CN111431160B - DC blocker - Google Patents
DC blocker Download PDFInfo
- Publication number
- CN111431160B CN111431160B CN202010518476.XA CN202010518476A CN111431160B CN 111431160 B CN111431160 B CN 111431160B CN 202010518476 A CN202010518476 A CN 202010518476A CN 111431160 B CN111431160 B CN 111431160B
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- inductor
- shell
- copper sheet
- jack
- grounding plate
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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
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a direct current blocker, wherein a first inductor, a second inductor, a third inductor, a first grounding plate and a second grounding plate are fixedly arranged on a PCB in a first cavity, one end of the first inductor is connected with a jack, the other end of the first inductor is connected with one end of the second inductor through a first copper sheet, the other end of the second inductor is connected with one end of the third inductor through a second copper sheet, the first grounding plate is connected with a first copper sheet through a first capacitor, the second grounding plate is connected with a second copper sheet through a second capacitor, a fourth inductor, a third grounding plate and a fourth grounding plate are fixedly arranged on the PCB in a third cavity, a gas tube is fixedly arranged on the fourth grounding plate, the other end of the third inductor passes through the second cavity and then is connected with one end of the fourth inductor through the third copper sheet, the other end of the fourth inductor is connected with the gas tube through the fourth copper sheet, the third copper sheet is connected with the third grounding plate through the third capacitor, and the fourth copper sheet is connected with the third grounding plate through a fourth capacitor. The lightning protection method can prevent lightning and simultaneously avoid influencing PIM parameters.
Description
Technical Field
The invention relates to the technical field of communication equipment, in particular to a direct current blocker.
Background
The direct current blocker is a direct current blocking device, and is mainly applied to a leaky cable in a tunnel wireless distribution system adopting the leaky cable. Structurally, a dc-block can be seen as a high voltage tolerant capacitor. The lightning arrester is an electrical device which can release thunder and lightning or release overvoltage energy for operating an electric power system, protect electrical equipment from being damaged by instantaneous overvoltage, and cut off follow current without causing short circuit of system grounding. The arrester is usually connected between the live conductor and ground in parallel with the equipment to be protected. When the overvoltage value reaches the specified action voltage, the lightning arrester immediately acts, charges flow through, the overvoltage amplitude is limited, and the equipment is protected from being insulated; after the voltage value is normal, the lightning arrester is rapidly restored to the original state so as to ensure normal power supply of the system. In a circuit with a compact installation space, a direct current blocking device and a lightning arrester are generally combined for use, for example, chinese patent No. 201110043897.2 discloses a direct current blocking type low residual voltage gas tube lightning arrester, in which a gas tube is used to form an electric short circuit, thereby reducing residual voltage and playing a role of lightning protection. However, the electrode of the gas tube is made of iron-nickel alloy, and if the electrode exists, the electrode has a magnetic field, and the magnetic field interferes with signals of the whole electric field to influence PIM parameters.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems that a gas tube is used in the existing direct current blocking type lightning arrester, an electrode of the gas tube is made of iron-nickel alloy, and if the electrode is made of iron-nickel alloy, a magnetic field exists, the magnetic field interferes with signals of the whole electric field, and PIM parameters are influenced, a direct current blocking device is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a direct current blocker comprises a shell with a signal input end and a signal output end, wherein jacks are arranged in the shell and penetrate through the signal input end and the signal output end, PCB boards are fixedly installed in the shell, the inner cavity of the shell is divided into a first cavity, a second cavity and a third cavity by the two PCB boards, the jacks penetrate through the second cavity, the first cavity and the third cavity are respectively positioned at two sides of the second cavity, a first inductor, a second inductor, a third inductor, a first ground plate and a second ground plate are fixedly installed on the PCB board in the first cavity, one end of the first inductor is connected with the jacks, the other end of the first inductor is connected with one end of the second inductor through a first copper sheet, the other end of the second inductor is connected with one end of the third inductor through a second copper sheet, the first ground plate is connected with the first copper sheet through a first capacitor, the second ground plate is connected with the second copper sheet through a second capacitor, a fourth inductor, a third ground plate and a fourth ground plate are fixedly mounted on the PCB in the third chamber, a gas tube is fixedly mounted on the fourth ground plate, the other end of the third inductor penetrates through the second chamber and then is connected with one end of the fourth inductor through a third copper sheet, the other end of the fourth inductor is connected with the gas tube through a fourth copper sheet, the third copper sheet is connected with the third ground plate through a third capacitor, and the fourth copper sheet is connected with the third ground plate through a fourth capacitor.
