CN105586596A - Pipeline corrosion and protection experiment system - Google Patents
Pipeline corrosion and protection experiment system Download PDFInfo
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- CN105586596A CN105586596A CN201610183859.XA CN201610183859A CN105586596A CN 105586596 A CN105586596 A CN 105586596A CN 201610183859 A CN201610183859 A CN 201610183859A CN 105586596 A CN105586596 A CN 105586596A
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- utmost point
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/22—Monitoring arrangements therefor
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/04—Controlling or regulating desired parameters
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A pipeline corrosion and protection experiment system comprises a pipeline corrosion preventing layer defect detecting experiment system and a cathodic protection and interference detection experiment system. The pipeline corrosion preventing layer defect detecting experiment system comprises test connection boxes arranged in different axial directions of a pipeline, test blocks pre-buried in different circumferential directions of the pipeline are arranged in the test connection boxes, and the cathodic protection and interference detection experiment system comprises a console and interference accessory equipment. The technical problems that in the prior art, in a single experiment method, all kinds of interference and actual conditions cannot be combined to do a complete experiment, the real environment of a pipeline is hard to represent, ad test precision cannot be guaranteed are solved. According to the experiment system, the real condition can be highly restored, and corrosion prevention and protection detection is carried out on the pipeline comprehensively and accurately.
Description
Technical field
The invention belongs to Oil & Gas Pipeline Testing field, a kind of corrosive pipeline and prevention system are particularly provided.
Background technology
At present, oil and gas pipes is widely used. along with the construction in public corridor, complicated due to actual environment, it is more general that the interference of AC/DC becomes, can affect the test process of pipeline corrosion protection system, due to site environment complexity, go to toward need to verify the accuracy of detection of equipment detecting, existing equipment adopts laboratory testing rig more, the reproduction of more difficult realization to pipeline true environment, and single test method can not comprehensive various interference and actual conditions do complete test, just cannot ensure thus the precision of test, can say and also there is no the online pipeline true environment of accomplishing that a kind of experimental facilities can be real, and it is detected effectively accurately.
Summary of the invention
In order to solve the problems of the technologies described above; the invention provides a kind of corrosive pipeline and prevention system; comprising by pipeline anticorrosion coating defects detection pilot system and cathodic protection and Interference Detection pilot system; in pipeline anticorrosion coating defects detection pilot system, include and be arranged on pipeline disalignment test junction box upwards; in test junction box, include and be embedded in the test piece upwards of different weeks of pipeline, in cathodic protection and Interference Detection pilot system, include console and disturb accessory device. By said apparatus in conjunction with application, solved in prior art, exist single test method can not comprehensive various interference and actual conditions do complete test, the reproduction of more difficult realization to pipeline true environment, cannot ensure the technical problem of accurate testing degree.
To achieve these goals, the technical solution used in the present invention is: a kind of corrosive pipeline and prevention system, is characterized in that: include cathodic protection and Interference Detection experimental system and pipeline anticorrosion coating defects detection pilot system;
The on off operating mode of electronic switch in industrial computer control potentiostat output switching unit and disturbance state switch unit in cathodic protection and Interference Detection experimental system, thereby the potentiostat of control connection under potentiostat output switching unit and be connected to the rectifier under disturbance state switch unit, the signal output state of pressure regulator, be connected with cathodic protection external circuit at the signal output part of potentiostat, the signal output part of rectifier is connected with direct current and disturbs external circuit, the signal output part of pressure regulator is connected with to exchange and disturbs external circuit, cathodic protection external circuit, direct current disturbs external circuit to disturb external circuit jointly to form external circuit with exchanging, the information of external circuit is transferred to industrial computer by data acquisition module again, and show by the output equipment being connected on industrial computer, on industrial computer, be connected with input equipment, be used for input of control commands,
Pipeline anticorrosion coating defects detection pilot system is made up of several pipeline corrosion protection system testing junction boxes that are arranged on simulation pipeline, each pipeline corrosion protection system testing junction box is connected with the test piece of different exposed areas by cable, by the test piece of different exposed areas be embedded in simulation pipeline difference week upwards, and by several pipeline corrosion protection system testing junction boxes be arranged on simulation pipeline disalignment upwards, by being transferred in display device and showing after data collecting module collected experiment information.
In cathodic protection external circuit in described cathodic protection and Interference Detection experimental system, include reference electrode I, impressed current anode and simulation pipeline, reference electrode I, impressed current anode and simulation pipeline are connected with potentiostat by potentiostat output switching unit, for external circuit provides cathodic protection;
Direct current disturbs external circuit by simulating pipeline, disturb utmost point c and disturbing utmost point d to form, by the electronic switch in industrial computer control disturbance state switch unit, thereby select access to disturb utmost point c or disturb utmost point d or disturb utmost point c jointly to access simulation pipeline with disturbing utmost point d, disturbing for external circuit provides direct current;
Exchange and disturb external circuit by simulating pipeline, disturb utmost point a and disturbing utmost point b to form, by by the electronic switch in industrial computer control disturbance state switch unit, thereby select access to disturb utmost point a or disturb utmost point b or disturb utmost point a jointly to access simulation pipeline with disturbing utmost point b, disturbing for external circuit provides to exchange.
On pipeline corrosion protection system testing junction box's test terminal plate, be provided with air switch, calibrating terminal, reference electrode binding post, pipeline conductive connector, test piece binding post, D.C. voltmeter and A.C. voltmeter; Simulation pipeline is connected with pipeline calibrating terminal and pipeline conductive connector respectively by wire; Reference electrode II is wired on reference electrode binding post; Each test piece is connected with a test piece binding post, is wired to the two ends of air switch, by the on off operating mode of this circuit of air switch control between pipeline conductive connector and test piece binding post.
Between described rectifier and disturbance state switch unit, be in series with overload protection and resistor; resistor is connected with direct current interference adjustments knob; be used for regulating direct current to disturb size, and by the size of current of DC voltage device for digit-displaying and the direct current disturbance current device for digit-displaying interference voltages that demonstration applies in real time and direct current interference.
Described pressure regulator provides interchange disturbance current for external circuit; before be equipped with isolating transformer for isolated high voltage; between pressure regulator and disturbance state switch unit, be in series with overload protection and electric capacity; electric capacity is connected with interchange interference adjustments knob; be used for regulating exchanging and disturb size, alternating voltage device for digit-displaying and exchange interchange interference voltage that interference adjustments knob applies for real-time demonstration and exchange disturbance current size.
Two binding posts of described D.C. voltmeter and A.C. voltmeter are connected with pipeline test wiring pile, reference electrode binding post by wire respectively, protect current potential and disturbed condition for the moon of real-time display pipes.
The beneficial effect of the invention is: the present invention passes through said structure; comprise by pipeline anticorrosion coating defects detection pilot system and cathodic protection and Interference Detection pilot system; in pipeline anticorrosion coating defects detection pilot system, include and be arranged on pipeline disalignment test junction box upwards; in test junction box, include and be embedded in the test piece upwards of different weeks of pipeline, in cathodic protection and Interference Detection pilot system, include console and disturb accessory device. Provide the one can height rediscover environment, and comprehensive and accurate pipeline has been carried out to the anticorrosion experimental system detecting with protection.
Brief description of the drawings
Fig. 1: for the present invention is electrically connected schematic diagram.
Fig. 2: be the catenation principle figure of cathodic protection in the present invention and interference test system.
Fig. 3: be the control panel layout drawing of Fig. 2.
Fig. 4: be the structural representation of pipeline corrosion protection system testing junction box in the present invention.
Fig. 5: for testing terminal plate distribution map in Fig. 4.
Detailed description of the invention
A kind of corrosive pipeline and prevention system, its structure is: include cathodic protection and Interference Detection experimental system and pipeline anticorrosion coating defects detection pilot system;
In cathodic protection and Interference Detection experimental system, industrial computer 1 is controlled the on off operating mode of electronic switch in potentiostat output switching unit 8 and disturbance state switch unit 29, thereby the potentiostat of control connection under potentiostat output switching unit 8 and be connected to the rectifier 19 under disturbance state switch unit 29, the signal output state of pressure regulator 25, be connected with cathodic protection external circuit at the signal output part of potentiostat, the signal output part of rectifier 19 is connected with direct current and disturbs external circuit, the signal output part of pressure regulator 25 is connected with to exchange and disturbs external circuit, cathodic protection external circuit, direct current disturbs external circuit to disturb external circuit jointly to form external circuit with exchanging, the information of external circuit is transferred to industrial computer by data acquisition module 4 again, and show by the output equipment 2 being connected on industrial computer, on industrial computer 1, be connected with input equipment 3, be used for input of control commands.
In described cathodic protection external circuit, include reference electrode I45, impressed current anode 7 and simulation pipeline 5; reference electrode I45, impressed current anode 7 and simulation pipeline 5 are connected with potentiostat by potentiostat output switching unit 8, for external circuit provides cathodic protection.
Described direct current disturbs external circuit by simulating pipeline 5, disturb utmost point c42 and disturbing utmost point d43 to form, control the electronic switch in disturbance state switch unit 29 by industrial computer 1, thereby select access to disturb utmost point c42 or disturb utmost point d43 or disturb utmost point c42 jointly to access simulation pipeline 5 with disturbing utmost point d43, disturbing for external circuit provides direct current.
Described interchange disturbs external circuit by simulating pipeline 5, disturb utmost point a40 and disturbing utmost point b41 to form, by controlling the electronic switch in disturbance state switch unit 29 by industrial computer 1, thereby select access to disturb utmost point a40 or disturb utmost point b41 or disturb utmost point a40 jointly to access simulation pipeline 5 with disturbing utmost point b41, disturbing for external circuit provides to exchange.
Between described rectifier 19 and disturbance state switch unit 29, be in series with overload protection and resistor; resistor is connected with direct current interference adjustments knob 46; be used for regulating direct current to disturb size, and by the size of current of DC voltage device for digit-displaying 11 and direct current disturbance current device for digit-displaying 15 interference voltages that demonstration applies in real time and direct current interference.
Described pressure regulator 25 provides interchange disturbance current for external circuit; before be equipped with isolating transformer 24 for isolated high voltage; between pressure regulator 25 and disturbance state switch unit 29, be in series with overload protection and electric capacity; electric capacity is connected with interchange interference adjustments knob 16; be used for regulating exchanging and disturb size, alternating voltage device for digit-displaying 13 and exchange interchange interference voltage that interference adjustments knob 16 applies for real-time demonstration and exchange disturbance current size.
It is voltage difference that described data acquisition module 4 is implemented to gather between simulation pipeline 5 and reference electrode I45, shows on output equipment 2 as feedback signal.
Described potentiostat includes potentiostat I17 and potentiostat II18, and one as work potentiostat, and one as potentiostat for subsequent use, controls two selection and switchings between potentiostat by potentiostat output switching unit 8.
The control method of pipeline cathode protection and interference mixing console, the steps include:
1) be, control general supply input by manual master switch 10, whole system power supply;
2), use potentiostat change-over switch 48 to select potentiostat I17 or the potentiostat II18 of access, also can in industrial computer 1 control program, be set as automatic operational mode;
3), can manually and automatically switch by direct current interference simulation switch knob 12:
3a), under automatic mode, start the preset working procedure being written into, complete multiple interference operating mode;
3b), under manual mode, can be manually opened or close the electronic switch in disturbance state switch unit 29, select the interference utmost point c42 of access or disturb utmost point d43, maybe will disturb utmost point c42 and disturb utmost point d43 to access simultaneously, by regulating direct current interference adjustments knob 46 to regulate direct current to disturb size;
4), can manually and automatically switch by exchanging interference adjustments knob 16:
4a), under automatic mode, start the preset working procedure being written into, complete multiple interference operating mode;
4b), under manual mode, can be manually opened or close the electronic switch in disturbance state switch unit 29, the interference utmost point a40 or the interference utmost point b41 that select access, maybe will disturb utmost point a40 and disturb the utmost point to disturb utmost point b41 to access simultaneously, exchange interference adjustments knob 16 regulate interchange to disturb size by adjusting.
5), on output equipment 2 reading result, and record.
When concrete use:
Industrial computer 1 is controlled potentiostat output switching unit 8 and disturbance state switch unit 29 in mixing console by control module 44. Aspect power supply input, manually master switch 10 is controlled general supply input, and hand switch I47 controls the power supply input of isolating transformer 24 and pressure regulator 25, and hand switch II49 controls the power supply input of rectifier 19. All adopt analog power lamp to show the power supply status of each equipment. Mouse and the keyboard of input equipment 3 for being connected with industrial computer 1; The liquid crystal display of output equipment 2 for being connected with industrial computer 1. Potentiostat change-over switch 48 is controlled the power supply input of potentiostat I17 and potentiostat II18 and is switched.
Cathodic protection external circuit forms by simulating pipeline 5, reference electrode I45 and impressed current anode 7. Under real-time Simulation condition, potentiostat I17 or potentiostat II18 provide cathodic protection current for external circuit. Potentiostat output switching unit 8 is made up of electronic switch set 9, can be under the control of industrial computer 1 manual closure or openness, realize the switching between potentiostat I17 and potentiostat II18, also can in industrial computer 1 control program, set automatic operational mode.
The external circuit that direct current disturbs is by simulating pipeline 5, disturb utmost point c42 and disturbing utmost point d43 to form. Rectifier 19 provides direct current disturbance current for external circuit. Overload protection I20 and overload protection II22 protect output loop. Resistor I21 and resistor II23, be connected with the direct current interference adjustments knob 46 in accompanying drawing 2, can be used for regulating direct current to disturb size. Direct current disturbs operation to comprise manually and automatic two kinds of operational modes, can automatically and manually switch by the direct current interference simulation switch knob 12 on control panel. Under automatic mode, can be written into the preset multiple interference operating mode of working procedure. Under manual mode, can be manually opened or close the electronic switch a30 of disturbance state switch unit 29, electronic switch b31, electronic switch c32, electronic switch d33, electronic switch e34, electronic switch f35, electronic switch g36, electronic switch h37, electronic switch i38. DC voltage device for digit-displaying 11 and direct current disturbance current device for digit-displaying 15 are for showing in real time the interference voltages and the direct current disturbance current size that apply.
Exchange the external circuit of disturbing by simulating pipeline 5 and disturbing utmost point a40, interference utmost point b41 to form. Pressure regulator 25 provides interchange disturbance current for external circuit. Preposition isolating transformer 24 is for preventing that high voltage may be to the damage of inner member. Overload protection III26 protects output loop. Electric capacity 27, is connected with the interchange interference adjustments knob 16 in accompanying drawing 2, can be used for regulating exchanging disturbing size. Exchange and disturb operation to comprise manually and automatic two kinds of operational modes, can automatically and manually switch by the interchange jamming pattern switch knob 14 on control panel. Under automatic mode, can be written into the preset multiple interference operating mode of working procedure. Under manual mode, can be manually opened or close the electronic switch a30 of disturbance state switch unit 29, electronic switch b31, electronic switch c32, electronic switch d33, electronic switch e34, electronic switch f35, electronic switch g36, electronic switch h37, electronic switch i38, electronic switch j39. Exchange interference adjustments knob 16 for regulating interchange annoyance level. Alternating voltage device for digit-displaying 13 and alternating current device for digit-displaying 28 are for showing in real time exchanging interference voltage and exchanging disturbance current size of applying.
Rectifier 19 and pressure regulator 25 can be worked simultaneously, the complex conditions disturbing for simulating alternating current-direct current. Electronic switch g36 in disturbance state switch unit 29 and electronic switch i38, electronic switch h37 and electronic switch j39, electronic switch a30 and electronic switch c32 have mutual repulsion effect, can not be simultaneously closed.
Potential difference between data acquisition module 4 Real-time Collection external circuit simulation pipelines 5 and reference electrode I45 as feedback signal, shows, and can be kept in industrial computer 1 hard disk on output equipment 2.
Under simulated conditions, industrial computer 1 does not carry out physical connection with hardware unit, only in main control system according to configuration parameter and move tactful virtual operation. Under demonstration condition, the real-time and emulated data of storage in the past can be carried out to playback demonstration on output equipment 2.
As Figure 2-3, industrial computer 1 adopts ADVANTECH610L Industrial Control Computer, and supporting control software PC-GDF2 is installed; Output equipment 2 adopts liquid crystal display; Input equipment 3 adopts Logitech mouse and keyboard; Data acquisition module 4 adopts ADAM4069 type acquisition module; Simulation pipeline 5 adopts the buried steel pipe of diameter 159mm; Reference electrode I45 adopts copper sulfate reference electrode; Impressed current anode 7 adopts the steel pipe of diameter 106mm; Electronic DC switch adopts solid-state relay; Electronic AC switch adopts auxiliary reclay; Potentiostat I17 adopts PS-1LC type potentiostat; Potentiostat II18 adopts IHF type potentiostat; Rectifier 19 adopts rated output voltage 100V, the single-phase full-controlled rectifier voltage regulating module of electric current 20A; Overload protection I20, overload protection II22, overload protection III26 adopts RGS4 type fuse; Resistor I21, resistor II23 adopts carbon film adjustable resistance; Isolating transformer 24 adopts single-phase shielding isolating transformer, and enter/50V of rated output power 3kVA(220V goes out); Pressure regulator 25 adopts the single-phase voltage regulating module of the full isolation of intelligence, and rated output power 1kVA(can regulate within the scope of 0～50V); Electric capacity 27 adopts tunable capacitor; Disturb utmost point a40, disturb utmost point b41, disturb utmost point c42, disturb utmost point d43 to adopt the steel pipe of diameter 106mm; Control module 44 adopts ADAM4069 control module; Hand switch adopts round button, band LED light; DC voltage device for digit-displaying 11, alternating voltage device for digit-displaying 13, direct current disturbance current device for digit-displaying 15, alternating current device for digit-displaying 28 adopt SX48 digital displaying meter; Direct current interference simulation switch knob 12, interchange jamming pattern switch knob 14, potentiostat change-over switch 48 adopt rotary switch; Direct current interference adjustments knob 46 adopts adjustable resistor; Exchange interference adjustments knob 16 and adopt tunable capacitor.
Pipeline anticorrosion coating defects detection pilot system forms by being arranged on simulation pipeline 5 several pipeline corrosion protection system testing junction boxes 6 around, each pipeline corrosion protection system testing junction box 6 is connected with the test piece 6-3 of different exposed areas by cable, by the test piece 6-3 of different exposed areas be embedded in simulation pipeline 5 difference week upwards, and the disalignment that several pipeline corrosion protection system testing junction boxes 6 are arranged on to simulation pipeline 5 upwards, gathered after experiment information and be transferred in display device and show by data acquisition module 4.
On pipeline corrosion protection system testing junction box 6 test terminal plate 6-13, be provided with air switch I6-23, calibrating terminal 6-15, reference electrode binding post 6-16, pipeline conductive connector 6-17, test piece binding post I6-18, D.C. voltmeter 6-9 and A.C. voltmeter 6-10; Simulation pipeline 5 is connected with pipeline calibrating terminal 6-15 and pipeline conductive connector 6-17 respectively by wire; Reference electrode II6-2 is wired on reference electrode binding post 6-16; Each test piece 6-3 is connected with a test piece binding post, is wired to the two ends of air switch, by the on off operating mode of this circuit of air switch control between pipeline conductive connector 6-17 and test piece binding post. Two binding posts of described D.C. voltmeter 6-9 and A.C. voltmeter 6-10 are connected with pipeline test wiring pile 6-15, reference electrode binding post 6-16 by wire respectively, protect current potential and disturbed condition for the moon of real-time display pipes.
Test terminal plate 6-13 is arranged in casing 6-7 by screw 6-14, and it is upper that casing 6-7 is arranged on base 6-5 by support 6-6, D.C. voltmeter 6-9 and A.C. voltmeter 6-10 by the perforate on casing 6-7 in casing exterior visual. On test terminal plate 6-13, be also provided with binding post 6-22 for subsequent use. On casing 6-7, be provided with door lock 6-11, test terminal plate 6-13 and internal structure are locked in to casing 6-7 inside.
Casing 6-7 and support 6-6, can weld between support 6-6 and base 6-5 or bolt is connected. Casing 6-7 is provided with nameplate 6-8 and door lock 6-11. Test terminal plate 6-13 is fixed on casing 6-7 by screw 6-14. On test terminal plate 6-13, be provided with D.C. voltmeter 6-9, A.C. voltmeter 6-10, pipeline calibrating terminal 6-15, reference electrode binding post 6-16, pipeline conductive connector 6-17, test piece binding post I6-18, test piece binding post II6-19, test piece binding post III6-20, test piece binding post IV6-21, binding post 6-22 for subsequent use, air switch I6-23, air switch II6-24, air switch III6-25, air switch IV6-26. Each binding post is all connected with rubber socket. D.C. voltmeter 6-9, A.C. voltmeter 6-10 are exposed in air by the perforate on casing 6-7, adopt plexiglass tent to protect. Simulation pipeline 5 is connected respectively on pipeline calibrating terminal 6-15 and pipeline conductive connector 6-17 by two pipeline wire 6-12. Reference electrode II6-2 is connected on reference electrode binding post 6-16 by reference electrode wire 6-12. Test piece 6-3 is connected on test piece binding post I16-8 by test piece wire 6-4. Test piece 6-3 has the fixing bare area of different sizes, and all the other positions except exposed part adopt epoxy resin and heat shrinking sleeve seal protection. The corresponding test piece binding post of each test piece 6-3 and an air switch, be wired to respectively the two ends of air switch between pipeline conductive connector 6-17 and test piece binding post. By the different air switch of closure, the deficiency of protection coating of diverse location, different sizes can be electrically connected with pipeline, for simulating deficiency of protection coating. Two binding posts of D.C. voltmeter 6-9, A.C. voltmeter 6-10 are connected with pipeline calibrating terminal 6-15 and reference electrode binding post 6-16 by wire respectively, protect current potential and disturbed condition for the moon of real-time display pipes.
Reference electrode II6-2 adopts copper sulfate reference electrode; Test piece 6-3 adopts the test piece of 16Mn material, and bare area is respectively 1mm2、10mm2、100mm2Not etc., exposed part does not adopt epoxy resin and heat shrinking sleeve seal protection, can be as required while specifically use, and the quantity of expansion or minimizing test piece 6-3. Test piece wire 6-4 adopts 10mm2VV wire.
Use cathodic protection and Interference Detection pilot system to disturb pipeline; Reality simulation interference environment; use pipeline anticorrosion coating defects detection pilot system to simulate pipeline corrosion protection defect, can reduce to the full extent thus actual environment, improve accuracy in detection.
Claims (6)
1. corrosive pipeline and a prevention system, is characterized in that: include cathodic protection and Interference Detection experimental system and pipeline anticorrosion coating defects detection pilot system;
In cathodic protection and Interference Detection experimental system, industrial computer (1) is controlled the on off operating mode of electronic switch in potentiostat output switching unit (8) and disturbance state switch unit (29), thereby the potentiostat of control connection under potentiostat output switching unit (8) and be connected to the rectifier (19) under disturbance state switch unit (29), the signal output state of pressure regulator (25), be connected with cathodic protection external circuit at the signal output part of potentiostat, the signal output part of rectifier (19) is connected with direct current and disturbs external circuit, the signal output part of pressure regulator (25) is connected with to exchange and disturbs external circuit, cathodic protection external circuit, direct current disturbs external circuit to disturb external circuit jointly to form external circuit with exchanging, the information of external circuit is transferred to industrial computer by data acquisition module (4) again, and show by the output equipment (2) being connected on industrial computer, on industrial computer (1), be connected with input equipment (3), be used for input of control commands,
Pipeline anticorrosion coating defects detection pilot system forms by being arranged on simulation pipeline (5) several pipeline corrosion protection system testing junction boxes (6) around, each pipeline corrosion protection system testing junction box (6) is connected with the test piece (6-3) of different exposed areas by cable, by the test piece of different exposed areas (6-3) be embedded in simulation pipeline (5) difference week upwards, and several pipeline corrosion protection system testing junction boxes (6) are arranged on the different axial locations of simulation pipeline (5), by being transferred in display device and showing after data acquisition module (4) collection experiment information.
2. a kind of corrosive pipeline according to claim 1 and prevention system, it is characterized in that: in the cathodic protection external circuit in described cathodic protection and Interference Detection experimental system, include reference electrode I(45), impressed current anode (7) and simulation pipeline (5), reference electrode I(45), impressed current anode (7) with simulation pipeline (5) be connected with potentiostat by potentiostat output switching unit (8), for external circuit provides cathodic protection;
Direct current disturbs external circuit by simulating pipeline (5), disturbing utmost point c(42) and disturb utmost point d(43) form, control the electronic switch in disturbance state switch unit (29) by industrial computer (1), thereby utmost point c(42 is disturbed in selection access) or disturb utmost point d(43) or disturb utmost point c(42) and disturb utmost point d(43) common access simulation pipeline (5), for external circuit provides direct current interference;
Exchange and disturb external circuit by simulating pipeline (5), disturbing utmost point a(40) and disturb utmost point b(41) form, by controlling the electronic switch in disturbance state switch unit (29) by industrial computer (1), thereby utmost point a(40 is disturbed in selection access) or disturb utmost point b(41) or disturb utmost point a(40) and disturb utmost point b(41) common access simulation pipeline (5), for providing interchange, external circuit disturbs.
3. a kind of corrosive pipeline according to claim 1 and prevention system, is characterized in that: on pipeline corrosion protection system testing junction box's (6) test terminal plate (6-13), be provided with air switch I(6-23), calibrating terminal (6-15), reference electrode binding post (6-16), pipeline conductive connector (6-17), test piece binding post I(6-18), D.C. voltmeter (6-9) and A.C. voltmeter (6-10); Simulation pipeline (5) is connected with pipeline calibrating terminal (6-15) and pipeline conductive connector (6-17) respectively by wire; Reference electrode II(6-2) be wired on reference electrode binding post (6-16); Each test piece (6-3) is connected with a test piece binding post, is wired to the two ends of air switch, by the on off operating mode of this circuit of air switch control between pipeline conductive connector (6-17) and test piece binding post.
4. a kind of corrosive pipeline according to claim 2 and prevention system; it is characterized in that: between described rectifier (19) and disturbance state switch unit (29), be in series with overload protection and resistor; resistor is connected with direct current interference adjustments knob (46); be used for regulating direct current to disturb size, and by the size of current of DC voltage device for digit-displaying (11) and direct current disturbance current device for digit-displaying (15) interference voltages that demonstration applies in real time and direct current interference.
5. a kind of corrosive pipeline according to claim 2 and prevention system, it is characterized in that: described pressure regulator (25) provides interchange disturbance current for external circuit, before be equipped with isolating transformer (24) for isolated high voltage, between pressure regulator (25) and disturbance state switch unit (29), be in series with overload protection and electric capacity, electric capacity is connected with interchange interference adjustments knob (16), be used for regulating exchanging and disturb size, alternating voltage device for digit-displaying (13) with exchange interference adjustments knob (16) for showing in real time the interchange interference voltage that applies and exchanging disturbance current size.
6. a kind of corrosive pipeline according to claim 3 and prevention system, it is characterized in that: described D.C. voltmeter (6-9) is connected with pipeline test wiring pile (6-15), reference electrode binding post (6-16) by wire respectively with two binding posts of A.C. voltmeter (6-10), protects current potential and disturbed condition for the moon of real-time display pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610183859.XA CN105586596A (en) | 2016-03-28 | 2016-03-28 | Pipeline corrosion and protection experiment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610183859.XA CN105586596A (en) | 2016-03-28 | 2016-03-28 | Pipeline corrosion and protection experiment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105586596A true CN105586596A (en) | 2016-05-18 |
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| CN107502898A (en) * | 2017-10-17 | 2017-12-22 | 上海燃气浦东销售有限公司 | High-efficiency high-accuracy pipeline corrosion protection status remote monitoring system |
| CN108070867A (en) * | 2016-11-08 | 2018-05-25 | 中国石油天然气股份有限公司 | Cathodic protection monitoring method and device |
| CN109161904A (en) * | 2018-10-30 | 2019-01-08 | 广州发展集团股份有限公司 | Buried pipeline potential detecting system and method |
| CN110865022A (en) * | 2019-12-05 | 2020-03-06 | 西南石油大学 | Metal pipeline corrosion experiment device and method under alternating current-direct current hybrid interference |
| CN113624667A (en) * | 2020-05-09 | 2021-11-09 | 中国石油天然气股份有限公司 | Method for determining service life of long oil and gas transmission pipeline |
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| CN113624667B (en) * | 2020-05-09 | 2024-05-28 | 中国石油天然气股份有限公司 | Method for determining service life of long oil and gas pipeline |
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