Non-stop online inspection method and device for organic heat carrier pressure pipeline

Abstract

The invention provides a non-stop online inspection method and device for an organic heat carrier pressure pipeline. The method provided by the invention comprises the following steps: determining a first candidate detection position according to the structure of a to-be-detected pressure pipeline; real-time operation information is determined based on the attribute information of the organic heat carrier conveyed by the to-be-tested pressure pipeline and the working condition information of the to-be-tested pressure pipeline; inputting the real-time operation information into a safety performance decay model of the pressure pipeline structure, obtaining a model prediction result based on the attribute information, and screening out an initial detection position from the first candidate detection positions according to the model prediction result; a state image of the initial detection position is obtained through a ray digital imaging technology, the state image is recognized based on a fouling detection standard, and a recognition result of the initial detection position is obtained; and determining the state of the to-be-measured pressure pipeline based on the identification result. The non-stop online inspection method and device for the organic heat carrier pressure pipeline are used for accurately and reliably completing online inspection of the organic heat carrier pressure pipeline.

Description

Technical Field

[0001] The present application relates to the field of special equipment detection technology, and in particular to a method, device and equipment for non-stop online inspection of an organic heat carrier pressure pipeline. Background Art

[0002] With the rapid development of industrialization, organic heat carriers, as important heat transfer media, are widely used in petrochemical, biopharmaceutical and other industries due to their uniform heating, accurate temperature control, and ability to generate high temperature under low pressure. However, in high-temperature and high-pressure working environments, the safe operation of organic heat carrier pressure pipelines faces severe challenges. Traditional pipeline inspection methods often need to be carried out in a shutdown state. During operation, the temperature of the organic heat carrier is generally 200-400 °C, and this environment may cause expansion, deformation and corrosion of the material, while the high-pressure environment may cause stress concentration and fatigue damage to the pipeline, which will affect the reliability and safety of the pipeline and increase its detection difficulty. Once a leak occurs, there is a risk of burns due to the high surface temperature, and it is very easy to cause fire hazards, resulting in casualties and property losses.

[0003] Therefore, in order to regularly complete the inspection of organic heat carrier pressure pipelines, a team of highly qualified personnel with professional training and relevant technologies is required to operate and use professional equipment and instruments, which increases the cost and difficulty of regular inspections. At the same time, regular inspections need to be carried out during the period when the pipeline is stopped. During the inspection period, the insulation layer of the organic heat carrier pressure pipeline needs to be removed and the organic heat carrier material needs to be emptied. The cycle is long, which will affect the production progress of the enterprise and cause huge economic losses.

[0004] In summary, the inspection of existing organic heat carrier pressure pipelines is not only difficult, but also requires comprehensive consideration of factors such as high temperature and high pressure environment, material properties, pipeline structure layout, and the technical level of inspection equipment and personnel, resulting in low inspection efficiency and difficulty in meeting the needs of online non-stop inspection. Summary of the invention

[0005] In view of this, the present application provides a method and device for online inspection of an organic heat carrier pressure pipeline without stopping the machine, so as to accurately and reliably complete the online inspection of the organic heat carrier pressure pipeline.

[0006] Specifically, the present application is implemented through the following technical solutions: In a first aspect, the present application provides a method for online inspection of an organic heat carrier pressure pipeline without stopping the machine, the method comprising: Determine a first candidate detection position according to the structure of the pressure pipeline to be tested; Determining real-time operation information based on the property information of the organic heat carrier transported by the pressure pipeline to be tested and the operating condition information of the pressure pipeline to be tested; Inputting the real-time operation information into a pressure pipeline structural safety performance decay model, obtaining a model prediction result based on the attribute information, and selecting an initial detection position from the first candidate detection positions according to the model prediction result, the pressure pipeline structural safety performance decay model is used to predict the change law of corrosion conditions at various positions of the pressure pipeline to be tested over time; Obtaining a state image of the initial detection position by using a radiographic digital imaging technique, identifying the state image based on a contamination detection standard, and obtaining an identification result of the initial detection position; The state of the pressure pipeline to be tested is determined based on the identification result.

[0007] The second aspect of the present application provides an on-line inspection device for an organic heat carrier pressure pipeline without stopping the machine, the device comprising a determination module, a screening module and an identification module; wherein: The determination module is used to determine the first candidate detection position according to the structure of the pressure pipeline to be tested; The determination module is further used to determine the real-time operation information based on the property information of the organic heat carrier transported by the pressure pipeline to be tested and the working condition information of the pressure pipeline to be tested; The screening module is used to input the real-time operation information into the pressure pipeline structure safety performance decay model, obtain the model prediction result based on the attribute information, and screen the initial detection position from the first candidate detection position according to the model prediction result. The pressure pipeline structure safety performance decay model is used to predict the change law of the corrosion condition of each position of the pressure pipeline to be tested over time; The recognition module is used to obtain a state image of the initial detection position by using a radiographic digital imaging technique, recognize the state image based on a contamination detection standard, and obtain a recognition result of the initial detection position; The determination module is further used to determine the state of the pressure pipeline to be tested based on the identification result.

[0008] The third aspect of the present application provides an on-line inspection device for an organic heat carrier pressure pipeline without stopping, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any one of the methods provided in the first aspect of the present application are implemented.

[0009] The fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the methods provided in the first aspect of the present application.

[0010] The method and device for online inspection of organic heat carrier pressure pipelines without stopping provided in the present application preliminarily determine the first candidate detection position that is prone to problems based on the structural characteristics of the pressure pipeline to be tested, laying a solid foundation for subsequent detection work. Furthermore, by collecting and analyzing the property information of the transported organic heat carrier and the operating condition information of the pipeline, the operating status of the pressure pipeline to be tested that is currently of concern is mastered, providing a scientific basis for the subsequent model to determine the accurate position. Furthermore, the pressure pipeline structural safety performance decay model can simulate the changes in the pipeline based on the currently acquired information of the organic heat carrier and the information of the pressure pipeline to be tested, so that the change law of the corrosion situation at each position of the pipeline over time can be accurately predicted, so as to accurately screen out the initial detection position that needs to be focused on from the first candidate detection position, greatly improving the pertinence and effectiveness of the detection of the pressure pipeline to be tested. At the same time, combined with the structure of the pressure pipeline to be tested, the position where the pressure pipeline to be tested is prone to problems can be determined. In this way, combined with the actual data of the organic heat carrier, the interaction between the two can be simulated. On the one hand, the corrosion caused by the operation of the pipeline so far is considered, that is, the current state of the pipeline is evaluated to make the first position selection. On the other hand, according to the properties of the material currently required to be transported, the situation that will occur during the transmission is predicted, and the final position is selected from the first position selection. The position to be tested is photographed in combination with the current situation and the predicted situation, which reduces the workload of shooting and helps to comprehensively and accurately locate the position of the pressure pipeline to be tested. Further, the use of X-ray digital imaging technology for detailed detection can complete the detection of the pressure pipeline to be tested without stopping the machine, preventing the impact of shutdown on the work of the pressure pipeline to be tested. At the same time, X-ray digital imaging technology has the advantages of high detection sensitivity, intuitive and reliable results, etc. It can clearly present the state image of the key parts of the pipeline. Through the identification results, it can accurately judge the corrosion, cracks and other defects of the pressure pipeline to be tested, which provides strong support for the subsequent determination of the state of the pressure pipeline to be tested. In this way, the accurate initial detection position is obtained through scientific prediction and screening, and the accurate identification result is determined through high-quality X-ray digital imaging technology, which can reliably and effectively complete the status detection of the pressure pipeline to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A flow chart of Example 1 of the method for online inspection of an organic heat carrier pressure pipeline without stopping the machine provided in the present application; Figure 2 This is a flow chart of Example 2 of the method for online inspection of an organic heat carrier pressure pipeline without stopping the machine provided in this application; Figure 3 A hardware structure diagram of the organic heat carrier pressure pipeline non-stop online inspection device where the organic heat carrier pressure pipeline non-stop online inspection device of the present application is located; Figure 4This is a structural schematic diagram of Embodiment 1 of the non-stop online inspection device for an organic heat carrier pressure pipeline provided in the present application. DETAILED DESCRIPTION

[0012] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0013] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0014] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0015] The present application provides a method and device for online inspection of an organic heat carrier pressure pipeline without stopping the machine, which are used to accurately and reliably complete the online inspection of the organic heat carrier pressure pipeline.

[0016] Specific embodiments are given below to introduce the technical solution of the present application in detail.

[0017] Figure 1 This is a flow chart of Example 1 of the method for online inspection of organic heat carrier pressure pipeline without stopping the machine provided in this application. Figure 1 , the method provided in this embodiment may include: S101. Determine a first candidate detection position according to the structure of the pressure pipeline to be tested.

[0018] Specifically, the pressure pipeline to be tested is an organic heat carrier pressure pipeline that needs to be tested and evaluated. The pressure pipeline to be tested is used to transport organic heat carriers to transfer heat. The pressure pipeline to be tested works in a special environment (high temperature and high pressure environment), and the pressure pipeline to be tested has a complex structure (including elbows, brackets, and welded joints). Its safety and reliability are easily affected, so regular or irregular inspections are required.

[0019] Furthermore, organic heat carrier is a medium used for heat transfer. Organic heat carrier can effectively transfer heat energy in industrial production processes. It usually has physical and chemical properties such as high boiling point, low freezing point, and good thermal stability, which enables them to operate stably under high temperature conditions. It should be noted that compared with traditional inorganic heat carriers (such as water, steam, etc.), organic heat carriers have the characteristics of uniform heating, accurate temperature control, high temperature under low pressure, good heat transfer effect, energy saving, and convenient transportation and operation.

[0020] Furthermore, the specific type of the organic heat carrier can be determined according to actual needs, and is not limited in this embodiment. In specific implementation, the organic heat carrier can include heat transfer oil, biphenyl mixture, etc.

[0021] Furthermore, the structure of the pressure pipeline to be tested is the physical structure and layout of the pressure pipeline to be tested. It should be noted that the specific data type of the structure of the pressure pipeline to be tested that needs to be obtained is determined according to actual needs, and is not limited in this embodiment. In specific implementation, the structure of the pressure pipeline to be tested may include the diameter, wall thickness, length, curvature, weld position, bracket setting and other data that directly affect the performance and detection difficulty of the pipeline.

[0022] Furthermore, the first candidate detection position is a position that may have safety hazards or require special attention, which is preliminarily determined based on the structural characteristics of the pressure pipeline to be tested. It should be noted that the first candidate detection position may include welds, elbows, tees, bracket connections and other locations that are prone to corrosion, cracks, deformation and other defects.

[0023] In specific implementation, it can be determined according to the structure of the pressure pipeline to be tested that the connection at the welding position (i.e., the weld) is the most unstable and most likely to cause pipeline defects. Therefore, the weld can be determined as the first candidate detection position according to the structure of the pressure pipeline to be tested.

[0024] It should be noted that all welds can be determined as the first candidate positions; or all welds with defects can be determined as the first candidate positions based on the inspection results of each weld in historical inspections; or each weld can be scored based on expert experience, and a specified number of welds with the lowest scores can be determined as the first candidate positions.

[0025] A specific embodiment is given below to introduce the process of determining the first candidate detection position in detail: (1) Determine the accumulated working time corresponding to the pressure pipeline to be tested based on the working condition information.

[0026] Specifically, the specific data type included in the working condition information of the pressure pipeline to be tested is determined according to actual needs, and is not limited in this embodiment. In specific implementation, the working condition information of the pressure pipeline to be tested may include a collection of information such as environmental conditions, operating parameters, and load status of the pressure pipeline to be tested during operation. It can be understood that the working condition information is crucial for evaluating the safety performance of the pipeline and predicting its life.

[0027] Specifically, the cumulative working time refers to the total operating time experienced by the pressure pipeline to be tested from the time it was put into operation to the current moment. The cumulative working time is an important indicator for measuring the degree of pipeline usage and assessing the degree of aging.

[0028] In specific implementation, in this step, the data corresponding to the working time in the working condition information is extracted to determine the cumulative working time experienced by the pressure pipeline to be tested from the start of operation to the current moment.

[0029] (2) Using the accumulated working time as monitoring data, determining the fracture-prone area in the structure of the pressure pipeline to be tested.

[0030] Specifically, the fracture-prone area refers to the part in the pressure pipeline to be tested that is prone to fracture or failure due to factors such as material aging, stress concentration, and corrosion. The fracture-prone area is the focus of attention in the pipeline safety performance assessment.

[0031] It is understandable that as the pressure pipeline continues to work, most areas of the pressure pipeline are affected by aging, wear, etc., but can still be used normally, while a small part of the pressure pipeline will have problems such as leakage and fracture, and this part of the area is the easy-to-fracture area. The problem of the easy-to-fracture area is easy to fracture. For example, in one embodiment, the problems that occur in the pressure pipeline after 3 years of operation can be statistically organized as fracture problems, and the area where the fracture problem occurs is determined as the easy-to-fracture area. For another example, in another embodiment, the problems that occur in the pressure pipeline after 8 years of operation can be statistically organized as fracture problems, and the area where the fracture problem occurs is determined as the easy-to-fracture area.

[0032] In specific implementation, based on the structure of the pressure pipeline to be tested, the area where wear has occurred due to the influence of cumulative working time can be determined, and it can be determined as the area most prone to problems and the area prone to fracture; it is also possible to determine the part of the structure that is prone to leakage based on the pressure pipeline to be tested, and determine it as the area prone to fracture.

[0033] (3) Determine the easy-to-break area as the first candidate detection position.

[0034] In a specific implementation, the position of the easily-fractured area corresponding to the pressure pipeline to be tested is determined as the first candidate detection position.

[0035] The present application provides a method for online inspection of an organic heat carrier pressure pipeline without stopping. By accumulating the working time and the structure of the pressure pipeline to be tested, the data that affects the pressure pipeline to be tested can be accurately obtained, and the easily broken area corresponding to the pressure pipeline to be tested can be accurately obtained through analysis. Furthermore, by predetermining the easily broken area as the first candidate detection position, the detection work can be made more centralized and targeted, and potential defects or problems can be discovered and dealt with in a timely manner, thereby avoiding accidents and enhancing the safety of the pressure pipeline to be tested. Furthermore, combined with the accumulated working time and the structure of the pressure pipeline to be tested, the current usage status of the pressure pipeline to be tested can be judged, and the position most prone to defects can be accurately determined as the easily broken area according to the current situation of the pressure pipeline to be tested. In this way, by accurately determining the first candidate detection position, subsequent detections can be guaranteed.

[0036] S102: Determine real-time operation information based on the property information of the organic heat carrier transported by the pressure pipeline to be tested and the operating condition information of the pressure pipeline to be tested.

[0037] Specifically, the property information of the organic heat carrier refers to data or parameters describing the characteristics or state of the organic heat carrier. The property information of the organic heat carrier directly affects the state of the pressure pipeline steel.

[0038] Furthermore, when the parameters of the organic heat carrier exceed the standard, the organic heat carrier is more likely to gel, resulting in overheating in the pressure pipe, which increases the probability of cracks in the pressure pipe. For example, in one embodiment, when the parameters of the organic heat carrier such as kinematic viscosity, moisture, and carbon residue value exceed the standard, the probability of cracks in the pressure pipe increases.

[0039] It should be noted that the specific data type included in the attribute information is determined according to actual needs, and is not limited in this embodiment. In specific implementation, the attribute information of the organic heat carrier may include the physical properties of the organic heat carrier, the chemical properties of the organic heat carrier, and the operating parameters of the organic heat carrier. For example, in one embodiment, the attribute information of the organic heat carrier includes the temperature, pressure, viscosity, composition, acid value, flow rate, and flow rate of the organic heat carrier.

[0040] Furthermore, the working condition information of the pressure pipeline to be tested refers to a collection of information describing the environmental conditions, operating parameters, load status, etc. of the pressure pipeline during operation. This information is crucial for evaluating the safety performance of the pipeline and predicting its life.

[0041] Furthermore, the real-time operation information is information describing the operation status, performance parameters, etc. of the pressure pipeline to be tested at the current moment. The real-time operation information is directly related to the status of the pressure pipeline to be tested, and the status of the pressure pipeline to be tested can be directly determined through the real-time operation information.

[0042] In specific implementation, the property information of the organic heat carrier can be determined by querying the usage record or label corresponding to the pressure pipeline to be tested, and then its working condition information can be determined according to the working data set for the pressure pipeline to be tested, and then the corresponding real-time operation information can be determined.

[0043] Furthermore, the real-time operation information can characterize the corrosion condition of the pressure pipeline. In specific implementation, the internal corrosion condition of the pressure pipeline is determined by the property information of the organic heat carrier, and the external corrosion condition of the pressure pipeline is determined by combining the working condition information of the pressure pipeline. Then, the corrosion condition of the pressure pipeline is determined by combining these two data, which is the real-time operation information.

[0044] Further, according to the corrosion condition in the real-time operation information, a supplementary candidate detection position other than the first candidate detection position in the pressure pipeline to be tested is determined, and the leakage coefficient of the supplementary candidate detection position is greater than a preset threshold, indicating that the position is prone to fracture. The supplementary candidate detection position and the first candidate detection position are combined as the first candidate detection position for screening in step S103.

[0045] S103, inputting the real-time operation information into a pressure pipeline structure safety performance decay model, obtaining a model prediction result based on the attribute information, and selecting an initial detection position from the first candidate detection positions according to the model prediction result. The pressure pipeline structure safety performance decay model is used to predict the change pattern of corrosion conditions at various positions of the pressure pipeline to be tested over time.

[0046] Specifically, the model prediction result is a set of prediction data obtained by processing the real-time operation information by the pressure pipeline structure safety performance decay model. The model prediction result is used to describe the corrosion conditions of various positions of the pressure pipeline to be tested.

[0047] In a specific implementation, the corrosion condition of the pressure pipeline is determined by the model prediction result, and the position with the most serious corrosion condition is determined as the initial detection position. It can be understood that the position corresponding to the model prediction result in the first candidate detection position is the position where defects are most likely to occur in the pressure pipeline to be tested, so it is used as the initial detection position for detection. In a specific implementation, the position corresponding to the model prediction result exceeding the preset corrosion threshold can be determined as the initial detection position.

[0048] A specific embodiment is given below to introduce the process of obtaining the prediction results in detail: (1) Determining a pressure pipeline corrosion variation coefficient based on the corrosion properties of the organic heat carrier and the pressure pipeline to be tested.

[0049] Specifically, during the use of organic heat transfer medium, due to its own chemical properties and physical state, it may cause corrosion to the contacting materials (such as the inner wall of the pressure pipe). This corrosion is the result of the combined action of multiple factors such as the temperature, pressure, flow rate, and chemical composition of the organic heat transfer medium. In other words, the corrosion properties of organic heat transfer medium are a set of characteristics that describe its corrosion ability or tendency.

[0050] Furthermore, the pressure pipeline corrosion variation coefficient is used to quantitatively describe the change in corrosion rate or corrosion degree of the pressure pipeline under specific conditions.

[0051] In specific implementation, the pressure pipeline corrosion variation coefficient of the current organic heat carrier on the pressure pipeline is calculated according to the difference between the corrosion properties and the corresponding standard corrosion related values ​​in the pressure pipeline structure safety performance decay model.

[0052] (2) Determining a temperature variation coefficient of a pressure pipeline based on a delivery temperature of the organic heat carrier.

[0053] Specifically, the delivery temperature of the organic heat carrier refers to the temperature reached when the organic heat carrier is transported in the pressure pipe. It should be noted that the delivery temperature of the organic heat carrier is usually high. In specific implementation, the delivery temperature of the organic heat carrier can range from 200-400°C.

[0054] Furthermore, the temperature variation coefficient of the pressure pipeline is used to describe the changes in parameters such as material properties, structural strength or corrosion rate of the pressure pipeline at different temperatures.

[0055] In specific implementation, the temperature information of the organic heat carrier during transmission in the pressure pipeline is used to calculate the pressure pipeline temperature change coefficient of the current organic heat carrier on the pressure pipeline according to the difference between the transmission temperature and the corresponding standard temperature-related value in the pressure pipeline structure safety performance decay model.

[0056] (3) The pressure pipeline structural safety performance decay model is adjusted according to the corrosion variation coefficient and the temperature variation coefficient to obtain a target decay model of the pressure pipeline to be tested.

[0057] Specifically, the pressure pipeline structure safety performance decay model is a standard model before adjustment. In other words, the pressure pipeline structure safety performance decay model is trained based on the data of all pressure pipelines. The parameters in the pressure pipeline structure safety performance decay model can be the mean of all pipelines. The pressure pipeline structure safety performance decay model includes the correspondence between the working time and the corrosion condition of all pressure pipelines when transporting all organic heat carriers.

[0058] In specific implementation, the corrosion variation coefficient and the temperature variation coefficient are input into the pressure pipeline structure safety performance decay model to obtain a target decay model corresponding to the pressure pipeline to be tested.

[0059] It can be understood that by determining the pressure pipeline corrosion variation coefficient with the property information of the organic heat carrier actually used and determining the pressure pipeline temperature variation coefficient with the actual working delivery temperature, the target decay model can be made specific to the current situation. Through this customized target decay model, accurate prediction results can be obtained.

[0060] It should be noted that the target decay model is a model adjusted and optimized for the pressure pipeline to be tested by comprehensively considering its corrosion variation coefficient, temperature variation coefficient and other influencing factors. In other words, the target decay model can more accurately reflect the state decay law of the pressure pipeline to be tested.

[0061] (4) Obtaining a model prediction result based on the target decay model and the real-time operation information.

[0062] In specific implementation, the real-time operation information is input into the target decay model, and the corresponding model prediction results are obtained through the target decay model processing.

[0063] It should be noted that after the real-time operation information is input into the target decay model, the target decay model can calculate the area with the most serious corrosion of the current pressure pipeline for the pressure pipeline that has been in operation. In other words, since the pressure pipeline is a pipeline that has been in operation for a long time, the simulation starting state of the target decay model is determined based on the real-time operation information.

[0064] It should be noted that the model prediction results are obtained by analyzing the specificity of the pressure pipeline to be tested and the accumulated corrosion conditions of the pressure pipeline over the working time.

[0065] The non-stop online inspection method for organic heat carrier pressure pipelines provided in the present application can accurately determine the corrosion variation coefficient of the pressure pipeline to be tested by comprehensively considering the corrosion properties of the organic heat carrier and the material properties, structural characteristics and use environment of the pressure pipeline to be tested. Furthermore, based on the delivery temperature of the organic heat carrier, the temperature variation coefficient of the pressure pipeline to be tested is scientifically set using theories and methods such as thermal stress analysis and material performance changes, and the characteristics of the pressure pipeline to be tested in a high-temperature operating environment can be accurately obtained. In this way, the original pressure pipeline structural safety performance decay model is adjusted and optimized in combination with the corrosion variation coefficient and the temperature variation coefficient, which can fully consider the various influencing factors of the pressure pipeline to be tested in actual operation, so that the prediction results are closer to the actual operating conditions, which helps to improve the reliability of subsequent detection.

[0066] A specific embodiment is given below to introduce in detail the process of obtaining the corrosion state of the pressure pipeline to be tested: (1) estimating a delivery time of the organic heat carrier based on the real-time operation information.

[0067] Specifically, the transport time is the time required for the organic heat carrier to complete its transport task in the pressure pipeline from a specific moment.

[0068] In specific implementation, the time to transport all the organic heat carriers can be determined based on the total amount of organic heat carriers to be transported and the efficiency of transporting the organic heat carriers by the pressure pipeline to be tested, based on the ratio of the total amount of organic heat carriers to the organic heat carrier transport efficiency, and determined as the transport time.

[0069] (2) Inputting the real-time operation information into the target decay model to predict the corrosion state of the pressure pipeline to be tested from the current time to the end time of the transportation time.

[0070] In this step, the target decay model is constrained by the delivery time. The target decay model predicts the corrosion state of the pressure pipeline to be tested during the period from delivery time to the end of the delivery time through calculation and simulation. In specific implementation, the time when the pressure pipeline starts to transport the organic heat carrier can be determined as the current moment, and the delivery time is superimposed on the current moment to obtain the end time of the delivery time. The corrosion state of the pressure pipeline to be tested after the delivery time is predicted by the target decay model; the working pressure pipeline to be tested can also be detected to obtain real-time operation information, determine the real-time corrosion status of the pressure pipeline to be tested, and superimpose the remaining delivery time to be worked, and predict the corrosion state of the pressure pipeline to be tested after the delivery time.

[0071] The present application provides a method for online inspection of an organic heat carrier pressure pipeline without stopping, which can predict in real time the corrosion state of the pressure pipeline to be tested from the current moment to the end of the transportation time, and can make targeted predictions for the pressure pipeline to be tested through the dynamic prediction capability of the model.

[0072] S104, obtaining a state image of the initial detection position by using a radiographic digital imaging technique, identifying the state image based on a contamination detection standard, and obtaining an identification result of the initial detection position.

[0073] Specifically, Digital Radiography (DR) is a non-destructive testing technology that uses X-rays or gamma rays to penetrate the object being inspected, receives the penetrating rays through a digital detector and converts them into digital images, thereby realizing the detection of the internal structure of the object being inspected.

[0074] In specific implementation, the initial detection position is detected by using the X-ray digital imaging technology to obtain a corresponding state image, and the information of the initial detection position can be clearly displayed through the state image.

[0075] It should be noted that the state image obtained by the X-ray digital imaging technology can be a negative film directly formed in the digital imaging plate.

[0076] Furthermore, the contamination detection standard refers to a standard or specification used to evaluate and judge whether there are defects on the status image, the type, size, location of the defects, etc. The contamination detection standard is formulated based on industry standards, technical specifications and experience summary.

[0077] A specific embodiment is given below to introduce in detail the process of obtaining the optimized detection position: (1) Determine a candidate location point according to the maintenance status of the pressure pipeline to be tested.

[0078] Specifically, the maintenance status of the pressure pipeline to be tested is recorded each time it is repaired. In specific implementation, the maintenance report of the pressure pipeline to be tested can be queried to determine the maintenance status of the pressure pipeline to be tested.

[0079] Furthermore, a position where the pressure pipeline to be tested has been repaired in the repair state is determined as a candidate position point.

[0080] (2) Selecting candidate locations from the candidate locations according to the organic heat carrier property information and the real-time detection information.

[0081] Specifically, the attribute information reflects the influence of the organic heat carrier on the pressure pipeline to be tested, and the position where defects are most likely to occur at each candidate position point is determined in combination with the real-time detection information, and is determined as the candidate position point.

[0082] (3) The initial detection position and the candidate position point are used as the optimized detection position.

[0083] Specifically, both the initial detection position and the candidate position points are set as optimized detection positions.

[0084] (4) Obtaining a status image of the optimized detection position by using the X-ray digital imaging technology, identifying the status image based on a contamination detection standard, and obtaining an identification result of the optimized detection position.

[0085] Specifically, the optimized detection position is detected to obtain a corresponding state image, and then the recognition result is obtained in combination with the contamination detection standard.

[0086] The non-stop online inspection method for the organic heat carrier pressure pipeline provided in the present application preliminarily determines the candidate location points through the maintenance status of the pressure pipeline to be tested, because the candidate location points are areas in the pressure pipeline to be tested where defects may exist or need to be focused on. Furthermore, more accurate candidate location points are screened out from the candidate location points in combination with the attribute information of the organic heat carrier and the real-time detection information, ensuring the accuracy and pertinence of the candidate location points and improving the detection efficiency. Furthermore, by detecting the optimized detection position through X-ray digital imaging technology, a high-definition status image can be quickly obtained, which can clearly show the internal structure of the pipeline, welds and possible defects, and improve the accuracy and reliability of the detection.

[0087] S105. Determine the state of the pressure pipeline to be tested based on the identification result.

[0088] Specifically, the overall operation status of the pressure pipeline to be tested at the time of detection is determined according to the identification result. It should be noted that the specific data type included in the status of the pressure pipeline to be tested is determined according to actual needs, and is not limited in this embodiment. In specific implementation, the pressure pipeline to be tested may include whether the pressure pipeline to be tested has defects, the type and severity of the defects, etc.

[0089] A specific embodiment is given below to introduce in detail the process of determining the state of the pressure pipeline to be tested: (1) Obtaining a contamination detection standard corresponding to the pressure pipeline to be tested; the contamination detection standard represents the association between different identification results and multiple safety levels.

[0090] Specifically, the contamination detection standard refers to the standardized basis for evaluating the internal state or severity of defects in organic heat carrier pressure pipelines. The contamination detection standard specifies the relationship between different defect types, sizes, locations and other factors and pipeline safety levels, providing inspectors with clear standards for judging pipeline conditions.

[0091] In specific implementation, KGB / T19624-2019 "Safety Assessment of Defective Pressure Vessels in Use" can be used as the contamination detection standard.

[0092] (2) Converting the identification result based on the contamination detection standard to obtain the current safety level, and determining the state of the pressure pipeline to be tested based on the safety level.

[0093] Specifically, the identification result is input into the contamination detection standard to obtain the safety level corresponding to the identification result, and the state of the pressure pipeline to be tested is determined according to the state corresponding to the safety level recorded in the contamination detection standard.

[0094] The non-stop online inspection method for organic heat carrier pressure pipelines provided in this application provides a clear and standardized basis for the evaluation of identification results by obtaining and applying the contamination detection standard. It helps to reduce the subjectivity and uncertainty in the evaluation process and improve the accuracy and reliability of the evaluation results. Furthermore, the identification results are converted into safety levels, which can intuitively reflect the safety performance status of the pressure pipeline to be tested at a specific detection time, and help to quickly understand the safety status of the pipeline. In this way, accurate detection of the pressure pipeline to be tested can be completed.

[0095] A specific embodiment is given below to introduce in detail the steps after the pressure pipeline to be tested is tested: (1) When the safety level exceeds a preset level, the pressure pipeline to be tested is re-inspected to obtain a re-inspection result; the re-inspection is completed based on phased array ultrasonic testing.

[0096] Specifically, the specific content of the preset level is determined according to actual needs, and is not limited in this embodiment. In specific implementation, the second level security level can be determined as the preset level.

[0097] Furthermore, when the safety level exceeds a preset level, there may be a problem with the pressure pipeline to be tested, and therefore it is necessary to shut down and conduct further re-inspection to more accurately determine the status of the pressure pipeline to be tested.

[0098] In specific implementation, phased array ultrasonic testing technology (PAUT for short) may be used to re-inspect the pressure pipeline to be tested.

