CN107815690A - A kind of pipeline corrosion protection device - Google Patents
A kind of pipeline corrosion protection device Download PDFInfo
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- CN107815690A CN107815690A CN201711284302.6A CN201711284302A CN107815690A CN 107815690 A CN107815690 A CN 107815690A CN 201711284302 A CN201711284302 A CN 201711284302A CN 107815690 A CN107815690 A CN 107815690A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 26
- 230000007797 corrosion Effects 0.000 title claims abstract description 24
- 230000009466 transformation Effects 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 230000004888 barrier function Effects 0.000 claims description 6
- 230000002421 anti-septic effect Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 7
- 230000006698 induction Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
Classifications
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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
- C23F13/20—Conducting electric current to electrodes
-
- 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
-
- 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
-
- 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
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/10—Controlling or regulating parameters
-
- 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
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/32—Pipes
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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)
Abstract
The present invention discloses a kind of pipeline corrosion protection device, the anti-corrosive apparatus specifically includes Pulse width modulation module, voltage of transformation output module, digital signal processing module, detection module, earthing pole, the anticorrosive coat connection of the voltage of transformation output module and pipeline, detection module are used to detect the pipe ground voltage and pipe earth-current between pipeline and the earth；Digital signal processing module is used for according to the pipe ground voltage, pipe earth-current, reference voltage and reference current output voltage difference and current differential；Pulse width modulation module is used to modulate pulsewidth according to the voltage difference and the current differential, obtains modulated signal；Voltage of transformation output module is connected with the Pulse width modulation module, and the pipe earth-current and the reference current are equal.By setting Pulse width modulation module and digital signal processing module, keep pipe earth-current and pipe ground voltage equal, the antiseptic effect of pipeline is improved under the influence of stray electrical current.
Description
Technical field
The present invention relates to corrosive pipeline and protection field, more particularly to a kind of pipeline corrosion protection device.
Background technology
The DC current flowed out from the earthing pole of HVDC transmission line, its transmission path and buried pipeline have it is overlapping or
When being that spacing is too small, electric current will be from flow ipe at the external anti-corrosion layer weak spot of buried pipeline, the interference electricity of shape twin conduit
Stream.After this interference electric current in soil can transmit a segment distance in the duct, flowed out at pipeline external anti-corrosion layer breaking point,
Return in soil.Interference electric current leaves the position of pipeline, and the current potential of body occurs forward migration, forms anode region, body will
Violent cell reaction occurs, the metal of body is oxidized, and rapid erosion in the form of the oxide is lost, and causes body to be thinned or even wear
Hole.This phenomenon for causing pipe body corrosion due to DC influence electric current is stray current corrosion.
Pipeline cathode protection device of the prior art, using the control mode of opened loop control, keep cathode protection device
Output voltage and output current it is constant, can not avoid by influence of the HVDC transmission line to cathode protection device.
Be directed to corrosive pipeline caused by stray electrical current, in the prior art using forced drainage method, pipeline and rail it
Between a rectifier is set, play a part of control of Electric potentials, exist in outside and force under conditions of potential difference to carry out drainage, still
Current potential between pipe ground is controlled only by rectifier, causes control of Electric potentials between pipe ground inaccurate, antiseptic effect is poor.
The content of the invention
It is an object of the invention to provide a kind of pipe that antiseptic effect can be improved by the current potential between accurate control pipe ground
Road anti-corrosive apparatus.
To achieve the above object, the invention provides following scheme：
A kind of pipeline corrosion protection device, the anticorrosive coat connection of the anti-corrosive apparatus and pipeline, the anti-corrosive apparatus specifically include：
Pulse width modulation module, voltage of transformation output module, digital signal processing module, detection module, earthing pole；
The anticorrosive coat connection of the voltage of transformation output module and pipeline, the earthing pole ground connection, the voltage of transformation are defeated
Go out module, the anticorrosive coat of the pipeline and the earth and form closed-loop path；
The detection module is connected with the anticorrosive coat of the pipeline, and the detection module is used to detect between pipeline and the earth
Pipe ground voltage and pipe earth-current；
The digital signal processing module is connected with the detection module, and the digital signal processing module is provided with reference
Voltage and reference current, the digital signal processing module be used to calculating the pipe ground voltage and voltage difference, the pipe
The current differential of electric current and the reference current；
The Pulse width modulation module is connected with the digital signal processing module, and the Pulse width modulation module is used
In modulating pulsewidth according to the voltage difference and the current differential, modulated signal is obtained；
The voltage of transformation output module is connected with the Pulse width modulation module, and the voltage of transformation output module is used
In controlling voltage of transformation according to the modulated signal, make the pipe ground voltage and the reference voltage equal, the pipe earth-current
It is equal with the reference current.
