Boiler water wall deformation monitoring method, system and device based on strain measurement

Abstract

The boiler water cooling wall deformation monitoring method, system and device based on strain measurement collect strain measurement values of high-temperature strain gauges on the inner and outer sides of the strip-shaped plate according to a preset time interval; the actual distortion value of a specified monitoring point is calculated by using the strain measurement values of two high-temperature strain gauges of the specified monitoring point; through the mechanism that the bulging of the water cooling wall will cause the bending of the water cooling wall plane, the bending degree of the water cooling wall plane is detected by measuring the water cooling wall plane; due to the high-temperature characteristics of the water cooling wall, the traditional technology cannot realize online measurement of the bulging, cannot know the severity before the fault further evolves, and cannot extract methods and measures; the present application can realize online measurement; for the slight deformation of the water cooling wall, the traditional technology cannot accurately obtain, the present application has high measurement precision in obtaining high-temperature strain values, can amplify the slight deformation, and is more conducive to the identification of early deformation.

Description

Technical Field

[0001] This invention belongs to the field of boiler monitoring technology, specifically relating to a method, system, and device for monitoring boiler water-cooled wall deformation based on strain measurement. Background Technology

[0002] Currently, the water-cooled wall is the main heat-receiving part of the boiler, composed of multiple parallel steel tubes welded together by thin plates. These tubes are distributed around the boiler furnace, forming a closed combustion space. The water-cooled wall tubes contain flowing water or steam, receiving heat from the boiler flames. During operation, localized blockages, dirt, or scale buildup often cause the flow distribution between the water-cooled wall tubes to deviate from the design values, leading to overheating in some tubes. When the temperature difference between adjacent tubes exceeds 50 degrees Celsius, thermal stress can cause bulging, deformation, or even rupture of the water-cooled wall.

[0003] Currently, due to the high-temperature environment inside the boiler, bulging deformation of the water-cooled wall is difficult to measure. Monitoring is only possible after the boiler has been shut down and cooled, when maintenance personnel enter the boiler's interior and visually inspect it. This reliance on manual monitoring fails to detect problems in their early stages, often leading to further deformation, water-cooled wall rupture, and leaks, resulting in unplanned boiler shutdowns. Summary of the Invention

[0004] To address this, the present invention provides a method, system, and device for monitoring boiler water-cooled wall deformation based on strain measurement, enabling online monitoring of boiler water-cooled wall bulging deformation, determining the safety and reliability of boiler water-cooled wall from the early stage of a fault, and solving the problems of traditional methods that rely on manual labor or require monitoring after boiler shutdown, as well as low monitoring accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, a method for monitoring boiler water-cooled wall deformation based on strain measurement is provided, comprising:

[0006] Strain measurements of high-temperature strain gauges on the inside and outside of the strip plate are collected at preset time intervals.

[0007] Calculate the actual deflection value at the specified monitoring point using the strain measurements from two high-temperature strain gauges at the specified monitoring point;

[0008] The formula for calculating the disturbance value h at a specified monitoring point is:

[0009]

[0010]

[0011]

[0012] In the formula, L is the distance between pipes; ε i The strain measurement value of the inner high-temperature strain gauge; ε o The strain measurement value is for the outer high-temperature strain gauge; K is the neutral layer coefficient, which is determined by the inner bending diameter R. i The plate thickness δ is obtained by querying; A is an intermediate variable for strain measurement.

[0013] As a preferred method for monitoring boiler water-cooled wall deformation based on strain measurement, an iterative analysis is performed on the actual deflection value h at a specified monitoring point. The steps of the iterative analysis include:

[0014] Strain measurement value ε of the outer high-temperature strain gauge was collected. i and the strain measurement value ε of the inner high-temperature strain gauge o ;

[0015] Set the initial deflection value h0; calculate the inner diameter of the bend R using formula (3). i ;

[0016] Utilizing the inner diameter R of the bend i The neutral layer coefficient K is obtained by querying the plate thickness δ.

[0017] The iterative deflection value h1 is obtained using formulas (1) and (2);

[0018] Calculate the difference Δh between the iterative deflection value h1 and the initial deflection value h0;

[0019] Determine whether the difference Δh is less than the iteration end threshold Δ0. If the difference Δh is less than the iteration end threshold Δ0, use the iteration deflection value h1 as the deflection value h of the specified monitoring point.

