Stress adjusting method and system of steel branch pipe structure and electronic equipment

Abstract

The invention provides a stress adjusting method and system of a steel branch pipe structure and electronic equipment, and relates to the technical field of pipeline safety monitoring of water conservancy and hydropower engineering. The stress adjusting method of the steel bifurcated pipe structure comprises the steps that radial strain data of a main pipe body, gap data between the steel bifurcated pipe structure and surrounding rock and internal water pressure data of the main pipe body are obtained; determining stress data of the main pipe body according to the internal water pressure data and the gap data; and controlling the dynamic compensation layer to generate phase change according to the radial strain data and the stress data so as to enhance the constraint of the dynamic compensation layer on the pressure bearing layer. The stress rigidity of the steel bifurcated pipe structure is improved, and then the adaptability of the steel bifurcated pipe structure to stress from real-time changes is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline safety monitoring of water conservancy and hydropower projects, and in particular to a stress adjustment method, system and electronic equipment for a steel bifurcated pipe structure. Background Art

[0002] In water conservancy and hydropower projects, the steel bifurcated pipe is a key part of the water diversion system and undertakes the important task of distributing the main water flow to the branch pipe. Among them, for the buried steel bifurcated pipe arranged in the lower flat section of the water diversion system, the internal water pressure of the steel bifurcated pipe is large, and the HD value of the steel bifurcated pipe (the performance index of the steel bifurcated pipe when bearing the head pressure) is high. Under the influence of the hydraulic transition process, the internal water pressure of the steel bifurcated pipe fluctuates frequently, making the steel bifurcated pipe prone to stress concentration. If it is in this state for a long time, it will accelerate the process of fatigue damage and seriously threaten the safe and stable operation of the steel bifurcated pipe.

[0003] In the related art, static methods such as increasing the wall thickness of the steel bifurcation pipe and adding crescent ribs at the Y-shaped structure of the steel bifurcation pipe are mainly used to strengthen the stress stiffness of the steel bifurcation pipe. However, since the liquid pressure flowing through the steel bifurcation pipe changes in real time and is not constant, the above-mentioned static methods make the steel bifurcation pipe less adaptable to the stress caused by real-time changes. Summary of the invention

[0004] The problem solved by the invention is how to effectively adjust the stress stiffness of the steel bifurcated pipe structure and improve the adaptability.

[0005] In order to solve the above problems, the present invention provides a stress adjustment method, system and electronic equipment for a steel bifurcated pipe structure.

[0006] In a first aspect, the present invention provides a stress adjustment method for a steel bifurcated pipe structure, wherein the steel bifurcated pipe structure comprises a pressure-bearing layer and a dynamic compensation layer arranged from the inside to the outside, wherein the pressure-bearing layer comprises a main pipe body in a Y-shaped structure, wherein the main pipe body is used for circulating liquid; and the outside of the steel bifurcated pipe structure is used for setting surrounding rock; wherein the stress adjustment method comprises: Acquire radial strain data of the main pipe body, gap data between the steel bifurcated pipe structure and the surrounding rock, and internal water pressure data of the main pipe body; Determining stress data of the main pipe according to the internal water pressure data and the gap data; According to the radial strain data and the stress data, the dynamic compensation layer is controlled to produce a phase change, so as to strengthen the constraint of the dynamic compensation layer on the pressure-bearing layer.

[0007] Optionally, controlling the dynamic compensation layer to produce a phase change according to the radial strain data and the stress data includes: Determine whether the radial strain data and the stress data meet a preset condition; If the preset condition is met, control the dynamic compensation layer to generate a phase change.

[0008] Optionally, the preset condition includes: The radial strain data is greater than a first threshold, and / or the stress data is greater than a second threshold.

[0009] Optionally, the dynamic compensation layer includes a damping part, a deformation part, and a protection part arranged from the inside to the outside. The deformation part includes a shape memory alloy wire mesh and two heating wire meshes, and the corresponding heating wire meshes are respectively arranged on the opposite side surfaces of the shape memory alloy wire mesh.

[0010] Optionally, the determining the stress data of the main pipe body according to the internal water pressure data and the gap data includes: Input the internal water pressure data and the gap data into finite element analysis software, and output the stress data of the main pipe body through the finite element analysis software.

[0011] Optionally, the stress adjustment method further includes: Perform preprocessing on the radial strain data and the gap data respectively. The preprocessing at least includes wavelet processing and normalization processing.

[0012] In a second aspect, the present invention provides a stress adjustment system for a steel bifurcation pipe structure, including: A steel bifurcation pipe structure, which includes a pressure-bearing layer and a dynamic compensation layer arranged from the inside to the outside. The pressure-bearing layer includes a main pipe body in a Y-shaped structure, and the inside of the main pipe body is used for liquid circulation; the outside of the steel bifurcation pipe structure is used for arranging surrounding rock; A processor, configured to: Obtain the radial strain data of the main pipe body, the gap data between the steel bifurcation pipe structure and the surrounding rock, and the internal water pressure data of the main pipe body; Determine the stress data of the main pipe body according to the internal water pressure data and the gap data; Control the dynamic compensation layer to generate a phase change according to the radial strain data and the stress data, so as to strengthen the constraint of the dynamic compensation layer on the pressure-bearing layer.

[0013] Optionally, the steel bifurcation pipe structure further includes a sensing layer, and the sensing layer includes a plurality of strain detection devices and a plurality of gap detection devices. The plurality of strain detection devices are arranged on the main pipe body at intervals, and the plurality of gap detection devices are arranged between the main pipe body and the surrounding rock at intervals.

[0014] Optionally, the dynamic compensation layer includes a damping part, a deformation part, and a protection part arranged from the inside to the outside. The deformation part includes a shape memory alloy wire mesh and two heating wire meshes, and the corresponding heating wire meshes are respectively arranged on the opposite side surfaces of the shape memory alloy wire mesh; A plurality of repair structures are arranged on one side of the damping part facing the pressure-bearing layer, and a repair agent is used to be contained in the repair structures.

[0015] In a third aspect, the present invention provides an electronic device, including a memory and a processor; The memory is used to store a computer program; The processor is used to, when executing the computer program, implement the stress adjustment method of the steel bifurcation pipe structure as described in the first aspect.

[0016] The beneficial effects of the stress adjustment method, system, and electronic device of the steel bifurcation pipe structure of the present invention are as follows: Obtain the internal water pressure data of the main pipe body and the gap data between the steel bifurcation pipe structure and the surrounding rock, so as to provide basic data for obtaining the stress data borne by the main pipe body subsequently; obtain the radial strain data of the main pipe body, and based on the stress data of the main pipe body, provide accurate mechanical data for accurately adjusting the stress stiffness of the steel bifurcation pipe structure subsequently. According to the radial strain data and the stress data of the main pipe body, the phase change of the dynamic compensation layer can be controlled to strengthen the constraint of the dynamic compensation layer on the pressure-bearing layer through active contraction. In short, through the synergistic effect of the pressure-bearing layer and the dynamic compensation layer, not only can the stress concentration phenomenon at high-risk parts such as the bifurcation of the Y-shaped structure and the weld area of the steel bifurcation pipe structure be blunted, but also when the internal water pressure of the liquid inside the steel bifurcation pipe structure suddenly increases, the dynamic compensation layer actively contracts to provide a "pre-tightening" force for the pressure-bearing layer, improve the stress stiffness of the steel bifurcation pipe structure, and further improve the adaptability of the steel bifurcation pipe structure to the stress from real-time changes. Description of the Drawings

[0017] Figure 1 It is a flowchart of a stress adjustment method of a steel bifurcation pipe structure according to an embodiment of the present invention; Figure 2 It is a logic diagram of a stress adjustment method of a steel bifurcation pipe structure according to an embodiment of the present invention; Figure 3 It is a partial structural schematic diagram of a steel bifurcation pipe structure according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a pressure-bearing layer according to an embodiment of the present invention; Figure 5 It is a partial structural schematic diagram of a dynamic compensation layer according to an embodiment of the present invention; Figure 6 It is a sectional structural schematic diagram of a steel bifurcation pipe structure according to an embodiment of the present invention; Figure 7 The stress adjustment device for the steel bifurcation pipe structure according to the embodiment of the present invention; Figure 8 The structural schematic diagram of an electronic device according to the embodiment of the present invention.

[0018] Explanation of reference numerals: 1 - pressure-bearing layer; 110 - main pipe body; 111 - main bifurcation pipe body; 112 - branch bifurcation pipe body; 120 - main conical pipe body; 130 - branch conical pipe body; 140 - rib plate; 2 - dynamic compensation layer; 21 - damping part; 22 - deformation part; 221 - shape memory alloy wire mesh; 222 - heating wire mesh; 23 - protection part; 3 - sensing layer; 31 - strain detection device; 32 - gap detection device; 33 - crack detection device; 4 - surrounding rock; 500 - stress adjustment device for the steel bifurcation pipe structure; 510 - acquisition module; 520 - determination module; 530 - stress adjustment module; 600 - electronic device; 610 - memory; 620 - processor. Specific embodiments

[0019] To make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments described herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not used to limit the protection scope of the present invention.

[0020] It should be understood that the various steps recorded in the method embodiments of the present invention can be executed in different orders and / or executed in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this regard.

[0021] The term "including" and its variants used herein are open-ended, that is, "including but not limited to"; the term "based on" is "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order of functions executed by these devices, modules or units or their interdependent relationships.

[0022] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0023] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0024] In water conservancy and hydropower projects, steel bifurcated pipes, as a key part of the water diversion system, undertake the important task of distributing the main water flow to the branch pipes. Especially in the field of pumped storage power station projects, underground buried steel bifurcated pipes have been widely used due to their significant advantages of being able to bear part of the internal water pressure by combining with the surrounding rock and taking advantage of the elastic resistance of the surrounding rock.

[0025] However, underground buried steel bifurcated pipes face many severe challenges in actual operation. On the one hand, the buried steel bifurcated pipes are arranged in the lower horizontal section of the water diversion system, with high internal water pressure and high HD value of the steel bifurcated pipes (performance index of the steel bifurcated pipes when bearing head pressure); at the same time, affected by the hydraulic transition process, the internal water pressure of the steel bifurcated pipes fluctuates frequently. Under this complex stress state, the steel bifurcated pipes are prone to stress concentration. If they are in this state for a long time, the process of fatigue damage will be accelerated, which will seriously threaten the safe and stable operation of the steel bifurcated pipes. On the other hand, due to the complex three-dimensional special-shaped structure of the steel bifurcated pipes, the welding work of the steel bifurcated pipes is extremely difficult. Specifically, the welding residual stress generated during the welding process is difficult to eliminate by conventional means. The water pressure test of the steel bifurcated pipes is only to passivate the defect tip of the welding residual stress and reduce the residual stress after welding, but it cannot completely eliminate the residual stress, which further increases the safety hazards of the steel bifurcated pipes.

[0026] In the related art, static methods are mainly used, such as increasing the wall thickness of the steel bifurcation pipe, adding crescent ribs at the Y-shaped structure of the steel bifurcation pipe, or adjusting the crescent rib width ratio. However, these methods make the steel bifurcation pipe less adaptable to stresses caused by real-time changes.

[0027] In view of the problems existing in the above-mentioned related technologies, the embodiments of the present invention provide a stress adjustment method, system and electronic equipment for a steel bifurcated pipe structure.

[0028] like Figure 3 and Figure 4 As shown, the steel bifurcated pipe structure includes a pressure-bearing layer 1, a dynamic compensation layer 2 and a sensing layer 3 arranged from inside to outside.

[0029] The pressure-bearing layer 1 includes a main pipe body 110 with a Y-shaped structure, and the main pipe body 110 is used for liquid circulation; specifically, the main pipe body 110 includes a main branch pipe body 111 and two branch pipe bodies 112. The two branch pipe bodies 112 are respectively connected to the main branch pipe body 111 and form a Y-shaped structure, which can be similar to a tee structure. The pressure-bearing layer 1 further includes a rib plate 140. The rib plate 140 can be formed by welding at the connection of two adjacent branch pipe bodies 112 to form a weld structure. The shape of the rib plate 140 can be a crescent rib plate. The rib plate 140 can redistribute the stress of the steel bifurcation pipe structure, not only effectively reducing the initial stress concentration coefficient of the pipe wall of the steel bifurcation pipe structure, but also strengthening the connection strength between two adjacent branch pipe bodies 112. The pressure-bearing layer 1 further includes a main cone pipe body 120 and two branch cone pipe bodies 130. The end parts of each branch pipe body 112 far from the main branch pipe body 111 are respectively connected to the corresponding branch cone pipe bodies 130, and the end part of the main branch pipe body 111 far from the branch pipe bodies 112 is connected to the corresponding main cone pipe body 120. Among them, the pressure-bearing layer 1 in the entire steel bifurcation pipe structure can adopt a high-strength quenched and tempered steel of 800 MPa grade.

[0030] The dynamic compensation layer 2 is coated on the outer surface of the pressure-bearing layer 1.

[0031] The outside of the steel bifurcation pipe structure is used to set the surrounding rock 4.

[0032] Combined Figure 1 As shown, a stress adjustment method for a steel bifurcation pipe structure provided by an embodiment of the present invention includes: S110. Obtain the radial strain data of the main pipe body 110, the gap data between the steel bifurcation pipe structure and the surrounding rock 4, and the internal water pressure data of the main pipe body 110.

[0033] Specifically, the main pipe body 110 is used for liquid circulation; the main pipe body 110 can be understood as the part in the steel bifurcation pipe structure that bears the maximum extrusion pressure of the surrounding rock 4 and the internal water pressure.

[0034] In some embodiments, combined Figure 3 and Figure 6As shown in the figure, the steel bifurcated pipe structure further includes a sensing layer 3. The sensing layer 3 includes a plurality of strain detection devices 31 and a plurality of gap detection devices 32. Among them, the plurality of strain detection devices 31 can be arranged at intervals on the outer wall of the main pipe body 110. Specifically, a plurality of strain detection devices 31 can be arranged on the outer walls of the main bifurcated pipe body 111 and the branch bifurcated pipe body 112 of the main pipe body 110 respectively, so as to detect the radial strain data of the main bifurcated pipe body 111 and the radial strain data of the branch bifurcated pipe body 112 respectively, thereby expanding the acquisition range of the radial strain data of the main pipe body 110. Among them, the strain detection device 31 can adopt the form of a steel plate gauge; the steel plate gauge can adopt the differential resistance type, and the resolution can be ≤0.1%F·S. Among them, the radial strain data can be understood as the radial deformation value generated by the comprehensive acting forces such as the extrusion force of the surrounding rock on the main pipe body 110 and the water hammer force of the internal flowing liquid on the main pipe body 110 caused by the internal water pressure.

[0035] In addition, the plurality of gap detection devices 32 can be fixed between the steel bifurcated pipe structure and the surrounding rock by means of pasting, and the gap data between the steel bifurcated pipe structure and the surrounding rock 4 can be detected through the gap detection devices 32. Among them, the gap data can be understood as the spacing value between the steel bifurcated pipe structure and the surrounding rock 4. The gap detection device 32 can adopt a gap gauge, and the resolution can be ≤0.1%F·S.

[0036] The internal water pressure data of the main pipe body 110 can be understood as the pressure value of the flowing liquid in the main pipe body 110 on the main pipe body 110.

[0037] The internal water pressure data of the main pipe body 110 can be obtained by testing during the process of introducing high-speed flowing liquid into the main pipe body 110, and can be detected and obtained by using existing technologies such as sensors for detecting fluid pressure.

[0038] S120. Determine the stress data of the main pipe body 110 according to the internal water pressure data and the gap data.

[0039] Specifically, software or calculation formulas can be used to operate on the internal water pressure data and the gap data to calculate the stress data of the main pipe body 110.

[0040] S130. Control the phase change of the dynamic compensation layer 2 according to the radial strain data and the stress data to strengthen the constraint of the dynamic compensation layer 2 on the pressure-bearing layer 1.

[0041] Specifically, according to the radial strain data and the stress data of the main pipe body 110, the dynamic compensation layer 2 can be heated to cause the dynamic compensation layer 2 to undergo a phase change, so as to use the active contraction of the dynamic compensation layer 2 to constrain the pressure-bearing layer 1, thereby improving the stress stiffness of the steel bifurcated pipe structure.

[0042] In this embodiment, the internal water pressure data of the main pipe body 110 and the gap data between the steel bifurcated pipe structure and the surrounding rock are obtained, so as to provide basic data for obtaining the stress data borne by the main pipe body 110 subsequently; the radial strain data of the main pipe body 110 and the stress data of the main pipe body 110 are obtained to provide accurate mechanical data for accurately adjusting the stress data of the steel bifurcated pipe structure subsequently. According to the radial strain data and the stress data of the main pipe body 110, the phase change of the dynamic compensation layer 2 can be controlled to strengthen the constraint of the dynamic compensation layer 2 on the pressure-bearing layer 1 through active contraction. In short, through the synergistic effect of the pressure-bearing layer 1 and the dynamic compensation layer 2, not only can the stress concentration phenomenon at high-risk parts such as the bifurcation and weld area of the Y-shaped structure of the steel bifurcated pipe structure be passivated, but also when the internal water pressure of the liquid inside the steel bifurcated pipe structure suddenly increases, the dynamic compensation layer 2 actively contracts to provide a "pre-tightening" force for the pressure-bearing layer 1, improving the stress stiffness of the steel bifurcated pipe structure, and further improving the adaptability of the steel bifurcated pipe structure to the stress that changes in real time.

[0043] Optionally, the following method can be used to determine whether to control the phase change of the dynamic compensation layer 2. For example, S130, controlling the phase change of the dynamic compensation layer 2 according to the radial strain data and the stress data includes: S131, determining whether the radial strain data and the stress data meet the preset conditions; S132, if the preset conditions are met, controlling the phase change of the dynamic compensation layer 2.

[0044] Specifically, by determining whether the radial strain data and the stress data meet the preset conditions, the phase change of the dynamic compensation layer 2 can be correspondingly controlled.

[0045] For example, if the radial strain data and the stress data meet the preset conditions, the phase change of the dynamic compensation layer 2 is controlled; if the radial strain data and the stress data do not meet the preset conditions, the phase change of the dynamic compensation layer 2 is not controlled.

[0046] In this optional embodiment, by determining whether the radial strain data and the stress data meet the preset conditions to control whether the dynamic compensation layer 2 undergoes a phase change, it is possible to control the dynamic compensation layer 2 to undergo a corresponding phase change according to the real-time changing radial strain data and stress data generated by the flowing liquid in the main pipe body 110, so as to achieve dynamic compensation of the stress stiffness of the steel bifurcated pipe, not only extending the service life of the steel bifurcated pipe structure, but also reducing manual intervention and enhancing the safety and economy of the steel bifurcated pipe structure in underground concealed projects.

[0047] Optionally, the preset conditions include: The radial strain data is greater than the first threshold, and / or the stress data is greater than the second threshold.

[0048] Specifically, the first threshold can be understood as the maximum value of the radial strain corresponding to the maximum radial deformation of the main pipe body 110 and when cracks are about to occur. The second threshold can be understood as the maximum stress value that the main pipe body 110 can withstand when it undergoes the maximum deformation.

[0049] The preset conditions for controlling the phase change of the dynamic compensation layer 2 can be divided into the following three cases. For example, if the radial strain data is greater than the first threshold, then control the dynamic compensation layer 2 to undergo a phase change; or, if the stress data is greater than the second threshold, then control the dynamic compensation layer 2 to undergo a phase change; or, if the radial strain data is greater than the first threshold and the stress data is greater than the second threshold, then control the dynamic compensation layer 2 to undergo a phase change.

[0050] In this alternative embodiment, by setting the above three cases as the preset conditions for controlling whether the dynamic compensation layer 2 undergoes a phase change, in short, the number of preset conditions for controlling the phase change of the dynamic compensation layer 2 can be increased, so as to increase the reliability of the phase change of the dynamic compensation layer 2, enabling the dynamic compensation layer 2 to more accurately constrain the pressure-bearing layer 1, and correspondingly more effectively improving the stress stiffness of the steel bifurcated pipe structure, and further improving the service life of the steel bifurcated pipe structure.

[0051] Optionally, as shown in Figure 5 The dynamic compensation layer 2 can be composed of a composite elastomer with a gradient. For example, the dynamic compensation layer 2 includes a damping part 21, a deformation part 22, and a protection part 23 arranged from the inside to the outside. The deformation part 22 includes a shape memory alloy wire mesh 221 and two heating wire meshes 222, and the corresponding heating wire meshes 222 are respectively arranged on the opposite side surfaces of the shape memory alloy wire mesh 221.

[0052] Specifically, the inner side of the dynamic compensation layer 2 can be understood as the side of the dynamic compensation layer 2 facing the pressure-bearing layer 1; the outer side of the dynamic compensation layer 2 can be understood as the side of the dynamic compensation layer 2 facing away from the pressure-bearing layer 1.

[0053] The damping part 21 can be made of high damping polyurethane (Shore A60 - 80 hardness). The damping part 21 can be closely attached to the pressure-bearing layer 1 and can be used to absorb part of the stress by elastic deformation under the normal internal water pressure of the steel bifurcated pipe structure.

[0054] The protection part 23 can be used as the outermost layer structure of the dynamic compensation layer 2. For example, it can be made of carbon fiber reinforced epoxy resin and is used to protect the deformation part 22 by increasing its own tensile strength.

[0055] The deformation part 22 may include a shape memory alloy wire mesh 221 located in the middle area, and heating wire meshes 222 arranged on the inner and outer sides of the shape memory alloy wire mesh 221; wherein, the shape memory alloy wire mesh 221 may adopt TiNi-SS alloy (such as superelastic titanium nickel alloy) with a phase change temperature of 5°C to 15°C; and the heating wire mesh 222 may adopt a resistance wire mesh structure, and the distance between two adjacent heating wire meshes 222 may be 1.5cm to 2.5cm.

[0056] A cable pipe (such as a PVC pipe) may be arranged outside the sensing layer 3 of the steel branch pipe structure, and cables (such as power lines, signal lines) may be passed through the cable pipe. Later, the steel branch pipe structure and the cable pipe may be buried in concrete.

[0057] The end of the cable extends out of the concrete, one end of the power wire in the cable is electrically connected to the heating wire mesh, and the other end of the power wire extending out of the concrete is electrically connected to an external power supply device (such as a power cabinet, a power module, etc.) to output electrical energy through the power supply device to power on and heat the heating wire mesh, or power off and not heat it.

[0058] One end of each signal line is electrically connected to the strain detection device 31, the gap detection device 32, and the crack detection device 33 respectively, and the other end of each signal line extending out of the concrete can be electrically connected to the stress adjustment device 500 of the steel bifurcated pipe structure.

[0059] In this optional embodiment, the working mechanism of the dynamic compensation layer 2 can be as follows: under normal internal water pressure, the damping part 21 absorbs part of the stress through elastic deformation. Figure 2 As shown, it is determined whether the radial strain data and the stress data meet the preset conditions. When encountering a sudden increase in the internal water pressure of the main body 110 or a water hammer pressure when the guide vanes of the hydroelectric generator set are quickly closed, for example, the radial strain data is greater than the first threshold, and / or the stress data is greater than the second threshold, the two heating screens 222 of the deformation part 22 are controlled to heat, and the temperature is raised to the phase transition temperature of the shape memory alloy screen 221, and the deformation part 22 undergoes a phase change. For example, the shape memory alloy screen 221 triggers a martensitic phase transformation after being heated, and actively contracts and "tightens" the deformation part to strengthen the constraint on the pressure-bearing layer 1 and improve the stress stiffness of the steel branch pipe structure.

[0060] If the radial strain data is less than or equal to the first threshold value, and the stress data is less than or equal to the second threshold value, the two heating screens 222 of the deformation part 22 are not controlled to be heated, and accordingly the deformation part 22 does not undergo phase change.

[0061] Optionally, determining the stress data of the main body 110 according to the internal water pressure data and the gap data includes: The internal water pressure data and the gap data are input into finite element analysis software, and the stress data of the main pipe 110 is output through the finite element analysis software.

[0062] Specifically, the finite element analysis software may be a calculation model of ANSYS software, and the calculation model may use the finite element analysis software (4-node Shell63 shell element in ANSYS) to mesh the steel bifurcated pipe structure.

[0063] The calculation model of the above finite element analysis software can adopt a Cartesian coordinate system, where xoy is the horizontal plane, the vertical direction is the Z axis, upward is positive, the coordinate system forms a right-hand spiral, and the coordinate origin is located at the center of the maximum common tangent sphere of the main fork and the branch fork.

[0064] For buried steel bifurcated pipe structures, the elastic resistance of the surrounding rock 4 on the steel bifurcated pipe structure needs to be considered. This calculation uses the Contac52 point-point contact unit to simulate the joint bearing mechanism of the steel bifurcated pipe structure and the surrounding rock 4. The positive displacement of the contact unit makes the gap tend to open, and the positive displacement causes the gap to break away from contact, the unit normal force is 0, and no load is transmitted; when a negative displacement occurs, the gap remains in contact, and the unit transmits a negative normal force that is linearly related to the displacement. At this time, the contact unit behaves as a linear spring, and its reverse action on the pipe wall node of the steel bifurcated pipe structure is equivalent to the elastic resistance of the surrounding rock 4 to the steel bifurcated pipe structure.

[0065] In this optional embodiment, the internal water pressure data and the gap data are input into the finite element analysis software, and the stress data of the main pipe 110 can be output more quickly and accurately through the finite element analysis software, thereby providing accurate data support for the subsequent precise control of the dynamic compensation layer 2 to constrain the pressure-bearing layer 1.

[0066] Optionally, the stress adjustment method further includes: The radial strain data and the gap data are preprocessed respectively, and the preprocessing at least includes wavelet processing and normalization processing.

[0067] Specifically, combined Figure 2 As shown, a preprocessing module may be used to preprocess the radial strain data and the gap data respectively to form preprocessed radial strain data and preprocessed gap data respectively.

[0068] Taking the preprocessing of radial strain data as an example, for example: (1) Example of obtaining original data: Assume that a strain detection device 31 collects a segment of noisy radial strain data at the bifurcation of a steel bifurcated pipe structure, with a sampling frequency of 100 Hz and a duration of 10 seconds (a total of 1000 data points).

[0069] The first 10 sampling points can be used as a raw data segment.

[0070] (2)Wavelet processing example: First, perform the first processing on the above-mentioned radial strain data through wavelet decomposition. Subsequently, perform the second processing on the radial strain data after wavelet decomposition through threshold filtering denoising. Then, perform the third processing on the denoised radial strain data through signal reconstruction to obtain relatively real radial strain data.

[0071] (3)Normalization processing example: Perform normalization processing on the radial strain data after wavelet processing to form standard radial strain data.

[0072] The preprocessing method for the gap data is the same as the preprocessing method for the above-mentioned radial strain data, and will not be elaborated here.

[0073] In this optional embodiment, preprocess the radial strain data and the gap data respectively. The preprocessing includes at least wavelet processing and normalization processing. Thus, the finite element analysis software can be used to preprocess the original radial strain data and original gap data containing noise, and output more standard characteristic data (such as the preprocessed radial strain data and the preprocessed gap data). In short, to identify the stress concentration area of the steel bifurcation pipe structure, and calculate the future stress area of the steel bifurcation pipe structure according to the finite element analysis software, so as to trigger the automatic compensation action of the deformation part 22 of the dynamic compensation layer 2 on the pressure-bearing layer 1, and effectively adjust the stress stiffness of the steel bifurcation pipe structure in a timely manner according to the radial strain and stress changes of the steel bifurcation pipe structure, so as to realize the synchronous monitoring, real-time feedback and control of the stress-temperature-displacement of the steel bifurcation pipe structure.

[0074] Combined with Figure 7 As shown in, a stress adjustment device 500 for a steel bifurcation pipe structure provided by an embodiment of the present invention. The steel bifurcation pipe structure includes a pressure-bearing layer 1 and a dynamic compensation layer 2 arranged from inside to outside. The pressure-bearing layer 1 includes a main pipe body 110 with a Y-shaped structure, and the main pipe body 110 is used for liquid circulation; the outside of the steel bifurcation pipe structure is used to set the surrounding rock 4; the stress adjustment device includes: An acquisition module 510, configured to acquire the radial strain data of the main pipe body 110, the gap data between the steel bifurcation pipe structure and the surrounding rock 4, and the internal water pressure data of the main pipe body 110; A determination module 520, configured to determine the stress data of the main pipe body 110 according to the internal water pressure data and the gap data; A stress adjustment module 530, configured to control the dynamic compensation layer 2 to generate a phase change according to the radial strain data and the stress data, so as to strengthen the constraint of the dynamic compensation layer 2 on the pressure-bearing layer 1.

[0075] Optionally, controlling the dynamic compensation layer 2 to generate a phase change according to the radial strain data and the stress data includes: Determining whether the radial strain data and the stress data meet a preset condition; If the preset condition is met, controlling the dynamic compensation layer 2 to generate a phase change.

[0076] Optionally, the preset condition includes: The radial strain data is greater than a first threshold, and / or the stress data is greater than a second threshold.

[0077] Optionally, the dynamic compensation layer 2 includes a damping part 21, a deformation part 22, and a protection part 23 arranged from the inside to the outside. The deformation part 22 includes a shape memory alloy wire mesh 221 and two heating wire meshes 222. The corresponding heating wire meshes 222 are respectively arranged on the opposite side surfaces of the shape memory alloy wire mesh 221.

[0078] Optionally, determining the stress data of the main pipe body 110 according to the internal water pressure data and the gap data includes: Inputting the internal water pressure data and the gap data into finite element analysis software, and outputting the stress data of the main pipe body 110 through the finite element analysis software.

[0079] Optionally, the stress adjustment method further includes: Performing preprocessing on the radial strain data and the gap data respectively. The preprocessing at least includes wavelet processing and normalization processing.

[0080] As Figure 3 、 Figure 4 、 Figure 6 and Figure 8 shown, a stress adjustment system for a steel bifurcation pipe structure provided by an embodiment of the present invention includes: A steel bifurcation pipe structure, which includes a pressure-bearing layer 1 and a dynamic compensation layer 2 arranged from the inside to the outside. The pressure-bearing layer 1 includes a main pipe body 110 with a Y-shaped structure. The inside of the main pipe body 110 is used for liquid circulation; the outside of the steel bifurcation pipe structure is used to set a surrounding rock 4; A processor 620, configured to: Obtain the radial strain data of the main pipe body 110, the gap data between the steel bifurcation pipe structure and the surrounding rock 4, and the internal water pressure data of the main pipe body 110; Determine the stress data of the main pipe body 110 according to the internal water pressure data and the gap data; Based on the radial strain data and the stress data, control the dynamic compensation layer 2 to generate a phase change, so as to strengthen the constraint of the dynamic compensation layer 2 on the pressure-bearing layer 1.

[0081] Optionally, as shown in Figure 3 and Figure 6 the steel bifurcation pipe structure further includes a sensing layer 3, the sensing layer 3 includes a plurality of strain detection devices 31 and a plurality of gap detection devices 32, a plurality of the strain detection devices 31 are arranged at intervals on the main pipe body 110, and a plurality of the gap detection devices 32 are arranged at intervals between the main pipe body 110 and the surrounding rock.

[0082] Specifically, a plurality of strain detection devices 31 arranged in an annular interval can be respectively arranged on the outer walls of the main bifurcation pipe body 111 and the branch bifurcation pipe body 112 of the main pipe body 110 to respectively monitor the radial strains of the main bifurcation pipe body 111 and the branch bifurcation pipe body 112; a plurality of gap detection devices 32 arranged at intervals can be attached to the contact surface between the steel bifurcation pipe structure and the surrounding rock 4 to monitor the gap between the steel bifurcation pipe structure and the surrounding rock 4.

[0083] In this embodiment, through the synergistic effect of the pressure-bearing layer 1 and the dynamic compensation layer 2, the stress concentration phenomenon at high-risk parts such as the bifurcation and the weld area of the steel bifurcation pipe structure can be passivated; when the internal water pressure suddenly increases or the water hammer pressure occurs when the guide vane of the hydraulic generator unit is quickly closed, the dynamic compensation layer 2 actively shrinks to provide a "pre-tightening" force to constrain the pressure-bearing layer 1, and the maximum stress of the steel bifurcation pipe structure can be reduced.

[0084] The sensing layer 3 further includes a plurality of crack detection devices 33, and a plurality of crack detection devices 33 can be attached to the surface of the dynamic compensation layer 2 (as shown in Figure 6 ) to detect the emission signal (frequency range 10 kHz - 1 MHz) of crack propagation.

[0085] Intelligent operation and maintenance can be realized. By setting the strain detection device 31, the crack detection device 33 and the gap detection device 32, the radial strain, the crack propagation signal and the gap of the steel bifurcation pipe structure are respectively monitored in real time. The internal water pressure data is calculated during the hydraulic transition process, and combined with the finite element analysis software to calculate the stress data of the steel bifurcation pipe structure. At the same time, the radial strain data measured by the strain detection device 31 is compared with the first threshold, and / or the stress data is greater than the second threshold. If it exceeds the respective corresponding threshold, an early warning (such as an alarm) is given, and the heating wire mesh 222 of the deformation part 22 is directly driven to cause the deformation part 22 to generate a phase change to constrain the pressure-bearing layer, improve the stress stiffness of the steel bifurcation pipe structure, and thus form a "perception - analysis - execution" closed loop.

[0086] Furthermore, this embodiment is not only applicable to the underground buried steel bifurcation pipe structure in water conservancy and hydropower projects, but also can be extended to fields such as nuclear power cooling circuits and chemical medium transportation. At the same time, its dynamic compensation layer 2 can be prefabricated and installed, adapting to different burial depths, pipe diameters and geological conditions, which is convenient for popularization and application.

[0087] Optionally, in combination with Figure 5 As shown, the dynamic compensation layer 2 includes a damping part 21, a deformation part 22 and a protection part 23 arranged from the inside to the outside. The deformation part 22 includes a shape memory alloy wire mesh 221 and two heating wire meshes 222. The corresponding heating wire meshes 222 are respectively arranged on the opposite side surfaces of the shape memory alloy wire mesh 221. A plurality of repair structures are arranged on the side of the damping part 21 facing the pressure-bearing layer 1, and the repair structures are used to contain a repair agent.

[0088] Specifically, a plurality of repair structures can be evenly distributed on the side of the damping part 21 facing the pressure-bearing layer 1. The repair structures can adopt a capsule structure, and the diameter of each capsule structure can be 50μm - 200μm. A repair agent is respectively contained in each repair structure, and the repair agent can adopt a polysulfide rubber-based repair liquid.

[0089] In this optional embodiment, after cracks occur in the pressure-bearing layer 1 of the steel bifurcation pipe structure and the cracks extend to the repair structures, the repair structures crack to release the repair liquid at the corresponding cracks, realizing in-situ repair of damage without the need for manual active intervention.

[0090] As Figure 8 shown, an electronic device 600 provided by an embodiment of the present invention includes a memory 610 and a processor 620. The memory 610 is used to store a computer program. The processor 620 is used to implement the stress adjustment method of the steel bifurcation pipe structure as described above when executing the computer program.

[0091] Or rather, an electronic device 600 includes a memory 610 and a processor 620 coupled to the memory 610. The memory 610 is configured to store a computer program. The processor 620 is configured to perform the following operations when executing the computer program: Obtain the radial strain data of the main pipe body 110, the gap data between the steel bifurcation pipe structure and the surrounding rock 4, and the internal water pressure data of the main pipe body 110; Determine the stress data of the main pipe body 110 according to the internal water pressure data and the gap data; Control the dynamic compensation layer 2 to generate a phase change according to the radial strain data and the stress data, so as to strengthen the constraint of the dynamic compensation layer 2 on the pressure-bearing layer 1.

[0092] A computer-readable storage medium provided by an embodiment of the present invention, on which a computer program is stored. When the computer program is executed by a processor 620, the stress adjustment method of the steel bifurcation pipe structure as described above is implemented.

[0093] Or, a non-volatile computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor 620, the processor 620 is caused to perform the following operations: Obtain the radial strain data of the main pipe body 110, the gap data between the steel bifurcation pipe structure and the surrounding rock 4, and the internal water pressure data of the main pipe body 110; Determine the stress data of the main pipe body 110 according to the internal water pressure data and the gap data; Control the phase change of the dynamic compensation layer 2 according to the radial strain data and the stress data, so as to strengthen the constraint of the dynamic compensation layer 2 on the pressure-bearing layer 1.

[0094] Now, an electronic device 600 that can be used as a server or a client of the present invention will be described. It is an example of a hardware device that can be applied to various aspects of the present invention. The electronic device 600 is intended to represent various forms of digital electronic computer devices, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device 600 can also represent various forms of mobile devices, such as, personal digital assistants, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0095] The electronic device 600 includes a computing unit, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory 610 (ROM) or a computer program loaded from a storage unit into a random access memory 610 (RAM). In the RAM, various programs and data required for device operation can also be stored. The computing unit, the ROM, and the RAM are connected to each other through a bus. An input / output (I / O) interface is also connected to the bus.

[0096] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc. In this application, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present invention. In addition, the functional units in each embodiment of the present invention can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0097] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A method for stress adjustment of a steel bifurcation pipe structure, characterized in that, The steel bifurcation structure includes a pressure-bearing layer and a dynamic compensation layer arranged from the inside to the outside. The pressure-bearing layer includes a main pipe body in a Y-shaped structure, and the main pipe body is used for liquid circulation; The outside of the steel bifurcation structure is used to set surrounding rock; wherein, the stress adjustment method includes: Obtain the radial strain data of the main pipe body, the gap data between the steel bifurcation structure and the surrounding rock, and the internal water pressure data of the main pipe body; Determine the stress data of the main pipe body according to the internal water pressure data and the gap data; According to the radial strain data and the stress data, control the dynamic compensation layer to generate a phase change to strengthen the constraint of the dynamic compensation layer on the pressure-bearing layer.

2. The stress adjustment method of the steel bifurcated pipe structure according to claim 1, characterized in that The controlling the dynamic compensation layer to generate a phase change according to the radial strain data and the stress data includes: Judge whether the radial strain data and the stress data meet the preset conditions; If the preset conditions are met, control the dynamic compensation layer to generate a phase change.

3. The stress adjustment method of the steel bifurcation pipe structure according to claim 2, characterized in that The preset conditions include: The radial strain data is greater than a first threshold, and / or, the stress data is greater than a second threshold.

4. The stress adjustment method for the steel bifurcation pipe structure according to claim 2, characterized in that, The dynamic compensation layer includes a damping part, a deformation part and a protection part arranged from the inside to the outside. The deformation part includes a shape memory alloy wire mesh and two heating wire meshes, and the corresponding heating wire meshes are respectively arranged on the opposite side surfaces of the shape memory alloy wire mesh.

5. The stress adjustment method of the steel bifurcation pipe structure according to claim 2, characterized in that, The determining the stress data of the main pipe body according to the internal water pressure data and the gap data includes: Input the internal water pressure data and the gap data into finite element analysis software, and output the stress data of the main pipe body through the finite element analysis software.

6. The stress adjustment method for the steel bifurcation pipe structure according to claim 1, characterized in that The stress adjustment method further includes: Preprocess the radial strain data and the gap data respectively. The preprocessing at least includes wavelet processing and normalization processing.

7. A stress adjustment system for a steel bifurcation pipe structure, characterized in that, including: A steel bifurcation structure, the steel bifurcation structure includes a pressure-bearing layer and a dynamic compensation layer arranged from the inside to the outside. The pressure-bearing layer includes a main pipe body in a Y-shaped structure, and the main pipe body is used for liquid circulation; the outside of the steel bifurcation structure is used to set surrounding rock; A processor, for: Obtain the radial strain data of the main pipe body, the gap data between the steel bifurcation structure and the surrounding rock, and the internal water pressure data of the main pipe body; Determine the stress data of the main pipe body according to the internal water pressure data and the gap data; According to the radial strain data and the stress data, control the dynamic compensation layer to generate a phase change to strengthen the constraint of the dynamic compensation layer on the pressure-bearing layer.

8. The stress adjustment system for the steel bifurcation pipe structure according to claim 7, characterized in that, The steel bifurcation structure further includes a sensing layer, the sensing layer includes a plurality of strain detection devices and a plurality of gap detection devices, and the plurality of strain detection devices are arranged at intervals on the main pipe body, and the plurality of gap detection devices are arranged at intervals between the main pipe body and the surrounding rock.

9. The stress adjustment system for the steel bifurcation pipe structure according to claim 7, characterized in that The dynamic compensation layer includes a damping part, a deformation part and a protection part arranged from the inside to the outside. The deformation part includes a shape memory alloy wire mesh and two heating wire meshes, and the corresponding heating wire meshes are respectively arranged on the opposite side surfaces of the shape memory alloy wire mesh; A plurality of repair structures are arranged on the side of the damping part facing the pressure-bearing layer, and the repair structures are used to contain repair agents.

10. An electronic device, characterized in that, including a memory and a processor; the memory is used for storing a computer program; the processor is used for implementing the stress adjustment method of the steel bifurcation structure according to any one of claims 1 to 6 when executing the computer program.

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