CN116663910A - Cable bridge fire risk analysis method and system - Google Patents
Cable bridge fire risk analysis method and system Download PDFInfo
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Abstract
The invention discloses a fire risk analysis method and a fire risk analysis system for a cable bridge, and relates to the technical field of cable bridges. The system aims to solve the problems that the existing system cannot timely evaluate and predict risks when no fire occurs, so that fire burst occurs, emergency rescue efficiency is affected, and further, the extinguishing time is delayed, and fire loss is aggravated; a fire risk analysis method for a cable bridge comprises the following steps: pre-analyzing fire risks; analyzing the fire source environment; setting a fire-fighting scheme; fire risk pre-analysis is timely carried out on the obtained cable bridge basic data, the cable bridge is monitored, fire hidden danger and fire risk existing in the cable bridge are judged, the influence range and the influence level of each fire are determined according to deduction results, the degree of the fire hidden danger and the fire risk is estimated, and the degree of the fire hidden danger and the fire risk is prevented and eliminated in advance, meanwhile, the cable and the bridge are correspondingly adjusted and maintained, the fire hidden danger and the fire risk are timely reduced to the minimum, and the fire occurrence rate is greatly reduced.
Description
Technical Field
The invention relates to the technical field of cable bridges, in particular to a fire risk analysis method and a fire risk analysis system for a cable bridge.
Background
As a protection measure for the cable bridge in the electric comprehensive wiring industry in recent years, the cable bridge is increasingly favored by engineering operators, and is more applied to industrial plants, commercial buildings and communication power systems.
In the actual engineering use process, the load of the cable is increased due to the increase of the user terminal electric appliances, and particularly, the load generated when the terminal electric appliances are started simultaneously and instantaneously brings strong load impact to the cable, thereby causing cable fire accidents in the narrow space of the cable bridge.
Related patents exist for cable bridge fires; for example, chinese patent publication No. CN104951627B discloses a fire risk analysis method and system for a transverse multi-layer cable bridge of a nuclear power plant, the method comprising the steps of: acquiring the characteristic information of a fire disaster initial fire source of a transverse multi-layer cable bridge of a nuclear power plant; acquiring the real-time heat release rate of each layer of cable bridge in the fire disaster process according to the characteristic information of an initial fire source, the geometric structure parameters of the transverse multi-layer cable bridge, the longitudinal spreading rate of the cable flame and the characteristic parameters of the cable materials; acquiring fire risk characteristic parameters in a limited space according to the initial fire source characteristic information and the real-time heat release rate of each layer of cable bridge; and comparing the fire risk characteristic parameters with the quantitative indexes, and judging the risk of the fire of the transverse multi-layer cable bridge of the nuclear power plant. The method and the device follow the conservation principle of the nuclear power plant, fully consider the difference between the single cable bridges in the transverse multi-layer cable bridge, have higher analysis accuracy, can more reasonably analyze the fire risk of the transverse multi-layer cable bridge of the nuclear power plant, and provide favorable support for the fireproof design of the cable bridge.
Although the above patent reasonably analyzes the fire risk of the transverse multi-layer cable bridge, the following problems still exist in the actual use process:
1. when the cable bridge is installed, the bending radius of the cable in the bridge is too small, and the construction drawing is inconsistent with the actual construction, so that the insulation is subjected to fatigue damage, electric leakage and short circuit fire are caused, and the occurrence frequency of fire is greatly improved;
2. the existing system can not timely evaluate and predict the risk when no fire occurs, so that fire burst is caused, emergency rescue efficiency is affected, and further the extinguishing time is delayed, so that fire loss is aggravated;
3. because most of the commonly used insulating sleeves of the cable are polymers, a large amount of smoke can be generated during combustion, toxic gas can be generated under the high-temperature condition, the toxic gas is harmful to human bodies, and smoke dust and toxic mist greatly reduce the visibility of a fire scene, so that rescue and safe evacuation of rescue workers are affected.
Disclosure of Invention
The invention aims to provide a fire risk analysis method and a fire risk analysis system for a cable bridge, which are used for timely analyzing the fire risk, evaluating the hidden danger and the degree of the fire risk, timely reducing the hidden danger and the fire risk to the minimum, and greatly reducing the fire occurrence rate so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a fire risk analysis method for a cable bridge comprises the following steps:
fire risk pre-analysis:
acquiring basic data of a cable bridge, wherein the basic data comprise construction drawing data of the cable bridge, field measurement data of an uploaded cable bridge and multi-view images of the uploaded cable bridge, and establishing a three-dimensional model of the cable bridge based on the basic data;
acquiring a cable category in the cable bridge, acquiring the running state and the running time of the cable, identifying main risk factors related to the cable bridge based on the cable category, judging whether the cable bridge has danger based on the main risk factors, and identifying;
judging the recognized risk category and risk level, identifying the generation reason based on the risk category, deducing in the three-dimensional model based on the risk level, and predicting the influence range and the influence size on the cable bridge;
the dangerous categories comprise safety, criticality, danger and disastrous, the dangerous grades comprise a first grade, a second grade, a third grade and a fourth grade, and the dangerous categories are in one-to-one correspondence with the dangerous grades;
the risk level classification process comprises the following steps:
acquiring a risk assessment element corresponding to the risk level; wherein the hazard assessment element comprises an initial fire source position and an initial fire source area;
acquiring the linear distance between the initial fire source positions and the nearest cable according to the initial fire source positions, and taking the linear distance between the initial fire source positions and the nearest cable as first data;
acquiring a linear distance between the center positions of the initial fire source areas and the nearest cables according to the initial fire source areas, and taking the linear distance between the center positions of the initial fire source areas and the nearest cables as second data;
the risk level classification process further includes:
acquiring a risk evaluation score by using the first data and the second data, wherein the risk evaluation score is acquired by the following formula:
wherein W represents a risk evaluation score; w (W) 01 And W is 02 Respectively representing basic evaluation scores corresponding to preset first data and second data; l represents the linear distance between the initial fire source positions and the nearest cable; l (L) 0 Representing a distance threshold value corresponding to a preset linear distance between initial fire source positions and the nearest cable; l (L) 1 Representing the initial fire source area to obtain the linear distance between the center positions of the initial fire source area and the nearest cable; l (L) q A center position representing the initial fire source area is spaced apart from the fire sourceMaximum linear distance of area boundary line; l (L) z A linear cluster between center points of standard geometric figures which represent that the center positions of the initial fire source areas are away from the equivalent fire source areas;
obtaining a straight line distance between the center position of the initial fire source area and the nearest cable according to the initial fire source area, wherein the straight line distance comprises the following steps:
acquiring the initial fire source position and the area range formed by the fire source area;
according to the shape formed by the boundary of the area range, the area range is equivalent to the standard geometric figure closest to the shape formed by the boundary;
acquiring the center position of the standard geometric figure and the fire point position corresponding to the fire source, and acquiring the linear distance between the center position of the standard geometric figure and the fire point position corresponding to the fire source according to the center position of the standard geometric figure and the fire point position corresponding to the fire source;
selecting a position, which is 0.35-0.41 times of the linear distance and is close to the direction of the position of the ignition point, of the linear distance as the center position of the initial fire source area;
acquiring a boundary line of the nearest cable, which is close to the central position, and acquiring the shortest linear distance between the central position and the boundary line; the shortest linear distance is the linear distance between the center position of the initial fire source area and the nearest cable;
fire source environment analysis:
acquiring initial fire source position data of the cable bridge fire disaster, and simultaneously acquiring initial fire source characteristic information, wherein the initial fire source characteristic information comprises the area of an initial fire source and the ignition source of the initial fire source;
acquiring surrounding environment data of an initial fire source of the cable bridge fire, and judging fire risk level based on the surrounding environment data, the characteristic information of the initial fire source and characteristic parameters of cable materials;
comparing the fire risk level with a predicted risk level, and judging the risk of the fire of the cable bridge and the influence range of the fire of the cable bridge;
and (3) making a fire-fighting scheme:
formulating safety countermeasure measures for preventing accidents based on the fire risk pre-analysis, and formulating an emergency rescue scheme based on the risk of the cable bridge fire and the influence range and the size of the cable bridge;
and acquiring the implementation progress of the safety countermeasure measures and the implementation progress of the emergency rescue scheme, wherein the three-party fire-fighting linkage data in the emergency rescue scheme are extracted, and the fire-fighting linkage control scheduling is performed based on a three-party scheduling platform.
Further, the initial fire source position data of the cable bridge fire is obtained, meanwhile, the basic data of the cable bridge is obtained, and the fireproof distance of the cable bridge in the basic data is extracted.
Further, making safety countermeasure measures for preventing accidents and making emergency rescue schemes, and further comprising:
the established security countermeasure measures are prioritized for the determined risk, nuisance factors, ordered in hazard levels based on the determined hazard levels of the risk, nuisance factors, and processed based on the ordering and ordering.
Further, when the risk evaluation score is lower than a first preset threshold, determining that the risk level is one-level; when the risk evaluation score is not lower than a first preset threshold value but lower than a second preset threshold value, judging that the risk grade is two-grade; when the risk evaluation score is not lower than a second preset threshold value but lower than a third preset threshold value, judging that the risk grade is three-grade; and when the risk evaluation score is not lower than a third preset threshold value, judging that the risk grade is four.
Further, after the cable bridge is determined to have a fire disaster, whether personnel casualties exist or not is determined preferentially, and on-site medical rescue measures are carried out according to the degree of the personnel casualties or necessary rescue measures are taken and then the cable bridge is sent to a hospital for treatment.
Further, after implementing the rescue scheme and extinguishing the fire, immediately organizing the accident scene to isolate and protect, organizing the accident equipment to check, confirming the damage degree of the cable, carrying out emergency repair on the accident cable to restore production, and meanwhile, formulating precautionary measures based on investigation analysis results of the accident.
The invention provides another technical scheme, a cable bridge fire risk analysis system, comprising:
the fire monitoring platform is used for acquiring basic data of the cable bridge, constructing a three-dimensional model for fire risk deduction based on the basic data, updating the three-dimensional model for fire risk deduction in real time, simulating and deducting buildings and figures in the environment based on deduction results, and matching corresponding safety countermeasure measures based on deduction results;
and the scheduling platform is used for acquiring the safety countermeasure measures, extracting the priority levels in the safety countermeasure measures, scheduling the fire-fighting equipment for each safety countermeasure measure based on the priority levels, and feeding back data after the safety countermeasure measures are completed.
Further, the fire monitoring platform is further used for acquiring initial fire source data of the cable bridge fire, inputting the initial fire source data of the cable bridge fire into a three-dimensional model for deduction budget, and matching corresponding emergency rescue schemes based on deduction results;
the scheduling platform is also used for acquiring the emergency rescue scheme, extracting emergency scheduling equipment in the emergency rescue scheme, and simultaneously extracting a scheduling order in the emergency rescue scheme; the emergency equipment comprises an emergency command terminal, an emergency first-aid vehicle, emergency rescue personnel and emergency rescue materials.
Further, the fire monitoring platform includes:
the model making unit is used for acquiring three-dimensional coordinate data in the cable bridge construction drawing actively uploaded by the system, inputting the three-dimensional coordinate data into the three-dimensional model for preliminary construction, acquiring actual three-dimensional coordinate data of the cable bridge actively uploaded by the system, and further fusing and splicing the actual three-dimensional coordinate data with the preliminarily constructed three-dimensional model;
the digital deduction unit is used for determining the cable type in the cable bridge, judging the overload and overheat cause of the cable based on the cable type, deducting the cable result in the current state in real time, displaying the deduction result in real time and carrying out early warning;
the risk assessment unit is used for judging damage to the building and the human body based on the deduction result and combining with the current environmental factors, and determining a risk assessment level;
the scheme making unit is used for making a fire-fighting scheme based on the fire cause, grading the fire-fighting scheme under the same fire cause, and making corresponding fire-fighting equipment quantity requirements based on priority;
the scheme making unit is further used for carrying out one-to-one correspondence with the fire-fighting schemes based on the risk assessment grades and carrying out data intercommunication with the dispatching platform based on the fire-fighting schemes.
Further, the scheduling platform includes:
the data acquisition module is used for acquiring the fire-fighting scheme, extracting emergency first-aid vehicles, emergency rescue workers and emergency rescue materials in the fire-fighting scheme based on data types, and simultaneously acquiring the required quantity of the emergency first-aid vehicles, the emergency rescue workers and the emergency rescue materials;
acquiring the quantity data feedback of the current corresponding emergency first-aid vehicles, emergency rescue workers and the required equipment of the emergency rescue materials from the third-party dispatching equipment, and negotiating and calling the emergency equipment of other third-party dispatching equipment from the third-party dispatching equipment if the quantity is not consistent;
and the data feedback module is used for feeding back the fire-fighting progress and the fire-fighting result to the fire monitoring platform in real time, feeding back fire-fighting summary based on the fire-fighting result, analyzing accidents and establishing a table.
Compared with the prior art, the invention has the beneficial effects that:
1. the fire risk analysis is timely carried out on the obtained cable bridge basic data, the cable bridge is monitored, fire hazards and fire risks existing in the cable bridge are judged, the degree of the fire hazards and the degree of the fire risks are evaluated, the cable and the bridge are correspondingly adjusted and maintained, the fire hazards and the fire risks are minimized in time, the fire occurrence rate is greatly reduced, the fire source environment analysis is effectively carried out on analysis and deduction aiming at determined dangerous and harmful factors, whether the current fire condition is in a controllable range is judged, the influence range and the influence level of each fire are determined according to the deduction result, different emergency rescue schemes and needed emergency rescue equipment thereof are screened according to the danger level of a disaster-affected node by the fire control scheme, and therefore the efficiency and accuracy of quick deduction of corresponding emergency rescue scheduling are improved, the waste and the loss of rescue materials are reasonably utilized.
2. The fire monitoring platform is adopted for remote monitoring, meanwhile, potential safety hazards are found and warned in time in the monitoring process, the occurrence times of fire are reduced, the fire influence range is reduced, the establishment of the three-dimensional model effectively improves the authenticity of the deduction process, visual deduction process display and result display are provided, the deduction result is supported for playback of a composite disc and deduction track display, dynamic analysis and display are carried out through different visual angles, reliable data information is effectively provided for management staff, the safety of a cable bridge frame is ensured, the scheduling platform is matched with the fire monitoring platform for equipment scheduling, and implementation of an emergency rescue scheme is ensured.
Drawings
FIG. 1 is a flow chart of a method for analyzing fire risk of a cable bridge;
fig. 2 is a block diagram of the cable bridge fire risk analysis system according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the technical problem that the existing system cannot timely predict risk assessment when no fire occurs, which causes fire emergency, affects emergency rescue efficiency, delays the rescue time and aggravates fire loss, referring to fig. 1, the embodiment provides the following technical scheme:
a fire risk analysis method for a cable bridge comprises the following steps:
fire risk pre-analysis: acquiring basic data of a cable bridge, wherein the basic data comprise construction drawing data of the cable bridge, field measurement data of an uploaded cable bridge and multi-view images of the uploaded cable bridge, and establishing a three-dimensional model of the cable bridge based on the basic data; acquiring a cable category in the cable bridge, acquiring the running state and the running time of the cable, identifying main risk factors related to the cable bridge based on the cable category, judging whether the cable bridge has danger based on the main risk factors, and identifying; judging the recognized risk category and risk level, identifying the generation reason based on the risk category, deducing in the three-dimensional model based on the risk level, and predicting the influence range and the influence size on the cable bridge; the dangerous classes comprise safety, criticality, danger and disastrous, the dangerous grades comprise a first grade, a second grade, a third grade and a fourth grade, and the dangerous classes are in one-to-one correspondence with the dangerous grades;
fire source environment analysis: acquiring initial fire source position data of the cable bridge fire disaster, and simultaneously acquiring initial fire source characteristic information, wherein the initial fire source characteristic information comprises the area of an initial fire source and the ignition source of the initial fire source; acquiring surrounding environment data of an initial fire source of the cable bridge fire, and judging fire risk level based on the surrounding environment data, the characteristic information of the initial fire source and characteristic parameters of cable materials; comparing the fire risk level with a predicted risk level, and judging the risk of the fire of the cable bridge and the influence range of the fire of the cable bridge; acquiring the initial fire source position data of the cable bridge fire disaster, simultaneously acquiring the basic data of the cable bridge, and extracting the fireproof interval of the cable bridge in the basic data;
and (3) making a fire-fighting scheme: formulating safety countermeasure measures for preventing accidents based on the fire risk pre-analysis, and formulating an emergency rescue scheme based on the risk of the cable bridge fire and the influence range and the size of the cable bridge; acquiring the implementation progress of the safety countermeasure measures and the implementation progress of the emergency rescue scheme, wherein three-party fire-fighting linkage data in the emergency rescue scheme are extracted, and fire-fighting linkage control scheduling is performed based on a three-party scheduling platform;
making safety countermeasure measures for preventing accidents and making emergency rescue schemes, and further comprising: prioritizing the formulated safety countermeasure measures for the determined risk and nuisance factors, sequencing the hazard classes based on the determined hazard classes of the risk and nuisance factors, and processing based on the sequencing and sequencing;
after the cable bridge is determined to have a fire disaster, whether personnel casualties exist or not is determined preferentially, on-site medical rescue measures are carried out according to the degree of personnel injury or necessary rescue measures are taken and then the personnel are sent to a hospital for treatment, after a rescue scheme is implemented and fire is extinguished, accident site personal isolation and protection are immediately carried out by organizations, accident equipment inspection is made by the organizations, the damage degree of the cable is confirmed, accident cable rush repair is carried out to recover production, and meanwhile precautionary measures are made based on investigation analysis results of the accident.
Specifically, fire risk pre-analysis is timely carried out on the obtained cable bridge base data, the cable bridge is monitored, fire hidden danger and fire risk existing in the cable bridge are judged, the degree of the fire hidden danger and the degree of the fire risk are evaluated, influences on surrounding buildings and human bodies are analyzed according to the existing dangerous and harmful factors, possible types of accidents are analyzed, and are prevented and eliminated in advance, meanwhile, the cable and the bridge are correspondingly regulated and maintained, the fire hidden danger and the fire risk are timely reduced to the minimum, the fire occurrence rate is greatly reduced, fire source environment analysis is effectively carried out on the determined dangerous and harmful factors in an analysis mode, whether the current fire condition is in a controllable range or not is judged, the influence range and the influence grade of each fire are determined according to the deduction result, different emergency rescue schemes and emergency rescue equipment required by the fire scheme are screened according to the dangerous grade of the affected node, accordingly, the efficiency and accuracy of carrying out quick deduction according to the emergency rescue schedule are improved, the rescue materials are reasonably utilized, and the waste and the loss of the materials are avoided.
In one embodiment of the present invention, the risk level classification process includes:
acquiring a risk assessment element corresponding to the risk level; wherein the hazard assessment element comprises an initial fire source position and an initial fire source area;
acquiring the linear distance between the initial fire source positions and the nearest cable according to the initial fire source positions, and taking the linear distance between the initial fire source positions and the nearest cable as first data;
acquiring a linear distance between the center positions of the initial fire source areas and the nearest cables according to the initial fire source areas, and taking the linear distance between the center positions of the initial fire source areas and the nearest cables as second data;
acquiring a risk evaluation score by using the first data and the second data, wherein the risk evaluation score is acquired by the following formula:
wherein W represents a risk evaluation score; w (W) 01 And W is 02 Respectively representing basic evaluation scores corresponding to preset first data and second data; l represents the linear distance between the initial fire source positions and the nearest cable; l (L) 0 Representing a distance threshold value corresponding to a preset linear distance between initial fire source positions and the nearest cable; l (L) 1 Representing the initial fire source area to obtain the linear distance between the center positions of the initial fire source area and the nearest cable; l (L) q A maximum linear distance representing a center position of the initial fire source area from the fire source area boundary line; l (L) z Representation houseThe center positions of the initial fire source areas are separated from the linear clusters among the center points of the standard geometric figures equivalent to the fire source areas;
when the risk evaluation score is lower than a first preset threshold value, judging that the risk grade is one-level; when the risk evaluation score is not lower than a first preset threshold value but lower than a second preset threshold value, judging that the risk grade is two-grade; when the risk evaluation score is not lower than a second preset threshold value but lower than a third preset threshold value, judging that the risk grade is three-grade; and when the risk evaluation score is not lower than a third preset threshold value, judging that the risk grade is four.
Meanwhile, acquiring the linear distance between the center positions of the initial fire source areas and the nearest cables according to the initial fire source areas, wherein the linear distance comprises the following steps:
acquiring the initial fire source position and the area range formed by the fire source area;
according to the shape formed by the boundary of the area range, the area range is equivalent to the standard geometric figure closest to the shape formed by the boundary;
acquiring the center position of the standard geometric figure and the fire point position corresponding to the fire source, and acquiring the linear distance between the center position of the standard geometric figure and the fire point position corresponding to the fire source according to the center position of the standard geometric figure and the fire point position corresponding to the fire source;
selecting a position, which is 0.35-0.41 times of the linear distance and is close to the direction of the position of the ignition point, of the linear distance as the center position of the initial fire source area;
acquiring a boundary line of the nearest cable, which is close to the central position, and acquiring the shortest linear distance between the central position and the boundary line; the shortest straight line distance is the straight line distance between the center position of the initial fire source area and the nearest cable.
Through the setting of the dangerous evaluation mathematical model, the accuracy of dangerous level division and the rationality between dangerous level division setting and actual fire source conditions can be effectively improved, and the problem of increasing the error rate caused by artificial judgment of dangerous levels is prevented. Meanwhile, the method for setting the central position can further improve the rationality of the identification of the central position and the setting matching property of the central position with the actual condition of the area of the fire source under the condition that the area range formed by the initial fire source is irregular, and meanwhile, the method for setting the central position further improves the accuracy and rationality of the subsequent dangerous level division.
In order to better implement a fire risk analysis method for a cable bridge, please refer to fig. 2, the invention provides a fire risk analysis system for a cable bridge, comprising:
the fire monitoring platform is used for acquiring basic data of the cable bridge, constructing a three-dimensional model for fire risk deduction based on the basic data, updating the three-dimensional model for fire risk deduction in real time, simulating and deducting buildings and figures in the environment based on deduction results, and matching corresponding safety countermeasure measures based on deduction results; the scheduling platform is used for acquiring the safety countermeasure measures, extracting the priority levels in the safety countermeasure measures, scheduling the fire-fighting equipment for each safety countermeasure measure based on the priority levels, and feeding back data after the safety countermeasure measures are completed;
the fire monitoring platform is also used for acquiring cable bridge fire initial fire source data, inputting the cable bridge fire initial fire source data into a three-dimensional model for deduction and budget, and matching corresponding emergency rescue schemes based on deduction results; the scheduling platform is also used for acquiring the emergency rescue scheme, extracting emergency scheduling equipment in the emergency rescue scheme, and simultaneously extracting a scheduling order in the emergency rescue scheme; the emergency equipment comprises an emergency command terminal, an emergency first-aid vehicle, emergency rescue personnel and emergency rescue materials.
Specifically, because most of the insulation sleeves commonly used for the cables are polymers, a large amount of smoke can be generated during combustion, toxic gas can be generated under the high-temperature condition, toxicity is caused to human bodies, and smoke dust and toxic mist greatly reduce the visibility of a fire scene, and rescue and safe evacuation of rescue workers are affected, so that a fire monitoring platform is adopted for remote monitoring, meanwhile, potential safety hazards and alarms are timely found in the monitoring process, the number of times of fire occurrence is reduced, the fire influence range is reduced, the authenticity of the deduction process is effectively improved through the establishment of a three-dimensional model, visual deduction process display and result display are provided, playback of a multiple disc and deduction track display are supported, deduction results are displayed through dynamic analysis through different visual angles, reliable data information is effectively provided for management workers, the safety of a cable bridge is ensured, and the scheduling platform is matched with the fire monitoring platform for equipment scheduling, so that the implementation of an emergency rescue scheme is ensured.
In order to solve the technical problems that when a cable bridge is installed, the bending radius of a cable in the bridge is too small, a construction drawing is inconsistent with actual construction, so that fatigue damage occurs in insulation, electric leakage and short circuit are caused, fire occurrence frequency is greatly improved, and referring to fig. 2, the embodiment provides the following technical scheme:
fire monitoring platform includes: the model making unit is used for acquiring three-dimensional coordinate data in the cable bridge construction drawing actively uploaded by the system, inputting the three-dimensional coordinate data into the three-dimensional model for preliminary construction, acquiring actual three-dimensional coordinate data of the cable bridge actively uploaded by the system, and further fusing and splicing the actual three-dimensional coordinate data with the preliminarily constructed three-dimensional model; the digital deduction unit is used for determining the cable type in the cable bridge, judging the overload and overheat cause of the cable based on the cable type, deducting the cable result in the current state in real time, displaying the deduction result in real time and carrying out early warning; the risk assessment unit is used for judging damage to the building and the human body based on the deduction result and combining with the current environmental factors, and determining a risk assessment level; the scheme making unit is used for making a fire-fighting scheme based on the fire cause, grading the fire-fighting scheme under the same fire cause, and making corresponding fire-fighting equipment quantity requirements based on priority; the scheme making unit is further used for carrying out one-to-one correspondence with the fire-fighting schemes based on the risk assessment grades and carrying out data intercommunication with the dispatching platform based on the fire-fighting schemes.
Specifically, coordinate data of an actual cable bridge is obtained by establishing a three-dimensional model, consistency of construction drawings and actual construction is guaranteed, flame propagation caused by too close distance between bridges due to construction errors is avoided, cable types in the cable bridge are determined, cable overload and overheat causes are judged based on the cable types, cable results in the current state are deduced in real time, the deduced results are displayed in real time and early-warned, fireproof effects of the cable bridge are effectively improved, firing ranges are reduced, heat loss of surrounding equipment and devices is reduced, thermal hazard of fire is reduced, fire-fighting schemes are classified based on risk grades, pertinence is strong, and rescue efficiency and rescue equipment utilization rate are improved.
In order to solve the technical problem that the influence degree and the influence range of fire disaster cannot be accurately judged, which results in insufficient or waste of rescue materials and rescue workers, referring to fig. 2, the embodiment provides the following technical scheme:
a dispatch platform, comprising: the data acquisition module is used for acquiring the fire-fighting scheme, extracting emergency first-aid vehicles, emergency rescue workers and emergency rescue materials in the fire-fighting scheme based on data types, and simultaneously acquiring the required quantity of the emergency first-aid vehicles, the emergency rescue workers and the emergency rescue materials; acquiring the quantity data feedback of the current corresponding emergency first-aid vehicles, emergency rescue workers and the required equipment of the emergency rescue materials from the third-party dispatching equipment, and negotiating and calling the emergency equipment of other third-party dispatching equipment from the third-party dispatching equipment if the quantity is not consistent; and the data feedback module is used for feeding back the fire-fighting progress and the fire-fighting result to the fire monitoring platform in real time, feeding back fire-fighting summary based on the fire-fighting result, analyzing accidents and establishing a table.
Specifically, by determining the number of requirements of emergency ambulance, emergency rescue personnel and emergency rescue materials in the fire-fighting scheme and distributing the requirements of equipment required by each scheduling scheme according to the priority, the utilization efficiency of rescue resources can be greatly improved, scientific and ordered management of different fire areas is realized, and the rescue efficiency is greatly improved according to the influence degree and influence range reasonable distribution of the fire.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (10)
1. A fire risk analysis method for a cable bridge is characterized by comprising the following steps of: the method comprises the following steps:
fire risk pre-analysis:
acquiring basic data of a cable bridge, wherein the basic data comprise construction drawing data of the cable bridge, field measurement data of an uploaded cable bridge and multi-view images of the uploaded cable bridge, and establishing a three-dimensional model of the cable bridge based on the basic data;
acquiring a cable category in the cable bridge, acquiring the running state and the running time of the cable, identifying main risk factors related to the cable bridge based on the cable category, judging whether the cable bridge has danger based on the main risk factors, and identifying;
judging the recognized risk category and risk level, identifying the generation reason based on the risk category, deducing in the three-dimensional model based on the risk level, and predicting the influence range and the influence size on the cable bridge;
the dangerous categories comprise safety, criticality, danger and disastrous, the dangerous grades comprise a first grade, a second grade, a third grade and a fourth grade, and the dangerous categories are in one-to-one correspondence with the dangerous grades;
the risk level classification process comprises the following steps:
acquiring a risk assessment element corresponding to the risk level; wherein the hazard assessment element comprises an initial fire source position and an initial fire source area;
acquiring the linear distance between the initial fire source positions and the nearest cable according to the initial fire source positions, and taking the linear distance between the initial fire source positions and the nearest cable as first data;
acquiring a linear distance between the center positions of the initial fire source areas and the nearest cables according to the initial fire source areas, and taking the linear distance between the center positions of the initial fire source areas and the nearest cables as second data;
the risk level classification process further includes:
acquiring a risk evaluation score by using the first data and the second data, wherein the risk evaluation score is acquired by the following formula:
wherein W represents a risk evaluation score; w (W) 01 And W is 02 Respectively representing basic evaluation scores corresponding to preset first data and second data; l represents the linear distance between the initial fire source positions and the nearest cable; l (L) 0 Representing a distance threshold value corresponding to a preset linear distance between initial fire source positions and the nearest cable; l (L) 1 Representing the initial fire source area to obtain the linear distance between the center positions of the initial fire source area and the nearest cable; l (L) q A maximum linear distance representing a center position of the initial fire source area from the fire source area boundary line; l (L) z A linear cluster between center points of standard geometric figures which represent that the center positions of the initial fire source areas are away from the equivalent fire source areas;
obtaining a straight line distance between the center position of the initial fire source area and the nearest cable according to the initial fire source area, wherein the straight line distance comprises the following steps:
acquiring the initial fire source position and the area range formed by the fire source area;
according to the shape formed by the boundary of the area range, the area range is equivalent to the standard geometric figure closest to the shape formed by the boundary;
acquiring the center position of the standard geometric figure and the fire point position corresponding to the fire source, and acquiring the linear distance between the center position of the standard geometric figure and the fire point position corresponding to the fire source according to the center position of the standard geometric figure and the fire point position corresponding to the fire source;
selecting a position, which is 0.35-0.41 times of the linear distance and is close to the direction of the position of the ignition point, of the linear distance as the center position of the initial fire source area;
acquiring a boundary line of the nearest cable, which is close to the central position, and acquiring the shortest linear distance between the central position and the boundary line; the shortest linear distance is the linear distance between the center position of the initial fire source area and the nearest cable;
fire source environment analysis:
acquiring initial fire source position data of the cable bridge fire disaster, and simultaneously acquiring initial fire source characteristic information, wherein the initial fire source characteristic information comprises the area of an initial fire source and the ignition source of the initial fire source;
acquiring surrounding environment data of an initial fire source of the cable bridge fire, and judging fire risk level based on the surrounding environment data, the characteristic information of the initial fire source and characteristic parameters of cable materials;
comparing the fire risk level with a predicted risk level, and judging the risk of the fire of the cable bridge and the influence range of the fire of the cable bridge;
and (3) making a fire-fighting scheme:
formulating safety countermeasure measures for preventing accidents based on the fire risk pre-analysis, and formulating an emergency rescue scheme based on the risk of the cable bridge fire and the influence range and the size of the cable bridge;
and acquiring the implementation progress of the safety countermeasure measures and the implementation progress of the emergency rescue scheme, wherein the three-party fire-fighting linkage data in the emergency rescue scheme are extracted, and the fire-fighting linkage control scheduling is performed based on a three-party scheduling platform.
2. The cable bridge fire risk analysis method of claim 1, wherein: and acquiring the position data of the initial fire source of the cable bridge fire disaster, simultaneously acquiring the basic data of the cable bridge, and extracting the fireproof interval of the cable bridge in the basic data.
3. The cable bridge fire risk analysis method of claim 1, wherein: making safety countermeasure measures for preventing accidents and making emergency rescue schemes, and further comprising:
the established security countermeasure measures are prioritized for the determined risk, nuisance factors, ordered in hazard levels based on the determined hazard levels of the risk, nuisance factors, and processed based on the ordering and ordering.
4. The cable bridge fire risk analysis method of claim 1, wherein: when the risk evaluation score is lower than a first preset threshold value, judging that the risk grade is one-level; when the risk evaluation score is not lower than a first preset threshold value but lower than a second preset threshold value, judging that the risk grade is two-grade; when the risk evaluation score is not lower than a second preset threshold value but lower than a third preset threshold value, judging that the risk grade is three-grade; and when the risk evaluation score is not lower than a third preset threshold value, judging that the risk grade is four.
5. The cable bridge fire risk analysis method of claim 1, wherein: after the cable bridge is determined to have a fire disaster, whether personnel casualties exist or not is determined preferentially, and on-site medical rescue measures are carried out according to the degree of the personnel casualties or necessary rescue measures are taken and then the cable bridge is sent to a hospital for treatment.
6. The cable bridge fire risk analysis method of claim 1, wherein: after implementing the rescue scheme and extinguishing the fire, immediately organizing the accident scene to isolate and protect, organizing the accident equipment to check, confirming the damage degree of the cable, carrying out emergency repair on the accident cable to restore production, and formulating precautionary measures based on the investigation and analysis result of the accident.
7. A cable bridge fire risk analysis system for use in a cable bridge fire risk analysis method according to any one of claims 1-6, characterized in that: comprising the following steps:
the fire monitoring platform is used for acquiring basic data of the cable bridge, constructing a three-dimensional model for fire risk deduction based on the basic data, updating the three-dimensional model for fire risk deduction in real time, simulating and deducting buildings and figures in the environment based on deduction results, and matching corresponding safety countermeasure measures based on deduction results;
and the scheduling platform is used for acquiring the safety countermeasure measures, extracting the priority levels in the safety countermeasure measures, scheduling the fire-fighting equipment for each safety countermeasure measure based on the priority levels, and feeding back data after the safety countermeasure measures are completed.
8. The cable tray fire risk analysis system of claim 7, wherein: the fire monitoring platform is also used for acquiring cable bridge fire initial fire source data, inputting the cable bridge fire initial fire source data into a three-dimensional model for deduction budget, and matching corresponding emergency rescue schemes based on deduction results;
the scheduling platform is also used for acquiring the emergency rescue scheme, extracting emergency scheduling equipment in the emergency rescue scheme, and simultaneously extracting a scheduling order in the emergency rescue scheme; the emergency equipment comprises an emergency command terminal, an emergency first-aid vehicle, emergency rescue personnel and emergency rescue materials.
9. The cable tray fire risk analysis system of claim 7, wherein: the fire monitoring platform includes:
the model making unit is used for acquiring three-dimensional coordinate data in the cable bridge construction drawing actively uploaded by the system, inputting the three-dimensional coordinate data into the three-dimensional model for preliminary construction, acquiring actual three-dimensional coordinate data of the cable bridge actively uploaded by the system, and further fusing and splicing the actual three-dimensional coordinate data with the preliminarily constructed three-dimensional model;
the digital deduction unit is used for determining the cable type in the cable bridge, judging the overload and overheat cause of the cable based on the cable type, deducting the cable result in the current state in real time, displaying the deduction result in real time and carrying out early warning;
the risk assessment unit is used for judging damage to the building and the human body based on the deduction result and combining with the current environmental factors, and determining a risk assessment level;
the scheme making unit is used for making a fire-fighting scheme based on the fire cause, grading the fire-fighting scheme under the same fire cause, and making corresponding fire-fighting equipment quantity requirements based on priority;
the scheme making unit is further used for carrying out one-to-one correspondence with the fire-fighting schemes based on the risk assessment grades and carrying out data intercommunication with the dispatching platform based on the fire-fighting schemes.
10. The cable tray fire risk analysis system of claim 8, wherein: the scheduling platform comprises:
the data acquisition module is used for acquiring the fire-fighting scheme, extracting emergency first-aid vehicles, emergency rescue workers and emergency rescue materials in the fire-fighting scheme based on data types, and simultaneously acquiring the required quantity of the emergency first-aid vehicles, the emergency rescue workers and the emergency rescue materials;
acquiring the quantity data feedback of the current corresponding emergency first-aid vehicles, emergency rescue workers and the required equipment of the emergency rescue materials from the third-party dispatching equipment, and negotiating and calling the emergency equipment of other third-party dispatching equipment from the third-party dispatching equipment if the quantity is not consistent;
and the data feedback module is used for feeding back the fire-fighting progress and the fire-fighting result to the fire monitoring platform in real time, feeding back fire-fighting summary based on the fire-fighting result, analyzing accidents and establishing a table.
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