Rail type routing inspection hydrogen leakage positioning and directional explosion suppression system and method for hydrogen energy facility

Abstract

The invention discloses a hydrogen energy facility rail type inspection hydrogen leakage positioning and directional explosion suppression system and method. The explosion suppression system comprises a track, an explosion suppression unit, an inspection device and a control center. The inspection device is installed on the track and can move in the direction of the track and form at least one inspection path to detect the hydrogen concentration, the wind speed, the temperature and the humidity of each point on the inspection path. The control center is used for judging whether the hydrogen concentration is greater than a preset concentration or not, if so, performing fusion calculation on the hydrogen concentration, the wind speed, the temperature and the humidity, analyzing and acquiring the coordinates and the diffusion direction of the leakage point, and controlling the explosion suppression unit closest to the leakage point and / or in the diffusion direction to drive the plurality of nozzles to spray; otherwise, controlling the inspection device to continuously perform periodic inspection on the inspection path. According to the invention, the success of explosion suppression can be ensured, the sprayed water mist can be maximized, the hydrogen concentration is reduced, the closed-loop linkage of detection and explosion suppression is realized, and the device has the advantages of efficient explosion suppression and resource saving.

Description

Technical Field

[0001] The present invention relates to an explosion suppression system in the technical field of hydrogen energy safety protection, and particularly to an orbital inspection hydrogen leakage positioning and directional explosion suppression system for hydrogen energy facilities, and also relates to an orbital inspection hydrogen leakage positioning and directional explosion suppression method for hydrogen energy facilities. Background Art

[0002] Hydrogen energy facilities mainly include fixed hydrogen refueling stations, mobile hydrogen refueling facilities, hydrogen transmission pipeline corridors, chemical hydrogen storage bases, etc. Among them, a hydrogen refueling station is a dedicated facility that provides hydrogen replenishment for hydrogen fuel cell vehicles. It is similar to a traditional gas station, but transports high-pressure hydrogen instead of fuel. Its working principle is to pressurize hydrogen to hundreds of atmospheres through a compressor and store it in a high-pressure gas storage tank. During refueling, it is safely and quickly filled into the vehicle's hydrogen tank through a dedicated hydrogen refueling machine. The whole process usually only takes 3 - 5 minutes to complete, and the endurance can reach 500 - 700 kilometers. The core equipment of a hydrogen refueling station includes a gas unloading column, a compressor, a hydrogen storage bottle group, a cooling system, and a hydrogen refueling machine. Currently, it is mainly divided into two types: externally supplied hydrogen (hydrogen transported from a chemical plant) and on-site hydrogen production (electrolysis of water or natural gas reforming). As the infrastructure of hydrogen energy transportation, hydrogen refueling stations are of great significance for achieving zero carbon emissions.

[0003] There are significant defects in the safety protection of traditional hydrogen refueling stations: fixed sensors cannot cover dynamic leakage paths, and manual inspection has low efficiency and is dangerous; the coverage range of traditional sprinkler systems is fixed, the water mist distribution is uneven, which easily leads to explosion suppression lag or waste of water resources; the low density and high diffusibility of hydrogen make it difficult for existing technologies to quickly respond to leaks, and there is an urgent need for an intelligent and precise active explosion suppression solution. Summary of the Invention

[0004] To solve the technical problems of low efficiency and danger in inspection and poor explosion suppression effect in the existing safety protection of hydrogen refueling stations, the present invention provides an orbital inspection hydrogen leakage positioning and directional explosion suppression system and method for hydrogen energy facilities.

[0005] The present invention is implemented by the following technical solutions: An orbital inspection hydrogen leakage positioning and directional explosion suppression system for hydrogen energy facilities, which includes:

[0006] A track, which is deployed along the protection area;

[0007] At least one explosion suppression unit, each explosion suppression unit includes a plurality of nozzles; the plurality of nozzles are dispersedly installed in the protection area;

[0008] An inspection device, which is installed on the track and can move along the track direction to form at least one inspection path, and simultaneously detect the hydrogen concentration, wind speed, temperature, and humidity at each point on the inspection path;

[0009] A control center, which is used to determine whether the hydrogen concentration is greater than a preset concentration. If so, it performs a fusion calculation on the hydrogen concentration, the wind speed, the temperature, and the humidity, and analyzes and obtains the coordinates and the diffusion direction of the leakage point according to the calculation result, and controls the explosion suppression units closest to the leakage point and / or in the diffusion direction to drive the corresponding multiple nozzles to spray. Otherwise, it controls the inspection device to continue to perform periodic inspections on the inspection path.

[0010] In the present invention, the inspection device performs periodic inspections on the track. During the inspection process, it detects the hydrogen concentration, temperature, humidity, wind speed, etc. It can detect various data in the entire protection area within a short time using a set of sensors, and determines whether there is hydrogen leakage according to the detected data, and determines the coordinates and the diffusion direction of the leakage point. In this way, the control center can locate the leakage point and direct the leakage, so as to control the explosion suppression unit to perform fixed-point and directional explosion suppression. It can not only ensure the success of explosion suppression, but also maximize the use of the water mist sprayed by the nozzles, reduce the hydrogen concentration in the air, realize the closed-loop linkage of detection and explosion suppression, and has the advantages of efficient explosion suppression and resource conservation. It solves the technical problems of low inspection efficiency and danger, and poor explosion suppression effect in the existing safety protection of hydrogen refueling stations. The inspection efficiency is significantly improved, and accurate explosion suppression can be achieved.

[0011] As a further improvement of the above solution, the inspection device includes an inspection vehicle, a temperature sensor, a humidity sensor, a hydrogen concentration sensor, and a wind speed sensor; the inspection vehicle is installed on the track and moves along the inspection path; the temperature sensor is installed on the inspection vehicle and is used to detect and obtain the temperature in real time; the humidity sensor is installed on the inspection vehicle and is used to detect and obtain the humidity in real time; the hydrogen concentration sensor is installed on the inspection vehicle and is used to detect and obtain the hydrogen concentration in real time; the wind speed sensor is installed on the inspection vehicle and is used to detect and obtain the wind speed in real time; the control center is installed on the inspection vehicle.

[0012] As a further improvement of the above solution, each explosion suppression unit further includes a water pipe, a plurality of electromagnetic valves corresponding to the multiple nozzles respectively, and a plurality of sections of pipelines corresponding to the multiple electromagnetic valves respectively; each electromagnetic valve is installed on the corresponding pipeline, one end of each pipeline is connected to the corresponding nozzle, and the other end is connected to the water pipe; the control center drives the corresponding nozzles to spray by controlling the opening and closing of the electromagnetic valves.

[0013] Further, each solenoid valve is internally provided with a pressure sensor and a flow meter. The pressure sensor is used to detect the water pressure in the corresponding pipeline in real time, and the flow meter is used to detect the water flow rate in the corresponding pipeline in real time. The control center is further used to compare the water pressure with a preset pressure, compare the water flow rate with a preset flow rate, and dynamically adjust the PWM duty cycle of the solenoid valve according to the comparison results through a preset PID algorithm.

[0014] Further, the control center also obtains the spraying time of the corresponding nozzle through the working time of each solenoid valve, and judges whether the spraying time exceeds a preset duration. If so, the corresponding solenoid valve is closed; otherwise, the corresponding solenoid valve is kept open. When the communication between each solenoid valve and the control center is interrupted, each solenoid valve automatically resets to the closed state, so that the nozzle does not perform spraying work.

[0015] As a further improvement of the above solution, multiple nozzles are arranged at equal intervals in a rectangle, and the track is arranged around the multiple nozzles.

[0016] As a further improvement of the above solution, the track is an annular track and surrounds the protection area.

[0017] As a further improvement of the above solution, the control center is further used to generate a real-time data statistical table and a statistical curve of each inspection point on the inspection path according to the hydrogen concentration, the wind speed, the temperature, and the humidity, and select a corresponding explosion suppression scheme according to a variety of preset curves in the preset system library to control the explosion suppression units closest to the leakage point and / or in the diffusion direction.

[0018] As a further improvement of the above solution, the explosion suppression system further includes:

[0019] A fixing device, which is arranged on the protection area; the track is installed on the fixing device and is located on the protection area.

[0020] The present invention also provides a method for hydrogen leakage positioning and directional explosion suppression of an orbital inspection of a hydrogen energy facility, which is applied to any one of the above hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression systems; the explosion suppression method includes the following steps:

[0021] Detect the hydrogen concentration, wind speed, temperature, and humidity at each point on the inspection path;

[0022] Determine whether the hydrogen concentration is greater than a preset concentration. If so, perform fusion calculation on the hydrogen concentration, the wind speed, the temperature, and the humidity, and analyze and obtain the coordinates and diffusion direction of the leakage point according to the calculation result, and control the explosion suppression units closest to the leakage point and / or in the diffusion direction to drive the corresponding multiple nozzles to spray. Otherwise, control the inspection device to continue periodic inspection on the inspection path.

[0023] Compared with the existing safety protection system for hydrogen refueling stations, the hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system and method of the present invention have the following beneficial effects:

[0024] 1. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system periodically inspects on the track through the inspection device, detects hydrogen concentration, temperature, humidity, wind speed, etc. during the inspection process, can detect various data in the entire protection area with a group of sensors in a relatively short time, and determines whether there is hydrogen leakage according to the detection data, and determines the coordinates and diffusion direction of the leakage point. In this way, the control center can locate the leakage point and direct the leakage, so as to control the explosion suppression unit to perform fixed-point and directional explosion suppression, which can not only ensure the success of explosion suppression, but also maximize the use of the water mist sprayed by the nozzles, reduce the hydrogen concentration in the air, realize the closed-loop linkage of detection and explosion suppression, and has the advantages of high-efficiency explosion suppression and resource saving, solves the technical problems of low inspection efficiency and danger and poor explosion suppression effect in the existing safety protection of hydrogen refueling stations, significantly improves the inspection efficiency, and can accurately suppress explosions.

[0025] 2. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system uses the inspection vehicle to move on the track, so that the temperature sensor, humidity sensor, hydrogen concentration sensor and wind speed sensor can continuously detect in the track direction, can timely collect various data on the inspection path, and accurately locate the leakage point and track the diffusion direction by performing fusion calculation on the collected various data, and preferentially start the explosion suppression unit closest to the leakage point to achieve high-efficiency directional explosion suppression. Moreover, since these sensors are all located on an inspection vehicle, integration can be achieved, the structure is simple, and the system design is easier to implement, which can save resources.

[0026] 3. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system can be applied to various scenarios, such as fixed hydrogen refueling stations, mobile hydrogen refueling facilities, hydrogen transmission pipeline corridors, chemical hydrogen storage bases, etc., with a wide range of usage scenarios, and can greatly reduce the installation and usage costs. Brief Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system according to Embodiment 1 of the present invention;

[0028] Figure 2 is Figure 1 a schematic structural diagram of an inspection device of an orbiting inspection hydrogen leakage location and directional explosion suppression system for hydrogen energy facilities in

[0029] Figure 3 is Figure 1 a partial schematic structural diagram of an explosion suppression unit of an orbiting inspection hydrogen leakage location and directional explosion suppression system for hydrogen energy facilities in

[0030] Figure 4 a flowchart of a method for orbiting inspection hydrogen leakage location and directional explosion suppression of hydrogen energy facilities according to Embodiment 3 of the present invention.

[0031] Symbol description:

[0032] 1 Inspection device 8 Pipeline

[0033] 2 Sprinkler head 11 Inspection vehicle

[0034] 3 Track 12 Temperature sensor

[0035] 4 Fixing device 13 Humidity sensor

[0036] 5 Water pipe 14 Hydrogen concentration sensor

[0037] 6 Control center 15 Wind speed sensor

[0038] 7 Solenoid valve Detailed implementation manners

[0039] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] Embodiment 1

[0041] Please refer to Figure 1 、 Figure 2 and Figure 3, this embodiment provides an orbital inspection hydrogen leakage location and directional explosion suppression system for hydrogen energy facilities. This explosion suppression system can be used in scenarios such as fixed hydrogen refueling stations, mobile hydrogen refueling facilities, hydrogen pipeline corridors, and chemical hydrogen storage bases to conduct real-time inspections on the protected area and locate and direct the leakage points. Among them, the application scenarios of this embodiment are: fixed hydrogen refueling stations: covering high-risk areas such as hydrogen storage tank areas, hydrogen dispensers, and compressor stations; mobile hydrogen refueling facilities: such as temporary hydrogen refueling points for hydrogen fuel cell vehicles, adapting to complex outdoor environments; hydrogen pipeline corridors: deploying tracks along long-distance pipelines to achieve continuous leakage monitoring; chemical hydrogen storage bases: used for the safety protection of large hydrogen storage tank groups to cope with the risk of multi-point leakage.

[0042] In this embodiment, the explosion suppression system includes a track 3, explosion suppression units, an inspection device 1, a control center 6, and a fixing device 4. The number of explosion suppression units is at least one, and usually multiple are set.

[0043] The track 3 is deployed along the protected area. In this embodiment, the track 3 is a circular track and surrounds the protected area. In some other embodiments, the shape of the track 3 can be changed according to the actual scenario. For example, if the entire protected area is a rectangular area, the track 3 can be arranged in a grid pattern so that the track 3 can penetrate all areas where the hydrogen energy facilities are located. Of course, the specific layout method of the track 3 can also be other methods as long as it can meet the actual explosion suppression requirements.

[0044] The fixing device 4 is arranged on the protected area. The track 3 is installed on the fixing device 4 and is located on the protected area. In this embodiment, the fixing device 4 is actually a bracket and plays a supporting role. Of course, in some embodiments, the fixing device 4 can be a wall, an iron frame, etc., as long as it can ensure that the track 3 can be stably installed. The fixing device 4 can be independent of the hydrogen energy facilities or a part of the hydrogen energy facilities. The height of the fixing device 4 should ensure that it does not affect the normal use of the hydrogen energy facilities. The fixing device 4 can be a detachable structure, and similarly, the track 3 can also be a detachable track 3, so that the entire system can be reused. The fixing device 4 also needs to have anti-corrosion characteristics in some special scenarios.

[0045] Each explosion suppression unit includes a plurality of nozzles 2, which are dispersedly installed in the protected area. The plurality of nozzles 2 are arranged at equal intervals in a rectangle, and a track 3 is arranged around the plurality of nozzles 2. In this embodiment, the nozzle 2 is a fine water mist nozzle, and can also be an adjustable angle nozzle, which converts the pressurized water flow into fine water mist for directional spraying to dilute the hydrogen concentration and lower the temperature. The number of nozzles 2 should be set according to the size of the area to be protected to ensure that each nozzle 2 can spray sufficiently to reduce the hydrogen concentration in the space where it is located. It should be noted here that in this embodiment, the hydrogen concentration in the air is reduced by spraying, while in some other embodiments, the explosion suppression unit can also adopt other methods to reduce the hydrogen concentration in the air.

[0046] In some embodiments including this embodiment, each explosion suppression unit further includes a water pipe 5, a plurality of solenoid valves 7 and multiple sections of pipelines 8. The plurality of solenoid valves 7 respectively correspond to the plurality of nozzles 2, and the multiple sections of pipelines 8 respectively correspond to the plurality of solenoid valves 7. Each solenoid valve 7 is installed on the corresponding pipeline 8. One end of each pipeline 8 is connected to the corresponding nozzle 2, and the other end is connected to the water pipe 5. The control center 6 drives the corresponding nozzle 2 to spray by controlling the opening and closing of the solenoid valve 7. The water pipe 5 and the pipeline 8 can be integrally formed. The layout of the water pipe 5 should be determined according to the layout of the nozzle 2. High-pressure water is in the water pipe 5 and sprays out from the nozzle 2 when the solenoid valve 7 is opened.

[0047] Each solenoid valve 7 is internally provided with a pressure sensor and a flow meter. The pressure sensor is used to detect the water pressure in the corresponding pipeline 8 in real time, and the flow meter is used to detect the water flow in the corresponding pipeline 8 in real time. The control center 6 is also used to compare the water pressure with a preset pressure, compare the water flow with a preset flow, and dynamically adjust the PWM duty cycle of the solenoid valve 7 through a preset PID algorithm according to the comparison results. Each nozzle 2 is equipped with an explosion-proof WiFi solenoid valve 7 (response time ≤ 200 ms), a pressure sensor and a self-checking circuit, supports dynamic adjustment of the spraying pressure (0.5 - 8 MPa), and only activates the unit closest to the leakage point.

[0048] The inspection device 1 is installed on the track 3 and can move along the direction of the track 3 to form at least one inspection path, while detecting the hydrogen concentration, wind speed, temperature and humidity at each point on the inspection path. In this embodiment, the inspection device 1 includes an inspection vehicle 11, a temperature sensor 12, a humidity sensor 13, a hydrogen concentration sensor 14 and a wind speed sensor 15, which can realize dynamic mobile monitoring and leakage direction tracking. The inspection vehicle 11 is installed on the track 3 and moves along the inspection path. The temperature sensor 12 is installed on the inspection vehicle 11 and is used to detect and obtain the temperature in real time. The humidity sensor 13 is installed on the inspection vehicle 11 and is used to detect and obtain the humidity in real time. The hydrogen concentration sensor 14 is installed on the inspection vehicle 11 and is used to detect and obtain the hydrogen concentration in real time. The wind speed sensor 15 is installed on the inspection vehicle 11 and is used to detect and obtain the wind speed in real time. The control center 6 is installed on the inspection vehicle 11.

[0049] The control center 6 is used to judge whether the hydrogen concentration is greater than a preset concentration. If so, it performs fusion calculation on the hydrogen concentration, wind speed, temperature and humidity, and analyzes and obtains the coordinates and diffusion direction of the leakage point according to the calculation result, and controls the explosion suppression units closest to the leakage point and / or in the diffusion direction to drive the corresponding multiple nozzles 2 to spray. Otherwise, it controls the inspection device 1 to continue periodic inspection on the inspection path. This embodiment accurately locates the leakage point (error ≤ 0.5 m) based on multi-sensor data fusion (Kalman filter + differential algorithm) and generates an explosion suppression instruction. Additionally, in this embodiment, the control center 6 also obtains the spraying time of the corresponding nozzle 2 through the working time of each solenoid valve 7, and judges whether the spraying time exceeds a preset duration. If so, it closes the corresponding solenoid valve 7, otherwise it keeps the corresponding solenoid valve 7 open; each solenoid valve 7 automatically resets to the closed state when the communication with the control center 6 is interrupted, so that the nozzle 2 does not perform spraying work. It should be noted here that in this embodiment, the control center 6 and the inspection device 1 are not subordinate to each other, and in some embodiments, the control center 6 can be embedded in the inspection device 1 to form an inspection device.

[0050] The execution process of the solenoid valve 7 mainly includes the following three aspects.

[0051] The first aspect is the valve body start: The control center 6 sends instructions through a dual channel. After the solenoid valve 7 receives the instructions, the internal coil is energized to generate magnetic force, overcoming the spring resistance to open the valve core. The opening degree of the valve core is controlled by a PWM signal (the duty cycle of 10% - 90% corresponds to the opening degree of 10% - 100%), realizing precise flow regulation.

[0052] The second aspect is the feedback of spraying parameters: The solenoid valve 7 is internally equipped with a pressure sensor (range 0 - 10 MPa) and a flow meter (accuracy ±1%), and the actual spraying parameters are transmitted back in real time. The control center 6 compares the set value with the actual value, and dynamically adjusts the PWM duty cycle through the PID algorithm to ensure spraying stability.

[0053] The third aspect is safety interlock: timeout shutdown: if the spraying continues for more than 120% of the set duration, the solenoid valve 7 is forced to close and a fault alarm is triggered. Power-off protection: when the communication is interrupted, the solenoid valve 7 automatically resets to the closed state to prevent mis-spraying.

[0054] In this embodiment, first, a circular track and explosion suppression units are deployed along the protection area. The inspection device 1 moves periodically along the track 3, and real-time environmental data is collected through the hydrogen concentration, wind speed, temperature and humidity sensors carried. When the detected hydrogen concentration exceeds the standard, the system locates the leakage source and calculates the diffusion direction based on the multi-sensor data fusion algorithm, and sends encrypted control instructions to the explosion suppression unit closest to the leakage point through a wireless network (such as 5G / LoRa). The solenoid valve 7 in the target unit is activated within 200 ms, driving the fine water mist nozzle 2 to spray directionally at the set pressure and flow rate to inhibit the hydrogen accumulation, and at the same time, the spraying state is fed back to the control center 6 in real time. After the concentration drops to the safety threshold, the solenoid valve 7 automatically closes and the system resumes normal inspection.

[0055] It should be noted here that for all the above devices or structures, whether the inspection device 1 moves relative to the track 3 or other relatively fixed structures, it is necessary to ensure that no electrostatic induction occurs to prevent hydrogen explosion caused by electrostatic reaction. Generally speaking, when hydrogen leaks, the explosion suppression unit has already dealt with it, and the hydrogen concentration in the air is relatively low, which can ensure the safety of the whole system.

[0056] Compared with the existing safety protection system for hydrogen refueling stations, the rail-type inspection hydrogen leakage location and directional explosion suppression system for hydrogen energy facilities of the present invention has the following beneficial effects:

[0057] 1. The rail-type inspection hydrogen leakage location and directional explosion suppression system for hydrogen energy facilities, through the periodic inspection of the inspection device 1 on the track 3, detects hydrogen concentration, temperature, humidity, wind speed, etc. during the inspection process. It can detect various data in the whole protection area with a group of sensors in a relatively short time, and judge whether there is hydrogen leakage according to the detected data, and determine the coordinates and diffusion direction of the leakage point. In this way, the control center 6 can locate the leakage point and direct the leakage, so as to control the explosion suppression unit to perform fixed-point and directional explosion suppression, which can not only ensure the success of explosion suppression, but also maximize the use of the water mist sprayed by the nozzle 2, reduce the hydrogen concentration in the air, realize the closed-loop linkage of detection and explosion suppression, and has the advantages of high-efficiency explosion suppression and resource saving. It solves the technical problems of low inspection efficiency, danger and poor explosion suppression effect existing in the existing safety protection of hydrogen refueling stations. The inspection efficiency is significantly improved and accurate explosion suppression can be achieved.

[0058] 2. The rail-mounted inspection hydrogen leakage location and directional explosion suppression system for hydrogen energy facilities uses the inspection vehicle 11 to move on the rail 3, enabling the temperature sensor 12, humidity sensor 13, hydrogen concentration sensor 14, and wind speed sensor 15 to continuously detect in the direction of the rail 3. It can timely collect various data on the inspection path, and through the fusion calculation of the collected data, accurately locate the leakage point and track the diffusion direction, and preferentially activate the explosion suppression unit closest to the leakage point to achieve efficient directional explosion suppression. Moreover, since these sensors are all located on an inspection vehicle 11, integration can be achieved, the structure is simple, the system design is easier to implement, and resources can be saved.

[0059] 3. The rail-mounted inspection hydrogen leakage location and directional explosion suppression system for hydrogen energy facilities can be applied in various scenarios, such as fixed hydrogen refueling stations, mobile hydrogen refueling facilities, hydrogen transmission pipeline corridors, chemical hydrogen storage bases, etc. The usage scenarios are extensive, and the installation and usage costs can be significantly reduced.

[0060] Embodiment 2

[0061] This embodiment provides a method for rail-mounted inspection hydrogen leakage location and directional explosion suppression of hydrogen energy facilities, which is applied to the rail-mounted inspection hydrogen leakage location and directional explosion suppression system in Embodiment 1. Among them, the explosion suppression method includes the following steps.

[0062] (1) Detect the hydrogen concentration, wind speed, temperature, and humidity at each point on the inspection path.

[0063] (2) Judge whether the hydrogen concentration is greater than a preset concentration. If so, perform a fusion calculation on the hydrogen concentration, wind speed, temperature, and humidity, and analyze and obtain the coordinates and diffusion direction of the leakage point according to the calculation results, and control the explosion suppression units closest to the leakage point and / or in the diffusion direction to drive the corresponding multiple nozzles 2 to spray. Otherwise, control the inspection device 1 to continue periodic inspection on the inspection path.

[0064] Embodiment 3

[0065] Please refer to Figure 4 , this embodiment provides a method for rail-mounted inspection hydrogen leakage location and directional explosion suppression of hydrogen energy facilities, which is also applied to the rail-mounted inspection hydrogen leakage location and directional explosion suppression system in Embodiment 1. Among them, the explosion suppression method includes the following steps.

[0066] S1: Start the power supply, and the control center 6 performs self-check (sensors, communication, power), and generates a single-round or multi-round inspection path. The inspection path is generated according to the externally input route or the built-in route.

[0067] S2: The inspection vehicle 11 (cart) moves along the track 3, enabling the inspection device 1 to collect hydrogen concentration, wind speed, temperature, and humidity data in real time.

[0068] S3: Using multi-sensor fusion to calculate the coordinates of the leakage point and the diffusion direction, and determine whether the hydrogen concentration is greater than 1%. If so, execute step S4; otherwise, execute step S2.

[0069] S4: The control center 6 sends instructions through a dual-channel to select the explosion suppression unit closest to the leakage point. After the solenoid valve 7 receives the instructions, the internal coil is energized to generate magnetic force, overcoming the spring resistance to open the valve core and start the high-pressure fine water mist spray.

[0070] S5: Monitor the change in hydrogen concentration and the spray duration in real time, and again determine whether the hydrogen concentration is less than 0.5%. If so, execute step S6; otherwise, determine that the concentration has not decreased and execute step S4.

[0071] S6: Turn off the spray, reset the nozzle 2, and generate an accident report.

[0072] Embodiment 4

[0073] This embodiment provides a rail-type inspection hydrogen leakage positioning and directional explosion suppression system for hydrogen energy facilities. The system adds the function of the control center 6 on the basis of Embodiment 1. The control center 6 is also used to generate real-time data statistical tables and statistical curves for each inspection point on the inspection path according to hydrogen concentration, wind speed, temperature, and humidity, and select corresponding explosion suppression schemes to control the explosion suppression units closest to the leakage point and / or in the diffusion direction according to various preset curves in the preset system library. This embodiment uses the real-time data and historical data of each detection item to generate curves. When the rate of the curve changes suddenly in a short time, it indicates that hydrogen leakage is very likely to occur. At this time, the control center 6 can send an alarm signal and perform pre-processing according to various pre-set plans in the preset system library to avoid the explosion risk caused by further hydrogen leakage.

[0074] Embodiment 5

[0075] This embodiment provides a hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system. Based on Embodiment 1, the explosion suppression unit has an increased structure, that is, the explosion suppression method is increased. In this embodiment, the explosion suppression unit may further include multiple groups of fans. The control center 6 is used to determine whether the hydrogen concentration is greater than a preset concentration. If so, it performs a fusion calculation on the hydrogen concentration, wind speed, temperature, and humidity, and analyzes and obtains the coordinates and diffusion direction of the leakage point according to the calculation results, and controls the explosion suppression unit closest to the leakage point and / or in the diffusion direction to drive multiple groups of fans to blow air, increasing ventilation and blowing away the enriched hydrogen to reduce the hydrogen concentration in the air. Otherwise, it controls the inspection device 1 to continue periodic inspection on the inspection path. In this way, under the dual effects of spraying and ventilation, the rate of decrease in the hydrogen concentration in the air will be faster, especially when a large-scale hydrogen leakage occurs, and the explosion suppression effect is better.

[0076] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system, characterized in that, It includes: Tracks deployed along the protected area; At least one explosion suppression unit, each explosion suppression unit including a plurality of nozzles; the plurality of nozzles are dispersedly installed in the protected area; An inspection device installed on the track and capable of moving along the track direction to form at least one inspection path, and simultaneously detecting the hydrogen concentration, wind speed, temperature, and humidity at each point on the inspection path; A control center for determining whether the hydrogen concentration is greater than a preset concentration. If so, performing a fusion calculation on the hydrogen concentration, the wind speed, the temperature, and the humidity, and analyzing and obtaining the coordinates and diffusion direction of the leakage point according to the calculation result, and controlling the explosion suppression unit closest to the leakage point and / or in the diffusion direction to drive the corresponding plurality of nozzles to spray. Otherwise, controlling the inspection device to continue periodic inspection on the inspection path.

2. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system according to claim 1, characterized in that, The inspection device includes an inspection vehicle, a temperature sensor, a humidity sensor, a hydrogen concentration sensor, and a wind speed sensor; the inspection vehicle is installed on the track and moves along the inspection path; the temperature sensor is installed on the inspection vehicle and is used to detect and obtain the temperature in real time; the humidity sensor is installed on the inspection vehicle and is used to detect and obtain the humidity in real time; the hydrogen concentration sensor is installed on the inspection vehicle and is used to detect and obtain the hydrogen concentration in real time; the wind speed sensor is installed on the inspection vehicle and is used to detect and obtain the wind speed in real time; the control center is installed on the inspection vehicle.

3. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system according to claim 1, characterized in that, Each explosion suppression unit further includes a water pipe, a plurality of electromagnetic valves corresponding to the plurality of nozzles respectively, and a plurality of pipe segments corresponding to the plurality of electromagnetic valves respectively; each electromagnetic valve is installed on the corresponding pipe segment, one end of each pipe segment is connected to the corresponding nozzle, and the other end is connected to the water pipe; the control center drives the corresponding nozzles to spray by controlling the opening and closing of the electromagnetic valves.

4. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system according to claim 3, characterized in that, Each electromagnetic valve is internally provided with a pressure sensor and a flow meter. The pressure sensor is used to detect the water pressure in the corresponding pipe segment in real time, and the flow meter is used to detect the water flow in the corresponding pipe segment in real time; the control center is further used to compare the water pressure with a preset pressure, compare the water flow with a preset flow, and dynamically adjust the PWM duty ratio of the electromagnetic valve through a preset PID algorithm according to the comparison results.

5. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system according to claim 3, characterized in that, The control center also obtains the spraying time of the corresponding nozzles through the working time of each electromagnetic valve, and determines whether the spraying time exceeds a preset duration. If so, closing the corresponding electromagnetic valve, otherwise keeping the corresponding electromagnetic valve open; when the communication between each electromagnetic valve and the control center is interrupted, each electromagnetic valve automatically resets to the closed state, so that the nozzles do not perform spraying work.

6. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system according to claim 1, characterized in that, The plurality of nozzles are arranged at equal intervals in a rectangle, and the track is arranged around the plurality of nozzles.

7. The orbiting inspection hydrogen leakage positioning and directional explosion suppression system for hydrogen energy facilities according to claim 1, wherein The track is a circular track and surrounds the protected area.

8. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system according to claim 1, wherein The control center is further configured to generate a real-time data statistical table and a statistical curve for each inspection point on the inspection path according to the hydrogen concentration, the wind speed, the temperature, and the humidity, and select a corresponding explosion suppression scheme from a variety of preset curves in a preset system library to control the explosion suppression units closest to the leakage point and / or in the diffusion direction.

9. The hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system according to claim 1, characterized in that, The explosion suppression system further includes: A fixing device, which is arranged on the protection area; the track is installed on the fixing device and is located on the protection area.

10. A method for hydrogen leakage location and directional explosion suppression of an orbiting inspection of a hydrogen energy facility, characterized in that, It is applied to the hydrogen energy facility orbital inspection hydrogen leakage positioning and directional explosion suppression system according to any one of claims 1-9; the explosion suppression method includes the following steps: Detect the hydrogen concentration, wind speed, temperature, and humidity at each point on the inspection path. Judge whether the hydrogen concentration is greater than a preset concentration. If so, perform a fusion calculation on the hydrogen concentration, the wind speed, the temperature, and the humidity, and analyze and obtain the coordinates and diffusion direction of the leakage point according to the calculation result, and control the explosion suppression units closest to the leakage point and / or in the diffusion direction to drive the corresponding multiple nozzles to spray. Otherwise, control the inspection device to continue periodic inspection on the inspection path.

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