scheme of the utility model, the impedance matching element 21 can pass through direct current, and the two connectors 30 are electrically connected through the impedance matching element 21, so that the lightning protection protector 100 can pass through direct current; the impedance matching element 21 is used to match impedance to reduce attenuation of radio frequency signals by the lightning protector 100.

In an embodiment, as shown in fig. 2, the impedance matching element 21 includes two connection segments 211 and at least one deformation segment 212 disposed between the two connection segments 211, and the two connectors 30 are electrically connected to the two connection segments 211 respectively. Specifically, the connecting section 211 is a plate-like arrangement that facilitates connection with the fitting 30 or the vent assembly 22. The distribution parameters corresponding to the different shapes of the deformation sections 212 are different, and the distribution parameters (insertion loss, return loss and residual energy) of the lightning protection device 100 are adjusted by adjusting the shapes of the deformation sections 212, so that the 50-ohm characteristic impedance of the lightning protection device 100 is satisfied.

Further, as shown in fig. 2, the deformation section 212 is in a "U" shape. Specifically, in this embodiment, since the operating frequency band of the satellite receiving antenna is 1.2GHz-1.6GHz, the deformation section 212 is disposed in a "U" shape to correspond to the radio frequency signal in the frequency band. It is understood that in other embodiments, the morphed segment 212 may be shaped to match radio frequency signals of different frequency bands.

In one embodiment, as shown in fig. 1, the bleeding assembly 22 includes an adjustable coil 221 and a bleeding element 222, one end of the adjustable coil 221 is connected to the impedance matching element 21, the other end of the adjustable coil 221 is connected to a first end of the bleeding element 222, and a second end of the bleeding element 222 is connected to the grounding member 12.

Specifically, the adjustable coil 221 is used to adjust the distribution parameters of the lightning protection device 100, the adjustable coil 221 is wound by a single-stranded copper wire of 14AWG or 16AWG, and the rest parts except for two welding points are wrapped by insulating varnish. The number of winding turns, the outer diameter and the wire diameter of the adjustable coil 221 are all related to distribution parameters to be modulated. The resistance of the bleed element 222 at normal operating voltage approaches infinity; when a lightning overvoltage occurs, the resistance of the bleeder element 222 approaches zero, and the lightning current is discharged to the ground through the bleeder element 222 and the ground member 12.

In one embodiment, as shown in fig. 4, 6 and 7, the number of the deformation segments 212 is one, and one end of the adjustable coil 221 is connected to one of the connection segments 211. Specifically, in the embodiment in which the lightning protection device 100 is unidirectionally protected, the adjustable coil 221 is welded to the connection section 211 connected to the antenna terminal, and thus the antenna terminal is connected to the connector 30 welded to the adjustable coil 221 when the lightning protection device 100 is connected.

In one embodiment, as shown in fig. 5, the number of the deformation sections 212 is two, and one end of the adjustable coil 221 is welded between the two deformation sections 212. Specifically, the adjustable coil 221 is soldered at the connection point of the two deformation sections 212, so that the lightning protection device 100 is bi-directional protection, i.e. when the lightning protection device 100 is connected, it is not necessary to distinguish whether the connector 30 is used for connecting an antenna terminal or an equipment terminal.

In an embodiment, as shown in fig. 3 to fig. 5, the bleeder component 222 is a TVS, the bleeder component 222 includes a ground electrode 223, a connection electrode 224, and a semiconductor wafer 225 sandwiched between the ground electrode 223 and the connection electrode 224, the connection electrode 224 is connected to the adjustable coil 221, and the ground electrode 223 is connected to the ground member 12.

Specifically, the normal operating voltage of the main path (both ends of the impedance matching element 21 are connected to the two connectors 30, respectively) is less than the reverse breakdown voltage of the TVS, so that during normal operation, the main path and the discharging assembly 22 are insulated from ground, and when a lightning overvoltage occurs, the voltage in the main path is much higher than the normal operating voltage, so that the TVS is in reverse breakdown, and at this time, the TVS is changed from the insulated state to the conductive state to discharge the lightning to flow into the ground. Both the connection electrode 224 and the ground electrode 223 are metallic copper nickel-plated electrodes, and in the present embodiment, the connection electrode 224 is provided in a square sheet shape, and the ground electrode 223 is provided in a semicircular sheet shape. It is understood that in other embodiments, the connecting electrode 224 and the grounding electrode 223 may be disposed in other shapes, which is not limited herein. Alternatively, when one TVS cannot satisfy the voltage requirement, a plurality of TVSs may be connected in series.

Further, as shown in fig. 3, the ground electrode 223 is provided with a crimping hole 226, and the ground member 12 is inserted through the crimping hole 226 to fix the ground electrode 223 to the housing 10. Specifically, the ground member 12 is a ground bolt which fastens the ground electrode 223 to the bottom of the receiving cavity 11 of the shell 10 through the crimp hole 226 and discharges the lightning current to the ground through the shell 10.

In another embodiment, as shown in fig. 6 and 7, the bleeder element 222 is a varistor (MOV) or a discharge tube (GDT). Specifically, the varistor and the discharge tube are the same as the TVS, and both have a resistance value that changes from an original resistance value approaching infinity to a resistance value approaching zero when the voltage reaches the threshold value, so the principle of using the varistor or the discharge tube as the bleeder component 222 is the same as the principle of the TVS in the above embodiment, and will not be described herein again. Further, the bleeder component 222 is connected in parallel with a bypass capacitor 227, the varistor or the discharge tube itself has a higher parasitic capacitance, and the capacitance value of the shunt capacitor 227 arranged in parallel is smaller than the parasitic capacitance of the varistor or the discharge tube itself.

