Plateau oxygen production shelter control terminal and control method thereof

Abstract

The invention belongs to the technical field of oxygen production, and discloses a plateau oxygen production shelter control terminal which comprises an oxygen production control system, a pressurization filling system and an electrical control system. The oxygen generation control system is used for controlling the air compression and cold drying all-in-one machine, the air buffer tank, the oxygen generator, the oxygen buffer tank and the oxygen quality detector; the electrical control system is used for controlling the generator unit, the oxygen production control box and the distribution box and monitoring load conditions; the pressurization filling system is used for controlling an oxygen compressor and monitoring a high-pressure filling gas circuit. Information of all the functional modules is controlled separately, control instructions are concentrated, and the system is suitable for control and expansion of a complex system. Source limitation is carried out on high-risk behaviors such as high-voltage operation, and equipment damage and even personnel damage caused by misoperation and high-voltage operation are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of oxygen production, and in particular relates to a plateau oxygen production terminal system and a control method thereof. Background Art

[0002] The combat environment in plateau areas is harsh, and hypoxia affects human functions and metabolism and causes damage, which is the primary factor of non-combat casualties in combat in plateau areas.

[0003] The existing oxygen production support cabin is assembled with independent equipment. Each device is relatively independent, with poor information exchange and complicated operation. There are many high-pressure and low-pressure gas valves, which require manual monitoring of the status and control of opening and closing. It is impossible to achieve direct control in the oxygen inhalation cabin. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing oxygen production support cabin has poor information interactivity and complex operation.

[0005] In order to solve the above technical problems, the specific technical solutions of the present invention are as follows:

[0006] A plateau oxygen production cabin control terminal, including an oxygen production control system, a pressurized filling system, and an electrical control system;

[0007] The oxygen production control system is used to control the air compressor and refrigeration dryer, air buffer tank, oxygen generator, oxygen buffer tank, and oxygen quality detector;

[0008] The electrical control system is used to control the generator set, oxygen production control box, distribution box and monitor the load conditions;

[0009] The pressurized filling system is used to control the oxygen compressor and monitor the high-pressure filling gas line.

[0010] Furthermore, the oxygen production control system monitors the status of relevant equipment of the oxygen production system through PLC serial port communication, and coordinates the working mode of each equipment according to the acquired equipment information and environmental information.

[0011] A control method for a plateau oxygen production cabin comprises the following steps:

[0012] Step 1: Start the generator and perform a power-on self-test. If there is any equipment failure information, go to step 2. If the equipment status is normal, go to step 5.

[0013] Step 2: Disable the air compressor, start the oxygen generator, and determine whether the intermediate pressure unit is overloaded. If so, go to step 3; if not, go to step 4.

[0014] Step 3: Open the pressure relief valves of the intermediate and terminal pressure vessels, trigger a fault alarm, and notify personnel to handle the problem after the pressure vessel is depressurized.

[0015] Step 4: The fault alarm is issued and personnel are notified to handle the problem;

[0016] Step 5: Select the working mode, oxygen generation mode, go to step 6, filling mode and oxygen inhalation mode, go to step 13;

[0017] Step 6: Determine whether the filling end of the oxygen storage cylinder is open. If not, go to step 7; if open, go to step 8.

[0018] Step 7: The oxygen concentrator stops and starts, and the relevant port control buttons light up red. After correct operation, go to step 6;

[0019] Step 8: Perform oxygen production and monitor in real time whether the oxygen concentration in the oxygen concentrator meets the standard. If the oxygen concentration meets the standard, proceed to step 9.

[0020] Step 9: Open the oxygen cylinder inlet, close the oxygen inhalation and filling control valves, the front button lights up red, and go to step 10;

[0021] Step 10: Determine whether the oxygen inhalation branch and the filling branch are closed. If closed, go to step 11; if not closed, go to step 9;

[0022] Step 11: Pour oxygen into the oxygen storage cylinder and monitor whether the oxygen storage cylinder is full. If it is full, go to step 12; if not, continue with step 11.

[0023] Step 12: Oxygen production stops, oxygen inhalation and filling control are released, and the process ends;

[0024] Step 13: Determine whether the oxygen production process is in progress. If yes, proceed to step 14; if not, proceed to step 15.

[0025] Step 14: The button is locked, the process is prohibited from starting, a prompt is given to wait or turn off the oxygen generator, and go to step 13;

[0026] Step 15: Determine whether the output end of the oxygen storage cylinder is open, if yes, proceed to step 16, otherwise proceed to step 14;

[0027] Step 16: The oxygen / filling button can be selected and go to step 17;

[0028] Step 17: When oxygen inhalation / filling is completed and closed, determine whether to close the oxygen storage tank output. If yes, go to step 18; otherwise, go to step 19.

[0029] Step 18: The button is locked, the process is prohibited from starting, the front button lights up red, and go to step 17;

[0030] Step 19: Allow the oxygen inhalation / filling stop button to be selected and the process ends.

[0031] The present invention offers the following advantages: The high-altitude oxygen production terminal system and control method offer low operational complexity, high safety, real-time monitoring of equipment status, and separate fault alarm logs. Separate control of information from each functional module and centralized control instructions facilitate the control and expansion of complex systems. This system also mitigates high-risk behaviors such as high-pressure operations, reducing equipment and even personal injury caused by misoperation and high-pressure operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is the main functional architecture of the oxygen production control system of the present invention.

[0033] Figure 2 It is the display screen of the integrated display and control terminal of the oxygen production control system of the present invention.

[0034] Figure 3 It is the comprehensive display and control terminal circuit interface of the oxygen production control system of the present invention.

[0035] Figure 4 It is the hardware architecture of the comprehensive display and control terminal.

[0036] Figure 5 This is the oxygen production system control logic of the present invention.

[0037] Figure 6 This is the control process of the control system of the present invention. DETAILED DESCRIPTION

[0038] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0039] This embodiment provides an oxygen production control system, control terminal and control method for a plateau oxygen production cabin, including an oxygen production control system, a pressurized filling system, an electrical control system, an environmental monitoring system, etc. Figure 1 As shown in the figure, this control method divides all controlled units into three categories according to their functions. Each module is controlled by the PLC control core, and the display and control terminal itself and the PLC module exchange control signals through the TCP protocol to achieve high and low voltage signal separation. At the same time, the PLC control module reserves a PLC control interface for large high voltage equipment access and an RS485 communication control interface for low voltage small electronic equipment. Figure 2 As shown in the figure, the front of the display and control terminal includes a display screen, a physical power switch, and a physical page switching switch. Figure 3 As shown, 1 is the oxygen terminal power supply interface, which inputs 24VDC voltage. 2 is the CAN bus communication interface, which supports dual-channel CAN communication. 3 is the RS485 communication interface, which connects to external temperature sensors, humidity sensors, oxygen concentration sensors, and particle size sensors to obtain environmental information within the oxygen inhalation cabin. 4 is the network interface, which connects to the PLC control module and surveillance cameras.

[0040] The following combination Figure 3 The workflow of this system is described in detail.

[0041] Operating condition one is mains power or other external power supply. In this mode, the integrated display and control terminal is directly activated. All devices power on and enter standby mode, not operating. The system enters a self-test, and the PLC control module starts. The integrated display and control terminal sends a status check signal to the PLC, which broadcasts and receives the returned data packet to all mounted devices. The integrated display and control terminal parses the data packet, checks the device status, and displays it on the screen. If the self-test is normal, all control buttons are enabled. Program restrictions require turning on the air compressor and refrigeration dryer to increase the air pressure to 0.8 MPa. The compressed air is then transferred via a gas pipeline to the internal freeze-drying module, which dries and purifies the moisture in the air. The resulting refrigerated, dry compressed air is then transferred via a gas pipeline to the air buffer tank. The air buffer tank is equipped with a pressure gauge, safety valve, and drain valve. The pressure gauge monitors the pressure in the air buffer tank in real time and generates an alarm if the pressure exceeds the designed safety limit. The safety valve ensures that the pressure in the air buffer tank remains below 0.8 MPa, preventing the pressure from exceeding the designed value and the operating pressure of the buffer tank during continuous operation of the air compressor. Compressed air from the air buffer tank is transferred via a gas pipeline to a filter. After passing through a precision filter, the air is further dried and purified of moisture, oil, and gaseous impurities. The resulting clean compressed air is then transferred via a gas pipeline to the oxygen production system. The oxygen concentrator utilizes pressure swing adsorption (PSA). Taking advantage of the varying adsorption capacities of molecular sieves for nitrogen and oxygen at varying pressures, nitrogen, water, and carbon dioxide are adsorbed on the molecular sieve surface. Unadsorbed oxygen is collected at the outlet and flows out of the top of the adsorption tower. After the molecular sieve is saturated, the pressure is reduced and purged to remove adsorbed nitrogen, water, and carbon dioxide, completing the regeneration process. The adsorption tower alternates between adsorption and regeneration, producing product oxygen with a stable flow rate and purity. If the oxygen concentration does not meet the standard, the product gas is vented. The oxygen concentrator uses a DN25 inlet valve, a DN25 outlet valve, a DN25 purge valve, and a DN40 exhaust valve. 4V210 solenoid valves are used for pneumatic control of the oxygen concentrator's logic valves. PLC programming ensures precise control of the oxygen concentrator's logic valves. When the oxygen concentration reaches 93%, the oxygen concentration detector sends a qualified signal, the drain valve closes, and the qualified oxygen is transferred to the oxygen buffer tank through the pipeline. The oxygen buffer tank temporarily stores and buffers the oxygen produced by the oxygen concentrator, and provides sufficient oxygen reserves for the subsequent opening of the oxygen compressor. The oxygen in the oxygen buffer tank is also subject to oxygen quality testing, mainly testing items such as oxygen dew point and oxygen particle size. After inspection, the oxygen that meets the gas requirements enters the oxygen supply system. If the inspection fails, the electronic control system will alarm, and the staff will shut down the machine for inspection and eliminate hidden dangers. After the gas quality meets the requirements, the next step of oxygen boosting operation will be carried out.The oxygen production system's electrical control cabinet primarily consists of a switching power supply, circuit breaker, contactor, relay, PLC and its expansion modules, HMI touch screen, heater, fan, and related accessories. All device control information is uploaded to the PLC module and then transmitted via a network cable to the integrated display and control terminal. Oxygen filling and inhalation can be performed simultaneously. The system provides operational prompts based on the current oxygen production progress and the pressure of finished oxygen in the oxygen buffer tank. It also locks out any non-compliant operating buttons to prevent oxygen from the high-pressure filling pipeline from flowing into the low-pressure oxygen inhalation terminal pipeline.

[0042] Working condition 2 is the power supply condition of the generator set. In this working condition, it is necessary to start the generator first, and then start the integrated display and control terminal. At this time, the generator module status is online, and the load condition and fuel remaining of the generator set can be monitored in real time.

[0043] The following combination Figure 4 、 Figure 5 、 Figure 6 The control module and system logic of the present invention are described.

[0044] The oxygen production system involved in this embodiment includes an air compressor and refrigeration dryer, an air buffer tank, an oxygen generator, an oxygen buffer tank, an oxygen quality detector, an oxygen compressor, a gas cylinder group, a generator group, and an electrical control cabinet.

[0045] The bottom sensor unit is mounted via the CAN bus and connected to Figure 3 Position 2, shown as a diagram, supports multi-level expansion. After the circuit is connected, the upper-level control IO port receives a level signal, automatically activates address assignment, and connects communication data, enabling rapid replacement and expansion. The display and control terminal integrates a network interface, RS485 interface, and core processor, simplifying peripheral components and utilizing a communication interface to increase device access adaptability. Because the oxygen production and filling process involves pressure vessels of varying sizes and pressure capacities, all operational steps must be executed according to strict logic. To prevent human error in the high-altitude hypoxic environment, the control system has embedded operational process lockout logic. When the air compressor starts, the air buffer tank, oxygen concentrator, and oxygen buffer tank start in a chained manner, simultaneously locking the oxygen intake and filling branches. The filling branch is unlocked when the oxygen concentration test passes and the oxygen buffer tank pressure meets the standard. The oxygen production module is prohibited from starting if the oxygen intake branch, oxygen storage tank output, or filling branch is open. If any pressure vessel is overloaded, the pressure relief valve automatically opens, shutting down the oxygen production system. When the oxygen filling process is completed and the output end of the oxygen storage cylinder is not closed, it is prohibited to close the filling branch and the oxygen absorption branch.

[0046] like Figure 4 As shown, the sensor unit is connected to a signal amplifier. After A / D conversion, the signal is transmitted to the terminal CPU, where it enters the logic processing unit for identification and address assignment. The CPU core is directly connected to the RS485 communication unit and the network communication unit. The network unit is directly connected to the PLC control module and the surveillance camera video stream.

[0047] like Figure 6 The operation logic shown is as follows:

[0048] Step 1: Start the generator and perform a power-on self-test. If there is any equipment failure information, go to step 2. If the equipment status is normal, go to step 5.

[0049] Step 2: Disable the air compressor, start the oxygen generator, and determine whether the intermediate pressure unit is overloaded. If it is overloaded, go to step 3; if not, go to step 4.

[0050] Step 3: Open the pressure relief valves of the intermediate and terminal pressure vessels, and a fault alarm will sound. After the pressure vessel is depressurized, notify personnel to handle the problem and then the process is over.

[0051] Step 4: The fault alarm is triggered and personnel are notified to handle the problem.

[0052] Step 5: Select the working mode. If it is oxygen production mode, go to step 6. If it is filling mode or oxygen inhalation mode, go to step 13.

[0053] Step 6: Determine whether the filling end of the oxygen storage cylinder is open. If not, go to step 7; if open, go to step 8.

[0054] Step 7: The oxygen concentrator stops and starts, and the relevant port control buttons light up red. After correct operation, go to step 6.

[0055] Step 8: Perform oxygen production operation and monitor in real time whether the oxygen concentration in the oxygen concentrator meets the standard. If the oxygen concentration meets the standard, go to step 9.

[0056] Step 9: When prompted to open the oxygen cylinder inlet, close the oxygen inhalation and filling control valves, the front button lights up red, and go to step 10.

[0057] Step 10: Determine whether the oxygen inhalation branch and the filling branch are closed. If closed, go to step 11; if not closed, go to step 9.

[0058] Step 11: Pour oxygen into the oxygen storage cylinder and monitor whether the oxygen storage cylinder is full. If it is full, go to step 12; if it is not full, continue with step 11.

[0059] Step 12: Oxygen production stops, oxygen inhalation and filling control are released, and the process ends.

[0060] Step 13: Determine whether the oxygen production process is in progress. If yes, proceed to step 14; otherwise, proceed to step 15.

[0061] Step 14: The button is locked, the process is prohibited from starting, a prompt is given to wait or turn off the oxygen generator, and go to step 13.

[0062] Step 15: Determine whether the output end of the oxygen storage cylinder is open. If so, proceed to step 16; otherwise, proceed to step 14.

[0063] Step 16: The Oxygen / Filling button can be selected and go to step 17.

[0064] Step 17: When oxygen inhalation / filling is completed and closed, determine whether to close the oxygen storage tank output. If yes, go to step 18; otherwise, go to step 19.

[0065] Step 18: The button is locked, prohibiting the process from starting, the front button lights up red, and go to step 17.

[0066] Step 19: Allow the oxygen inhalation / filling stop button to be selected and the process ends.

[0067] Key points of the present invention

[0068] 1. Safe operation guarantee technology in plateau hypoxia environment

[0069] To address the risk of human error caused by the hypoxic environment in the plateau, the system pioneered a logical interlocking mechanism for the operating process. This mechanism enforces the operating sequence through an embedded control algorithm, adopts a state machine model and hardware IO signal double verification, supports dynamic permission management, and ensures that all instructions must comply with the preset safety process before they can be executed, completely eliminating the risk of erroneous operation on the control end.

[0070] 2. Distributed safety control architecture for high-pressure oxygen production systems

[0071] A remote centralized control system for solenoid valve groups is designed, which realizes physical isolation and control of high-pressure valves through the industrial-grade CAN bus. It combines redundant power supply and dual-channel signal verification, and is equipped with valve group status self-diagnosis and failure protection strategies to significantly reduce the system failure rate while supporting multi-device cluster collaboration.

[0072] 3. Multimodal remote monitoring and multi-level interface expansion

[0073] The integrated real-time video stream (H.256 encoding / 20ms latency) is integrated with device status data for enhanced visibility into the oxygen production system's status under complex operating conditions, thereby improving decision-making efficiency. Multimodal data fusion significantly increases remote operation confidence, achieving a level equivalent to near-field operation. A distributed multi-level interface supports multi-device lower-level expansion, reducing the cost of subsequent auxiliary function development.

[0074] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, it is apparent to those skilled in the art that several variations and improvements may be made without departing from the principles of the present invention, and these should also be considered to fall within the scope of protection of the present invention.

Claims

1. A plateau oxygen production cabin control terminal, characterized in that: Including oxygen production control system, pressurized filling system, and electrical control system; The oxygen production control system is used to control the air compressor and refrigeration dryer, air buffer tank, oxygen generator, oxygen buffer tank, and oxygen quality detector; The electrical control system is used to control the generator set, oxygen production control box, distribution box and monitor the load conditions; The pressurized filling system is used to control the oxygen compressor and monitor the high-pressure filling gas line.

2. The plateau oxygen production cabin control terminal according to claim 1 is characterized in that: The oxygen production control system monitors the status of related equipment in the oxygen production system through PLC serial port communication, and coordinates the working mode of each device based on the acquired equipment information and environmental information.

3. A control method for a plateau oxygen production cabin, characterized in that: The specific steps include: Step 1: Start the generator and perform a power-on self-test. If there is any equipment failure information, go to step 2. If the equipment status is normal, go to step 5. Step 2: Disable the air compressor, start the oxygen generator, and determine whether the intermediate pressure unit is overloaded. If so, go to step 3; if not, go to step 4. Step 3: Open the pressure relief valves of the intermediate and terminal pressure vessels, trigger a fault alarm, and notify personnel to handle the problem after the pressure vessel is depressurized. Step 4: The fault alarm is issued and personnel are notified to handle the problem; Step 5: Select the working mode, oxygen generation mode, go to step 6, filling mode and oxygen inhalation mode, go to step 13; Step 6: Determine whether the filling end of the oxygen storage cylinder is open. If not, go to step 7; if open, go to step 8. Step 7: The oxygen concentrator stops and starts, and the relevant port control buttons light up red. After correct operation, go to step 6; Step 8: Perform oxygen production and monitor in real time whether the oxygen concentration in the oxygen concentrator meets the standard. If the oxygen concentration meets the standard, proceed to step 9. Step 9: Open the oxygen cylinder inlet, close the oxygen inhalation and filling control valves, the front button lights up red, and go to step 10; Step 10: Determine whether the oxygen inhalation branch and the filling branch are closed. If closed, go to step 11; if not closed, go to step 9; Step 11: Pour oxygen into the oxygen storage cylinder and monitor whether the oxygen storage cylinder is full. If it is full, go to step 12; if not, continue with step 11. Step 12: Oxygen production stops, oxygen inhalation and filling control are released, and the process ends; Step 13: Determine whether the oxygen production process is in progress. If yes, proceed to step 14; if not, proceed to step 15. Step 14: The button is locked, the process is prohibited from starting, a prompt is given to wait or turn off the oxygen generator, and go to step 13; Step 15: Determine whether the output end of the oxygen storage cylinder is open, if yes, proceed to step 16, otherwise proceed to step 14; Step 16: The oxygen / filling button can be selected and go to step 17; Step 17: When oxygen inhalation / filling is completed and closed, determine whether to close the oxygen storage tank output. If yes, go to step 18; otherwise, go to step 19. Step 18: The button is locked, the process is prohibited from starting, the front button lights up red, and go to step 17; Step 19: Allow the oxygen inhalation / filling stop button to be selected and the process ends.

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