Optionally, the voltage of transformation output module specifically includes：
Single-phase transformer；When 380V alternating voltages are input to the single-phase transformer, the single-phase transformer exports low pressure
Voltage；
Schottky barrier diodes, it is connected with the individual event transformer, for the low voltage rectification to be obtained into rectification
Voltage；
Buck conversion circuit, it is connected respectively with the Schottky barrier diodes and the Pulse width modulation module,
For adjusting the commutating voltage according to the pulse-width signal, the voltage of transformation is obtained.
Optionally, the detection module specifically includes：
Hall current sensor, it is connected, is used for the anticorrosive coat of the pipeline and the digital signal processing module respectively
The pipe earth-current between the pipeline and the earth is detected, and the pipe earth-current is sent to the digital signal processing module；
Hall voltage sensor, it is connected, is used for the anticorrosive coat of the pipeline and the digital signal processing module respectively
The pipe ground voltage between the pipeline and the earth is detected, and the pipe ground voltage is sent to the digital signal processing module.
Optionally, the digital signal processing module specifically includes：D/A conversion unit, computing unit；
The D/A conversion unit, it is connected, uses with the Hall current sensor and the Hall voltage sensor respectively
In the pipe earth-current is converted into Nixie tube earth-current, the pipe ground voltage is converted into Nixie tube ground voltage；
The computing unit, it is connected respectively with the D/A conversion unit and the Pulse width modulation module, calculates institute
State the voltage difference of Nixie tube ground voltage and the reference voltage, the current differential of the Nixie tube earth-current and reference current,
And the voltage difference and the current differential are sent to the Pulse width modulation module.
Optionally, the Pulse width modulation module specifically includes：Pulse width modulation interrupt location, duty cycle adjustment list
Member；
The pulse width modulation interrupt location is connected with the digital signal processing module, in the pulse width modulation
Disconnected unit is used for according to the voltage difference and the current differential output pulse width modulated signal；
The duty cycle adjustment unit exports mould with the pulse width modulation interrupt location and the voltage of transformation respectively
Block connects, and the duty cycle adjustment unit is used for the dutycycle that impulse waveform is adjusted according to the pulse-width signal, is adjusted
Waveform processed, and the modulation waveform is sent to the voltage of transformation output module.
Optionally, the mode of operation of the anti-corrosive apparatus specifically includes：Constant current mode, constant voltage mode and forced-ventilated stream mode.
Optionally, the Pulse width modulation module is DSP28335 chips.
