Soil pollution monitoring device and method for buried oil pipeline in oil depot

Abstract

The application provides a kind of oil depot in-ground oil pipeline soil pollution monitoring device and method, the monitoring device includes leakage monitoring device, the leakage monitoring device includes sleeve, support and leakage collector, the sleeve is used to be in the outer sleeve of oil pipeline;The support is used to support and install above the pipeline;The leakage collector is used to collect the liquid leaked from the in-ground oil pipeline in the depot, further, the monitoring method of the above monitoring device utilizes the inductive electrode to conduct the conductive channel after the leakage oil is soaked, and judges the pipeline leakage by the current change of the current sensor, and further realizes the monitoring of the pipeline leakage, with the characteristics of simple implementation, high monitoring reliability, through the setting of the device, automatic monitoring is realized in the oil depot, the speed of monitoring is improved, and the reliability of supervision is ensured.

Description

[Technical Field]

[0001] This invention relates to a monitoring device and method, and more particularly to a monitoring device and method for soil pollution of buried oil pipelines within an oil depot. [Background Technology]

[0002] Oil depot pipelines frequently need to be buried or traverse roads, railways, highways, and other important areas within the depot, such as tank areas, pump houses (sheds), truck loading docks, and railway trestle bridges. Therefore, buried oil pipelines are one of the methods of transporting refined oil within oil depots and are an important component of oil pipeline transportation. However, buried oil pipeline transportation is affected by factors such as engineering construction standards, construction quality, the concealment of the soil, the length of the pipeline route, complex operating conditions, and third-party influences, resulting in a relatively high probability of accidents. Therefore, it is necessary to establish a sound early warning system for buried oil pipelines within oil depots to protect operating pipelines. Buried oil pipeline early warning systems are mainly divided into two categories based on their early warning principles: evaluation and early warning methods based on mathematical models and data-driven evaluation and early warning methods. Data-driven evaluation and early warning methods require analysis of long-term pipeline operation data, and the early warning analysis of buried oil pipelines in oil depots needs to have high predictive accuracy and strong fault tolerance.

[0003] Buried oil pipelines within oil depots are prone to leaks due to their direct underground location, making leak detection difficult and repair challenging. They require special operations such as excavation, temporary power supply, and hot work, posing serious safety hazards. Current technology involves monitoring the soil near the oil depot, but this has a large monitoring range, making it impossible to pinpoint the leak location. It also fails to monitor the buried pipelines within the depot, hindering timely leak detection and preventing rapid pipeline repair and leak mitigation, potentially leading to sudden environmental incidents. Currently, buried oil pipelines within oil depots are typically inspected routinely by personnel, relying on checks for oil stains on the pipeline surface and oil slicks in the drainage system to determine if a leak is present. The manual inspection method has the following three problems: (1) High labor intensity: Since the buried oil pipeline is buried underground, once a suspected leakage is found, a large area of ​​the ground needs to be dug up for inspection one by one. It is impossible to accurately find the leakage point of the buried pipeline, and the labor intensity is high; (2) High rate of missed detection: On the one hand, the manual inspection method is more subjective and is easily affected by the sense of responsibility, external environment and weather. For example, when the weather is hot, the groundwater level is low and there is no heavy rainfall, the oil leaked from the buried oil pipeline cannot float to the ground in time or cannot flow from the soil to the underground drainage system for discharge. On the other hand, it is impossible for manual inspection to be carried out on-site at all times, so there will be missed detection. Moreover, due to the late discovery time, the leakage has already formed a large scale when the oil stains, oil smell, oil flowers and other phenomena are found on the ground or in the drainage system; (3) The leakage has formed a large scale when it is discovered: Depending on the size of the leak, some small leaks can only be discovered after the leak has formed a large scale, and it is impossible to discover the leak of the buried oil pipeline in the first time.

[0004] While pipeline leak monitoring devices provide early warnings about pressure and oil volume within pipelines, these warnings are located inside the pipeline and cannot detect soil pollution caused by ruptures in buried oil pipelines. Therefore, a monitoring device needs to be designed to directly monitor soil pollution and, consequently, detect leaks in buried oil pipelines. [Summary of the Invention]

[0005] The technical problem to be solved by the present invention is to provide a soil pollution monitoring device and method for buried oil pipelines in oil depots, which addresses the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a soil pollution monitoring device for buried oil pipelines within an oil depot. This monitoring device includes a leakage monitoring device, which comprises a sleeve, a support, and a leakage collector. The sleeve is used to cover the outside of the oil pipeline; the support is used to support the installation above the pipeline; and the leakage collector is used to collect liquid leaking from the pipeline. The leakage collector includes a shell, a liquid sensing chamber, a liquid guide hole, a drain pipe, a sealing valve, a first contact head, a second contact head, a sensor, a first sensing electrode, a second sensing electrode, a grounding electrode, and soil.

[0007] Furthermore, the outer casing is mounted on a bracket, the oil delivery pipe is located inside the outer casing, the liquid guide hole is located on the side wall of the outer casing, the oil delivery pipe is connected to the drain pipe through the liquid guide hole, and the sensing chamber is located at the bottom of the outer casing.

[0008] Furthermore, one end of the drainage tube is connected to the liquid guiding hole, and the other end is connected to the upper part of the sensing chamber. A sealing valve is provided on the upper part of the sensing chamber, and a first sensing electrode is provided at the bottom of the sensing chamber. The first contact head is located inside the sensing chamber, and the second contact head is located outside the sensing chamber. The first contact head is connected to a second sensing electrode, and the second sensing electrode is connected to the first sensing electrode via a wire. The sensor is located on the outside of the sensing chamber and is connected to the first sensing electrode via a wire. The grounding electrode is located on the outer wall of the leak collector and is in contact with the soil.

[0009] Furthermore, the inner wall of the outer casing is provided with a drainage tube, one end of which is connected to the sensing chamber and the other end to the liquid guiding hole. The outer wall of the sleeve is provided with a grounding electrode, and the sleeve is connected to the outer casing of the leak collector through a grounding wire, so that the sleeve, the outer casing of the leak collector, the grounding wire, and the grounding electrode are connected to form an induction circuit. When the pipeline leaks, the oil expands the drainage tube, and the leaking liquid enters the sensing chamber through the drainage tube, connecting the first liquid conductive sensing electrode and the second sensing electrode in the sensing chamber. The leak monitoring device detects the current and reports the pipeline fault point.

[0010] On the other hand, the present invention provides a method for monitoring soil pollution in buried oil pipelines within an oil depot. The specific steps are as follows: a) Setting up a monitoring device: Setting up the monitoring device as described above, and laying the casing around the oil pipeline; b) Measuring initial parameters: Measuring the current and resistance values ​​of the leak monitoring device in the initial state using the monitoring device, and using the resistance value as the initial resistance value; c) Monitoring the oil pipeline: When the oil pipeline leaks, the casing around the pipeline is grounded, and induction electrode one and induction electrode two are connected. The data measured by the sensor is compared with the initial resistance value. When the resistance value changes within 3%, the oil pipeline is determined to be leaking, and the location is marked.

[0011] Further, the oil leakage detection process in step c is as follows: 1) When the internal pressure of the oil pipeline changes, the contact resistance between the grounding electrode and the soil changes. The resistance of the leakage monitoring device in the initial state is measured by the sensor. When the resistance value is between 0.5-1.0 MΩ, the resistance value is collected by the testing device as the initial resistance value; 2) When the oil pipeline leaks, the leaking liquid enters the soil layer between the oil pipeline and the casing and gradually flows upward. It contacts and forms a liquid channel between sensing electrode one and sensing electrode two; 3) When the liquid channel is connected, sensing electrode one and sensing electrode two are connected by the liquid, thereby transmitting current from sensing electrode one to sensing electrode two; 4) When the current measured by the sensor is 10-40mA, it is determined that the pipeline has leaked and an alarm is triggered; 5) The leakage collection device is dug up, and it is determined that the actual location of the pipeline leak is consistent with the alarm location. If the pipeline leaks, the pipeline is repaired. If the locations are inconsistent, the alarm continues until the locations are consistent.

[0012] Further, step b specifically includes the following steps: S1, excavate the soil layer between induction electrode one and induction electrode two, remove induction electrode one and induction electrode two, wash them with pure water, and wrap them with waterproof insulating tape, with each turn spaced 0.5cm apart, ensuring that the waterproof insulating tape is in contact with the grounding electrode; S2, insert one end of induction electrode two 24 and connect it to the wire, check whether it is sealed, and install induction electrode two into the housing, ensuring that the bottom of induction electrode two is 2-5cm above induction electrode one; S3, close the induction chamber, wrap it with waterproof insulating tape 2-3 times, with each turn spaced 0.5cm apart, ensuring that the waterproof insulating tape is in contact with the grounding electrode, and seal it through the sealing valve; S4, install the housing onto the bracket and check whether the sealing valve is closed; S5, move the bracket to a position 25-4m away from the next bracket, and repeat the above steps S2-S4; S6, excavate the lower end of the sleeve, remove the grounding electrode, and connect it through the grounding wire; S7, bury the soil, so that the sleeve, bracket and leakage collector are buried at a depth of 2m.

[0013] Further, step c specifically includes the following steps: SS1, sequentially measure each oil pipeline in the oil depot as described in step b above, and record the resistance values ​​of all pipelines as initial resistance values; SS2, record the resistance values ​​every 3 months; SS3, use the resistance values ​​as the current change rate and record them. If the current change rate exceeds 12%, an alarm is triggered, and the soil between induction electrode one and induction electrode two is excavated to check for pipeline damage; SS4, if the pipeline is undamaged, continue monitoring and re-fill the soil; SS5, if the pipeline is damaged, determine the location of the damage by using the sleeve position and repair it at that location; In step SS2, the resistance values ​​are recorded every 6 months; the resistance values ​​are used as the current change rate and recorded. If the current change rate exceeds 13%, an alarm is triggered, and the soil between induction electrode one and induction electrode two is excavated to check for pipeline damage; SS3, if the pipeline is undamaged, continue monitoring and re-fill the soil; SS4, if the pipeline is damaged, determine the location of the damage by using the sleeve position and repair it at that location.

[0014] Compared with the prior art, the specific technical effects of the present invention are as follows:

[0015] This invention discloses a soil pollution monitoring device for buried oil pipelines within an oil depot. The device utilizes inductive electrodes to conduct conductive channels after the leaked oil has soaked in the solution. By detecting changes in current through a current sensor, the device identifies pipeline leaks and monitors them. It features simple implementation and high monitoring reliability. The device enables automatic monitoring within the oil depot, improving monitoring speed and ensuring reliable oversight. [Image Description]

[0016] Figure 1 This is a schematic diagram of a soil pollution monitoring device for buried oil pipelines within an oil depot, according to an embodiment of the present invention.

[0017] Figure 2 This is a cross-sectional schematic diagram of the soil pollution monitoring device for buried oil pipelines in an oil depot, according to an embodiment of the present invention.

[0018] Figure 3 This is a flowchart illustrating the soil pollution monitoring method for buried oil pipelines within an oil depot, as described in an embodiment of the present invention.

[0019] The components include a leak collector 1, a housing 10, an oil pipeline 11, a liquid sensing chamber 12, a sleeve 13, a liquid guide hole 14, a drainage pipe 15, a sealing valve 16, a grounding electrode 17, a first contact head 18, a second contact head 19, a bracket 20, a sensor 21, soil 22, a first sensing electrode 23, and a second sensing electrode 24. [Detailed Implementation]

[0020] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0022] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Example 1

[0024] A soil pollution monitoring device for buried oil pipelines within an oil depot is disclosed. The monitoring device includes a leak monitoring device, which comprises a sleeve 13, a support 20, and a leak collector 1. The sleeve 13 is used to cover the outside of the oil pipeline 11; the support 25 is used to support the installation above the oil pipeline 11; and the leak collector is used to collect liquid leaking from the pipeline.

[0025] like Figure 2As shown, the leak collector includes a housing 10, a liquid sensing chamber 12, a liquid guiding hole 14, a drainage pipe 15, a sealing valve 16, a grounding electrode 17, a first contact head 18, a second contact head 19, a bracket 20, a sensor 21, soil 22, a first sensing electrode 23, and a second sensing electrode 24. The sensing chamber 12 is used to collect leaked oil, the liquid guiding hole 14 is used to guide the leaked oil into the drainage pipe 15, and the sealing valve 16 is normally open to control the liquid flow rate. Simultaneously, the sealing valve 16 has good sealing performance, effectively preventing fluid leakage and ensuring the safe operation of the system. Upon detection of an oil leak, it needs to be closed to prevent excessive leakage and oil seepage into the soil. The outer casing 10 is mounted on a bracket. The oil delivery pipe 11 is located inside the outer casing 10. The liquid guide hole 14 is located on the side wall of the outer casing 10. The oil delivery pipe 11 is connected to the drainage pipe 15 through the liquid guide hole 14. The sensing chamber 12 is located at the bottom of the outer casing 10. One end of the drainage pipe 15 is connected to the liquid guide hole 14, and the other end is connected to the sensing chamber 12. A sealing valve 16 is provided on the upper part of the sensing chamber 12, and a first sensing electrode 23 is provided at the bottom of the sensing chamber 12. The first contact head 18 is located inside the sensing chamber 12 and is connected to a second sensing electrode 24. The second sensing electrode 24 and the first sensing electrode 23 are connected by a wire. The sensor 21 is located on the outside of the sensing chamber 12 and is used for transmission or alarm positioning. The sensor 21 and the first sensing electrode 23 are connected by a wire. The grounding electrode 17 is located on the wall of the outer casing 10 of the leak collector and is in contact with the soil 22.

[0026] Preferably, the outer wall of the sleeve 13 is provided with a grounding electrode 17, and the sleeve 13 is connected to the outer shell of the leakage collector 1 through a grounding wire 26, so that the sleeve, the outer shell 10 of the leakage collector, the grounding wire, and the grounding electrode 17 are connected to form an induction circuit.

[0027] Preferably, when the pipeline leaks, the oil will open the drain pipe 15, and the leaking liquid will enter the sensing chamber 12 through the drain pipe 15, connecting the liquid conductive electrodes 23 and 24 of the sensing chamber 12. The leak monitoring device will detect the current and report the pipeline fault point.

[0028] Example 2

[0029] A method for monitoring soil pollution in buried oil pipelines within an oil depot comprises the following steps: a) Setting up a monitoring device: Setting up the monitoring device as described in any of the preceding claims, and installing a casing around the oil pipeline; b) Measuring initial parameters: Measuring the current and resistance values ​​of the leak monitoring device in its initial state using the monitoring device, and using the resistance value as the initial resistance value; c) Monitoring the oil pipeline: When the oil pipeline leaks, the casing around the pipeline is grounded, and induction electrode 23 and induction electrode 24 are connected. The data measured by the sensors is compared with the initial resistance value. When the resistance value changes within 3%, the oil pipeline 11 is determined to be leaking, and the location is marked.

[0030] Preferably, the oil leakage detection process in step c is as follows: 1) When the internal pressure of the oil pipeline 11 changes, causing a change in the contact resistance between the grounding electrode 17 and the soil 22, the resistance of the leakage monitoring device in the initial state is measured by the sensor 21. When the resistance value is between 0.5-1.0 MΩ, the resistance value is collected by the testing device as the initial resistance value; 2) When the oil pipeline 11 leaks, the leaking liquid enters the soil layer between the oil pipeline 11 and the casing 13 and gradually flows downwards, contacting and forming a liquid channel between the first sensing electrode 23 and the second sensing electrode 24; 3) When the liquid channel is connected, the first sensing electrode 23 and the second sensing electrode 24 are connected by the liquid, thereby transmitting current from the first sensing electrode 23 to the second sensing electrode 24; 4) When the current measured by the sensor 21 is 10-40 mA, it is determined that the pipeline has leaked and an alarm is triggered; 5) The leakage collection device is dug up, and it is determined that the actual location of the leak in the pipeline is consistent with the alarm location, then the pipeline is repaired.

[0031] Example 3

[0032] A method for monitoring soil pollution in buried oil pipelines within an oil depot, comprising the following steps: a) Setting up a monitoring device: Setting up the monitoring device as described in any of the preceding claims, and installing a casing around the oil pipeline; b) Measuring initial parameters: Measuring the current and resistance value of the leakage monitoring device in its initial state using the monitoring device, and using the resistance value as the initial resistance value; Specifically, step b includes the following steps: S1, excavating the soil layer between induction electrode 1 23 and induction electrode 24, removing induction electrode 1 23 and induction electrode 24, washing them with pure water, and wrapping them with waterproof insulating tape, with each turn spaced 0.5 cm apart, ensuring that the waterproof insulating tape is in contact with the grounding electrode 17; S2, inserting one end of induction electrode 24 into... S2. Connect the casing 10 to the wire and check that it is sealed. Install the second sensing electrode 24 into the housing and ensure that the bottom of the second sensing electrode 24 is 2-5cm above the first sensing electrode 23. S3. Close the sensing chamber 12 and wrap it with waterproof insulating tape 2-3 times, with each turn spaced 0.5cm apart. Ensure that the waterproof insulating tape is in contact with the grounding electrode 17 and seal it through the sealing valve. S4. Install the housing 10 onto the bracket 25 and check that the sealing valve is closed. S5. Move the bracket 25 to a position 25m away from the next bracket and repeat the above steps S2-S4. S6. Dig open the lower end of the sleeve 13 to expose the grounding electrode 17 and connect it through the grounding wire. S7. Bury the casing 13, bracket 25 and leakage collector at a depth of 2m.

[0033] c. Monitoring oil pipelines: When an oil pipeline leaks, the sleeve on the pipeline is grounded, and the first sensing electrode 23 and the second sensing electrode 24 are connected. The data measured by the sensor is compared with the initial resistance value. When the resistance value changes within 3%, it is determined that the oil pipeline 11 is leaking and the location is marked.

[0034] Preferably, step c specifically includes the following steps: SS1, sequentially measure each oil pipeline in the oil depot as described in step b above, and record the resistance values ​​of all pipelines as initial resistance values; SS2, record the resistance values ​​every 3 months; SS3, use the resistance values ​​as the current change rate and record them. When the current change rate exceeds 12%, an alarm is triggered, and the soil between induction electrode 1 23 and induction electrode 24 is dug up to check if the pipeline is damaged; SS4, if the pipeline is not damaged, continue monitoring and re-backfill; SS5, if the pipeline is damaged, determine the location of the damage through the sleeve 13 and repair it at that location.

[0035] Preferably, in step SS2, the resistance value is recorded every 6 months; the resistance value is used as the current change rate and is recorded. When the current change rate exceeds 13%, an alarm is triggered, and the soil between the first sensing electrode 23 and the second sensing electrode 24 is dug up to check if the pipeline is damaged; SS3, if the pipeline is not damaged, monitoring continues and the pipeline is re-buried; SS4, if the pipeline is damaged, the location of the damage is determined by the position of the sleeve 13 and repaired at that location.

[0036] This invention discloses a soil pollution monitoring device for buried oil pipelines within an oil depot. The device uses a casing to enclose the pipeline and grounds the casing, burying it in the soil. Grounding through the casing reduces grounding resistance and increases the contact area of ​​the sensing electrodes, thus avoiding the drawbacks of traditional monitoring devices that cannot detect high grounding resistance and affect monitoring accuracy. A bracket is installed above the pipeline to mount a leak collector, connecting the pipeline via a liquid guide hole. This positions the sensing chamber directly below any leak, improving monitoring accuracy. A sensor is installed on the outer casing to monitor the current, ensuring accurate alarm response and further enhancing monitoring accuracy.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A soil pollution monitoring device for buried oil pipelines within an oil depot, characterized in that, The monitoring device includes a leak detection device, which comprises a sleeve, a support, and a leak collector. The sleeve is used to cover the outside of the oil pipeline; the support is used to support the installation above the pipeline; the leak collector is used to collect liquid leaking from the buried oil pipeline within the reservoir; the leak collector includes a shell, a sensing chamber, a liquid guide hole, a drainage pipe, a sealing valve, a first contact head, a second contact head, a sensor, a first sensing electrode, a second sensing electrode, a grounding electrode, and soil. One end of the drainage tube is connected to the liquid guiding hole, and the other end is connected to the upper part of the sensing chamber. A sealing valve is provided on the upper part of the sensing chamber, and a first sensing electrode is provided at the bottom of the sensing chamber. The first contact head is located inside the sensing chamber, and the second contact head is located outside the sensing chamber. The first contact head is connected to a second sensing electrode, and the second sensing electrode is connected to the first sensing electrode by a wire. The sensor is located on the outside of the sensing chamber and is connected to the first sensing electrode by a wire. The grounding electrode is located on the outer wall of the leak collector and is in contact with the soil. The inner wall of the outer casing is provided with a drainage tube, one end of which is connected to the sensing chamber and the other end is connected to the liquid guide hole. The outer wall of the sleeve is provided with a grounding electrode. The sleeve is connected to the outer casing of the leak collector through a grounding wire, so that the sleeve, the outer casing of the leak collector, the grounding wire, and the grounding electrode are connected to form an induction circuit. When the pipeline leaks, the oil expands the drainage tube, and the leaking liquid enters the sensing chamber through the drainage tube. It conducts electricity in the sensing chamber, connecting the first sensing electrode and the second sensing electrode. The leak monitoring device detects the current and reports the pipeline fault point.

2. The soil pollution monitoring device for buried oil pipelines within an oil depot according to claim 1, characterized in that, The outer casing is mounted on a bracket, the oil delivery pipe is located inside the outer casing, the liquid guide hole is located on the side wall of the outer casing, the oil delivery pipe is connected to the drain pipe through the liquid guide hole, and the sensing chamber is located at the bottom of the outer casing.

3. A method for monitoring soil pollution in buried oil pipelines within an oil depot, characterized in that, The specific steps are as follows: a) Set up the monitoring device: Set up the monitoring device as described in any one of claims 1-2, and place the sleeve over the outside of the oil pipeline for pipe laying; b) Measure the initial parameters: Measure the current and resistance values ​​of the leakage monitoring device in the initial state through the monitoring device, and use the resistance value as the initial resistance value; c) Monitor the oil pipeline: When the oil pipeline leaks, the sleeve on the pipeline is grounded, the first sensing electrode and the second sensing electrode are connected, and the data measured by the sensor is compared with the initial resistance value. When the resistance value changes within 3%, the oil pipeline is determined to be leaking, and the location is marked.

4. The method for monitoring soil pollution of buried oil pipelines within an oil depot according to claim 3, characterized in that, The oil leakage detection process in step c is as follows: 1) When the internal pressure of the oil pipeline changes, the contact resistance between the grounding electrode and the soil changes. The resistance of the leakage monitoring device in the initial state is measured by the sensor. When the resistance value is between 0.5-1.0 MΩ, the resistance value is collected by the testing device as the initial resistance value; 2) When the oil pipeline leaks, the leaking liquid enters the soil layer between the oil pipeline and the casing and gradually flows upward. It contacts and forms a liquid channel between sensing electrode one and sensing electrode two; 3) When the liquid channel is connected, sensing electrode one and sensing electrode two are connected by the liquid, thereby transmitting current from sensing electrode one to sensing electrode two; 4) When the current measured by the sensor is 10-40mA, it is determined that the pipeline has leaked and an alarm is triggered; 5) The leak collector is dug up, and it is determined that the actual location of the leak in the pipeline is consistent with the alarm location. If the pipeline is not consistent, the alarm continues until the location is consistent.

Images