Dynamic self-regulation oxygen production and supply system for mining mechanical equipment in high altitude area

Abstract

The invention discloses a dynamic self-regulation oxygen production and supply system for mining mechanical equipment in a high altitude area. The dynamic self-regulation oxygen production and supply system comprises a dirty air purification circulation system, an oxygen supply system, a fresh air mixing system and an environment detection and precise oxygen supply system, the dirty air purification circulation system performs two-stage purification treatment on operation dirty air through wet cyclone and dry filtration; the oxygen supply system is pressurized through an air compressor with air pressure compensation, and oxygen-enriched air is prepared by adopting a pressure swing adsorption principle; the fresh air mixing system is used for uniformly mixing the purified circulating air with the oxygen-enriched air; the environment detection and precise oxygen supply system drives a jet device to realize fixed-point oxygen supply by monitoring oxygen concentration in real time and positioning personnel. Through intelligent cooperation of multiple modules, the technical bottlenecks that oxygen carrying is difficult in the high-altitude low-pressure environment, traditional ventilation is high in energy consumption, and the oxygen utilization rate is low are overcome, efficient cyclic utilization of oxygen, accurate supply according to needs and system energy consumption optimization are achieved, and the safety of high-altitude mine excavation operation and the working efficiency of personnel are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of high-altitude ventilation and oxygen supply technology, and in particular to a dynamic self-adjusting oxygen supply system for mining machinery and equipment in high-altitude areas. Background Technology

[0002] With the continued growth in global demand for mineral resources and the gradual depletion of easily exploitable resources in plains and shallow areas, the expansion of mineral resource development into high-altitude areas with complex geological conditions and harsh natural environments has become an inevitable trend in the industry. Mining operations in high-altitude areas face a fundamental and severe problem of low pressure and oxygen deficiency.

[0003] At high altitudes, atmospheric pressure and air density decrease exponentially with increasing altitude. Studies show that for every 1000 meters increase in altitude, atmospheric pressure drops by approximately 10 kPa, and the partial pressure of oxygen decreases simultaneously, resulting in an oxygen content of only 60%-65% of that at sea level. This physiologically hypoxic environment not only severely damages the health of workers, easily triggering altitude sickness and reduced work capacity, but also poses a significant threat to mine safety. Furthermore, the low air density directly leads to a substantial decrease in the airflow and pressure of traditional ventilation equipment, significantly reducing ventilation efficiency. This renders the traditional method of improving air quality in the work area by simply increasing ventilation volume extremely energy-intensive and with limited effectiveness.

[0004] Existing oxygen supply technologies for high-altitude mines have several shortcomings: Firstly, traditional oxygen production equipment, such as PSA oxygen generators, generally suffers from low oxygen production efficiency and unstable oxygen concentration due to insufficient intake pressure in low-pressure environments, making it difficult to meet operational needs. Secondly, most oxygen supply systems adopt a "uniform flooding" supply mode, lacking precise adaptation to the location and oxygen consumption requirements of workers, and failing to effectively recover and reuse polluted air generated during operations, resulting in significant oxygen waste and high system energy consumption. Furthermore, the high dust concentration at high-altitude mining operations makes it difficult for traditional purification processes to achieve efficient purification and recycling of polluted air, further exacerbating the load on fresh air supply and oxygen production.

[0005] In summary, current mining operations in high-altitude areas face challenges such as oxygen supply stability, oxygen utilization efficiency, and system energy consumption optimization under low-pressure and oxygen-deficient environments, which require further improvement. There is an urgent need to develop a dedicated oxygen supply system that can adapt to the harsh high-altitude environment, integrating intelligent monitoring, precise oxygen supply, efficient circulation, and safety assurance. This system would fundamentally improve the safety, comfort, and economy of high-altitude mining operations, providing crucial technological support for the green, safe, and efficient development of high-altitude mineral resources. Summary of the Invention

[0006] To address the problem of oxygen supply at high altitudes in existing technologies, this invention provides a dynamic self-adjusting oxygen supply system for mining machinery and equipment in high-altitude areas.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a dynamic self-adjusting oxygen supply system for mining machinery and equipment in high-altitude areas, comprising a waste air purification and circulation system, an oxygen supply system, a fresh air mixing system and an environmental detection and precise oxygen supply system that work in sequence and in coordination. The purification output end of the waste air purification and circulation system is connected to the circulation air input end of the fresh air mixing system through a pipeline, which is used to deliver purified circulating air to the fresh air mixing system. The oxygen-enriched air output end of the oxygen supply system is connected to the oxygen injection end of the fresh air mixing system through an oxygen outlet pipe, which is used to supply oxygen-enriched air to the fresh air mixing system. The fresh air mixing system is also equipped with an external fresh air supply port, which is used to introduce external fresh air and dynamically mix and homogenize the circulating air, oxygen-enriched air and external fresh air. The input end of the environmental monitoring and precision oxygen supply system is connected to the mixed gas output end of the fresh air mixing system, which is used to monitor the working environment parameters and personnel location in real time, and to deliver the mixed oxygen-enriched air to the target working area in a directional tracking manner.

[0008] Furthermore, the wastewater purification and circulation system includes a wet cyclone filter, a dry filter, a water tank, and a water pump connected in sequence; the water tank includes an independent clean water tank and a sludge tank, and the bottom of the clean water tank is equipped with a conveying propeller for pushing the sludge settled in the clean water tank to the sludge tank; the inlet of the water pump is connected to the clean water tank, and the outlet is connected to the wet cyclone filter.

[0009] Furthermore, the wet cyclone filter includes a cylindrical body with an exhaust device installed at the center. A high-pressure atomizing nozzle connected to a water pump is arranged circumferentially at the front of the cylindrical body. The cylindrical body is equipped with controllable guide vanes and a guide tube located at the rear of the cylindrical body. A sludge collection tank is provided at the bottom of the cylindrical body. The controllable guide vanes can automatically adjust the deflection angle according to the concentration of the polluted air, so as to achieve efficient centrifugal dust removal of the polluted air.

[0010] Furthermore, the dry filter is equipped with a condenser plate and a filter plate inside. The condenser plate is located on the side close to the wet cyclone filter and is used to demistate the primary purified air. The filter plate is used to perform secondary filtration on the demisted air. The dry filter has a pulse air chamber integrated at the top, and each filter plate has a spray nozzle for blowing and cleaning the filter plates. The condenser plate has a flushing nozzle on one side, and the dry filter has a sludge discharge port at the bottom, which is connected to the sludge tank for discharging the flushed sludge into the sludge tank.

[0011] Furthermore, the oxygen supply system includes an air intake pipe, an air compressor, an air storage tank, a filter, and an oxygen generator connected in sequence; the input end of the air intake pipe is connected to the output end of the dry filter of the waste air purification and circulation system, for introducing part of the air after secondary purification; the output end of the oxygen generator is connected to the oxygen outlet pipe, for delivering the prepared oxygen-enriched air to the fresh air mixing system.

[0012] Furthermore, the air compressor has a built-in air pressure sensor. Based on the real-time ambient air pressure data fed back by the air pressure sensor, it dynamically adjusts its own compression ratio and output power to specifically boost the low-pressure air, so that the boosted air is stabilized within the standard intake pressure range required by the oxygen generator. The oxygen generator adopts the principle of pressure swing adsorption, which selectively adsorbs nitrogen components through internal molecular sieves under periodic pressure changes to achieve oxygen enrichment and produce oxygen-enriched air.

