CN207775359U - A kind of cathodic protection earth leakage protector - Google Patents

A kind of cathodic protection earth leakage protector Download PDF

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Publication number
CN207775359U
CN207775359U CN201820141349.0U CN201820141349U CN207775359U CN 207775359 U CN207775359 U CN 207775359U CN 201820141349 U CN201820141349 U CN 201820141349U CN 207775359 U CN207775359 U CN 207775359U
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CN
China
Prior art keywords
cathodic protection
lightning
diode
capacitance
earth leakage
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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CN201820141349.0U
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Chinese (zh)
Inventor
付山林
程彤
杨斌斌
刘贤德
景增
李青青
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.)
BEIJING ZHONGFU CORROSION & PROTECTION Co Ltd
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BEIJING ZHONGFU CORROSION & PROTECTION Co Ltd
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Priority to CN201820141349.0U priority Critical patent/CN207775359U/en
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Publication of CN207775359U publication Critical patent/CN207775359U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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  • Prevention Of Electric Corrosion (AREA)

Abstract

The utility model is related to cathodic protection system technical fields, provide a kind of cathodic protection earth leakage protector, including diode array, capacitance, decoupling inductance and lightning-protected product;Series connection decoupling inductance is connected in parallel with lightning-protected product again after diode array and capacitance parallel connection, and diode array is made of the concatenated heavy-duty diode reverse parallel connection of two-way.The beneficial effects of the utility model:Cathodic protection system ground connection is isolated, cathodic protection current is made not to be lost in by being grounded, improves cathodic protection service efficiency;Inductive and capacitive coupled energy is isolated, makes ground potential voltage stabilization, improves cathodic protection service efficiency;Make equipment leakage and electrostatic effective grounding, protects electrical instrumentation safe operation;Make equipment thunder and lightning and switching overvoltage effective grounding, protect electric meter safe operation, reduces and dodge quick-fried event generation;Instantaneous tolerance and the high voltage conduction problem for solving simple lightning-protected product ground protection very well, provide the integrated ground function of electric meter in cathodic protection system.

Description

A kind of cathodic protection earth leakage protector
Technical field
The utility model is related to cathodic protection system technical field, more particularly to a kind of cathodic protection earth leakage protector.
Background technology
It is more and more to be concerned about electrical system grounded screen, steel as buried steel structure cathode protects the universal of system Structure periphery soil environment caused by cathodic protection system to negatively affecting.Especially electrical equipment itself component is had Capacitance, inductance characteristic, so that electrical equipment is passed through, ground wire is lasting to release capacitive character leakage current, inductive leakage current to connecing Earth mat increases so as to cause grounded screen entirety current potential.Ground potential crosses timing, and electric current can be flowed into from the earth by pipeline leakage point and be managed Road causes the cathodic protection power attenuation applied on pipeline serious, reduces the cathodic protection effect of pipeline.
Also, the ground connection of the meter case due to being connect with pipeline keeps pipeline cathode protection electric current big from instrumentation grounding point Amount flows into the earth, leads to cathodic protection power attenuation.The earth point of each instrument of station is the power damage of cathodic protection Point is consumed, a large amount of instrumentation grounding can cause cathodic protection system thoroughly to fail.
The prior art is mainly by by lightning protection such as spark gap, surge protector, low voltage surge arrester, Equipotential connectors Device is connected on ground wire to achieve the purpose that ground connection barrier.Lightning-protected product is electric current moment to be resistant to product, general electric current Tolerance time is Microsecond grade, can only be resistant to the energy of direct lightning strike, inductive lightning and switching overvoltage, without being resistant to electric meter leakage The long-time short circuit current that electricity generates.And since lightning-protected product conducting voltage is high, the electrostatic potential that electric meter generates is less than Lightning-protected product turn-on voltage, lightning-protected product can not play a protective role to electrostatic.
The prior art can only provide direct lightning strike, inductive lightning and switching overvoltage effective grounding, and electric meter cannot be made to leak Electricity, electrostatic effective grounding.
Utility model content
The purpose of this utility model is exactly to have overcome the deficiencies of the prior art and provide a kind of cathodic protection earth leakage protector, Lightning protected ground connection with direct lightning strike, inductive lightning, switching overvoltage, the electrical effective grounding with equipment leakage and electrostatic, The cathodic protection of cathodic protection ground connection, inductive and capacitive couplings ground connection is obstructed simultaneously.
The technical solution of the utility model is as follows:
A kind of cathodic protection earth leakage protector, including diode array, capacitance, the first decoupling inductance, the second decoupling inductance And lightning-protected product;The diode array is connected in parallel with the capacitance;The capacitance and the diode array parallel-connection structure Both ends be separately connected it is described first decoupling inductance, second decoupling inductance one end;The first decoupling inductance, the second decoupling electricity The other end of sense is separately connected the both ends of the lightning-protected product.
Further, the diode array is to be formed by the concatenated heavy-duty diode reverse parallel connection of two-way.
Further, the capacitance is electrodeless electric capacity, or the reverse parallel connection structure for polarized capacitance.
Further, the decoupling inductance is the decoupling device of the lightning-protected product, diode array, capacitance.
Further, the lightning-protected product is in spark gap, surge protector, low voltage surge arrester, Equipotential connector It is one or more.
Further, the heavy-duty diode is 50A or more cake formula diodes, per road series diode by multiple described Cake formula diode realizes series connection by way of crimping;Two-way series diode reverse parallel connection, realizes the isolation voltage of two-way 5V.
Further, include 10 cake formula diodes per road series diode.
Further, the decoupling inductance is using the microhenry grade that delay barrier properties are only presented to kHz grade frequencies above Inductance.
The beneficial effects of the utility model are:
1, isolation cathodic protection system ground connection, makes cathodic protection current be not lost in by being grounded, and improves cathodic protection and uses Efficiency;
2, inductive and capacitive coupled energy is isolated, makes ground potential voltage stabilization, improves cathodic protection service efficiency;
3, equipment leakage and electrostatic effective grounding, protection electrical instrumentation is made safely and effectively to run;
4, equipment thunder and lightning and switching overvoltage effective grounding, protection electric meter is made safely and effectively to run, reduce and dodge quick-fried thing Part occurs;
5, instantaneous tolerance and the high voltage conducting disadvantage for having well solved simple lightning-protected product ground protection, can provide the moon The integrated ground function of electric meter in pole protection system.
Description of the drawings
Fig. 1 show a kind of structural schematic diagram of cathodic protection earth leakage protector of the utility model embodiment.
Fig. 2 show a kind of cathodic protection earth leakage protector of the utility model case study on implementation and uses schematic diagram.
Wherein:1- cathodic protections grounding device, 2- diode arrays, 3- capacitances, 4- first decouple inductance, 5- second decouples electricity Sense, 6- lightning-protected products, 7- pipelines, 8- instrument, 9- solenoid valves.
Specific implementation mode
The utility model specific embodiment is described in detail below in conjunction with specific attached drawing.It should be noted that following implementations Example described in technical characteristic or technical characteristic combination be not construed as it is isolated, they can be combined with each other from And reach superior technique effect.In the attached drawing of following embodiments, the identical label that each attached drawing occurs represents identical spy Sign or component, can be applied in different embodiments.
As shown in Figure 1, a kind of cathodic protection earth leakage protector 1 of the utility model embodiment, including diode array 2, electricity Hold the 3, first decoupling inductance 4, second and decouples inductance 5 and lightning-protected product 6;The diode array 2 is in parallel with the capacitance 3 even It connects;The both ends of 2 parallel-connection structure of the capacitance 3 and the diode array are separately connected the first decoupling inductance 4, second and decouple One end of inductance 5, the capacitance 3 and 2 parallel-connection structure of the diode array decouple the decoupling electricity of inductance 4, second with described first It is series connection between sense 5;The other end that the first decoupling inductance 4, second decouples inductance 5 is separately connected the lightning-protected product 6 Both ends.
Preferably, the diode array 2 is to be formed by the concatenated heavy-duty diode reverse parallel connection of two-way, and cathode is protected Shield, inductive and capacitively coupled isolation voltage are controlled by increasing or decreasing the serial number of diode, and electrostatic passes through Diode connection in series-parallel array ground.
Preferably, the capacitance 3 is electrodeless electric capacity, or is the reverse parallel connection structure of polarized capacitance, utilizes capacitance 3 Separated by direct communication principle makes equipment ac leakage be grounded.
Preferably, the decoupling inductance 4,5 is the decoupling device of the lightning-protected product 6, diode array 2, capacitance 3;Profit Lightning-protected product 6 is set to have when product direct lightning strike, inductive lightning and switching overvoltage are protected with the high frequency barrier time-delay characteristics of inductance Effect acts.
Preferably, the lightning-protected product 6 is in spark gap, surge protector, low voltage surge arrester, Equipotential connector One or more, the residual voltage of lightning-protected product 6 should be less than the thunder and lightning pressure voltage of diode, capacitance 3.
Preferably, the heavy-duty diode is 50A or more cake formula diodes, per road series diode by multiple(Such as 10)The cake formula diode realizes series connection by way of crimping;Two-way series diode reverse parallel connection is, it can be achieved that two-way 5V Isolation voltage.
Embodiment
1, multiple Diode series are realized in Diode series part by 50A or more cake formula diodes by the way of crimping, Each 1 diode U10mA voltages are 0.5V, this example product isolation voltage is 5V, is made of 10 Diode series;
2, reverse parallel connection after two-way Diode series, product realize the isolation voltage of two-way 5V;
3, capacitance 3 be polarity free capacitor, capacitance be 4700 microfarads, polarity free capacitor 3 due to there is no positive-negative polarity, to 50 hz ACs can be leaked electricity and 50 hertz or more electric harmonic conductings are grounded;
4, decoupling inductance 4,5 uses microhenry grade inductance, and delay barrier properties only are presented to kHz grade frequencies above, to When keeping product lightning protected, thunder energy is protected by lightning-protected product 6, and is obstructed thunder energy and entered capacitance 3 and diode battle array 2 circuit of row;
5, lightning-protected product 6 uses multi-grade surge protection device parallel-connection structure, the U1mA voltages of surge protector to answer spouse, thunder and lightning Multi-grade surge protection device acts simultaneously when protection, disperses thunder energy.
The use of the utility model is further described below in conjunction with attached drawing 2:
1, instrument 8, solenoid valve 9 are connect with pipeline 7, and pipeline 7 implements cathodic protection, 7 above earth potential of pipeline generally- Between 0.85V ~ -1.2V;
If 2, not using cathodic protection earth leakage protector 1, the protective grounding of instrument 8 and solenoid valve 9 can be by cathodic protection electricity Position is released into ground, and cathodic protection system is caused to fail;
3, right when due to cathodic protection system normal operation after being mounted with the utility model cathodic protection earth leakage protector 1 Ground voltage is less than the isolation voltage of diode array 2, and cathodic protection system can guarantee normal operation, when electric meter 8 leaks When electricity or electrostatic, 3 interoperation of diode array 2 and capacitance protects equipment and personal safety to which harmful energy to be grounded, When lightning ingress, surge protector action, to realize the purpose of lightning protection.Cathodic protection earth leakage protector 1 is installed on Between electrical equipment, instrument 8 and grounded screen, isolation current potential is set as ± 5V(Also it can be adjusted according to specific requirement), Ke Yiyou The prevention capacitive character leakage current and inductive leakage current of effect are released to geodetic network, and the ground connection of instrument 8 is carried out small current potential with pipeline 7 Isolation, the ground connection effect without influencing electrical equipment, instrument short circuit, thunder and lightning etc..The product can be effectively protected buried steel Structure is not influenced by the ground connection of electrical equipment and instrument, ensures that cathodic protection system is safely and effectively run.
Although having been presented for several embodiments of the utility model herein, those skilled in the art should manage Solution, in the case where not departing from the spirit of the present invention, can be changed the embodiments herein.Above-described embodiment only shows Example property, it should not be using the embodiments herein as the restriction of the utility model interest field.

Claims (8)

1. a kind of cathodic protection earth leakage protector, which is characterized in that including diode array, capacitance, the first decoupling inductance, second Decouple inductance and lightning-protected product;The diode array is connected in parallel with the capacitance;The capacitance and the diode array The both ends of parallel-connection structure are separately connected one end of the first decoupling inductance, the second decoupling inductance;The first decoupling inductance, the The other end of two decoupling inductance is separately connected the both ends of the lightning-protected product.
2. cathodic protection earth leakage protector as described in claim 1, which is characterized in that the diode array is by two-way string The heavy-duty diode reverse parallel connection of connection is formed.
3. cathodic protection earth leakage protector as described in claim 1, which is characterized in that the capacitance is electrodeless electric capacity, or For the reverse parallel connection structure of polarized capacitance.
4. cathodic protection earth leakage protector as described in claim 1, which is characterized in that the decoupling inductance produces for the lightning protection The decoupling device of product, diode array, capacitance.
5. cathodic protection earth leakage protector as described in claim 1, which is characterized in that the lightning-protected product be spark gap, It is one or more in surge protector, low voltage surge arrester, Equipotential connector.
6. cathodic protection earth leakage protector as claimed in claim 2, which is characterized in that the heavy-duty diode be 50A with Upper cake formula diode realizes series connection by multiple cake formula diodes per road series diode by way of crimping;Two-way string Union II pole pipe reverse parallel connection, realizes the isolation voltage of two-way 5V.
7. cathodic protection earth leakage protector as claimed in claim 6, which is characterized in that include 10 cakes per road series diode Formula diode.
8. such as claim 1-7 any one of them cathodic protection earth leakage protectors, which is characterized in that the decoupling inductance uses The microhenry grade inductance of delay barrier properties is only presented to kHz grade frequencies above.
CN201820141349.0U 2018-01-29 2018-01-29 A kind of cathodic protection earth leakage protector Expired - Fee Related CN207775359U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820141349.0U CN207775359U (en) 2018-01-29 2018-01-29 A kind of cathodic protection earth leakage protector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820141349.0U CN207775359U (en) 2018-01-29 2018-01-29 A kind of cathodic protection earth leakage protector

Publications (1)

Publication Number Publication Date
CN207775359U true CN207775359U (en) 2018-08-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112747258A (en) * 2019-10-30 2021-05-04 中国石油化工股份有限公司 Oil pipeline heating method and system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112747258A (en) * 2019-10-30 2021-05-04 中国石油化工股份有限公司 Oil pipeline heating method and system

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20180828

Termination date: 20200129

CF01 Termination of patent right due to non-payment of annual fee