[0099] (2) Correcting the identification result based on the re-inspection result and re-determining the state of the pressure pipeline to be tested.

[0100] In specific implementation, the re-examination result can be directly used as a new recognition result, or the re-examination result can be integrated with the recognition result to obtain a new recognition result.

[0101] Furthermore, after the correction of the recognition result is completed, the state of the pressure pipeline to be tested is determined according to the corrected recognition result.

[0102] Furthermore, when it is determined that there is a problem with the pressure pipeline to be tested, the pressure pipeline is repaired or polished according to the specifications of the pressure pipeline. In specific implementation, when there is a problem with the weld of the pressure pipeline, it can be re-welded and polished to a certain width and a metallic luster.

[0103] The organic heat carrier pressure pipeline non-stop online inspection method provided by the present application can further confirm the accuracy of the preliminary inspection results through the re-inspection process and the use of phased array ultrasonic detection, thereby reducing the possibility of misjudgment and missed detection. Furthermore, the state of the pressure pipeline to be tested is re-determined based on the re-inspection results, which can provide more accurate and comprehensive information for the formulation of maintenance decisions. In this way, the accuracy of the organic heat carrier pressure pipeline inspection is optimized and improved through re-inspection.

[0104] Compared with the traditional shutdown detection method, the non-stop online inspection method for organic heat carrier pressure pipelines provided in this application realizes non-stop online detection, greatly shortens the detection cycle, not only reduces shutdown losses, but also improves the accuracy of detection, and provides a strong guarantee for the continuous operation of the enterprise. Furthermore, based on a large amount of detection data and theoretical analysis, a mathematical model of the decay of the safety performance of organic heat carrier pressure pipelines is established. The model can accurately reflect the state changes of the pipeline over time under different working conditions, and provides a scientific basis for determining the detection position. In this way, the state of the pressure pipeline to be tested can be accurately and reliably obtained through the detection of X-ray digital imaging technology.

[0105] Figure 2 This is a flow chart of Example 2 of the method for online inspection of organic heat carrier pressure pipeline without stopping the machine provided in this application. Figure 2 , the method for constructing the structural safety performance decay model comprises: S201. Selecting working parameters of a plurality of pressure pipelines based on a research object database; the working parameters at least include temperature dimensions and pressure dimensions corresponding to the plurality of pressure pipelines.

[0106] Specifically, the research object database is a database that stores information related to the organic heat carrier pressure pipeline. The data in the research object database includes but is not limited to the basic information, operation data, detection data, etc. of the pipeline.

[0107] In specific implementation, all data generated during all processes of use and inspection of the pressure pipeline can be stored in the research object database.

[0108] Furthermore, working parameters refer to data describing various performance indicators of pressure pipelines during operation. For organic heat carrier pressure pipelines, they usually include temperature, pressure, etc. In specific implementation, data of temperature and pressure dimensions corresponding to different working temperatures and pressures of pressure pipelines can be obtained from the research object database.

[0109] S202: Acquire the quality data of each of the pressure pipelines at different times in the historical working data, and generate training samples in combination with the working parameters.

[0110] Specifically, historical working data refers to various data records generated during the normal operation of the pressure pipeline in the past period of time. It should be noted that historical working data can be stored in a database or record file and retrieved when needed for analysis, monitoring and prediction.

[0111] Furthermore, the quality data is data reflecting the quality characteristics of the pressure pipeline such as material performance, structural integrity, corrosion resistance, etc. during the operation of the pressure pipeline. It is understandable that the state of the pressure pipeline at different times can be determined based on the quality data.

[0112] In specific implementation, in this step, the quality data is combined with the corresponding working parameters to form a complete set of training samples. The training samples contain the association relationship between different working parameters and quality data.

[0113] It should be noted that when obtaining quality data and working parameters, data can be obtained from multiple identical devices, so that the obtained training samples can be more targeted to the type of device.

[0114] S203, training a benchmark model based on the training samples to obtain the structural safety performance decay model; the trained structural safety performance decay model characterizes the correlation between the quality, temperature and pressure of the pressure pipeline and the changes over time.

[0115] Specifically, the benchmark model is a simple model that has achieved certain effects but can be further optimized. In specific implementation, the model type of the benchmark model can be determined according to actual needs, and this is not limited in this embodiment.

[0116] In the specific implementation, the benchmark model is trained based on the training samples, and a structural safety performance decay model that can characterize the change of the pressure pipeline status with the working time is obtained. It can be understood that since the training samples contain the quality data of the pressure pipeline changing with time at different temperatures and pressures, the structural safety performance decay model can jointly predict the status of the pressure pipeline based on the three data of the pressure pipeline's working temperature, working pressure, and working time.

[0117] Optionally, after obtaining the structural safety performance decay model, the process of updating the model may include: (1) Generate an update sample by combining the recognition result, the attribute information and the operating condition information, wherein the update sample represents the real-time status of the pressure pipeline at the current moment.

[0118] In specific implementation, after each inspection of the pressure pipeline to be tested is completed, the identification result, the working condition information corresponding to the pressure pipeline to be tested and the property information of the organic heat carrier are combined to obtain an updated sample in which the three are interrelated.

[0119] It should be noted that the property information of the organic heat carrier represents the situation of internal corrosion of the pressure pipeline, and the operating condition information represents the situation of external corrosion of the pressure pipeline.

[0120] It can be understood that, since the updated samples are obtained through real-time detection, they can represent the state of the pressure pipeline to be tested at the current moment.

[0121] (2) Updating the structural safety performance decay model based on the updated sample.

[0122] In specific implementation, the updated samples are input into the structural safety performance decay model to complete the update of the structural safety performance decay model.

[0123] The non-stop online inspection method for organic heat carrier pressure pipelines provided in this application can ensure that the model is always based on the latest data and operating information for prediction by generating updated samples and updating the model in real time, thereby effectively avoiding prediction errors caused by outdated data or changes in operating conditions. At the same time, the updated model can more accurately capture the changing trends in the safety performance of pressure pipelines, providing more reliable support for safety evaluation and early warning. Furthermore, real-time updating of the model enables the model to continuously adapt to new operating conditions and pipeline status changes, improving the adaptability and robustness of the model. When faced with a complex and changing industrial environment, the updated model can respond and adjust more quickly to ensure the effectiveness and reliability of the model.

[0124] The non-stop online inspection method for organic heat carrier pressure pipelines provided in this application determines the performance parameters, service life, working environment and other important information of the pressure pipeline through the research object database, providing a rich data source for model training. Furthermore, the training samples contain at least information in the temperature dimension and the pressure dimension. These data are important indicators reflecting the operating status of the pressure pipeline, which are crucial for the model to understand the pipeline performance decay process. Furthermore, reflecting the status of the pipeline through quality indicators is crucial for the model to understand the pipeline performance decay process. In this way, by using rich training samples, the model can learn the performance change laws of the pressure pipeline under different working conditions, thereby more accurately predicting the safety performance decay trend of the pipeline, and providing strong support for subsequent detection.

[0125] Corresponding to the aforementioned embodiment of a method for online inspection of an organic heat carrier pressure pipeline without stopping the machine, the present application further provides an embodiment of a device for online inspection of an organic heat carrier pressure pipeline without stopping the machine.

[0126] The embodiment of the device for non-stop online inspection of organic heat carrier pressure pipelines in the present application can be applied to non-stop online inspection equipment for organic heat carrier pressure pipelines. The device embodiment can be implemented by software, or by hardware or a combination of software and hardware. Taking software implementation as an example, as a device in a logical sense, it is formed by the processor of the non-stop online inspection equipment for organic heat carrier pressure pipelines in which it is located reading the corresponding computer program instructions in the non-volatile memory into the memory and running them. From the hardware level, if Figure 3 As shown, it is a hardware structure diagram of the organic heat carrier pressure pipeline non-stop online inspection device where the organic heat carrier pressure pipeline non-stop online inspection device of the present application is located. In addition Figure 3 In addition to the processor, memory, network interface, and non-volatile memory shown, the organic heat carrier pressure pipeline non-stop online inspection device where the device in the embodiment is located can also include other hardware according to the actual function of the organic heat carrier pressure pipeline non-stop online inspection device, which will not be described in detail.

[0127] Figure 4 This is a structural diagram of the first embodiment of the non-stop online inspection device for the organic heat carrier pressure pipeline provided by this application. Figure 4 The device provided in this embodiment includes a determination module 410, a screening module 420 and an identification module 430; wherein, The determination module 410 is used to determine the first candidate detection position according to the structure of the pressure pipeline to be tested; The determination module 410 is further used to determine the real-time operation information based on the property information of the organic heat carrier transported by the pressure pipeline to be tested and the working condition information of the pressure pipeline to be tested; The screening module 420 is used to input the real-time operation information into the pressure pipeline structure safety performance decay model, obtain the model prediction result based on the attribute information, and screen the initial detection position from the first candidate detection position according to the model prediction result. The pressure pipeline structure safety performance decay model is used to predict the change law of the corrosion condition of each position of the pressure pipeline to be tested over time; The identification module 430 is used to obtain a state image of the initial detection position by using a radiographic digital imaging technique, identify the state image based on a contamination detection standard, and obtain an identification result of the initial detection position; The determination module 410 is further configured to determine the state of the pressure pipeline to be tested based on the identification result.

[0128] The device of this embodiment can be used to perform Figure 1 The steps, specific implementation principles and implementation processes of the method embodiment shown are similar and will not be repeated here.

[0129] Optionally, the screening module 420 is specifically used to determine the pressure pipeline corrosion variation coefficient according to the corrosion properties of the organic heat carrier and the pressure pipeline to be tested; The screening module 420 is further specifically used to determine the temperature variation coefficient of the pressure pipeline based on the delivery temperature of the organic heat carrier; The screening module 420 is further specifically used to adjust the pressure pipeline structure safety performance decay model according to the corrosion variation coefficient and the temperature variation coefficient to obtain a target decay model of the pressure pipeline to be tested; The screening module 420 is further specifically configured to obtain a model prediction result based on the target decay model and the real-time operation information.

[0130] Optionally, the screening module 420 is further specifically used to estimate the delivery time of the organic heat carrier based on the real-time operation information; The screening module 420 is further specifically used to input the real-time operation information into the target decay model to predict the corrosion state of the pressure pipeline to be tested from the current moment to the end moment of the delivery time.

[0131] Optionally, the identification module 430 is further used to determine the candidate location point according to the maintenance status of the pressure pipeline to be tested; The identification module 430 is further specifically used to select candidate position points from the candidate position points according to the organic heat carrier property information and the real-time detection information; The identification module 430 is further specifically configured to use the initial detection position and the candidate position point as the optimized detection position; The identification module 430 is further specifically configured to obtain a state image of the optimized detection position through the radiographic digital imaging technology, identify the state image based on a contamination detection standard, and obtain an identification result of the optimized detection position.

[0132] Optionally, the determination module 410 is specifically configured to determine the accumulated working time corresponding to the pressure pipeline to be tested based on the working condition information; The determination module 410 is further specifically used to determine the easily fractured area in the structure of the pressure pipeline to be tested by using the accumulated working time as the monitoring data; The determination module 410 is further specifically configured to determine the easily breakable area as the first candidate detection position.

[0133] Optionally, the screening module 420 is further specifically used to select working parameters of multiple pressure pipelines based on the research object database; the working parameters at least include temperature dimensions and pressure dimensions corresponding to the multiple pressure pipelines; The screening module 420 is further specifically used to obtain the quality data of each pressure pipeline at different times in the historical working data, and generate training samples in combination with the working parameters; The screening module 420 is also specifically used to train a benchmark model based on the training samples to obtain the structural safety performance decay model; the trained structural safety performance decay model characterizes the correlation between the quality, temperature and pressure of the pressure pipeline and the changes over time.

[0134] Optionally, the screening module 420 is further specifically configured to generate an update sample in combination with the recognition result, the attribute information and the operating condition information, wherein the update sample represents the real-time status of the pressure pipeline at the current moment; The screening module 420 is further specifically configured to update the structural safety performance decay model based on the updated sample.

[0135] Optionally, the determination module 410 is further specifically used to obtain a contamination detection standard corresponding to the pressure pipeline to be tested; the contamination detection standard represents the association relationship between different identification results and multiple safety levels; The determination module 410 is further specifically configured to transform the identification result based on the contamination detection standard to obtain the current safety level, and determine the state of the pressure pipeline to be tested based on the safety level.

[0136] Optionally, the determination module 410 is further specifically configured to re-inspect the pressure pipeline to be tested to obtain a re-inspection result when the safety level exceeds a preset level; the re-inspection is performed based on phased array ultrasonic testing; The determination module 410 is further specifically configured to correct the identification result based on the re-inspection result and re-determine the state of the pressure pipeline to be tested.

[0137] Please continue to refer to Figure 3 The present application also provides an on-line inspection device for an organic heat carrier pressure pipeline without stopping, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any one of the methods provided in the first aspect of the present application are implemented.

[0138] The present application also provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the steps of any one of the methods provided in the present application are implemented.

[0139] The implementation process of the functions and effects of each unit in the above-mentioned device is specifically described in the implementation process of the corresponding steps in the above-mentioned method, and will not be repeated here.

[0140] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present application scheme. A person of ordinary skill in the art can understand and implement it without paying any creative work.

[0141] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for online inspection of an organic heat carrier pressure pipeline without stopping the machine, characterized in that: The method comprises: Determine a first candidate detection position according to the structure of the pressure pipeline to be tested; Determining real-time operation information based on the property information of the organic heat carrier transported by the pressure pipeline to be tested and the operating condition information of the pressure pipeline to be tested; Inputting the real-time operation information into a pressure pipeline structural safety performance decay model, obtaining a model prediction result based on the attribute information, and selecting an initial detection position from the first candidate detection positions according to the model prediction result, the pressure pipeline structural safety performance decay model is used to predict the change law of corrosion conditions at various positions of the pressure pipeline to be tested over time; Obtaining a state image of the initial detection position by using a radiographic digital imaging technique, identifying the state image based on a contamination detection standard, and obtaining an identification result of the initial detection position; The state of the pressure pipeline to be tested is determined based on the identification result.

2. The method according to claim 1, characterized in that The step of inputting the real-time operation information into the pressure pipeline structure safety performance decay model and obtaining the model prediction result based on the attribute information includes: Determining a pressure pipeline corrosion variation coefficient according to the corrosion properties of the organic heat carrier and the pressure pipeline to be tested; determining a pressure pipeline temperature variation coefficient based on a delivery temperature of the organic heat carrier; Adjusting the pressure pipeline structural safety performance decay model according to the corrosion variation coefficient and the temperature variation coefficient to obtain a target decay model of the pressure pipeline to be tested; A model prediction result is obtained based on the target decay model and the real-time operation information.

3. The method according to claim 2, characterized in that The obtaining of a model prediction result based on the target decay model and the real-time operation information includes: estimating a delivery time of the organic heat carrier based on the real-time operation information; The real-time operation information is input into the target decay model to predict the corrosion state of the pressure pipeline to be tested from the current moment to the end moment of the delivery time.

4. The method according to claim 1, characterized in that: After selecting the initial detection position from the first candidate detection positions according to the model prediction result, the method further includes: Determine the candidate location point according to the maintenance status of the pressure pipeline to be tested; Selecting candidate positions from the candidate positions according to the organic heat carrier property information and the real-time detection information; Taking the initial detection position and the candidate position points as optimized detection positions; The state image of the optimized detection position is obtained by using the radiographic digital imaging technology, and the state image is identified based on the contamination detection standard to obtain the identification result of the optimized detection position.

5. The method according to claim 1, characterized in that The step of determining the first candidate detection position according to the structure of the pressure pipeline to be detected comprises: Determine the accumulated working time corresponding to the pressure pipeline to be tested based on the working condition information; Using the accumulated working time as monitoring data, determining the easily fractured area in the structure of the pressure pipeline to be tested; The easily breakable region is determined as the first candidate detection position.

6. The method according to claim 1, characterized in that The method for constructing the structural safety performance decay model comprises: Selecting working parameters of a plurality of pressure pipelines based on the research object database; the working parameters at least include temperature dimensions and pressure dimensions corresponding to the plurality of pressure pipelines; Acquire the quality data of each of the pressure pipelines at different times in the historical working data, and generate training samples in combination with the working parameters; A benchmark model is trained based on the training samples to obtain the structural safety performance decay model; the trained structural safety performance decay model characterizes the correlation between the quality, temperature and pressure of the pressure pipeline and the changes over time.

7. The method according to claim 6, characterized in that After obtaining the structural safety performance decay model, the method further includes: generating an update sample in combination with the recognition result, the attribute information and the operating condition information, wherein the update sample represents the real-time state of the pressure pipeline at the current moment; The structural safety performance decay model is updated based on the updated samples.

8. The method according to claim 1, characterized in that The determining the state of the pressure pipeline to be tested based on the identification result includes: Acquire a contamination detection standard corresponding to the pressure pipeline to be tested; the contamination detection standard represents the correlation between different identification results and multiple safety levels; The identification result is converted based on the contamination detection standard to obtain the current safety level, and the state of the pressure pipeline to be tested is determined based on the safety level.

9. The method according to claim 8, characterized in that After determining the state of the pressure pipeline to be tested based on the safety level, the method further includes: When the safety level exceeds the preset level, the pressure pipeline to be tested is re-inspected to obtain a re-inspection result; the re-inspection is completed based on phased array ultrasonic testing; The identification result is corrected based on the re-inspection result, and the state of the pressure pipeline to be tested is re-determined.

10. An on-line inspection device for an organic heat carrier pressure pipeline without stopping the machine, characterized in that: The device comprises a determination module, a screening module and an identification module; wherein, The determination module is used to determine the first candidate detection position according to the structure of the pressure pipeline to be tested; The determination module is further used to determine the real-time operation information based on the property information of the organic heat carrier transported by the pressure pipeline to be tested and the working condition information of the pressure pipeline to be tested; The screening module is used to input the real-time operation information into the pressure pipeline structure safety performance decay model, obtain the model prediction result based on the attribute information, and screen the initial detection position from the first candidate detection position according to the model prediction result. The pressure pipeline structure safety performance decay model is used to predict the change law of the corrosion condition of each position of the pressure pipeline to be tested over time; The recognition module is used to obtain a state image of the initial detection position by using a radiographic digital imaging technique, recognize the state image based on a contamination detection standard, and obtain a recognition result of the initial detection position; The determination module is further used to determine the state of the pressure pipeline to be tested based on the identification result.

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