[0013] Furthermore, the main body of the fresh air mixing system is a gas mixing pipe, and a spiral guide plate is provided at the center of the gas mixing pipe; the two inlets of the gas mixing pipe are a circulating air inlet and an oxygen inlet, respectively. The circulating air inlet is connected to the output pipe of the waste air purification and circulation system, and the oxygen inlet is connected to the oxygen outlet pipe. After the two airflows enter, they generate forced swirling flow through the spiral guide plate, and uniform mixing is achieved through the principle of swirling shearing and mixing.

[0014] Furthermore, the environmental monitoring and precise oxygen supply system includes a hyperoxia air buffer and distribution box, an oxygen concentration detection device, an oxygen supply hood, and a personnel positioning and tracking oxygen supply unit. The input end of the high-oxygen air buffer and distribution box is connected to the output end of the fresh air mixing system through the main pipeline. The output end of the high-oxygen air buffer and distribution box is connected to the oxygen supply hood and the personnel positioning and tracking oxygen supply unit respectively. The oxygen concentration detection device is distributed and used to monitor the oxygen concentration in each work area in real time and feed back the data. The oxygen supply hood is placed in the driver's seat of the mining machinery and is used to provide directional oxygen to the driver. The personnel positioning and tracking oxygen supply unit includes an infrared positioning device and a servo-driven jet injector. The infrared positioning device is used to acquire the location coordinates of the workers in real time and transmit them to the control center. The servo-driven jet injector is connected to the hyperoxic air buffer and distribution box. The control center generates instructions based on the personnel location coordinates to drive the servo-driven jet injector so that its air outlet direction is aligned with the breathing zone area of ​​the target personnel.

[0015] Furthermore, the oxygen generation and supply system operates based on dynamic self-adjustment control logic, which includes location tracking sub-logic, concentration closed-loop sub-logic, and system coordination sub-logic. The positioning and tracking sub-logic is as follows: when the infrared positioning device detects that a person has entered a high oxygen consumption work area and stays there for more than a preset threshold, the control center instructs the servo-driven jet in the corresponding area to deflect and aim at the target person, and increases the gas supply flow of that branch. The closed-loop sub-logic of the concentration is as follows: the distributed oxygen concentration detection device feeds back the real-time monitored oxygen concentration data to the control center. The control center compares the measured value with the set target value, changes the oxygen production rate by adjusting the operating frequency of the oxygen generating equipment, and adjusts the speed of the air compressor in conjunction with the adjustment to dynamically compensate for the fluctuation of ambient air pressure and maintain a stable oxygen output partial pressure. The system's collaborative sub-logic is as follows: The control center integrates the number of operators, their activity intensity, and various data collected by environmental sensors to coordinate the fan frequency of the wastewater purification and circulation system, the fresh air supply ratio of the fresh air mixing system, and the operating power of the oxygen supply system, so as to achieve optimal system energy efficiency while ensuring safe oxygen supply.

[0016] The beneficial effects of this invention: 1. This invention deeply integrates four functional modules: waste air purification and circulation, low-pressure compensation oxygen generation, dynamic fresh air mixing, and precise tracking oxygen supply, forming a complete self-circulating oxygen supply system. It not only solves the problem of performance degradation of traditional ventilation and oxygen supply equipment caused by low atmospheric pressure and low air density in high-altitude areas, but also achieves closed-loop control of the entire process from environmental perception to on-demand supply through intelligent collaboration between various subsystems, significantly improving the operational safety of mining equipment and personnel comfort in extreme environments.

[0017] 2. Traditional high-altitude mines often employ a mode of directly discharging polluted air and replenishing it with large amounts of fresh air, resulting in high oxygen consumption and energy consumption. This invention uses a two-stage purification process of efficient wet cyclone and dry filtration to purify and recycle most of the polluted air, reducing the amount of fresh air and oxygen production required to maintain oxygen concentration. Combined with a fixed-point tracking oxygen supply technology based on personnel location and activity intensity, it avoids the waste of oxygen through "uniform flooding," and the control logic can dynamically coordinate the operating power of each module to optimize system energy efficiency while ensuring safety, thereby achieving a dual reduction in oxygen consumption and ventilation energy consumption.

[0018] 3. To address the issue of reduced oxygen production efficiency and concentration in oxygen-generating equipment such as PSA systems at high altitudes due to insufficient intake pressure, this invention incorporates an air compressor with pressure feedback regulation in the oxygen supply system. This compressor can compensate for environmental pressure decay in real time, ensuring that the oxygen-generating equipment always operates efficiently under standard intake pressure, thereby guaranteeing a stable and reliable supply of oxygen-enriched air.

[0019] 4. Unlike the uniform ventilation of traditional mines, the environmental monitoring and precise oxygen supply system of this invention integrates personnel positioning and directional adjustable jet technology to achieve directional tracking and delivery of oxygen supply flow; it can accurately guide oxygen-rich air to the breathing zone of workers, especially in high-intensity, high-oxygen-consumption work areas such as near the drill arm, to achieve "point-to-point" enhancement of oxygen supply, which not only improves the individual protection effect, but also further optimizes the overall oxygen distribution.

[0020] 5. The wastewater purification and circulation system of this invention adopts a combination of wet centrifugation and dry filtration processes. The wet cyclone filter effectively captures fine dust through atomized spraying and controllable airflow, making it particularly suitable for high-dust mining operations. The downstream dry filter and self-cleaning design ensure deep purification of the circulating air. The entire system achieves real-time perception and adaptive adjustment of system status through multi-sensor monitoring and intelligent closed-loop control, improving long-term operational stability and safety under complex and harsh working conditions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the wastewater purification and circulation system in this invention. Figure 3 This is a schematic diagram of the dry filter cross-sectional structure in the wastewater purification and circulation system of the present invention; Figure 4 This is a schematic diagram of the wet filter cross-sectional structure in the wastewater purification and circulation system of the present invention; Figure 5 This is a schematic diagram of the oxygen supply system in this invention; Figure 6 This is a schematic diagram of the environmental monitoring and precise oxygen supply system in this invention; Figure 7 This is a schematic diagram of the layout of the dynamic self-adjusting oxygen supply system of the present invention.

[0022] In the diagram: 1. Wastewater purification and circulation system; 11. Dry filter; 12. Water tank; 13. Wet cyclone filter; 14. Water pump; 111. Pulse air manifold; 112. Filter plate; 113. Condensate plate; 114. Flushing nozzle; 115. Sludge discharge port; 121. Clean water tank; 122. Sludge tank; 123. Conveying propeller; 131. High-pressure atomizing nozzle; 132. Exhaust device; 133. Controllable guide vanes; 134. Guide tube; 135. Sludge collection... 1. Collection tank; 2. Oxygen supply system; 21. Air storage tank; 22. Filter; 23. Oxygen generating equipment; 24. Inlet pipe; 25. Air compressor; 26. Oxygen outlet pipe; 3. Fresh air mixing system; 31. Spiral guide plate; 4. Environmental monitoring and precision oxygen supply system; 41. Servo-driven jet ejector; 42. Infrared positioning device; 43. High-oxygen air storage and distribution box; 44. Oxygen concentration detection device; 45. Oxygen supply hood; 5. Tunneling machine; 51. Driver's seat. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] This invention discloses a dynamic self-adjusting oxygen supply system for mining machinery and equipment in high-altitude areas.

[0025] Reference Figure 1 A dynamic self-adjusting oxygen supply system for mining machinery in high-altitude areas includes a waste air purification and circulation system 1, an oxygen supply system 2, a fresh air mixing system 3, and an environmental monitoring and precise oxygen supply system 4, which work in sequence and in coordination. Through the intelligent linkage of each system module, the system achieves efficient oxygen circulation, precise supply on demand, and optimization of system energy consumption, thereby improving the safety and efficiency of mining operations in high-altitude areas.

[0026] The waste air purification and circulation system 1 is connected to the circulating air input of the fresh air mixing system 3 via a pipeline. This system supplies deeply purified circulating air to the fresh air mixing system 3, reducing the fresh air supply and oxygen production load. The oxygen-enriched air output of the oxygen supply system 2 is connected to the oxygen injection end of the fresh air mixing system 3 via an oxygen outlet pipe 26, providing a stable concentration of oxygen-enriched air to the fresh air mixing system 3. The fresh air mixing system 3 is also equipped with an external fresh air supply port, which can introduce external fresh air according to the needs of the working environment and mix and homogenize the circulating air, oxygen-enriched air and external fresh air in a dynamic ratio to ensure a stable oxygen concentration in the output gas. The input of the environmental monitoring and precise oxygen supply system 4 is connected to the mixed gas output of the fresh air mixing system 3. By monitoring the working environment parameters and personnel location in real time, the mixed oxygen-enriched air is directionally tracked and delivered to the target working area, achieving precise supply of oxygen as personnel move.

[0027] Reference Figure 2Specifically, the wastewater purification and circulation system 1 includes a wet cyclone filter 13, a dry filter 11, a water tank 12, and a water pump 14 connected in sequence. It adopts a two-stage purification process combining wet centrifugation and dry filtration, which is suitable for high-dust mining operations and ensures the purification effect of the circulating air. The water tank 12 includes an independent clean water tank 121 and a sludge tank 122. The clean water tank 121 is used to store purification water. It is equipped with a conveying propeller 123 at the bottom, which can continuously push the sludge settled in the clean water tank 121 to the sludge tank 122 to avoid sludge accumulation affecting water quality. The water pump 14 is connected to the clean water tank 121 at the inlet and to the wet cyclone filter 13 at the outlet, providing water for wet purification and realizing the recycling of water resources.

[0028] Reference Figure 4 The wet cyclone filter 13 includes a cylinder. An exhaust device 132 installed at the center of the cylinder can draw the polluted air generated in the mining area into the cylinder. A high-pressure atomizing nozzle 131 connected to a water pump 14 is arranged circumferentially at the front of the cylinder, which can spray water mist into the cylinder to humidify and reduce dust in the polluted air. The controllable guide vanes 133 installed in the cylinder can automatically adjust the deflection angle according to the concentration of polluted air. The controllable guide vanes 133 adopt the mature adjustable vane structure of existing cyclone filters. The controllable guide vanes 133, together with the guide tube 134 at the rear of the cylinder, accelerate the centrifugal process, so that the powder-containing droplets are collected by the sludge collection tank 135 at the bottom of the cylinder under the action of centrifugal force, completing one purification.

[0029] Reference Figure 3 The dry filter 11 is equipped with a condenser plate 113 and a filter plate 112. The condenser plate 113 is located on the side closer to the wet cyclone filter 13 and is used to demist the air after primary purification. The filter plate 112 is located behind the condenser plate 113 and is used to perform secondary filtration on the air after demisting. After the air is purified in the dry filter 11, it is first demisted by the condenser plate 113 on the side closer to the wet cyclone filter 13 to remove water vapor from the air, and then it is filtered again by the filter plate 112 to intercept fine dust and achieve deep purification.

[0030] The dry filter 11 has a pulse air manifold 111 integrated at the top. Each filter plate 112 is equipped with a blow nozzle, which can periodically blow and clean the filter plates 112 to avoid clogging and affecting ventilation efficiency. A flushing nozzle 114 is provided on one side of the condenser plate 113 to flush the deposits on the surface of the condenser plate. The dry filter 11 has a sludge discharge port 115 at the bottom, which is connected to the sludge tank 122. The sludge generated by flushing and the dust intercepted by filtration can be discharged into the sludge tank 122 for centralized treatment through the sludge discharge port 115.

