CN117329461A - Oil pipeline leak detection system and method - Google Patents
Oil pipeline leak detection system and method Download PDFInfo
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- CN117329461A CN117329461A CN202311292295.XA CN202311292295A CN117329461A CN 117329461 A CN117329461 A CN 117329461A CN 202311292295 A CN202311292295 A CN 202311292295A CN 117329461 A CN117329461 A CN 117329461A
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 143
- 239000003208 petroleum Substances 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 34
- 229910002804 graphite Inorganic materials 0.000 claims description 34
- 239000010439 graphite Substances 0.000 claims description 34
- 230000008859 change Effects 0.000 claims description 27
- 238000010291 electrical method Methods 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Pipeline Systems (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to the technical field of leakage detection, and relates to an oil pipeline leakage detection system and method, comprising a detection component for monitoring resistivity signals, flow signals of petroleum and pressure signals in real time, wherein an early warning and monitoring server receives the resistivity signals, the flow signals and the pressure signals and converts the resistivity signals, the flow signals and the pressure signals into corresponding resistivity values, flow values and pressure values, the pressure difference value is obtained by carrying out difference on two pressure values on adjacent second monitoring points obtained at the same moment, the pressure difference value is compared with the pressure difference value obtained at the previous moment to obtain a pressure variation, when the pressure variation is larger than a preset pressure variation threshold value and the flow variation on the section is larger than the preset flow variation threshold value, the section is judged to be a leakage section, and the position of the leakage section, which is the position of the leakage point, corresponding to the first monitoring point with the first resistivity value, is screened on the leakage section. The invention can quickly and accurately determine the leakage position and reduce the environmental negative effect caused by oil pipeline leakage to the minimum.
Description
Technical Field
The invention belongs to the technical field of leakage detection, and particularly relates to an oil pipeline leakage detection system and method.
Background
Petroleum, a non-renewable resource, is increasingly taking up important places in people's lives. At present, petroleum pipeline transportation is a main petroleum transportation mode, however, once leakage occurs in the petroleum pipeline, the petroleum pipeline brings about a very adverse effect on the development of economy.
Researchers have found that failure of the pipeline material is the most significant direct cause of the petroleum pipeline leakage through analysis of the leakage event and the leakage cause of the petroleum pipeline. To find effective measures for preventing the leakage of the pipeline, the research on the failure mechanism of the pipeline material must be enlarged. Many years of research results prove that the leakage caused by material failure is mainly caused by corrosion, crack, abrasion and the like of a conveying pipeline. If pores, slag inclusion or lack of welding are thoroughly formed in the welding line of the steel pipe, leakage of the pipeline is caused, and if a cast iron pipe is cracked or the pipeline is abraded and damaged, the strength of the oil pipeline is reduced, so that oil leakage is unavoidable along with the time. In addition, under the action of high temperature and high pressure, the phenomenon that the medium corrosive in the petroleum transmission pipeline causes pipeline leakage is also very common.
Many scholars are also always working on accurately monitoring the leakage point, and the leakage point detection method applied at present can only play a role under the condition of large-flow leakage, but has lower positioning accuracy, and is not used for detecting and positioning small-flow leakage at all, so that the environment negative effect is large.
Disclosure of Invention
In view of the above, the invention provides an oil pipeline leakage detection system and method, which can be applied to full-range leakage point monitoring, can quickly and accurately determine the leakage position, and can reduce the environmental negative effect caused by oil pipeline leakage to the minimum.
The technical scheme of the invention is as follows:
an oil conduit leak detection system comprising:
the first detection assembly is used for monitoring resistivity signals of a plurality of first monitoring points in real time, and the plurality of first monitoring points are positioned on one side of the oil pipeline and are arranged along the length direction of the oil pipeline;
the second detection assembly is used for monitoring flow signals and pressure signals of petroleum on a plurality of second monitoring points in real time, and the plurality of second monitoring points are positioned in the oil pipeline and are arranged along the length direction of the oil pipeline;
the early warning and monitoring server is used for receiving the resistivity signal, the flow signal and the pressure signal, converting the resistivity signal, the flow signal and the pressure signal into corresponding resistivity values, flow values and pressure values, obtaining pressure difference values by differentiating two pressure values on adjacent second monitoring points obtained at the same moment, comparing the pressure difference values with the pressure difference values obtained at the previous moment to obtain pressure change amounts, and judging the leakage section when the pressure change amounts are larger than a preset pressure change threshold value and the flow change amounts on the section are larger than the preset flow change threshold value, wherein the early warning and monitoring server is also used for screening a plurality of resistivity values on the leakage section to obtain first monitoring points corresponding to the first resistivity values with the sudden increase of the resistivity values and judging the leakage point positions.
Preferably, the first detecting assembly includes:
the high-density graphite monitoring system comprises a plurality of high-density graphite electrodes, wherein one ends of the high-density graphite electrodes are buried at the first monitoring points, the other ends of the high-density graphite electrodes are electrically connected with a high-density electrical method host, and the high-density electrical method host is connected with the early warning and monitoring server.
Preferably, the distance between the end part of the high-density graphite electrode buried at the first monitoring point and the oil pipeline to be detected is 45-50cm.
Preferably, the distance between two adjacent high density graphite electrodes is 1.8-2.2 meters.
Preferably, the second detecting assembly includes:
and the pressure and flow sensors are connected with the early warning and monitoring server.
Preferably, the system further comprises a data transceiver module, wherein the data transceiver module is connected with the high-density electrical method host, the pressure and flow sensor and the early warning and monitoring server, and is used for receiving the resistivity signal, the flow signal and the pressure signal and forwarding the resistivity signal, the flow signal and the pressure signal to the early warning and monitoring server in a wireless transmission mode.
Preferably, the method further comprises:
the central control terminal is connected with the early warning and monitoring server and is used for receiving the position of the leakage point and generating prompt information for informing relevant maintenance personnel to reach the pipeline leakage position for maintenance;
the portable mobile terminal is respectively connected with the central control terminal and the early warning and monitoring server and is used for receiving the position of the leakage point and the prompt information.
The oil pipeline leakage detection method adopts the oil pipeline leakage detection system, and comprises the following steps:
selecting a plurality of first monitoring points on the lower side of an oil pipeline to be detected, arranging a high-density graphite electrode on each first monitoring point, and monitoring resistivity signals of the plurality of first monitoring points in real time and transmitting the resistivity signals to the data receiving and transmitting assembly;
selecting a plurality of second monitoring points in an oil pipeline to be detected, setting a pressure and flow sensor on each second monitoring point, and real-time monitoring flow signals and pressure signals of petroleum on the plurality of second monitoring points and transmitting the flow signals and the pressure signals to the data receiving and transmitting assembly;
the data receiving and transmitting assembly receives the resistivity signal, the flow signal and the pressure signal and synchronously forwards the resistivity signal, the flow signal and the pressure signal to the early warning and monitoring server;
the early warning and monitoring server receives the resistivity signal, the flow signal and the pressure signal, converts the resistivity signal, the flow signal and the pressure signal into corresponding resistivity values, flow values and pressure values, then obtains a pressure difference value by differentiating two pressure values on adjacent second monitoring points obtained at the same moment, compares the pressure difference value with the pressure difference value obtained at the previous moment to obtain a pressure variation, and judges that the section is a leakage section when the pressure variation is larger than a preset pressure variation threshold value and the flow variation on the section is larger than the preset flow variation threshold value, and the early warning and monitoring server is also used for screening a plurality of resistivity values on the leakage section to obtain a first monitoring point corresponding to a first resistivity value with the sudden increase of the resistivity value and judging that the section is the position of the leakage point;
the early warning and monitoring server synchronously sends the position of the leakage point to the central control terminal and the portable mobile terminal, and the central control terminal generates prompt information to send to the portable mobile terminal after receiving the position of the leakage point so as to inform relevant maintenance personnel to reach the pipeline leakage position for maintenance.