In an embodiment, as shown in fig. 1, the housing 10 includes a main body 13 and a cover plate 14, the main body 13 has the accommodating cavity 11, and the main body 13 is opened with an installation opening 111 communicating with the accommodating cavity 11; the cover plate 14 is detachably covered on the mounting opening 111; one end of each of the two connectors 30 extends into the cavity through the main body 13 and is connected to the impedance matching element 21.

Specifically, by arranging the housing 10 as two parts of the main body 13 and the cover plate 14, the cover plate 14 is detachably covered on the mounting opening 111 of the main body 13, so that the lightning protection structure 20 and the grounding piece 12 are conveniently mounted in the cavity of the main body 13 through the mounting opening 111, and the cover plate 14 is used for realizing sealing mounting, thereby improving the convenience in use of the lightning protection device 100. Meanwhile, when the lightning protection structure 20 is in trouble or needs to be adjusted and replaced, the operations such as maintenance or replacement can be realized by detaching the cover plate 14, and meanwhile, the yield of production is effectively improved.

Further, as shown in fig. 1, a plurality of screw holes 131 are formed on the main body 13 around the mounting opening 111, a plurality of through holes 141 corresponding to the positions of the screw holes 131 are formed on the cover plate 14, and screws 17 pass through the through holes 141 and are connected with the screw holes 131, so that the cover plate 14 is covered on the mounting opening 111.

In an embodiment, as shown in fig. 1, the two opposite sides of the main body 13 are respectively provided with a mounting hole 112 communicating with the accommodating cavity 11, the two connectors 30 are respectively a first connector 31 and a second connector 32, one end of the first connector 31 is inserted into one of the mounting holes 112 and connected to one end of the impedance matching element 21, and one end of the second connector 32 is inserted into the other mounting hole 112 and connected to the other end of the impedance matching element 21.

Specifically, one end of the first connector 31 is connected to the antenna end, and the other end is inserted into a mounting hole 112 and extends into the accommodating cavity 11 to be connected to a connecting section 211 of the impedance matching element 21, one end of the second connector 32 is connected to the device end, and the other end is inserted into another mounting hole 112 and extends into the accommodating cavity 11 to be connected to another connecting section 211 of the impedance matching element 21. One ends of the first and

second terminals

31 and 32 are each provided with a contact 33, and the first and

second terminals

31 and 32 are each welded to the connection section 211 of the impedance matching element 21 through the contact 33.

In an embodiment, as shown in fig. 1, the main body 13 is provided with a first groove 132 surrounding the installation opening 111, and the lightning protection device 100 further includes a first sealing ring 15, wherein the first sealing ring 15 is accommodated and limited in the first groove 132 and abuts against the cover plate 14.

Specifically, through set up annular first recess 132 at the periphery of installing port 111, utilize first sealing washer 15 to hold and spacing in first recess 132, when apron 14 lid closes installing port 111, first sealing washer 15 seals the butt with apron 14 to improve the leakproofness of installing port 111 department, make lightning protection device 100 have good waterproof performance.

In an embodiment, as shown in fig. 1, the main body 13 is provided with a second groove 133 surrounding each mounting hole 112, and the lightning protection device 100 further includes two second sealing rings 16, each second sealing ring 16 is accommodated and limited in each second groove 133, and abuts against the first joint 31 or the second joint 32, so as to satisfy the waterproof performance.

Specifically, by providing the annular second groove 133 at the periphery of the mounting hole 112, the second sealing ring 16 is accommodated and limited in the second groove 133, and when the first joint 31 or the second joint 32 is inserted into the mounting hole 112, the second sealing ring 16 is in sealing abutment with the first joint 31 or the second joint 32, so as to improve the sealing property at the mounting hole 112, and the lightning protection protector 100 has good waterproof property.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A lightning protection device, comprising:

a housing having an accommodating chamber;

the grounding piece is arranged in the accommodating cavity;

the lightning protection structure comprises an impedance matching element and a bleeder component which are arranged in the accommodating cavity, wherein the first end of the bleeder component is connected with the impedance matching element, and the second end of the bleeder component is connected with the grounding piece; and

the two connectors are arranged on the shell and are electrically connected through the impedance matching element;

the impedance matching element comprises two connecting sections and at least one deformation section arranged between the two connecting sections, the two connectors are respectively and electrically connected with the two connecting sections, and the deformation section is arranged in a U shape.

2. The lightning protection device of claim 1, wherein the bleed assembly includes an adjustable coil and a bleed element, one end of the adjustable coil being coupled to an impedance matching element, another end of the adjustable coil being coupled to a first end of the bleed element, and a second end of the bleed element being coupled to the ground.

3. The lightning protection device of claim 2 wherein the number of deformation segments is one and one end of the adjustable coil is connected to one of the connection segments.

4. The lightning protection device of claim 2 wherein the number of deformation segments is two and the adjustable coil is welded at one end between the two deformation segments.

5. The lightning protection device of any one of claims 2-4 wherein the bleeding element is a TVS or a varistor or a discharge tube.

6. The lightning protection device of claim 5, wherein when the bleeder component is a TVS, the bleeder component comprises a ground electrode, a connection electrode, and a semiconductor wafer sandwiched between the ground electrode and the connection electrode, the connection electrode is connected to the adjustable coil, and the ground electrode is connected to the ground member.

7. The lightning protection device of claim 6 wherein the ground electrode is provided with a crimp hole, the ground member being disposed through the crimp hole to secure the ground electrode to the housing.

8. The lightning protection device of claim 5 wherein a shunt capacitor is connected in parallel with the bleed element when the bleed element is a varistor or a discharge tube.