CN201674222U - Drainage device for protecting cathode of buried metal pipeline - Google Patents
Drainage device for protecting cathode of buried metal pipeline Download PDFInfo
- Publication number
- CN201674222U CN201674222U CN2010201961569U CN201020196156U CN201674222U CN 201674222 U CN201674222 U CN 201674222U CN 2010201961569 U CN2010201961569 U CN 2010201961569U CN 201020196156 U CN201020196156 U CN 201020196156U CN 201674222 U CN201674222 U CN 201674222U
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- metal pipeline
- inductance
- discharging
- buried metal
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Abstract
The utility model discloses a drainage device for protecting the cathode of a buried metal pipeline; two discharging rods are arranged between the metal pipeline and the ground; a discharge gap is arranged between the two discharging rods; two inductors are serially connected, and the midpoints thereof are connected with the metal pipeline; two diodes are serially connected in the same direction and then are parallely connected with the other diode in the reverse directions; the positive pole of the other diode is connected with the other end of one inductor, and the negative pole thereof is grounded; the other end of the other inductor is connected with one end of a varistor; and the other end of the varistor is grounded. The drainage device can effectively protect the cathode of the buried metal pipeline, prevents a cathode protection system from electromagnetic interference in the environment, protects the buried metal pipeline and corresponding equipment and ensures the normal operation of the pipeline.
Description
Technical field
The utility model relates to a kind of electric drainager that is used for the buried metal pipeline cathodic protection.
Background technology
Along with the buried metal pipeline cathode protection technology uses more and more widely, the stability of cathodic protection system also receives much concern.In the actual environment, electromagnetic interference is ubiquitous, and electromagnetic interference exists too to the influence of buried metal pipeline cathodic protection system.Because electromagnetic interference causes the example of cathodic protection disabler, quickening corrosive pipeline, damage impressed current equipment of common occurrence, just become one of very important problem in the cathodic protection system so solve electromagnetic interference problem.When forceful electric power circuit such as alternating current gasification railway and ultra-high-tension power transmission line etc. parallel with underground metal pipe long-range near the time, the stray electrical current that produces of the electric current introduced of the caused strong energy electric current of thunder and lightning, arrester ground line and track traffic etc., under the effect of electromagnetic induction, all can produce higher induced voltage on pipeline, this will jeopardize the person and device security to a certain extent, influence the normal operation of pipeline.And the solution that prevents electromagnetic induction interference at present is that drain means is installed on pipeline, and drain means can effectively solve the electromagnetic induction interference problem, and the pipeline current potential is limited in reliable level.General existing drain means is made up of the diode of several forward and reverse serial connections, diode one end of several serial connections connects metallic conduit, other end ground connection, when the potential difference between pipeline and the earth surpasses the starting resistor of diode, diode is conducting, is the conducting voltage at diode two ends with the voltage limit on the pipeline; This drain means only can tolerate the smaller electromagnetic induction interference of amplitude, as the interference of stray electrical current, can not solve the interference of the strong energy electric current of forceful electric power circuit, thunder and lightning, causes the inefficacy of pipeline cathode protection, has influenced the normal operation of pipeline.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of electric drainager that is used for the buried metal pipeline cathodic protection; utilize this electric drainager to implement effective cathodic protection to buried metal pipeline; avoid cathodic protection system to be subjected to the interference of electromagnetic induction in the environment; protect buried metal pipeline and relevant device, guaranteed the normal operation of pipeline.
For solving the problems of the technologies described above; the electric drainager that the utility model is used for the buried metal pipeline cathodic protection comprises first discharging rod; second discharging rod; first inductance; second inductance; first diode; second diode; the 3rd diode and piezo-resistance; described first discharging rod connects metallic conduit; the described second discharging rod ground connection; be provided with discharging gap between described first discharging rod and second discharging rod; described first inductance is connected metallic conduit with series connection of second inductance and mid point; described second diode and the 3rd diode series aiding connection; described first diode cathode connects second diode cathode; described first diode cathode connects the 3rd diode cathode; the other end of described first inductance connects described first diode cathode; the other end of described second inductance connects described piezo-resistance one end, and the described piezo-resistance other end connects described first diode cathode and ground connection.
