CN202524077U - Combination type video lightning protection surge protective device - Google Patents
Combination type video lightning protection surge protective device Download PDFInfo
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- CN202524077U CN202524077U CN201220093090XU CN201220093090U CN202524077U CN 202524077 U CN202524077 U CN 202524077U CN 201220093090X U CN201220093090X U CN 201220093090XU CN 201220093090 U CN201220093090 U CN 201220093090U CN 202524077 U CN202524077 U CN 202524077U
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- protection module
- lightning protection
- control signal
- cradle head
- head control
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Abstract
The utility model relates to a combination type video lightning protection surge protective device. The combination type video lightning protection surge protective device is provided with an outer casing, wherein the outer casing is provided with a power supply lightning protection module, a cradle head control signal lightning protection module and a video signal lightning protection module, the power supply lightning protection module is equipped on a first circuit board, the cradle head control signal lightning protection module and the video signal lightning protection module are equipped on a second circuit board which is sleeved with an insulation shielded sleeve, and an equipotential connection module is arranged between ground line of the first circuit board and ground line of the second circuit board. According to the combination type video lightning protection surge protective device, the power supply lightning protection module, and the cradle head control signal lightning protection module and the video signal lightning protection module are separately equipped on different circuit boards, and the two signal lightning protection modules are covered by utilizing the insulation shielded sleeve, so excellent shielding effects are achieved, moreover, the equipotential connection module can further effectively prevent interference and damage to signal transmission lines during ground potential counterattack, and thereby influence on the signal transmission lines caused by electromagnetic interference of power supply lines is effectively eliminated.
Description
Technical field
The utility model relates to a kind of anti-thunder surge protector, especially a kind of combined video anti-thunder surge protector, and it is applicable to the lightning protection of the rig camera that has the cradle head control port.
Background technology
In prior art, the video monitoring video camera that has cradle head control need insert cradle head control signal, vision signal and power supply, on these three interfaces of video camera, all need be connected in series the anti-thunder surge protector.The anti-thunder surge protector that has the video monitoring video camera now adopts isolating construction mostly, and promptly an interface is connected in series a surge protector, and this just makes the structure of surge protector disperse, and moves and safeguard inadequately to make things convenient for.But; If three surge protectors are fitted together; Exist interference problem again, this is that the electromagnetic interference that it produces very easily is transferred in the signal line through lead or other conductor owing to exist serious harmonic distortion in the power circuit; Have a strong impact on transmission of video signals, can cause distortion, distortion or the anomaly such as image blurring of image.In addition, above-mentioned anti-thunder surge protector adopts the single-stage protection mostly, makes the residual voltage of protector high, and the protection level is low, is difficult to reach the lightning protection purpose of expection.
The utility model content
The purpose of the utility model is to make things convenient for problem inadequately in order to overcome the structure dispersion, move and to safeguard; A kind of combined video anti-thunder surge protector is provided; It can solve interference problem preferably; Guarantee the transmission of video signals quality, also reduced the residual voltage of protector simultaneously, improved the protection level.
For realizing above-mentioned purpose, the technical scheme of the utility model is following:
It is provided with a shell; Its improvements are: in described shell, be provided with a power lightning protection module, a cradle head control signal lighting protection module and a vision signal lightning-protection module; Described power lightning protection module is installed on the first circuit board; Described cradle head control signal lighting protection module and vision signal lightning-protection module are installed on the second circuit board; And on this second circuit board, be with the insulation shielding cover, and between the ground wire of described first circuit board and second circuit board, being provided with an equipotential link block, this equipotential link block is made up of a discharge tube and a piezo-resistance parallel connection.
The further improved technical scheme of the utility model is following:
Described insulation shielding cover by the heat-shrink tube that is located at internal layer, in the middle of being located at shielding cloth and be located at outer field polyester film and constitute.
Described power lightning protection module is made up of the decoupling coil that is connected on a level power supply protection circuit and the secondary power supply protection circuit between camera power supply live wire L, zero line N and the ground wire PE incoming end and be connected between the said firsts and seconds power supply protection circuit; Said cradle head control signal lighting protection module is made up of one-level cradle head control signal guard circuit that is connected on camera pan-tilt control signal incoming end and secondary cradle head control signal guard circuit and the decoupling coil that is connected between the said firsts and seconds cradle head control signal lighting protection circuit, and described vision signal lightning-protection module is made up of one-level vision signal protection circuit that is connected on the camera video signal incoming end and secondary vision signal protection circuit and the decoupling coil that is connected between the said firsts and seconds vision signal protection circuit.
Can find out through technique scheme; The utility model divides plate to install power lightning protection module and cradle head control signal lighting protection module and vision signal lightning-protection module; And adopt the insulation shielding cover that two signal lighting protection module cages are got up; Play the well-shielded effect, thereby effectively eliminated of the influence of power circuit electromagnetic interference signal line.Simultaneously; Consider that again signal ground and power supply ground directly are connected when inserting the earth; Signal line very easily receives the interference from earthy counterattack or power supply power current; Therefore, between power ground and signal ground, inserted an equipotential link block again, this module can prevent earth potential counterattack or power supply power current interference and the destruction to signal transmission line effectively.The further improved technical scheme of the utility model is that three lightning-protection modules all adopt the two poles of the earth protection, and between the two-stage protection, is provided with the decoupling coil, through regulating the decoupling coil, can effectively reduce the residual voltage of protector, improves the protection level.
Description of drawings
Fig. 1 is the functional-block diagram of the utility model.
Fig. 2 is the circuit diagram of power lightning protection module.
Fig. 3 is the circuit diagram of cradle head control signal lighting protection module.
Fig. 4 is the circuit diagram of vision signal lightning-protection module.
Fig. 5 is the circuit diagram of equipotential link block.
Fig. 6 is that the contour structures of the utility model partly cuts open figure (front view).
Fig. 7 is that the left side of Fig. 6 is looked and partly cutd open structure chart.
Embodiment
Referring to Fig. 1,6; This protector is provided with a shell (1); In described shell, be provided with a power lightning protection module (2), a cradle head control signal lighting protection module (3) and a vision signal lightning-protection module (4); Described power lightning protection module is installed on the first circuit board (5); Described cradle head control signal lighting protection module and vision signal lightning-protection module are installed on the second circuit board (6), and on this second circuit board, are provided with insulation shielding cover (7), between the ground wire of described first circuit board and second circuit board, are provided with an equipotential link block (8).Among Fig. 6, piece number (9) is the access interface (S1 of cradle head control signal
Insert, S2
Insert), (9 ') picks out port (S1 for the cradle head control signal
Pick out, S2
Pick out), piece number (10) is the access interface (H1 of vision signal
InsertOr H2
Insert, GND), (10 ') picks out port (H1 for vision signal
Pick outOr H2
Pick out, GND), piece number (11) is power access end mouth (L
Insert, N
Insert, PE
Insert), (11 ') picks out port (L for power supply
Pick out, N
Pick out, PE
Pick out).
Referring to Fig. 7, described insulation shielding overlaps by the heat-shrink tube that is located at internal layer (7-3), is located at middle shielding cloth (7-2) and is located at outer field polyester film (7-1) and form, and wherein heat-shrink tube and polyester film play insulating effect, and shielding cloth plays electromagnetic shielding action.
Referring to Fig. 1,2, described power lightning protection module is made up of the decoupling coil (2-3) that is connected on a level power supply protection circuit (2-1) and the secondary power supply protection circuit (2-2) between video camera (12) live wire L, zero line N and the ground wire PE incoming end and be connected between this two level power supplies protection circuit.As shown in Figure 2; A described level power supply protection circuit (2-1) and secondary power supply protection circuit (2-2) have adopted existing single-stage protection circuit respectively; It is not limited to the circuit structure shown in the figure, can in existing single-stage lightning protection circuit, carry out multiple choices, still; No matter select the sort of circuit, all should satisfy the residual voltage index and the protection level of customer requirements.As shown in Figure 1, during use, with power supply terminal (L, N, PE) from this protector power access end mouth (L
Insert, N
Insert, FE
Insert) inserting this protector, the power supply by this protector picks out port (L again
Pick out, N
Pick out, FE
Pick out) be connected to the power port of video monitoring video camera (12).As shown in Figure 2 again; With a level power supply protection circuit (2-1) is example; The lightning protected principle of this module is: when producing lightning overvoltage between live wire L and zero line N and the ground wire PE, (Rv1～Rv4) presents low resistance, the conducting of discharge tube (G1) discharge simultaneously to piezo-resistance; Then present short circuit and earial drainage between live wire L and the ground wire PE and between zero line N and the ground wire PE, thereby play the overvoltage protection effect.In order to reduce the residual voltage that the two-stage protection circuit connects, between above-mentioned two level power supply protection circuits, be provided with decoupling coil (2-3), through regulating the decoupling coil, but the energy relationship between the reasonable distribution two-stage, thus the residual voltage of this module effectively reduced.In secondary power supply protection circuit (2-2), be connected into the deterioration indicating circuit of a lightning protection component by resistance (R2), luminous indicating lamp (D1), diode (D2).Piece number F1～F4 is a fuse among Fig. 2, and piece number Rv6, Rv7 are piezo-resistance, and piece number R1 is a conventional, electric-resistance.
Referring to Fig. 1,3, said cradle head control signal lighting protection module is made up of the one-level cradle head control signal guard circuit (3-1) and the secondary cradle head control signal guard circuit (3-2) that are connected on video camera (12) cradle head control signal incoming end and the decoupling coil (3-3) that is connected between the said firsts and seconds cradle head control signal lighting protection circuit.As shown in Figure 3, identical with Fig. 2, described one-level and two utmost point cradle head control signal guard circuits have also adopted existing single-stage protection circuit respectively, and can reduce the residual voltage of two-stage protection circuit through the decoupling coil (3-3) of regulating two inter-stages.During use, as shown in Figure 1, the cradle head control signal is inserted the control signal access interface (S1 of terminal (S1, S2) from this protector
InsertAnd S2
Insert) inserting this protector, the cradle head control signal by this protector picks out terminal (S1 then
Pick outAnd S2
Pick out) be connected to the cradle head control signal access port of video camera (12).As shown in Figure 3; When lightning overvoltage occurring between control signal S1 and the S2 end; Discharge tube (G2) conducting of in very short time, discharging, simultaneously, the discharge tube (conducting of also discharging of G3～G5); Make the overvoltage between S1, S2 pass through the diode full-wave rectification, play two-stage atmospheric over voltage protection effect signal ground GND earial drainage.
Referring to Fig. 1,4, described vision signal lightning-protection module is made up of the one-level vision signal protection circuit (4-1) that is connected on video camera (12) vision signal incoming end and secondary vision signal protection circuit (4-2) and the decoupling coil (4-3) that is connected between the said firsts and seconds vision signal protection circuit.Identical with Fig. 3, wherein one-level and two utmost point video protection circuits have also adopted existing single-stage protection circuit respectively, and reduce the residual voltage of this two stages of circuit through the decoupling coil (4-3) of regulating two inter-stages.Protection philosophy and Fig. 3 are basic identical.
Referring to Fig. 5, described equipotential link block is made up of a discharge tube (G8) and a piezo-resistance (Rv8) parallel connection.Under the normal conditions (normal voltage), discharge tube breaks off, and piezo-resistance presents high resistant, then is equivalent between power ground PE and the signal ground GND break off, and the electromagnetic interference of power circuit and outside can not the entering signal transmission line, has guaranteed the normal transmission of signal.When lightning overvoltage occurring, discharge tube (G8) discharge conducting, piezo-resistance presents low-resistance simultaneously, then two ground wire short circuits and to the earth earial drainage, play the lightning protection effect.It has made full use of, and the discharge tube discharge capacity is big, the fast characteristics of piezo-resistance reaction speed, when having prevented the earth potential counterattack effectively, to the interference and the destruction of signal transmission line.
Claims (3)
1. combined video anti-thunder surge protector; It is provided with a shell (1); It is characterized in that: in described shell, be provided with a power lightning protection module (2), a cradle head control signal lighting protection module (3) and a vision signal lightning-protection module (4); Described power lightning protection module is installed on the first circuit board (5); Described cradle head control signal lighting protection module and vision signal lightning-protection module are installed on the second circuit board (6); And on this second circuit board, be with insulation shielding cover (7), and between the ground wire of described first circuit board and second circuit board, being provided with an equipotential link block (8), this equipotential link block is made up of a discharge tube (G8) and a piezo-resistance (Rv8) parallel connection.
2. combined video anti-thunder surge protector according to claim 1 is characterized in that: described insulation shielding overlaps by the heat-shrink tube that is located at internal layer (7-3), is located at middle shielding cloth (7-2) and is located at outer field polyester film (7-1) formation.
3. combined video anti-thunder surge protector according to claim 1 and 2; It is characterized in that: described power lightning protection module is made up of the decoupling coil I (2-3) that is connected on a level power supply protection circuit (2-1) and the secondary power supply protection circuit (2-2) between camera power supply live wire L, zero line N and the ground wire PE incoming end and be connected between the said firsts and seconds power supply protection circuit; Said cradle head control signal lighting protection module is made up of the one-level cradle head control signal guard circuit (3-1) that is connected on camera pan-tilt control signal incoming end and secondary cradle head control signal guard circuit (3-2) and the decoupling coil II (3-3) that is connected between the said firsts and seconds cradle head control signal lighting protection circuit, and described vision signal lightning-protection module is made up of the one-level vision signal protection circuit (4-1) that is connected on the camera video signal incoming end and secondary vision signal protection circuit (4-2) and the decoupling coil III (4-3) that is connected between the said firsts and seconds vision signal protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220093090XU CN202524077U (en) | 2012-03-14 | 2012-03-14 | Combination type video lightning protection surge protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220093090XU CN202524077U (en) | 2012-03-14 | 2012-03-14 | Combination type video lightning protection surge protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202524077U true CN202524077U (en) | 2012-11-07 |
Family
ID=47107006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220093090XU Expired - Fee Related CN202524077U (en) | 2012-03-14 | 2012-03-14 | Combination type video lightning protection surge protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202524077U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094894A (en) * | 2013-01-25 | 2013-05-08 | 南通天地通网络工程有限公司 | Arrester of high-frequency transmission line |
| CN103986135A (en) * | 2014-05-09 | 2014-08-13 | 广西南宁百兰斯科技开发有限公司 | Lightning protection device for video monitoring |
| CN104466937A (en) * | 2014-12-03 | 2015-03-25 | 国家电网公司 | Surge interference resisting protector based on electricity meter reading system |
-
2012
- 2012-03-14 CN CN201220093090XU patent/CN202524077U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094894A (en) * | 2013-01-25 | 2013-05-08 | 南通天地通网络工程有限公司 | Arrester of high-frequency transmission line |
| CN103094894B (en) * | 2013-01-25 | 2016-04-27 | 南通天地通网络工程有限公司 | Arrester of high-frequency transmission line |
| CN103986135A (en) * | 2014-05-09 | 2014-08-13 | 广西南宁百兰斯科技开发有限公司 | Lightning protection device for video monitoring |
| CN104466937A (en) * | 2014-12-03 | 2015-03-25 | 国家电网公司 | Surge interference resisting protector based on electricity meter reading system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20190314 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |