Evaluation method and equipment for pipeline pressure and surrounding environment risk level

Abstract

The invention discloses an evaluation method for pipeline pressure occupation and surrounding environment risk grades, and the method comprises the following specific operation steps: S1, collecting three types of risk grading management and control evaluation indexes, including a pipeline pressure occupation type, a pipeline surrounding environment type and a pipeline basic management type, of a to-be-evaluated pipeline, s2, setting risk grade classification, and executing corresponding risk prevention and control operation in combination with a weighted comprehensive score result of the specified evaluation indexes of the pipeline, so as to obtain a comprehensive score Q of the specified evaluation indexes of the pipeline according to the score result Pi of the M risk grade management and control evaluation indexes and a calculation formula of # imgabs0 #; and S2, setting risk grade classification, and executing corresponding risk prevention and control operation in combination with the weighted comprehensive score result of the specified evaluation indexes of the pipeline. And S2, in the operation process of the step S2, according to the weighted comprehensive score result of the specified evaluation index of the pipeline, determining the pipeline pressure and surrounding environment risk grade, and according to the detailed evaluation result of the specified evaluation index of the pipeline, executing the corresponding risk prevention and control operation. The personal injury risk can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline operation, maintenance and management, and in particular to an evaluation method for assessing the risk level of non-overhead pipeline occupation and surrounding environment, a corresponding risk prevention and control method, equipment and storage medium. Background Art

[0002] Pipeline "occupancy" in underground engineering construction is generally defined as: the area occupied by buildings above the heating pipeline. Since the pipeline is generally composed of seamless steel pipes connected by flanges, and is accompanied by various forms of insulation or anti-corrosion measures on the outside, and withstands the fluid stress of the internal medium, the occupation and the surrounding environment will have different degrees of impact on the pipeline itself, pipeline corrosion, pipeline maintenance and repair, as well as personal and building safety. It will cause uneven settlement of the pipeline, pipeline stress deformation, etc. In severe cases, it may cause the pipeline to bend, deform or even break. It may also cause local current interference in the pipeline, causing the anti-corrosion layer to peel off, the pipeline to be perforated, etc., and thus create a risk of personal injury.

[0003] In order to fully prevent the occurrence of personal injury incidents caused by pipeline occupation and surrounding environment, this application specifically proposes an evaluation method for pipeline occupation and surrounding environment risk level to solve the above technical problems. Summary of the Invention

[0004] The primary objective of this invention is to provide a method for assessing pipeline occupation and surrounding environmental risk levels. This method comprehensively considers multiple risk grading and management evaluation indicators, performs a weighted assessment of pipelines experiencing occupation or surrounding risks, and categorizes the risks currently faced by pipelines into four different levels. By implementing management and control measures, the risk of personal injury is reduced, thereby addressing the technical issues raised in the background art.

[0005] The present invention adopts the following technical solutions to solve the above technical problems:

[0006] A method for evaluating pipeline occupation and surrounding environmental risk levels includes the following specific steps:

[0007] S1. Collect three types of risk classification and control evaluation indicators for the pipeline to be evaluated, including pipeline occupation, pipeline surrounding environment, and pipeline basic management, and score the results P based on M risk classification and control evaluation indicators. i Calculate the comprehensive score Q of the specified evaluation index of the pipeline. The calculation formula is:

[0008] S2. Set risk level classification, and perform corresponding risk prevention and control operations based on the weighted comprehensive score results of the pipeline's designated evaluation indicators.

[0009] Preferably, during the operation of step S2, the risk level of pipeline occupation and surrounding environment is determined according to the weighted comprehensive score results of the pipeline designated evaluation indicators, and the corresponding risk prevention and control operations are performed according to the evaluation results refined according to the pipeline designated evaluation indicators.

[0010] Preferably, the risk level in step S2 is divided into four levels, and the comprehensive scores Q combined with the pipeline specified evaluation indicators are:

[0011] If Q ≥ the preset value a, the pipeline is assessed as risk level 1 and at least the following risk prevention and control actions are implemented: regular drills of emergency plans, increased inspection frequency of the affected pipeline sections, third-party inspections of the affected pipeline sections within a specified time period, third-party risk assessments of the affected pipeline sections within a specified time period, the installation of warning signs, installation and maintenance of remote monitoring devices, notification of risks to the surrounding areas, and strengthening of thermal pipeline equipment management;

[0012] If the preset value a>Q≥preset value b, the pipeline is assessed as a Level 2 risk and at least the following risk prevention and control actions are performed: increase the inspection frequency of the involved pipeline sections, install and maintain remote monitoring devices, record the liquid level and temperature data of the involved pipelines daily, inform the surrounding areas of the risks, take photos of the risks in the pipeline surrounding environment during inspections and update the records in a timely manner, strengthen the basic management of thermal pipeline equipment, and set up warning signs;

[0013] If the preset value b > Q ≥ the preset value c, the pipeline is assessed as a Level 3 risk and at least the following risk prevention and control actions are performed: increase the inspection frequency of the involved pipeline sections, install and maintain remote monitoring devices, record the liquid level and temperature data of the involved pipelines daily, inform the surrounding areas of the risks, take photos of the risks in the pipeline surrounding environment during inspections and update the records in a timely manner, and strengthen the basic management of thermal pipeline equipment;

[0014] Q<preset value c, the pipeline assessment is set to level 4 risk, and at least the following risk prevention and control operations are performed: take photos of the risks in the surrounding environment of the pipeline during inspections and update the records in a timely manner, and strengthen the basic management of thermal pipeline equipment.

[0015] Preferably, the pipeline occupation risk classification management and control evaluation index is set to be an occupation length index for determining whether the pipeline occupation length is greater than or equal to 50 meters;

[0016] If the pipeline occupied length is greater than or equal to 50 meters, the evaluation is 1 point; if the pipeline occupied length is less than 50 meters, the evaluation is 0 point.

[0017] Preferably, the pipeline surrounding environment risk classification management and control evaluation indicators include any one or any combination of the following:

[0018] Determine whether there is a building directly above the pipeline: if there is a building directly above the pipeline, the score is 2; if not, the score is 0;

[0019] Determine whether the pipeline passes through a public activity place where more than 50 people gather at the same time. If so, the score is 10 points; if not, the score is 0 points.

[0020] Determine whether there is an underground passage or low-lying road section within 5 meters of the pipeline. If there is an underground passage or low-lying road section within 5 meters of the pipeline, the evaluation is 2 points; if not, the evaluation is 0 points;

[0021] Determine whether there is a culvert under a bridge within 5 meters of the pipeline. If there is a culvert under a bridge within 5 meters of the pipeline, the evaluation is 2 points; if not, the evaluation is 0 points;

[0022] Determine whether there is a basement or semi-basement within 5 meters of the pipeline. If there is a basement or semi-basement within 5 meters of the pipeline, the evaluation is 9 points; if not, the evaluation is 0 points;

[0023] Determine whether there is an underground shopping mall or garage within 5 meters of the pipeline. If there is an underground shopping mall or garage within 5 meters of the pipeline, the evaluation is 4 points; if not, the evaluation is 0 points;

[0024] Determine whether the pipeline needs to enter the closed management area for maintenance and inspection. If it is necessary to enter the closed management area for maintenance and inspection, the evaluation is 3 points; if not, the evaluation is 0 points;

[0025] Determine whether there is a structure directly above the pipeline. If there is a structure directly above the pipeline, the score is 1; if not, the score is 0.

[0026] Preferably, in the step S2, the risk prevention and control operations are optimized based on the pipeline surrounding environment risk classification management and control evaluation indicators during the corresponding risk prevention and control operations, including:

[0027] If the evaluation score is 0 when judging whether the pipeline passes through a public activity place where more than 50 people gather at the same time, and the evaluation score is also 0 when judging whether there is a basement or semi-basement within 5 meters of the pipeline, the inspection frequency will not be increased when increasing the inspection frequency of the pipe section involved. Otherwise, one inspection will be added on top of the normal inspection.

[0028] When determining whether the pipeline needs to enter a closed management area for maintenance and inspection, if the evaluation score is 0, then one inspection will be added to the normal inspection frequency in the process of increasing the inspection frequency of the pipeline section area; if the evaluation score is 3, then the risk situation will be informed to the surrounding units every year during the risk notification process, and remote monitoring devices must be installed and maintained.

[0029] Preferably, the pipeline infrastructure management risk classification control evaluation indicators include any one or any combination of the following:

[0030] Determine whether the pipeline is laid in direct burial, trench, or overhead. If it is laid in direct burial, the evaluation is 2 points; if it is laid overhead, the evaluation is 1 point; if it is laid in trench, the evaluation is 0 points;

[0031] Determine whether the nominal diameter of the pipe is greater than or equal to the specified size. If the nominal diameter is greater than or equal to the specified size, the evaluation is 1 point; if the nominal diameter is less than the specified size, the evaluation is 0 point.

[0032] Determine whether the medium in the pipeline is steam or hot water. If the medium in the pipeline is steam, the evaluation is 2 points; if the medium in the pipeline is hot water, the evaluation is 1 point;

[0033] Determine whether the corrosion depth of the pipe wall exceeds 1 / 3 of the original wall thickness. If the corrosion depth exceeds 1 / 3 of the original wall thickness, the evaluation is 5 points; if not, the evaluation is 0 points;

[0034] Determine whether the pipeline has been in use for more than the specified number of years. If the pipeline has been in use for more than the specified number of years, the score is 1; if the pipeline has been in use for less than or equal to the specified number of years, the score is 0.

[0035] Determine whether the pipeline has undergone three emergency repairs within a year, one emergency repair within three years, or no emergency repair within three years. If three emergency repairs have occurred within a year, the evaluation is 8 points; if one emergency repair has occurred within three years, the evaluation is 5 points; if no emergency repair has occurred within three years, the evaluation is 0 points.

[0036] Preferably, in the process of executing the corresponding risk prevention and control operation in step S2, the risk prevention and control operation is optimized based on the pipeline basic management risk classification control evaluation index, including:

[0037] In determining whether the corrosion depth of the pipeline wall exceeds 1 / 3 of the original wall thickness, if the evaluation score is 5 points, the inspection operation will be carried out every year when the third party inspects the involved pipe section. If the evaluation score is 0 points, the inspection operation will be carried out every 3 years when the third party inspects the involved pipe section.

[0038] In determining whether the pipeline has been in service for more than the specified number of years, if the evaluation score is 1, the third party will conduct an inspection every year when conducting a risk assessment on the pipeline section involved; if the evaluation score is 0, the inspection will be conducted every three years when conducting a risk assessment on the pipeline section involved;

[0039] In determining whether a pipeline has undergone three emergency repairs within a year, one emergency repair within three years, or no emergency repair within three years, if the evaluation score is 8 points, an emergency drill will be conducted for the pipeline section involved every month when the emergency plan is regularly practiced; if the evaluation score is 5 points, an emergency drill will be conducted for the pipeline section involved every quarter when the emergency plan is regularly practiced; if the evaluation score is 0 points, an emergency drill will be conducted for the pipeline section involved every year when the emergency plan is regularly practiced.

[0040] Preferably, the preset value a, preset value b, and preset value c are all determined based on the collected specified risk classification control evaluation indicators, including:

[0041] The preset value a is the sum of the scores for determining whether the pipeline passes through a public activity venue where more than 50 people gather at the same time, whether there is a basement or semi-basement within 5 meters of the pipeline, whether there is an underground shopping mall or garage within 5 meters of the pipeline, and whether the pipeline has undergone three emergency repairs within a year, one emergency repair within three years, or no emergency repair within three years.

[0042] The preset value b is the sum of the evaluation scores for determining whether the pipeline passes through a public activity venue where more than 50 people gather at the same time and the evaluation scores for determining whether there is a basement or semi-basement within 5 meters of the pipeline.

[0043] The preset value c is the average value of the preset value a for different types of indicators.

[0044] Preferably, a device for evaluating the risk level of pipeline occupation and surrounding environment has a computer program stored therein, and when the computer program is executed by a processor, it is used to perform any of the above-mentioned methods for evaluating the risk level of pipeline occupation and surrounding environment, including:

[0045] Input module, used to collect risk classification and control evaluation indicators of the pipeline to be evaluated;

[0046] The calculation and evaluation module is used to calculate the comprehensive score of the pipeline's designated evaluation indicators based on the collected risk classification and control evaluation indicators of the pipeline to be evaluated, and determine the risk prevention and control operation steps to be executed based on the grade classification of the score results;

[0047] The output module optimizes and outputs the description of the risk prevention and control operation steps performed based on the specific evaluation scores of the risk classification and control evaluation indicators.

[0048] In another aspect, the present invention further discloses a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the above method.

[0049] As can be seen from the above technical solution, the present invention provides a method for evaluating pipeline occupation and surrounding environmental risk levels. Compared with the existing technology, the present invention has the following advantages:

[0050] 1. The present invention adopts a pipeline occupation and surrounding environment grade assessment system. On the premise of effectively counting the risks of occupation and surrounding environment, it establishes a targeted evaluation and rating of personal injury risks through the three evaluation indicator dimensions of "pipeline occupation category", "pipeline surrounding environment category" and "pipeline basic management category". It conducts a weighted assessment of pipelines that are occupied or have risks in the surrounding area. Through the implementation and control of corresponding measures, the purpose of reducing personal injury risks can be achieved.

[0051] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become easy to understand through the following description. Of course, it is not necessary to achieve all of the above-mentioned advantages simultaneously in order to implement any product of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0053] Figure 1 It is a schematic diagram of the overall operation flow of the present invention. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0055] In the embodiment, see Figure 1 .

