A petroleum pipeline structure, early warning system and early warning method

Abstract

The present application provides a petroleum pipeline structure, an early warning system and an early warning method, which relate to the technical field of anti-theft of petroleum pipelines. The system includes a pipeline network composed of multiple sections of petroleum pipelines; the system also includes a fluorescence detector arranged at the end of the pipeline network, the fluorescence detector is configured to detect fluorescent substances in petroleum, and determine the location of the pipeline network according to the fluorescent substances; an early warning device, the early warning device is connected to the fluorescence detector, and the early warning device is configured to generate an early warning signal according to the location of the corresponding fluorescent substance. The present application solves the problems of poor timeliness of the existing early warning of oil pipeline leakage through the above scheme.

Description

Technical Field

[0001] The present invention relates to the technical field of oil pipeline anti-theft, and in particular to an oil pipeline structure, an early warning system and an early warning method. Background Art

[0002] With the rapid development of pipeline network construction, drilling and oil theft incidents have occurred frequently in recent years, which has become a major hidden danger to the safe production of oil and gas pipelines. The drilling and oil theft phenomenon is characterized by variable time and location, professional personnel team, and more advanced technical tools. The main operation methods include concealed, lightning, tunnel, disguised, etc. Drilling and oil theft will cause open damage to the pipeline. Once the pipeline leaks, it may cause serious harm to the economy, ecology, public safety and other fields.

[0003] Traditional methods of detecting oil theft by drilling have many shortcomings. For example, the pipeline leakage monitoring system has low sensitivity and large recognition errors; the pipeline fiber optic early warning system is greatly affected by external interference and has a high probability of missed or false alarms; the external pipeline detection technology has a large workload, low recognition rate, long detection cycle and poor timeliness; although the leakage magnetic internal detection technology is relatively effective, it has a complicated construction process, high cost, long detection interval and poor timeliness.

[0004] The current mainstream perforation oil theft detection technology mainly includes the following aspects:

[0005] 1. Eddy current internal detection principle: Eddy current detection is a non-destructive detection method with high sensitivity, high precision and non-contact measurement, which is very suitable for the detection of oil theft holes in pipelines. The principle is that when a coil with alternating current is close to the conductor test block to be detected, under the action of the main magnetic field generated by the excitation coil, the conductor test block will generate eddy current, i.e. eddy current, in the changing magnetic field. Eddy current will also form a magnetic field. When there is a gap in the conductor test block, the distribution of eddy current will change, and the generated magnetic field will also change accordingly, affecting the impedance of the detection coil, so as to judge the performance of the tested block and whether it has defects through the electrical signal variable output by the detection coil.

[0006] 2. Anti-drilling and oil theft pipeline detector system structure: The mechanical system of the detector consists of three parts: power supply node, universal joint and computer node. The power supply node provides electrical energy, the universal joint ensures the passing capacity of the elbow in the pipeline, and the computer node is the core unit of the detector system, including eddy current detection probe, mileage measurement unit, etc.

[0007] 3. Electronic hardware system: The electronic hardware system mainly includes a processing unit with ARM as the core module, a power module, a data transmission and storage module, etc., which is used to collect and store data such as eddy current probes and mileage measurement units.

[0008] By establishing a database based on the detection data of oil theft through multiple rounds of drilling, the previous detection data are aligned and compared, and a signal feature model of oil theft holes is established to improve the recognition probability and detection efficiency of oil theft holes, reduce economic losses and the secondary hazards caused by them.

[0009] However, the above prior art has the following technical defects:

[0010] 1. The detection cycle is long, and it is impossible to detect and stop the oil theft by drilling in time.

[0011] 2. Because it is impossible to determine when drilling and oil theft occurs, inspections can only be carried out periodically, which requires full coverage inspection of the pipeline. The inspection process will cut off the oil supply, affect the normal transportation of oil, and may also cause interruptions to economic activities and economic losses. Especially during periods of tight oil supply or peak demand, the impact of such interruptions is particularly serious.

[0012] 3. The cost of oil theft detector is very high, and maintenance is required after each test to ensure its accuracy and reliability. This not only requires professional technicians, but also may involve expensive maintenance materials and tools. Summary of the invention

[0013] The present application provides an oil pipeline structure, an early warning system and an early warning method to solve the problems of poor timeliness of existing early warning of oil pipeline leakage.

[0014] In a first aspect, the present application provides a petroleum pipeline structure, the structure comprising:

[0015] An inner lining layer, the inner lining layer is in direct contact with petroleum, and a fluorescent substance is added to the preparation material of the inner lining layer;

[0016] A base material layer, wherein the base material layer is wrapped on the outer wall of the inner lining layer;

[0017] An outer protective layer is wrapped around the outer wall of the substrate layer.

[0018] In a second aspect, the present application also provides an oil pipeline early warning system, the system comprising:

[0019] A pipeline network consisting of multiple sections of oil pipelines, wherein the pipeline network adopts the above-mentioned oil pipeline structure;

[0020] The system further comprises:

[0021] A fluorescence detector disposed at a confluence point at the end of the pipeline network, the fluorescence detector being configured to detect fluorescent substances in petroleum and determine the location of the pipeline network according to the fluorescent substances;

[0022] An early warning device is connected to the fluorescence detector and is configured to generate an early warning signal according to the position of the fluorescent substance.

[0023] Preferably, the pipeline network includes several main lines, each of which is connected to several branch lines, different types of first fluorescent substances are added to different main lines, and each branch line of the same main line is added with the first fluorescent substance and the second fluorescent substance corresponding to the main line, and the types of the second fluorescent substances added to each branch line of the same main line are different;

[0024] The fluorescence detector is further configured to:

[0025] When the first fluorescent substance is detected, determining whether the second fluorescent substance is detected;

[0026] If not, determining the corresponding main circuit according to the spectrum of the first fluorescent substance;

[0027] If so, the corresponding branch line on the corresponding main line is determined according to the spectrum of the second fluorescent substance and the spectrum of the first fluorescent substance.

[0028] Preferably, the content of the first fluorescent substance added in the same main line decreases step by step along the direction of oil transportation, and the content of the second fluorescent substance added in each branch line decreases step by step along the direction of oil transportation, each main line has several sections, and each branch line has several sections;

[0029] The fluorescence detector is further configured to:

[0030] When the corresponding main line has been determined, the total content of the first fluorescent substance in the petroleum within a preset time is calculated to obtain first content information;

[0031] Determine a first corresponding section on the corresponding main line according to the first content information;

[0032] When the corresponding branch line on the corresponding main line has been determined, the total content of the second fluorescent substance in the petroleum within a preset time is calculated to obtain second content information;

[0033] A second corresponding section of the corresponding branch line on the corresponding main line is determined according to the second content information.

[0034] Preferably, the early warning device is further configured as:

[0035] Early warning information is generated according to the corresponding main line, the corresponding branch line, the first corresponding section and / or the second corresponding section.

[0036] In a third aspect, the present application also provides an oil pipeline early warning method, the method comprising:

[0037] Detect fluorescent substances in petroleum and generate fluorescent substance information;

[0038] Determine the corresponding position in the pipeline network according to the fluorescent substance information;

[0039] An early warning is issued according to the location.

[0040] Preferably, the pipeline network has a plurality of main lines, and different types of first fluorescent substances are added to different main lines;

[0041] The method further comprises:

[0042] When the first fluorescent substance is detected, acquiring a spectrum of the first fluorescent substance;

[0043] determining a corresponding main circuit according to the spectrum of the first fluorescent substance;

[0044] An early warning is issued for the pipeline where the corresponding main line is located.

[0045] Preferably, each of the main lines is connected to a plurality of branch lines, each branch line of the same main line is added with the first fluorescent substance and the second fluorescent substance corresponding to the main line, and each branch line of the same main line is added with a different type of the second fluorescent substance;

[0046] The method further comprises:

[0047] When the first fluorescent substance is detected, determining whether the second fluorescent substance is detected;

[0048] If so, the corresponding branch line is determined according to the spectrum of the second fluorescent substance and the spectrum of the first fluorescent substance, and an early warning is issued to the pipeline where the corresponding branch line is located on the corresponding main line.

[0049] Preferably, the content of the first fluorescent substance added in the same main line decreases step by step along the oil transportation direction, and each main line has several sections;

[0050] The method further comprises:

[0051] When the corresponding main line has been determined, the total content of the first fluorescent substance in the petroleum within a preset time is calculated to obtain first content information;

[0052] Determine a first corresponding section on the corresponding main line according to the first content information;

[0053] An early warning is issued for the pipeline in the first corresponding section on the corresponding main line.

[0054] Preferably, the content of the second fluorescent substance added in each branch line decreases step by step along the oil transportation direction, and each branch line has several sections;

[0055] The method further comprises:

[0056] When the corresponding branch line on the corresponding main line has been determined, the total content of the second fluorescent substance in the petroleum within a preset time is calculated to obtain second content information;

[0057] Determine a second corresponding section of the corresponding branch line on the corresponding main line according to the second content information;

[0058] An early warning is issued to the pipeline located in the second corresponding section on the corresponding branch line on the corresponding main line.

[0059] As can be seen from the above content, the present application provides an oil pipeline structure, an early warning system and an early warning method, wherein the system comprises a pipeline network composed of multiple sections of oil pipelines; the system further comprises a fluorescence detector arranged at the end of the pipeline network, the fluorescence detector being configured to detect fluorescent substances in oil and determine the location of the pipeline network according to the fluorescent substances; an early warning device, the early warning device being connected to the fluorescence detector, and the early warning device being configured to generate an early warning signal according to the location corresponding to the fluorescent substances. The present application solves the problems of poor timeliness of the existing early warning of oil pipeline leakage through the above scheme. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0061] Figure 1 A schematic diagram of an oil pipeline structure for this application;

[0062] Figure 2 A schematic diagram of an oil pipeline early warning system for this application;

[0063] Figure 3 The present invention is a flowchart of an oil pipeline early warning method for this application. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] Figure 1 This is a schematic diagram of an oil pipeline structure for this application.

[0066] See also Figure 1 It can be seen that this embodiment provides a petroleum pipeline structure, the structure comprising:

[0067] An inner lining layer 1, the inner lining layer 1 is in direct contact with petroleum, and a fluorescent substance is added to the preparation material of the inner lining layer 1;

[0068] A substrate layer 2, wherein the substrate layer 2 is wrapped on the outer wall of the inner lining layer 1;

[0069] The outer protective layer 3 is wrapped on the outer wall of the substrate layer 2 .

[0070] Specifically, in this embodiment, the substrate layer 2 and the outer protective layer 3 are both conventional settings of oil pipelines, and the core of this embodiment lies in the improvement of the preparation material of the inner lining layer 1.

[0071] Fluorescent substances are added to the conventional materials for preparing the inner lining layer 1, and used as the pipeline structure basis for early warning of oil theft when drilling holes in the oil pipeline.

[0072] It should be noted that conventional oil pipelines are also provided with inner coatings, adhesive layers, thermal insulation layers, outer coatings, cathodic protection layers, and external wrapping layers, and the oil pipeline structure in this embodiment can also be provided according to different requirements.

[0073] The inner coating, adhesive layer, thermal insulation layer, outer coating, cathode protection layer and outer wrapping layer mentioned above do not prevent the fluorescent substance from being added to the inner lining layer 1 in this embodiment.

[0074] Figure 2 This is a schematic diagram of an oil pipeline early warning system for this application.

[0075] See also Figure 2 It can be seen that, further, this embodiment also provides an oil pipeline early warning system. First of all, it should be explained that the system is used to warn of the drilling and oil theft behavior of the oil pipeline structure in the above embodiment. The system includes:

[0076] The pipeline network 10 is composed of multiple sections of oil pipelines. Specifically, in this embodiment, each pipeline in the pipeline network 10 adopts the oil pipeline structure in the above embodiment.

[0077] The system further comprises:

[0078] A fluorescence detector 20 is provided at the confluence point at the end of the pipeline network 10. The fluorescence detector 20 is configured to detect fluorescent substances in petroleum and determine the location of the pipeline network 10 based on the fluorescent substances. Specifically, in the present embodiment, the fluorescence detector 20 is used to detect the fluorescent substances. It should be noted that the fluorescence detector 20 is always in a detection state. When a pipeline somewhere in the pipeline network 10 is perforated and oil is stolen, the fluorescent substances will enter the petroleum along with the drilling of the perforating equipment. Once the fluorescence detector 20 detects that the petroleum contains fluorescent substances, it indicates that oil theft has occurred.

[0079] When there is drilling and oil theft, the oil thief will drill holes in the oil pipeline. This process will damage the structure of the oil pipeline, causing the fluorescent material in this layer to be broken into powder and enter the interior of the pipeline and flow along with the oil in the pipeline. When the oil containing the fluorescent material reaches the confluence of the main pipes of the oil monitoring station, the fluorescence detector 20 will detect the fluorescent material and determine the properties of the fluorescent material based on the emission spectrum obtained by the detection. By cross-comparing with the pipeline archives, it can be determined which branch pipe has the drilling and oil theft behavior at this time.

[0080] It should be noted that more detailed locations of oil theft through drilling are shown in subsequent embodiments.

[0081] The system further comprises:

[0082] The early warning device 30 is connected to the fluorescence detector 20, and the early warning device 30 is configured to generate an early warning signal according to the position corresponding to the fluorescent substance. Specifically, in the present embodiment, when the fluorescence detector 20 detects the fluorescent substance, the position of the corresponding fluorescent substance is found and sent to the early warning device 30, and the early warning device 30 then starts to generate an early warning signal corresponding to the position of the fluorescent substance.

[0083] Furthermore, in some embodiments, the pipeline network 10 includes several main lines, each of which is connected to several branch lines, different types of first fluorescent substances are added to different main lines, and each branch line of the same main line is added with the first fluorescent substance and the second fluorescent substance corresponding to the main line, and the types of the second fluorescent substances added to each branch line of the same main line are different. Specifically, in the present embodiment, since each section of the pipeline is connected by welding, the preparation materials of different pipelines can be fine-tuned, that is, different types of first fluorescent substances are added to different main lines, and fine-tuned in the preparation materials of the branch lines of the same main line, that is, different second fluorescent substances and the first fluorescent substances of the main line are added to the preparation materials of each branch line of the same main line, and the fluorescent substances corresponding to all main lines and corresponding branch lines are compiled, so that the approximate position of the pipeline can be determined according to the type of fluorescent substance.

[0084] It should be noted that, considering that there are many branch lines on the same main line and the types of fluorescent substances are limited, the branch lines of different main lines can use the same type of the second fluorescent substance.

[0085] Furthermore, in some embodiments, the fluorescence detector 20 is further configured as:

[0086] When the first fluorescent substance is detected, determining whether the second fluorescent substance is detected;

[0087] If not, determining the corresponding main circuit according to the spectrum of the first fluorescent substance;

[0088] If so, the corresponding branch line on the corresponding main line is determined according to the spectrum of the second fluorescent substance and the spectrum of the first fluorescent substance.

[0089] Specifically, in the present embodiment, based on the above-mentioned adjustment of adding fluorescent substances in the main line and the branch line, the present embodiment further designs the function of the fluorescence detector 20, that is, when the first fluorescent substance is detected, it is determined whether the second fluorescent substance is detected. Since the first fluorescent substance and the second fluorescent substance are added to the branch line at the same time, it is possible to determine whether oil theft by drilling occurs in the branch line by detecting the second fluorescent substance while detecting the first fluorescent substance, thereby further improving the accuracy of the early warning of oil theft by drilling.

[0090] It should be noted that the fluorescence detector 20 detects the spectrum of the fluorescent substance to distinguish the type of the fluorescent substance. If there is no consideration of the branch line, the fluorescence detector 20 can be set to have only the function of detecting the fluorescent substance.

[0091] Furthermore, in some embodiments, the content of the first fluorescent substance added in the same main line decreases step by step along the direction of oil transportation, and the content of the second fluorescent substance added in each branch line decreases step by step along the direction of oil transportation. Each main line has several sections, and each branch line has several sections. Specifically, in this embodiment, considering that the pipeline lengths of some main lines and / or branch lines are relatively long, and the difficulty of finding leaks after early warning for longer pipelines is also relatively large, therefore, in this embodiment, the fluorescent substances in the main line and branch line of each section are set to decrease step by step. Since the entire main line or branch line is composed of pipelines in multiple sections, it is achievable to set the content of the fluorescent substance to decrease step by step, and by compiling the content with the pipelines in each section, it is possible to not only identify the pipeline position by the type of fluorescent substance, but also to further determine which section of the pipeline in the entire pipeline has been perforated and oil stolen by the content of the fluorescent substance.

[0092] Furthermore, in some embodiments, the fluorescence detector 20 is further configured as:

[0093] When the corresponding main line has been determined, the total content of the first fluorescent substance in the petroleum within a preset time is calculated to obtain first content information;

[0094] Determine a first corresponding section on the corresponding main line according to the first content information;

[0095] When the corresponding branch line on the corresponding main line has been determined, the total content of the second fluorescent substance in the petroleum within a preset time is calculated to obtain second content information;

[0096] A second corresponding section of the corresponding branch line on the corresponding main line is determined according to the second content information.

[0097] Specifically, in this embodiment, based on the adjustment of the content of fluorescent substances in the main line and the branch line in the above embodiment, this embodiment further designs the function of the fluorescence detector 20, that is, when the main line has been determined and the second fluorescent substance has not been detected, the total content of the first fluorescent substance in the petroleum flowing through a certain period of time is detected, and the corresponding section of the corresponding main line is found through the first content information; when the branch line on the main line has been determined, the total content of the second fluorescent substance in the petroleum within a certain flow is detected, and the corresponding section of the corresponding branch line is found through the second content information, so as to further improve the accuracy of the early warning of oil theft by drilling.

[0098] The alarm device 30 is further configured to generate alarm information according to the corresponding main line, the corresponding branch line, the first corresponding section and / or the second corresponding section.

[0099] Figure 3 The present invention is a flowchart of an oil pipeline early warning method for this application.

[0100] See also Figure 3 It can be seen that, further, this embodiment also provides an oil pipeline early warning method, the method comprising:

[0101] S100, detects fluorescent substances in petroleum and generates fluorescent substance information;

[0102] S200, determining a corresponding position in a pipeline network according to the fluorescent substance information;

[0103] S300, issuing an early warning according to the location.

[0104] Specifically, in this embodiment, oil is monitored in real time, and when fluorescent substances exist in the oil, information of the fluorescent substances is extracted, which can be understood as the spectrum of the fluorescent substances. The corresponding pipeline section in the pipeline network is found through the fluorescent substance information, and an early warning is issued for the section.

[0105] Furthermore, in some embodiments, the pipeline network has a plurality of main lines, and different types of first fluorescent substances are added to different main lines.

[0106] Example of the first method:

[0107] When a first fluorescent substance is detected, a spectrum of the first fluorescent substance is acquired; a corresponding main line is determined according to the spectrum of the first fluorescent substance; and an early warning is issued to a pipeline where the corresponding main line is located.

[0108] Specifically, in this embodiment, the pipeline network is divided into several main lines, and different types of the first fluorescent substance are added to each main line. When the first fluorescent substance is detected, the spectrum of the first fluorescent substance is extracted, and the corresponding main line is found through the spectrum of the first fluorescent substance, so that the corresponding main line can be warned.

[0109] Furthermore, in some embodiments, each of the main lines is connected to a number of branch lines, and each branch line of the same main line is added with the first fluorescent substance and the second fluorescent substance corresponding to the main line, and each branch line of the same main line has a different type of the second fluorescent substance added.

[0110] Example of the second method:

[0111] When the first fluorescent substance is detected, it is determined whether the second fluorescent substance is detected; if so, the corresponding branch line is determined according to the spectrum of the second fluorescent substance and the spectrum of the first fluorescent substance, and an early warning is issued to the pipeline where the corresponding branch line is located on the corresponding main line.

[0112] Specifically, in this embodiment, the pipeline network is further divided into several branch lines, each main line is connected to several branch lines, and in addition to adding the first fluorescent substance corresponding to the main line to the branch line, the corresponding second fluorescent substance is also added therein, so that multiple branch lines on the same main line can be distinguished, and the corresponding branch line can be determined by detecting the spectrum of the second fluorescent substance, and the corresponding branch line can be warned.

[0113] Furthermore, in some embodiments, the content of the first fluorescent substance added in the same main line decreases step by step along the oil transportation direction, and each main line has several sections.

[0114] Example of the third method:

[0115] When the corresponding main line has been determined, the total content of the first fluorescent substance in the petroleum within a preset time is calculated to obtain first content information; the first corresponding section on the corresponding main line is determined according to the first content information; and an early warning is issued to the pipeline where the first corresponding section on the corresponding main line is located.

[0116] Specifically, in this embodiment, each section on the same main line is set as a pipeline containing different contents of the first fluorescent substance, and the content of the first fluorescent substance in the petroleum is calculated over a period of time, and the specific corresponding section on the main line is determined by the content.

[0117] Furthermore, in some embodiments, the content of the second fluorescent substance added in each branch line decreases step by step along the oil transportation direction, and each branch line has a plurality of sections.

[0118] Example of the fourth method:

[0119] When the corresponding branch line on the corresponding main line has been determined, the total content of the second fluorescent substance in the petroleum within a preset time is calculated to obtain second content information; the second corresponding section of the corresponding branch line on the corresponding main line is determined according to the second content information; and an early warning is issued to the pipeline where the second corresponding section of the corresponding branch line on the corresponding main line is located.

[0120] Specifically, in this embodiment, each section on each branch line is set as a pipeline containing different contents of the second fluorescent substance, and the content of the second fluorescent substance in the oil is calculated over a period of time, and the specific corresponding section on the branch line is determined by the content.

[0121] This embodiment has the following advantages:

[0122] It can timely discover the crime of drilling and stealing oil, and reduce the economic losses caused by oil theft.

[0123] There is no need to conduct full coverage pipeline inspections on the entire pipeline on a long-term basis, which greatly saves manpower and material resources.

[0124] It can more specifically determine the location of the pipeline where the drilling and oil theft occurred, greatly improving the efficiency of subsequent pipeline repairs.

Claims

1. An oil pipeline early warning system, the system comprising a pipeline network (10) composed of multiple sections of oil pipelines, the pipeline network (10) comprising an inner lining layer (1), the inner lining layer (1) directly contacts oil, a fluorescent substance being added to the preparation material of the inner lining layer (1); a base material layer (2), the base material layer (2) being wrapped around the outer wall of the inner lining layer (1); and an outer protective layer (3), the outer protective layer (3) being wrapped around the outer wall of the base material layer (2). It is characterized in that The system further comprises: a fluorescence detector (20) disposed at a gathering point at the end of the pipeline network (10), the fluorescence detector (20) being configured to detect fluorescent substances in petroleum and determine the location of the pipeline network (10) based on the fluorescent substances; An early warning device (30), the early warning device (30) being connected to the fluorescence detector (20), the early warning device (30) being configured to generate an early warning signal according to a position corresponding to the fluorescent substance; The pipeline network (10) comprises a plurality of main lines, each of the main lines being connected to a plurality of branch lines, different types of first fluorescent substances being added to different main lines, each branch line of the same main line being added with the first fluorescent substance and the second fluorescent substance corresponding to the main line, and different types of second fluorescent substances being added to each branch line of the same main line; The content of the first fluorescent substance added in the same main line decreases step by step along the direction of oil transportation, and the content of the second fluorescent substance added in each branch line decreases step by step along the direction of oil transportation. Each main line has several sections, and each branch line has several sections.

2. The oil pipeline early warning system according to claim 1, It is characterized in that ； The fluorescence detector (20) is also configured as: When the first fluorescent substance is detected, determining whether the second fluorescent substance is detected; If not, determining the corresponding main circuit according to the spectrum of the first fluorescent substance; If so, the corresponding branch line on the corresponding main line is determined according to the spectrum of the second fluorescent substance and the spectrum of the first fluorescent substance.

3. The oil pipeline early warning system according to claim 2, It is characterized in that The fluorescence detector (20) is also configured as: When the corresponding main line has been determined, the total content of the first fluorescent substance in the petroleum within a preset time is calculated to obtain first content information; Determine a first corresponding section on the corresponding main line according to the first content information; When the corresponding branch line on the corresponding main line has been determined, the total content of the second fluorescent substance in the petroleum within a preset time is calculated to obtain second content information; A second corresponding section of the corresponding branch line on the corresponding main line is determined according to the second content information.

4. The oil pipeline early warning system according to claim 3, It is characterized in that The early warning device (30) is also configured to: Early warning information is generated according to the corresponding main line, the corresponding branch line, the first corresponding section and / or the second corresponding section.

5. A method for early warning of oil pipelines, It is characterized in that The method is applicable to the oil pipeline early warning system according to any one of claims 1 to 4, and the method comprises: Detect fluorescent substances in petroleum and generate fluorescent substance information; The corresponding position in the pipeline network is determined according to the fluorescent substance information; the pipeline network has a plurality of main lines, and different types of first fluorescent substances are added to different main lines; each of the main lines is connected to a plurality of branch lines, and each branch line of the same main line is added with the first fluorescent substance and the second fluorescent substance corresponding to the main line, and the types of the second fluorescent substances added to each branch line of the same main line are different; the content of the first fluorescent substance added to the same main line decreases step by step along the direction of oil transportation, and each main line has a plurality of sections; the content of the second fluorescent substance added to each branch line decreases step by step along the direction of oil transportation, and each branch line has a plurality of sections; An early warning is issued according to the location.

6. A petroleum pipeline early warning method according to claim 5, It is characterized in that The method further comprises: When the first fluorescent substance is detected, acquiring a spectrum of the first fluorescent substance; determining a corresponding main circuit according to the spectrum of the first fluorescent substance; An early warning is issued for the pipeline where the corresponding main line is located.

7. A petroleum pipeline early warning method according to claim 6, It is characterized in that The method further comprises: When the first fluorescent substance is detected, determining whether the second fluorescent substance is detected; If so, the corresponding branch line is determined according to the spectrum of the second fluorescent substance and the spectrum of the first fluorescent substance, and an early warning is issued to the pipeline where the corresponding branch line is located on the corresponding main line.

8. A petroleum pipeline early warning method according to claim 7, It is characterized in that The method further comprises: When the corresponding main line has been determined, the total content of the first fluorescent substance in the petroleum within a preset time is calculated to obtain first content information; Determine a first corresponding section on the corresponding main line according to the first content information; An early warning is issued for the pipeline in the first corresponding section on the corresponding main line.

9. A petroleum pipeline early warning method according to claim 8, It is characterized in that The method further comprises: When the corresponding branch line on the corresponding main line has been determined, the total content of the second fluorescent substance in the petroleum within a preset time is calculated to obtain second content information; Determine a second corresponding section of the corresponding branch line on the corresponding main line according to the second content information; An early warning is issued to the pipeline located in the second corresponding section on the corresponding branch line on the corresponding main line.

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