Storage tank bottom deformation detection and evaluation method and system, electronic equipment and storage medium

Abstract

The invention discloses a storage tank bottom deformation detection and evaluation method and system, the method is suitable for a storage tank after tank cleaning, and the method comprises the following steps: A, setting the number and positions of measuring points according to the diameter and deformation profile of the storage tank bottom, the measuring points being tank bottom overall measuring points and / or deformation defect position measuring points; b, a sonar detection unit arranged in the filling liquid after tank cleaning is used for obtaining the overall contour of the tank bottom and a local deformation contour model; in the process, sound refraction signals of the tank wall are shielded through the manufactured sound shadow area; c, according to the local deformation contour model, the local concave depth or the protruding height of the storage tank bottom plate and the diameter of an inscribed circle of a local deformation area are obtained; d, according to the incidence relation between the local concave depth or the protrusion height and the diameter of the inscribed circle of the local deformation area, storage tank bottom deformation evaluation is conducted. By obtaining the tank bottom deformation contour and calculating the key deformation amount, the severity of tank bottom deformation can be effectively evaluated, and a basis is provided for safe and stable operation of the storage tank.

Description

Technical Field

[0001] The present invention relates to the technical field of petrochemical safety evaluation, and particularly relates to a method, system, electronic device and storage medium for detecting and evaluating the deformation of a storage tank bottom. Background Art

[0002] A large number of metal storage tanks for crude oil, refined oil and hazardous chemicals are used in the petroleum, petrochemical and warehousing industries for storing and producing oil products or chemical raw materials. Most of these media have characteristics such as flammability, explosiveness and corrosion. In addition to corrosion, the deformation of the storage tank bottom caused by the settlement of the storage tank foundation is also a serious problem. Due to reasons such as uneven soil distribution, different water contents in the geological soil of the construction site, and continuous changes in the liquid level load of the storage tank, the settlement of the storage tank foundation occurs from time to time, resulting in the deformation of the storage tank bottom and affecting the safe operation of the storage tank.

[0003] During the operation of oil storage, the settlement difference between the opposite points and adjacent points of the foundation and the uneven settlement amount are usually used as indicators to restrict the settlement of the storage tank. Whether it is a storage tank with the bottom plate edge anchored to the foundation or a non-anchored storage tank with the bottom plate freely placed on the foundation, the deformation of the tank bottom plate is not consistent with that of the foundation, and the deformation relationship between the two is relatively complex.

[0004] Chinese Patent CN208136975U discloses a settlement monitoring device for the foundation of an external floating roof storage tank and the storage tank foundation based on optical fiber sensing, which includes a fixing plate for fixing on the storage tank foundation. The fixing plate is provided with a liquid communication pipe for communicating with the storage tank, and a detection mechanism is arranged on the fixing plate. The corresponding pipe of the detection mechanism is communicated with the liquid communication pipe. The settlement monitoring devices for the foundation of the external floating roof storage tank are evenly arranged on the storage tank foundation. If the storage tank foundation deforms, the liquid levels in each monitoring device will change. By comparing the liquid levels of two symmetric monitoring devices, the relative value of the foundation settlement can be obtained. When this value exceeds the standard specified value, an alarm is given, thus achieving the purpose of real-time monitoring of the settlement of the foundation of the external floating roof storage tank and avoiding major accidents caused by excessive settlement of the storage tank foundation in the oil depot tank area. The inventive concept of the above similar technical solutions still evaluates the safety of the storage tank through the uneven settlement amount of the foundation settlement, and it is not scientific enough to measure the operation safety of the storage tank bottom plate by evaluating the foundation settlement.

[0005] Therefore, based on the problems in the above-mentioned prior art, there is an urgent need for a detection and evaluation method that can directly evaluate the deformation of the storage tank bottom plate to effectively ensure its safe operation.

[0006] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Invention

[0007] The object of the present invention is to provide a method and system for detecting and evaluating the deformation of the bottom of a storage tank. By obtaining the deformation profile of the bottom and calculating the key deformation amounts, the severity of the bottom deformation can be effectively evaluated, providing a basis for the safe and stable operation of the storage tank.

[0008] To achieve the above object, according to the first aspect of the present invention, a method for detecting and evaluating the deformation of the bottom of a storage tank is provided, which is applicable to the storage tank after tank cleaning, and includes the following steps: A. Set the number and positions of measuring points according to the bottom diameter and deformation profile of the storage tank, and the measuring points are overall measuring points on the bottom of the tank and / or measuring points at the deformation defects; B. Obtain the overall profile of the bottom of the tank and the local deformation profile model through a sonar detection unit arranged in the filled liquid after tank cleaning; during this process, shield the sound refraction signal of the tank wall through the manufactured sound shadow area; C. According to the local deformation profile model, obtain the local depression depth or protrusion height of the bottom plate of the storage tank and the inscribed circle diameter of the local deformation area; D. Evaluate the deformation of the bottom of the storage tank according to the correlation between the local depression depth or protrusion height and the inscribed circle diameter of the local deformation area.

[0009] Furthermore, in the above technical solution, the overall measuring points on the bottom of the tank in step A are located on the measuring lines evenly distributed in the diameter direction of the bottom of the tank, and the maximum spacing A of the measuring lines on the circumference is 10 m; the spacing B between the measuring points on each measuring line is not greater than 3 m.

[0010] Furthermore, in the above technical solution, the measuring points at the deformation defects in step A can be arranged in a cross-shaped or radial grid manner based on the outer contour of the deformation defects.

[0011] Furthermore, in the above technical solution, the sonar detection unit in step B may include: a transmitting array, which is arranged at the center position of the liquid level in the filled liquid and is used for transmitting acoustic wave signals of different frequencies; a receiving array, and the arrangement positions of its receiving transducers correspond to the overall measuring points on the bottom of the tank and the measuring points at the deformation defects, and are used for receiving acoustic wave signals.

[0012] Furthermore, in the above technical solution, the sound shadow area is located on the tank wall, and the sound refraction signal at the tank wall can be shielded by changing the temperature of the liquid at the tank wall to change the sound velocity distribution, so as to reduce the interference with the normal acoustic wave signal.

[0013] Furthermore, in the above technical solution, the obtaining of the overall profile of the bottom of the tank and the local deformation profile model in step B may be specifically: B1. Control the transmitting transducer of the transmitting array to emit acoustic waves of a certain frequency underwater, obtain the acoustic signals of each receiving transducer of the receiving array, and obtain the propagation velocity of the acoustic waves in the liquid medium in the storage tank; B2. Calculate the distance from the center of the liquid level to each measuring point on the bottom of the tank according to the propagation velocity, the time difference, azimuth, frequency and signal intensity of the received and transmitted signals, and obtain the deformation profile model of the bottom of the tank.

[0014] Furthermore, in the above technical solution, the correlation relationship in step D can be specifically: H ≤ 15.4D L ; where H is the local depression depth or protrusion height, in mm; D L is the inscribed circle diameter of the local deformation area, in m.

[0015] Furthermore, in the above technical solution, when H > 15.4D L the deformation evaluation result is unqualified; when H ≤ 15.4D L the deformation evaluation result is qualified and no repair is required.

[0016] According to the second aspect of the present invention, the present invention provides a storage tank bottom deformation detection and evaluation system, including: a measuring point setting module, which is used to set the number and positions of measuring points according to the diameter and deformation profile of the storage tank bottom, and the measuring points are the overall measuring points of the tank bottom and / or the measuring points at the deformation defects; a contour model acquisition module, which acquires the overall contour of the tank bottom and the local deformation contour model by means of a sonar detection unit arranged in the filled liquid after the tank is emptied; during this process, the acoustic refraction signal of the tank wall is shielded through the manufactured acoustic shadow area; a deformation data acquisition module, which is used to acquire the local depression depth or protrusion height of the storage tank bottom plate and the inscribed circle diameter of the local deformation area according to the local deformation contour model; a tank bottom deformation evaluation module, which is used to evaluate the deformation of the storage tank bottom according to the correlation relationship between the local depression depth or protrusion height and the inscribed circle diameter of the local deformation area.

[0017] Furthermore, in the above technical solution, the contour model acquisition module can further include: an acoustic shadow manufacturing sub-module, which is used to control and change the temperature of the liquid at the tank wall to change the sound speed distribution and shield the acoustic refraction signal at the tank wall.

[0018] Furthermore, in the above technical solution, the tank bottom deformation evaluation module can further include: a key deformation amount judgment sub-module, which is used to judge that: when H > 15.4D L the deformation evaluation result is unqualified; when H ≤ 15.4D L the deformation evaluation result is qualified and no repair is required; where H is the local depression depth or protrusion height, in mm; D L is the inscribed circle diameter of the local deformation area, in m.

[0019] According to the third aspect of the present invention, the present invention provides an electronic device for detecting and evaluating the deformation of a storage tank bottom, which includes: at least one processor; and a memory communicatively connected to at least one processor; wherein, the memory stores instructions executable by at least one processor, and the instructions are executed by at least one processor to enable at least one processor to execute the method for detecting and evaluating the deformation of a storage tank bottom according to any one of the above technical solutions.

[0020] According to the fourth aspect of the present invention, the present invention provides a non-transitory computer-readable storage medium storing computer-executable instructions for causing a computer to execute the method for detecting and evaluating the deformation of the bottom of a storage tank according to any one of the above technical solutions.

[0021] Compared with the prior art, the present invention has one or more of the following beneficial effects:

[0022] 1) The method and system of the present invention, through special measuring point arrangements and the application of a sonar detection unit inside the storage tank, can simulate the overall contour of the tank bottom and the local deformation contour model through the propagation of sound waves after the storage tank is emptied during operation. Furthermore, by introducing the principle of the sound shadow area and controlling the heating temperature of the tank wall to change the sound speed distribution inside the tank, a sound shadow area is obtained at the tank wall, shielding the interference signals generated by the tank wall and obtaining a more accurate overall contour of the tank bottom and the local deformation contour model;

[0023] 2) The method and system of the present invention, through the relational formula formed by experiments and fitting between the local depression depth or protrusion height (i.e., the deformation amount) and the inscribed circle diameter of the local deformation area, make the deformation safety assessment more convenient and fast, can effectively evaluate the severity of the tank bottom deformation, and provide a basis for the safe and stable operation of the storage tank.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and be able to implement it according to the content of the specification, and at the same time to make the above and other purposes, technical features, and advantages of the present invention more understandable, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic flow chart of the method for detecting and evaluating the deformation of the bottom of the storage tank of the present invention.

[0026] Figure 2 is a schematic layout diagram of the overall measuring points on the bottom of the tank of the present invention.

[0027] Figure 3 is a schematic layout diagram of the local deformation measuring points on the bottom of the tank of the present invention (where Figure 3-A is a schematic diagram of the cross-shaped layout method; Figure 3-B is a schematic diagram of the radial grid layout method).

[0028] Figure 4 is a schematic structural diagram of the specific deformation of the bottom plate of the storage tank of the present invention.

[0029] Figure 5 is a schematic module structure diagram of the system for detecting and evaluating the deformation of the bottom of the storage tank of the present invention.

[0030] Figure 6 It is a schematic structural diagram of the electronic device for detecting and evaluating the deformation of the bottom of the storage tank of the present invention. Specific embodiments

[0031] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0032] Unless otherwise clearly stated, in the whole specification and claims, the term "comprising" or its variations such as "including" or "having" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0033] In this article, for the convenience of description, spatial relative terms such as "below", "beneath", "under", "above", "over", "on" etc. can be used to describe the relationship between one element or feature and another element or feature in the accompanying drawings. It should be understood that the spatial relative terms are intended to include different directions of the object in use or operation in addition to the directions depicted in the figures. For example, if the object in the figure is flipped, the element described as "below" or "under" other elements or features will be oriented "above" the element or feature. Therefore, the exemplary term "below" can include both the below and above directions. The object can also have other orientations (rotated 90 degrees or other orientations) and the corresponding explanations should be made for the spatial relative terms used herein.

[0034] In this article, the terms "first", "second" etc. are used to distinguish two different elements or parts, and are not used to limit a specific position or relative relationship. In other words, in some embodiments, the terms "first", "second" etc. can also be interchanged with each other.

[0035] The following will describe the method, system, electronic device and storage medium of the present invention in more detail in the form of specific embodiments. It should be understood that the embodiments are only exemplary, and the present invention is not limited thereto.

[0036] Based on the problem that the evaluation of the operation safety of the bottom plate of the storage tank by evaluating the foundation settlement in the prior art (i.e., indirect evaluation) is not scientific enough, the present invention proposes a new inventive concept, that is, by obtaining the deformation profile and deformation amount of the bottom of the tank, directly evaluating the severity of the bottom deformation of the tank, and providing a more powerful basis for the safe and stable operation of the storage tank.

[0037] Example 1

[0038] As Figure 1 shown, this embodiment provides a method for detecting and evaluating the deformation of the bottom of the storage tank, which is applicable to the storage tank after emptying, and includes the following steps:

[0039] Step S101: Set the number and positions of measurement points according to the bottom diameter and deformation profile of the storage tank. The measurement points are the overall measurement points of the tank bottom and / or the measurement points at the deformation defects.

[0040] Specifically, the following point - layout rules are adopted for the measurement points in this step: Select no less than 4 evenly - distributed diameter measurement lines on the bottom of the storage tank 6. Figure 2 As shown in [5], there are 6 lines, namely the reference measurement line 0 and the first measurement line 1, the second measurement line 2, the third measurement line 3, the fourth measurement line 4, and the fifth measurement line 5. The maximum spacing A of the measurement lines on the circumference is 10 m; the measurement points 7 in the diameter direction of the tank bottom are evenly arranged, and the point - to - point spacing B is not greater than 3 m. If there is obvious deformation, additional measurement points need to be added, and the number of measurement points should cover the number of deformation points. Most of the bottom deformations of the tank are irregular ellipses or polygons. As shown in Figure 3, the obvious - deformation outer contour can be virtualized as an ellipse, and measurement points are set on the outer circle of the ellipse deformation outer contour 100, with the spacing in the arc - length direction being 20 - 100 mm. The internal measurement points can be laid out according to different types of grids. Ai and Bi are the measurement points of the grid - shaped (refer to Figure 3-A ) and radial grid (refer to Figure 3-B ). In the area with a large deformation curvature, the density of the measurement - point grid needs to be appropriately increased according to the on - site requirements, and the measurement points should cover the position with the largest deformation amount.

[0041] Step S102: Obtain the overall contour of the tank bottom and the local deformation contour model through a sonar detection unit arranged in the filled liquid after the tank is emptied. During this process, shield the sound - refraction signal of the tank wall through the manufactured sound - shadow area.

[0042] Specifically, for a storage tank in operation, it is hoped to obtain the overall contour of the tank bottom and the local deformation contour model through the sonar detection unit. Therefore, first, the tank needs to be emptied to remove the medium inside the tank; second, the receiving array of the sonar detection unit is placed from the manhole position at the top of the tank. The layout of the receiving array is as Figure 2As shown, each measurement point corresponds to a receiving transducer, and each measurement point is numbered. The sonar detection unit includes a transmitting array, a receiving array, a communication antenna, and a host computer, etc. The transmitting array is used for transmitting acoustic wave signals of different frequencies, the receiving array is used for receiving acoustic wave signals, the communication antenna is used for communication between the host computer and the transmitting array and the receiving array, and the host computer is used for controlling the transceiver signals, signal analysis, and drawing the bottom contour of the tank; Third, fill the storage tank with liquid, and the liquid level can be between 1 meter and the highest designed liquid level of the storage tank; Fourth, place the transmitting transducer into the tank from the manhole position at the top of the storage tank so that it floats at the center position of the liquid surface; Fifth, control the transmitting transducer by the host computer to emit acoustic waves of a certain frequency underwater, obtain the acoustic signals of the receiving transducer, and obtain the propagation speed of the acoustic waves of the transmitting transducer in the liquid medium in the storage tank; The host computer calculates the distance from the liquid surface center (i.e., the transmitting position) to each measurement point (i.e., the receiving position) on the tank bottom according to the propagation speed of the acoustic waves in the tank medium, the time difference, azimuth, frequency, and signal intensity of the received and transmitted signals, so as to obtain the overall contour of the tank bottom and the local deformation contour model.

[0043] Furthermore, the inventor has found through research that the storage tank is actually a container with a wall, so during the transmission and reception of acoustic signals, the reflection and refraction of the wall will have a greater impact on the effective reception of acoustic signals. During the propagation of acoustic waves, the curved acoustic ray that does not undergo any reflection is called a direct acoustic ray. For example, in a shallow sea, due to the existence of the sea surface, the propagation space of the direct acoustic ray is bounded, so there is a critical acoustic ray that is exactly tangent to the sea surface. For targets within the critical acoustic ray region, the sonar can always detect acoustic rays, while for targets outside this region, the acoustic rays can never be detected without reflection. This is like a blind spot for a person, and this region is called the acoustic shadow region. The signals in the acoustic shadow region will be significantly weakened or completely disappear. The present invention precisely utilizes the conceptual principle of the acoustic shadow region and hopes to shield the interference signals formed by the tank wall of the storage tank. The inventor has further found through research that the range of the acoustic shadow region is affected by the position of the sonar and the sound speed. If the position of the sonar is fixed, by changing the sound speed distribution, the desired position of the acoustic shadow region can be obtained, and the sound speed distribution is closely related to the change in the medium temperature. Therefore, the present invention creates the required position of the acoustic shadow region (i.e., at the tank wall) by changing the medium temperature at the tank wall, that is, by controlling the temperature at the tank wall so that the acoustic shadow region appears at the tank wall position. Specifically, based on the above principle, by changing the temperature of the liquid at the tank wall, an acoustic shadow region is created to shield the acoustic refraction signals of the tank wall. In this embodiment, the temperature of the liquid at the tank wall can be changed by wrapping the outer wall of the storage tank with a heating tape, internal heating coils, etc., so that it is within the range of the acoustic shadow region, thereby eliminating the signal interference caused by the tank wall. Through this step, a more accurate overall contour of the tank bottom and the local deformation contour model can be obtained.

[0044] Step S103: Based on the locally deformed contour model obtained in step S102, further obtain the local depression depth or protrusion height of the storage tank bottom plate and the inscribed circle diameter of the local deformation area. The inventor has found through research that since the deformation of the storage tank bottom generally has a shape similar to an ellipse, and the depression depth or protrusion height of the elliptical deformation shape is highly correlated with the inscribed circle diameter of the local deformation area. Through experimental research and data fitting, the inventor has found that the following formula (1) can effectively evaluate whether the deformation defect to be measured poses a threat to safety and requires immediate repair.

[0045] H ≤ 15.4D L ; Formula (1);

[0046] Wherein, H is the local depression depth or protrusion height (refer to Figure 4 ), in mm; D L is the inscribed circle diameter of the local deformation area, in m. It should be noted here that the units on the left and right sides of formula (1) are mm and m respectively, and no conversion is required during the judgment process.

[0047] Step S104: Evaluate the deformation of the storage tank bottom according to the correlation between the local depression depth or protrusion height and the inscribed circle diameter of the local deformation area obtained in step S103.

[0048] Specifically, when H > 15.4D L , the deformation evaluation result is unqualified and repair is required; when H ≤ 15.4D L , the deformation evaluation result is qualified and no repair is required.