[0056] like Figure 1 The method for evaluating pipeline occupation and surrounding environment risk level proposed in the embodiment of the present invention includes the following steps:

[0057] S1. Collect three types of risk classification and control evaluation indicators for the pipeline to be evaluated, including pipeline occupation, pipeline surrounding environment, and pipeline basic management, and score the results P based on M risk classification and control evaluation indicators. i Calculate the comprehensive score Q of the specified evaluation index of the pipeline. The calculation formula is:

[0058] Specifically, we first collect M items of information about the laying method of the pipeline to be evaluated, the nominal diameter DN (mm), the pipeline medium, whether there are buildings directly above the pipeline, the occupied length (m), whether the pipeline passes through a public activity place where more than 50 people gather at the same time, whether there are underground passages or low-lying sections of the road within 5 meters of the pipeline, whether there are culverts under bridges within 5 meters of the pipeline, whether there are basements or semi-basements within 5 meters of the pipeline, whether there are underground shopping malls or garages within 5 meters of the pipeline, whether it is necessary to enter a closed management area for maintenance and inspection, whether the depth of pipe wall corrosion exceeds 1 / 3 of the original wall thickness, whether there are structures directly above the pipeline, the date the pipeline was put into use, and the number of emergency repairs that occurred on the pipeline within three years, etc., to provide basic data for the occupancy of the pipeline and the graded assessment of the surrounding environment.

[0059] S2. Set risk level classification, and perform corresponding risk prevention and control operations based on the weighted comprehensive score results of the pipeline's designated evaluation indicators.

[0060] Specifically, pipelines are divided into four risk levels based on the weighted comprehensive scores of M evaluation indicators. Finally, targeted control measures are proposed and implemented to reduce the risk of personal injury.

[0061] In a specific embodiment, M is set to 15 evaluation indicators, and the weights of the 15 evaluation indicators include:

[0062] (1) Laying method (P1): Determine whether the pipeline is laid in a direct burial, trench, or overhead. If it is laid in a direct burial, the evaluation is 2 points; if it is laid in an overhead, the evaluation is 1 point; if it is laid in a trench, the evaluation is 0 points.

[0063] Because different laying methods have significantly different abilities to withstand pipeline stress and external impact, direct-buried pipelines are buried directly underground and are susceptible to soil corrosion and foundation settlement. If the anti-corrosion layer is damaged or the backfill is not dense, pipeline deformation and leakage may occur (for example, a direct-buried pipeline on a city's main road cracked its welds due to soil settlement, resulting in a steam leakage accident); trench-laid pipelines are placed in concrete or brick trenches to reduce direct soil pressure, but water accumulation and poor ventilation in the trenches may accelerate pipeline corrosion (for example, an old trench failed to drain water, resulting in pitting and perforation on the outer wall of the pipeline); overhead-laid pipelines are exposed on ground supports and are greatly affected by wind loads and temperature changes, requiring enhanced seismic resistance and expansion joint design (for example, an overhead pipeline in the north failed its compensator due to extreme low temperatures, causing the pipeline to crack);

[0064] At the same time, direct-buried pipeline faults are difficult to locate, and emergency repairs require excavation of the road surface, which is time-consuming and costly (for example, a direct-buried pipeline in a residential area leaked, requiring the asphalt pavement to be demolished, with a repair cycle of up to 72 hours). The initial investment is low, but the subsequent costs of repairing the anti-corrosion layer and rescuing leaks are high. The inspection channels for trenches and overhead pipelines are clear, and defects can be quickly located visually or with instruments, without requiring large-scale earthwork for repairs (for example, an industrial area uses drones to inspect overhead pipelines, and timely repairs are made after discovering damaged insulation layers to prevent leaks). The initial costs of supports and insulation are high, but the maintenance costs over the life cycle are lower (for example, a comparison at a thermal power plant shows that the total cost of direct-buried pipelines over 20 years is 35% higher than that of overhead pipelines). In addition, when a direct-buried pipeline leaks, high-temperature steam or hot water may diffuse through soil pores, causing ground collapse or secondary disasters (for example, a direct-buried pipeline leak caused a short circuit in underground cables, resulting in a regional power outage).

[0065] When an overhead pipeline leaks, the medium sprays directly into the air, which can easily cause burns to people, but the spread is controllable (for example, a valve leak on an overhead steam pipeline did not affect surrounding buildings after emergency isolation).

[0066] Therefore, the judgment of the pipeline laying method belongs to the evaluation of the basic information of the pipeline and can reflect the safety of the pipeline structure.

[0067] (2) Nominal diameter (P2): Determine whether the nominal diameter of the pipe is greater than or equal to 200 mm. If the nominal diameter is greater than or equal to 200 mm, the score is 1 point; if the nominal diameter is less than 200 mm, the score is 0 point.

[0068] Large-diameter pipes (DN200 and above) can leak large amounts of media in a single leak, potentially causing regional heating outages or secondary disasters (e.g., a DN700 steam main rupture, causing the spread of high-temperature steam to damage vegetation in surrounding green belts). Small-diameter pipes (less than DN200) leak less, but are more concealed and prone to long-term leakage, causing foundation erosion (e.g., a chronic leak in a DN150 buried hot water pipe caused the collapse of a manhole after one year). For example, when installed in a basement, small-diameter pipes pose less risk to human health than large-diameter pipes in the presence of human activity. Therefore, the nominal diameter can be used to characterize the amount of leakage and the scope of impact.

[0069] (3) Pipeline medium (P3): Determine whether the medium in the pipeline is steam or hot water. If the pipeline medium is steam, the score is 2 points; if the pipeline medium is hot water, the score is 1 point.

[0070] Due to the high temperature hot water, dissolved oxygen, chloride ions (Cl - ) can easily cause uniform corrosion or pitting of carbon steel pipes (such as a heating pipe network Cl -Exceeding the standard by 50mg / L can lead to pitting depths of up to 2.5mm on the inner wall of a DN300 pipe within three years. Steam: High-speed steam erodes pipe walls, accelerating erosion at welds and elbows (case in point: a DN400 steam pipe elbow at a power plant saw a 40% reduction in wall thickness over two years due to a flow rate exceeding 25m / s). Thermal oil (an organic heat carrier) can undergo long-term high-temperature operation, causing oil cracking and generating acidic substances that corrode the pipe. For example, a thermal oil pipe at a chemical plant, due to lack of regular oil replacement, corroded and leaked flange sealing surfaces. If a leak occurs simultaneously in a human workplace, hot water poses less risk to personnel than steam. Therefore, pipeline media can further reflect both the medium type and the corrosion mechanism.

[0071] (4) Whether there is a building directly above the pipeline (P4): Determine whether there is a building directly above the pipeline. If there is a building directly above the pipeline, the score is 2; if not, the score is 0.

[0072] It should be noted that the transmission of building weight and operational loads to pipelines through the foundation may result in excessive pipeline ovality or localized stress concentration (for example, a six-story residential building was built directly above a DN300 direct-buried pipeline in a residential complex, resulting in a 3mm dent and deformation at the top of the pipeline after three years). In severe cases, this can cause pipeline leakage and personal injury. Therefore, the determination of the presence of a building directly above the pipeline can be used to reflect the additional load and structural risk to the pipeline. Furthermore, localized stress concentration due to short-distance occupancy can cause excessive pipe ovality (for example, the ovality of a DN300 pipeline increased from 1.2% to 4.5% within an 8m occupancy section, causing weld cracking). Continuous uneven loading due to long-distance occupancy can cause overall bending deformation of the pipeline, accelerating corrosion fatigue (for example, a DN500 pipeline was continuously occupied for 62m, resulting in a total axial crack length exceeding 15m after five years of operation). In severe cases, this can cause pipeline leakage and personal injury. Therefore, the determination of the presence of a building directly above the pipeline can further characterize the stress accumulation effect of continuous occupancy.

[0073] In addition, confined spaces such as basements and semi-basements in buildings may become gathering areas for leaking media (such as steam and hot water), causing personal injury (case example: steam leaked from a DN200 hot water pipe and seeped into an underground garage, damaging the vehicle's electronic components). Crowded areas within buildings (such as shopping malls and office buildings) increase the risk of casualties from leakage accidents (for example, a DN500 steam main ruptured, allowing high-temperature steam to invade an office building through the ventilation system, resulting in scalding for 12 people). Therefore, the presence of a building directly above the pipeline can further reflect the consequences of the leakage.

[0074] (5) Occupied Length (P5): Determines whether the occupied length of the pipeline is greater than or equal to 50 meters. If the occupied length of the pipeline is greater than or equal to 50 meters, the score is 1; if the occupied length of the pipeline is less than 50 meters, the score is 0.

[0075] Since the longer the length of the same pipe diameter, the larger the pipeline volume, within the occupied length section and under the same medium, the shorter the length, the lower the risk of human injury. Therefore, the occupied length of the pipeline can represent the consequences of leakage.

[0076] At the same time, since conventional detection equipment (such as magnetic flux leakage detectors) cannot pass through when the occupied length exceeds 20m, the defect identification rate drops by more than 70% (case: a corrosion pit in a 25m occupied section of a DN350 pipeline was missed, and a sudden leak occurred one year later); long-distance occupied areas cannot be excavated for verification and must rely on indirect detection technology (for example, a DN600 pipeline used transient electromagnetic method + geological radar scanning to find three wall thinning points in the occupied section); for every 10m increase in occupied length, the traditional excavation repair time is extended by 50% (for example, a DN200 pipeline occupied section of 40m required emergency repairs to demolish four temporary buildings, which took 120 hours); confined space operations require the use of non-destructive technology (for example, a DN450 occupied section of 55m was repaired with UV-cured lining, and the construction period was shortened to 72 hours). Therefore, the occupied length can further reflect the impact on the efficiency of detection, maintenance and emergency response.

[0077] (6) The pipeline passes through a public activity place where more than 50 people gather at the same time (P6): Determine whether the pipeline passes through a public activity place where more than 50 people gather at the same time. If the pipeline passes through a public activity place where more than 50 people gather at the same time, the score is 10; if not, the score is 0.

[0078] Since leakage of high-temperature steam or hot water in ordinary public places (shopping malls, subway stations) may cause mass scalding (case: a DN300 steam branch pipe in a shopping mall ruptured, and the leaked steam spread to the atrium through the vents, causing second-degree scalding to 26 people); leakage of toxic media (such as biphenyl mixtures) in special sensitive places (hospitals, schools) may cause mass poisoning (for example, a DN250 pipeline in a hospital leaked sulfur-containing exhaust gas, causing respiratory damage to 8 patients), this part can represent the exposure risk of the population.

[0079] Specifically, since the risk of harm to people in public activity places where the number of people gathered is less than 50 is lower than when the number of people exceeds 50, further consideration is given to quantifying to 50 people. Therefore, the evaluation temperature is limited to "the pipeline passes through a public activity place where the number of people gathered at the same time is more than 50", which can be used to characterize the consequences of leakage.

[0080] (7) There are underground passages or low-lying road sections within 5 meters of the pipeline (P7): Determine whether there are underground passages or low-lying road sections within 5 meters of the pipeline. If there are underground passages or low-lying road sections within 5 meters of the pipeline, the evaluation is 2 points; if there are no underground passages or low-lying road sections within 5 meters of the pipeline, the evaluation is 0 points. This part can represent:

[0081] a. When the depth of water accumulation in low-lying areas exceeds 1m, hydrostatic pressure may cause pipes to float or joints to misalign (case in point: after a heavy rain, two welds on a DN400 pipe were torn due to 1.5m of water accumulation in a low-lying section of the highway). Groundwater penetration and corrosion, as well as fluctuations in groundwater levels in low-lying areas, accelerate the peeling of the pipe's outer anti-corrosion coating (for example, a DN300 pipe operated in a low-lying section of the highway experienced a wall corrosion rate of 0.8mm / year after three years). Therefore, this part can represent the effects of water immersion and buoyancy.

[0082] b. Dynamic loads from heavy vehicles (axle loads > 10t) are transmitted to pipelines through the roadbed, causing fatigue damage (case study: a DN500 pipeline located 4m from a low-lying section of a highway experienced 2,000 vehicle vibrations daily, resulting in a circumferential crack that grew to 12cm within five years). Settlement of underground tunnel structures can also compress pipelines (for example, construction of a subway tunnel resulted in local bending deformation of an adjacent DN350 pipeline reaching 3.2%). Therefore, this component can represent the risk of traffic load transfer.

[0083] c. Due to the "water-collecting effect" in low-lying areas, leaked media converge along the terrain (for example, a DN250 hot water pipe leaked, causing 80°C hot water to flow back into an underground tunnel through a drainage ditch, scalding three maintenance personnel); pipeline leaks soften the roadbed in low-lying areas (for example, a DN450 pipe leak caused the moisture content of the highway foundation to exceed 30%, resulting in a road surface collapse area of ​​20 square meters); and high-temperature media bake the structure of underground tunnels (a DN300 steam pipe leaked, and the continued high temperature caused the tunnel concrete strength to decrease by 40%). Therefore, this component can represent the risk of directional media migration.

[0084] (8) There is a culvert under a bridge within 5 meters of the pipeline (P8): Determine whether there is a culvert under a bridge within 5 meters of the pipeline. If there is a culvert under a bridge within 5 meters of the pipeline, the evaluation is 2 points; if not, the evaluation is 0 points. This part can be represented by:

[0085] a. Due to insufficient space for pipeline maintenance within the culvert, conventional inspection equipment cannot enter (case in point: the magnetic flux leakage inspection coverage rate of a DN450 pipeline culvert section was only 30%, leaving undetected corrosion pits). Therefore, this section can represent a missing maintenance channel.

[0086] b. Since the culvert water mixed with the leaking medium in the pipe forms a corrosive solution (case: a DN300 chlorine-containing hot water pipe leaked, reacting with the snowmelt water in the culvert, the pipe wall corrosion rate increased to 1.2mm / year), this part can represent the cross-contamination risk.

[0087] (9) Basement or semi-basement within 5 meters of the pipeline (P9): Determine whether there is a basement or semi-basement within 5 meters of the pipeline. If there is a basement or semi-basement within 5 meters of the pipeline, the evaluation is 9 points; if not, the evaluation is 0 points. This part can represent:

[0088] a. During periods of heavy rain, municipal drainage is overloaded, and water in basements backflows into pipe wells (case study: a DN450 pipe inspection well is connected to a semi-basement drainage ditch. After a heavy rain, the water in the well accumulated to a depth of 2.1 meters, causing the insulation layer to fail); or buoyancy damage caused by rising groundwater levels (for example, a DN250 pipe adjacent to a semi-basement experienced a 1.8-meter rise in groundwater levels, causing the pipe to float 30 cm). This section can indicate immersion due to backflow.

[0089] b. When the relative humidity in the basement is greater than 85%, the condensation corrosion rate on the outer wall of the pipe increases by 3 times (case study: a DN300 pipe operated in a semi-basement area for 2 years experienced a 25% wall thickness reduction). Infiltration of deicing agents leads to electrochemical corrosion (for example, a DN400 pipe located 3m from the basement entrance and exit had a chloride ion concentration exceeding 2000mg / L and a pitting depth of 4mm / year). This indicates accelerated corrosion in a high-humidity environment.

[0090] c. Since confined spaces such as basements and semi-basements in buildings may become gathering areas for leaking media (such as steam and hot water), causing personal injury (case example: steam leaked from a DN200 hot water pipe and seeped into an underground garage, causing damage to the vehicle's electronic components), this section can reflect the consequences of the leakage.

[0091] (10) There is an underground shopping mall or garage within 5 meters of the pipeline (P10): Determine whether there is an underground shopping mall or garage within 5 meters of the pipeline. If there is an underground shopping mall or garage within 5 meters of the pipeline, the evaluation is 4 points; if not, the evaluation is 0 points. This part can be represented by:

[0092] Leaked gas can spread through a shopping mall's ventilation system (for example, a DN200 pipe leak caused methane concentrations in an underground shopping mall to reach 20% of the lower explosion limit within an hour); steam pipe leaks can trigger panic stampedes (for example, a DN450 heating pipe burst, causing high-temperature steam to block the exit of an underground garage and delay evacuation by 30 minutes). Buildings with underground shopping malls or garages can become areas where leaked media (such as steam or hot water) can accumulate, causing personal injury. Therefore, this section can be represented as a threat of toxic media spread and the consequences of leakage.

[0093] (11) Whether it is necessary to enter the closed management area for maintenance and inspection (P11): Determine whether it is necessary to enter the closed management area for maintenance and inspection of the pipeline. If it is necessary to enter the closed management area for maintenance and inspection, the evaluation score is 3 points; if it is not necessary, the evaluation score is 0 points.

[0094] Since access to relevant areas is restricted, the daily maintenance of pipeline equipment is affected. At the same time, the unknown nature of the restricted areas makes it impossible to effectively identify hazardous sources and formulate corresponding control measures. Therefore, this part can also be used to reflect the risk of missed inspections and blind spots in the recognition of hazardous sources.

[0095] (12) Pipe wall corrosion depth exceeds 1 / 3 of the original wall thickness (P12): Determine whether the pipe wall corrosion depth exceeds 1 / 3 of the original wall thickness. If the pipe wall corrosion depth exceeds 1 / 3 of the original wall thickness, the evaluation is 5 points; if not, the evaluation is 0 points.

[0096] It should be noted that when the pit depth ratio is greater than 1 / 3: the depth of a single corrosion pit reaches 33% of the wall thickness, the stress concentration factor is greater than 3.5 (case: a DN300 pipeline bursts under operating pressure due to pitting depth of 8mm (wall thickness 24mm), causing personal injury. Therefore, this part can be used to reflect the local corrosion concentration effect.

[0097] (13) Structures directly above the pipeline (P13): Determine whether there are structures directly above the pipeline. If there are structures directly above the pipeline, the score is 1; if not, the score is 0.

[0098] At this time, due to the vertical load of the building foundation, the additional stress of the frame structure building pile foundation causes the pipe ovality to deform. Severe deformation can cause pipe leakage and cause personal injury, so this part can be used to reflect the static load transfer effect.

[0099] (14) Commissioning date (P14): Determine whether the pipeline has been in operation for more than 30 years. If the commissioning date is more than 30 years, the score is 1; if it is less than or equal to 30 years, the score is 0.

[0100] At this time, due to the exceeding of the design life limit, the pipeline operation time exceeds the design life (case: a DN400 pipeline has been in service for 12 years, and the probability of circumferential stress corrosion cracking increases by 80%); the pipeline ruptures and causes personal injury, so this part can be used to reflect the risk of over-service.

[0101] (15) Number of emergency repairs (P15): Determines whether the pipeline has undergone three emergency repairs within a year, one emergency repair within three years, or no emergency repair within three years. If three emergency repairs occurred within a year, the evaluation is 8 points; if one emergency repair occurred within three years, the evaluation is 5 points; if no emergency repair occurred within three years, the evaluation is 0 points. This part has the following effects:

[0102] (a) Due to long-term use, heating pipes will age due to various factors, such as thermal expansion and contraction, soil settlement, and aging of the pipe materials themselves. Aging pipes are more prone to rupture, corrosion and perforation, and require emergency repairs. For example, the heating pipe network in an old residential area has been in use for a long time, and the inner wall of the pipes has corroded and the outer wall has worn, resulting in frequent "leakage" and an increase in the number of emergency repairs. Therefore, the number of emergency repairs within three years can, to a certain extent, directly reflect the aging and damage status of the pipeline system. The more times, the more serious the pipeline aging may be and the greater the safety risks. Therefore, this part can be used to reflect the degree of pipeline aging and damage.

[0103] (b) External factors such as geological activity, extreme weather, and municipal construction can damage heating pipelines. For example, heavy rain can cause ground collapse, damaging buried pipelines, and municipal construction can dig up heating pipelines. If a region has required a high number of emergency repairs to heating pipelines due to external environmental factors over a three-year period, this indicates that the pipelines in that area are significantly impacted by the external environment and present a high safety risk. By counting the number of emergency repairs, we can assess the threat posed by the external environment to pipeline safety and enable appropriate protective measures to be implemented. Therefore, this component can be used to reflect the impact of the external environment.

[0104] (c) Routine maintenance and management by heating companies is crucial for reducing pipeline failures and the number of emergency repairs. Regular inspections, timely maintenance, and proactive preventive repairs can effectively reduce the probability of pipeline problems. If a heating company's thermal pipelines undergo a low number of emergency repairs over a three-year period, this generally indicates a high level of maintenance and management, enabling them to promptly identify and address potential problems. Conversely, a high number of emergency repairs may indicate deficiencies in maintenance and management, such as inadequate inspections and untimely repairs. This can in turn prompt improvements in maintenance and management, enhancing pipeline operational safety. Therefore, this component can be used to measure maintenance and management performance.

[0105] (d) Frequent repairs typically indicate a higher safety risk in the piping system. Frequent repairs not only affect residents' regular heating supply but can also lead to significant hot water loss, unstable heating system pressure, and even more serious safety incidents. The presence of occupational hazards and the surrounding environment can increase the potential for personal injury, such as burns from hot water leaks. Therefore, this section can be used to assess safety risk.

[0106] In summary, combining the above 15 evaluation indicators can more comprehensively and accurately assess the safety risk level of pipelines, and the implementation of reasonable risk control measures can reduce the risk of personal injury.

[0107] On the other hand, the present invention also discloses a corresponding risk prevention and control method for evaluating the risk level of pipeline occupation and surrounding environment of non-overhead pipelines, which is used to determine the risk level of pipeline occupation and surrounding environment based on the weighted comprehensive score results of the pipeline-specified evaluation indicators, and perform corresponding risk prevention and control operations according to the refined evaluation results of the pipeline-specified evaluation indicators.

[0108] In the specific embodiment, since P6+P9+P10+P15=31, these four indicators are important evaluation directions. Therefore, if all of them are met, the pipeline should be considered to have a significant risk.

[0109] If Q ≥ 31, the pipeline is assessed as a Level 1 risk. For Level 1 risk, the following implementation measures are implemented to carry out risk prevention and control work in the surrounding environment:

[0110] (1) Improve relevant emergency response plans and conduct regular drills. If the P15 evaluation score is 8, an emergency drill should be conducted monthly for the relevant pipeline section. If the P15 evaluation score is 5, an emergency drill should be conducted quarterly for the relevant pipeline section. If the P15 evaluation score is 0, an emergency drill should be conducted annually for the relevant pipeline section.

[0111] (2) Increase the inspection frequency of the involved pipe section. If the P6 evaluation score is 10 points and the P9 evaluation score is 9 points, the involved pipe section should increase the inspection frequency by 2 times on the basis of the normal inspection. If the P6 evaluation score is 0 points and the P9 evaluation score is 9 points, the involved pipe section should increase the inspection frequency by 1 time on the basis of the normal inspection. If the P6 evaluation score is 10 points and the P9 evaluation score is 0 points, the involved pipe section should increase the inspection frequency by 1 time on the basis of the normal inspection. If the P6 evaluation score is 0 points and the P9 evaluation score is 0 points, the inspection frequency of the involved pipe section does not need to be increased. If the P11 evaluation score is 0 points, the involved pipe section should increase the inspection frequency by 1 time on the basis of the normal inspection.

[0112] (3) Hire a qualified third-party testing company to inspect the involved pipe sections and require them to issue a conclusive test report on whether the equipment meets the operating conditions. If the P12 evaluation score is 5, the involved pipe sections should be inspected annually. If the P12 evaluation score is 0, the involved pipe sections should be inspected within 3 years.

[0113] (4) Engage a competent third-party assessment agency to conduct a risk assessment of the involved pipeline sections and issue an assessment report that clearly defines the risk classification and response measures, including the following implementation measures. If the P14 assessment score is 1, the involved pipeline sections should be inspected annually. If the P14 assessment score is 0, the involved pipeline sections should be inspected within 3 years.

[0114] (5) Set up warning signs.

[0115] (6) Strengthen the maintenance of remote monitoring devices. If the P11 evaluation score is 3 points, a remote monitoring device must be installed. If the P11 evaluation score is 0 points, the relevant pipe section should be inspected once in addition to the normal inspection.

[0116] (7) Promptly inform surrounding entities of risks (hidden dangers) and sign the "Notice of Occupied Heat Pipelines and Surrounding Risks (Hidden Dangers)". The P11 evaluation score is 3 points. It is necessary to ensure that surrounding entities are informed of risks (hidden dangers) annually and sign the "Notice of Occupied Heat Pipelines and Surrounding Risks (Hidden Dangers)".

[0117] (8) Strengthen the management of thermal pipeline equipment.

[0118] Because P6+P9=19, these two indicators are the key evaluation directions. If all of them are met, the pipeline should be considered to have a high risk. If 31>Q≥19, then the pipeline is evaluated as a level 2 risk. For level 2 risk, the following implementation measures are available:

[0119] (1) Increase the inspection frequency. If the P6 evaluation score is 10 points and the P9 evaluation score is 9 points, the pipeline section involved should be inspected once more on the basis of normal inspections. If the P6 evaluation score is 0 points and the P9 evaluation score is 9 points, the pipeline section involved should be inspected once more on the basis of normal inspections. If the P6 evaluation score is 10 points and the P9 evaluation score is 0 points, the pipeline section involved should be inspected once more on the basis of normal inspections. If the P6 evaluation score is 0 points and the P9 evaluation score is 0 points, the inspection frequency of the pipeline section involved does not need to be increased. If the P11 evaluation score is 0 points, the pipeline section involved should be inspected once more on the basis of normal inspections.

[0120] (2) Strengthen remote monitoring of adjacent chambers in the affected pipeline section and record the liquid level and temperature data of the affected pipeline daily. If the P11 evaluation score is 3 points, a remote monitoring device must be installed. If the P11 evaluation score is 0 points, the affected pipeline section should be inspected once in addition to the normal inspection.

[0121] (3) Inform surrounding entities of the risks (hidden dangers) and send a "Notice of Occupied Heat Pipelines and Surrounding Risks (Hidden Dangers)". The P11 evaluation score is 3 points. It is necessary to ensure that surrounding entities are informed of the risks (hidden dangers) annually and sign the "Notice of Occupied Heat Pipelines and Surrounding Risks (Hidden Dangers)".

[0122] (4) During inspections, take photos of risks in the environment surrounding the pipeline and update the records in a timely manner.

[0123] (5) Strengthen the basic management of thermal pipeline equipment.

[0124] (6) Set up warning signs.

[0125] Because P6+P9+P10+P15=31, these four indicators are important evaluation directions, and their average evaluation score is about 8 points. Therefore, pipelines that meet one of the risks and have one or two conventional risks are considered to have general risks. If 19>Q≥8, then the pipeline is evaluated as level 3 risk. For level 3 risks, the following implementation measures are available:

[0126] (1) Increase the inspection frequency. If the P6 evaluation score is 10 points and the P9 evaluation score is 9 points, the pipeline section involved should be inspected once more on the basis of normal inspections. If the P6 evaluation score is 0 points and the P9 evaluation score is 9 points, the pipeline section involved should be inspected once more on the basis of normal inspections. If the P6 evaluation score is 10 points and the P9 evaluation score is 0 points, the pipeline section involved should be inspected once more on the basis of normal inspections. If the P6 evaluation score is 0 points and the P9 evaluation score is 0 points, the inspection frequency of the pipeline section involved does not need to be increased. If the P11 evaluation score is 0 points, the pipeline section involved should be inspected once more on the basis of normal inspections.

[0127] (2) Strengthen remote monitoring of adjacent chambers in the affected pipeline section and record the liquid level and temperature data of the affected pipeline daily. If the P11 evaluation score is 3 points, a remote monitoring device must be installed. If the P11 evaluation score is 0 points, the affected pipeline section should be inspected once in addition to the normal inspection.

[0128] (3) Inform surrounding entities of the risks (hidden dangers) and send a "Notice of Occupied Heat Pipelines and Surrounding Risks (Hidden Dangers)". The P11 evaluation score is 3 points. It is necessary to ensure that surrounding entities are informed of the risks (hidden dangers) annually and sign the "Notice of Occupied Heat Pipelines and Surrounding Risks (Hidden Dangers)".

[0129] (4) During inspections, take photos of risks in the environment surrounding the pipeline and update the records in a timely manner.

[0130] (5) Strengthen the basic management of thermal pipeline equipment.

[0131] Pipelines with a risk lower than the above are considered low-risk pipelines. If Q < 8, the pipeline is assessed as level 4 risk. For level 4 risk, the following implementation measures are available:

[0132] (1) During inspections, take photos of risks in the environment surrounding the pipeline and update the records in a timely manner.

[0133] (2) Strengthen the basic management of thermal pipeline equipment.

[0134] In summary, further occupation and management of the surrounding environment should be carried out according to the following steps: demolish the buildings and structures involved in the risk → transform the pipeline routes involved → carry out pipeline management and maintenance work.

[0135] For occupation and surrounding environment that cannot be immediately lifted, operational measures for occupation and surrounding environment risks should be adaptively adjusted in combination with the results of risk assessment.

[0136] Therefore, the present invention uses a pipeline occupation and surrounding environment level assessment system to effectively count the risks of occupation and surrounding environment, establish a targeted evaluation rating of personal injury risks by specifying evaluation index dimensions, and implement corresponding measures to reduce the risk of personal injury.

[0137] On the other hand, the present invention further discloses a device for evaluating the risk level of pipeline occupation and surrounding environment, wherein a computer program is stored therein. When the computer program is executed by a processor, it is used to perform any of the above-mentioned methods for evaluating the risk level of pipeline occupation and surrounding environment. The device further includes:

[0138] Input module, used to collect risk classification and control evaluation indicators of the pipeline to be evaluated;

[0139] The calculation and evaluation module is used to calculate the comprehensive score of the pipeline's designated evaluation indicators based on the collected risk classification and control evaluation indicators of the pipeline to be evaluated, and determine the risk prevention and control operation steps to be executed based on the grade classification of the score results;

[0140] The output module optimizes and outputs the description of the risk prevention and control operation steps performed based on the specific evaluation scores of the risk classification and control evaluation indicators.

[0141] In another aspect, the present invention further discloses a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the above method.

[0142] In another embodiment provided in the present application, a computer program product comprising instructions is also provided, which, when executed on a computer, enables the computer to execute any of the methods for evaluating pipeline occupation and surrounding environment risk levels in the above embodiments.

[0143] It is understandable that the system provided by the embodiment of the present invention corresponds to the method provided by the embodiment of the present invention, and the explanation, examples and beneficial effects of the relevant contents can refer to the corresponding parts of the above method.

[0144] The embodiment of the present application further provides an electronic device, comprising a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus.

[0145] Memory for storing computer programs;

[0146] The processor is used to implement the above-mentioned evaluation method for pipeline occupation and surrounding environment risk level when executing the program stored in the memory.

[0147] The communication bus mentioned in the above electronic device can be a peripheral component interconnect standard bus or an extended industry standard architecture bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc.

[0148] The communication interface is used for communication between the above electronic device and other devices.

[0149] The memory may include a random access memory, or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0150] The above-mentioned processor can be a general-purpose processor, including a central processing unit, a network processor, etc.; it can also be a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component.

[0151] It should also be noted that electronic devices also include terminal devices, which can also be called terminals, user equipment, mobile stations, mobile terminals, etc. Terminal devices can be mobile phones, smart TVs, wearable devices, tablet computers, computers with wireless transceiver functions, virtual reality terminal devices, augmented reality terminal devices, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in remote surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc. The embodiments of this application do not limit the specific technology and specific device form used by the terminal devices.

[0152] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of 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, the process or function described in the embodiment of the present application is generated in whole or in part. 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 computer-readable storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium, or a semiconductor medium (e.g., a solid-state hard disk).

[0153] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0154] In addition, it should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0155] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, in the embodiments of the present invention, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A method for evaluating pipeline occupation and surrounding environment risk levels, characterized in that: The specific steps are as follows: S1. Collect three types of risk classification and control evaluation indicators for the pipeline to be evaluated, including pipeline occupation, pipeline surrounding environment, and pipeline basic management, and score the results P based on M risk classification and control evaluation indicators. i Calculate the comprehensive score Q of the specified evaluation index of the pipeline. The calculation formula is: S2. Set risk level classification, and perform corresponding risk prevention and control operations based on the weighted comprehensive score results of the pipeline's designated evaluation indicators.

2. The method for evaluating pipeline occupation and surrounding environment risk level according to claim 1, characterized in that: During the operation of step S2, the risk level of pipeline occupation and surrounding environment is determined according to the weighted comprehensive score of the pipeline designated evaluation index, and the corresponding risk prevention and control operations are performed according to the evaluation results refined according to the pipeline designated evaluation index.

3. The method for evaluating pipeline occupation and surrounding environment risk level according to claim 2, characterized in that: The risk level in step S2 is divided into four levels, and the comprehensive scores Q combined with the pipeline specified evaluation indicators are: If Q ≥ the preset value a, the pipeline is assessed as risk level 1 and at least the following risk prevention and control actions are implemented: regular drills of emergency plans, increased inspection frequency of the affected pipeline sections, third-party inspections of the affected pipeline sections within a specified time period, third-party risk assessments of the affected pipeline sections within a specified time period, the installation of warning signs, installation and maintenance of remote monitoring devices, notification of risks to the surrounding areas, and strengthening of thermal pipeline equipment management; If the preset value a>Q≥preset value b, the pipeline is assessed as a Level 2 risk and at least the following risk prevention and control actions are performed: increase the inspection frequency of the involved pipeline sections, install and maintain remote monitoring devices, record the liquid level and temperature data of the involved pipelines daily, inform the surrounding areas of the risks, take photos of the risks in the pipeline surrounding environment during inspections and update the records in a timely manner, strengthen the basic management of thermal pipeline equipment, and set up warning signs; If the preset value b > Q ≥ the preset value c, the pipeline is assessed as a Level 3 risk and at least the following risk prevention and control actions are performed: increase the inspection frequency of the involved pipeline sections, install and maintain remote monitoring devices, record the liquid level and temperature data of the involved pipelines daily, inform the surrounding areas of the risks, take photos of the risks in the pipeline surrounding environment during inspections and update the records in a timely manner, and strengthen the basic management of thermal pipeline equipment; Q<preset value c, the pipeline assessment is set to level 4 risk, and at least the following risk prevention and control operations are performed: take photos of the risks in the surrounding environment of the pipeline during inspections and update the records in a timely manner, and strengthen the basic management of thermal pipeline equipment.

4. The method for evaluating pipeline occupation and surrounding environment risk level according to claim 3, characterized in that: The pipeline occupation risk classification control evaluation index is set to determine whether the pipeline occupation length is greater than or equal to 50 meters; If the pipeline occupied length is greater than or equal to 50 meters, the evaluation is 1 point; if the pipeline occupied length is less than 50 meters, the evaluation is 0 point.

5. The method for evaluating pipeline occupation and surrounding environment risk level according to claim 3, characterized in that: The risk classification and control evaluation indicators for the pipeline surrounding environment include any one or any combination of the following: Determine whether there is a building directly above the pipeline: if there is a building directly above the pipeline, the score is 2; if not, the score is 0; Determine whether the pipeline passes through a public activity place where more than 50 people gather at the same time. If so, the score is 10 points; if not, the score is 0 points. Determine whether there is an underground passage or low-lying road section within 5 meters of the pipeline. If there is an underground passage or low-lying road section within 5 meters of the pipeline, the evaluation is 2 points; if not, the evaluation is 0 points; Determine whether there is a culvert under a bridge within 5 meters of the pipeline. If there is a culvert under a bridge within 5 meters of the pipeline, the evaluation is 2 points; if not, the evaluation is 0 points; Determine whether there is a basement or semi-basement within 5 meters of the pipeline. If there is a basement or semi-basement within 5 meters of the pipeline, the evaluation is 9 points; if not, the evaluation is 0 points; Determine whether there is an underground shopping mall or garage within 5 meters of the pipeline. If there is an underground shopping mall or garage within 5 meters of the pipeline, the evaluation is 4 points; if not, the evaluation is 0 points; Determine whether the pipeline needs to enter the closed management area for maintenance and inspection. If it is necessary to enter the closed management area for maintenance and inspection, the evaluation is 3 points; if not, the evaluation is 0 points; Determine whether there is a structure directly above the pipeline. If there is a structure directly above the pipeline, the score is 1; if not, the score is 0.

6. The method for evaluating pipeline occupation and surrounding environment risk level according to claim 5, characterized in that: In the process of executing the corresponding risk prevention and control operations in step S2, the risk prevention and control operations are optimized based on the pipeline surrounding environment risk classification management and control evaluation indicators, including: If the evaluation score is 0 when judging whether the pipeline passes through a public activity place where more than 50 people gather at the same time, and the evaluation score is also 0 when judging whether there is a basement or semi-basement within 5 meters of the pipeline, the inspection frequency will not be increased when increasing the inspection frequency of the pipe section involved. Otherwise, one inspection will be added on top of the normal inspection. When determining whether the pipeline needs to enter a closed management area for maintenance and inspection, if the evaluation score is 0, then one inspection will be added to the normal inspection frequency in the process of increasing the inspection frequency of the pipeline section area; if the evaluation score is 3, then the risk situation will be informed to the surrounding units every year during the risk notification process, and remote monitoring devices must be installed and maintained.

7. The method for evaluating pipeline occupation and surrounding environment risk level according to claim 3, characterized in that: The pipeline infrastructure management risk classification control evaluation indicators include any one or any combination of the following: Determine whether the pipeline is laid in direct burial, trench, or overhead. If it is laid in direct burial, the evaluation is 2 points; if it is laid overhead, the evaluation is 1 point; if it is laid in trench, the evaluation is 0 points; Determine whether the nominal diameter of the pipe is greater than or equal to the specified size. If the nominal diameter is greater than or equal to the specified size, the evaluation is 1 point; if the nominal diameter is less than the specified size, the evaluation is 0 point. Determine whether the medium in the pipeline is steam or hot water. If the medium in the pipeline is steam, the evaluation is 2 points; if the medium in the pipeline is hot water, the evaluation is 1 point; Determine whether the corrosion depth of the pipe wall exceeds 1 / 3 of the original wall thickness. If the corrosion depth exceeds 1 / 3 of the original wall thickness, the evaluation is 5 points; if not, the evaluation is 0 points; Determine whether the pipeline has been in use for more than the specified number of years. If the pipeline has been in use for more than the specified number of years, the score is 1; if the pipeline has been in use for less than or equal to the specified number of years, the score is 0. Determine whether the pipeline has undergone three emergency repairs within a year, one emergency repair within three years, or no emergency repair within three years. If three emergency repairs have occurred within a year, the evaluation is 8 points; if one emergency repair has occurred within three years, the evaluation is 5 points; if no emergency repair has occurred within three years, the evaluation is 0 points.

8. The method for evaluating pipeline occupation and surrounding environment risk level according to claim 7, characterized in that: In the process of executing the corresponding risk prevention and control operations in step S2, the risk prevention and control operations are optimized based on the pipeline basic management risk classification control evaluation indicators, including: In determining whether the corrosion depth of the pipeline wall exceeds 1 / 3 of the original wall thickness, if the evaluation score is 5 points, the inspection operation will be carried out every year when the third party inspects the involved pipe section. If the evaluation score is 0 points, the inspection operation will be carried out every 3 years when the third party inspects the involved pipe section. In determining whether the pipeline has been in service for more than the specified number of years, if the evaluation score is 1, the third party will conduct an inspection every year when conducting a risk assessment on the pipeline section involved; if the evaluation score is 0, the inspection will be conducted every three years when conducting a risk assessment on the pipeline section involved; In determining whether a pipeline has undergone three emergency repairs within a year, one emergency repair within three years, or no emergency repair within three years, if the evaluation score is 8 points, an emergency drill will be conducted for the pipeline section involved every month when the emergency plan is regularly practiced; if the evaluation score is 5 points, an emergency drill will be conducted for the pipeline section involved every quarter when the emergency plan is regularly practiced; if the evaluation score is 0 points, an emergency drill will be conducted for the pipeline section involved every year when the emergency plan is regularly practiced.

9. The method for evaluating pipeline occupation and surrounding environment risk level according to claim 3, wherein: The preset value a, preset value b, and preset value c are all determined based on the collected specified risk classification control evaluation indicators, including: The preset value a is the sum of the scores for determining whether the pipeline passes through a public activity venue where more than 50 people gather at the same time, whether there is a basement or semi-basement within 5 meters of the pipeline, whether there is an underground shopping mall or garage within 5 meters of the pipeline, and whether the pipeline has undergone three emergency repairs within a year, one emergency repair within three years, or no emergency repair within three years. The preset value b is the sum of the evaluation scores for determining whether the pipeline passes through a public activity venue where more than 50 people gather at the same time and the evaluation scores for determining whether there is a basement or semi-basement within 5 meters of the pipeline. The preset value c is the average value of the preset value a for different types of indicators.

10. A device for evaluating pipeline occupation and surrounding environment risk levels, wherein a computer program is stored therein, and when the computer program is executed by a processor, the device is used to execute the method for evaluating pipeline occupation and surrounding environment risk levels according to any one of claims 1 to 9, characterized in that: include: Input module, used to collect risk classification and control evaluation indicators of the pipeline to be evaluated; The calculation and evaluation module is used to calculate the comprehensive score of the pipeline's designated evaluation indicators based on the collected risk classification and control evaluation indicators of the pipeline to be evaluated, and determine the risk prevention and control operation steps to be executed based on the grade classification of the score results; The output module optimizes and outputs the description of the risk prevention and control operation steps performed based on the specific evaluation scores of the risk classification and control evaluation indicators.

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