According to the oil pipeline leakage detection method based on the wireless telemetry method, the first detection assembly is used for monitoring resistivity information of different underground positions in real time, the second detection assembly is used for monitoring flow signals and pressure signals of petroleum at a plurality of second monitoring points in real time, and the data transceiver assembly is used for receiving the resistivity signals, the flow signals and the pressure signals and synchronously forwarding the resistivity signals, the flow signals and the pressure signals to the early warning and monitoring server; the early warning and monitoring server receives the resistivity signal, the flow signal and the pressure signal, converts the resistivity signal, the flow signal and the pressure signal into corresponding resistivity values, flow values and pressure values, then, makes difference between two pressure values on adjacent second monitoring points obtained at the same moment to obtain a pressure difference value, compares the pressure difference value with the pressure difference value obtained at the previous moment to obtain a pressure variation, and when the pressure variation is larger than a preset pressure variation threshold value and the flow variation on the section is larger than the preset flow variation threshold value, the section is judged to be a leakage section, the early warning and monitoring server also screens a plurality of the resistivity values on the leakage section to obtain a first monitoring point corresponding to the first resistivity value with the sudden increase of the resistivity values, after judging that the first monitoring point is the position of the leakage point, synchronously sends the position of the leakage point to the central control terminal and the portable mobile terminal, and after receiving the position of the leakage point, generates prompt information and sends the prompt information to the portable mobile terminal so as to inform relevant maintenance personnel to arrive at the position of the pipeline for maintenance.
Compared with the prior art, the invention utilizes the principle of multi-parameter detection, utilizes the pressure and flow sensor to monitor the flow of petroleum in a pipeline and the pressure difference of the adjacent sensors to carry out sensitive feedback on tiny leakage, can approximately determine the range of leakage points, can accurately monitor the change of resistivity caused by petroleum leaked by the leakage points by using a high-density electrical method, and compares the change of resistivity in different time periods and combines the data of the pressure and the flow sensor to judge the specific position of leakage. The invention combines a plurality of monitoring methods and positioning technologies, can accurately judge the position of the leakage point, is particularly effective for detecting and positioning small-flow leakage, has rapid detection and positioning, can reduce the environmental negative effect caused by the leakage of the oil pipeline to the minimum, can realize the monitoring functions of detection, transmission, control and early warning comprehensive systems, can also utilize wireless transmission to accurately monitor in real time, realize the full-coverage monitoring of the leakage of the oil pipeline, has strong practicability and is worthy of popularization.
Drawings
FIG. 1 is a schematic overall structure of embodiment 1 of the present invention;
FIG. 2 is a schematic overall structure of embodiment 2 of the present invention;
FIG. 3 is a schematic overall structure of embodiment 3 of the present invention;
fig. 4 is a flow chart of the system of the present invention.
Reference numerals:
the system comprises a 1-oil pipeline, a 2-high density graphite electrode, a 3-high density electrical method host, a 4-data transceiver component, a 5-pressure and flow sensor, a 6-early warning and monitoring server, a 7-central control terminal and an 8-portable mobile terminal.
Detailed Description
The present invention provides an oil conduit leak detection system and method, and is described below with reference to the schematic diagrams of fig. 1-4.
Example 1
As shown in fig. 1, the oil pipeline leakage detection system provided by the invention utilizes the pressure and flow sensor 5 to monitor the flow of oil in the pipeline and the pressure difference of adjacent sensors to carry out sensitive feedback on tiny leakage, can approximately determine the range of leakage points, and utilizes a high-density electrical method to accurately monitor the change of resistivity caused by the oil leaked by the leakage points.
Specifically, the oil pipeline leakage detection system comprises a first detection component for monitoring resistivity signals of a plurality of first monitoring points in real time, wherein the plurality of first monitoring points are located on one side of the oil pipeline 1 and are arranged along the length direction of the oil pipeline 1. The system further comprises a second detection assembly for monitoring flow signals and pressure signals of the oil at a plurality of second monitoring points in real time, wherein the plurality of second monitoring points are located inside the oil pipeline 1 and are arranged along the length direction of the oil pipeline 1. The early warning and monitoring server 6 is used for receiving the resistivity signal, the flow signal and the pressure signal, converting the resistivity signal, the flow signal and the pressure signal into corresponding resistivity values, flow values and pressure values, obtaining pressure difference values by differentiating two pressure values on adjacent second monitoring points obtained at the same moment, comparing the pressure difference values with the pressure difference values obtained at the previous moment to obtain pressure variation, and judging that the section is a leakage section when the pressure variation is larger than a preset pressure variation threshold value and the flow variation on the section is larger than the preset flow variation threshold value, wherein the early warning and monitoring server 6 is also used for screening a plurality of resistivity values on the leakage section to obtain a first monitoring point corresponding to a first resistivity value with sudden increase of the resistivity value and judging that the section is the position of the leakage point.
Specifically, the first detection component comprises a plurality of high-density graphite electrodes 2, the high-density graphite electrodes 2 are used for monitoring the change of resistivity caused by petroleum leaked from a leakage point, one end of each high-density graphite electrode 2 is buried at a first monitoring point, the other end of each high-density graphite electrode 2 is electrically connected with a high-density electrical method host computer 3, and the high-density electrical method host computer 3 is connected with an early warning and monitoring server 6.
The high-density graphite electrode 2 exists as an important element for detecting by a high-density electrical method, the measuring line of the high-density graphite electrode 2 is arranged right below the oil pipeline 1 and buried 45-50cm below the ground surface, preferably 50cm; the high-density graphite electrode 2 is designed to have a pole distance of 1.8-2.2 meters, preferably 2 meters, and is used as an observation unit according to 2 km, and a high-density electric method host machine 3 is installed. The oil pipeline 1 has shallow burial depth, the detection depth is set to be not more than 10 meters when the high-density electric method is used for detection, and the temperature measuring is one of a plurality of measuring modes of the high-density electric method host computer 3, and has the characteristics of shallow measurement depth and high accuracy, so that the temperature measuring device is adopted.
The high-density electrical method detects the resistivity change on the section of the medium, can reflect the lithology change of the medium, and judges the lithology change of the medium by measuring the medium resistance after electrifying the lithology, and when oil pipe leakage occurs, petroleum can cause the medium resistivity to change, so the method can accurately position oil pipeline leakage according to the change of the medium resistivity. Once the oil pipeline leaks, the resistivity on the section of the leakage area is inevitably changed, the resistivity of the leakage area is continuously collected, the abnormal medium resistivity is subtracted from the abnormal medium resistivity by comparing the difference between the surrounding medium resistivity and the abnormal medium resistivity through the early warning and monitoring server 6, and the abnormal area can be accurately defined according to the change degree of the resistivity, so that the abnormal area which starts to leak can be accurately located.
Specifically, the second detection assembly includes a plurality of pressure and flow sensors 5, and the pressure and flow sensors 5 are connected with an early warning and monitoring server 6. The pressure and flow sensor 5 monitors the flow of oil in the pipeline and the pressure difference between adjacent sensors to carry out sensitive feedback on the tiny leakage, so that the range of the leakage point can be approximately determined.
The method for detecting the leakage by using the oil pipeline leakage detection system comprises the following steps:
a plurality of first monitoring points are selected on the lower side of an oil pipeline 1 to be tested, a high-density graphite electrode 2 is arranged on each first monitoring point, one end of the high-density graphite electrode 2 is buried in the first monitoring point, the distance between the end of the high-density graphite electrode 2 and the oil pipeline to be tested is 50cm, the other end of the high-density graphite electrode 2 is electrically connected with a high-density electric host computer 3, and the high-density electric host computer 3 is connected with an early warning and monitoring server 6.
A plurality of second monitoring points are selected in the oil pipeline 1 to be tested, a pressure and flow sensor 5 is arranged on each second monitoring point, and the pressure and flow sensor 5 is connected with an early warning and monitoring server 6.
The early warning and monitoring server 6 is configured to receive a resistivity signal sent from the high-density electrical method host 3, convert the resistivity signal, the flow signal and the pressure signal into corresponding resistivity values, flow values and pressure values, obtain a pressure difference value by differentiating two pressure values at adjacent second monitoring points obtained at the same time, compare the pressure difference value with the pressure difference value obtained at the previous time to obtain a pressure variation, and when the pressure variation is greater than a preset pressure variation threshold, and meanwhile, determine that the section is a leakage section if the flow variation on the section is greater than the preset flow variation threshold, and the early warning and monitoring server 6 is further configured to screen a plurality of resistivity values on the leakage section to obtain a first monitoring point corresponding to the first resistivity value with increased resistivity value, and determine that the first monitoring point is the position of the leakage point.
