CN201674222U - Drainage device for protecting cathode of buried metal pipeline - Google Patents

Drainage device for protecting cathode of buried metal pipeline Download PDF

Info

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
Authority
CN
China
Prior art keywords
diode
metal pipeline
inductance
discharging
buried metal
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
Application number
CN2010201961569U
Other languages
Chinese (zh)
Inventor
舒江
袁鹏斌
王广群
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI HAILONG PETROLEUM PIPE MATERIAL INSTITUTE
Original Assignee
SHANGHAI HAILONG PETROLEUM PIPE MATERIAL INSTITUTE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHANGHAI HAILONG PETROLEUM PIPE MATERIAL INSTITUTE filed Critical SHANGHAI HAILONG PETROLEUM PIPE MATERIAL INSTITUTE
Priority to CN2010201961569U priority Critical patent/CN201674222U/en
Application granted granted Critical
Publication of CN201674222U publication Critical patent/CN201674222U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Prevention Of Electric Corrosion (AREA)

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

The electric drainager that is used for the buried metal pipeline cathodic protection
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.
CN2010201961569U 2010-05-18 2010-05-18 Drainage device for protecting cathode of buried metal pipeline Expired - Fee Related CN201674222U (en)

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

Family

ID=43331630

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
CN (1) CN201674222U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
CN201636674U (en) Lightning protection led street lamp
CN201674222U (en) Drainage device for protecting cathode of buried metal pipeline
CN201946767U (en) Current drainage grounding device
CN203301142U (en) Anti-lightning protection circuit of direct-current system
CN203103937U (en) Multifunctional solid decoupler
CN103296661A (en) Lightning protection circuit of direct-current system
CN201975773U (en) Over-voltage protection circuit of switching power-supply power-frequency filter capacitor
CN105048437B (en) A kind of combined type neutral ground composite control apparatus
CN106229701A (en) A kind of installation method of graphite-based flexible ground body
CN203504165U (en) Lightning prevention grounding system
CN209472381U (en) A kind of HFT three pillar type over-voltage protector
CN102931592A (en) Lightning-protection power distribution cabinet
CN202997329U (en) Lightning-protection power distribution cabinet
CN203674710U (en) Intelligent lightning-protection RS-485 wiring instrument
JP2010207057A (en) Lightning arrester
CN207775359U (en) A kind of cathodic protection earth leakage protector
CN205377231U (en) High voltage transmission lines's lightning protection system
CN202050130U (en) Lightning protection socket for household appliances
CN205846263U (en) Grounding body structure based on graphite-based flexible ground body
Aravanis et al. Lightning-induced overvoltages in the hellenic electricity distribution network
CN205811537U (en) Signal spark gap
CN204408011U (en) Protection of arrester monitoring device
CN205376792U (en) Low impedance high voltage transmission lines lightning protection system
Hernández et al. A simulation approach in electrostatic charging of rotor blades and its effects on transferred overvoltages in wind parks
CN105552818A (en) Lightning protection system for preventing electromagnetic interference of high-voltage circuit

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