A safety assessment system and method for high temperature pressure piping

Abstract

The application discloses a safety evaluation system and method for high-temperature pressure pipelines, and the method comprises the following steps: a walking device drives a stress detection device to move on the high-temperature pressure pipeline; the detection position and the detection angle of a detection probe of the stress detector are adjusted through a stress posture adjusting mechanism, so that the axial stress and the circumferential stress on the high-temperature pressure pipeline are detected; the detected detection data are uploaded to a control processing device through a data transmission module; the control processing device analyzes and calculates the detection data information, obtains the stress parameters of the high-temperature pressure pipeline, and further uploads the stress parameters to a database of a risk evaluation system; the basic parameters of the high-temperature pressure pipeline to be evaluated are input into the risk evaluation system and stored in the database; the risk evaluation system automatically performs safety evaluation on the high-temperature pressure pipeline through an established risk evaluation calculation model, and sends the evaluation result to a user.

Description

Technical Field

[0001] This invention belongs to the field of pipeline inspection, specifically a safety assessment system and method for high-temperature and high-pressure pipelines. Background Technology

[0002] The main process temperatures in typical oil refining processes in petrochemical enterprises range from 200-550℃, with some processes in catalytic cracking and coking reaching 700-800℃. Pressure pipelines operating under these high-temperature environments for extended periods are prone to creep damage. If pipelines exhibit defects exceeding safety limits, the propagation of creep cracks can easily lead to leaks and explosions. Therefore, conducting safety assessments of in-service high-temperature pressure pipelines is of paramount importance.

[0003] Based on JB / T 12746-2015 "Safety Assessment Method for Defective High-Temperature Pressure Pipelines and Valves" and GB / T19624-2019 "Safety Assessment of In-Service Defective Pressure Vessels," safety assessments can be conducted on in-service high-temperature pressure pipelines with defects. However, most inspectors conservatively adopt repair or replacement strategies for defects exceeding standards, rarely conducting safety assessments. This is mainly because the safety assessment of defective high-temperature pressure pipelines in JB / T 12746 is theoretically demanding, complex in process, and requires high comprehensive capabilities from assessors, thus limiting its widespread application in special inspection agencies. As time progresses, creep in high-temperature pressure pipelines becomes increasingly pronounced, and the probability of creep fracture in defective high-temperature pressure pipelines also increases. Determining whether manufacturing defects, defects, or damage generated during service threaten the operational safety of defective high-temperature pressure pipelines, and how to effectively assess their safety status, will be a key focus and challenge for future inspection work.

[0004] However, most inspectors conservatively adopt a repair or replacement strategy for defects exceeding standards in high-temperature pressure pipelines, rarely conducting safety assessments. Yet, some defects exceeding standards are permissible through safety assessments. Furthermore, the safety assessments of defective high-temperature pressure pipelines in JB / T 12746 and GB / T 19624 are theoretically rigorous, complex in process, and demand high comprehensive abilities from assessors, making it difficult to widely implement safety assessments of defective high-temperature pressure pipelines in special inspection agencies. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides a safety assessment system for high-temperature pressure pipelines. The system can travel on the high-temperature pressure pipeline and automatically detect the stress parameters at various locations on the pipeline, and automatically analyze the safety status of the pipeline in conjunction with other basic data.

[0006] Another object of the present invention is to provide a safety assessment method for high-temperature pressure pipelines.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is:

[0008] A safety assessment system for high-temperature pressure pipelines includes a stress detection device, a traveling device for driving the stress detection device to crawl on the high-temperature pressure pipeline, a control and processing device, and a risk assessment system.

[0009] The stress detection device includes a stress detector and a stress attitude adjustment mechanism for adjusting the detection position of the stress detector to realize axial and circumferential stress detection of the high-temperature pressure pipeline.

[0010] The walking device includes a crawling mechanism, which includes a support, a first clamping mechanism and a second clamping mechanism mounted on the support, and a linear drive mechanism for driving the first clamping mechanism to move along the axial direction of the high-temperature pressure pipeline. The first clamping mechanism and the second clamping mechanism are both used to clamp and release the high-temperature pressure pipeline. The stress detection device and the first clamping mechanism are fixedly connected by a connecting seat.

[0011] The control and processing device is used to analyze and calculate the detection data information obtained by the stress detection device to obtain the stress parameters of the high-temperature pressure pipeline.

[0012] The risk assessment system uses a risk assessment calculation model to automatically retrieve basic data from the database for analysis and processing, performs a safety assessment of the high-temperature pressure pipeline, and sends the assessment results to the user.

[0013] Preferably, the crawling mechanism comprises two sets: a first crawling mechanism and a second crawling mechanism. The linear drive mechanism of the first crawling mechanism drives the first clamping mechanism and simultaneously drives the stress detection device. A rotary drive mechanism is provided between the second crawling mechanism and the first crawling mechanism to drive the second crawling mechanism or the first crawling mechanism and the stress detection device to rotate around the axis of the high-temperature pressure pipe. When the first and second clamping mechanisms in the first crawling mechanism clamp the high-temperature pressure pipe, and the first and second clamping mechanisms in the second crawling mechanism release the high-temperature pressure pipe, the rotary drive mechanism drives the second crawling mechanism to rotate around the axis of the high-temperature pressure pipe. When the first and second clamping mechanisms in the second crawling mechanism clamp the high-temperature pressure pipe, and the first and second clamping mechanisms in the first crawling mechanism release the high-temperature pressure pipe, the rotary drive mechanism drives the first crawling mechanism and the stress detection device to rotate around the axis of the high-temperature pressure pipe.

[0014] Preferably, the rotary drive mechanism includes a support frame mounted on the connecting seat of the second crawling mechanism and a rotary motor mounted on the support frame. The rotary motor has a rotary gear on its main shaft. The first crawling mechanism has an arc-shaped guide block on its support. An arc-shaped rack, meshing with the rotary gear, is located at the center of the arc-shaped guide block and extends along the length of the arc-shaped guide block. The support frame has an arc-shaped guide sleeve with the same curvature as the arc-shaped guide block, and the arc-shaped guide sleeve is mounted on the arc-shaped guide block. The arc-shaped guide sleeve and the arc-shaped guide block are movable along their extension direction.

[0015] Preferably, a swing drive mechanism is further provided between the rotary drive mechanism and the first crawling mechanism for driving the first crawling mechanism and the stress detection device or the second crawling mechanism and the rotary drive mechanism to swing. Specifically, when the first clamping mechanism and the second clamping mechanism in the first crawling mechanism clamp the high-temperature pressure pipe, and the first clamping mechanism and the second clamping mechanism in the second crawling mechanism release the high-temperature pressure pipe, the swing drive mechanism drives the second crawling mechanism and the rotary drive mechanism to swing. When the first clamping mechanism and the second clamping mechanism in the second crawling mechanism clamp the high-temperature pressure pipe, and the first clamping mechanism and the second clamping mechanism in the first crawling mechanism release the high-temperature pressure pipe, the swing drive mechanism drives the first crawling mechanism and the stress detection device to swing.

[0016] Preferably, the swing drive mechanism includes a swing seat and a swing motor disposed on the swing seat, wherein the arc-shaped guide block is mounted on the swing seat and extends beyond the swing seat; the main shaft of the swing motor is connected to a rotating seat mounted on a bracket in the first crawling mechanism, for driving the bracket in the first crawling mechanism to rotate.

[0017] Preferably, the swing drive mechanism further includes a third clamping mechanism disposed on the swing seat for clamping the high-temperature pressure pipe; when the swing drive mechanism is working, the third clamping mechanism clamps the high-temperature pressure pipe.

[0018] Preferably, the stress attitude adjustment mechanism includes a detection seat, an arc-shaped guide rail disposed on the detection seat, and a rotation drive mechanism for driving the arc-shaped guide rail to rotate. A rack is disposed on the upper side of the arc-shaped guide rail, extending along the extension direction of the arc-shaped guide rail. The stress detector is mounted on an arc-shaped slider, which is installed inside the arc-shaped guide rail. The arc-shaped slider is provided with a traveling mechanism for driving the arc-shaped slider to move within the arc-shaped guide rail. The traveling mechanism includes a traveling motor disposed on the arc-shaped slider and a traveling gear disposed on the main shaft of the traveling motor, wherein the traveling gear meshes with the rack.

[0019] Preferably, the arc-shaped guide rail and the arc-shaped slider are concentric, and the centers of both are located on the axis of the high-temperature pressure pipeline.

[0020] Preferably, the first clamping mechanism, the second clamping mechanism, and the third clamping mechanism have the same structure, each including a gripper and a clamping cylinder for driving the gripper to clamp or release the high-temperature pressure pipeline; the linear drive mechanism adopts a combination of a motor and a lead screw transmission mechanism, and a linear guide mechanism is provided on one or both sides of the lead screw in the lead screw transmission mechanism, and the linear guide mechanism adopts a combination of a slide rod and a slide sleeve / slide hole.

[0021] A safety assessment method for high-temperature pressure pipelines includes the following steps:

[0022] (1) The walking device moves the stress detection device on the high-temperature pressure pipeline. The detection position and detection angle of the detection probe of the stress detector are adjusted by the stress attitude adjustment mechanism to detect the axial stress and circumferential stress on the high-temperature pressure pipeline. The detected data is uploaded to the control and processing device through the data transmission module. The control and processing device analyzes and calculates the detection data to obtain the stress parameters of the high-temperature pressure pipeline. The stress parameters include the primary stress and secondary stress of the high-temperature pressure pipeline during detection. The control and processing device further uploads the stress parameters to the database of the risk assessment system.

[0023] (2) Input the basic parameters of the high-temperature pressure pipeline to be evaluated into the risk assessment system and store them in the database;

[0024] (3) The risk assessment system uses the established risk assessment calculation model and automatically retrieves the basic data in the database for analysis and processing to conduct a safety assessment of the high-temperature pressure pipeline and sends the assessment results to the user.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0026] 1. The safety assessment system for high-temperature pressure pipelines of the present invention uses a crawling device to drive a stress detection device to move on the high-temperature pressure pipeline, thereby enabling the stress detection device to collect stress values ​​at various locations in the high-temperature pressure pipeline; and analyzes and processes these values ​​through a control and processing device to obtain stress parameters, and uploads the obtained stress parameters to a risk assessment system, which then automatically analyzes the safety status of the high-temperature pressure pipeline.

[0027] 2. The safety assessment system for high-temperature pressure pipelines of the present invention can automatically detect the stress value of high-temperature pressure pipelines, replacing the traditional manual inspection, with a higher degree of automation, while also improving inspection efficiency and reducing inspection costs.

[0028] 3. In the safety assessment method for high-temperature pressure pipelines of the present invention, staff only need to input the basic parameters into the risk assessment system, and the risk assessment system can automatically assess the safety of the high-temperature pressure pipeline according to the safety judgment method in the "Mechanical Industry Standard of the People's Republic of China (JB / T12746-2015) - Safety Assessment Method for High-Temperature Pressure Pipelines and Valves with Defects".

[0029] 4. The safety assessment method for high-temperature pressure pipelines of the present invention can quickly obtain the safety assessment results of high-temperature pressure pipelines with defects, thereby determining whether manufacturing defects, defects or damage generated during service will threaten their operational safety, achieving efficient and accurate safety assessment; providing technical support for subsequent modification, repair, scrapping, replacement or continued operation of high-temperature pressure pipelines, which can save costs, shorten construction period and reduce risks for enterprises to a certain extent, effectively ensuring the operational safety of special equipment, and has very important social benefits. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the stress detection device and crawling device in the safety assessment system for high-temperature pressure pipelines of the present invention.

[0031] Figures 2-5These are three-dimensional structural diagrams of the stress detection device and crawling device in the safety assessment system for high-temperature pressure pipelines of the present invention from four different perspectives.

[0032] Figure 6 and Figure 7 These are three-dimensional structural diagrams of the rotary drive mechanism and the oscillating drive mechanism from two different perspectives.

[0033] Figure 8 This is a three-dimensional structural diagram of the stress detection device.

[0034] Figure 9 This is a structural block diagram of the safety assessment system for high-temperature pressure pipelines according to the present invention.

[0035] Figure 10 This is a flowchart illustrating the existing technology of the "Mechanical Industry Standard of the People's Republic of China (JB / T 12746-2015) - Safety Assessment Method for High-Temperature Pressure Pipelines and Valves with Defects". Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0037] See Figures 1-10 The safety assessment system for high-temperature pressure pipelines of the present invention includes a stress detection device 1, a walking device for driving the stress detection device 1 to crawl on the high-temperature pressure pipeline, a control and processing device, and a risk assessment system.

[0038] See Figures 1-10 The stress detection device 1 includes a stress detector 106 and a stress attitude adjustment mechanism for adjusting the detection position of the stress detector 106 to realize the axial and circumferential stress detection of the high-temperature pressure pipeline.

[0039] See Figures 1-10 The walking device includes a crawling mechanism, which includes a support 6, a first clamping mechanism 11 and a second clamping mechanism 10 mounted on the support 6, and a linear drive mechanism for driving the first clamping mechanism 11 to move along the axial direction of the high-temperature pressure pipeline. Both the first clamping mechanism 11 and the second clamping mechanism 10 are used to clamp and release the high-temperature pressure pipeline. The stress detection device 1 and the first clamping mechanism 11 are fixedly connected by a connecting seat.

[0040] The crawling mechanism crawls in the following manner:

[0041] The second clamping mechanism 10 grips the high-temperature pressure pipe, then the first clamping mechanism 11 releases the high-temperature pressure pipe, and then the linear drive mechanism drives the first clamping mechanism 11 to move forward; subsequently, the first clamping mechanism 11 grips the high-temperature pressure pipe, and the linear drive mechanism resets, causing the bracket 6 and the second clamping mechanism 10 mounted on the bracket 6 to move forward, thereby enabling the crawling mechanism to crawl on the high-temperature pressure pipe.

[0042] See Figures 1-10 The crawling mechanism consists of two sets: a first crawling mechanism 2 and a second crawling mechanism 5. The linear drive mechanism of the first crawling mechanism 2 drives the first clamping mechanism 11 and simultaneously drives the stress detection device 1. A rotary drive mechanism 4 is provided between the second crawling mechanism 5 and the first crawling mechanism 2 to drive either the second crawling mechanism 5 or the first crawling mechanism 2 and the stress detection device 1 to rotate around the axis of the high-temperature pressure pipe. When the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 clamp the high-temperature pressure pipe, and the... When the first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 release the high-temperature pressure pipe, the rotary drive mechanism 4 drives the second crawling mechanism 5 to rotate around the axis of the high-temperature pressure pipe; when the first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 clamp the high-temperature pressure pipe, and the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 release the high-temperature pressure pipe, the rotary drive mechanism 4 drives the first crawling mechanism 2 and the stress detection device 1 to rotate around the axis of the high-temperature pressure pipe.

[0043] The rotary drive mechanism 4 includes a support frame mounted on the connecting seat of the second crawling mechanism 5 and a rotary motor 401 mounted on the support frame. A rotary gear 402 is mounted on the main shaft of the rotary motor 401. An arc-shaped guide block 403 is mounted on the support 6 of the first crawling mechanism 2. An arc-shaped rack, meshing with the rotary gear 402, is located at the center of the arc-shaped guide block 403, extending along the length of the arc-shaped guide block 403. An arc-shaped guide sleeve 404 is mounted on the support frame, with the arc of the sleeve matching the arc of the guide block 403. The arc-shaped guide sleeve 404 and the arc-shaped guide block 403 are movable along the extension direction of either the sleeve or the block.

[0044] The purpose of the above settings is:

[0045] (1) When stress detection is required on the circumferential surface of the high-temperature pressure pipeline, the first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 clamp the high-temperature pressure pipeline, and then the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 release the high-temperature pressure pipeline. Subsequently, the rotary motor 401 drives the rotary gear 402 to rotate, thereby driving the arc-shaped guide block 403 to move along the arc of the arc-shaped guide sleeve 404 within the arc-shaped guide sleeve 404, so that the first clamping mechanism 11 and the stress detection device 1 connected thereto rotate around the axis of the high-temperature pressure pipeline, for example, from the upper side to the lower side of the high-temperature pressure pipeline; so that the stress detection device 1 can realize circumferential stress detection of the high-temperature pressure pipeline.

[0046] (2) Since "when the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 clamp the high-temperature pressure pipe, and the first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 release the high-temperature pressure pipe, the rotary drive mechanism 4 is used to drive the second crawling mechanism 5 to rotate around the axis of the high-temperature pressure pipe; when the first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 clamp the high-temperature pressure pipe, and the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 release the high-temperature pressure pipe, the rotary drive mechanism 4 is used to drive the first crawling mechanism 2 and the stress detection device 1 to rotate around the axis of the high-temperature pressure pipe.", the first crawling mechanism 2 and the second crawling mechanism 5 can also be rotated independently in the above manner to avoid obstacles.

[0047] See Figures 1-10 A swing drive mechanism 3 is further provided between the rotary drive mechanism 4 and the first crawling mechanism 2 to drive the first crawling mechanism 2 and the stress detection device 1, or the second crawling mechanism 5 and the rotary drive mechanism 4, to swing. Specifically, when the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 clamp the high-temperature pressure pipe, and the first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 release the high-temperature pressure pipe, the swing drive mechanism 3 drives the second crawling mechanism 5 and the rotary drive mechanism 4 to swing; when the first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 clamp the high-temperature pressure pipe, and the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 release the high-temperature pressure pipe, the swing drive mechanism 3 drives the first crawling mechanism 2 and the stress detection device 1 to swing.

[0048] The swing drive mechanism 3 includes a swing seat and a swing motor 301 mounted on the swing seat. The arc-shaped guide block 403 is mounted on the swing seat and extends out of the swing seat. The main shaft of the swing motor 301 is connected to a rotating seat 302 mounted on a bracket 6 in the first crawling mechanism 2, and is used to drive the bracket 6 in the first crawling mechanism 2 to rotate.

[0049] The purpose of the above settings is to;

[0050] By setting the swing drive mechanism 3, the first crawling mechanism 2 and the stress detection device 1 swing, or the second crawling mechanism 5 and the rotation drive mechanism 4 swing. When the crawling device moves to a non-horizontal section in the high-temperature pressure pipe, such as a 90-degree vertical section, the first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 can grip the high-temperature pressure pipe. Then, the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 release the high-temperature pressure pipe. Then, the swing motor 301 drives the bracket 6 in the first crawling mechanism 2 to rotate, thereby driving the first crawling mechanism 2 and the stress detection device 1 to swing, so that the first crawling mechanism 2 and the second crawling mechanism 5 form a 90-degree angle. Then, the second crawling mechanism 5 in the crawling device drives the whole to move forward, so that the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 grip the vertical section of the high-temperature pressure pipe again. Next, the first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 release the high-temperature pressure pipe. The first crawling mechanism 2 in the crawling device drives the entire crawling device of the present invention to move. After rising to a sufficient height, the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 clamp the high-temperature pressure pipe again. The swing motor 301 rotates, thereby causing the second crawling mechanism 5 to change from a horizontal state to a vertical state. The first clamping mechanism 11 and the second clamping mechanism 10 in the second crawling mechanism 5 clamp the high-temperature pressure pipe again. Finally, the first crawling mechanism 2 and the second crawling mechanism 5 crawl again, thereby realizing the crawling device climbing from the horizontal section to the vertical section of the high-temperature pressure pipe, thus adapting to pipes at different angles. At the same time, in conjunction with the rotary drive mechanism 4, stress detection can be performed on different positions of pipes at different angles.

[0051] See Figures 1-10The swing drive mechanism 3 further includes a third clamping mechanism 12 disposed on the swing seat for clamping the high-temperature pressure pipe; when the swing drive mechanism 3 is working, the third clamping mechanism 12 clamps the high-temperature pressure pipe. With the above configuration, even if the first clamping mechanism 11 and the second clamping mechanism 10 in the first crawling mechanism 2 or the second crawling mechanism 5 do not tightly grip the high-temperature pressure pipe, the swing drive mechanism 3 can still drive the second crawling mechanism 5 or the first crawling mechanism 2 to swing. Furthermore, by providing the third clamping mechanism 12, the supporting force or clamping force can also be enhanced.

[0052] See Figures 1-10 The stress posture adjustment mechanism includes a detection seat 101, an arc-shaped guide rail 103 mounted on the detection seat 101, and a rotation drive mechanism for driving the arc-shaped guide rail 103 to rotate. The rotation drive mechanism includes a rotation motor 102 mounted on the detection seat 101, with its main shaft connected to the arc-shaped guide rail 103. A rack is provided on the upper side of the arc-shaped guide rail 103, extending along its extension direction. The stress detector 106 is mounted on an arc-shaped slider, which is installed within the arc-shaped guide rail 103. A traveling mechanism is provided on the arc-shaped slider for driving its movement within the arc-shaped guide rail 103. The traveling mechanism includes a traveling motor 105 mounted on the arc-shaped slider and a traveling gear 104 mounted on the main shaft of the traveling motor 105, wherein the traveling gear 104 meshes with the rack. Through the cooperation of the self-rotation drive mechanism and the walking mechanism, the pressure detector is driven to perform stress detection at various positions within the rotation range of the arc-shaped guide rail 103. Furthermore, the centers of the arc-shaped guide rail 103 and the arc-shaped slider are located on the axis of the high-temperature pressure pipeline, and both are concentric.

[0053] See Figures 1-10 The first clamping mechanism 11, the second clamping mechanism 10, and the third clamping mechanism 12 have the same structure, all including grippers and clamping cylinders for driving the grippers to clamp or release the high-temperature pressure pipeline; the linear drive mechanism adopts a combination of motor and lead screw transmission mechanism, and a linear guide mechanism is provided on one or both sides of the lead screw in the lead screw transmission mechanism. The linear guide mechanism adopts a combination of slide rod and slide sleeve / slide hole to linearly guide the connecting seat and ensure its motion accuracy.

[0054] See Figures 1-10 The control and processing device is used to analyze and calculate the detection data information obtained by the stress detection device 1 to obtain the stress parameters of the high-temperature pressure pipeline.

[0055] See Figures 1-10 The risk assessment system uses a risk assessment calculation model to automatically retrieve basic data from the database for analysis and processing, performs a safety assessment of the high-temperature pressure pipeline, and sends the assessment results to the user.

[0056] See Figures 1-10 The safety assessment method for high-temperature pressure pipelines of the present invention includes the following steps:

[0057] (1) The walking device drives the stress detection device 1 to move on the high-temperature pressure pipeline. The detection position and detection angle of the detection probe of the stress detector 106 are adjusted by the stress attitude adjustment mechanism, thereby detecting the axial stress and circumferential stress on the high-temperature pressure pipeline. The detected data is uploaded to the control and processing device through the data transmission module. The control and processing device analyzes and calculates the detection data to obtain the stress parameters of the high-temperature pressure pipeline. The stress parameters include the primary stress and secondary stress of the high-temperature pressure pipeline during detection. The control and processing device further uploads the stress parameters to the database of the risk assessment system.

[0058] (2) Input the basic parameters of the high-temperature pressure pipeline to be evaluated into the risk assessment system and store them in the database. The basic parameters include the service life, expected service life, load history, temperature history, etc. For specific implementation, refer to the relevant requirements in the "Mechanical Industry Standard of the People's Republic of China (JB / T 12746--2015) - Safety Assessment Method for High-Temperature Pressure Pipelines and Valves with Defects".

[0059] (3) The risk assessment system uses the established risk assessment calculation model and automatically retrieves the basic data in the database for analysis and processing to conduct a safety assessment of the high-temperature pressure pipeline and sends the assessment results to the user.

[0060] The risk assessment calculation model is constructed based on the safety assessment method in the "Mechanical Industry Standard of the People's Republic of China (JB / T12746-2015) - Safety Assessment Method for High-Temperature Pressure Pipelines and Valves with Defects". That is, the staff only needs to input the corresponding basic parameters into the computer, and the risk assessment calculation model in the computer will automatically conduct a safety assessment of the high-temperature pressure pipeline to be tested according to the safety judgment method in the "Mechanical Industry Standard of the People's Republic of China (JB / T 12746-2015) - Safety Assessment Method for High-Temperature Pressure Pipelines and Valves with Defects", thereby reducing the burden on the staff and improving efficiency. For example, in the Visual Studio platform, the Visual Studio language can be used to parametrically program the safety assessment process of defective high-temperature pressure pipelines, building an interactive, parametric analysis interface to quickly obtain the safety assessment results of defective high-temperature pressure pipelines. This allows for the determination of whether manufacturing defects, defects or damage generated during service will threaten their operational safety, achieving efficient and accurate safety assessments. This provides technical support for subsequent modification, repair, scrapping, replacement, or continued operation of high-temperature pressure pipelines, which can save costs, shorten construction periods, and reduce risks for enterprises to a certain extent, effectively ensuring the operational safety of special equipment and having significant social benefits.

[0061] Finally, the safety assessment method for high-temperature pressure pipelines of the present invention has the following characteristics: (1) Establishing a database of material mechanical properties such as creep deformation data. (2) Using finite element analysis software to obtain the stress distribution of defective pressure pipelines under high-temperature operating conditions. (3) Modularizing the safety assessment calculation process on the Visual Studio platform, users only need to input parameters, and the system automatically completes the calculation and provides the assessment results. (4) By prefabricating defective pressure pipelines, relevant tests are conducted under high-temperature operating conditions to verify the accuracy of the system stress analysis and safety assessment.

[0062] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A safety assessment system for high-temperature pressure pipelines, characterized in that, It includes a stress detection device, a traveling device for driving the stress detection device to crawl on a high-temperature and high-pressure pipeline, a control and processing device, and a risk assessment system, wherein, The stress detection device includes a stress detector and a stress attitude adjustment mechanism for adjusting the detection position of the stress detector to realize axial and circumferential stress detection of the high-temperature pressure pipeline. The walking device includes a crawling mechanism, which includes a support, a first clamping mechanism and a second clamping mechanism mounted on the support, and a linear drive mechanism for driving the first clamping mechanism to move along the axial direction of the high-temperature pressure pipeline. The first clamping mechanism and the second clamping mechanism are both used to clamp and release the high-temperature pressure pipeline. The stress detection device and the first clamping mechanism are fixedly connected by a connecting seat. The control and processing device is used to analyze and calculate the detection data information obtained by the stress detection device to obtain the stress parameters of the high-temperature pressure pipeline. The risk assessment system uses a risk assessment calculation model to automatically retrieve basic data from the database for analysis and processing, performs a safety assessment of the high-temperature pressure pipeline, and sends the assessment results to the user. The crawling mechanism consists of two sets: a first crawling mechanism and a second crawling mechanism. The linear drive mechanism of the first crawling mechanism drives the first clamping mechanism and simultaneously drives the stress detection device. A rotary drive mechanism is provided between the second crawling mechanism and the first crawling mechanism to drive the second crawling mechanism, or the first crawling mechanism and the stress detection device, to rotate around the axis of the high-temperature pressure pipe. When the first and second clamping mechanisms in the first crawling mechanism clamp the high-temperature pressure pipe, and the first and second clamping mechanisms in the second crawling mechanism release the high-temperature pressure pipe, the rotary drive mechanism drives the second crawling mechanism to rotate around the axis of the high-temperature pressure pipe. When the first and second clamping mechanisms in the second crawling mechanism clamp the high-temperature pressure pipe, and the first and second clamping mechanisms in the first crawling mechanism release the high-temperature pressure pipe, the rotary drive mechanism drives the first crawling mechanism and the stress detection device to rotate around the axis of the high-temperature pressure pipe. The rotary drive mechanism includes a support frame mounted on the connecting seat of the second crawling mechanism and a rotary motor mounted on the support frame. A rotary gear is mounted on the main shaft of the rotary motor. An arc-shaped guide block is mounted on the support of the first crawling mechanism. An arc-shaped rack, meshing with the rotary gear, is located at the center of the arc-shaped guide block, extending along the length of the arc-shaped guide block. An arc-shaped guide sleeve is mounted on the support frame, with the arc of the guide sleeve matching the arc of the arc-shaped guide block. The arc-shaped guide sleeve and the arc-shaped guide block are movable along their respective extension directions. When stress is detected on the circumferential surface of a high-temperature pressure pipeline, the first and second clamping mechanisms in the second crawling mechanism clamp the high-temperature pressure pipeline, and the first and second clamping mechanisms in the first crawling mechanism release the high-temperature pressure pipeline. The rotary motor drives the rotary gear to rotate, which in turn drives the arc-shaped guide block to move along the arc of the arc-shaped guide sleeve within the arc-shaped guide sleeve. The first clamping mechanism and the stress detection device connected to it rotate around the axis of the high-temperature pressure pipeline, thereby realizing the circumferential stress detection of the high-temperature pressure pipeline. A swing drive mechanism is further provided between the rotary drive mechanism and the first crawling mechanism for driving the first crawling mechanism and the stress detection device, or the second crawling mechanism and the rotary drive mechanism, to swing. Specifically, when the first clamping mechanism and the second clamping mechanism in the first crawling mechanism clamp the high-temperature pressure pipe, and the first clamping mechanism and the second clamping mechanism in the second crawling mechanism release the high-temperature pressure pipe, the swing drive mechanism drives the second crawling mechanism and the rotary drive mechanism to swing. Conversely, when the first clamping mechanism and the second clamping mechanism in the second crawling mechanism clamp the high-temperature pressure pipe, and the first clamping mechanism and the second clamping mechanism in the first crawling mechanism release the high-temperature pressure pipe, the swing drive mechanism drives the first crawling mechanism and the stress detection device to swing. The swing drive mechanism includes a swing base and a swing motor mounted on the swing base. The arc-shaped guide block is mounted on the swing base and extends beyond the swing base. The main shaft of the swing motor is connected to a rotating seat mounted on a bracket in the first crawling mechanism, and is used to drive the bracket in the first crawling mechanism to rotate. The swing drive mechanism further includes a third clamping mechanism disposed on the swing seat for clamping the high-temperature pressure pipe; when the swing drive mechanism is working, the third clamping mechanism clamps the high-temperature pressure pipe. The swing center of the swing drive mechanism is perpendicular to the rotation center of the rotary drive mechanism.

2. The safety assessment system for high-temperature pressure pipelines according to claim 1, characterized in that, The stress attitude adjustment mechanism includes a detection seat, an arc-shaped guide rail mounted on the detection seat, and a rotation drive mechanism for driving the arc-shaped guide rail to rotate. A rack is provided on the upper side of the arc-shaped guide rail, extending along the extension direction of the arc-shaped guide rail. The stress detector is mounted on an arc-shaped slider, which is installed inside the arc-shaped guide rail. A traveling mechanism is provided on the arc-shaped slider for driving the slider to move within the arc-shaped guide rail. The traveling mechanism includes a traveling motor mounted on the arc-shaped slider and a traveling gear mounted on the main shaft of the traveling motor, wherein the traveling gear meshes with the rack.

3. The safety assessment system for high-temperature pressure pipelines according to claim 2, characterized in that, The arc-shaped guide rail and the arc-shaped slider are concentric, and the centers of both are located on the axis of the high-temperature pressure pipeline.

4. The safety assessment system for high-temperature pressure pipelines according to claim 1, characterized in that, The first clamping mechanism, the second clamping mechanism, and the third clamping mechanism have the same structure, all including a gripper and a clamping cylinder for driving the gripper to clamp or release the high-temperature pressure pipeline; the linear drive mechanism adopts a combination of a motor and a lead screw transmission mechanism, and a linear guide mechanism is provided on one or both sides of the lead screw in the lead screw transmission mechanism, and the linear guide mechanism adopts a combination of a slide rod and a slide sleeve / slide hole.

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