[0031] Reference Figure 5The oxygen supply system 2 includes an air intake pipe 24, an air compressor 25, an air storage tank 21, a filter 22, and an oxygen generator 23 connected in sequence, which can stably produce oxygen-enriched air in a low-pressure environment. The input end of the air intake pipe 24 is connected to the output end of the dry filter 11 of the waste air purification and circulation system 1, which is used to introduce part of the air after secondary purification as oxygen production raw material to ensure the cleanliness of the oxygen source.

[0032] The air compressor 25 has a built-in air pressure sensor that can collect and feed back ambient air pressure data in real time. Based on the feedback data, it can dynamically adjust its compression ratio and output power to specifically boost low-pressure air, compensate for the atmospheric pressure reduction caused by altitude, and make the boosted air reach and stabilize within the standard intake pressure range required by the oxygen generator 23 process, so as to improve the problem of insufficient intake pressure of oxygen generators in high-altitude areas.

[0033] Air storage tank 21 is used to store pressurized air, which plays a role in buffering and stabilizing the pressure to ensure the stability and continuity of the subsequent oxygen production process. The air output from air storage tank 21 is filtered again by filter 22 to remove impurities before entering oxygen generator 23. Oxygen generator 23 adopts the pressure swing adsorption (PSA) principle, which selectively adsorbs nitrogen components through internal molecular sieves under controllable periodic pressure changes, thereby enriching oxygen and ultimately producing oxygen-enriched air that meets the requirements. The output end of oxygen generator 23 is connected to oxygen outlet pipe 26, and oxygen-enriched air is delivered to fresh air mixing system 3 through oxygen outlet pipe 26 to provide a stable gas source for subsequent gas mixing.

[0034] The main body of the fresh air mixing system 3 is a mixing pipe. A spiral guide plate 31 is installed at the center of the mixing pipe. The two inlets of the mixing pipe are a circulating air inlet and an oxygen inlet. The circulating air inlet is connected to the output pipe of the waste air purification and circulation system 1 to receive purified circulating air. The oxygen inlet is connected to the oxygen outlet pipe 26 to receive oxygen-enriched air. At the same time, combined with the external fresh air introduced by the external fresh air supply port, the three airflows enter the mixing pipe and generate forced swirling under the action of the spiral guide plate 31. The principle of swirling shearing and mixing is used to achieve rapid and uniform mixing, ensuring that the oxygen concentration of the output mixed gas is uniform and consistent, and avoiding local oxygen concentrations that are too high or too low.

[0035] Reference Figure 6 The environmental monitoring and precision oxygen supply system 4 includes a high-oxygen air buffer and distribution box 43, an oxygen concentration detection device 44, an oxygen supply hood 45, and a personnel positioning and tracking oxygen supply unit, enabling coordinated operation of work environment monitoring and targeted precision oxygen supply. The input end of the high-oxygen air buffer and distribution box 43 is connected to the output end of the fresh air mixing system 3 through a main pipeline, used to store and distribute mixed oxygen-enriched air. Its output end is connected to the oxygen supply hood 45 and the personnel positioning and tracking oxygen supply unit respectively, ensuring a stable gas supply to each oxygen supply branch.

[0036] Reference Figure 6 and Figure 7 The oxygen concentration detection device 44 is distributed and can monitor the oxygen concentration in each working area in real time, and feed the monitoring data back to the control center in real time to provide data support for oxygen supply regulation; the oxygen supply mask 45 is arranged 0.5-1 meters above the head of the driver's seat 51 of the tunneling machine 5, and is adapted to the driver's breathing belt. It has a mask interface and flow adjustment knob, and can provide directional oxygen supply for the driver to ensure the driver's breathing safety and working comfort.

