A method and system for intelligently adjusting the air environment in a large welding workshop

Abstract

The present invention discloses an intelligent air environment adjustment method and system for a large welding workshop, which belongs to the technical field of air environment adjustment in welding workshops, including a welding workshop operation data acquisition system, a welding workshop management and control system, an air environment monitoring system and a workshop ventilation and dust removal system, wherein the workshop ventilation and dust removal system includes a ventilation layout design module, a CFD simulation operation platform, and an information processing and instruction transmission module; a three-dimensional CFD analysis model of a welding workshop is established through a CFD simulation operation platform, and then adjustment work is performed in the CFD analysis model, and the results after the test adjustment are finally adjusted according to a suitable adjustment scheme to adjust the relevant equipment in the actual welding workshop. When adjusting, the pollutant concentration is used as the priority control index and the system energy consumption is used as the second control index. The present invention effectively solves the problems of high energy consumption and high operating costs caused by the large air environment management monitoring area and the particularly large overall ventilation volume in large welding workshops.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of air environment regulation in welding workshops, and specifically relates to an intelligent regulation method and system for the air environment in a large welding workshop. Background Art

[0002] For industrial plants, it is of great significance to reasonably design pollutant exhaust ventilation schemes and effectively control the content of gaseous environmental pollutants in industrial plants to achieve occupational labor protection for workers and ensure the physical and mental health of workers in the plant. Large industrial plants are generally greater than 10m in height or less than 10m in height and greater than 5000m in area. 2 The main features are high space and large volume. This feature makes the factory building have obvious thermal stratification phenomenon, the unevenness of air temperature, relative humidity and velocity in the indoor activity area increases, and it is difficult to remove pollutants from the industrial factory building in time.

[0003] Ventilation and fume exhaust are currently the most effective means of control in welding processing and production, and mainly include two types of control methods: one is to control the further spread of welding smoke and harmful gases by installing local fume extraction devices at the welding station or using smoking welding guns, and to control them from the source; the other is to improve the working environment of the welding workshop through comprehensive ventilation and replacement ventilation of the factory building. Compared with overall ventilation and dust removal, local exhaust directly controls the source of welding pollution and has the best control effect. However, the installation of dust hoods has high requirements for welding points, and generally requires the welding points to be relatively fixed, which has a greater impact on the welding of tall containers. The installation of smoking welding guns has the best control effect, but the cost is higher. In overall ventilation, due to the large space and high size of the processing workshop, it is difficult to form an effective airflow organization under natural ventilation, and mechanical equipment is required to assist ventilation.

[0004] At present, there are still some difficulties in the design of intelligent air conditioning systems for workshops in large industrial plants. The main manifestations are: compared with the ventilation and exhaust of traditional civil buildings, large production and processing workshops have high space, large volume, and obvious thermal stratification. The particles in the factory are different from those in civil buildings and outdoor environments in terms of particle size, concentration, and composition, and the deposition position is different, which will increase the difficulty of designing intelligent air conditioning systems for workshops. Secondly, when designing intelligent air conditioning systems for workshops, the ventilation volume of comprehensive ventilation is calculated based on the room air change volume or the number of air changes. For tall welding workshops, the comprehensive ventilation volume is particularly large, which will lead to economic problems of high energy consumption and high operating costs. Summary of the invention

[0005] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technology. It mainly provides an intelligent adjustment method and system for the air environment of a large welding workshop, which is used to solve the technical problems of high energy consumption and high operating costs caused by the large air environment management monitoring area and the particularly large overall ventilation volume in a large welding workshop proposed in the above background technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A method for intelligently adjusting the air environment of a large welding workshop comprises the following steps:

[0008] S1. Monitor the concentration parameters of gas pollutants in the welding workshop in real time through the air environment monitoring system. When an abnormality occurs, proceed to step S2;

[0009] S2, CFD simulation computing platform, based on the basic information provided by the welding workshop operation data acquisition system and the air environment monitoring system, establishes a three-dimensional CFD analysis model of the welding workshop, and performs analysis and calculation to obtain the air flow velocity, air flow pressure, and pollutant concentration distribution at different positions in the welding workshop, and transmits the calculation results to the information processing and instruction transmission module;

[0010] S3, the information processing and instruction transmission module uses the support vector machine machine learning algorithm to correct and fit the three-dimensional CFD analysis model of the welding workshop, and continuously modifies the model parameters until the calculation results are consistent with the actual measured pollutant concentration, air flow pressure and air flow velocity;

[0011] S4. Make corresponding adjustments based on the current distribution of pollutant concentrations:

[0012] S4-1. If the current pollutant concentration distribution is still lower than the control index, the energy consumption of the air environment intelligent adjustment system is used as the adjustment index to reduce the power of the dust removal equipment in the CFD analysis model, reduce the number of air supply and return air outlets, and reduce the fan speed, so as to further reduce the system energy consumption while meeting the pollutant concentration control index;

[0013] S4-2. If the current pollutant concentration distribution is higher than the control index, the height and angle of multiple air supply and return air outlets in the welding workshop are adjusted in the CFD analysis model, and the opening and closing of the doors and windows of the welding workshop are adjusted to enhance ventilation and reduce pollutant concentration, provided that the air environment intelligent adjustment system does not consume any energy. If the pollutant concentration in the CFD analysis model still exceeds the standard, the power of the dust removal equipment in the CFD analysis model is increased, the number of air supply and return air outlets is increased, and the fan speed is increased until the pollutant concentration control index requirements are met;

[0014] S5. The model boundary conditions that meet the requirements after adjustment in the CFD analysis model in S4 are transmitted to the welding workshop management and control system and ventilation layout design module through the information processing and instruction transmission module, so as to control and realize the adjustment of relevant equipment inside the welding workshop.

[0015] Specifically, in step S1, the abnormality is: the average concentration of pollutants exceeds a preset value, or the average concentration of pollutants changes significantly; the pollutants are at least one of particulate matter, carbon monoxide, carbon dioxide, nitrogen oxides, and ozone.

[0016] Furthermore, it also includes step S6, transmitting relevant parameter information of the welding workshop operation data acquisition system, the air environment monitoring system, and the workshop ventilation and dust removal system to the operation display module for display.

[0017] The present invention also provides an intelligent air environment adjustment system for a large welding workshop, which is applied to the above-mentioned intelligent air environment adjustment method for a large welding workshop. The intelligent air environment adjustment system for a large welding workshop includes a welding workshop operation data acquisition system, a welding workshop management and control system, an air environment monitoring system and a workshop ventilation and dust removal system. The workshop ventilation and dust removal system includes a ventilation layout design module, a CFD simulation operation platform, and an information processing and instruction transmission module. The ventilation layout design module includes dust removal equipment and a ventilation pipeline system arranged in the welding workshop. The CFD simulation operation platform is used to establish a three-dimensional high-precision ventilation airflow simulation model based on the basic information of the welding workshop, and adjust the factors and conditions affecting the airflow organization through the simulation model, so that the pollutant concentration in the air meets the control index while reducing energy consumption; the information processing and instruction transmission module is used to transmit the factors and conditions affecting the airflow organization after the CFD simulation operation platform is adjusted to the welding workshop management and control system and the ventilation layout design module, so as to realize the adjustment of relevant equipment inside the welding workshop.

[0018] Specifically, the welding workshop operation data acquisition system includes a three-dimensional space data acquisition module, a ventilation and dust removal equipment layout data module, a welding workshop door and window opening information module, and a data collection and receiving module. The three-dimensional space data acquisition module is used to obtain the spatial geometric dimension information and coordinate information of the entire workshop, and at the same time obtain the number of operating welders and welding type data in different areas and different time periods; the ventilation and dust removal equipment layout data module is used to obtain the size information of multiple air supply and return air outlets in the welding workshop, and the three-dimensional coordinate information of the installation position; the welding workshop door and window opening information module is used to obtain the door and window layout information and switch information of each area of ​​the welding workshop; the data collection and receiving module is used to receive various operation commands, and perform northbound transmission of the spatial geometric dimension information and coordinate information of the entire workshop, the number of operating welders and welding type data, and the ventilation and dust removal equipment layout data (that is, the lower-level equipment transmits information to the upper-level equipment).

[0019] Specifically, the welding workshop management and control system includes a workshop door and window switch control module, a ventilation and dust removal equipment control module, and an information data processing management module. The workshop door and window switch control module is used to control the automatic opening and closing of all doors and windows in the welding workshop, and realize the coordinated operation with the ventilation and dust removal system of the welding workshop; the ventilation and dust removal equipment control module is used to control the start and stop, output power, and fan direction of all ventilation equipment fans in the welding workshop; the information data processing management module is used for information data management of the welding workshop, ventilation and dust removal data reception, and operation information processing, so as to realize the coordinated management and operation between workshop doors and windows and ventilation and dust removal equipment.

[0020] Specifically, the air environment monitoring system includes an external natural wind speed and wind direction monitoring module, an internal environment quality monitoring module of a welding workshop, and a real-time data transmission module. The external natural wind speed and wind direction monitoring module is used to monitor the natural wind speed and wind direction of the external environment of the welding workshop, and the internal environment quality monitoring module of the welding workshop is used to monitor the internal environment quality of the welding workshop. The real-time data transmission module is used to transmit the real-time information detected by the external natural wind speed and wind direction monitoring module and the internal environment quality monitoring module of the welding workshop to the north (that is, the lower-level equipment transmits the information to the upper-level equipment).

[0021] More specifically, the welding workshop internal environment quality monitoring module includes a dust particle detection sensor, a carbon monoxide detection sensor, a carbon dioxide detection sensor, a nitrogen oxide detection sensor, an ozone detection sensor, a wind speed detection sensor, and a temperature sensor.

[0022] Specifically, the ventilation layout design module includes a cartridge dust collector, a jet fan, an electrical control system, and a piping system. The piping system includes an air supply duct and a return air duct. The two ends of the cartridge dust collector are respectively connected to the air supply duct and the return air duct. The ends of the air supply duct and the return air duct are provided with air supply outlets and return air outlets with electrically adjustable angles. The air supply outlets are arranged at the steel structure columns of the workshop through longitudinal slide grooves, and the return air outlets are arranged at the top of the workshop. The jet fan is arranged at the steel structure columns of the workshop through longitudinal slide grooves. The electrical control system is used to receive external commands to control the dust removal power and dust removal air volume of the cartridge dust collector, and independently control the angles of each air supply outlet and return air outlet, and can also control the movement of the air supply outlet and the jet fan along the longitudinal slide groove to achieve height adjustment.

[0023] Furthermore, the large-scale welding workshop air environment intelligent adjustment system also includes an operation display module, which is used to display equipment operation information, welding point station information, and environmental quality monitoring information; four-level thresholds are set for the air environment monitoring system, and different thresholds are displayed in different colors on the operation display module.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention monitors the air environment in the welding workshop through the air environment monitoring system, and can timely discover abnormal pollutant concentration phenomena; then adjustments are made through the workshop ventilation and dust removal system and the welding workshop management and control system, with the pollutant concentration being the priority control indicator and the system energy consumption being the second control indicator during the adjustment, that is, while ensuring that the pollutant concentration meets the standard, the system energy consumption is reduced as much as possible, effectively solving the problems of high energy consumption and high operating costs caused by the large air environment management monitoring area and the particularly large overall ventilation volume in large welding workshops.

[0026] The present invention uses the CFD simulation computing platform in the workshop ventilation and dust removal system, and takes the workshop three-dimensional space data and the workshop internal and external environmental parameter data provided by the welding workshop operation data acquisition system and the air environment monitoring system as basic information to establish a three-dimensional CFD analysis model of the welding workshop, and continuously modifies the model parameters until the internal gas organization of the CFD analysis model is consistent with the internal gas organization of the workshop in reality. Then, the adjustment work is carried out in the CFD analysis model, and the simulation effect is achieved by the results after the test adjustment, so that the optimal adjustment plan can be determined, and finally the relevant equipment in the welding workshop in reality can be adjusted according to the optimal adjustment plan. The establishment of the simulation model and its experimental data are highly reliable, and the optimal adjustment plan can be obtained more conveniently, and the automatic operation of doors and windows and ventilation and dust removal equipment in the workshop can be realized.

[0027] The present invention also specifically designs the installation height, spacing and other position parameters of the sensors in the air environment monitoring system, and also specifically designs the installation parameters of the cartridge dust collector, jet fan, piping system, etc. in the workshop ventilation and dust removal system. It can be better adapted to large industrial plants and lay a good foundation for the acquisition of basic information and the control of ventilation adjustment, thereby ensuring the accuracy of intelligent adjustment of the air environment in large welding workshops.

[0028] In the optimization scheme of the present invention, the information such as equipment operation, welding point position, and environmental quality monitoring is displayed through the operation display module. The platform interface can be interactive, and the functions of the large screen, computer terminal, and mobile phone terminal can be applied synchronously. The administrator can perform background monitoring on the large screen, computer terminal, and mobile phone terminal simultaneously, and observe or control the distribution and opening and closing of doors and windows in the three-dimensional model workshop and the distribution and opening and closing of dust removal equipment. The operation display module can display the real-time energy consumption of the air environment intelligent adjustment system and the energy consumption of each sub-item, and record them.

[0029] The present invention sets four thresholds for the air environment monitoring system. Different thresholds are displayed in different colors on the operation display module, which is convenient for managers to intuitively identify the air environment of the workshop and conduct management and control and environmental warning for different areas in advance. In this way, the air environment of the workshop can be adjusted in a timely and targeted manner. A healthy, safe and comfortable production and processing environment is created to improve the production efficiency of the production workshop.

[0030] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural block diagram of the intelligent air environment adjustment system for a large welding workshop of the present invention;

[0032] Figure numerals: 10, operation display module; 20, welding workshop operation data acquisition system; 201, three-dimensional space data acquisition module; 202, ventilation and dust removal equipment layout data module; 203, welding workshop door and window opening information module; 204, data collection and receiving module; 30, welding workshop management and control system; 301, workshop door and window switch control module; 302, ventilation and dust removal equipment control module; 303, information data processing management module; 40, air environment monitoring system; 401, external natural wind speed and wind direction monitoring module; 402, welding workshop internal environment quality monitoring module; 403, data real-time transmission module; 50, workshop ventilation and dust removal system; 501, ventilation layout design module; 502, CFD simulation operation platform; 503, information processing and instruction transmission module. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0034] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] Example 1: Please refer to the attached Figure 1 A large-scale welding workshop air environment intelligent adjustment system includes a welding workshop air environment intelligent adjustment platform, and the welding workshop air environment intelligent adjustment platform includes ① an operation display module 10, ② a welding workshop operation data acquisition system 20, ③ a welding workshop management and control system 30, ④ an air environment monitoring system 40, and ⑤ a workshop ventilation and dust removal system 50.

[0037] ① The operation display module 10 is used to display equipment operation information, welding point station information, and environmental quality monitoring information. The operation display module 10 obtains relevant data from the welding workshop operation data acquisition system 20, the air environment monitoring system 40, and the workshop ventilation and dust removal system 50, and displays it in the form of a platform interface, and uploads it to the cloud server at the same time. The platform interface can perform human-computer interaction and realize the synchronous application of functions on the large screen, computer and mobile phone. The administrator can perform background monitoring on the large screen, computer and mobile phone simultaneously, and observe or control the distribution and opening and closing of doors and windows in the three-dimensional model workshop and the distribution and opening and closing of dust removal equipment. The operation display module can display the real-time energy consumption of the air environment intelligent adjustment system and the energy consumption of each sub-item, and record them.

[0038] ② The welding workshop operation data acquisition system 20 includes:

[0039] The three-dimensional spatial data acquisition module 201 is used to obtain the spatial geometric size information and coordinate information of the entire workshop, and at the same time obtain the number of operating welders and welding type data in different areas and different time periods; in the three-dimensional spatial data acquisition module 201, for large components that may affect the airflow organization due to large welding equipment, a laser radar scanner is installed at the welding work point to determine the geometric size and spatial position coordinate information of the large welding components;

[0040] The ventilation and dust removal equipment layout data module 202 is used to obtain the size information and three-dimensional coordinate information of the installation positions of multiple air supply and return air outlets in the welding workshop;

[0041] The welding workshop door and window opening information module 203 is used to obtain the door and window layout information and switch information of each area of ​​the welding workshop, so as to realize the management and control of the welding workshop;

[0042] The data collection and receiving module 204 is used to receive various operation commands, and transmit the spatial geometric dimension information and coordinate information of the entire workshop, the number of operating welders and welding type data, and the layout data of ventilation and dust removal equipment to other modules.

[0043] ③ The welding workshop management and control system 30 includes:

[0044] The workshop door and window switch control module 301 is used to control the automatic opening and closing of all doors and windows in the welding workshop, and realize the coordinated operation with the ventilation and dust removal system of the welding workshop;

[0045] The ventilation and dust removal equipment control module 302 is used to control the start and stop, output power, and fan direction of all ventilation equipment fans in the welding workshop, so as to change the working state of the ventilation equipment and dust removal equipment according to the design requirements;

[0046] The information data processing management module 303 is used for information data management of the welding workshop, ventilation and dust removal data reception, and operation information processing, so as to realize the coordinated management and operation between the workshop doors and windows and the ventilation and dust removal equipment.

[0047] ④ The air environment monitoring system 40 includes:

[0048] External natural wind speed and wind direction monitoring module 401, used to monitor the natural wind speed and wind direction of the external environment of the welding workshop;

[0049] The welding workshop internal environment quality monitoring module 402 includes: dust particle detection sensor (PM2.5 / PM10), carbon monoxide detection sensor, carbon dioxide detection sensor, nitrogen oxide detection sensor, ozone detection sensor, wind speed detection sensor, and temperature sensor. The dust particle detection sensor (PM2.5 / PM10), carbon monoxide detection sensor, carbon dioxide detection sensor, nitrogen oxide detection sensor, and ozone detection sensor are arranged every 50 meters along the longitudinal walls of the factory building, and the arrangement heights are 1.5m and 10m respectively. The wind speed detection sensor and temperature sensor are installed on the cross arm of the mobile gantry crane in the welding workshop, and can perform multi-point measurements as the gantry crane moves;

[0050] The data real-time transmission module 403 is used to transmit the real-time information detected by the external natural wind speed and wind direction monitoring module 401 and the welding workshop internal environment quality monitoring module 402 to the CFD simulation operation platform 502;

[0051] ⑤ The workshop ventilation and dust removal system 50 includes:

[0052] The ventilation layout design module 501 includes a cartridge dust collector, a jet fan, an electronic control system, and a piping system. The piping system includes an air supply duct and a return air duct. The two ends of the cartridge dust collector are respectively connected to the air supply duct and the return air duct. The ends of the air supply duct and the return air duct are provided with an air supply port and a return air port with electrically adjustable angles. The air supply port adopts a longitudinal slide groove, which is arranged at the steel structure column of the workshop at a spacing of 10m, and the diameter of the air port is 300*400mm. The return air port is arranged at the top of the workshop in the form of a hanger, and is arranged at a horizontal spacing of 20m and a longitudinal spacing of 40m. The jet fan adopts a longitudinal slide groove, which is arranged at the steel structure column of the workshop at a spacing of 10m. The electronic control system can receive external instructions to control the dust removal power and dust removal air volume of the cartridge dust collector, and independently control the angles of each air supply port and return air port; the electronic control system can control the air supply port and the jet fan to move longitudinally along the slide groove according to external instructions to achieve height adjustment;

[0053] CFD simulation computing platform 502 is used to establish a three-dimensional high-precision ventilation airflow simulation model. The geometric model is established through the three-dimensional spatial data of the workshop and the spatial data of large welding components. The temperature spatial information fed back by the temperature sensor and the outlet and return air outlet information fed back by the workshop ventilation and dust removal system are used as boundary conditions to calculate the airflow organization in the welding workshop every hour. The calculation results include the airflow velocity, airflow pressure, and pollutant concentration distribution at different positions in the welding workshop;

[0054] The information processing and instruction transmission module 503 includes an information processing module and an information instruction transmission module. The information processing module can combine the airflow velocity, airflow pressure, and pollutant concentration distribution of the CFD simulation operation platform with the airflow velocity, airflow pressure, and pollutant real concentration distribution data detected by various sensors detected by the internal environmental quality monitoring module, and use the support vector machine machine learning algorithm to correct and fit the original CFD calculation model. And continuously modify the model boundary conditions until the calculation results meet the requirements of the pollutant concentration control index. The information instruction transmission module can transmit the modified CFD model boundary conditions to the welding workshop management and control system 30 to control the opening and closing of doors and windows, and to the electric control system controlled by the workshop ventilation and dust removal system 50, to control the height, wind speed, and angle of the air supply port and the jet fan, and to control the working power of the filter cartridge dust collector.

[0055] A large-scale welding workshop air environment intelligent adjustment method, based on the large-scale welding workshop air environment intelligent adjustment system, the adjustment method comprises the following steps:

[0056] S1. The dust particle detection sensor (PM2.5 / PM10) detects that the average concentration of particles within 1.5m height (suitable for human breathing height) exceeds 4 mg / m 3 (control index), the workshop ventilation and dust removal system 50 is turned on by default, and the height, wind speed, angle of the air supply port, return air port and jet fan, and the working power of the filter cartridge dust collector are first set according to the default values.

[0057] S2. The welding workshop operation data acquisition system 20 obtains the geometric size information and coordinate information of the welding workshop, the geometric size and spatial position coordinate information of large welding components, and the number of operating welders and welding type data in different areas and time periods according to the current workshop working status; obtains the size information of multiple air supply and return air outlets in the welding workshop and the three-dimensional coordinate information of the installation position; the air environment monitoring system 40 detects the natural wind speed and wind direction data of the current workshop external environment and the gas composition and concentration parameters inside the welding workshop. The above information is transmitted to the CFD simulation computing platform 502 and the information processing and instruction transmission module 503 in the workshop ventilation and dust removal system 50.

[0058] S3, the CFD simulation operation platform 502 establishes a three-dimensional CFD analysis model of the welding workshop based on the relevant information obtained in steps S1 and S2, and performs analysis and calculation to obtain the air flow velocity, air flow pressure, and pollutant concentration distribution at different locations in the welding workshop, and transmits the calculation results to the information processing and instruction transmission module 503.

[0059] S4, the information processing and instruction transmission module 503 uses the support vector machine machine learning algorithm to modify and fit the original CFD analysis model. And continuously modify the model parameters (including but not limited to the adjustment of the number of CFD model grids, grid size, turbulence model, turbulence intensity, and model convergence criteria) until the calculation results are consistent with the actual measured pollutant concentration, airflow pressure, and airflow velocity.

[0060] S5-1. If the current pollutant concentration distribution is still lower than the control index, the energy consumption of the air environment intelligent adjustment system is used as the adjustment index to adjust the power of the dust removal equipment and the number of air supply and return air outlets and the wind speed in the CFD analysis model (reduce the power of the dust removal equipment in the CFD analysis model, reduce the number of air supply and return air outlets, and reduce the fan speed) to further reduce the system energy consumption while meeting the pollutant concentration control index.

[0061] S5-2. If the current pollutant concentration distribution is higher than the control index, then on the premise that the energy consumption of the intelligent air environment adjustment system remains unchanged, adjust the optimal heights and angles of multiple air supply and return air outlets in the welding workshop in the CFD analysis model, and adjust the opening and closing of the doors and windows of the welding workshop to enhance ventilation and reduce pollutant concentration; if the pollutant concentration in the CFD analysis model still exceeds the standard, adjust the equipment power and the wind speed of the air supply and return air outlets (increase the power of the dust removal equipment in the CFD analysis model, increase the number of air supply and return air outlets, and increase the fan speed) until the pollutant concentration control index requirements are met.

[0062] S6. The model boundary conditions that meet the requirements in the CFD analysis model in S5-1 and S5-2, namely the height, wind speed, angle of the air supply port, return air port and jet fan, and the door and window opening and closing commands are transmitted to the welding workshop management and control system 30 and the ventilation layout design module 501 through the information processing and instruction transmission module 503 to control and realize the adjustment of relevant equipment inside the welding workshop.

[0063] S7. The working information of the workshop ventilation and dust removal system 50, such as the height, wind speed, and angle of the air supply port, return air port, and jet fan, the working power of the filter cartridge dust collector, and the information collected by the welding workshop operation data acquisition system 20 and the air environment monitoring system 40 are transmitted to the operation display module 10, so as to realize the synchronous application of the functions of the large screen, PC and mobile phone. The administrator can also synchronously monitor the background through the large screen, PC and mobile phone, and observe or control the distribution and opening and closing of the doors and windows of the three-dimensional model workshop, as well as the distribution and opening and closing of the dust removal equipment.

[0064] Embodiment 2: This embodiment differs from Embodiment 1 in that:

[0065] S1. When the dust particle detection sensor (PM2.5 / PM10) detects a significant change in the average concentration of particles within a height of 1.5m, the workshop ventilation and dust removal system 50 is turned on by default, and the height, wind speed, angle of the air supply port, return air port and jet fan, and the working power of the filter cartridge dust collector are first set according to the default values.

[0066] Steps S2-S7 are the same as in Example 1.

[0067] The rest is the same as in Example 1.

[0068] Embodiment 3: This embodiment differs from Embodiment 1 in that:

[0069] In this embodiment, the welding air environment monitoring system 40 sets four thresholds, and the monitoring areas corresponding to different thresholds are displayed in different colors on the operation display module. The corresponding colors from low to high thresholds are green, yellow, orange, and red. When the color turns red, an early warning will be issued to the administrator.

[0070] The rest is the same as in Example 1.

[0071] Embodiment 4: This embodiment differs from Embodiment 1 in that:

[0072] S1. The carbon monoxide detection sensor detects that the average carbon monoxide concentration within a height of 1.5m exceeds 20 mg / m 3 (control index), the workshop ventilation and dust removal system 50 is turned on by default, and the height, wind speed, angle of the air supply port, return air port and jet fan, and the working power of the filter cartridge dust collector are first set according to the default values.

[0073] Steps S2-S7 are the same as in Example 1.

[0074] The rest is the same as in Example 1.

[0075] Embodiment 5: This embodiment differs from Embodiment 1 in that:

[0076] S1. The carbon dioxide detection sensor detects that the average carbon dioxide concentration within a height of 1.5m exceeds 9000 mg / m 3 (control index), the workshop ventilation and dust removal system 50 is turned on by default, and the height, wind speed, angle of the air supply port, return air port and jet fan, and the working power of the filter cartridge dust collector are first set according to the default values.

[0077] Steps S2-S7 are the same as in Example 1.

[0078] The rest is the same as in Example 1.

[0079] Embodiment 6: This embodiment differs from Embodiment 1 in that:

[0080] S1. The nitrogen oxide detection sensor detects that the average nitrogen oxide concentration within 1.5m height exceeds 5 mg / m 3 (control index), the workshop ventilation and dust removal system 50 is turned on by default, and the height, wind speed, angle of the air supply port, return air port and jet fan, and the working power of the filter cartridge dust collector are first set according to the default values.

[0081] Steps S2-S7 are the same as in Example 1.

[0082] The rest is the same as in Example 1.

[0083] Embodiment 7: This embodiment differs from Embodiment 1 in that:

[0084] S1. The ozone detection sensor detects that the average ozone concentration within a height of 1.5m exceeds 0.3 mg / m 3 (control index), the workshop ventilation and dust removal system 50 is turned on by default, and the height, wind speed, angle of the air supply port, return air port and jet fan, and the working power of the filter cartridge dust collector are first set according to the default values.

[0085] Steps S2-S7 are the same as in Example 1.

[0086] The rest is the same as in Example 1.

[0087] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for intelligently adjusting the air environment of a large welding workshop, the method being implemented by an intelligent adjustment system, the system comprising a welding workshop operation data acquisition system (20), a welding workshop management and control system (30), an air environment monitoring system (40) and a workshop ventilation and dust removal system (50), the workshop ventilation and dust removal system (50) comprising a ventilation layout design module (501), a CFD simulation operation platform (502), and an information processing and instruction transmission module (503), the ventilation layout design module (501) comprising dust removal equipment and a ventilation pipeline system arranged in the welding workshop, the CFD simulation operation platform (502) being used to establish a three-dimensional high-precision ventilation airflow simulation model based on basic information of the welding workshop, and to adjust factors and conditions affecting the airflow organization through the simulation model, so that the pollutant concentration in the air meets the control index while reducing energy consumption; the information processing and instruction transmission module (503) being used to transmit the factors and conditions affecting the airflow organization adjusted by the CFD simulation operation platform (502) to the welding workshop management and control system (30) and the ventilation layout design module (501), so as to adjust relevant equipment inside the welding workshop, characterized in that: The steps include: S1, monitoring the concentration parameters of gas pollutants in the welding workshop in real time through the air environment monitoring system (40), and when an abnormality occurs, proceeding to step S2; The air environment monitoring system 40 includes: a welding workshop internal environment quality monitoring module 402, which includes: a dust particle detection sensor, a carbon monoxide detection sensor, a carbon dioxide detection sensor, a nitrogen oxide detection sensor, an ozone detection sensor, a wind speed detection sensor, and a temperature sensor. The dust particle detection sensor (PM2.5 / PM10), carbon monoxide detection sensor, carbon dioxide detection sensor, nitrogen oxide detection sensor, and ozone detection sensor are arranged every 50 meters along the longitudinal walls of the factory building, and the arrangement heights are 1.5m and 10m respectively. The wind speed detection sensor and the temperature sensor are installed at the cross arm of the mobile gantry crane in the welding workshop, and can move with the gantry crane to perform multi-point measurement; S2, the CFD simulation operation platform (502) establishes a three-dimensional CFD analysis model of the welding workshop based on the basic information provided by the welding workshop operation data acquisition system (20) and the air environment monitoring system (40), and performs analysis and calculation to obtain the air flow velocity, air flow pressure, and pollutant concentration distribution at different positions in the welding workshop, and transmits the calculation results to the information processing and instruction transmission module (503); S3, the information processing and instruction transmission module (503) uses a support vector machine machine learning algorithm to correct and fit the three-dimensional CFD analysis model of the welding workshop, and continuously modifies the model parameters until the calculation results are consistent with the actually measured pollutant concentration, air flow pressure and air flow velocity; S4. Make corresponding adjustments based on the current distribution of pollutant concentrations: S4-1. If the current pollutant concentration distribution is still lower than the control index, the energy consumption of the air environment intelligent adjustment system is used as the adjustment index to reduce the power of the dust removal equipment in the CFD analysis model, reduce the number of air supply and return air outlets, and reduce the fan speed, so as to further reduce the system energy consumption while meeting the pollutant concentration control index; S4-2. If the current pollutant concentration distribution is higher than the control index, the height and angle of multiple air supply and return air outlets in the welding workshop are adjusted in the CFD analysis model, and the opening and closing of the doors and windows of the welding workshop are adjusted to enhance ventilation and reduce pollutant concentration, provided that the air environment intelligent adjustment system does not consume any energy. If the pollutant concentration in the CFD analysis model still exceeds the standard, the power of the dust removal equipment in the CFD analysis model is increased, the number of air supply and return air outlets is increased, and the fan speed is increased until the pollutant concentration control index requirements are met; S5, transmitting the model boundary conditions that meet the requirements after adjustment in the CFD analysis model in S4 to the welding workshop management and control system (30) and the ventilation layout design module (501) through the information processing and instruction transmission module (503), so as to control and realize the adjustment of relevant equipment inside the welding workshop; In step S1, the abnormality is: the average concentration of pollutants exceeds a preset value, or the average concentration of pollutants changes significantly; the pollutants are at least one of particulate matter, carbon monoxide, carbon dioxide, nitrogen oxides, and ozone; The method further comprises step S6, transmitting relevant parameter information of the welding workshop operation data acquisition system (20), the air environment monitoring system (40), and the workshop ventilation and dust removal system (50) to the operation display module (10) for display.

2. According to claim 1, a large-scale welding workshop air environment intelligent adjustment method is characterized by: The welding workshop operation data acquisition system (20) comprises a three-dimensional space data acquisition module (201), a ventilation and dust removal equipment layout data module (202), a welding workshop door and window opening information module (203), and a data collection and receiving module (204). The three-dimensional space data acquisition module (201) is used to obtain spatial geometric dimension information and coordinate information of the workshop as a whole, and simultaneously obtain the number of operating welders and welding type data in different areas and different time periods; the ventilation and dust removal equipment layout data module (202) is used to obtain dimension information and three-dimensional coordinate information of installation positions of multiple air supply and return vents in the welding workshop; the welding workshop door and window opening information module (203) is used to obtain door and window layout information and switch information of each area of ​​the welding workshop; the data collection and receiving module (204) is used to receive various operation commands, and perform northbound transmission of spatial geometric dimension information and coordinate information of the workshop as a whole, the number of operating welders and welding type data, and ventilation and dust removal equipment layout data.

3. According to claim 1, a large-scale welding workshop air environment intelligent adjustment method is characterized by: The welding workshop management and control system (30) comprises a workshop door and window switch control module (301), a ventilation and dust removal equipment control module (302), and an information data processing management module (303). The workshop door and window switch control module (301) is used to control the automatic opening and closing of all doors and windows in the welding workshop, so as to achieve coordinated operation with the ventilation and dust removal system of the welding workshop; the ventilation and dust removal equipment control module (302) is used to control the start and stop, output power, and fan direction of all ventilation equipment fans in the welding workshop; and the information data processing management module (303) is used for welding workshop information data management, ventilation and dust removal data reception, and operation information processing, so as to achieve coordinated management and operation between workshop doors and windows and ventilation and dust removal equipment.

4. According to claim 1, a large-scale welding workshop air environment intelligent adjustment method is characterized by: The air environment monitoring system (40) comprises an external natural wind speed and wind direction monitoring module (401), a welding workshop internal environment quality monitoring module (402), and a data real-time transmission module (403), wherein the external natural wind speed and wind direction monitoring module (401) is used to monitor the natural wind speed and wind direction of the external environment of the welding workshop, the welding workshop internal environment quality monitoring module (402) is used to monitor the internal environment quality of the welding workshop, and the data real-time transmission module (403) is used to transmit real-time information detected by the external natural wind speed and wind direction monitoring module (401) and the welding workshop internal environment quality monitoring module (402) to the north.

5. The intelligent air environment adjustment method for a large welding workshop according to claim 4 is characterized in that: The welding workshop internal environment quality monitoring module (402) comprises a dust particle detection sensor, a carbon monoxide detection sensor, a carbon dioxide detection sensor, a nitrogen oxide detection sensor, an ozone detection sensor, a wind speed detection sensor, and a temperature sensor.

6. The intelligent air environment adjustment method for a large welding workshop according to claim 1 is characterized by: The ventilation layout design module (501) includes a filter cartridge dust collector, a jet fan, an electric control system, and a pipeline system. The pipeline system includes an air supply pipeline and a return air pipeline. The two ends of the filter cartridge dust collector are respectively connected to the air supply pipeline and the return air pipeline. The ends of the air supply pipeline and the return air pipeline are provided with an air supply port and a return air port with electrically adjustable angles. The air supply port is arranged at the steel structure column of the workshop through a longitudinal slide groove, and the return air port is arranged at the top of the workshop. The jet fan is arranged at the steel structure column of the workshop through a longitudinal slide groove. The electric control system is used to receive external instructions to control the dust removal power and dust removal air volume of the filter cartridge dust collector, and independently control the angles of each air supply port and return air port. It can also control the air supply port and the jet fan to move along the longitudinal slide groove to achieve height adjustment.

7. The method for intelligently adjusting the air environment of a large welding workshop according to claim 1 is characterized in that: It also includes an operation display module (10), which is used to display equipment operation information, welding point workstation information, and environmental quality monitoring information; four levels of thresholds are set for the air environment monitoring system (40), and different thresholds are displayed in different colors on the operation display module (10).

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