CN201584778U - Video surge protection device - Google Patents
Video surge protection device Download PDFInfo
- Publication number
- CN201584778U CN201584778U CN2009202946402U CN200920294640U CN201584778U CN 201584778 U CN201584778 U CN 201584778U CN 2009202946402 U CN2009202946402 U CN 2009202946402U CN 200920294640 U CN200920294640 U CN 200920294640U CN 201584778 U CN201584778 U CN 201584778U
- Authority
- CN
- China
- Prior art keywords
- signal source
- gas discharge
- shielding layer
- discharge tube
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a video surge protection device, which comprises a signal source line and a shielding layer line. The protection device is provided with a gas discharge tube circuit and a diode circuit in sequence from the input end to the output end, wherein the gas discharge tube circuit comprises a gas discharge tube that is connected between the signal source line and the shielding layer line and is grounded; the diode circuit comprises four diodes that are arranged between the signal source line and the shielding layer line; the first and the second diodes are sequentially connected in series from the signal source line to the shielding layer line along the forward direction; and the third and the fourth diodes are connected between the signal source line and the shielding layer line in a cathode-to-cathode way. With the adoption of the technical scheme, the protection device has simple structure, low cost and convenient use.
Description
Technical field
The utility model relates to a kind of video surge protector.
Background technology
Surge voltage can produce harm greatly to electrical equipment, and is especially bigger to the electrical appliance harm with semiconductor device, microprocessor, digital circuit, therefore surge protective device must be set.The surge protective device complex structure that existing video monitoring system is used, cost is higher, uses also inconvenient.
The utility model content
Technical problem to be solved in the utility model just provides a kind of simple in structure, and is with low cost, video surge protector easy to use.
For solving the problems of the technologies described above; the utility model adopts following technical scheme: video surge protector; comprise the signal source line; the shielding layer line; it is characterized in that: described protector 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 ground connection; described diode circuit comprises four diodes that are provided with between signal source line and shielding layer line; wherein first is connected in series from signal source alignment shielding layer line forward in turn with second diode, and third and fourth diode cathode anticathode is serially connected between described signal source line and shielding layer line line.
As preferably, described gas discharge tube is provided with two, and two gas discharge tubes are arranged in parallel between signal source line and shielding layer line and all insert earth connection.
As preferably, described signal source line also is in series with resistance between gas discharge tube circuit and diode circuit.
The utility model is owing to having adopted technique scheme, and is simple in structure, with low cost, easy to use.
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 video surge protector; comprise the signal source line; the shielding layer line; described protector 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 ground connection; described diode circuit comprises four diodes that are provided with between signal source line and shielding layer line; wherein first is connected in series from signal source alignment shielding layer line forward in turn with second diode, and third and fourth diode cathode anticathode is serially connected between described signal source line and shielding layer line line.Described gas discharge tube is provided with two, and two gas discharge tubes are arranged in parallel between signal source line and shielding layer line.Described signal source line also is in series with resistance between gas discharge tube circuit and diode circuit.The circuit board of described surge protecting circuit places on the interior support of a metal shell, and corresponding input and output interface are set on the shell.Among Fig. 1, D1 is first diode, D2 is second diode, D3 is the 3rd diode, D4 is the 4th diode, G1 is first gas discharge tube between signal source line and shielding layer line, and G2 is second gas discharge tube between signal source line and shielding layer line, and R is the resistance of connecting on the signal source line.
This multi-functional surge protection device is applicable to the lightning protection anti-surge protection of video monitoring system; in supervisory control system; when the front end string of camera has supervisory control system camera lightning protection anti-surge protector; 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 camera; protector returns to the high-impedance state with the earth again after this surge voltage disappears, and does not influence the normal operation of supervisory control system camera.
Claims (3)
1. video surge protector; comprise the signal source line; the shielding layer line; it is characterized in that: described protector 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 ground connection; described diode circuit comprises four diodes that are provided with between signal source line and shielding layer line; wherein first is connected in series from signal source alignment shielding layer line forward in turn with second diode, and third and fourth diode cathode anticathode is serially connected between described signal source line and shielding layer line.
2. video surge protector according to claim 1 is characterized in that: described gas discharge tube is provided with two, and two gas discharge tubes are arranged in parallel between signal source line and shielding layer line.
3. video surge protector according to claim 2 is characterized in that: described signal source line also is in series with resistance between gas discharge tube circuit and diode circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202946402U CN201584778U (en) | 2009-12-21 | 2009-12-21 | Video surge protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202946402U CN201584778U (en) | 2009-12-21 | 2009-12-21 | Video surge protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201584778U true CN201584778U (en) | 2010-09-15 |
Family
ID=42726791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202946402U Expired - Fee Related CN201584778U (en) | 2009-12-21 | 2009-12-21 | Video surge protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201584778U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368163A (en) * | 2012-03-30 | 2013-10-23 | 深圳市威尔利实业有限公司 | A surge protection circuit and a surge protector |
-
2009
- 2009-12-21 CN CN2009202946402U patent/CN201584778U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368163A (en) * | 2012-03-30 | 2013-10-23 | 深圳市威尔利实业有限公司 | A surge protection circuit and a surge protector |
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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 |