The invention can accurately monitor the change of resistivity caused by the leaked petroleum at the leakage point by using a high-density electrical method, the pressure and flow sensor 5 can carry out sensitive feedback on tiny leakage by monitoring the flow of the petroleum in a pipeline and the pressure difference of adjacent sensors, the range of the leakage point can be roughly determined, and then the resistivity of a medium before leakage and the resistivity after leakage are compared, the resistivity of the medium can be increased by petroleum, and the initial point for increasing the resistivity of the medium is the specific position of the leakage, so that the specific position of the leakage is judged, the detection and the positioning of the leakage of small flow are very effective, the detection and the positioning are rapid, and the environmental negative effect caused by the leakage of the oil pipeline can be reduced to the minimum.
Example 2
As a further improvement of embodiment 1, in order to implement the remote monitoring function, as shown in fig. 2, the system further includes a data transceiver component 4, where the data transceiver component 4 is electrically connected to the high-density electrical host 3 and the pressure and flow sensor 5, respectively, and is configured to receive the resistivity signal, the flow signal, and the pressure signal, and forward the resistivity signal, the flow signal, and the pressure signal to the early warning and monitoring server 6 through a wireless transmission manner.
The method for detecting the leakage by using the oil pipeline leakage detection system comprises the following steps:
a plurality of first monitoring points are selected on the lower side of an oil pipeline 1 to be tested, a high-density graphite electrode 2 is arranged on each first monitoring point, one end of the high-density graphite electrode 2 is buried in the first monitoring point, the distance between the end of the high-density graphite electrode 2 and the oil pipeline to be tested is 50cm, the other end of the high-density graphite electrode 2 is electrically connected with a high-density electric host computer 3, and the high-density electric host computer 3 is connected with a data transceiver component 4.
A plurality of second monitoring points are selected in the oil pipeline 1 to be tested, a pressure and flow sensor 5 is arranged on each second monitoring point, the pressure and flow sensor 5 is connected with a data receiving and transmitting assembly 4, and the data receiving and transmitting assembly 4 is in wireless connection with an early warning and monitoring server 6. The data transceiver component 4 receives the resistivity signal, the flow signal and the pressure signal and forwards the resistivity signal, the flow signal and the pressure signal to the early warning and monitoring server 6 synchronously.
The early warning and monitoring server 6 receives the resistivity signal, the flow signal and the pressure signal forwarded by the data receiving and transmitting assembly 4, converts the resistivity signal, the flow signal and the pressure signal into corresponding resistivity values, flow values and pressure values, then, obtains a pressure difference value by differentiating two pressure values on adjacent second monitoring points obtained at the same time, compares the pressure difference value with the pressure difference value obtained at the previous time to obtain a pressure change amount, and judges that the section is a leakage section when the pressure change amount is larger than a preset pressure change threshold value and the flow change amount on the section is larger than the preset flow change threshold value, the early warning and monitoring server 6 is also used for screening a plurality of resistivity values on the leakage section to obtain a first monitoring point corresponding to a first resistivity value with the sudden increase of the resistivity value, and judges that the section is the position of the leakage point.
Under this scheme, the detected signal that monitors on site can be transmitted by wireless through data transceiver module 4, is convenient for realize remote monitoring.
Example 3
As a further improvement of embodiment 2, in order to implement the remote early warning function, as shown in fig. 3, the system further includes a central control terminal 7, where the central control terminal 7 is connected to the early warning and monitoring server 6, and is configured to receive the position of the leakage point, and generate a prompt message for notifying the relevant maintenance personnel to reach the position of the pipeline leakage for maintenance. The central control terminal 7 and the early warning and monitoring server 6 are also connected with a portable mobile terminal 8, and the portable mobile terminal 8 is used for receiving the position and prompt information of the leakage point.
The oil pipeline leakage detection method adopts the oil pipeline leakage detection system, as shown in fig. 4, and comprises the following steps:
a plurality of first monitoring points are selected on the lower side of an oil pipeline 1 to be tested, a high-density graphite electrode 2 is arranged on each first monitoring point, one end of the high-density graphite electrode 2 is buried in the first monitoring point, the distance between the end of the high-density graphite electrode 2 and the oil pipeline to be tested is 50cm, the other end of the high-density graphite electrode 2 is electrically connected with a high-density electric host computer 3, and the high-density electric host computer 3 is connected with a data transceiver component 4.