[0037] The personnel positioning and tracking oxygen supply unit includes an infrared positioning device 42 and a servo-driven jet injector 41. The infrared positioning device 42 is installed on the top of the work area to acquire the real-time position coordinates of the workers and transmit them to the control center. The servo-driven jet injector 41 is positioned at least near the drill arm of the tunneling machine 5 and in the main activity area of ​​the workers. The servo-driven jet injector 41 is connected to the high-oxygen air buffer and distribution box 43. The control center generates precise control commands based on the received personnel position coordinates to drive the deflection mechanism of the servo-driven jet injector 41, ensuring that its air outlet direction is always aligned with the breathing zone of the target personnel, thus achieving directional tracking and delivery of oxygen. The deflection mechanism of the servo-driven jet injector 41 adopts a mature existing servo motor-gear transmission / linkage drive structure.

[0038] The oxygen generation and supply system operates based on dynamic self-adjustment control logic. The control center coordinates the work of each system module. The dynamic self-adjustment control logic includes location tracking sub-logic, concentration closed-loop sub-logic, and system coordination sub-logic.

[0039] The operation of the positioning and tracking sub-logic is as follows: when the infrared positioning device 42 detects that a person has entered the high oxygen consumption work area and stays there for more than a preset threshold, the control center immediately instructs the servo-driven jet 41 of the corresponding area to quickly deflect and aim at the target person, and simultaneously increases the air supply flow of the branch to ensure that the oxygen supply for the high oxygen consumption workers is sufficient.

[0040] The operation process of the concentration closed-loop sub-logic is as follows: The distributed oxygen concentration detection device 44 feeds back the real-time oxygen concentration data of each area to the control center. The control center compares the measured value with the preset target value. If the measured value is lower than the target value, the oxygen production rate is increased by increasing the operating frequency of the oxygen generating equipment 23. At the same time, the speed of the air compressor 25 is adjusted to dynamically compensate for the fluctuation of ambient air pressure and maintain a stable oxygen output partial pressure. If the measured value is higher than the target value, the operating frequency of the oxygen generating equipment 23 and the speed of the air compressor 25 are reduced accordingly to reduce oxygen waste.

[0041] The operation process of the system's collaborative sub-logic is as follows: The control center comprehensively collects various data such as the number of workers, activity intensity, and air pressure and dust concentration monitored by environmental sensors. It coordinates the fan frequency of the waste air purification and circulation system 1, adjusts the purification and circulation efficiency, coordinates the fresh air supply ratio of the fresh air mixing system 3, optimizes the gas mixing effect, and coordinates the operating power of the oxygen supply system 2. Under the premise of ensuring safe oxygen supply to each work area, it achieves the optimal energy efficiency of the entire system and reduces operating energy consumption.

[0042] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A dynamic self-adjusting oxygen supply system for mining machinery in high-altitude areas, characterized in that: It includes a waste air purification and circulation system (1), an oxygen supply system (2), a fresh air mixing system (3), and an environmental monitoring and precise oxygen supply system (4) that work in sequence and in coordination. The purification output end of the waste air purification and circulation system (1) is connected to the circulation air input end of the fresh air mixing system (3) through a pipeline, which is used to deliver purified circulating air to the fresh air mixing system (3). The oxygen-enriched air output end of the oxygen supply system (2) is connected to the oxygen injection end of the fresh air mixing system (3) through the oxygen outlet pipe (26) for supplying oxygen-enriched air to the fresh air mixing system (3). The fresh air mixing system (3) is also provided with an external fresh air supply port, which is used to introduce external fresh air and dynamically mix and homogenize the circulating air, oxygen-enriched air and external fresh air. The input end of the environmental monitoring and precise oxygen supply system (4) is connected to the mixed gas output end of the fresh air mixing system (3) to monitor the working environment parameters and personnel location in real time, and to deliver the mixed oxygen-enriched air to the target working area in a directional tracking manner.

