CN201584775U - Cable TV signal lightning arrester - Google Patents
Cable TV signal lightning arrester Download PDFInfo
- Publication number
- CN201584775U CN201584775U CN2009202946455U CN200920294645U CN201584775U CN 201584775 U CN201584775 U CN 201584775U CN 2009202946455 U CN2009202946455 U CN 2009202946455U CN 200920294645 U CN200920294645 U CN 200920294645U CN 201584775 U CN201584775 U CN 201584775U
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- diode
- signal source
- gas discharge
- circuit
- discharge tube
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Abstract
The utility model discloses a cable TV signal lightning arrester which comprises a signal source wire, shielding layer wires and an earth wire, wherein the lightning arrester is provided with a gas discharge tube circuit and a diode circuit from the input end to the output end in turn, the gas discharge tube circuit comprises a gas discharge tube which is connected between the signal source wire and the shielding layer wires, the gas discharge tube is connected into the earth wire, the diode circuit comprises five diodes which are arranged between the signal source wire and the shielding layer wires, wherein the first and the second diodes are connected between the signal source wire and the shielding layer wires in series in a mode of anodes to anodes, the third and the fourth diodes are connected between the signal source wire and the shielding layer wires in series in a mode of cathodes to the cathodes, the first and the third diodes are provided with bypass circuits among diode ends, a two-way diode is connected in series on the bypass circuits, and anodes ends of the first and the third diodes are respectively connected into the earth wire. The cable TV signal lightning arrester realizes two-stage protection of surge voltage through the gas discharge tube circuit and the diode circuits, and has higher reliability and simple circuit structure.
Description
Technical field
The utility model relates to a kind of cable TV lightning protection device.
Background technology
Surge voltage can produce harm greatly to electrical equipment, and is especially bigger for household electrical appliance harm, therefore surge protective device must be set.As application number is that 95237061.1 Chinese utility model patent discloses a kind of cable TV anti-lightening protector; comprise high frequency transformer; capacitance; piezo-resistance; the joint of stube cable; the socket that connects amplifier; between preceding end cable and the amplifier; the thunder and lightning that can isolate leading portion is arranged; but the TV signal that the leading portion cable can be come is the signal isolator of input amplifier successfully; there is one can isolate the thunder and lightning that the back segment cable comes between back segment cable and the amplifier; but the TV signal of amplifier output successfully can be dredged the signal isolator of back segment cable; thunder and lightning on the energy insulating power supply line is arranged between power line and the amplifier, but the alternating current that power line comes can be entered smoothly the power isolator of amplifier.This cable TV lightning protection device complex structure, reliability are also good inadequately, cause cost to improve, and use also inconvenient.
The utility model content
Technical problem to be solved in the utility model just provides a kind of simple in structure, and good reliability is with low cost, cable TV lightning protection device easy to use.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: cable television signal lightning arrester, draw together the signal source line, shielding layer line and ground wire, it is characterized in that: described lightning protection device is disposed with gas discharge tube circuit and diode circuit by input to output, described gas discharge tube circuit comprises the signal source line and shields the gas discharge tube that is connected between layer line, gas discharge tube inserts ground wire, described diode circuit comprises five diodes that are provided with between signal source line and shielding layer line, wherein first and second diode cathode are serially connected between signal source line and shielding layer line positive pole, third and fourth diode cathode anticathode is serially connected between described signal source line and shielding layer line line, and be provided with bypass line between first and the 3rd diode cathode end, bidirectional diode of serial connection on the described bypass line, and first and the 3rd diode cathode end insert ground wire respectively.
As preferably, described from first diode cathode end to the circuit of ground wire on forward a diode is set, described from the 3rd diode cathode end to the circuit of ground wire on negative sense a diode is set.
As preferably, described signal source line and shielding layer line also are in series with resistance between gas discharge tube circuit and diode circuit.
The utility model is realized the two-stage of surge voltage is protected by gas discharge tube circuit and diode circuit owing to adopted technique scheme, and reliability is higher, and circuit structure is also very simple.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further described:
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, embodiment for the utility model cable TV lightning protection device, draw together the signal source line, shielding layer line and ground wire, described lightning protection device is disposed with gas discharge tube circuit and diode circuit by input to output, described gas discharge tube circuit comprises the signal source line and shields the gas discharge tube that is connected between layer line, gas discharge tube inserts ground wire, described diode circuit comprises five diodes that are provided with between signal source line and shielding layer line, wherein first and second diode cathode are serially connected between signal source line and shielding layer line positive pole, third and fourth diode cathode anticathode is serially connected between described signal source line and shielding layer line line, and be provided with bypass line between first and the 3rd diode cathode end, bidirectional diode of serial connection on the described bypass line, and first and the 3rd diode cathode end insert ground wire respectively.Described from first diode cathode end to the circuit of ground wire on forward a diode is set, described from the 3rd diode cathode end to the circuit of ground wire on negative sense a diode is set.Described signal source line and shielding layer line also are in series with resistance between gas discharge tube circuit and diode circuit.Among Fig. 1, D1 is first diode, D2 is second diode, D3 is the 3rd diode, and D4 is the 4th diode, and D5 is that the 5th diode is bidirectional diode, D6 be from first diode cathode end to the circuit of ground wire on the diode that is provided with of forward, D7 be from the 3rd diode cathode end to the circuit of ground wire on the diode that is provided with of negative sense, G is the gas discharge tube between signal source line and shielding layer line, R1, R2 are respectively the resistance of connecting on signal source line and the shielding layer line.
In the network system of television set wire signal; when the front end string of television set wire signal has lightning protection anti-surge protector of the present utility model; under normal circumstances; protector and the earth are in high-impedance state; when system the surge overvoltage occurs and reaches the discharge voltage of protector because of thunderbolt or other reasons; protector can be immediately in time nanosecond rapidly and the earth conducting; powerful surge current is introduced the earth; thereby protected television set; protector returns to the high-impedance state with the earth again after this surge voltage disappears, and does not influence the normal operation of system for TV set.
Claims (3)
1. cable television signal lightning arrester, draw together the signal source line, shielding layer line and ground wire, it is characterized in that: described lightning protection device is disposed with gas discharge tube circuit and diode circuit by input to output, described gas discharge tube circuit comprises the signal source line and shields the gas discharge tube that is connected between layer line, gas discharge tube inserts ground wire, described diode circuit comprises five diodes that are provided with between signal source line and shielding layer line, wherein first and second diode cathode are serially connected between signal source line and shielding layer line positive pole, third and fourth diode cathode anticathode is serially connected between described signal source line and shielding layer line line, and be provided with bypass line between first and the 3rd diode cathode end, bidirectional diode of serial connection on the described bypass line, and first and the 3rd diode cathode end insert ground wire respectively.
2. cable television signal lightning arrester according to claim 1, it is characterized in that: described from first diode cathode end to the circuit of ground wire on forward a diode is set, described from the 3rd diode cathode end to the circuit of ground wire on negative sense a diode is set.
3. cable television signal lightning arrester according to claim 2 is characterized in that: described signal source line and shielding layer line also are in series with resistance between gas discharge tube circuit and diode circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202946455U CN201584775U (en) | 2009-12-21 | 2009-12-21 | Cable TV signal lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202946455U CN201584775U (en) | 2009-12-21 | 2009-12-21 | Cable TV signal lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201584775U true CN201584775U (en) | 2010-09-15 |
Family
ID=42726788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202946455U Expired - Fee Related CN201584775U (en) | 2009-12-21 | 2009-12-21 | Cable TV signal lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201584775U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764399A (en) * | 2009-12-21 | 2010-06-30 | 浙江恒丰光电技术有限公司 | Cable television signal lightning arrester |
-
2009
- 2009-12-21 CN CN2009202946455U patent/CN201584775U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764399A (en) * | 2009-12-21 | 2010-06-30 | 浙江恒丰光电技术有限公司 | Cable television signal lightning arrester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20121221 |