[0020] Secondly, the present invention provides a boiler water-cooled wall deformation monitoring system based on strain measurement, employing the boiler water-cooled wall deformation monitoring method based on strain measurement according to the first aspect or any possible implementation thereof, including a water-cooled wall deformation measurement component, wherein the water-cooled wall deformation measurement component includes a strip plate connected to two water-cooled wall pipes that deforms with the bulging of the water-cooled wall; high-temperature strain gauges are welded to both the inner and outer sides of the center position of the strip plate.

[0021] The high-temperature strain gauge is connected to a strain acquisition instrument via wires. The strain acquisition instrument is used to acquire the measured values ​​of the high-temperature strain gauge. The strain acquisition instrument is connected to an engineering station, which is used to determine the degree of bulging deformation of the boiler water-cooled wall using the measured values ​​of the high-temperature strain gauge.

[0022] As a preferred embodiment of the boiler water-cooled wall deformation monitoring system based on strain measurement, there is a gap between the two water-cooled wall pipes connected by the strip plate, and there are 3 to 6 water-cooled wall pipes between the two water-cooled wall pipes.

[0023] The strip plate is horizontal and is located 2.0m above the burner.

[0024] As a preferred embodiment of the boiler water-cooled wall deformation monitoring system based on strain measurement, the high-temperature strain gauge is welded to the center of the strip plate by spot welding. The high-temperature strain gauge has more than 20 weld points along its long side and more than 10 weld points along its short side.

[0025] As a preferred embodiment of the boiler water-cooled wall deformation monitoring system based on strain measurement, the measured values ​​of the high-temperature strain gauge are:

[0026] Half of the difference between the high-temperature strain gauge readings on the inner side of the center position of the strip plate and the high-temperature strain gauge readings on the outer side of the center position of the strip plate.

[0027] As a preferred solution for a boiler water-cooled wall deformation monitoring system based on strain measurement, the strip plate is modeled using finite element software, and a correspondence is established between the strain measurement value of the strip plate and the bulge deflection value of the water-cooled wall. The bulge deflection value of the water-cooled wall is obtained through the correspondence between the strain measurement value and the bulge deflection value of the water-cooled wall.

[0028] As a preferred solution for boiler water-cooled wall deformation monitoring system based on strain measurement, the bulging deflection value of the water-cooled wall is monitored, and a bulging alarm is triggered when the bulging deflection value of the water-cooled wall exceeds the preset limit.

[0029] Thirdly, the present invention provides a boiler water-cooled wall deformation monitoring device based on strain measurement, comprising:

[0030] The measurement value acquisition module is used to acquire the strain measurement values ​​of the high-temperature strain gauges on the inside and outside of the strip plate at preset time intervals.

[0031] The deflection value calculation module is used to calculate the actual deflection value of a specified monitoring point using the strain measurement values ​​of two high-temperature strain gauges at the specified monitoring point.

[0032] The formula for calculating the disturbance value h at a specified monitoring point is:

[0033]

[0034]

[0035]

[0036] In the formula, L is the distance between pipes; ε i The strain measurement value of the inner high-temperature strain gauge; ε o The strain measurement value is for the outer high-temperature strain gauge; K is the neutral layer coefficient, which is determined by the inner bending diameter R. iThe plate thickness δ is obtained by querying; A is an intermediate variable for strain measurement.

[0037] As a preferred option for a boiler water-cooled wall deformation monitoring device based on strain measurement, it also includes:

[0038] The iterative analysis module is used to perform iterative analysis on the actual disturbance value h of a specified monitoring point.

[0039] The iterative analysis module utilizes the strain measurement value ε of the outer high-temperature strain gauge acquired by the measurement acquisition module. i and the strain measurement value ε of the inner high-temperature strain gauge o ;

[0040] The iterative analysis module includes:

[0041] The bending inner diameter calculation submodule is used to set the initial deflection value h0; and to calculate the bending inner diameter R using formula (3). i ;

[0042] The neutral layer coefficient query submodule is used to utilize the bending inner diameter R. i The neutral layer coefficient K is obtained by querying the plate thickness δ.

[0043] The iterative deflection value calculation submodule is used to obtain the iterative deflection value h1 using formulas (1) and (2);

[0044] The iterative accuracy analysis submodule is used to calculate the difference Δh between the iterative deflection value h1 and the initial deflection value h0;

[0045] The iteration end submodule is used to determine whether the difference Δh is less than the iteration end threshold Δ0. If the difference Δh is less than the iteration end threshold Δ0, the iteration deflection value h1 is used as the deflection value h of the specified monitoring point.

[0046] The beneficial effects of this invention are as follows: By utilizing the mechanism that bulging in a water-cooled wall leads to bending of the water-cooled wall plane, measurements are taken on the water-cooled wall plane to detect the degree of bending. Traditional techniques, due to the high-temperature characteristics of water-cooled walls, cannot achieve online measurement of bulging, cannot determine the severity of the fault before it evolves further, and cannot extract methods and measures. However, this invention can achieve online measurement. Traditional techniques, whether manual measurement or image recognition methods, cannot accurately obtain minute deformations of water-cooled walls. This invention obtains high-temperature strain values ​​with high measurement accuracy, can amplify minute deformations, and is more conducive to the early identification of deformations. Attached Figure Description

[0047] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0048] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0049] Figure 1 The iterative processing flowchart of the boiler water-cooled wall deformation monitoring method based on strain measurement provided in the embodiments of the present invention is shown below.

[0050] Figure 2 A schematic diagram of a boiler water-cooled wall deformation monitoring system based on strain measurement provided in an embodiment of the present invention;

[0051] Figure 3 This is a top view schematic diagram of the installation of high-temperature strain gauges in a boiler water-cooled wall deformation monitoring system based on strain measurement, provided in an embodiment of the present invention.

[0052] Figure 4 This is a side view of the installation of high-temperature strain gauges in a boiler water-cooled wall deformation monitoring system based on strain measurement, provided in an embodiment of the present invention.

[0053] Figure 5 A schematic diagram of high-temperature strain gauge welding for a boiler water-cooled wall deformation monitoring system based on strain measurement provided in an embodiment of the present invention;

[0054] Figure 6 A schematic diagram of the deformation of a strip plate in a boiler water-cooled wall deformation monitoring system based on strain measurement provided in an embodiment of the present invention;

[0055] Figure 7 This invention provides a strain-based boiler water-cooled wall deformation monitoring device. Detailed Implementation

[0056] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0057] In related technologies, a displacement sensor for detecting the deformation of membrane water-cooled walls is disclosed. The deformation of the pipe is measured by three displacement sensors. However, this method can only measure the positional changes of a single pipe before and after deformation, and this change cannot reflect the bending deformation of the entire water-cooled wall.

[0058] In related technologies, a defect detection system, method, equipment, and medium for boiler water-cooled walls are also disclosed. This system uses a drone to enter the boiler after shutdown to collect images of the water-cooled walls, which are then compared with previously acquired images to determine boiler defects, including water-cooled wall deformation. However, this image recognition-based device has a low success rate in identifying minute deformations of the water-cooled walls and can only perform monitoring after the boiler has been shut down.

[0059] In view of this, embodiments of the present invention provide a method, system, and device for monitoring boiler water-cooled wall deformation based on strain measurement. By utilizing strain measurement, the method enables online monitoring of the bulging deformation of the boiler water-cooled wall, allowing for the determination of the safety and reliability of the boiler water-cooled wall from the early stages of a fault. The specific details of the embodiments of the present invention are as follows.

[0060] Example 1

[0061] See Figure 1 Embodiment 1 of the present invention provides a method for monitoring boiler water-cooled wall deformation based on strain measurement, comprising the following steps:

[0062] Strain measurements of high-temperature strain gauges on the inside and outside of the strip plate are collected at preset time intervals.

[0063] Calculate the actual deflection value at the specified monitoring point using the strain measurements from two high-temperature strain gauges at the specified monitoring point;

[0064] The formula for calculating the disturbance value h at a specified monitoring point is:

[0065]

[0066]

[0067]

[0068] In the formula, L is the distance between pipes; ε iThe strain measurement value of the inner high-temperature strain gauge; ε o The strain measurement value is for the outer high-temperature strain gauge; K is the neutral layer coefficient, which is determined by the inner bending diameter R. i The plate thickness δ is obtained by querying; A is an intermediate variable for strain measurement.

[0069] In this embodiment, the strain measurement values ​​of the high-temperature strain gauges installed on the inner and outer sides of the strip plate are collected once every 1 minute. The lead wires of the high-temperature strain gauges are connected to the strain acquisition instrument. The strain acquisition instrument sends the strain measurement values ​​of the high-temperature strain gauges to the engineering station. The engineering station calculates the deflection value h according to the strain measurement values ​​of the high-temperature strain gauges using a formula. The average of the two high-temperature strain gauges at the same monitoring point is taken as the actual deflection value of that point. An alarm is triggered when the deflection exceeds a certain limit.

[0070] In actual calculations, the deflection h is required before the inner diameter of the bend R can be obtained. i The neutral layer coefficient K is used to calculate the deflection h, therefore an iterative method is used for calculation. The iterative process is as follows: Figure 1 As shown.

[0071] Specifically, an iterative analysis is performed on the actual disturbance value h at the specified monitoring point. The steps of the iterative analysis include:

[0072] Strain measurement value ε of the outer high-temperature strain gauge was collected. i and the strain measurement value ε of the inner high-temperature strain gauge o ;

[0073] Set the initial deflection value h0; calculate the inner diameter of the bend R using formula (3). i ;

[0074] Utilizing the inner diameter R of the bend i The neutral layer coefficient K is obtained by querying the plate thickness δ.

[0075] The iterative deflection value h1 is obtained using formulas (1) and (2);

[0076] Calculate the difference Δh between the iterative deflection value h1 and the initial deflection value h0;

[0077] Determine whether the difference Δh is less than the iteration end threshold Δ0. If the difference Δh is less than the iteration end threshold Δ0, use the iteration deflection value h1 as the deflection value h of the specified monitoring point.

[0078] Therefore, by utilizing the mechanism that bulging in the water-cooled wall leads to bending of the water-cooled wall plane, measurements can be taken on the water-cooled wall plane to detect the degree of bending. Traditional techniques, due to the high-temperature characteristics of water-cooled walls, cannot achieve online measurement of bulging, cannot determine the severity of the fault before it evolves further, and cannot extract methods and measures. However, this invention can achieve online measurement. Traditional techniques, whether manual measurement or image recognition methods, cannot accurately obtain the minute deformations of the water-cooled wall. This invention obtains high-temperature strain values ​​with high measurement accuracy, can amplify minute deformation amounts, and is more conducive to the early identification of deformation.

[0079] It should be noted that the method of this disclosure embodiment can be executed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method of this disclosure embodiment, and the multiple devices will interact with each other to complete the method described.

[0080] It should be noted that the above description describes some embodiments of this disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0081] Example 2

[0082] See Figure 2 , Figure 3 and Figure 4 Embodiment 2 of the present invention provides a boiler water-cooled wall deformation monitoring system based on strain measurement, which adopts the boiler water-cooled wall deformation monitoring method based on strain measurement in Embodiment 1 or any possible implementation thereof, including a water-cooled wall deformation measurement component. The water-cooled wall deformation measurement component includes a strip plate 2 connected to two water-cooled wall pipes 1 that deforms with the bulging of the water-cooled wall; high-temperature strain gauges 3 are welded to both the inner and outer sides of the center position of the strip plate 2.

[0083] The high-temperature strain gauge 3 is connected to a strain acquisition instrument 5 via a wire 4. The strain acquisition instrument 5 is used to acquire the measured values ​​of the high-temperature strain gauge 3. The strain acquisition instrument 5 is connected to an engineering station 6. The engineering station 6 is used to determine the degree of bulging deformation of the boiler water-cooled wall by using the magnitude of the measured values ​​of the high-temperature strain gauge 3.

[0084] In this embodiment, there is a gap between the two water-cooled wall pipes 1 connected by the strip plate 2, and there are 3 to 6 water-cooled wall pipes 1 between the two water-cooled wall pipes 1; the strip plate 2 is in a horizontal direction and is located 2.0m above the burner.

[0085] See Figure 5 In this embodiment, the high-temperature strain gauge 3 is welded to the center of the strip plate 2 by spot welding. The high-temperature strain gauge 3 has more than 20 weld points along its long side and more than 10 weld points along its short side.

[0086] Specifically, a water-cooled wall deformation measurement assembly is installed 2.0m above the burner on the outer wall of the water-cooled wall. This assembly consists of strip plates 2 welded to two water-cooled wall pipes 1 (spaced 3-6 times apart), which deform along with the water-cooled wall bulge. High-temperature strain gauges 3, capable of withstanding temperatures above 700 degrees Celsius, are welded to both the inner and outer sides of the center of each strip plate 2. By using these high-temperature strain gauges 3 to measure the water-cooled wall deformation, online measurement can be achieved.

[0087] Among them, the strip plate 2 is made of austenitic steel plate, and the two ends of the austenitic steel plate are welded to the outer surface of the water-cooled wall pipes 1 at intervals of 3-6. The high-temperature strain gauge 3 is welded to the center of the austenitic steel plate by spot welding, with more than 20 weld points in the long side direction and more than 10 weld points in the short side direction.

[0088] See Figure 6 In this embodiment, the measured value of the high-temperature strain gauge 3 is:

[0089] The difference between the measured value of the high-temperature strain gauge 3 on the inner side of the center position of the strip plate 2 and the measured value of the high-temperature strain gauge 3 on the outer side of the center position of the strip plate 2 is half. The strip plate 2 is modeled using finite element software to establish the correspondence between the strain measurement value of the strip plate 2 and the bulge deflection value of the water-cooled wall. The bulge deflection value of the water-cooled wall is obtained through this correspondence. The bulge deflection value of the water-cooled wall is monitored, and a bulge alarm is triggered when the bulge deflection value exceeds a preset limit.

[0090] Specifically, the measured values ​​of high-temperature strain gauge 3 are transmitted to strain acquisition instrument 5 via wire 4, and the data from strain acquisition instrument 5 is further sent to engineering station 6. After deformation occurs, half the difference between the measured values ​​of the inner and outer high-temperature strain gauges 3 is used as the measured value of the deformation of strip plate 2. The magnitude of the measured value is used on engineering station 6 to determine the degree of bulging deformation of the boiler water-cooled wall. Furthermore, finite element software is used to model the measuring strip plate 2, establishing the correspondence between strain measurement values ​​and bulging deformation values. Through strain measurement values ​​and the corresponding values, the bulging deflection, that is, the amount of bulging deformation, can be calculated relatively accurately. When the bulging deflection exceeds a certain limit, an alarm is triggered.

[0091] The analysis method integrated with finite element software is as follows:

[0092] The formula for calculating the disturbance value h at a specified monitoring point is:

[0093]

[0094]

[0095]

[0096] In the formula, L is the distance between pipes; ε i The strain measurement value of the inner high-temperature strain gauge 3; ε o The strain measurement values ​​are for the outer high-temperature strain gauge 3; K is the neutral layer coefficient, which is determined by the inner bending diameter R. i The plate thickness δ is obtained by querying; A is an intermediate variable for strain measurement.

[0097] In summary, this embodiment of the invention arranges a water-cooled wall deformation measurement component at a position 2.0m above the burner on the outer wall of the water-cooled wall. The component consists of strip plates 2 welded to two water-cooled wall pipes 1 (spaced 3-6 times apart), which deform along with the water-cooled wall bulge. High-temperature strain gauges 3, capable of withstanding temperatures above 700 degrees Celsius, are welded to both the inner and outer sides of the center of each strip plate 2. By using high-temperature strain gauges 3 capable of withstanding temperatures above 700 degrees Celsius to measure the water-cooled wall deformation, online measurement can be achieved. The measured values ​​of the high-temperature strain gauges 3 are transmitted to a strain gauge acquisition instrument 5 via a wire 4, and the data from the strain gauge acquisition instrument 5 is further sent to an engineering station 6. After deformation occurs, half the difference between the measured values ​​of the inner and outer high-temperature strain gauges 3 is used as the measured value of the strip plate 2 deformation. The degree of bulging deformation of the boiler water-cooled wall is determined at the engineering station 6 based on the magnitude of the measured value. Further, finite element method (FEM) software is used to model the measuring strip 2, establishing a correspondence between strain measurements and bulge deformation values. The bulge deflection, or bulge deformation, can be accurately calculated using the strain measurements and the corresponding values. An alarm is triggered when the bulge deflection exceeds a certain limit. This invention achieves high-temperature strain measurement accuracy, amplifies minute deformations, and is more conducive to early deformation identification.

[0098] Example 3

[0099] See Figure 3 Embodiment 3 of the present invention provides a boiler water-cooled wall deformation monitoring device based on strain measurement, comprising:

[0100] The measurement value acquisition module 7 is used to acquire the strain measurement values ​​of the high-temperature strain gauges on the inside and outside of the strip plate at preset time intervals.

[0101] The deflection value calculation module 8 is used to calculate the actual deflection value of a specified monitoring point using the strain measurement values ​​of two high-temperature strain gauges at the specified monitoring point.

[0102] The formula for calculating the disturbance value h at a specified monitoring point is:

[0103]

[0104]

[0105]

[0106] In the formula, L is the distance between pipes; ε i The strain measurement value of the inner high-temperature strain gauge; ε o The strain measurement value is for the outer high-temperature strain gauge; K is the neutral layer coefficient, which is determined by the inner bending diameter R. i The plate thickness δ is obtained by querying; A is an intermediate variable for strain measurement.

[0107] This embodiment also includes:

[0108] Iterative analysis module 9 is used to perform iterative analysis on the actual disturbance value h of a specified monitoring point;

[0109] The iterative analysis module 3 utilizes the strain measurement value ε of the outer high-temperature strain gauge acquired by the measurement acquisition module 7. i and the strain measurement value ε of the inner high-temperature strain gauge o ;

[0110] The iterative analysis module 9 includes:

[0111] The bending inner diameter calculation submodule 91 is used to set the initial deflection value h0; and to calculate the bending inner diameter R using formula (3). i ;

[0112] Neutral layer coefficient query submodule 92 is used to utilize the bending inner diameter R i The neutral layer coefficient K is obtained by querying the plate thickness δ.

[0113] The iterative deflection value calculation submodule 93 is used to obtain the iterative deflection value h1 using formula (1) and formula (2);

[0114] The iterative accuracy analysis submodule 94 is used to calculate the difference Δh between the iterative deflection value h1 and the initial deflection value h0;

[0115] The iteration end submodule 95 is used to determine whether the difference Δh is less than the iteration end threshold Δ0. If the difference Δh is less than the iteration end threshold Δ0, the iteration deflection value h1 is used as the deflection value h of the specified monitoring point.

[0116] It should be noted that the information interaction and execution process between the modules of the above-mentioned device are based on the same concept as the method embodiment in Embodiment 1 of this application, and the resulting technical effects are the same as those in the method embodiment of this application. For details, please refer to the description in the method embodiment shown above in this application, and it will not be repeated here.

[0117] Example 4

[0118] Embodiment 4 of the present invention provides a non-transitory computer-readable storage medium storing program code for a boiler water-cooled wall deformation monitoring method based on strain measurement. The program code includes instructions for executing the boiler water-cooled wall deformation monitoring method based on strain measurement of Embodiment 1 or any possible implementation thereof.

[0119] Computer-readable storage media can be any available medium that a computer can access, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives, SSDs).

[0120] Example 5

[0121] Embodiment 5 of the present invention provides an electronic device, including: a memory and a processor;

[0122] The processor and the memory communicate with each other via a bus; the memory stores program instructions that can be executed by the processor, and the processor can execute the strain measurement-based boiler water-cooled wall deformation monitoring method of Embodiment 1 or any possible implementation thereof by calling the program instructions.

[0123] Specifically, a processor can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, an integrated circuit, etc. When implemented in software, the processor can be a general-purpose processor that reads software code stored in memory. This memory can be integrated into the processor or located outside the processor and exist independently.

[0124] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0125] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0126] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A method for monitoring boiler water-cooled wall deformation based on strain measurement, characterized in that, include: Strain measurements of high-temperature strain gauges on the inside and outside of the strip plate are collected at preset time intervals. Calculate the actual deflection value at the specified monitoring point using the strain measurements from two high-temperature strain gauges at the specified monitoring point; The formula for calculating the disturbance value h at a specified monitoring point is: In the formula, L is the distance between pipes; ε i is the strain measurement value of the inner high-temperature strain gauge; ε o is the strain measurement value of the outer high-temperature strain gauge; K is the neutral layer coefficient, K is obtained by querying the bending inner diameter R i and the plate thickness δ; and A is an intermediate variable of the strain measurement value.

2. The method for monitoring boiler water-cooled wall deformation based on strain measurement according to claim 1, characterized in that, The actual disturbance value h at the specified monitoring point is subjected to iterative analysis. The steps of the iterative analysis include: Strain measurement value ε of the inner high-temperature strain gauge was collected. i and the strain measurement value ε of the outer high-temperature strain gauge o ; Set the initial deflection value h0; calculate the inner diameter of the bend R using formula (3). i ; Utilizing the inner diameter R of the bend i The neutral layer coefficient K is obtained by querying the plate thickness δ. The iterative deflection value h1 is obtained using formulas (1) and (2); Calculate the difference Δh between the iterative deflection value h1 and the initial deflection value h0; Determine whether the difference Δh is less than the iteration end threshold Δ0. If the difference Δh is less than the iteration end threshold Δ0, use the iteration deflection value h1 as the deflection value h of the specified monitoring point.

3. A boiler water-cooled wall deformation monitoring system based on strain measurement, employing the boiler water-cooled wall deformation monitoring method based on strain measurement as described in any one of claims 1 to 2, characterized in that, The device includes a water-cooled wall deformation measurement component, which comprises a strip plate connected to two water-cooled wall pipes that deforms with the bulging of the water-cooled wall; high-temperature strain gauges are welded to both the inner and outer sides of the center of the strip plate. The high-temperature strain gauge is connected to a strain acquisition instrument via wires. The strain acquisition instrument is used to acquire the measured values ​​of the high-temperature strain gauge. The strain acquisition instrument is connected to an engineering station, which is used to determine the degree of bulging deformation of the boiler water-cooled wall using the measured values ​​of the high-temperature strain gauge.

4. The boiler water-cooled wall deformation monitoring system based on strain measurement according to claim 3, characterized in that, There is a gap between the two water-cooled wall pipes connected by the strip plate, and there are 3 to 6 water-cooled wall pipes between the two water-cooled wall pipes. The strip plate is horizontal and is located 2.0m above the burner.

5. The boiler water-cooled wall deformation monitoring system based on strain measurement according to claim 4, characterized in that, The high-temperature strain gauge is welded to the center of the strip plate by spot welding. The high-temperature strain gauge has more than 20 weld points along its long side and more than 10 weld points along its short side.

6. The boiler water-cooled wall deformation monitoring system based on strain measurement according to claim 5, characterized in that, The measured values ​​of the high-temperature strain gauge are: Half of the difference between the high-temperature strain gauge readings on the inner side of the center position of the strip plate and the high-temperature strain gauge readings on the outer side of the center position of the strip plate.

7. The boiler water-cooled wall deformation monitoring system based on strain measurement according to claim 6, characterized in that, The strip plate is modeled using finite element software, and the correspondence between the strain measurement value of the strip plate and the bulge deflection value of the water-cooled wall is established. The bulge deflection value of the water-cooled wall is obtained through the correspondence between the strain measurement value and the bulge deflection value of the water-cooled wall.

8. The boiler water-cooled wall deformation monitoring system based on strain measurement according to claim 7, characterized in that, The bulge deflection value of the water-cooled wall is monitored, and a bulge alarm is triggered when the bulge deflection value exceeds the preset limit.

9. A boiler water-cooled wall deformation monitoring device based on strain measurement, characterized in that, include: The measurement value acquisition module is used to acquire the strain measurement values ​​of the high-temperature strain gauges on the inside and outside of the strip plate at preset time intervals. The deflection value calculation module is used to calculate the actual deflection value of a specified monitoring point using the strain measurement values ​​of two high-temperature strain gauges at the specified monitoring point. The formula for calculating the disturbance value h at a specified monitoring point is: In the formula, L is the distance between pipes; ε i The strain measurement value of the inner high-temperature strain gauge; ε o The strain measurement value is for the outer high-temperature strain gauge; K is the neutral layer coefficient, which is determined by the inner bending diameter R. i The plate thickness δ is obtained by querying; A is an intermediate variable for strain measurement.

10. The boiler water-cooled wall deformation monitoring device based on strain measurement according to claim 9, characterized in that, Also includes: The iterative analysis module is used to perform iterative analysis on the actual disturbance value h of a specified monitoring point. The iterative analysis module utilizes the strain measurement value ε of the inner high-temperature strain gauge acquired by the measurement acquisition module. i and the strain measurement value ε of the outer high-temperature strain gauge o ; The iterative analysis module includes: The bending inner diameter calculation submodule is used to set the initial deflection value h0; and to calculate the bending inner diameter R using formula (3). i ; The neutral layer coefficient query submodule is used to utilize the bending inner diameter R. i The neutral layer coefficient K is obtained by querying the plate thickness δ. The iterative deflection value calculation submodule is used to obtain the iterative deflection value h1 using formulas (1) and (2); The iterative accuracy analysis submodule is used to calculate the difference Δh between the iterative deflection value h1 and the initial deflection value h0; The iteration end submodule is used to determine whether the difference Δh is less than the iteration end threshold Δ0. If the difference Δh is less than the iteration end threshold Δ0, the iteration deflection value h1 is used as the deflection value h of the specified monitoring point.

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