A plurality of second monitoring points are selected in the oil pipeline 1 to be tested, a pressure and flow sensor 5 is arranged on each second monitoring point, the pressure and flow sensor 5 is connected with a data receiving and transmitting assembly 4, and the data receiving and transmitting assembly 4 is in wireless connection with an early warning and monitoring server 6. The data transceiver component 4 receives the resistivity signal, the flow signal and the pressure signal and forwards the resistivity signal, the flow signal and the pressure signal to the early warning and monitoring server 6 synchronously.
The early warning and monitoring server 6 receives the resistivity signal, the flow signal and the pressure signal forwarded by the data receiving and transmitting assembly 4, converts the resistivity signal, the flow signal and the pressure signal into corresponding resistivity values, flow values and pressure values, then, obtains a pressure difference value by differentiating two pressure values on adjacent second monitoring points obtained at the same time, compares the pressure difference value with the pressure difference value obtained at the previous time to obtain a pressure variation, and judges that the section is a leakage section when the pressure variation is larger than a preset pressure variation threshold value and the flow variation on the section is larger than the preset flow variation threshold value, the early warning and monitoring server 6 is also used for screening a plurality of resistivity values on the leakage section to obtain a first monitoring point corresponding to a first resistivity value with the sudden increase of the resistivity value, and judges that the first monitoring point is the position of the leakage point; the early warning and monitoring server 6 synchronously sends the position of the leakage point to the central control terminal 7 and the portable mobile terminal 8, and after the central control terminal 7 receives the position of the leakage point, prompt information is generated and sent to the portable mobile terminal 8 so as to inform relevant maintenance personnel of reaching the position of the pipeline leakage for maintenance.
According to the oil pipeline leakage detection system and method provided by the invention, the change of resistivity caused by oil leaked from a leakage point can be accurately monitored by using a high-density electrical method, the pressure and flow sensor 5 can carry out sensitive feedback on tiny leakage through monitoring the flow of the oil in the pipeline and the pressure difference of adjacent sensors, the range of the leakage point can be roughly determined, the resistivity of a medium before leakage and the resistivity after leakage are compared, the resistivity of the medium is increased due to the oil, the initial point for increasing the resistivity of the medium is the specific position of the leakage, so that the specific position of the leakage is judged, the detection and positioning of the leakage of small flow are very effective, the detection and positioning are rapid, the environmental negative effect caused by the leakage of the oil pipeline can be reduced to the minimum, the detection, the transmission, the control and the early warning of the monitoring function of a comprehensive system can be realized, the full-coverage monitoring of the leakage of the oil conveying pipeline can be realized by using wireless transmission, and the practicability is strong, and the popularization is worth.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations within the scope of the present invention will be apparent to those skilled in the art.
Claims (8)
1. An oil conduit leak detection system, comprising:
the first detection assembly is used for monitoring resistivity signals of a plurality of first monitoring points in real time, and the plurality of first monitoring points are positioned on one side of the oil pipeline (1) and are arranged along the length direction of the oil pipeline (1);
the second detection assembly is used for monitoring flow signals and pressure signals of petroleum on a plurality of second monitoring points in real time, and the plurality of second monitoring points are positioned in the oil pipeline (1) and are arranged along the length direction of the oil pipeline (1);
the early warning and monitoring server (6) is used for receiving the resistivity signal, the flow signal and the pressure signal, converting the resistivity signal, the flow signal and the pressure signal into corresponding resistivity values, flow values and pressure values, obtaining pressure difference values by making difference between two pressure values on adjacent second monitoring points obtained at the same moment, comparing the pressure difference values with the pressure difference values obtained at the previous moment to obtain pressure change amounts, and judging that the section is a leakage section when the pressure change amounts are larger than a preset pressure change threshold value and the flow change amounts on the section are larger than a preset flow change threshold value, wherein the early warning and monitoring server (6) is also used for screening a plurality of resistivity values on the leakage section to obtain first points corresponding to the first resistivity values with increased resistivity values and judging that the first points are leakage points.
2. The oil conduit leak detection system of claim 1, wherein the first detection assembly comprises:
the high-density graphite monitoring system comprises a plurality of high-density graphite electrodes (2), wherein one ends of the high-density graphite electrodes (2) are buried at the first monitoring points, the other ends of the high-density graphite electrodes (2) are electrically connected with a high-density electrical method host machine (3), and the high-density electrical method host machine (3) is connected with an early warning and monitoring server (6).
