A hazardous chemical storage tank risk monitoring method and device

Abstract

The application discloses a kind of dangerous chemical storage tank risk monitoring method and device, based on external monitoring unit, storage tank geometry data analysis module and storage tank structure deformation applicability evaluation module;The external monitoring unit includes: three-dimensional laser scanning unit, for scanning the surface of the measured storage tank and the scanning volume mark unit group, obtain the storage tank monitoring data of the surface of the measured storage tank and the volume monitoring data of the scanning volume mark unit in the scanning volume mark unit group;Data processing unit is used to generate the geometric deformation index data of the measured storage tank according to three-dimensional laser scanning unit measurement data;The storage tank geometry data analysis module is used to carry out three-dimensional space modeling to storage tank monitoring data file under unified coordinate system, and to storage tank structure deformation key index volume analysis calculation;The storage tank structure deformation applicability evaluation module is used to determine whether storage tank meets safety operation requirement according to tank body geometric deformation index data and safety threshold condition.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of dangerous chemical storage equipment, and particularly relates to a dangerous chemical storage tank risk monitoring method and device. BACKGROUND

[0002] Large dangerous chemical storage facilities are beneficial to reduce storage costs and improve storage efficiency, but the large equipment also brings corresponding risks. After the storage tank is put into use, due to changes in geological conditions, external environment, operation status, and influences of materials and construction quality, structural deformation modes such as foundation settlement, tank body tilting, and local deformation may occur. The structural deformation of the storage tank may cause the tank body to be lifted, the structure to be unstable, local connections to fail, and the bottom plate or tank wall to be deformed. These deformations not only damage the structural integrity of the storage tank, but also increase the risk of damage to the storage tank. Due to the particularity of the storage medium, once the storage tank leaks, it may cause serious accidents such as fire and explosion, and cause environmental pollution, personnel casualties, and other adverse consequences. Therefore, it is necessary to accurately and effectively monitor the structural deformation of the tank body, especially the large tank body, and to evaluate the applicability.

[0003] At present, the monitoring and evaluation of the structural deformation of large storage tanks at home and abroad are mainly based on the distributed point measurement of the foundation settlement of the storage tank. The structural deformation of the storage tank is determined by measuring the point data and performing related curve fitting to obtain the uneven settlement of the storage tank. However, the distributed point coordinate measurement fitting deformation has a certain approximation, and the corresponding evaluation standard is conservative, which is not conducive to fully mastering the safety status of the storage tank and efficiently utilizing the storage capacity of the storage tank. In addition, the deformation verification of large tank bodies is still in an offline state, that is, the storage tank needs to be emptied, thoroughly cleaned, and anticorrosion treated before being verified. The large tank body is verified in the empty tank state after water pressure settlement. However, in actual use, due to the frequent use of the storage tank, continuous production operation, oil turnover, and other objective factors, the oil depot often cannot implement the tank cleaning inspection on schedule, especially for crude oil storage tanks, the tank cleaning period is as long as six, seven, or even ten years or more. At the same time, large storage tank cleaning and maintenance also requires a large amount of manpower and material resources, is time-consuming and costly. Therefore, the current method cannot effectively guarantee the monitoring efficiency and accuracy, and cannot meet the actual production needs. SUMMARY

[0004] The present application aims at the deficiencies in the prior art, and provides a dangerous chemical storage tank risk monitoring device, which comprises an external monitoring unit, a storage tank geometric structure data analysis module and a storage tank structure deformation applicability evaluation module, the external monitoring unit comprises a track frame, a moving module and a monitoring module, the track frame is arranged on the upper part of a tank body, the track frame is annular and arranged on the top of the outer circumferential surface of the tank body, a supporting ring is arranged in the track frame, the supporting ring is fixedly connected to the upper part of the tank body, the supporting ring and the track frame are fixedly connected through a rib plate, the moving module comprises a guide frame, guide wheels and stabilizing rollers, the guide frame is shaped like a Chinese character 'fang', guide wheels are respectively sleeved on the upper and lower ends of the guide frame, the two guide wheels are respectively clamped on the top surface and the bottom surface of the track frame, periodic scanning volume markers are arranged on the outer wall of the storage tank, scanning volume marker units are formed between the scanning volume markers, a laser transceiver and a temperature measuring sensor are arranged on the front part of the monitoring platform, the laser transceiver is provided with upper and lower scanning surfaces, and the state of the top outer wall of the tank body and the side outer wall of the tank body is monitored, a transmitter is further arranged, and the measured data is transmitted back.

[0005] A three-dimensional laser scanning unit is arranged for scanning the surface of the storage tank to be measured and the scanning volume marker unit group, so as to obtain storage tank monitoring data of the surface of the storage tank to be measured and volume monitoring data of the scanning volume marker units in the scanning volume marker unit group.

[0006] A data processing unit is arranged for generating geometric deformation index data of the storage tank to be measured according to the measurement data of the three-dimensional laser scanning unit.

[0007] The storage tank geometric structure data analysis module is used for three-dimensional space modeling of the storage tank monitoring data file in a unified coordinate system and analysis and calculation of key index quantities of storage tank structure deformation, and the storage tank structure deformation applicability evaluation module is used for judging whether the storage tank meets the safety operation requirement according to the tank body geometric deformation index data and a safety threshold condition.

[0008] Preferably, a longitudinally extending support is arranged at the rear part of the guide frame, a spherical stabilizing roller is arranged on the side wall of the longitudinally extending support, and the stabilizing roller is in contact with the track frame, so as to stabilize the running direction of the moving module.

[0009] Preferably, the monitoring module comprises a monitoring platform, a torsion support is arranged on the monitoring platform, and the monitoring platform is rotatably arranged on the torsion support.

[0010] Preferably, the laser transceiver is obliquely arranged with upper and lower scanning surfaces, which respectively monitor the scanning and marking states of the top outer wall of the tank body and the side outer wall of the tank body, and the temperature sensor is arranged on both sides of the monitoring platform to monitor and record the air temperature near the monitoring platform.

[0011] Preferably, the three-dimensional laser scanning unit includes at least four groups of scanning and marking unit groups, and the scanning and marking unit is arranged on the surface of the tank to be monitored.

[0012] Preferably, the data storage subunit is used to store the tank monitoring data measured by the three-dimensional laser scanning unit and the volume monitoring data of the scanning and marking unit group.

[0013] The denoising and splicing subunit is used to remove the noise points in the tank monitoring data, splice the tank monitoring data after removing the noise points according to the volume monitoring data of the scanning and marking unit in the characteristic scanning and marking unit group, and obtain the monitoring data file of the whole tank to be measured.

[0014] The coordinate conversion subunit is used to convert the coordinates of the three-dimensional laser scanner and the tank monitoring data file, and obtain the monitoring data file in the unified coordinate system.

[0015] The characteristic scanning and marking unit group is any two three-dimensional laser scanners that can scan the same scanning and marking unit group in the intersection of the scanning regions.

[0016] Preferably, the tank geometry data analysis module includes: a three-dimensional modeling unit for establishing a three-dimensional model of the tank to be measured according to the monitoring data file in the reference point coordinate system; and a key index calculation unit for calculating key geometric deformation index data of the tank body according to the three-dimensional model of the tank to be measured in the unified coordinate system. The geometric deformation index includes tank wall height, local concave-convex deformation value of the tank wall, ellipticity, tank wall inclination and overall settlement.

[0017] Preferably, the tank structure deformation applicability evaluation module includes: a tank structure deformation evaluation unit for evaluating the deformation of the tank foundation, the perpendicularity and cylindricity of the tank wall, the concave-convex degree, the deformation of the oil measuring pipe and the guide pipe, and the fixed top support column.

[0018] The tank strength evaluation unit is used to evaluate the tank based on the structural stress analysis.

[0019] Step S11 specifically includes: the control network should control the scanning region as a whole, and when scanning is performed in different regions, the monitoring data of each region should be registered to play a role in connecting and controlling error transmission.

[0020] The step S12 specifically comprises: uniformly arranging monitoring platforms around the storage tank, the monitoring platforms scanning the entire tank foundation and tank wall, and the number of stations being reduced as much as possible, and the overlapping degree of effective monitoring between the monitoring platforms being not less than 30%;

[0021] The step S13 specifically comprises: arranging scanning markers on the tank wall or ground of the storage tank according to the field measurement requirements, the scanning markers being uniformly arranged and staggered in height in the scanning range, the number of scanning markers at each monitoring platform point being not less than 4, and the number of common scanning markers of adjacent two monitoring platforms being not less than 3;

[0022] The step S14 specifically comprises: scanning at each monitoring platform point by using a three-dimensional laser scanner, and storing the scanned monitoring data file; the monitoring platform coordinate observation should meet the control network observation accuracy requirements;

[0023] The step S15 specifically comprises: after the data acquisition is completed, the scanning data should be imported into a computer, the completeness and availability of the monitoring data coverage range and the scanning marker data are checked, and the missing and abnormal data should be scanned in time. The step S21 specifically comprises: using the control points and scanning markers to register the monitoring data; when using the scanning markers to register the monitoring data, not less than 3 homonymous points should be used to establish a conversion matrix for monitoring registration;

[0024] The step S22 specifically comprises: using not less than 3 homonymous points distributed uniformly to convert the coordinate system through a seven-parameter model; filtering or human-computer interaction noise reduction processing is performed on the abnormal points and isolated points in the monitoring data that are separated from the target object of the storage tank; the monitoring data file obtained at each scanning and mapping point is processed to obtain a monitoring data file of the entire tank body; and a three-dimensional space model is established for the storage tank monitoring data file in the unified coordinate system;

[0025] The step S23 specifically comprises: extracting monitoring based on the full-size three-dimensional model of the storage tank in the unified coordinate system, and establishing a monitoring grid; calculating the deformation key index data of the tank body three-dimensional space model based on the extracted monitoring and the established triangular grid, calculating the tank wall height, fitting the center of the cross section of the wall plate at different heights of the storage tank and processing the cross section to calculate the inner radius of the wall, the local concave-convex deformation value, the ellipticity, and using data interpolation to calculate the inclination and settlement of the wall.

[0026] Preferably, the step S31 specifically comprises: using the obtained structural deformation key index quantity to evaluate the deformation of the storage tank foundation, the verticality and cylindricality deformation of the tank wall, the concave-convex deformation, and the deformation of the fixed top support column based on the storage tank safety evaluation criteria;

[0027] The step S32 is specifically: calculating stress distribution of the storage tank under the load state, when the calculated maximum stress value is less than the allowable stress of the storage tank material, that is, within the allowable range, the storage tank meets the requirement of safe operation, and can continue to operate.

[0028] Compared with the prior art, the beneficial effects of the present application are that: by setting the monitoring scanning surface, the inaccuracy of single point monitoring is avoided; the cycle monitoring period can be set according to the size of the storage tank, the external environment state and the importance of the facility, and the sampling efficiency is improved; compared with the comprehensive fiber monitoring mode, the scanning volume mark and the inductive device are selectively set according to the individual characteristics of the storage tank, and the monitoring cost is lower; a dynamic model is established, and the key parameters are monitored and predicted. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be described below. Obviously, the technical solutions described in the description in combination with the drawings are only some embodiments of the present application, and for those skilled in the art, other embodiments and drawings can be obtained without creative labor on the basis of the embodiments shown in the drawings.

[0030] Figure 1 is a three-dimensional structure schematic diagram of a dangerous chemical storage tank risk monitoring device.

[0031] Figure 2 is a front view direction structure schematic diagram of a dangerous chemical storage tank risk monitoring device.

[0032] Figure 3 is a top view direction structure schematic diagram of a dangerous chemical storage tank risk monitoring device.

[0033] Figure 4 is a simplified structure schematic diagram of a dangerous chemical storage tank risk monitoring device.

[0034] Figure 5 is a monitoring module cross-section schematic diagram of a dangerous chemical storage tank risk monitoring device.

[0035] In the figure: 1-Track frame, 11-Support ring, 12-Rib plate, 2-Monitoring platform, 21-Twist support, 22-Monitoring platform, 23-Guide frame, 24-Guide wheel, 25-Stable roller, 3-Laser transceiver, 31-Transmitter, 4-Tank body, 41-Sensor, 42-Scanning volume mark. DETAILED DESCRIPTION

[0036] The technical solutions of various embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments described in 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.

[0037] Embodiments of the present invention provide a risk monitoring device for hazardous chemical storage tanks, as shown in Figures 1 to 12. Figure 5 As shown, the external monitoring unit includes a track frame, a moving module, and a monitoring module. The track frame is located on the upper part of the storage tank body and is arranged in a ring around the top of the outer circumference of the tank body 4. A support ring 11 is provided inside the track frame and is fixedly connected to the upper part of the tank body 4. The support ring 11 and the track frame 1 are fixedly connected by a rib plate 12. The moving module includes a guide frame 23, guide wheels 24, and stabilizing rollers 25. The guide frame 23 is U-shaped, and guide wheels 24 are respectively sleeved at the upper and lower ends of the guide frame 23. The two guide wheels 24 are respectively engaged with the top and bottom surfaces of the track frame 1. The guide wheels 24 are driven by a DC motor. A longitudinal extension support is provided at the rear of the guide frame 23. A spherical stabilizing roller 25 is provided on the side wall of the longitudinal extension support. The stabilizing roller 25 contacts the track frame 1 to stabilize the running direction of the moving module. The monitoring module includes a monitoring platform 2, on which a torsion bracket 21 is mounted, with the monitoring platform rotatably mounted on the torsion bracket. A laser transceiver 3 and a temperature sensor are located at the front of the monitoring platform 2. The laser transceiver 3 has upper and lower scanning surfaces to monitor the status of the top outer wall and the side outer walls of the tank 4, respectively. A transmitter 31 is also provided to transmit the measured data back to the user.

[0038] The temperature sensors are installed on both sides of the monitoring platform to avoid light, and are used to monitor and record the air temperature near the monitoring platform.

[0039] A monitoring method was developed based on the risk monitoring device for hazardous chemical storage tanks, comprising an external monitoring unit, a storage tank geometry data analysis module, and a storage tank structure deformation suitability evaluation module.

[0040] It also includes a monitoring module, including scanning scale 42 and the tank to be tested 4.

[0041] The scanning markers 42 are evenly distributed around the outer side of the tank body 4. In order to improve the measurement accuracy and efficiency, preferably, 12 groups of scanning markers 42 can be arranged around the tank body 4, and each scanning marker 42 is arranged on the basis of a 30-degree arc line around the outer wall of the cylindrical surface of the outer side of the tank body 4, and a plurality of scanning marker unit groups corresponding to the scanning markers 42 are arranged.

[0042] Each scanning marker unit group is provided with at least three scanning marker unit points, preferably three.

[0043] The distance between the scanning marker unit points of each scanning marker unit group can be set according to the height of the tank body 4, and the distance between the scanning marker unit points of each scanning marker unit group is at least 0.5 m. Preferably, it is set to 0.2H m, wherein H is the absolute height of the tank body 4.

[0044] The data processing unit is used for storing data from the three-dimensional laser scanning unit, and performing denoising splicing and coordinate conversion. In the present application, the data processing device can be a PC, a server or a workstation.

[0045] The tank geometry data analysis module is used to model the tank monitoring data file in the unified coordinate system in three-dimensional space, and analyze and calculate the key index quantity of the tank structure deformation.

[0046] Specifically, it includes a three-dimensional modeling unit and a key index calculation unit.

[0047] The three-dimensional modeling unit is used to establish a three-dimensional model of the tank to be measured according to the monitoring data file in the reference point coordinate system; the key index calculation unit is used to calculate the key geometric deformation index data of the tank body 4 according to the three-dimensional model of the tank to be measured in the unified coordinate system. The index calculation subunit is specifically used to calculate the key geometric deformation index of the three-dimensional model of the tank established by the three-dimensional modeling subunit. The key geometric deformation index includes the tank wall height, the local concave-convex deformation value of the tank wall, the ellipticity, the tank wall inclination and the overall settlement.

[0048] In the present application, the tank geometry data analysis module can be a PC, a server or a workstation.

[0049] The tank structure deformation applicability evaluation module is used to carry out deformation-based evaluation of the tank based on the obtained structure deformation key index quantity and tank safety evaluation criteria; further, stress distribution of the tank under load bearing state is calculated to carry out deformation-based stress evaluation of the tank structure. Specifically, the tank structure deformation evaluation unit and the tank strength evaluation unit. The tank structure deformation evaluation unit is used to evaluate the deformation of the tank foundation, the verticality and cylindricity of the tank wall, the concave-convex degree, the deformation of the oil measuring pipe and guide pipe, and the fixed top support column; the tank strength evaluation unit is used to carry out evaluation based on structure stress analysis of the tank.

[0050] The specific steps of the tank body 4 deformation monitoring method of another embodiment of the application include:

[0051] S1, tank structure deformation monitoring, specifically including:

[0052] S11, control network layout and observation; the scanning area is comprehensively controlled, and when scanning operation is carried out in subareas, the monitoring data of each area should be matched to play a role in connecting and controlling error transmission.

[0053] S12, monitor layout; a patrol monitor or a plurality of fixed scanning monitors are arranged outside the tank, the fixed scanning monitors should cover the entire tank body 4, and the number of stations should be reduced as much as possible, and the overlapping degree of the effective scanning volume unit of the monitoring platform should be not less than 30%; the patrol monitor patrols around the tank body 4 according to the track, and the patrol cycle is not less than 2r / h.

[0054] S13, scanning volume unit layout; according to the field measurement requirement, scanning volume units are arranged on the outer wall of the tank body 4 and the top, and the scanning volume units are uniformly arranged in the scanning range.

[0055] S14, monitoring data acquisition; the monitoring platform drives the laser transceiver to scan at each monitoring platform point, and stores the scanned monitoring data file; the monitoring platform coordinate observation should meet the control network observation accuracy requirement, and the laser transceiver 3 scans the periphery.

[0056] S15, data checking; after data acquisition is completed, the scanning data should be imported into the computer, the monitoring data coverage integrity, the scanning volume unit data integrity and availability are checked, and the missing and abnormal data should be timely rescaned.

[0057] S2, tank geometric structure data analysis, specifically including:

[0058] S21, monitoring data matching; the monitoring data is matched by using the detection unit and the scanning volume unit; when the scanning volume unit is used for monitoring data matching, not less than 4 groups of homonymous points are used to establish a conversion matrix for monitoring matching.

[0059] S22, coordinate system conversion and modeling; coordinate system conversion adopts no less than 4 groups of uniformly distributed homonymous points to form a rectangular array, and the coordinate system conversion is performed through a parameter model; the abnormal points and isolated points of the target object deviating from the storage tank in the monitoring data are subjected to filtering or man-machine interaction noise reduction processing. The monitoring data files obtained for each scanning point are subjected to data processing to obtain a monitoring data file of the tank body 4 as a whole; and a three-dimensional space model is established for the storage tank monitoring data file in the unified coordinate system.

[0060] S23, analysis and calculation of key index quantities of storage tank structure deformation; based on the full-size three-dimensional model of the storage tank after the unified coordinate system, monitoring is extracted, and a monitoring grid is established; based on the extracted monitoring and the established triangular grid, the three-dimensional space model of the tank body 4 is subjected to key index data calculation of deformation, the tank wall height is calculated, the cross-section center fitting and the cross-section processing are performed on the wall plates of different heights of the storage tank to calculate the tank wall inner radius, the local concave-convex deformation value, the ellipticity, and the tank wall inclination and the settlement are calculated by using data interpolation.

[0061] S3, evaluation of the adaptability of the storage tank structure deformation, specifically including:

[0062] S31, evaluation based on deformation; based on the obtained key index quantities of structure deformation, the foundation deformation, the verticality and cylindricity deformation of the tank wall, the concave-convex deformation, the deformation of the oil measuring pipe and the guide pipe of the storage tank are evaluated according to the safety evaluation criteria of the storage tank. The safety evaluation criteria include the allowable value of the radial settlement difference of the foundation of the storage tank, the allowable deviation of the verticality and cylindricity deformation of the tank wall, the allowable value of the local concave-convex deformation of the storage tank, the limit value of the overall uniform settlement of the tank wall, the limit value of the overall uniform inclination of the tank wall, the allowable value of the height deformation of the tank wall, the elevation of the foundation top, the verticality of the tank wall, the cylindricity of the tank wall, the local concave-convex deformation, the allowable deviation of the straightness and verticality of the oil measuring pipe and the guide pipe, and the allowable deviation of the verticality of the fixed top.

[0063] S32, evaluation based on stress; the stress distribution of the storage tank under the bearing load state is calculated, when the calculated maximum stress value is less than the allowable stress of the storage tank material, i.e. within the allowable range, the storage tank meets the requirements of safe operation and can continue to operate. When the calculated stress value exceeds the allowable stress, the storage tank has a high risk of hidden danger and should be immediately stopped and appropriate measures should be taken to remedy.

[0064] Application scenario, for the geometric deformation monitoring of large port crude oil storage tanks, the intensive model of the storage tank is a thin-walled cylinder, according to the characteristics of the storage tank, it is an axisymmetric form of a revolving body, the diameter is 100 m, and the tank wall height is 20 m.

[0065] When the monitoring system is running, a ring track frame is arranged on the top layer of the outer wall of the storage tank, the inner wall of the track frame is 0.5 m away from the outer wall of the storage tank, and the monitoring platform is patrolled on the track frame through the guide wheels.

[0066] A set of scanning markers are pasted on the wall opposite to each surveying point, and each scanning marker is set to be equidistantly distributed, the distance between the upper and lower scanning markers is 2m, the distance between the left and right scanning markers is 30 degrees, the top scanning markers are annularly set, the top annular markers gradually shrink with the shape of the top of the storage tank, a sensor 41 is arranged at the center of the top, and the sensor 41 is a laser sensor.

[0067] The storage tank geometry data analysis module and the storage tank structure deformation applicability evaluation module are installed on corresponding data processing workstations, and the workstations can be arranged outside the working area.

[0068] After the system is set, the above system can be used to monitor the deformation of the crude oil storage tank online and evaluate the applicability, the monitoring data are processed by the data processing device during the monitoring, so that the key geometric deformation indexes of the crude oil storage tank can be monitored online, the safety condition can be evaluated by using the storage tank safety evaluation criterion, the stress distribution of the storage tank under the load state can be calculated based on the key geometric deformation indexes of the storage tank, so that the structure applicability and safety of the storage tank can be judged. The stress calculation result of the storage tank is calculated based on the key geometric deformation indexes obtained by the three-dimensional laser scanning monitoring.

[0069] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application should be defined by the appended claims rather than the foregoing description, and it is intended to embrace all changes and modifications that fall within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to which the reference signs belong.

[0070] In addition, it should be understood that although the present specification is described in terms of embodiments, each embodiment does not contain only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be combined to form other embodiments that those skilled in the art can understand.

Claims

1. A hazardous chemical storage tank risk monitoring device, characterized by: The external monitoring unit comprises a track frame, a moving module and a monitoring module. The track frame is arranged on the upper part of the tank body. The track frame is annular and arranged on the top of the outer circumferential surface of the tank body. A support ring is arranged in the track frame. The support ring is fixedly connected to the upper part of the tank body. The support ring and the track frame are fixedly connected through a rib plate. The moving module comprises a guide frame, guide wheels and stable rollers. The guide frame is shaped like a Chinese character 'fang'. The upper and lower ends of the guide frame are respectively sleeved with guide wheels. The two guide wheels are respectively clamped on the top surface and the bottom surface of the track frame. Periodically arranged scanning volume markers are arranged on the outer wall of the tank. The scanning volume markers form a scanning volume marker unit group. The monitoring module is provided with a laser transceiver and a temperature measuring sensor. The laser transceiver is provided with upper and lower scanning surfaces for monitoring the state of the top outer wall of the tank body and the side outer wall of the tank body. A transmitter is further arranged. The transmitter transmits the measured data back. A three-dimensional laser scanning unit is arranged for scanning the surface of the tank to be measured and the scanning volume marker unit group to obtain tank monitoring data of the surface of the tank to be measured and volume monitoring data of the scanning volume marker unit in the scanning volume marker unit group. A data processing unit is arranged for generating geometric deformation index data of the tank to be measured according to the measurement data of the three-dimensional laser scanning unit. The tank geometry data analysis module is arranged for three-dimensional space modeling of the tank monitoring data file in a unified coordinate system and analysis and calculation of key index volume of tank structure deformation. The tank structure deformation suitability evaluation module is arranged for judging whether the tank meets the safety operation requirement according to the tank geometric deformation index data and the safety threshold condition. The guide frame is provided with a longitudinally extending support. The side wall of the longitudinally extending support is provided with a spherical stable roller. The stable roller is in contact with the track frame to stabilize the running direction of the moving module. The monitoring module comprises a monitoring platform. The monitoring platform is provided with a torsion support. The torsion support is rotatably provided with a detection platform. The laser transceiver is provided with upper and lower scanning surfaces. The upper and lower scanning surfaces are arranged to monitor the state of the scanning volume markers on the top outer wall of the tank body and the side outer wall of the tank body. The temperature measuring sensor is arranged on the two sides of the monitoring platform to avoid light and monitor and record the air temperature near the monitoring platform.

2. The hazardous chemical storage tank risk monitoring device according to claim 1, characterized in that: The three-dimensional laser scanning unit comprises at least four groups of scanning volume marker unit groups. The scanning volume marker units are arranged on the surface of the tank to be monitored. 3.The dangerous chemical storage tank risk monitoring device according to claim 2, characterized in that: A data storage subunit is arranged for storing the tank monitoring data and the volume monitoring data of the scanning volume marker unit group measured by the three-dimensional laser scanning unit. A denoising and splicing subunit is arranged for removing noise points in the tank monitoring data, splicing the tank monitoring data with the removed noise points according to the volume monitoring data of the scanning volume marker units in the characteristic scanning volume marker unit group, and obtaining the monitoring data file of the whole tank to be measured. The coordinate conversion subunit is used for coordinate conversion between the three-dimensional laser scanner coordinate and the storage tank monitoring data file, so as to obtain the monitoring data file in the unified coordinate system. The feature scanning volume unit group is the same scanning volume unit group that can be scanned by any two three-dimensional laser scanners intersecting the scanning area.

4. The hazardous chemical storage tank risk monitoring device according to claim 3, characterized in that: The storage tank geometry data analysis module comprises a three-dimensional modeling unit, which is used for establishing a three-dimensional model of the storage tank to be measured according to the monitoring data file in the reference point coordinate system; and a key index calculation unit, which is used for calculating key geometric deformation index data of the tank body according to the three-dimensional model of the storage tank to be measured in the unified coordinate system; and the geometric deformation index comprises tank wall height, local concave-convex deformation value of the tank wall, ellipticity, tank wall inclination and overall settlement.

5. The monitoring method of the hazardous chemical substance storage tank risk monitoring device according to claim 4, characterized in that: The storage tank structure deformation suitability evaluation module comprises a storage tank structure deformation evaluation unit, which is used for evaluating the deformation of the storage tank foundation, the perpendicularity and the cylindricality of the tank wall, the concave-convex degree, the deformation of the oil measuring pipe and the guide pipe and the fixed top support column; The storage tank strength evaluation unit is used for carrying out evaluation based on structure stress analysis of the storage tank; The step S11 is specifically: the control network should control the scanning area as a whole, and when the scanning operation is carried out in the subareas, the monitoring data of the subareas should be matched to play the role of connection and control of error transmission; The step S12 is specifically: the monitoring platforms are uniformly arranged around the storage tank, the scanning of the monitoring platforms should cover the entire storage tank foundation and tank wall, and the number of stations should be reduced as much as possible, and the effective monitoring overlap degree between the monitoring platforms should be not less than 30%; The step S13 is specifically: according to the field measurement requirements, the scanning volume units are arranged on the tank wall or the ground, the scanning volume units are uniformly arranged in the scanning range and are staggered in height, the number of scanning volume units at each monitoring platform point should be not less than 4, and the number of common scanning volume units of adjacent two monitoring platforms should be not less than 3; The step S14 is specifically: the three-dimensional laser scanner is used to scan at each monitoring platform point, and the scanned monitoring data file is stored; and the monitoring platform coordinate observation should meet the observation accuracy requirements of the control network; The step S15 is specifically: after the data acquisition is completed, the scanning data should be imported into the computer, the completeness and usability of the monitoring data coverage range and the scanning volume unit data are checked, and the missing and abnormal data should be timely rescanned; The step S21 is specifically: the control points and the scanning volume units are used to match the monitoring data; when the scanning volume units are used to match the monitoring data, not less than 3 homonymous points are used to establish a conversion matrix to match the monitoring data; The step S22 is specifically: not less than 3 homonymous points distributed uniformly are used to convert the coordinate system through a seven-parameter model; the abnormal points and isolated points in the monitoring data which are separated from the storage tank target object are processed by filtering or man-machine interaction noise reduction; the monitoring data file obtained by each scanning surveying point is processed to obtain the monitoring data file of the tank body as a whole; and the three-dimensional space modeling is carried out on the storage tank monitoring data file in the unified coordinate system. The step S23 specifically comprises: monitoring extraction based on the full-size three-dimensional model of the tank in the unified coordinate system, and establishing a monitoring grid; calculating the deformation key index data of the tank three-dimensional space model based on the extracted monitoring and the established triangular grid, calculating the tank wall height, fitting the cross-section center of the wall plate of different heights of the tank, and processing the section to calculate the tank wall inner radius, local concave-convex deformation value, and ellipticity, and using data interpolation to calculate the tank wall inclination and settlement.

6. The monitoring method of the dangerous chemical tank risk monitoring device according to claim 5, characterized in that: The step S31 specifically comprises: using the obtained structural deformation key index quantity to evaluate the tank foundation deformation, the tank wall perpendicularity and cylindricality deformation, the concave-convexity deformation, and the fixed top support column deformation based on the tank safety evaluation criteria; The step S32 specifically comprises: calculating the stress distribution of the tank under the load state, when the calculated maximum stress value is less than the allowable stress of the tank material, that is, within the allowable range, the tank meets the safety operation requirement, and can continue to operate.

Images