[0049] This embodiment adopts the method of the above steps S101 to S104. Through special measuring point arrangement and the application of the sonar detection unit in the storage tank, it is possible to simulate the overall contour of the tank bottom and the locally deformed contour model through the propagation of sound waves for the operating storage tank after tank cleaning. Furthermore, by introducing the principle of the sound shadow area and controlling the heating temperature of the tank wall to change the sound speed distribution in the tank, a sound shadow area can be obtained at the tank wall, so that the interference signals generated by the tank wall are shielded, and a more accurate overall contour of the tank bottom and the locally deformed contour model can be obtained; the relational formula between the local depression depth or protrusion height (i.e., the deformation amount) and the inscribed circle diameter of the local deformation area formed through experiments and fitting makes the deformation safety evaluation more convenient and fast, can effectively evaluate the severity of the tank bottom deformation, and provides a basis for the safe and stable operation of the storage tank. In addition, when obtaining the overall contour of the tank bottom and the locally deformed contour model, the deformation conditions of the tank bottom under different internal pressures can be obtained by changing the liquid level (the liquid level can be between 1 m and the highest liquid level designed for the storage tank), realizing precise detection and evaluation of the tank bottom deformation.

[0050] Example 2

[0051] Combined with Figure 5 As shown, this embodiment provides a system for detecting and evaluating the deformation of the bottom of a storage tank. This system is a virtual modular system corresponding to Method Embodiment 1 and can achieve the same technical effects as Embodiment 1. The system includes: a measuring point setting module 201, a contour model acquisition module 202, a deformation data acquisition module 203, and a bottom deformation evaluation module 204. Among them, the measuring point setting module 201 is used to set the number and positions of measuring points according to the diameter and deformation contour of the bottom of the storage tank. The measuring points are the overall measuring points of the bottom of the tank and / or the measuring points at the deformation defects; the contour model acquisition module 202 obtains the overall contour of the bottom of the tank and the local deformation contour model by means of a sonar detection unit arranged in the liquid during tank cleaning; during this process, the acoustic refraction signal of the tank wall is shielded through the manufactured acoustic shadow area; the deformation data acquisition module 203 is used to obtain the local depression depth or bulge height of the bottom plate of the storage tank and the inscribed circle diameter of the local deformation area according to the local deformation contour model; the bottom deformation evaluation module 204 is used to evaluate the deformation of the bottom of the storage tank according to the correlation between the local depression depth or bulge height and the inscribed circle diameter of the local deformation area.

[0052] Further, preferably but not restrictively, the contour model acquisition module 202 may further include: an acoustic shadow manufacturing sub-module 2021, which is used to control and change the temperature of the liquid at the tank wall to change the sound speed distribution and shield the acoustic refraction signal at the tank wall.

[0053] Further, preferably but not restrictively, the bottom deformation evaluation module further includes: a key deformation amount judgment sub-module 2041, which is used to judge that: when H > 15.4D L the deformation evaluation result is unqualified; when H ≤ 15.4D L the deformation evaluation result is qualified and no repair is required; where H is the local depression depth or bulge height, in mm; D L is the inscribed circle diameter of the local deformation area, in m.

[0054] Example 3

[0055] This embodiment provides a non-transitory (non-volatile) computer storage medium, which stores computer-executable instructions. These computer-executable instructions can execute the tank bottom deformation detection and evaluation method in any of the above method embodiments and achieve the same technical effects. The method includes the following steps: A. Set the number and positions of measurement points according to the diameter and deformation profile of the tank bottom. The measurement points are the overall measurement points of the tank bottom and / or the measurement points at the deformation defects; B. Obtain the overall profile of the tank bottom and the local deformation profile model through a sonar detection unit arranged in the liquid during tank cleaning. During this process, shield the sound refraction signal of the tank wall through the manufactured sound shadow area; C. According to the local deformation profile model, obtain the local depression depth or protrusion height of the tank bottom plate and the inscribed circle diameter of the local deformation area; D. Evaluate the deformation of the tank bottom according to the correlation between the local depression depth or protrusion height and the inscribed circle diameter of the local deformation area.

[0056] Example 4

[0057] This embodiment provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer is made to execute the methods described in the above aspects and achieve the same technical effects. The method includes the following steps: A. Set the number and positions of measurement points according to the diameter and deformation profile of the tank bottom. The measurement points are the overall measurement points of the tank bottom and / or the measurement points at the deformation defects; B. Obtain the overall profile of the tank bottom and the local deformation profile model through a sonar detection unit arranged in the liquid during tank cleaning. During this process, shield the sound refraction signal of the tank wall through the manufactured sound shadow area; C. According to the local deformation profile model, obtain the local depression depth or protrusion height of the tank bottom plate and the inscribed circle diameter of the local deformation area; D. Evaluate the deformation of the tank bottom according to the correlation between the local depression depth or protrusion height and the inscribed circle diameter of the local deformation area.

[0058] Example 5

[0059] Figure 6 It is a schematic hardware structure diagram of the electronic device for detecting and evaluating the deformation of the tank bottom in this embodiment. The device includes one or more processors 610 and a memory 620. Taking one processor 610 as an example. The device may further include: an input device 630 and an output device 640.

[0060] The processor 610, the memory 620, the input device 630, and the output device 640 can be connected through a bus or other means.

[0061] The memory 620, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules. The processor 610 executes various functional applications and data processing of the electronic device by running the non-transitory software programs, instructions, and modules stored in the memory 620, that is, implements the processing method of the above method embodiment.

[0062] The memory 620 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data, etc. In addition, the memory 620 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 620 may optionally include a memory remotely set relative to the processor 610, and these remote memories can be connected to the processing device through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0063] The input device 630 can receive input digital or character information and generate a signal input. The output device 640 may include a display device such as a display screen.

[0064] The one or more modules are stored in the memory 620 and, when executed by the one or more processors 610, perform: A. Set the number and positions of measurement points according to the bottom diameter and deformation profile of the storage tank, and the measurement points are overall measurement points on the tank bottom and / or measurement points at deformation defects; B. Obtain the overall profile of the tank bottom and the local deformation profile model through a sonar detection unit arranged in the filled liquid after the tank is emptied; during this process, shield the acoustic refraction signal of the tank wall through the manufactured acoustic shadow area; C. According to the local deformation profile model, obtain the local depression depth or protrusion height of the storage tank bottom plate and the inscribed circle diameter of the local deformation area; D. Evaluate the deformation of the storage tank bottom according to the correlation between the local depression depth or protrusion height and the inscribed circle diameter of the local deformation area.

[0065] The above product can execute the method provided by the embodiment of the present invention and has corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in this embodiment, reference can be made to the methods provided in other embodiments of the present invention.

[0066] The device embodiments described above are merely illustrative. 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 distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0067] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0068] The foregoing description of the specific exemplary embodiments of the present invention is for the purpose of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made according to the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize various different exemplary embodiments of the present invention, as well as various different selections and changes. Any simple modification, equivalent change, and modification made to the above exemplary embodiments shall fall within the protection scope of the present invention.

Claims

1. A method for detecting and evaluating the deformation of a storage tank bottom, characterized in that, it is applicable to the storage tank after tank cleaning, and includes the following steps: A. Set the number and positions of measuring points according to the bottom diameter and deformation profile of the storage tank. The measuring points are the overall measuring points on the tank bottom and / or the measuring points at the deformation defects; B. Obtain the overall profile of the tank bottom and the local deformation profile model through a sonar detection unit arranged in the filled liquid after tank cleaning. During this process, shield the sound refraction signal of the tank wall through the manufactured sound shadow area; C. According to the local deformation profile model, obtain the local depression depth or protrusion height of the storage tank bottom plate and the inscribed circle diameter of the local deformation area; D. Evaluate the deformation of the storage tank bottom according to the correlation between the local depression depth or protrusion height and the inscribed circle diameter of the local deformation area.

2. The method for detecting and evaluating the deformation of a storage tank bottom according to claim 1, characterized in that, the overall measuring points on the tank bottom in step A are located on the measuring lines evenly distributed in the diameter direction of the tank bottom. The maximum spacing A of the measuring lines on the circumference is 10 m; the spacing B between the measuring points on each measuring line is not greater than 3 m.

3. The method for detecting and evaluating the deformation of a storage tank bottom according to claim 1, characterized in that, the measuring points at the deformation defects in step A are arranged in a cross-shaped or radial grid manner based on the outer contour of the deformation defects.

4. The method for detecting and evaluating the deformation of a storage tank bottom according to claim 1, characterized in that, the sonar detection unit in step B includes: a transmitting array, which is arranged at the center position of the liquid level in the filled liquid and is used for transmitting acoustic wave signals of different frequencies; a receiving array, the arrangement positions of its receiving transducers correspond to the overall measuring points on the tank bottom and the measuring points at the deformation defects, and are used for receiving the acoustic wave signals.

5. The method for detecting and evaluating the deformation of a storage tank bottom according to claim 4, characterized in that, the sound shadow area is located on the tank wall. By changing the temperature of the liquid at the tank wall, the sound velocity distribution is changed, so that the sound refraction signal at the tank wall is shielded to reduce the interference with the normal acoustic wave signal.

6. The method for detecting and evaluating the deformation of a storage tank bottom according to claim 4, characterized in that, the specific process of obtaining the overall profile of the tank bottom and the local deformation profile model in step B is as follows: B1. Control the transmitting transducer of the transmitting array to emit acoustic waves of a certain frequency underwater, obtain the acoustic signals of each receiving transducer of the receiving array, and obtain the propagation speed of the acoustic waves in the liquid medium in the storage tank; B2. According to the propagation speed, the time difference, azimuth, frequency and signal intensity of the received and transmitted signals, calculate the distance from the center of the liquid level to each measuring point on the tank bottom, and obtain the deformation profile model of the tank bottom.

7. The method for detecting and evaluating the deformation of a storage tank bottom according to claim 1, characterized in that, the correlation in step D is specifically: H ≤ 15.4D L ; Wherein, H is the local depression depth or protrusion height, in mm; D L is the inscribed circle diameter of the local deformation area, in m.

8. The method for detecting and evaluating the deformation of a storage tank bottom according to claim 7, characterized in that, When H > 15.4D L the deformation evaluation result is unqualified; when H ≤ 15.4D L the deformation evaluation result is qualified and no repair is required.

9. A system for detecting and evaluating the deformation of a storage tank bottom, characterized in that, it includes: A measuring point setting module, which is used to set the number and positions of measuring points according to the bottom diameter and deformation profile of the storage tank, and the measuring points are overall measuring points of the tank bottom and / or measuring points at deformation defects; A contour model acquisition module, which acquires the overall contour of the tank bottom and the local deformation contour model by means of a sonar detection unit arranged in the liquid filled after the tank is emptied; during this process, the acoustic refraction signal of the tank wall is shielded through the manufactured acoustic shadow area; A deformation data acquisition module, which is used to obtain the local depression depth or protrusion height of the storage tank bottom plate and the inscribed circle diameter of the local deformation area according to the local deformation contour model; A tank bottom deformation evaluation module, which is used to evaluate the deformation of the storage tank bottom according to the correlation between the local depression depth or protrusion height and the inscribed circle diameter of the local deformation area.

10. The storage tank bottom deformation detection and evaluation system according to claim 9, wherein, the contour model acquisition module further includes: An acoustic shadow manufacturing sub-module, which is used to control and change the temperature of the liquid at the tank wall to change the sound speed distribution and shield the acoustic refraction signal at the tank wall.

11. The storage tank bottom deformation detection and evaluation system according to claim 9, wherein, the tank bottom deformation evaluation module further includes: The key deformation amount judgment sub-module is used to judge that when H > 15.4D L the deformation evaluation result is unqualified; when H ≤ 15.4D L the deformation evaluation result is qualified and no repair is required; where H is the local depression depth or protrusion height, in mm; D L is the inscribed circle diameter of the local deformation area, in m.

12. An electronic device for detecting and evaluating the deformation of the storage tank bottom, wherein, it includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the storage tank bottom deformation detection and evaluation method according to any one of claims 1 to 8.

13. A non-transitory computer-readable storage medium, wherein, the non-transitory computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause the computer to execute the storage tank bottom deformation detection and evaluation method according to any one of claims 1 to 8.

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