3. The oil pipeline leakage detection system according to claim 2, characterized in that the distance between the end of the high density graphite electrode (2) embedded at the first monitoring point and the oil pipeline to be measured is 45-50cm.
4. The oil pipeline leak detection system according to claim 2, characterized in that the distance between two adjacent high density graphite electrodes (2) is 1.8-2.2 meters.
5. The oil conduit leak detection system of any one of claims 2, 3, and 4, wherein the second detection assembly comprises:
and the pressure and flow sensors (5) are connected with the early warning and monitoring server (6).
6. The oil pipeline leak detection system of claim 5, further comprising a data transceiver assembly (4), the data transceiver assembly (4) being connected to the high density electrical host (3), the pressure and flow sensor (5), the pre-warning and monitoring server (6) for receiving the resistivity signal, the flow signal and the pressure signal and forwarding the resistivity signal, the flow signal and the pressure signal to the pre-warning and monitoring server (6) by wireless transmission.
7. The oil conduit leak detection system of claim 6, further comprising:
the central control terminal (7) is connected with the early warning and monitoring server (6) and is used for receiving the position of the leakage point and generating prompt information for informing relevant maintenance personnel to reach the pipeline leakage position for maintenance;
the portable mobile terminal (8) is respectively connected with the central control terminal (7) and the early warning and monitoring server (6) and is used for receiving the position of the leakage point and the prompt information.
8. An oil pipeline leak detection method employing the oil pipeline leak detection system of claim 7, comprising the steps of:
a plurality of first monitoring points are selected on the lower side of an oil pipeline (1) to be detected, a high-density graphite electrode (2) is arranged on each first monitoring point, and resistivity signals of the plurality of first monitoring points are monitored in real time and transmitted to the data receiving and transmitting assembly (4);
selecting a plurality of second monitoring points in an oil pipeline (1) to be detected, setting a pressure and flow sensor (5) on each second monitoring point, and monitoring flow signals and pressure signals of petroleum on the plurality of second monitoring points in real time and transmitting the flow signals and the pressure signals to the data transceiver component (4);
the data transceiver component (4) receives the resistivity signal, the flow signal and the pressure signal and synchronously forwards the resistivity signal, the flow signal and the pressure signal to the early warning and monitoring server (6);
the early warning and monitoring server (6) receives the resistivity signal, the flow signal and the pressure signal, converts the resistivity signal, the flow signal and the pressure signal into corresponding resistivity values, flow values and pressure values, then obtains a pressure difference value by differentiating two pressure values on adjacent second monitoring points obtained at the same moment, compares the pressure difference value with the pressure difference value obtained at the previous moment to obtain a pressure variation, and judges that the section is a leakage section when the pressure variation is larger than a preset pressure variation threshold value and the flow variation on the section is larger than the preset flow variation threshold value, and the early warning and monitoring server (6) is also used for screening a plurality of resistivity values on the leakage section to obtain a first monitoring point corresponding to a first resistivity value with sudden increase of the resistivity value and judging that the section is the position of the leakage point;
the early warning and monitoring server (6) synchronously sends the position of the leakage point to the central control terminal (7) and the portable mobile terminal (8), and the central control terminal (7) generates prompt information to send to the portable mobile terminal (8) after receiving the position of the leakage point so as to inform relevant maintenance personnel to reach the pipeline leakage position for maintenance.
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| CN202311292295.XA CN117329461A (en) | 2023-10-08 | 2023-10-08 | Oil pipeline leak detection system and method |
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| CN202311292295.XA CN117329461A (en) | 2023-10-08 | 2023-10-08 | Oil pipeline leak detection system and method |
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| CN118088948A (en) * | 2024-04-29 | 2024-05-28 | 山东恒量测试科技有限公司 | Pipeline leakage monitoring and analyzing method, system, terminal and medium based on pressure gauge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118088948A (en) * | 2024-04-29 | 2024-05-28 | 山东恒量测试科技有限公司 | Pipeline leakage monitoring and analyzing method, system, terminal and medium based on pressure gauge |
| CN118088948B (en) * | 2024-04-29 | 2024-07-23 | 山东恒量测试科技有限公司 | Pipeline leakage monitoring and analyzing method, system, terminal and medium based on pressure gauge |
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