A method for predicting the loss life of a nuclear power hose

Abstract

The application discloses a kind of nuclear power hose loss life prediction methods, it is related to hose life prediction technical field, comprising: build test hose, obtain testable point;Accelerated aging test is carried out, and material aging test and mechanical aging test are carried out;Obtain material limit area and mechanical limit area;The life of nuclear power hose is predicted based on the test data of the test to the nuclear power hose to be predicted;The present application is used to solve the problems that the existing hose loss life prediction method, the prediction mode is more conventional, cannot be targeted and effectively quantified detection to the change of service life in the whole life cycle of hose, and the time span required for testing is larger, the acquisition speed of prediction data is slower, so that the loss life of hose cannot be detected in real time and efficiently.

Description

Technical Field

[0001] This invention relates to the field of hose life prediction technology, specifically a method for predicting the wear and tear life of hoses used in nuclear power plants. Background Technology

[0002] Nuclear power hoses are special hoses used in nuclear power plants to transport high-temperature, high-pressure, or radioactive media. They are divided into two categories: rubber hoses and metal hoses. They must have characteristics such as radiation resistance and corrosion resistance to ensure the safe operation of nuclear power plants. Nuclear power hoses are one of the key components of nuclear power plants. They are mainly used to transport media such as petroleum-based liquids, water-based liquids, gases, and heavy water, and to connect equipment such as diesel engines and condensers. They ensure the normal operation of the internal circulation and auxiliary exchange systems of nuclear power plants. Their core functions include resistance to extreme environments and safe transport of media.

[0003] Existing methods for predicting the wear and tear life of flexible hoses used in nuclear power plants typically involve periodic testing based on established test sequences and cycles. During these tests, tensile or material inspections are performed on the test samples, and the lifespan is predicted based on the test results. While this method can predict hose lifespan, its conventional approach cannot effectively quantify changes in hose lifespan throughout its entire lifecycle through periodic testing alone. Furthermore, the large time span required for periodic testing and the slow acquisition of prediction data result in a lack of real-time and efficient monitoring of hose wear and tear lifespan. For example, patent application CN117168977A discloses a method for predicting the wear and tear life of flexible hoses. The proposed method for assessing the lifespan of rubber hoses in power plant emergency diesel generator sets uses tensile test results from all test samples to obtain the estimated lifespan of the target rubber hose, thereby improving the accuracy of hose lifespan prediction. Other improvements to hose wear-out lifespan prediction methods typically rely on the hose's service life under specific environmental conditions. These methods are still relatively conventional, unable to provide targeted and effective quantitative detection of lifespan changes throughout the hose's entire lifespan, and suffer from long testing time spans and slow data acquisition, hindering real-time and efficient detection of hose wear-out lifespan. Therefore, it is necessary to improve existing methods for predicting hose wear-out lifespan. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in the prior art by proposing a method for predicting the wear and life of hoses used in nuclear power plants. This method addresses the issues that existing hose wear and life prediction methods are conventional, unable to provide targeted and effective quantitative detection of changes in the hose's lifespan throughout its entire life cycle, and require a large testing time span, resulting in slow acquisition of prediction data and an inability to detect hose wear and life in real time and efficiently.

[0005] To achieve the above objectives, this application provides a method for predicting the wear life of flexible hoses used in nuclear power plants, comprising the following steps:

[0006] A test hose was built based on the structure of the nuclear power hose to be predicted, and multiple testable points were obtained in the test hose. The test hose was subjected to accelerated aging test, and material aging test and mechanical aging test were used to test the test hose during the accelerated aging test. The test data obtained were recorded as material test data and mechanical test data, respectively.

[0007] The material test data and mechanical test data are analyzed, and the material confinement area and mechanical confinement area are obtained based on the analysis results;

[0008] Material aging tests and mechanical aging tests were used to test the nuclear power hoses to be tested, and the life of the nuclear power hoses was predicted based on the test data, material limitation areas, and mechanical limitation areas.

[0009] Furthermore, a test hose is constructed based on the structure of the nuclear power plant hose to be predicted, and multiple testable points are obtained within the test hose, including:

[0010] Obtain the degree measurements of all bends in the flexible hose for nuclear power plants to be predicted, and denot them sequentially as hose bend angle RJ1 to hose bend angle RJ. n Obtain the lengths of all straight hoses in the nuclear power plant hose to be tested, and record them sequentially as hose straight length RZ1 to hose straight length RZ. m Among them, a straight flexible hose is a flexible hose with corners at both ends and no corners in the hose itself;

[0011] Construct a hose of the same material as the nuclear power hose to be predicted, and denote it as the test hose. The test hose should contain n angles, which are the hose bend angles RJ1 to RJ1 respectively. n The corner, and m lengths successively from the straight length of the hose RZ1 to the straight length of the hose RZ. m Straight flexible hose;

[0012] Record any point among all the bends in the test hose and the midpoint of all the straight hoses as test points.

[0013] Furthermore, accelerated aging tests include:

[0014] Based on the material properties of the nuclear power hose to be predicted, the temperature at which the nuclear power hose to be predicted can be accelerated to age is obtained and denoted as the accelerated aging temperature; the service life of the nuclear power hose to be predicted at the accelerated aging temperature is simulated based on AI and denoted as the accelerated service life.

[0015] The test hose is placed in a test space at the accelerated aging temperature and maintained for k hours, where k is the number of hours corresponding to the accelerated service life. The radiation dose and pressure level in the test space are consistent with the radiation dose and pressure level in the space where the nuclear power hose to be predicted is located.

[0016] After the test hose is placed in the test space, material aging test and mechanical aging test are performed on the test hose every j hours. The test results are recorded as material test data and mechanical test data, respectively. The material test data includes the hardness change curve, low corner point and low straight point, and the mechanical test data includes the stress-limited area.

[0017] Furthermore, material aging tests include:

[0018] Micro-areas on the surface of the test hose were sampled at all testable points, and the sampled samples were denoted as hose sampling material RC1 to hose sampling material RC2, respectively. v Among them, the micro-region on the surface of the hose is the area below the surface of the hose that is less than or equal to t mm, and v is greater than or equal to n+m;

[0019] Establish a Cartesian coordinate system, denoted as the sampling hardness analysis coordinate system, where the X-axis is a constant axis and the Y-axis is in degrees. Sequentially obtain the Shore A hardness of all samples from the flexible tubes, with positive integers 1 to v as the abscissa and flexible tube sampling material RC1 to flexible tube sampling material RC... v The Shore A hardness is used as the ordinate to mark points in the sampling hardness analysis coordinate system, and these points are recorded as hardness marks; the curve obtained by fitting all hardness marks is recorded as the hardness variation curve.

[0020] The point with the smallest ordinate among the hardness markers corresponding to the testable points at the corner is designated as the low corner point; the point with the smallest ordinate among the hardness markers corresponding to the testable points on the straight hose is designated as the low straight point.

[0021] Furthermore, before the test tube is placed into the test space, fluorescent optical fibers are embedded in the tube reinforcement layer at all testable points of the test tube. The mechanical aging test includes:

[0022] Establish a Cartesian coordinate system with constant X and Y axes, and denote it as the stress analysis coordinate system; within the stress analysis coordinate system, obtain a v-gon centered at the origin, with each vertex 1 inch away from the origin; sequentially map each testable point to all vertices of the v-gon.

[0023] When the first mechanical aging test is performed after the test tube is placed in the test space, the length of the fluorescent fiber at all testable points is obtained and recorded as the first fiber length at the testable points.

[0024] Furthermore, the mechanical aging test also includes:

[0025] For any test from the second mechanical aging test to the u-th mechanical aging test after the test tube is placed in the test space: for any testable point, obtain the length of the fluorescent fiber at the testable point and record it as the subsequent test length. Divide the subsequent test length by the initial fiber length at the testable point and record it as the subsequent test ratio. In the ray with the origin as the endpoint and the vertex corresponding to the testable point as the direction, the point whose distance from the origin is the subsequent test ratio is recorded as the subsequent test point. Obtain the subsequent test points of all testable points and record the v-gon formed by all subsequent test points as the subsequent test shape, where u is the value of k divided by j and rounded down.

[0026] Obtain all subsequent test shapes corresponding to the second mechanical aging test to the uth mechanical aging test, and denot the closed region obtained by placing all subsequent test shapes into the same stress analysis coordinate system as the stress-constrained region.

[0027] Furthermore, the material test data and mechanical test data are analyzed, and based on the analysis results, the material confinement region and the mechanical confinement region are obtained, including:

[0028] All hardness variation curves are placed in the same sampling hardness analysis coordinate system, and the area between the upper limit curve and the lower limit curve corresponding to all hardness variation curves is recorded as the material constraint area. For any straight line A parallel to the Y-axis in the sampling hardness analysis coordinate system, the point with the largest and smallest ordinate among the points where line A coincides with all hardness variation curves is recorded as the upper limit point and the lower limit point, respectively. The upper limit points and lower limit points corresponding to all straight lines parallel to the Y-axis in the sampling hardness analysis coordinate system are obtained, and the curve formed by all upper limit points and the curve formed by all lower limit points are recorded as the upper limit curve and the lower limit curve, respectively.

[0029] All stress-constrained regions are placed in the same stress analysis coordinate system, and each stress-constrained region is processed separately. The region containing all stress-constrained regions is denoted as the mechanically constrained region.

[0030] The material test data and mechanical test data are analyzed, and the material confinement area and mechanical confinement area are obtained based on the analysis results;

[0031] Furthermore, material aging tests and mechanical aging tests are used to test the nuclear power hoses to be tested, and the lifespan of the nuclear power hoses is predicted based on the test data, material confinement areas, and mechanical confinement areas, including:

[0032] Material aging tests and mechanical aging tests were used to conduct real-time tests on the nuclear power hoses to be tested, and the test data obtained were recorded as real-time material data and real-time mechanical data, respectively.

[0033] Furthermore, the process of testing the nuclear power hoses to be predicted using material aging tests and mechanical aging tests, and predicting the lifespan of the nuclear power hoses based on the test data, material confinement areas, and mechanical confinement areas, also includes:

[0034] For real-time material data: When there are points in the low corner points and low straight points that are not in the material restriction area, the testable points corresponding to the points that are not in the material restriction area are marked as aged points, and the nuclear power hoses to be predicted are marked with aging marks.

[0035] When both the low-angle point and the low-straight point in the real-time material data are within the material restriction area, obtain the point with the smallest difference between the ordinate and the ordinate of the low-angle point in the real-time material data among all the low-angle points corresponding to the test hose within the material restriction area, and record it as the corner reference point; obtain the point with the smallest difference between the ordinate and the ordinate of the low-straight point in the real-time material data among all the low-straight points corresponding to the test hose within the restriction area, and record it as the straight line reference point.

[0036] Obtain the time that the test hose has been placed in the test space during the material aging test corresponding to the corner reference point and the straight reference point, and record it as k1 and k2 respectively; divide k1 and k2 by k and multiply by 100% respectively, and record the resulting values ​​as the percentage of the corner hose's lost life and the percentage of the straight hose's lost life respectively.

[0037] Furthermore, the process of testing the nuclear power hoses to be predicted using material aging tests and mechanical aging tests, and predicting the lifespan of the nuclear power hoses based on the test data, material confinement areas, and mechanical confinement areas, also includes:

[0038] For real-time mechanical data: the stress-limited region obtained from the real-time mechanical data is recorded as the real-time stress region. The real-time stress region is placed within the mechanical limit region. The stress-limited region within the mechanical limit region with the largest overlap ratio with the real-time stress region is recorded as the life reference region. The overlap ratio is: the value of the overlap area between the real-time stress region and the stress-limited region divided by the area of ​​the real-time stress region, plus the value of the overlap area between the real-time stress region and the stress-limited region divided by the area of ​​the stress-limited region.

[0039] The mechanical aging test corresponding to the life reference area is recorded as k3, which is the time when the test hose has been placed in the test space. k3 is divided by k and multiplied by 100%, and the resulting value is recorded as the percentage of hose stress loss life.

[0040] The beneficial effects of this invention are as follows: First, a test hose is constructed based on the structure of the nuclear power hose to be predicted, and multiple testable points are obtained in the test hose. An accelerated aging test is conducted on the test hose, and material aging tests and mechanical aging tests are performed on the test hose during the accelerated aging test. The obtained test data are recorded as material test data and mechanical test data, respectively. The advantage of this approach is that by obtaining testable points and conducting accelerated aging tests, weaker points in the nuclear power hose can be identified, allowing for testing of easily aging locations and improving the effectiveness of predictions based on test results. Furthermore, accelerated aging tests can increase the aging rate of the hose, thereby reducing the testing time and improving the efficiency of obtaining prediction data. By conducting material aging tests and mechanical aging tests, the changes in the service life of the hose throughout its entire life cycle can be detected effectively and specifically during the accelerated aging test. The test results are quantified in terms of materials and stress, making the prediction of hose life more intuitive and effective, thus achieving real-time and efficient detection of hose wear and tear.

[0041] This application also analyzes material test data and mechanical test data, and obtains material confinement areas and mechanical confinement areas based on the analysis results; finally, it uses material aging tests and mechanical aging tests to test the nuclear power hose to be predicted, and predicts the life of the nuclear power hose based on the test data, material confinement areas, and mechanical confinement areas. The advantage of this is that by predicting the life of the nuclear power hose based on material confinement areas and mechanical confinement areas, it is possible to effectively detect the material wear life and overall stress wear life of each location in the hose in real time based on the detection data when the nuclear power hose is in use, thereby improving the timeliness and accuracy of life prediction. Attached Figure Description

[0042] Figure 1 This is a flowchart illustrating the steps of the method of the present invention;

[0043] Figure 2 This is a schematic diagram illustrating the acquisition of the hose bending angle and the straight length of the hose according to the present invention.

[0044] Figure 3 This is a schematic diagram illustrating the acquisition of the upper and lower limit curves of the present invention;

[0045] Figure 4 This is a schematic diagram of the electronic device of the present invention. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1, please refer to Figure 1 As shown, this application provides a method for predicting the wear life of flexible hoses used in nuclear power plants, comprising the following steps:

[0048] Step S1: Based on the structure of the nuclear power hose to be predicted, a test hose is built, and multiple testable points are obtained in the test hose; accelerated aging test is carried out on the test hose, and material aging test and mechanical aging test are used to test the test hose during the accelerated aging test, and the obtained test data are recorded as material test data and mechanical test data respectively.

[0049] Step S2: Analyze the material test data and mechanical test data, and obtain the material confinement area and mechanical confinement area based on the analysis results;

[0050] Step S3: Use material aging test and mechanical aging test to test the nuclear power hose to be predicted, and predict the life of the nuclear power hose based on the test data, material limitation area and mechanical limitation area.

[0051] Step S1 includes: Step S101, obtaining the degree of all bends in the flexible hose to be predicted for nuclear power plants, and recording them sequentially as hose bend angle RJ1 to hose bend angle RJ. n Obtain the lengths of all straight hoses in the nuclear power plant hose to be tested, and record them sequentially as hose straight length RZ1 to hose straight length RZ. m Among them, a straight flexible hose is a flexible hose with corners at both ends and no corners in the hose itself;

[0052] In the specific implementation process, for example, during a data analysis, the predicted nuclear power plant hoses, such as... Figure 2 As shown in PP1, analysis reveals that the bending angles of all hoses are α1, α2, α3 and α4, and the straight lengths of all hoses are LL1, LL2, LL3, LL4 and LL5.

[0053] Step S102: Construct a hose of the same material as the nuclear power hose to be predicted, and designate it as the test hose. The test hose should contain n angles, which are the hose bend angles RJ1 to RJ1 respectively. n The corners and m lengths are, in order, the straight length of the hose RZ1 to the straight length of the hose RZ.m Straight flexible hose;

[0054] In the specific implementation process, by constructing a test hose based on the hose bending angle and the hose straight length, it can be ensured that in subsequent tests, the test hose can be used to replace the nuclear power hose to be predicted, and the required life prediction data of all the nuclear power hoses to be predicted can be obtained, thereby improving the accuracy of the life prediction of the nuclear power hoses to be predicted.

[0055] Step S103: Record any point among all the corners of the test hose and the midpoint of all the straight hoses as testable points;

[0056] In the specific implementation process, this solution assumes that the midpoint of the straight hose is the point in the straight hose whose lifespan is most easily worn out. In actual application, the position of the test point can be adjusted according to the vulnerable position in the actual straight hose.

[0057] Step S104, accelerated aging test includes: Step S1041, based on the material properties of the nuclear power hose to be predicted, obtain the temperature at which the nuclear power hose to be predicted can be accelerated aging, and record it as the accelerated aging temperature; simulate the service life of the nuclear power hose to be predicted at the accelerated aging temperature based on AI, and record it as the accelerated service life.

[0058] In the specific implementation process, in this embodiment, the accelerated aging temperature and accelerated service life are set to 125℃ and 1500h respectively, that is, the value of k is 1500. In actual application, the accelerated aging temperature and accelerated service life can be adjusted according to the actual aging condition of the nuclear power hose to be predicted and the material of the hose, to ensure that after the test hose is continuously accelerated in the space of accelerated aging temperature, the service life of the test hose is 0, that is, it is completely aged.

[0059] Step S1042: Place the test hose in a test space at an accelerated aging temperature and maintain it for k hours, where k is the number of hours corresponding to the accelerated service life. The radiation dose and pressure level in the test space are consistent with the radiation dose and pressure level in the space where the nuclear power hose to be predicted is located.

[0060] Step S1043: After the test hose is placed in the test space, material aging test and mechanical aging test are performed on the test hose every j hours, and the test results are recorded as material test data and mechanical test data, respectively. The material test data includes hardness change curve, low corner point and low straight point, and the mechanical test data includes stress-limited area.

[0061] Material aging testing includes: Step SS1, using a specially developed hardness probe, sampling the micro-area of ​​the hose surface at all testable points in the test hose, and recording the sampled objects as hose sampling material RC1 to hose sampling material RC1 respectively. v Among them, the micro-region on the surface of the hose is the area below the surface of the hose that is less than or equal to t mm, and v is greater than or equal to n+m;

[0062] In the specific implementation process, t can be adjusted according to the actual thickness of the test hose. In this scheme, the value of t is set to 2. Since the actual test hose constructed may differ from the nuclear power hose to be predicted, the value of v may be greater than the sum of n and m, that is, there may be more than n corners or more than m straight hoses in the test hose.

[0063] Step SS2: Establish a Cartesian coordinate system, denoted as the sampling hardness analysis coordinate system. The X-axis of the sampling hardness analysis coordinate system is a constant axis, and the Y-axis is in degrees. Sequentially obtain the Shore A hardness of all samples from the flexible tubes, using positive integers 1 to v as the abscissa, and flexible tube sampling material RC1 to flexible tube sampling material RC... v The Shore A hardness is used as the ordinate to mark points in the sampling hardness analysis coordinate system, and these points are recorded as hardness marks; the curve obtained by fitting all hardness marks is recorded as the hardness variation curve.

[0064] Step SS3: Record the point with the smallest ordinate among the hardness markers corresponding to the testable points at the corner as the low corner point; record the point with the smallest ordinate among the hardness markers corresponding to the testable points in the straight hose as the low straight point.

[0065] In the specific implementation process, by acquiring the hardness change curve, low corner point, and low straight point, the Shore A hardness corresponding to the relatively weak location in the test hose at this time can be characterized by feature extraction. This allows us to obtain the Shore A hardness change at the relatively weak location in the test hose at this time, as well as the lowest Shore A hardness in the corner and straight hose. This is beneficial for judging the wear and tear of the corner and straight hose of the nuclear power hose to be predicted in real time during subsequent analysis.

[0066] Before the test tube is placed into the test space, fluorescent optical fibers are embedded in the tube reinforcement layer at all testable points of the test tube. The mechanical aging test includes: Step DD1, establishing a Cartesian coordinate system with constant X and Y axes, and denoting it as the stress analysis coordinate system; within the stress analysis coordinate system, obtaining a v-sided polygon centered at the origin, with each fixed point 1 inch away from the origin; and sequentially mapping each testable point to all vertices of the v-sided polygon.

[0067] Step DD2: When the first mechanical aging test is performed after the test tube is placed into the test space, obtain the length of the fluorescent fiber at all testable points and record it as the first fiber length at the testable points.

[0068] Step DD3: For any test from the second mechanical aging test to the u-th mechanical aging test after the test tube is placed in the test space: For any testable point, obtain the length of the fluorescent fiber at the testable point and record it as the subsequent test length. Divide the subsequent test length by the initial fiber length at the testable point and record it as the subsequent test ratio. In the ray with the origin as the endpoint and the vertex corresponding to the testable point as the direction, the point whose distance from the origin is the subsequent test ratio is recorded as the subsequent test point. Obtain the subsequent test points of all testable points and record the v-sided shape formed by all subsequent test points as the subsequent test shape, where u is the value of k divided by j and rounded down.

[0069] In practical implementation, for example, during a data analysis, if the initial fiber length of a testable point is 1cm and the subsequent test length is 1.2cm, then by calculation, the subsequent test ratio is 1.2. Therefore, a point with a length of 1.2cm from the origin should be marked in the ray with the origin as the endpoint and the vertex corresponding to the testable point as the direction, and recorded as the subsequent test point. By obtaining the subsequent test point and further obtaining the subsequent test shape, the overall situation of stress change in the corner and straight section of the test hose can be obtained, thereby effectively predicting the stress and lifespan of the hose.

[0070] Step DD4: Obtain all subsequent test shapes corresponding to the second mechanical aging test to the uth mechanical aging test, and record the closed region obtained by placing all subsequent test shapes into the same stress analysis coordinate system as the stress-limited region.

[0071] Step S2 includes: Step S201, placing all hardness change curves into the same sampling hardness analysis coordinate system, and recording the area between the upper limit curve and the lower limit curve corresponding to all hardness change curves as the material constraint area. For any straight line A parallel to the Y-axis in the sampling hardness analysis coordinate system, the points with the largest and smallest ordinates among the points where line A coincides with all hardness change curves are recorded as the upper limit point and the lower limit point, respectively. The upper limit points and lower limit points corresponding to all straight lines parallel to the Y-axis in the sampling hardness analysis coordinate system are obtained, and the curve formed by all upper limit points and the curve formed by all lower limit points are recorded as the upper limit curve and the lower limit curve, respectively.

[0072] In specific implementation processes, such as during a single data analysis, the obtained sampling hardness analysis coordinate system in which all hardness variation curves are placed is as follows: Figure 3As shown, curves YB1 to YB4 are all hardness variation curves, and curves SQ and XQ are the upper limit curve and lower limit curve, respectively.

[0073] Step S202: Place all stress-constrained regions into the same stress analysis coordinate system, and process each stress-constrained region separately. Record the region where all stress-constrained regions are located as the mechanical constraint region.

[0074] Step S203: Analyze the material test data and mechanical test data, and obtain the material confinement area and mechanical confinement area based on the analysis results.

[0075] Step S3 includes: Step S301, using material aging test and mechanical aging test to conduct real-time tests on the nuclear power hose to be predicted, and recording the obtained test data as material real-time data and mechanical real-time data respectively;

[0076] Step S302, for real-time material data: Step S3021, when there are points in the low corner points and low straight points in the real-time material data that are not in the material restriction area, the testable points corresponding to the points that are not in the material restriction area are recorded as aged points, and the nuclear power hose to be predicted is marked with aging marks.

[0077] In the specific implementation process, when there are points in the low corner points and low straight points in the real-time material data that are not in the material restriction area, it indicates that there are material changes that are inconsistent with the actual life cycle of the hose. Therefore, these points should be directly recorded as aged points and reported.

[0078] Step S3022: When both the low-angle point and the low-straight point in the real-time material data are within the material restriction area, obtain the point with the smallest difference between the ordinate and the ordinate of the low-angle point in the real-time material data among all the low-angle points corresponding to the test hose within the material restriction area, and record it as the corner reference point; obtain the point with the smallest difference between the ordinate and the ordinate of the low-straight point in the real-time material data among all the low-straight points corresponding to the test hose within the restriction area, and record it as the straight line reference point.

[0079] Step S3023: Obtain the time when the test hose has been placed in the test space during the material aging test corresponding to the corner reference point and the straight reference point, and record them as k1 and k2 respectively; divide k1 and k2 by k and multiply by 100% respectively, and record the resulting values ​​as the percentage of the corner hose's worn life and the percentage of the straight hose's worn life respectively.

[0080] In the specific implementation process, when the percentage of worn-out life of the corner hose and the percentage of worn-out life of the straight hose are 54% and 68% respectively in a data analysis, it means that the maximum worn-out life of the corner hose and the maximum worn-out life of the straight hose in the nuclear power hose to be predicted is 54% and 68% respectively. When the percentage of worn-out life of the corner hose or the percentage of worn-out life of the straight hose is 100%, it means that the life of the corner hose or the straight hose is 0 and it has been completely aged.

[0081] Step S303, for real-time mechanical data: Step S3031, the stress-limited area obtained from the real-time mechanical data is recorded as the real-time stress area, the real-time stress area is placed within the mechanical limitation area, and the stress-limited area within the mechanical limitation area with the largest overlap ratio with the real-time stress area is recorded as the life reference area. The overlap ratio is: the value of the overlap area between the real-time stress area and the stress-limited area divided by the area of ​​the real-time stress area, plus the value of the overlap area between the real-time stress area and the stress-limited area divided by the area of ​​the stress-limited area.

[0082] Step S3032: Record the time when the test hose has been placed in the test space during the mechanical aging test corresponding to the life reference area as k3, divide k3 by k and multiply by 100%, and record the resulting value as the percentage of hose stress loss life.

[0083] In the specific implementation process, for example, during a data analysis, the mechanical aging test corresponding to a life reference area was conducted. During the test, the test hose had been placed in the test space for 800 hours, and the value of k was 1500. Then, through calculation, k3 can be obtained as approximately 53.3%, which indicates that the stress loss in the nuclear power hose to be predicted has reached 53.3% at this time. When k3 is 100%, it indicates that the hose cannot achieve effective strain at this time.

[0084] Example 2, please refer to Figure 4 As shown, Figure 4A schematic diagram of an electronic device is provided, which may include a processor, a communication interface, a memory, and a communication bus. The processor, communication interface, and memory communicate with each other via the communication bus. The memory stores computer-readable instructions, and the processor can call these instructions. When the processor executes a computer-readable instruction, it performs steps similar to those in a method for predicting the wear and tear life of a nuclear power hose, achieving the following functions: First, a test hose is constructed based on the structure of the nuclear power hose to be predicted, and multiple testable points are obtained within the test hose; accelerated aging tests are conducted on the test hose, and material aging tests and mechanical aging tests are performed on the test hose during the accelerated aging tests, with the obtained test data recorded as material test data and mechanical test data, respectively; then, the material test data and mechanical test data are analyzed, and material limitation areas and mechanical limitation areas are obtained based on the analysis results; finally, the material aging test and mechanical aging test are used to test the nuclear power hose to be predicted, and the lifespan of the nuclear power hose is predicted based on the test data, material limitation areas, and mechanical limitation areas.

[0085] Furthermore, the logical instructions in the aforementioned memory can be implemented as software functional units and sold or used as independent products, and can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0086] Example 3: This application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute a method for predicting the wear life of a nuclear power hose provided by the above methods. The method includes: first, constructing a test hose based on the structure of the nuclear power hose to be predicted, and obtaining multiple testable points in the test hose; conducting accelerated aging tests on the test hose, and testing the test hose using material aging tests and mechanical aging tests during the accelerated aging tests, and recording the obtained test data as material test data and mechanical test data respectively; then analyzing the material test data and mechanical test data, and obtaining material limitation areas and mechanical limitation areas based on the analysis results; finally, testing the nuclear power hose to be predicted using material aging tests and mechanical aging tests, and predicting the life of the nuclear power hose based on the test data, material limitation areas, and mechanical limitation areas.

[0087] Example 4: This application also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it performs the steps of the above-described method for predicting the wear and tear life of nuclear power hoses, to achieve the following functions: First, a test hose is constructed based on the structure of the nuclear power hose to be predicted, and multiple testable points are obtained in the test hose; accelerated aging tests are conducted on the test hose, and material aging tests and mechanical aging tests are used to test the test hose during the accelerated aging tests, and the obtained test data are recorded as material test data and mechanical test data, respectively; then, the material test data and mechanical test data are analyzed, and material limitation areas and mechanical limitation areas are obtained based on the analysis results; finally, the material aging tests and mechanical aging tests are used to test the nuclear power hose to be predicted, and the life of the nuclear power hose is predicted based on the test data, material limitation areas, and mechanical limitation areas.

[0088] Based on the above description of the embodiments, the embodiments of the present invention can be provided as methods, systems, or computer program products. Based on this understanding, the technical solutions described above, or the parts that contribute to the prior art, can be embodied in the form of software products. These computer software products can be stored in computer-readable storage media, such as ROM / RAM, magnetic disks, optical disks, etc., and include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or certain parts of the embodiments.

[0089] In the embodiments provided in this application, it should be understood that the disclosed system or method can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of modules or units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple modules or units may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces. The indirect coupling or communication connection between systems, modules, and units may be electrical, mechanical, or other forms.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for predicting the wear and tear life of flexible hoses used in nuclear power plants, characterized in that, Includes the following steps: A test hose was built based on the structure of the nuclear power hose to be predicted, and multiple testable points were obtained in the test hose. The test hose was subjected to accelerated aging test, and material aging test and mechanical aging test were used to test the test hose during the accelerated aging test. The test data obtained were recorded as material test data and mechanical test data, respectively. The material test data and mechanical test data are analyzed, and the material confinement area and mechanical confinement area are obtained based on the analysis results; Material aging tests and mechanical aging tests were used to test the nuclear power hoses to be tested, and the life of the nuclear power hoses was predicted based on the test data, material limitation areas, and mechanical limitation areas. A test hose was constructed based on the structure of the nuclear power plant hose to be predicted, and multiple testable points were obtained within the test hose, including: Obtain the degree measurements of all bends in the flexible hose for nuclear power plants to be predicted, and denot them sequentially as hose bend angle RJ1 to hose bend angle RJ. n Obtain the lengths of all straight hoses in the nuclear power plant hose to be tested, and record them sequentially as hose straight length RZ1 to hose straight length RZ. m Among them, a straight flexible hose is a flexible hose with corners at both ends and no corners in the hose itself; Construct a hose of the same material as the nuclear power hose to be predicted, and denote it as the test hose. The test hose should contain n angles, which are the hose bend angles RJ1 to RJ1 respectively. n The corner, and m lengths successively from the straight length of the hose RZ1 to the straight length of the hose RZ. m Straight flexible hose; Record any point among all the bends in the test hose and the midpoint of all the straight hoses as testable points; Accelerated aging tests include: Based on the material properties of the nuclear power hose to be predicted, the temperature at which the nuclear power hose to be predicted can be accelerated to age is obtained and denoted as the accelerated aging temperature; the service life of the nuclear power hose to be predicted at the accelerated aging temperature is simulated based on AI and denoted as the accelerated service life. The test hose is placed in a test space at the accelerated aging temperature and maintained for k hours, where k is the number of hours corresponding to the accelerated service life. The radiation dose and pressure level in the test space are consistent with the radiation dose and pressure level in the space where the nuclear power hose to be predicted is located. After the test hose is placed in the test space, material aging test and mechanical aging test are performed on the test hose every j hours, and the test results are recorded as material test data and mechanical test data, respectively. Among them, the mechanical test data includes the stress-limited area. Before the test tube is placed into the test space, fluorescent optical fibers are embedded in the tube reinforcement layer at all testable points on the test tube. The mechanical aging test includes: Establish a Cartesian coordinate system with constant X and Y axes, and denote it as the stress analysis coordinate system; within the stress analysis coordinate system, obtain a v-gon centered at the origin, with each vertex 1 inch away from the origin; sequentially map each testable point to all vertices of the v-gon. When the first mechanical aging test is performed after the test tube is placed into the test space, the length of the fluorescent fiber at all testable points is obtained and recorded as the first fiber length at the testable points. For any test from the second mechanical aging test to the u-th mechanical aging test after the test tube is placed in the test space: for any testable point, obtain the length of the fluorescent fiber at the testable point and record it as the subsequent test length. Divide the subsequent test length by the initial fiber length at the testable point and record it as the subsequent test ratio. In the ray with the origin as the endpoint and the vertex corresponding to the testable point as the direction, the point whose distance from the origin is the subsequent test ratio is recorded as the subsequent test point. Obtain the subsequent test points of all testable points and record the v-gon formed by all subsequent test points as the subsequent test shape, where u is the value of k divided by j and rounded down. Obtain all subsequent test shapes corresponding to the second mechanical aging test to the uth mechanical aging test, and denot the closed region obtained by placing all subsequent test shapes into the same stress analysis coordinate system as the stress-constrained region.

2. The method for predicting the wear life of flexible tubing for nuclear power plants according to claim 1, characterized in that, Material aging tests include: Micro-areas on the surface of the test hose were sampled at all testable points, and the sampled samples were denoted as hose sampling material RC1 to hose sampling material RC2, respectively. v Among them, the micro-region on the surface of the hose is the area below the surface of the hose that is less than or equal to t mm, and v is greater than or equal to n+m; Establish a Cartesian coordinate system, denoted as the sampling hardness analysis coordinate system, where the X-axis is a constant axis and the Y-axis is in degrees. Sequentially obtain the Shore A hardness of all samples from the flexible tubes, with positive integers 1 to v as the abscissa and flexible tube sampling material RC1 to flexible tube sampling material RC... v The Shore A hardness is used as the ordinate to mark points in the sampling hardness analysis coordinate system, and these points are recorded as hardness marks; the curve obtained by fitting all hardness marks is recorded as the hardness variation curve. The point with the smallest ordinate among the hardness markers corresponding to the testable points at the corner is recorded as the low corner point; the point with the smallest ordinate among the hardness markers corresponding to the testable points in the straight hose is recorded as the low straight point. The material test data includes the hardness change curve, the low corner point, and the low straight point.

3. The method for predicting the wear and tear life of flexible hoses for nuclear power plants according to claim 2, characterized in that, The material testing data and mechanical testing data are analyzed, and based on the analysis results, the material confinement region and the mechanical confinement region are obtained, including: All hardness variation curves are placed in the same sampling hardness analysis coordinate system, and the area between the upper limit curve and the lower limit curve corresponding to all hardness variation curves is recorded as the material constraint area. For any straight line A parallel to the Y-axis in the sampling hardness analysis coordinate system, the point with the largest and smallest ordinate among the points where line A coincides with all hardness variation curves is recorded as the upper limit point and the lower limit point, respectively. The upper limit points and lower limit points corresponding to all straight lines parallel to the Y-axis in the sampling hardness analysis coordinate system are obtained, and the curve formed by all upper limit points and the curve formed by all lower limit points are recorded as the upper limit curve and the lower limit curve, respectively. All stress-constrained regions are placed in the same stress analysis coordinate system, and each stress-constrained region is processed separately. The region where all stress-constrained regions are located is recorded as the mechanically constrained region. The material test data and mechanical test data are analyzed, and the material confinement area and mechanical confinement area are obtained based on the analysis results.

4. The method for predicting the wear and tear life of flexible tubing for nuclear power plants according to claim 3, characterized in that, The nuclear power hoses to be tested were subjected to material aging tests and mechanical aging tests, and the lifespan of the nuclear power hoses was predicted based on the test data, material confinement areas, and mechanical confinement areas. Material aging tests and mechanical aging tests were used to conduct real-time tests on the nuclear power hoses to be tested, and the test data obtained were recorded as real-time material data and real-time mechanical data, respectively.

5. The method for predicting the wear life of flexible tubing for nuclear power plants according to claim 4, characterized in that, The process of testing nuclear power hoses using material aging tests and mechanical aging tests, and predicting the lifespan of the hoses based on test data, material confinement areas, and mechanical confinement areas, also includes: For real-time material data: When there are points in the low corner points and low straight points that are not in the material restriction area, the testable points corresponding to the points that are not in the material restriction area are marked as aged points, and the nuclear power hoses to be predicted are marked with aging marks. When both the low-angle point and the low-straight point in the real-time material data are within the material restriction area, obtain the point with the smallest difference between the ordinate and the ordinate of the low-angle point in the real-time material data among all the low-angle points corresponding to the test hose within the material restriction area, and record it as the corner reference point; obtain the point with the smallest difference between the ordinate and the ordinate of the low-straight point in the real-time material data among all the low-straight points corresponding to the test hose within the restriction area, and record it as the straight line reference point. Obtain the time that the test hose has been placed in the test space during the material aging test corresponding to the corner reference point and the straight reference point, and record it as k1 and k2 respectively; divide k1 and k2 by k and multiply by 100% respectively, and record the resulting values ​​as the percentage of worn life of the corner hose and the percentage of worn life of the straight hose respectively.

6. The method for predicting the wear life of flexible tubing for nuclear power plants according to claim 5, characterized in that, The process of testing nuclear power hoses using material aging tests and mechanical aging tests, and predicting the lifespan of the hoses based on test data, material confinement areas, and mechanical confinement areas, also includes: For real-time mechanical data: the stress-limited region obtained from the real-time mechanical data is recorded as the real-time stress region. The real-time stress region is placed within the mechanical limit region. The stress-limited region within the mechanical limit region with the largest overlap ratio with the real-time stress region is recorded as the life reference region. The overlap ratio is: the value of the overlap area between the real-time stress region and the stress-limited region divided by the area of ​​the real-time stress region, plus the value of the overlap area between the real-time stress region and the stress-limited region divided by the area of ​​the stress-limited region. The mechanical aging test corresponding to the life reference area is recorded as k3, which is the time when the test hose has been placed in the test space. k3 is divided by k and multiplied by 100%, and the resulting value is recorded as the percentage of hose stress loss life.

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