The direct current blocker of the invention uses a first inductor, a second inductor, a third inductor and a fourth inductor to form a fourth-order filter circuit, the first inductor, the second inductor and the third inductor are all positioned in a first chamber, then, a first-order circuit, a second-order circuit and a third-order circuit are all positioned in the first chamber to form a filter part, a fourth inductor is positioned in a third chamber, then, the fourth-order circuit is positioned in the third chamber, a gas pipe is placed in the fourth-order circuit to form a lightning protection part, physical lightning protection can be realized, the filter part and the lightning protection part are separated, PIM parameters can be prevented from being influenced while lightning protection is realized, and the direct current blocker of the invention is mainly used for 4G antennas and can also be used for indoor distribution systems of leakage cables.
In order to support the two PCB boards, an insulator is sleeved outside an inductor straight line penetrating through the second cavity on the third inductor, and the insulator is connected with the two PCB boards.
Further, the jack includes preceding jack and back jack, preceding jack passes through the signal input part of the coaxial fixed mounting of female insulator at the shell, the signal output part of back jack through the coaxial fixed mounting of back insulator at the shell, preceding jack and back jack are connected through insulating cover, the one end and the preceding jack connection of first inductance.
Furthermore, a front shell is fixedly installed in the signal input end of the shell, and the front shell and the front jack are coaxially arranged.
Furthermore, a nut is installed on the external thread of the signal input end of the shell, and an O-shaped ring is coaxially and fixedly installed on the nut.
In order to facilitate the welding of the cable, a rear shell is fixedly mounted on the shell, is positioned right below the signal output end of the shell and is arranged in parallel with the signal output end of the shell.
The direct current blocker has the advantages that the first inductor, the second inductor, the third inductor and the fourth inductor are used for forming a fourth-order filter circuit, the first inductor, the second inductor and the third inductor are all located in the first cavity, then the first-order circuit, the second-order circuit and the third-order circuit are all located in the first cavity to form a filter part, the fourth inductor is located in the third cavity, then the fourth-order circuit is located in the third cavity, the gas pipe is placed in the fourth-order circuit to form a lightning protection part, physical lightning protection can be achieved, the filter part and the lightning protection part are separated, PIM parameters can be avoided being influenced while lightning protection is achieved, and the direct current blocker is mainly used for 4G antennas and can also be used for indoor distribution systems of dry leakage cables.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a three-dimensional schematic of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2 in accordance with the present invention;
FIG. 4 is a top view of the present invention with a portion of the housing hidden;
FIG. 5 is a bottom view of the present invention with a portion of the housing concealed;
fig. 6 is a three-dimensional schematic diagram of the internal structure of the present invention.
In the figure: 1. the high-voltage power supply comprises a shell, 1-1 signal input end, 1-2 signal output end, 1-3 first cavity, 1-4 second cavity, 1-5 third cavity, 2 PCB board, 3 first inductor, 4 second inductor, 5 third inductor, 6 first grounding plate, 7 second grounding plate, 8 first copper sheet, 9 second copper sheet, 10 first capacitor, 11 second capacitor, 12 fourth inductor, 13 third grounding plate, 14 fourth grounding plate, 15 gas pipe, 16 third copper sheet, 17 fourth copper sheet, 18 third capacitor, 19 fourth capacitor, 20 insulator, 21 front jack, 22 rear jack, 23 mother insulator, 24 rear insulator, 25 insulating sleeve, 26 front shell, 27 nut, 28O-ring and 29 rear shell.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1-6, a dc blocker includes a housing 1 having a signal input end 1-1 and a signal output end 1-2, a jack is disposed in the housing 1, the jack penetrates through the signal input end 1-1 and the signal output end 1-2, a PCB 2 is fixedly mounted in the housing 1, the two PCB 2 divide an inner cavity of the housing 1 into a first chamber 1-3, a second chamber 1-4 and a third chamber 1-5, the jack penetrates through the second chamber 1-4, the first chamber 1-3 and the third chamber 1-5 are respectively located at two sides of the second chamber 1-4, a first inductor 3, a second inductor 4, a third inductor 5, a first ground plate 6 and a second ground plate 7 are fixedly mounted on the PCB 2 in the first chamber 1-3, one end of the first inductor 3 is connected to the jack, the other end of the third inductor is connected with one end of a second inductor 4 through a first copper sheet 8, the other end of the second inductor 4 is connected with one end of a third inductor 5 through a second copper sheet 9, a first grounding plate 6 is connected with the first copper sheet 8 through a first capacitor 10, a second grounding plate 7 is connected with the second copper sheet 9 through a second capacitor 11, the first copper sheet 8, the second copper sheet 9, the first capacitor 10 and the second capacitor 11 are all fixedly installed on the PCB 2, the first copper sheet 8 and the second copper sheet 9 are all upper layers of the PCB 2, the first copper sheet 8 is not connected with the second copper sheet 9, a fourth inductor 12, a third grounding plate 13 and a fourth grounding plate 14 are fixedly installed on the PCB 2 in third chambers 1-5, a gas pipe 15 is fixedly installed on the fourth grounding plate 14, the other end of the third inductor 5 passes through the second chambers 1-4 and then is connected with one end of a fourth inductor 12 through a fourth copper sheet 16, and the other end of the fourth inductor 12 is connected with the gas pipe 15 through a fourth copper sheet 17, the third copper sheet 16 is connected with the third grounding plate 13 through a third capacitor 18, the fourth copper sheet 17 is connected with the third grounding plate 13 through a fourth capacitor 19, the third copper sheet 16, the fourth copper sheet 17, the third capacitor 18 and the fourth capacitor 19 are all fixedly installed on the PCB 2, the third copper sheet 16 and the fourth copper sheet 17 are all upper layers of the PCB 2, and the third copper sheet 16 is not connected with the fourth copper sheet 17.
An insulator 20 is sleeved outside an inductor straight line penetrating through the second chambers 1-4 on the third inductor 5, and the insulator 20 is connected with the two PCB boards 2.
The jacks comprise a front jack 21 and a rear jack 22, the front jack 21 is coaxially and fixedly installed at a signal input end 1-1 of the shell 1 through a female insulator 23, the rear jack 22 is coaxially and fixedly installed at a signal output end 1-2 of the shell 1 through a rear insulator 24, the front jack 21 and the rear jack 22 are connected through an insulating sleeve 25, and one end of the first inductor 3 is connected with the front jack 21.
A front shell 26 is fixedly arranged in the signal input end 1-1 of the shell 1, and the front shell 26 and the front jack 21 are coaxially arranged.
The signal input end 1-1 of the shell 1 is externally threaded with a nut 27, and the nut 27 is coaxially and fixedly provided with an O-shaped ring 28.
The shell 1 is fixedly provided with a rear shell 29, and the rear shell 29 is positioned right below the signal output end 1-2 of the shell 1 and is arranged in parallel with the signal output end 1-2 of the shell 1.
The direct current blocker of the invention uses a first inductor 3, a second inductor 4, a third inductor 5 and a fourth inductor 12 to form a fourth-order filter circuit, the first inductor 3, the second inductor 4 and the third inductor 5 are all positioned in a first cavity 1-3, then the first-order circuit, the second-order circuit and the third-order circuit are all positioned in the first cavity 1-3 to form a filter part, the fourth inductor 12 is positioned in a third cavity 1-5, then the fourth-order circuit is positioned in the third cavity, a gas pipe 15 is placed in the fourth-order circuit to form a lightning protection part, physical lightning protection can be realized, the filter part and the lightning protection part are separated, PIM (pulse-to-amplitude modulation) parameters can be avoided while lightning protection is realized, and the direct current blocker of the invention is mainly used for 4G antennas and can also be used for indoor distribution systems of leakage cables.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. A direct current blocker, comprising a housing (1) having a signal input end (1-1) and a signal output end (1-2), wherein a jack is provided in the housing (1), the jack penetrating the signal input end (1-1) and the signal output end (1-2), characterized in that: the PCB comprises a shell (1), wherein the shell (1) is internally and fixedly provided with a PCB (2), the two PCB (2) divide the inner cavity of the shell (1) into a first chamber (1-3), a second chamber (1-4) and a third chamber (1-5), jacks penetrate through the second chamber (1-4), the first chamber (1-3) and the third chamber (1-5) are respectively positioned at two sides of the second chamber (1-4), the PCB (2) in the first chamber (1-3) is fixedly provided with a first inductor (3), a second inductor (4), a third inductor (5), a first grounding plate (6) and a second grounding plate (7), one end of the first inductor (3) is connected with the jacks, the other end of the first inductor is connected with one end of the second inductor (4) through a first copper sheet (8), the other end of the second inductor (4) is connected with one end of the third inductor (5) through a second copper sheet (9), the first grounding plate (6) is connected with the first copper sheet (8) through a first capacitor (10), the second grounding plate (7) is connected with a second copper sheet (9) through a second capacitor (11), a fourth inductor (12), a third grounding plate (13) and a fourth grounding plate (14) are fixedly arranged on the PCB (2) in the third chamber (1-5), a gas tube (15) is fixedly arranged on the fourth grounding plate (14), the other end of the third inductor (5) penetrates through the second chamber (1-4) and then is connected with one end of the fourth inductor (12) through a third copper sheet (16), the other end of the fourth inductor (12) is connected with the gas pipe (15) through a fourth copper sheet (17), the third copper sheet (16) is connected with the third grounding plate (13) through a third capacitor (18), the fourth copper sheet (17) is connected with the third grounding plate (13) through a fourth capacitor (19).
2. The dc-blocker of claim 1, wherein: an insulator (20) is sleeved outside an inductor straight line penetrating through the second cavity (1-4) on the third inductor (5), and the insulator (20) is connected with the two PCB boards (2).
3. The dc-blocker of claim 1, wherein: the jack includes preceding jack (21) and back jack (22), preceding jack (21) are through female insulator (23) coaxial fixed mounting at signal input part (1-1) of shell (1), back jack (22) are through signal output part (1-2) of back insulator (24) coaxial fixed mounting at shell (1), preceding jack (21) are connected through insulating cover (25) with back jack (22), the one end and the preceding jack (21) of first inductance (3) are connected.
4. The dc-blocker of claim 1, wherein: a front shell (26) is fixedly installed in a signal input end (1-1) of the shell (1), and the front shell (26) and the front jack (21) are coaxially arranged.
5. The dc-blocker of claim 1, wherein: a nut (27) is installed on the outer thread of a signal input end (1-1) of the shell (1), and an O-shaped ring (28) is coaxially and fixedly installed on the nut (27).
6. The dc-blocker of claim 1, wherein: the shell (1) is fixedly provided with a rear shell (29), and the rear shell (29) is positioned under the signal output end (1-2) of the shell (1) and is arranged in parallel with the signal output end (1-2) of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010518476.XA CN111431160B (en) | 2020-06-09 | 2020-06-09 | DC blocker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010518476.XA CN111431160B (en) | 2020-06-09 | 2020-06-09 | DC blocker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111431160A CN111431160A (en) | 2020-07-17 |
| CN111431160B true CN111431160B (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010518476.XA Active CN111431160B (en) | 2020-06-09 | 2020-06-09 | DC blocker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111431160B (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2572642Y (en) * | 2002-09-25 | 2003-09-10 | 深圳市麦克海鹏信电子有限公司 | Microwave arrester |
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2020
- 2020-06-09 CN CN202010518476.XA patent/CN111431160B/en active Active
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| Publication number | Publication date |
|---|---|
| CN111431160A (en) | 2020-07-17 |
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