According to specific embodiment provided by the invention, the invention discloses following technique effect：The invention discloses one kind
Pipeline corrosion protection device, by the direct detection pipe ground voltage of detection module and pipe earth-current, described in digital signal processing module processing
Pipe ground voltage and the pipe earth-current, and respectively by the pipe ground voltage and the pipe earth-current and reference voltage and reference current
Difference is sought, the Pulse width modulation module modulates pulsewidth according to the difference, the conversion is accurately controlled by modulating pulsewidth
The output voltage of voltage output module, make the pipe ground voltage and the reference voltage equal, the pipe earth-current and the ginseng
It is equal to examine electric current, realizes under the influence of stray electrical current caused by D.C. high voltage transmission, good pipeline corrosion protection can be obtained
Effect.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of structure chart of pipeline corrosion protection device provided by the invention；
Fig. 2 is a kind of flow chart of the control output of pipeline corrosion protection device provided by the invention；
Fig. 3 is the flow chart that a kind of pulse width modulation of pipeline corrosion protection device provided by the invention controls；
Fig. 4 is a kind of physical circuit figure of pipeline corrosion protection device provided by the invention；
Fig. 5 is the calculation flow chart of reference voltage provided by the invention and reference current.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It is an object of the invention to provide a kind of pipe that antiseptic effect can be improved by the current potential between accurate control pipe ground
Road anti-corrosive apparatus.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
As shown in a kind of structure charts of pipeline corrosion protection device of Fig. 1, a kind of pipeline corrosion protection device, the anti-corrosive apparatus and pipeline
3 anticorrosive coat connection, the anti-corrosive apparatus specifically include：Voltage of transformation output module 1, detection module 2, pulse width modulation mould
Block 4, digital signal processing module 5, earthing pole 6；
The voltage of transformation output module 1 is connected with the anticorrosive coat of pipeline 3, and the earthing pole 6 is grounded, the voltage of transformation
Output module 1, the anticorrosive coat of the pipeline 3 and the earth form closed-loop path；
The detection module 2 is connected with the anticorrosive coat of the pipeline 3, and the detection module 2 is used to detect pipeline 3 and the earth
Between pipe ground voltage and pipe earth-current；
The digital signal processing module 5 is connected with the detection module 2, and the digital signal processing module 5 is provided with
Reference voltage and reference current, the digital signal processing module be used to calculating the pipe ground voltage and voltage difference, described
The current differential of pipe earth-current and the reference current；
The Pulse width modulation module 4 is connected with the digital signal processing module 5, the Pulse width modulation module
4 are used to modulate pulsewidth according to the voltage difference and the current differential, obtain modulated signal；
The voltage of transformation output module 1 is connected with the Pulse width modulation module 4, the voltage of transformation output module
1 be used for according to the modulated signal control voltage of transformation, make the pipe ground voltage and the reference voltage equal, the pipe it is electric
Stream is equal with the reference current.
A kind of flow chart of the control output of pipeline corrosion protection device as shown in Figure 2, the voltage of transformation output module 1 have
Body includes：
Single-phase transformer, when 380V alternating voltages are input to single-phase transformer, the single-phase transformer exports low voltage；
Schottky barrier diodes, it is connected with the individual event transformer, for the low voltage rectification to be obtained into rectification
Voltage；Fin is added, circuit is kept suitable temperature work；
Buck conversion circuit, it is connected respectively with the Schottky barrier diodes and the Pulse width modulation module 4,
For adjusting the commutating voltage according to the pulse-width signal, the voltage of transformation is obtained；The Buck conversion circuit
It is middle that fly-wheel diode is replaced by switch mosfet pipe, solve the phenomenon that electric current is big, heating is serious, complementary using two-way
PWM is controlled, and adds dead band, prevents short circuit.
Such as a kind of structure charts of pipeline corrosion protection device of Fig. 1, the detection module 2 specifically includes：
Hall current sensor 2-1, it is connected respectively with the anticorrosive coat and the digital signal processing module 5 of the pipeline 3,
Sent for detecting the pipe earth-current between the pipeline 3 and the earth, and by the pipe earth-current to the Digital Signal Processing
Module 5；
Hall voltage sensor 2-2, it is connected respectively with the anticorrosive coat and the digital signal processing module 5 of the pipeline 3,
Sent for detecting the pipe ground voltage between the pipeline 3 and the earth, and by the pipe ground voltage to the Digital Signal Processing
Module 5.
The digital signal processing module 5 specifically includes：D/A conversion unit, computing unit；
The D/A conversion unit, it is connected, uses with the Hall current sensor and the Hall voltage sensor respectively
In the pipe earth-current is converted into Nixie tube earth-current, the pipe ground voltage is converted into Nixie tube ground voltage；
The computing unit, it is connected respectively with the D/A conversion unit and the Pulse width modulation module, calculates institute
The current differential of the voltage difference of Nixie tube ground voltage and the reference voltage, the Nixie tube earth-current and reference current is stated,
And the voltage difference and the current differential are sent to the Pulse width modulation module.
As shown in Fig. 2 the Pulse width modulation module specifically includes：Pulse width modulation interrupt location, dutycycle are adjusted
Save unit；
The pulse width modulation interrupt location is connected with the digital signal processing module, in the pulse width modulation
Disconnected unit is used for according to the voltage difference and the current differential output pulse width modulated signal；
As shown in Figure 3 and Figure 4, the duty cycle adjustment unit respectively with the pulse width modulation interrupt location and described
Voltage of transformation output module connects, and the duty cycle adjustment unit is used to adjust impulse waveform according to the pulse-width signal
Dutycycle, modulation waveform is obtained, and the modulation waveform is sent to the voltage of transformation output module；
The pulse width modulation interrupt location judges whether the pipe ground voltage and the pipe earth-current are all higher than referring to
Value, if it is, the fiducial value in PWM waveform is reduced so that the PWM duty cycle of output reduces, and reduces the anti-corrosive apparatus
Output quantity so that the pipe ground voltage and the pipe earth-current are consistent with reference value；Otherwise, by PWM waveform
Fiducial value increases so that the increase of the PWM duty cycle of output, increases the output quantity of the anti-corrosive apparatus so that the pipe it is electric
Pressure and the pipe earth-current are consistent with reference value.
The mode of operation of the anti-corrosive apparatus specifically includes：Constant current mode, constant voltage mode and forced-ventilated stream mode.
The constant current mode remains unchanged for the pipe earth-current of the anti-corrosive apparatus with the reference value, the constant pressure
The pipe ground voltage and the reference value of anti-corrosive apparatus described in pattern remain unchanged；
The forced-ventilated stream mode uses mainly to be maintained not with the pipe ground voltage of the anti-corrosive apparatus and the reference value
Become, remained unchanged with the pipe earth-current and the reference value supplemented by, control conversion electricity is realized by the way of PWM double -loop controls
Press the output voltage of output module.
The Pulse width modulation module is DSP28335 chips.
Shown according to the I/O port of the DSP28335 chips and button operation, display portion utilize Serial Port Transmission number
According to, communicated using three GPIO mouths, control liquid crystal display 12864.Key part utilizes GIPO reading low and high level,
The state of button is read in, according to the different mode of operation of the condition selecting of button, logic is carried out inside DSP according to key-press status
Operation, so as to complete the function of display and button operation.
As shown in figure 5, the detailed process of the calculating of the reference voltage and reference current：
Calculate geomagnetic storm D.C. high voltage transmission caused induction field intensity, series impedance, shunt admittance on pipeline；Institute
The resistance that series impedance forms for the resistance of pipeline and the inductance of pipeline is stated, shunt admittance is pipeline coatings conductance and pipeline to big
The resistance of the electric capacity composition on ground；
Led according to the length of pipeline, the head end voltage of pipeline, the terminal voltage of pipeline, the series impedance, the parallel connection
Receive, the geomagnetic storm and D.C. high voltage transmission caused induction field Strength co-mputation geomagnetic induction current and ground magnetic strength on pipeline
Should pipe ground voltage；
The reference voltage and reference current are calculated according to the geomagnetic induction current and the earth induction pipe ground voltage,
Realize in the distance range of the length of the pipeline, pipeline cathode protection meets current potential criterion.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help the method and its core concept for understanding the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, in specific embodiments and applications there will be changes.In summary, this specification content is not
It is interpreted as limitation of the present invention.
Claims (7)
1. a kind of pipeline corrosion protection device, it is characterised in that the anticorrosive coat connection of the anti-corrosive apparatus and pipeline, the anti-corrosive apparatus
Specifically include：Pulse width modulation module, voltage of transformation output module, digital signal processing module, detection module, earthing pole；
The anticorrosive coat connection of the voltage of transformation output module and pipeline, the earthing pole ground connection, the voltage of transformation export mould
Block, the anticorrosive coat of the pipeline and the earth form closed-loop path；
The detection module is connected with the anticorrosive coat of the pipeline, and the detection module is used to detect the pipe between pipeline and the earth
Ground voltage and pipe earth-current；
The digital signal processing module is connected with the detection module, and the digital signal processing module is provided with reference voltage
And reference current, the digital signal processing module be used for calculate the pipe ground voltage and voltage difference, the pipe earth-current
With the current differential of the reference current；
The Pulse width modulation module is connected with the digital signal processing module, and the Pulse width modulation module is used for root
According to the voltage difference and current differential modulation pulsewidth, modulated signal is obtained；
The voltage of transformation output module is connected with the Pulse width modulation module, and the voltage of transformation output module is used for root
Voltage of transformation is controlled according to the modulated signal, makes the pipe ground voltage and the reference voltage equal, the pipe earth-current and institute
It is equal to state reference current.
2. a kind of pipeline corrosion protection device according to claim 1, it is characterised in that the voltage of transformation output module is specific
Including：
Single-phase transformer；When 380V alternating voltages are input to the single-phase transformer, the single-phase transformer exports low voltage；
Schottky barrier diodes, it is connected with the individual event transformer, for the low voltage rectification to be obtained into commutating voltage；
Buck conversion circuit, it is connected, is used for the Schottky barrier diodes and the Pulse width modulation module respectively
The commutating voltage is adjusted according to the pulse-width signal, obtains the voltage of transformation.
3. a kind of pipeline corrosion protection device according to claim 1, it is characterised in that the detection module specifically includes：
Hall current sensor, it is connected respectively with the anticorrosive coat of the pipeline and the digital signal processing module, for detecting
Pipe earth-current between the pipeline and the earth, and the pipe earth-current is sent to the digital signal processing module；
Hall voltage sensor, it is connected respectively with the anticorrosive coat of the pipeline and the digital signal processing module, for detecting
Pipe ground voltage between the pipeline and the earth, and the pipe ground voltage is sent to the digital signal processing module.
4. a kind of pipeline corrosion protection device according to claim 3, it is characterised in that the digital signal processing module is specific
Including：D/A conversion unit, computing unit；
The D/A conversion unit, it is connected respectively with the Hall current sensor and the Hall voltage sensor, for inciting somebody to action
The pipe earth-current is converted to Nixie tube earth-current, and the pipe ground voltage is converted into Nixie tube ground voltage；
The computing unit, it is connected respectively with the D/A conversion unit and the Pulse width modulation module, calculates the number
The current differential of the voltage difference of word pipe ground voltage and the reference voltage, the Nixie tube earth-current and reference current, and will
The voltage difference and the current differential are sent to the Pulse width modulation module.
5. a kind of pipeline corrosion protection device according to claim 1, it is characterised in that the Pulse width modulation module is specific
Including：Pulse width modulation interrupt location, duty cycle adjustment unit；
The pulse width modulation interrupt location is connected with the digital signal processing module, and the pulse width modulation is interrupted single
Member is used for according to the voltage difference and the current differential output pulse width modulated signal；
The duty cycle adjustment unit connects with the pulse width modulation interrupt location and the voltage of transformation output module respectively
Connect, the duty cycle adjustment unit is used for the dutycycle that impulse waveform is adjusted according to the pulse-width signal, obtains modulating wave
Shape, and the modulation waveform is sent to the voltage of transformation output module.
A kind of 6. pipeline corrosion protection device according to claim 1, it is characterised in that the mode of operation tool of the anti-corrosive apparatus
Body includes：Constant current mode, constant voltage mode and forced-ventilated stream mode.
7. a kind of pipeline corrosion protection device according to claim 1, it is characterised in that the Pulse width modulation module is
DSP28335 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711284302.6A CN107815690B (en) | 2017-12-07 | 2017-12-07 | Pipeline anti-corrosion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711284302.6A CN107815690B (en) | 2017-12-07 | 2017-12-07 | Pipeline anti-corrosion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107815690A true CN107815690A (en) | 2018-03-20 |
| CN107815690B CN107815690B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711284302.6A Active CN107815690B (en) | 2017-12-07 | 2017-12-07 | Pipeline anti-corrosion device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114686891A (en) * | 2022-04-26 | 2022-07-01 | 湖南大学 | Oil-gas pipeline stray current treatment method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990078517A (en) * | 1998-12-22 | 1999-11-05 | 정해룡 | Electric Control Device_ |
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| CN114686891B (en) * | 2022-04-26 | 2022-12-02 | 湖南大学 | Oil-gas pipeline stray current treatment method and system |
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| CN107815690B (en) | 2024-02-02 |
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