When heavy-current discharge, for the discharging gap that guarantees two discharging rods has arc quenching effect preferably, the discharging gap between above-mentioned first discharging rod and second discharging rod is type gap, angle.
Because being used for the electric drainager of buried metal pipeline cathodic protection, the utility model adopted technique scheme; be to be provided with two discharging rods between metallic conduit and ground; be provided with discharging gap between two discharging rods; two inductance are connected and mid point connection metallic conduit; in parallel behind two diode series aiding connections with another diode reverse; another diode cathode connects an inductance other end, minus earth, and the other end of another inductance connects piezo-resistance one end, the other end ground connection of piezo-resistance.This electric drainager can be implemented effective cathodic protection to buried metal pipeline, avoids cathodic protection system to be subjected to the interference of electromagnetic induction in the environment, has protected buried metal pipeline and relevant device, has guaranteed the normal operation of pipeline.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is used for the circuit diagram of buried metal pipeline cathodic protection electric drainager for the utility model.
Embodiment
As shown in Figure 1; the electric drainager that the utility model is used for the buried metal pipeline cathodic protection comprises first discharging rod 2; second discharging rod 3; first inductance L 1; second inductance L 2; the first diode D1; the second diode D2; the 3rd diode D3 and piezo-resistance R; described first discharging rod 2 connects metallic conduit 1; described second discharging rod, 3 ground connection; be provided with discharging gap 4 between described first discharging rod 2 and second discharging rod 3; described first inductance L 1 is connected metallic conduit 1 with 2 series connection of second inductance L and mid point; described second diode D2 and the 3rd diode D3 series aiding connection; the anodal second diode D2 negative pole that connects of the described first diode D1; the described first diode D1 negative pole connects the 3rd diode D3 positive pole; the other end of described first inductance L 1 connects the described first diode D1 positive pole; the other end of described second inductance L 2 connects described piezo-resistance R one end, and the described piezo-resistance R other end connects described first diode D1 negative pole and the ground connection.
When heavy-current discharge, for the discharging gap that guarantees two discharging rods has arc quenching effect preferably, discharging gap 4 between above-mentioned first discharging rod 2 and second discharging rod 3 is type gaps, angle 41, this angular clearance 41 is similar to the goat's horn shape, gap, goat's horn top is provided with blow-out plate 42, and this structure helps electric arc and disperses, and reduces the energy of unit are electric arc, breath arc plate 42 stops electric arc, improves arc quenching effect.
In this electric drainager, first inductance and three diodes have constituted the current drainage loop of little electric current when long, first diode current flow during interference voltage positive half wave; Second diode and the 3rd diode current flow when bearing half-wave are so the pressure drop of negative arm joint is-1.4V and close with the cathodic protection potential of metallic conduit not only to have stoped scattering and disappearing of protective current, but also utilized the part of interference voltage;
Two discharging rods are the metal bar that is exposed to airborne two certain intervals of being separated by; wherein a metal bar is connected with the metallic conduit of required protection; another root metal bar ground connection; when transient high voltage such as thunderbolt attack; the gap of two discharging rods is breakdown; the high-tension electric charge of a part is introduced the earth, avoided the voltage on the protected metallic conduit to raise.Gap between two discharging rods can be adjusted on demand, and is simple in structure, and discharging gap adopts type gap, angle, has arc quenching effect preferably.
Simultaneously, second inductance and piezo-resistance constitute the surge protection loop, and piezo-resistance is very responsive to voltage, and its operation principle is equivalent to the connection in series-parallel of a plurality of semiconductor P-N knots.The characteristics of piezo-resistance are that nonlinear characteristic is good, and discharge capacity is big, and the normality leakage current is little, and residual voltage is low, and is fast to the instantaneous overvoltage response time, no afterflow; Piezo-resistance has the variable resistor that changes along with change in voltage, and when voltage is lower than certain particular value, the electron motion in the semiconductor will produce high resistance, otherwise, when voltage surpassed this particular value, electron motion can change, and semiconductor resistor can significantly reduce; When overtension, piezo-resistance can be conducted a large amount of electric currents to ground wire, eliminates unnecessary voltage, and the normal back of voltage piezo-resistance increases rapidly once more, so piezo-resistance only shifts surge current, provides more efficiently protection to metallic conduit.
