CN203691258U - Rectification box having lightning protection function - Google Patents
Rectification box having lightning protection function Download PDFInfo
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- CN203691258U CN203691258U CN201320859906.XU CN201320859906U CN203691258U CN 203691258 U CN203691258 U CN 203691258U CN 201320859906 U CN201320859906 U CN 201320859906U CN 203691258 U CN203691258 U CN 203691258U
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- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
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Abstract
The utility model provides a rectification box having a lightning protection function, comprising an internal rectification circuit, a protection circuit and a lightning protection module arranged outside the rectification box; wherein the protection circuit comprises two current-limiting resistors, two pressure-sensitive resistors and a gas discharge tube, an input end of the internal rectification circuit serves as an AC incoming end of the rectification box through the first current-limiting resistor, an output end of the internal rectification circuit serves as a DC output end of the rectification box through the second current-limiting resistor, one end of the two pressure-sensitive resistors which are connected in parallel is connected to the AC incoming end of the rectification box, and the other end is connected to the DC output end of the rectification box through the gas discharge tube. According to the rectification box of the utility model, by setting the protection circuit, when the rectification box is struck by lightning, the lightning protection module arranged outside performs a portion of clamping to a lightning signal voltage, then the residual energy of the residual voltage signal is discharged gradually through the pressure-sensitive resistors and the gas discharge tube, thereby solving the problem of breakdown of a diode of the internal rectification circuit due to the lightning.
Description
Technical field
The utility model relates to a kind of rectifying box, specifically, has related to a kind of rectifying box with lightning protection function for railway disaster preventive system foreign body intrusion circuit.
Background technology
Railway disaster prevention safety monitoring system is one of important infrastructure guaranteeing railway traffic safety operation, it is mainly that the burst such as natural calamity and foreign body intrusion to jeopardizing safety of railway traffic harm is monitored, and provide disaster early-warning information, speed-limiting messages or stoppage in transit information etc. after treatment, for traffic dispatch center's operational plan adjustment, assign driving control, rescue, maintenance etc. plan for emergency handling and foundation be provided, thereby further improve railway traffic safety and efficiency of operation.
Disaster information accurately, can to monitor be the basis of railway disaster prevention safety monitoring system, and rectifying box is as the visual plant of foreign body intrusion circuit, will play very crucial corrective action in circuit.But in actual use procedure, rectifying box is arranged on outdoor spacious position conventionally, is very easy to be subject to the interference of thunder and lightning.Existing rectifying box lightning protection, only connects lightning-protection module in the outside of rectifying box, its energy of impact of can not releasing completely in the time that rectifying box is subject to lightning impulse, and make rectifying device face breakdown risk, therefore it is strengthened to protection.
In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, thus provide a kind of energy release mode simple and reliable, be easy to realize, the safe rectifying box with lightning protection function.
To achieve these goals, the technical scheme that the utility model adopts is: a kind of rectifying box with lightning protection function, it comprises inner rectification circuit, protection circuit and the lightning-protection module that is arranged at rectifying box outside, described protection circuit comprises two current-limiting resistances, two piezo-resistances and a gas discharge tube, wherein, the input of described inner rectification circuit is the interchange incoming end as rectifying box by the first current-limiting resistance, the output of described inner rectification circuit is the DC output end as rectifying box by the second current-limiting resistance, one end after described two piezo-resistance parallel connections is connected to the interchange incoming end of described rectifying box, the other end is connected to the DC output end of described rectifying box by described gas discharge tube.
The relative prior art of the utility model has substantive distinguishing features and progress, specifically, the utility model is by arranging protection circuit, in the time that rectifying box is subject to lightning impulse, first external lightning-protection module does a part of clamper by thunder and lightning signal voltage, then the energy of remaining residual pressure signal can progressively be released by piezo-resistance and gas discharge tube, and by the setting of current-limiting resistance, the diode of further having avoided inner rectification circuit because of overcurrent, overvoltage breakdown.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of rectifying box with lightning protection function, it comprises the inside rectification circuit being made up of diode D1-D4, protection circuit and the lightning-protection module that is arranged at rectifying box outside, described protection circuit comprises current-limiting resistance R1, current-limiting resistance R2, piezo-resistance Y1, piezo-resistance Y2 and gas discharge tube Z1, wherein, the input 3 of described inner rectification circuit is the interchange incoming end 1 as rectifying box by described current-limiting resistance R2, the output 4 of described inner rectification circuit is the DC output end 2 as rectifying box by described current-limiting resistance R1, what described piezo-resistance Y1 and the one end after described piezo-resistance Y2 parallel connection were connected to described rectifying box exchanges incoming end 1, the other end is connected to the DC output end 2 of described rectifying box by described gas discharge tube Z1.
In concrete use in the time that rectifying box is subject to lightning impulse, first external lightning-protection module does a part of clamper by thunder and lightning signal voltage, then the energy of remaining residual pressure signal is progressively released by described piezo-resistance Y1, Y2 and gas discharge tube Z1 respectively, can realize and discharge the suffered lightning impulse of rectifying box completely, and by the setting of current-limiting resistance R1, R2, the diode of further having avoided inner rectification circuit because of overcurrent, overvoltage breakdown.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement embodiment of the present utility model; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (1)
1. one kind has the rectifying box of lightning protection function, comprise inner rectification circuit and the lightning-protection module that is arranged at rectifying box outside, it is characterized in that: in this rectifying box, also comprise a protection circuit, described protection circuit comprises two current-limiting resistances, two piezo-resistances and a gas discharge tube, wherein, the input of described inner rectification circuit is the interchange incoming end as rectifying box by the first current-limiting resistance, the output of described inner rectification circuit is the DC output end as rectifying box by the second current-limiting resistance, one end after described two piezo-resistance parallel connections is connected to the interchange incoming end of described rectifying box, the other end is connected to the DC output end of described rectifying box by described gas discharge tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859906.XU CN203691258U (en) | 2013-12-25 | 2013-12-25 | Rectification box having lightning protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859906.XU CN203691258U (en) | 2013-12-25 | 2013-12-25 | Rectification box having lightning protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203691258U true CN203691258U (en) | 2014-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320859906.XU Expired - Lifetime CN203691258U (en) | 2013-12-25 | 2013-12-25 | Rectification box having lightning protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203691258U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058400A (en) * | 2016-06-24 | 2016-10-26 | 德清利维通讯科技股份有限公司 | Combiner with lightning protection function |
| CN106356824A (en) * | 2016-09-21 | 2017-01-25 | 天津百利机械装备研究院有限公司 | 220KV current transformer electricity-using overcurrent protection circuit |
-
2013
- 2013-12-25 CN CN201320859906.XU patent/CN203691258U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058400A (en) * | 2016-06-24 | 2016-10-26 | 德清利维通讯科技股份有限公司 | Combiner with lightning protection function |
| CN106356824A (en) * | 2016-09-21 | 2017-01-25 | 天津百利机械装备研究院有限公司 | 220KV current transformer electricity-using overcurrent protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |