Mobile multifunctional nitrogen generation equipment and intelligent control system

Abstract

The invention provides mobile multifunctional nitrogen generation equipment and an intelligent control system, the mobile multifunctional nitrogen generation equipment comprises an equipment shell, two sides of the equipment shell are provided with lifting assemblies, and the bottom of the equipment shell is provided with a moving assembly; a first-stage gas compressor, an air cooling module, a liquid cooling module, a water removal module, a nitrogen separation membrane, a pipeline valve integration module and a second-stage gas compressor which are sequentially connected in series are installed in the nitrogen output device, and high-purity low-pressure nitrogen or high-pressure low-purity nitrogen is output. The system further comprises an intelligent pressure control unit, a remote on-line monitoring unit, an intelligent leak detection unit, a predictive maintenance unit and a main control module used for planning all the units to work cooperatively. The equipment is convenient to transport and carry, can generate high-purity nitrogen and high-pressure nitrogen without an excessive pressurization risk, can collect data such as pressure, temperature and flow in real time, and realizes intelligent pressure control and remote monitoring and early warning functions.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen production, and in particular to a mobile multifunctional nitrogen production device and an intelligent control system. Background Art

[0002] A nitrogen generator is a device that uses air as raw material and physically separates oxygen and nitrogen to produce nitrogen. Currently, when nitrogen is filled and pressure-maintained in air-conditioning pipelines or used for welding protection, workers are required to carry bulky and risky high-pressure nitrogen cylinders, which are inconvenient for workers to carry and pose a certain risk.

[0003] High-pressure, low-purity nitrogen is required for nitrogen filling and pressure maintenance operations in air-conditioning pipelines, while low-pressure, high-purity nitrogen is required for welding protection operations. Existing nitrogen cylinders cannot achieve the above pressure and purity switching, and lack monitoring and early warning functions. Summary of the Invention

[0004] In response to the above problems, the present invention provides a mobile multifunctional nitrogen production equipment and an intelligent control system. The equipment is easy to transport and carry, can generate high-purity nitrogen without the risk of over-pressurization, and can also generate high-pressure nitrogen. It can collect data such as pressure, temperature, and flow in real time, and realize intelligent pressure control and remote monitoring and early warning functions.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: A mobile multifunctional nitrogen production device comprises an equipment housing, wherein the equipment housing is provided with a pulling assembly on both sides and a moving assembly at the bottom, and a first-stage gas compressor, an air cooling module, a liquid cooling module, a water removal module, a nitrogen separation membrane, a pipeline valve integrated module and a second-stage gas compressor are installed in series in sequence; The air passes through the first-stage gas compressor, air cooling module, liquid cooling module, water removal module, nitrogen separation membrane and pipeline valve integrated module in sequence to output high-purity low-pressure nitrogen; The air passes through the first-stage gas compressor, air cooling module, liquid cooling module, water removal module, nitrogen separation membrane, pipeline valve integrated module and second-stage gas compressor in sequence to output high-pressure low-purity nitrogen; It also includes a control system, which includes a power supply hardware control unit, a nitrogen generator software control unit, an intelligent pressure control unit, a remote online monitoring unit and an intelligent leak detection unit.

[0006] Preferably, the lifting assembly includes handles fixedly installed on the top of the front and rear sides of the device shell, and the front end of the device shell is also rotatably connected to a pull rod. The moving assembly includes two pairs of moving wheels installed on the bottom of the device shell, the front pair of moving wheels are universal wheels, and the rear pair of moving wheels are directional wheels.

[0007] Preferably, a pair of air suction fans are installed on the rear side of the device housing, and cooling fans are provided on the front side of the device housing, both sides of the device housing and the first-stage gas compressor.

[0008] Preferably, the compressor filter element of the first-stage gas compressor is exposed outside the equipment housing, and the cylinder heads of the air inlet and outlet ends of the second-stage gas compressor are both covered with air guide covers, and a cooling fan is installed at the cover opening of the air guide cover.

[0009] Preferably, the air cooling module consists of a spiral heat dissipation pipeline and an air cooling fan, the air outlet end of the spiral heat dissipation pipeline is also equipped with an air cooling module temperature sensor, and the air outlet end of the liquid cooling module is equipped with a liquid cooling module temperature sensor.

[0010] Preferably, the dehydration module includes an air source dryer, a first-level micron-sized sieve and a second-level nano-sized sieve connected in series in sequence. The cooled compressed air passes through the air source dryer, the first-level micron-sized sieve and the second-level nano-sized sieve in sequence and then outputs dry air. A low-pressure pressure sensor is installed at the air outlet end of the dehydration module.

[0011] Preferably, one end of the nitrogen separation membrane is provided with an oxygen outlet and a nitrogen outlet, and the oxygen outlet is connected to an oxygen storage tank.

[0012] Preferably, the pipeline valve integrated module includes an air intake pipeline, a high-purity low-pressure pipeline, a low-purity high-pressure pipeline, a conversion pipeline, an output pipeline and a detection pipeline. Low-pressure solenoid valves are installed at the connections between the high-purity low-pressure pipeline, the low-purity high-pressure pipeline and the air intake pipeline. A flow regulating valve is connected in series on the high-purity low-pressure pipeline. The high-purity low-pressure pipeline and the conversion pipeline are connected by a connecting pipe. A mesh gas storage pipeline is arranged in the low-purity high-pressure pipeline. An exhaust pipe is passed between the outlet end of the mesh gas storage pipeline and the secondary gas compressor. The high-pressure, low-purity nitrogen output by the secondary gas compressor enters the conversion pipeline through a one-way valve. A pair of first high-pressure solenoid valves are installed on the conversion pipeline. Second high-pressure solenoid valves are installed on the output pipeline and the detection pipeline. A nitrogen outlet is provided at the end of the output pipeline.

[0013] Preferably, a pressure relief valve and a high-pressure pressure sensor are installed on the output pipeline, and a humidity sensor and a nitrogen purity sensor are connected in series on the detection pipeline.

[0014] Preferably, a UI interface and a button / parameter setting function module are installed on the top of the device housing, and the pipeline nitrogen filling pressure value can be set by the user on the UI interface according to manual measurement experience; The remote online monitoring unit automatically collects working hours, nitrogen purity, and humidity dew point parameters during pipeline welding and nitrogen filling and pressure maintenance operations. After completion, it is connected to a smart pressure gauge with 4G positioning function to remotely monitor pipeline pressure anomalies in real time on the Internet of Things platform and issue early warnings; The intelligent leak detection unit can perform negative pressure leak detection on the pipeline after the vacuum operation, or after nitrogen filling and pressure maintenance, collect and calculate data through the pressure sensor combined with the temperature sensor to determine whether there is any abnormal leakage in the pipeline.

[0015] The present invention also provides an intelligent control system for a mobile multifunctional nitrogen generator, comprising an intelligent pressure control unit, a remote online monitoring unit, an intelligent leak detection unit, a predictive maintenance unit, and a main control module for coordinating the coordinated work of each unit, wherein each unit is electrically connected to the main control module; The intelligent pressure control unit includes a parameter input module, a sensor group 1, an algorithm processing module 1 and a pressure regulation execution module, the parameter input module includes a mobile phone APP applet interaction module and a UI interface and a button interaction module, which is used to receive air-conditioning system parameters input by the user or manually set pressure values, the sensor group 1 includes a flow sensor, a pressure sensor and a temperature sensor, which are used to collect gas temperature, ambient temperature and pipeline flow parameters, the algorithm processing module 1 is used to calculate the pipeline capacity and determine the target pressure holding value according to the parameters received by the parameter input module or the parameters collected by the sensor group 1, the pressure regulation execution module is used to control the pressurization action of the nitrogen production equipment according to the target pressure holding value, and automatically stop pressurization when the pressure reaches the target pressure holding value; The remote online monitoring unit includes a 4G positioning module, a data acquisition module, an intelligent pressure gauge communication module, and an Internet of Things platform interaction module. The 4G positioning module is used to obtain the location information of the nitrogen generator. The data acquisition module is used to collect working hours, nitrogen purity, and humidity dew point parameters during pipeline welding and nitrogen filling and pressure maintenance operations. The intelligent pressure gauge communication module is used to establish a communication connection with an intelligent pressure gauge with a 4G positioning function. The Internet of Things platform interaction module is used to upload the collected location information, operating parameters, and pipeline pressure data fed back by the intelligent pressure gauge to the Internet of Things platform, realizing remote real-time monitoring and pressure abnormality warning. The intelligent leak detection unit includes a negative pressure detection module, a second sensor group, and a second algorithm processing module. The negative pressure detection module is used to perform negative pressure leak detection on the pipeline after the vacuum operation. The second sensor group includes a pressure sensor and a temperature sensor, which are used to collect pipeline pressure and ambient temperature data after nitrogen filling and pressure maintenance. The algorithm processing module is used to calculate and analyze the data collected by the second sensor group to determine whether there is any leakage abnormality in the pipeline. The predictive maintenance unit includes a life calibration module, a sensor group three, an abnormality analysis module and an early warning module. The life calibration module is used to calibrate the life parameters of key components and wearing parts of the nitrogen production equipment. The sensor group three includes a pressure sensor, a temperature sensor, a flow sensor, a purity sensor and a humidity sensor, which are used to monitor the working status parameters of each component in real time. The abnormality analysis module is used to analyze and determine abnormal modules and components based on the parameters and life calibration data collected by the sensor group three. The early warning module includes a UI interface prompt module and an Internet of Things platform early warning module, which are used to display abnormal codes through the UI interface and send abnormal early warning information to the Internet of Things platform.

[0016] The beneficial effects of the present invention are: 1. The equipment is designed with 2 universal wheels + 2 fixed wheels + a pull rod, which is easy to move. The front and rear ends are designed with handles with a handle spacing of about 0.6m, which is convenient for one person to carry. The equipment shell and frame are made of light metals such as aluminum alloy or polymer composite materials such as carbon fiber, which greatly reduces the weight of the equipment to less than 50kg. The equipment integrates pipes and valves to greatly reduce the size of the equipment and reduce the weight of the equipment.

[0017] 2. The air passes through a primary gas compressor, air cooling module, liquid cooling module, water removal module, nitrogen separation membrane, and pipeline valve integrated module, outputting high-purity, low-pressure nitrogen. Membrane separation produces high-purity nitrogen with a nitrogen purity of ≥99.5%. The air passes through a primary gas compressor, air cooling module, liquid cooling module, water removal module, nitrogen separation membrane, pipeline valve integrated module, and secondary gas compressor, outputting high-pressure, low-purity nitrogen. The high-pressure unit produces high-pressure nitrogen with a nitrogen purity of ≥85% and a nitrogen pressure of ≥4.5 MPa. The equipment uses multiple condensation methods, including air cooling and liquid cooling modules, to achieve a dew point of -25°C and below -40°C.

[0018] 3. The target pressure can be set through the UI interface and the button / parameter setting function module. When the pressure reaches the set value, the device will automatically stop pressurizing to prevent excessive pressurization from damaging the pipeline, and no staff monitoring is required; the device is equipped with a safety pressure relief valve. When the device loses power or the pressure exceeds the safe range, it will automatically release the pressure to protect the safety of personnel and equipment.

[0019] 4. Nitrogen and oxygen production dual mode, oxygen is stored synchronously during nitrogen production. When the pressure of the oxygen storage tank reaches the set value, it is filled into the oxygen cylinder through the booster.

[0020] 5. The compressor and solenoid valve in the equipment will generate heat. Overheating will greatly reduce the service life of the equipment. By designing the air duct so that the equipment has air intake on one side and air outlet on three sides, and placing the components that generate the most heat at the air outlet, the temperature rise rate of the equipment can be effectively reduced.

[0021] 6. The remote online monitoring unit automatically collects working hours, nitrogen purity, and humidity dew point parameters during pipeline welding and nitrogen filling and pressure maintenance operations. After completion, it is connected to a smart pressure gauge with 4G positioning function to remotely monitor pipeline pressure anomalies in real time and issue early warnings on the Internet of Things platform; the intelligent leak detection unit can perform negative pressure leak detection on the pipeline after vacuuming, and can also collect and calculate data through pressure sensors combined with temperature sensors after nitrogen filling and pressure maintenance to determine whether there are any abnormal leaks in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front perspective view of the present invention; Figure 2 is a rear perspective view of the present invention; Figure 3 A perspective view of the suction fan of the present invention; Figure 4 It is a three-dimensional schematic diagram of the internal structure of the present invention; Figure 5 It is a front view of the present invention; Figure 6 This is a front perspective view of the pipeline valve integrated module proposed by the present invention; Figure 7 This is a rear perspective view of the pipeline valve integrated module proposed by the present invention; Figure 8 This is a cross-sectional view of the low-purity and high-pressure pipeline proposed by the present invention; Figure 9 A three-dimensional diagram of a first-stage gas compressor proposed by the present invention; Figure 10 A three-dimensional diagram of the air-cooling module proposed in the present invention; Figure 11 A three-dimensional diagram of the liquid cooling module proposed in the present invention; Figure 12 A three-dimensional diagram of the water removal module proposed by the present invention; Figure 13 A three-dimensional diagram of the nitrogen separation membrane proposed in the present invention; Figure 14 A three-dimensional diagram of the two-stage gas compressor proposed by the present invention; Figure 15 This is a design process flow chart of the present invention; Figure 16 This is a block diagram of the intelligent control system of the present invention.

[0023] In the figure: 1 equipment housing, 2 UI interface and button / parameter setting function module, 3 pipeline valve integrated module, 31 nitrogen outlet, 32 low purity high pressure pipeline, 33 output pipeline, 34 low pressure solenoid valve, 35 flow control valve, 36 exhaust pipe, 37 connecting pipe, 38 one-way valve, 39 first high pressure solenoid valve, 310 intake pipeline, 311 conversion pipeline, 312 second high pressure solenoid valve, 313 pressure relief valve, 314 detection pipeline, 315 humidity sensor, 316 nitrogen purity sensor, 317 high purity low pressure pipeline, 4 handle, 5 pull rod, 6 moving wheel, 7 suction fan fan, 8 cooling fan, 9 first-stage gas compressor, 91 compressor filter, 10 air cooling module, 101 air cooling module temperature sensor, 11 liquid cooling module, 111 liquid cooling module temperature sensor, 12 dehydration module, 121 gas source dryer, 122 first-stage micron sieve, 123 second-stage nano-sieve, 124 low-pressure pressure sensor, 13 nitrogen separation membrane, 131 nitrogen exhaust port, 132 oxygen exhaust port, 14 power supply hardware control unit, 15 nitrogen generator software control unit, 16 second-stage gas compressor, 161 cooling fan, 162 air guide cover. DETAILED DESCRIPTION

[0024] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Reference Figure 1-15 A mobile multifunctional nitrogen production equipment and intelligent control system includes an equipment shell 1, with pulling components on both sides of the equipment shell 1 and a moving component at the bottom. A first-stage gas compressor 9, an air-cooling module 10, a liquid-cooling module 11, a water removal module 12, a nitrogen separation membrane 13, a pipeline valve integrated module 3 and a second-stage gas compressor 16 are installed in series in sequence.

[0026] Specifically, the lifting assembly includes handles 4 fixedly installed on the top of the front and rear sides of the equipment housing 1. The front end of the equipment housing 1 is also rotatably connected to a pull rod 5. The moving assembly includes two pairs of moving wheels 6 installed at the bottom of the equipment housing 1. The front pair of moving wheels 6 are universal wheels, and the rear pair of moving wheels 6 are fixed wheels. The equipment is easy to move through the design of 2 universal wheels + 2 fixed wheels + pull rods. The front and rear end designs are composed of handles 4, and the distance between the handles 4 is about 0.6m, which is convenient for one person to carry. The equipment housing 1 and the frame are made of light metals such as aluminum alloy or polymer composite materials such as carbon fiber, which greatly reduces the weight of the equipment and makes the equipment weight less than 50kg.

[0027] Furthermore, a pair of intake fans 7 are installed on the rear side of the device housing 1, and cooling fans 8 are installed on the front side, both sides of the device housing 1, and on the first-stage gas compressor 9. The compressor and solenoid valve in the device generate heat, and overheating can significantly reduce the service life of the device. Through the design of the air duct, the device is inlet from a single side through the intake fan 7 and outlet from three sides through the cooling fan 8. The high-heat-generating components are arranged at the air outlet, which effectively reduces the temperature rise rate of the device.

[0028] Furthermore, the compressor filter element 91 of the first-stage gas compressor 9 is exposed outside the equipment housing 1 for easy replacement. The air inlet and outlet cylinder heads of the second-stage gas compressor 16 are both covered with an air guide cover 162, and a cooling fan 161 is installed at the cover opening of the air guide cover 162.

[0029] Specifically, the air cooling module 10 is composed of a spiral heat dissipation pipe and an air cooling fan. The air outlet end of the spiral heat dissipation pipe is also equipped with an air cooling module temperature sensor 101. The air outlet end of the liquid cooling module 11 is equipped with a liquid cooling module temperature sensor 111. The dehydration module 12 includes an air source dryer 121, a first-level micron-level sieve 122 and a second-level nano-level sieve 123 connected in series. The cooled compressed air passes through the air source dryer 121, the first-level micron-level sieve 122 and the second-level nano-level sieve 123 in sequence and then outputs dry air. A low-pressure pressure sensor 124 is installed at the air outlet end of the dehydration module 12. The model of the temperature sensor is RS485. The equipment uses multiple condensation of the air cooling module + liquid cooling module to make the dew point of the output nitrogen reach -25°C and below -40°C.

[0030] Furthermore, one end of the nitrogen separation membrane 13 is provided with an oxygen outlet 132 and a nitrogen outlet 131. The oxygen outlet 132 is connected to the oxygen storage tank to store oxygen simultaneously when nitrogen is produced. When the pressure of the oxygen storage tank reaches a set value, the oxygen cylinder is filled with oxygen through a booster.

[0031] Specifically, the pipeline valve integrated module 3 includes an intake pipeline 310, a high-purity low-pressure pipeline 317, a low-purity high-pressure pipeline 32, a conversion pipeline 311, an output pipeline 33 and a detection pipeline 314. A low-pressure solenoid valve 34 is installed at the connection between the high-purity low-pressure pipeline 317, the low-purity high-pressure pipeline 32 and the intake pipeline 310. A flow regulating valve 35 is connected in series on the high-purity low-pressure pipeline 317. The high-purity low-pressure pipeline 317 and the conversion pipeline 311 are connected by a connecting pipe 37. A mesh gas storage pipeline is arranged in the low-purity and high-pressure pipeline 32. An exhaust pipe 36 is passed between the gas outlet end of the mesh gas storage pipeline and the secondary gas compressor 16. The high-pressure, low-purity nitrogen gas output by the secondary gas compressor 16 enters the conversion pipeline 311 through a one-way valve 38. A pair of first high-pressure solenoid valves 39 are installed on the conversion pipeline 311. A second high-pressure solenoid valve 312 is installed on both the output pipeline 33 and the detection pipeline 314. A nitrogen outlet 31 is provided at the end of the output pipeline 33.

[0032] Furthermore, a pressure relief valve 313 and a high-pressure pressure sensor are installed on the output pipeline 33, and a humidity sensor 315 and a nitrogen purity sensor 316 are connected in series to the detection pipeline 314. When it is necessary to detect the purity and humidity of the output nitrogen, it is only necessary to open the corresponding second high-pressure solenoid valve 312 to allow part of the gas to enter the detection pipeline 314, and then detect the purity and humidity respectively through the humidity sensor 315 and the nitrogen purity sensor 316.

[0033] Reference Figure 16 The present invention also provides an intelligent control system for a mobile multifunctional nitrogen generating equipment, comprising an intelligent pressure control unit, a remote online monitoring unit, an intelligent leak detection unit, a predictive maintenance unit, and a main control module for coordinating the coordinated work of each unit, wherein each unit is electrically connected to the main control module; The intelligent pressure control unit includes a parameter input module, a sensor group 1, an algorithm processing module 1 and a pressure regulation execution module. The parameter input module includes a mobile phone APP applet interaction module and a UI interface and a button interaction module, which is used to receive air-conditioning system parameters input by the user or manually set pressure values. The sensor group 1 includes a flow sensor, a pressure sensor and a temperature sensor, which are used to collect gas temperature, ambient temperature and pipeline flow parameters. The algorithm processing module 1 is used to calculate the pipeline capacity and determine the target pressure holding value based on the parameters received by the parameter input module or the parameters collected by the sensor group 1. The pressure regulation execution module is used to control the pressurization action of the nitrogen production equipment according to the target pressure holding value, and automatically stop pressurization when the pressure reaches the target pressure holding value; The remote online monitoring unit includes a 4G positioning module, a data acquisition module, an intelligent pressure gauge communication module, and an IoT platform interaction module. The 4G positioning module is used to obtain the location information of the nitrogen generator. The data acquisition module is used to collect working hours, nitrogen purity, and humidity dew point parameters during pipeline welding and nitrogen filling and pressure maintenance operations. The intelligent pressure gauge communication module is used to establish a communication connection with an intelligent pressure gauge with 4G positioning function. The IoT platform interaction module is used to upload the collected location information, operating parameters, and pipeline pressure data fed back by the intelligent pressure gauge to the IoT platform, realizing remote real-time monitoring and pressure anomaly warning. The intelligent leak detection unit includes a negative pressure detection module, a second sensor group, and a second algorithm processing module. The negative pressure detection module is used to perform negative pressure leak detection on the pipeline after vacuum operation. The second sensor group includes a pressure sensor and a temperature sensor, which are used to collect pipeline pressure and ambient temperature data after nitrogen filling and pressure maintenance. The algorithm processing module is used to calculate and analyze the data collected by the second sensor group to determine whether there is any leakage abnormality in the pipeline. The predictive maintenance unit includes a life calibration module, a sensor group three, an abnormality analysis module and an early warning module. The life calibration module is used to calibrate the life parameters of key components and wearing parts of the nitrogen production equipment. The sensor group three includes a pressure sensor, a temperature sensor, a flow sensor, a purity sensor and a humidity sensor, which are used to monitor the working status parameters of each component in real time. The abnormality analysis module is used to analyze and determine abnormal modules and components based on the parameters and life calibration data collected by the sensor group three. The early warning module includes a UI interface prompt module and an IoT platform early warning module, which are used to display abnormal codes through the UI interface and send abnormal early warning information to the IoT platform.

[0034] The intelligent pressure control unit is the core module for precise nitrogen filling and pressure maintenance. By combining hardware sensors with software algorithms, it adapts to pressure control requirements in different scenarios, including: 1. Parameter input module This module supports two parameter input methods: Mobile APP mini-program interaction: Users can input parameters such as the air conditioning system size (such as pipe length and volume) and the number of indoor units through the mobile APP. After clicking "Nitrogen filling and pressure maintenance", the parameters are transmitted to the equipment control system via wireless communication; UI interface and button interaction: The UI interface and button / parameter setting function module 2 on the top of the device shell can directly receive the pipeline nitrogen filling pressure value manually input by the user, which is suitable for scenarios where the user sets the pressure based on experience.

[0035] 2. Sensor Group 1 It consists of a flow sensor installed in the pipeline valve integrated module 3, a high-pressure pressure sensor (on the output pipeline 33) and an ambient temperature sensor. It can collect gas temperature (nitrogen temperature flowing through the pipeline), ambient temperature (equipment operating environment temperature) and pipeline flow parameters in real time, providing basic data for pipeline capacity calculation.

[0036] 3. Algorithm processing module 1 Based on the built-in algorithm of the nitrogen generator software control unit 15, this module can calculate the pipeline capacity based on input parameters or sensor data: If system parameters are entered through the mobile app or UI, the algorithm directly matches the preset "system size-capacity-pressure holding value" correspondence to determine the target pressure holding value range (for example, the pressure holding value for a small air conditioning system is 1.5MPa, and for a large system it is 2.0MPa); If data is collected through sensor group 1, the pipeline must first be evacuated by a vacuum pump and then filled with nitrogen to atmospheric pressure. The algorithm combines the ideal gas state equation (PV=nRT) to calculate the actual volume of the pipeline based on flow, pressure, and temperature parameters, and then determines the appropriate pressurization pressure value (for example, a 5L pipeline corresponds to a pressure holding value of 1.8MPa).

[0037] 4. Pressure regulation execution module The system works in conjunction with the first-stage gas compressor 9, the second-stage gas compressor 16, and the low-pressure solenoid valve 34 and the first high-pressure solenoid valve 39 in the pipeline valve integrated module 3. If the pipeline pressure falls below the target pressure, the compressor is started and the corresponding solenoid valve is opened to maintain pressure. If the high-pressure sensor detects that the pressure has reached the target, the compressor is immediately shut down and the solenoid valve is closed, halting pressurization to prevent damage to the pipeline caused by excessive pressure. Furthermore, the pressure relief valve 313 on the output pipeline 33 serves as hardware redundancy. If the pressure exceeds a safe range (e.g., 1.2 times the target value), it automatically releases pressure to ensure safety.

[0038] The remote online monitoring unit uses IoT technology to achieve remote visual management of equipment status and operating data. Its specific implementation relies on the collaborative interaction between hardware modules and the platform: 1.4G positioning module Integrated into the device control system, it can obtain the device's geographic location information in real time, allowing users to view device distribution and movement trajectories through the IoT platform. It is suitable for scenarios where multiple devices work together.

[0039] 2. Data acquisition module The system works in conjunction with the nitrogen purity sensor 316 and humidity sensor 315 on the detection line 314 and the timing module built into the device to automatically collect the following parameters: Working hours: the duration from the start of nitrogen production to the stop of the equipment; Nitrogen purity: Detected by nitrogen purity sensor 316, with an accuracy of ±0.1%; Humidity dew point: Detected by humidity sensor 315, it can reflect the dryness of nitrogen (such as dew point ≤ -25℃).

[0040] 3. Intelligent pressure gauge communication module By using wireless communication protocols (such as Bluetooth or LoRa) to establish a connection with an external smart pressure gauge with 4G positioning function, the pipeline pressure data fed back by the pressure gauge (such as the pressure change curve during the pressure maintenance process) can be received in real time.

[0041] 4. IoT platform interaction module The location information obtained by the 4G positioning module, the operating parameters collected by the data acquisition module, and the pressure data of the smart pressure gauge are uploaded to the IoT platform via the 4G network. The platform can store and analyze the data and trigger warnings in the following scenarios: Abnormal pipeline pressure: if the pressure drop rate exceeds 0.05MPa / h during the pressure maintenance process (preset according to industry standards); Device offline: The device has not uploaded data to the platform for more than 24 hours; Nitrogen purity / humidity does not meet the standards: for example, the purity is lower than 99.5% (for welding protection) or 85% (for nitrogen filling and pressure maintenance).

[0042] The intelligent leak detection unit accurately determines pipeline leaks through negative pressure detection and pressure-temperature correlation analysis, including: 1. Negative pressure detection module In conjunction with the vacuum pump (external device), after the pipeline is evacuated to -0.1MPa, the vacuum pump and pipeline valve are closed, and the pipeline pressure change is monitored through the low-pressure pressure sensor 124: if the pressure rises by more than 0.02MPa within 1 hour, it is determined to be a negative pressure leak (such as loose pipeline interface causing air infiltration), and a "negative pressure leak" prompt is displayed on the UI interface.

[0043] 2. Sensor Group 2 It consists of a high-pressure pressure sensor and an ambient temperature sensor in the pipeline valve integrated module 3. After nitrogen filling and pressure maintenance (such as the pressure maintenance value is 2.0MPa), it continuously collects pipeline pressure (accuracy ±0.01MPa) and ambient temperature (accuracy ±0.5℃) at a frequency of once every 10 minutes.

[0044] 3. Algorithm processing module 2 Based on the leakage judgment algorithm of the nitrogen generator software control unit 15, combined with the following logical analysis: First, the effect of temperature on pressure is corrected according to the ideal gas law: if the ambient temperature changes by ΔT (e.g., from 25°C to 30°C), the theoretical pressure change ΔP is calculated as ΔP = P0 × ΔT / T0 (P0 is the initial holding pressure value, T0 is the initial absolute temperature); Compare the actual pressure change ΔPactual with ΔPtheoretical: If the absolute value of ΔPactual - ΔPtheoretical exceeds 0.03MPa / 24h, it is determined that there is a leak in the pipeline (such as nitrogen leakage caused by weld defects), and the leakage warning and pressure change curve are displayed on the UI interface.

[0045] The predictive maintenance unit provides early warning of failure risks through condition monitoring and life analysis of key equipment components. The specific implementation is as follows: 1. Life calibration module Preset life parameters for equipment wearing parts (such as the first-stage gas compressor filter element 91, nitrogen separation membrane 13, and solenoid valve core): Compressor filter element 91: lifespan is 500 hours (accumulated working time); Nitrogen separation membrane 13: lifespan is 10,000 hours (cumulative nitrogen production time); Solenoid valve (such as low-pressure solenoid valve 34): The service life is 10,000 switching operations.

[0046] 2. Sensor group three Distributed in key components of the equipment: Pressure sensor: monitors the inlet and outlet pressures of the first / secondary gas compressor; Temperature sensors: including air cooling module temperature sensor 101 and liquid cooling module temperature sensor 111, monitoring the temperature of the heat dissipation system; Flow sensor: monitors nitrogen flow in the pipeline; Purity sensor 316 and humidity sensor 315: indirectly reflect the filtration efficiency of the nitrogen separation membrane 13.

[0047] Abnormal analysis module The sensor data is analyzed based on the fault diagnosis algorithm of the nitrogen generator software control unit 15: If the pressure difference between the inlet and outlet of the compressor exceeds the preset value (e.g. the normal pressure difference of a first-stage compressor is 0.5 MPa, but the actual pressure difference is 1.0 MPa), combined with the accumulated working time, it is determined that the filter element is clogged; If the nitrogen purity is continuously lower than 99.5% (in high-purity mode) and the separation membrane has been operating for nearly 10,000 hours, the separation membrane is considered to be aged. If the solenoid valve switch response time exceeds 0.5 seconds (normal is 0.2 seconds), combined with the number of switches, it is determined that the valve core is worn.

[0048] 3. Early warning module UI interface prompt: The UI interface on the top of the device housing displays an abnormality code (such as "E01" for filter element blockage and "E02" for separation membrane aging), along with brief treatment suggestions (such as "Please replace the compressor filter"); IoT platform early warning: Upload abnormal information (including abnormal components, cumulative working time, and sensor data) to the IoT platform, and the platform will push notifications to device managers via SMS or APP to facilitate timely maintenance.

[0049] The main control module is centered around the nitrogen generator software control unit 15, which implements electrical connections and coordinated scheduling with each unit through the power hardware control unit 14: Receive target pressure instructions from the intelligent pressure control unit and synchronously control the actions of the compressor and valves; Coordinate the data collection sequence between the remote online monitoring unit and the intelligent leak detection unit (e.g., prioritize pressure data collection during the pressure holding phase while performing leak detection simultaneously); Integrate abnormal information of predictive maintenance units and output warnings simultaneously on the UI interface and IoT platform; Ensure the adaptability of each unit of the equipment under different working modes (high purity low pressure, low purity high pressure) to ensure stable operation of the system.

[0050] The manufacturing principle of high-purity low-pressure nitrogen: the first-stage gas compressor 9 sucks in air and outputs compressed air. The compressed air passes through the air cooling module 10, and liquid water is produced after the gas is cooled, and the moisture in the gas is separated. The compressed air passes through the liquid cooling module 11, and the gas is further cooled and more liquid water is produced, so that the moisture in the gas is fully separated. The cooled compressed air enters the water removal module 12, and the separated moisture is discharged from the pipeline and the dry air is output. The dry air enters the nitrogen separation membrane 13, and high-concentration nitrogen is output from the nitrogen outlet 131. The separated oxygen is output from the oxygen outlet 132, and the high-concentration nitrogen enters the air inlet pipe 310. By opening the corresponding low-pressure solenoid valve 34, the gas enters the high-purity low-pressure pipe 317. The flow rate is adjusted by the flow control valve 35 to improve the purity. The output high-purity nitrogen enters the conversion pipe 311 through the connecting pipe 37. By opening the corresponding first high-pressure solenoid valve 39 and the second high-pressure solenoid valve 312, the nitrogen can pass through the output pipe 33 and finally be discharged through the nitrogen outlet 31. The nitrogen purity is ≥99.5%, which is suitable for welding protection operations.

[0051] Principle of low-purity and high-pressure nitrogen production: The first-stage gas compressor 9 inhales air and outputs compressed air. The compressed air passes through the air-cooling module 10. Liquid water is produced after the gas is cooled, and the moisture in the gas is separated. The compressed air passes through the liquid-cooling module 11, and the gas is further cooled and more liquid water is produced, so that the moisture in the gas is fully separated. The cooled compressed air enters the dehydration module 12, and the separated moisture is discharged from the pipeline, and dry air is output. The dry air enters the nitrogen separation membrane 13, and high-concentration nitrogen is output from the nitrogen outlet 131. The nitrogen produced by the nitrogen separation membrane 13 enters the low-purity and high-pressure pipeline 32. The mesh-type gas storage pipeline can store nitrogen so that the amount of gas entering the compressor is sufficient. It enters the second-stage gas compressor 16 through the exhaust pipe 36. After outputting high-pressure nitrogen, it passes through the one-way valve 38 and enters the conversion pipeline 311, which can pass through the output pipeline 33 and finally be discharged through the nitrogen outlet 31. The nitrogen purity is ≥85%, and the nitrogen pressure is ≥4.5MPa, which can be used for nitrogen filling and pressure maintenance operations.

[0052] To detect the purity and humidity of the output nitrogen, it is only necessary to open the corresponding second high-pressure solenoid valve 312 to allow part of the gas to enter the detection pipeline 314, and detect the purity and humidity through the humidity sensor 315 and the nitrogen purity sensor 316 respectively.

[0053] This equipment also has obvious advantages in energy saving and consumption reduction: 1. Reduced carbon emissions from transportation Case data: When an average of 50 bottles of nitrogen are used per month, the original transportation consumes 500L of diesel (equivalent to 1.34 tons of CO2). The mobile nitrogen generator only consumes 1 / 3 of the traditional energy consumption to produce nitrogen, saving more than 1 ton of carbon per month.

[0054] 2. Improved gas utilization Traditional bottled nitrogen has 10%-15% gas waste and there is a risk of leakage during transportation; mobile nitrogen generators are ready for use immediately, with a gas utilization rate of over 98%.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mobile multifunctional nitrogen production device, comprising a device housing (1), characterized in that: The device housing (1) is provided with lifting components on both sides and a moving component at the bottom, and is internally installed with a first-stage gas compressor (9), an air cooling module (10), a liquid cooling module (11), a water removal module (12), a nitrogen separation membrane (13), a pipeline valve integrated module (3) and a second-stage gas compressor (16) connected in series in sequence; The air passes through the first-stage gas compressor (9), the air cooling module (10), the liquid cooling module (11), the water removal module (12), the nitrogen separation membrane (13) and the pipeline valve integrated module (3) in sequence to output high-purity low-pressure nitrogen; The air passes through the first-stage gas compressor (9), the air cooling module (10), the liquid cooling module (11), the water removal module (12), the nitrogen separation membrane (13), the pipeline valve integrated module (3) and the second-stage gas compressor (16) in sequence, and then outputs high-pressure low-purity nitrogen; It also includes a control system, which includes a power supply hardware control unit (14), a nitrogen generator software control unit (15), an intelligent pressure control unit, a remote online monitoring unit, and an intelligent leak detection unit.

2. A mobile multifunctional nitrogen production equipment according to claim 1, characterized in that: The lifting assembly includes handles (4) fixedly mounted on the top of the front and rear sides of the device housing (1), and the front end of the device housing (1) is also rotatably connected to a pull rod (5). The moving assembly includes two pairs of moving wheels (6) mounted on the bottom of the device housing (1), the front pair of moving wheels (6) are universal wheels, and the rear pair of moving wheels (6) are fixed wheels.

3. The mobile multifunctional nitrogen production equipment according to claim 1, characterized in that: A pair of air suction fans (7) are installed on the rear side of the device housing (1), and cooling fans (8) are installed on the front side of the device housing (1), both sides of the device housing (1) and the first-stage gas compressor (9).

4. The mobile multifunctional nitrogen production equipment according to claim 1, characterized in that: The compressor filter element (91) of the first-stage gas compressor (9) is exposed outside the equipment housing (1), and the cylinder heads of the air inlet and air outlet ends of the second-stage gas compressor (16) are both covered with air guide covers (162), and a heat dissipation fan (161) is installed at the cover opening of the air guide cover (162).

5. The mobile multifunctional nitrogen production equipment according to claim 1, characterized in that: The air cooling module (10) is composed of a spiral heat dissipation pipeline and an air cooling fan. The air outlet end of the spiral heat dissipation pipeline is also installed with an air cooling module temperature sensor (101), and the air outlet end of the liquid cooling module (11) is installed with a liquid cooling module temperature sensor (111).

6. The mobile multifunctional nitrogen production equipment according to claim 1, characterized in that: The dewatering module (12) comprises an air source dryer (121), a first-level micron-sized sieve (122), and a second-level nano-sized sieve (123) connected in series. The compressed air after cooling passes through the air source dryer (121), the first-level micron-sized sieve (122), and the second-level nano-sized sieve (123) in sequence, and then outputs dry air. A low-pressure pressure sensor (124) is installed at the air outlet of the dewatering module (12).

7. The mobile multifunctional nitrogen production equipment according to claim 1, characterized in that: One end of the nitrogen separation membrane (13) is provided with an oxygen outlet (132) and a nitrogen outlet (131), and the oxygen outlet (132) is connected to an oxygen storage tank.

8. The mobile multifunctional nitrogen production equipment according to claim 1, characterized in that: The pipeline valve integrated module (3) includes an intake pipeline (310), a high-purity low-pressure pipeline (317), a low-purity high-pressure pipeline (32), a conversion pipeline (311), an output pipeline (33) and a detection pipeline (314). A low-pressure solenoid valve (34) is installed at the connection between the high-purity low-pressure pipeline (317), the low-purity high-pressure pipeline (32) and the intake pipeline (310). A flow regulating valve (35) is connected in series to the high-purity low-pressure pipeline (317). The high-purity low-pressure pipeline (317) and the conversion pipeline (311) are connected by a connecting pipe (37). A mesh gas storage pipeline is arranged inside the low-purity and high-pressure pipeline (32), and an exhaust pipe (36) is connected between the gas outlet end of the mesh gas storage pipeline and the secondary gas compressor (16). The high-pressure low-purity nitrogen gas output by the secondary gas compressor (16) enters the conversion pipeline (311) through a one-way valve (38). A pair of first high-pressure solenoid valves (39) are installed on the conversion pipeline (311). A second high-pressure solenoid valve (312) is installed on both the output pipeline (33) and the detection pipeline (314). A nitrogen gas outlet (31) is provided at the end of the output pipeline (33).

9. The mobile multifunctional nitrogen production equipment according to claim 8, characterized in that: A pressure relief valve (313) and a high-pressure pressure sensor are installed on the output pipeline (33), and a humidity sensor (315) and a nitrogen purity sensor (316) are connected in series on the detection pipeline (314).

10. An intelligent control system for a mobile multifunctional nitrogen generating equipment, applied to the mobile multifunctional nitrogen generating equipment according to any one of claims 1 to 9, characterized in that: It includes an intelligent pressure control unit, a remote online monitoring unit, an intelligent leak detection unit, a predictive maintenance unit, and a main control module for coordinating the collaborative work of each unit. Each unit is electrically connected to the main control module; The intelligent pressure control unit includes a parameter input module, a sensor group 1, an algorithm processing module 1 and a pressure regulation execution module, the parameter input module includes a mobile phone APP applet interaction module and a UI interface and a button interaction module, which is used to receive air-conditioning system parameters input by the user or manually set pressure values, the sensor group 1 includes a flow sensor, a pressure sensor and a temperature sensor, which are used to collect gas temperature, ambient temperature and pipeline flow parameters, the algorithm processing module 1 is used to calculate the pipeline capacity and determine the target pressure holding value according to the parameters received by the parameter input module or the parameters collected by the sensor group 1, the pressure regulation execution module is used to control the pressurization action of the nitrogen production equipment according to the target pressure holding value, and automatically stop pressurization when the pressure reaches the target pressure holding value; The remote online monitoring unit includes a 4G positioning module, a data acquisition module, an intelligent pressure gauge communication module, and an Internet of Things platform interaction module. The 4G positioning module is used to obtain the location information of the nitrogen generator. The data acquisition module is used to collect working hours, nitrogen purity, and humidity dew point parameters during pipeline welding and nitrogen filling and pressure maintenance operations. The intelligent pressure gauge communication module is used to establish a communication connection with an intelligent pressure gauge with a 4G positioning function. The Internet of Things platform interaction module is used to upload the collected location information, operating parameters, and pipeline pressure data fed back by the intelligent pressure gauge to the Internet of Things platform, realizing remote real-time monitoring and pressure abnormality warning. The intelligent leak detection unit includes a negative pressure detection module, a second sensor group, and a second algorithm processing module. The negative pressure detection module is used to perform negative pressure leak detection on the pipeline after the vacuum operation. The second sensor group includes a pressure sensor and a temperature sensor, which are used to collect pipeline pressure and ambient temperature data after nitrogen filling and pressure maintenance. The algorithm processing module is used to calculate and analyze the data collected by the second sensor group to determine whether there is any leakage abnormality in the pipeline. The predictive maintenance unit includes a life calibration module, a sensor group three, an abnormality analysis module and an early warning module. The life calibration module is used to calibrate the life parameters of key components and wearing parts of the nitrogen production equipment. The sensor group three includes a pressure sensor, a temperature sensor, a flow sensor, a purity sensor and a humidity sensor, which are used to monitor the working status parameters of each component in real time. The abnormality analysis module is used to analyze and determine abnormal modules and components based on the parameters and life calibration data collected by the sensor group three. The early warning module includes a UI interface prompt module and an Internet of Things platform early warning module, which are used to display abnormal codes through the UI interface and send abnormal early warning information to the Internet of Things platform.

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