This electric drainager has resistive coupling, the capacitive couplings of electromagnetic interference such as protection thunder and lightning etc., the current drainage function of inductive couplings; The encapsulation of employing hermetically-sealed construction, electric arc is difficult for leaking, and is applicable to the place of all kinds of explosion-proof demands; Provide effective protection to buried metal pipeline and relevant device, guaranteed the normal operation of pipeline and equipment.
Claims (2)
1. electric drainager that is used for the buried metal pipeline cathodic protection; it is characterized in that: this electric drainager comprises first discharging rod; second discharging rod; first inductance; second inductance; first diode; second diode; the 3rd diode and piezo-resistance; described first discharging rod connects metallic conduit; the described second discharging rod ground connection; be provided with discharging gap between described first discharging rod and second discharging rod; described first inductance is connected metallic conduit with series connection of second inductance and mid point; described second diode and the 3rd diode series aiding connection; described first diode cathode connects second diode cathode; described first diode cathode connects the 3rd diode cathode; the other end of described first inductance connects described first diode cathode; the other end of described second inductance connects described piezo-resistance one end, and the described piezo-resistance other end connects described first diode cathode and ground connection.
2. the electric drainager that is used for the buried metal pipeline cathodic protection according to claim 1 is characterized in that: the discharging gap between described first discharging rod and second discharging rod is type gap, angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201961569U CN201674222U (en) | 2010-05-18 | 2010-05-18 | Drainage device for protecting cathode of buried metal pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201961569U CN201674222U (en) | 2010-05-18 | 2010-05-18 | Drainage device for protecting cathode of buried metal pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201674222U true CN201674222U (en) | 2010-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201961569U Expired - Fee Related CN201674222U (en) | 2010-05-18 | 2010-05-18 | Drainage device for protecting cathode of buried metal pipeline |
Country Status (1)
| Country | Link |
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| CN (1) | CN201674222U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774721A (en) * | 2014-02-21 | 2014-05-07 | 周伟裕 | Thunder prevention and filtration water tank |
| CN105162100A (en) * | 2015-08-06 | 2015-12-16 | 北京市燃气集团有限责任公司 | Novel alternating-current electric drainage |
| CN104357851B (en) * | 2014-10-30 | 2018-02-23 | 华为技术有限公司 | A kind of method, grounding wire device and earthed system for suppressing galvanic corrosion |
| CN109066626A (en) * | 2018-08-28 | 2018-12-21 | 成都中航信虹科技股份有限公司 | The drainage method and stream discharging system of pipeline |
| CN111452677A (en) * | 2019-01-22 | 2020-07-28 | 镇江大全赛雪龙牵引电气有限公司 | Leakage current discharging device for rail transit power supply system frame |
-
2010
- 2010-05-18 CN CN2010201961569U patent/CN201674222U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774721A (en) * | 2014-02-21 | 2014-05-07 | 周伟裕 | Thunder prevention and filtration water tank |
| CN104357851B (en) * | 2014-10-30 | 2018-02-23 | 华为技术有限公司 | A kind of method, grounding wire device and earthed system for suppressing galvanic corrosion |
| CN105162100A (en) * | 2015-08-06 | 2015-12-16 | 北京市燃气集团有限责任公司 | Novel alternating-current electric drainage |
| CN109066626A (en) * | 2018-08-28 | 2018-12-21 | 成都中航信虹科技股份有限公司 | The drainage method and stream discharging system of pipeline |
| CN109066626B (en) * | 2018-08-28 | 2019-04-30 | 成都中航信虹科技股份有限公司 | The drainage method and stream discharging system of pipeline |
| CN111452677A (en) * | 2019-01-22 | 2020-07-28 | 镇江大全赛雪龙牵引电气有限公司 | Leakage current discharging device for rail transit power supply system frame |
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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: 20101215 Termination date: 20180518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |