CN218666294U - DC interference mitigation system combining sectional insulation and drainage - Google Patents
DC interference mitigation system combining sectional insulation and drainage Download PDFInfo
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- CN218666294U CN218666294U CN202223243820.2U CN202223243820U CN218666294U CN 218666294 U CN218666294 U CN 218666294U CN 202223243820 U CN202223243820 U CN 202223243820U CN 218666294 U CN218666294 U CN 218666294U
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Abstract
A DC interference mitigation system combining sectional insulation and drainage comprises a controller, a first electric control switch, a second electric control switch, a third electric control switch, a fourth electric control switch, an adjustable resistor, a first potential sensor, a second potential sensor, a first drainage ground bed and a second drainage ground bed; the upstream pipeline and the downstream pipeline are connected in a bridging way through a first electric control switch; the second electric control switch is connected in series with the adjustable resistor and then connected in parallel with the first electric control switch; the controller is connected with the first electric control switch, the second electric control switch, the third electric control switch, the fourth electric control switch and the adjustable resistor in a control mode. The embodiment of the utility model provides a first time is disconnected the cross-over connection of upstream and downstream pipeline when taking place to disturb, and the cross-over connection resistance between upstream and downstream pipeline reduces the potential difference between the upstream and downstream pipeline, still has the switch-on ground bed to drain under the unusual condition of potential behind the cross-over connection resistance, guarantees that the cloudy antiseptic condition of insulating joint both sides pipeline is good.
Description
Technical Field
The utility model belongs to the technical field of cathodic protection is anticorrosive, especially, relate to a direct current that sectional insulation and drainage combined together disturbs mitigation system.
Background
The inhibition of the corrosion of the pipeline caused by the interference of the stray current is an important work for the corrosion prevention of the pipeline, and when the interference of the direct-current stray current is responded, a drainage or sectional insulation treatment method is generally adopted. The drainage processing mode can achieve a better effect on light direct current interference by arranging drainage points in the interference section. The sectional insulation processing mode is characterized in that an insulating joint is arranged on the pipeline, so that the pipeline of the interference section and the pipeline of the non-interference section are insulated in a sectional mode, and the influence range of interference can be controlled.
For the direct current interference with strong intensity, drainage or sectional insulation is singly adopted, the effect is not ideal, the direct current interference with strong intensity can generate large potential difference at two ends when the two ends of the insulated joint are disconnected, drainage ground beds need to be arranged on the two sides of the insulated joint in a matched mode, and the drainage ground beds on one side or the two sides are connected according to the situation of the potential of the two sides after disconnection, so that the influence caused by the large potential difference is relieved.
At present, the operation of disconnecting a jumper cable and accessing a drainage ground bed needs manual work to a site, in practical engineering application, for irregular fluctuation or random direct current interference, personnel cannot arrive at the site immediately due to uncertain interference time, the jumper cable of an insulated joint is disconnected in time, sectional insulation is realized, potentials on two sides after disconnection cannot be measured in time, and therefore the drainage ground bed is connected correctly. In addition, for strong interference or interference with large fluctuation, the sectional insulation of the jumper cable is simply disconnected, and even if drainage is accessed to a drainage ground bed, the potential and the potential difference at two ends cannot reach the potential range acceptable for the cathodic protection and corrosion prevention of the pipeline because other adjusting means are not available.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists among the correlation technique, the utility model provides a direct current that sectional insulation and drainage combined together disturbs mitigation system to solve current pipeline direct current and disturb the handling mode and need artifical site operation, can't in time carry out correct connection, the adjustment means is single and can't reach the problem of cloudy guarantor potential range.
The utility model provides a direct current interference mitigation system combining sectional insulation and drainage, which is used for eliminating the influence of direct current interference on a pipeline, wherein the pipeline comprises an upstream pipeline and a downstream pipeline, and an insulation joint is arranged between the upstream pipeline and the downstream pipeline;
the direct-current interference mitigation system combining the sectional insulation and the drainage comprises a controller, a first electric control switch, a second electric control switch, a third electric control switch, a fourth electric control switch, an adjustable resistor, a first potential sensor, a second potential sensor, a first drainage ground bed and a second drainage ground bed;
the upstream pipeline and the downstream pipeline are connected in a bridging way through a first electric control switch;
the second electric control switch is connected in series with the adjustable resistor and then connected in parallel with the first electric control switch;
the first drainage ground bed is buried at one side of the upstream pipeline and is electrically connected with the upstream pipeline through a third electric control switch;
the second drainage ground bed is buried at one side of the downstream pipeline and is electrically connected with the downstream pipeline through a fourth electric control switch;
the first potential sensor and the second potential sensor are electrically connected with the controller and are respectively embedded at one side of the upstream pipeline and one side of the downstream pipeline;
the controller is electrically connected with the upstream pipeline and the downstream pipeline respectively through a first zero position cable and a second zero position cable;
the controller is connected with the first electric control switch, the second electric control switch, the third electric control switch, the fourth electric control switch and the adjustable resistor in a control mode.
In some embodiments, the first electrically controlled switch is a normally closed relay, and the second electrically controlled switch, the third electrically controlled switch and the fourth electrically controlled switch are normally open relays.
In some of these embodiments, the controller has a communication module.
In some of these embodiments, the minimum resistance of the adjustable resistor is greater than 0 Ω.
In some of these embodiments, the minimum resistance value of the adjustable resistor is equal to 0 Ω.
In some of these embodiments, the maximum resistance of the adjustable resistor is less than or equal to 1M Ω.
Based on the technical scheme, the embodiment of the utility model provides an in through controller monitoring upper and lower stream outage potential state, make the host computer can long-range the very first time learn the unusual of upper and lower stream outage potential, thereby timely control four electrical control switch, the first time break cross-over connection of upper and lower reaches pipeline when taking place the interference, cross-over resistance between upper and lower reaches pipeline, reduce potential difference between the upper and lower reaches pipeline, still there is the potential behind cross-over resistance under the unusual circumstances of potential to put through the ground bed and carry out the drainage, and still there is the potential to reduce cross-over resistance value under the unexpected circumstances behind the current of put through the ground bed drainage, guarantee that the cloudy of insulating joint both sides pipeline protects antiseptic condition well, it needs artifical field operation to have solved current pipeline direct current interference processing mode, can't in time carry out correct connection, the adjustment means is single and can't reach the problem that cloudy potential is up to standard.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a schematic structural diagram of a dc interference mitigation system combining sectionalized insulation and drainage according to the present invention;
in the figure:
1. a controller; 11. a communication module;
21. a first electrically controlled switch; 22. a second electrically controlled switch; 23. a third electrically controlled switch; 24. a fourth electric control switch;
3. an adjustable resistor;
41. a first potential sensor; 42. a first potential sensor;
51. a first drainage bed; 52. a first drainage bed;
61. an upstream conduit; 62. a downstream conduit;
7. and (4) insulating the joint.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some, not all embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, in an exemplary embodiment of the dc interference mitigation system combining the sectional insulation with the drainage, the dc interference mitigation system combining the sectional insulation with the drainage includes a controller 1, a first electronic control switch 21, a second electronic control switch 22, a third electronic control switch 23, a fourth electronic control switch 24, an adjustable resistor 3, a first potential sensor 41, a second potential sensor 42, a first drainage ground bed 51, and a second drainage ground bed 52.
The pipelines comprise an upstream pipeline 61 and a downstream pipeline 62, and the upstream pipeline 61 and the downstream pipeline 62 are connected through an insulating joint 7. The upstream pipe 61 and the downstream pipe 62 are connected across by the first electronic control switch 21, and the second electronic control switch 22 is connected in series with the adjustable resistor 3 and then connected in parallel with the first electronic control switch 21. The first drainage bed 51 is buried at one side of the upstream pipe 61 and is electrically connected to the upstream pipe 61 through the third electrically controlled switch 23. The second drainage bed 52 is buried on one side of the downstream pipe 62 and is electrically connected to the downstream pipe 62 by the fourth electrically controlled switch 24. The first electric potential sensor 41 and the second electric potential sensor 42 are electrically connected to the controller 1 and buried at one side of the upstream pipe 61 and one side of the downstream pipe 62, respectively. The controller 1 is electrically connected with the upstream pipeline 61 and the downstream pipeline 62 through a first zero-position cable and a second zero-position cable respectively, and the controller 1 is connected with the first electric control switch 21, the second electric control switch 22, the third electric control switch 23, the fourth electric control switch 24 and the adjustable resistor 3 in a control mode.
The controller 1 is a control terminal for implementing system actions, and is used for receiving a control instruction sent by an upper computer or uploading collected data to the upper computer, and the upper computer sends the control instruction under manual control. The controller 1 monitors the power-off potential of the upstream pipeline 61 and the power-off potential of the downstream pipeline 62 through the first potential sensor 41 and the first zero position cable, and the second potential sensor 42 and the second zero position cable, respectively, and uploads the power-off potentials to the upper computer. When monitoring that the power-off potentials of the upstream and downstream pipelines are in an underprotection state or an over-protection state at the same time through the upper computer, an operator sends a control instruction to enable the controller 1 to control the first electric control switch 21 to be switched off, so that the bridging of the upstream pipeline 61 and the downstream pipeline 62 is disconnected, after the first electric control switch 21 is switched off, if the power-off potentials of the upstream and downstream pipelines do not reach the standard, the operator sends the control instruction to the controller 1 through the upper computer, and the controller 1 closes the second electric control switch 22, so that the adjustable resistor 3 which is adjusted to the maximum resistance value in advance is bridged between the upstream and downstream pipelines. After the adjustable resistor 3 is bridged, if an operator monitors that the power-off potential of the upstream pipeline or the downstream pipeline does not reach the standard through an upper computer, a control instruction is sent out, so that the controller 1 controls the third electric control switch 23 or the fourth electric control switch 24 to be switched on, and therefore the upstream pipeline 61 or the downstream pipeline 62 is drained through the first drainage ground bed 51 or the second drainage ground bed 52. If the power-off potentials of the upstream pipeline and the downstream pipeline do not reach the standard or reach the expected target, an operator sends a control instruction to the controller 1 through the upper computer, so that the controller 1 controls the adjustable resistor 3 to gradually reduce the resistance value until the power-off potentials of the upstream pipeline and the downstream pipeline reach the standard or reach the expected target.
The power-off potential reaches the standard, namely the power-off potential is within the standard potential range of cathodic protection, the under-protection state is the power-off potential of the pipeline is within the standard potential range, and the over-protection state is the power-off potential of the pipeline is minus the standard potential range. The prior art is not the invention point of the application, and how to select the connection or disconnection of the electric connection of the pipelines at two ends of the insulating joint and select the drainage ground bed to drain the pipelines according to the outage potentials of the upstream and downstream pipelines. The expected target is set manually, the power-off potential of at least one side of the insulated joint reaches the standard, and the insulated joint belongs to the prior art and is not the invention point of the application.
In the exemplary embodiment, the dc interference mitigation system combining the sectional insulation and the drainage enables an operator to know the abnormality of the power-off potentials of the upstream and downstream pipelines at the first time through an upper computer, so that the first electric control switch is triggered to be switched off through the controller in time, and thus, when the dc interference occurs, the cross-over connection between the upstream and downstream pipelines is switched off at the first time to perform the sectional control; under the condition that the power-off potentials of the upstream and downstream pipelines are still abnormal after the first electric control switch is disconnected, the second electric control switch can be closed in time through the controller, so that the adjustable resistor is bridged between the upstream and downstream pipelines, the increase of the pipeline bridge resistance is realized, the potential difference between the upstream and downstream pipelines is reduced, and the power-off potentials of the upstream and downstream pipelines reach the standard; if the outage potential does not reach the standard after the resistor is bridged, the third electric control switch or the fourth electric control switch can be controlled by the controller in time, so that drainage can be accurately carried out through the first drainage ground bed or the second drainage ground bed, the outage potential of the upstream and downstream pipelines is guaranteed to reach the standard, and the cathode protection effect of the upstream and downstream pipelines is guaranteed to be good; if the power-off potential after drainage still does not reach the standard, the resistance value of the adjustable resistor is gradually reduced through the controller in time until the upstream and downstream power-off potentials reach the standard or reach the expected target, so that the increase of the pipeline bridging resistance is realized more smoothly, the upstream and downstream pipeline power-off potentials reach the standard to the greatest extent, finally, an operator is enabled to rapidly perform bridging disconnection and bridging resistance when direct current interference occurs, and a ground bed is correctly selected for drainage, and the problems that manual field operation is needed in the current pipeline direct current interference processing mode, correct connection cannot be performed in time, the adjusting means is single, and the cathode-protection potential range cannot be reached are solved.
In order to ensure that the adjustable resistor can be adjusted, before the second electronic control switch is closed, the adjustable resistor is in a state of the maximum resistance value, so that when the second electronic control switch is closed, impact caused by impedance change between an upstream pipeline and a downstream pipeline is reduced, and the controller can adjust the resistance value of the adjustable resistor to be lower from the maximum resistance value.
In some embodiments, the first electronic control switch 21 is a normally closed relay, and the second electronic control switch 22, the third electronic control switch 23 and the fourth electronic control switch 24 are normally open relays, so that when the four electronic control switches are lost due to failure of the controller 1, the first electronic control switch 21 keeps a closed state, the second electronic control switch 22, the third electronic control switch 23 and the fourth electronic control switch 24 keep an open state, an initial state of cross-over of upstream and downstream pipelines is maintained, unnecessary drainage of the pipelines is prevented, the potentials of the upstream and downstream pipelines are consistent and reach the standard, and normal operation of a cathode protection system of the pipelines is ensured.
In some embodiments, the controller 1 has a communication module 11, the communication module 11 is in communication connection with an upper computer through a wired communication or wireless communication mode, so that the upper computer can manually control the controller 1, and the controller 1 can upload the working state, the state of the electric control switch, the resistance value information of the adjustable resistor and the monitored potential information to the upper computer, so that a remote maintenance worker can master the operating state of the system more timely and comprehensively, and can send out corresponding control instructions timely.
In some embodiments, the minimum resistance value of the adjustable resistor 3 is greater than 0 Ω, so as to avoid the resistance value of the adjustable resistor 3 from decreasing to 0 Ω, thereby preventing the upstream and downstream pipes from being bridged by the adjustable resistor 3, and ensuring that the upstream and downstream pipes are controlled in a segmented manner when interference occurs.
In some embodiments, the minimum resistance value of the adjustable resistor 3 is equal to 0 Ω, so that when the adjustable resistor 3 is adjusted to the minimum resistance value, the upstream and downstream pipelines can form a cross-over connection through the adjustable resistor 3 without closing the first electronic control switch, thereby reducing switching actions and increasing flexibility of system adjustment.
In some embodiments, the maximum resistance value of the adjustable resistor 3 is less than or equal to 1M Ω, so that the initial resistance value of the adjustable resistor 3 is preset to the maximum resistance value, when the second electronic control switch 22 is closed, impact caused by impedance change between the upstream and downstream pipelines is reduced, the adjustable resistor 3 is gradually reduced from the maximum resistance value, the function of the adjustable resistor 3 can be exerted to the greatest extent, the power-off potential of the upstream and downstream pipelines can be adjusted to reach the standard range or reach the expected target, and the cathode protection and corrosion prevention state of the upstream and downstream pipelines on two sides of the insulating joint is good.
Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the technical solution of the present invention, the present invention should be covered by the technical solution of the present invention.
Claims (6)
1. A DC interference mitigation system combining sectional insulation and drainage is used for eliminating the influence of DC interference on a pipeline, wherein the pipeline comprises an upstream pipeline and a downstream pipeline, and an insulation joint is arranged between the upstream pipeline and the downstream pipeline;
the device is characterized by comprising a controller, a first electric control switch, a second electric control switch, a third electric control switch, a fourth electric control switch, an adjustable resistor, a first potential sensor, a second potential sensor, a first drainage ground bed and a second drainage ground bed;
the upstream pipeline and the downstream pipeline are connected in a cross-over mode through the first electronic control switch;
the second electric control switch is connected with the adjustable resistor in series and then connected with the first electric control switch in parallel;
the first drainage ground bed is buried at one side of the upstream pipeline and is electrically connected with the upstream pipeline through a third electric control switch;
the second drainage ground bed is buried at one side of the downstream pipeline and is electrically connected with the downstream pipeline through a fourth electric control switch;
the first potential sensor and the second potential sensor are electrically connected with the controller and respectively embedded at one side of the upstream pipeline and one side of the downstream pipeline;
the controller is electrically connected with the upstream pipeline and the downstream pipeline respectively through a first zero position cable and a second zero position cable;
the controller is connected with the first electric control switch, the second electric control switch, the third electric control switch, the fourth electric control switch and the adjustable resistor in a control mode.
2. The combined sectionalized insulation and drainage dc interference mitigation system of claim 1, wherein the first electrically controlled switch is a normally closed relay, and the second, third and fourth electrically controlled switches are normally open relays.
3. The combined segment isolation and drainage dc interference mitigation system of claim 1, wherein the controller has a communication module.
4. The combined segment isolation and drainage dc interference mitigation system of claim 1, wherein the minimum resistance of the adjustable resistor is greater than 0 Ω.
5. The combined sectionalized insulation and drainage dc interference mitigation system of claim 1, wherein the minimum resistance value of the adjustable resistor is equal to 0 Ω.
6. The combined section isolation and drainage DC interference mitigation system according to claim 4 or 5, wherein the maximum resistance value of the adjustable resistor is 1M Ω or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223243820.2U CN218666294U (en) | 2022-12-05 | 2022-12-05 | DC interference mitigation system combining sectional insulation and drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223243820.2U CN218666294U (en) | 2022-12-05 | 2022-12-05 | DC interference mitigation system combining sectional insulation and drainage |
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| Publication Number | Publication Date |
|---|---|
| CN218666294U true CN218666294U (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223243820.2U Active CN218666294U (en) | 2022-12-05 | 2022-12-05 | DC interference mitigation system combining sectional insulation and drainage |
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| CN (1) | CN218666294U (en) |
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2022
- 2022-12-05 CN CN202223243820.2U patent/CN218666294U/en active Active
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