2. The dynamic self-adjusting oxygen supply system for mining machinery in high-altitude areas according to claim 1, characterized in that: The wastewater purification and circulation system (1) includes a wet cyclone filter (13), a dry filter (11), a water tank (12), and a water pump (14) connected in sequence. The water tank (12) includes a clean water tank (121) and a sludge tank (122) that are independent of each other. The bottom of the clean water tank (121) is provided with a conveying propeller (123) for pushing the sludge settled in the clean water tank (121) to the sludge tank (122). The inlet end of the water pump (14) is connected to the clean water tank (121), and the outlet end is connected to the wet cyclone filter (13).

3. The dynamic self-adjusting oxygen supply system for mining machinery in high-altitude areas according to claim 2, characterized in that: The wet cyclone filter (13) includes a cylinder, with an exhaust device (132) installed at the center of the cylinder. A high-pressure atomizing nozzle (131) connected to a water pump (14) is arranged circumferentially at the front of the cylinder. The cylinder is equipped with controllable guide vanes (133) and a guide tube (134) located at the rear of the cylinder. A sludge collection trough (135) is provided at the bottom of the cylinder. The controllable guide vanes (133) can automatically adjust the deflection angle according to the concentration of the polluted air to achieve efficient centrifugal dust removal of the polluted air.

4. The dynamic self-adjusting oxygen supply system for mining machinery in high-altitude areas according to claim 3, characterized in that: The dry filter (11) is equipped with a condenser plate (113) and a filter plate (112). The condenser plate (113) is located on the side close to the wet cyclone filter (13) and is used to demist the primary purified air. The filter plate (112) is used to perform secondary filtration on the demisted air. The dry filter (11) has a pulse air chamber (111) integrated on the top. The pulse air chamber (111) has a spray nozzle corresponding to each filter plate (112) for spraying and cleaning the filter plate (112). The condenser plate (113) has a flushing nozzle (114) on one side. The dry filter (11) has a sludge discharge port (115) at the bottom. The sludge discharge port (115) is connected to the sludge tank (122) for discharging the flushed sludge into the sludge tank (122).

5. The dynamic self-adjusting oxygen supply system for mining machinery in high-altitude areas according to claim 4, characterized in that: The oxygen supply system (2) includes an air inlet pipe (24), an air compressor (25), an air storage tank (21), a filter (22), and an oxygen generator (23) connected in sequence. The input end of the air inlet pipe (24) is connected to the output end of the dry filter (11) of the waste air purification and circulation system (1) to introduce part of the air after secondary purification. The output end of the oxygen generator (23) is connected to the oxygen outlet pipe (26) to deliver the prepared oxygen-enriched air to the fresh air mixing system (3).

6. The dynamic self-adjusting oxygen supply system for mining machinery in high-altitude areas according to claim 5, characterized in that: The air compressor (25) has a built-in air pressure sensor. Based on the real-time ambient air pressure data fed back by the air pressure sensor, it dynamically adjusts its own compression ratio and output power to specifically boost the low-pressure air, so that the boosted air is stable within the standard intake pressure range required by the oxygen generator (23). The oxygen generator (23) adopts the pressure swing adsorption principle, and selectively adsorbs nitrogen components through internal molecular sieves under periodic pressure changes to achieve oxygen enrichment and generate oxygen-enriched air.

7. A dynamic self-adjusting oxygen supply system for mining machinery and equipment in high-altitude areas according to any one of claims 1-6, characterized in that: The main body of the fresh air mixing system (3) is a gas mixing pipe, and a spiral guide plate (31) is provided at the center of the gas mixing pipe. The two inlets of the gas mixing pipe are the circulating air inlet and the oxygen inlet. The circulating air inlet is connected to the output pipe of the waste air purification and circulation system (1), and the oxygen inlet is connected to the oxygen outlet pipe (26). After the two airflows enter, they generate forced swirling flow through the spiral guide plate (31) and achieve uniform mixing through the principle of swirling shear and mixing.

8. A dynamic self-adjusting oxygen supply system for mining machinery and equipment in high-altitude areas according to any one of claims 1-6, characterized in that: The environmental monitoring and precise oxygen supply system (4) includes a high-oxygen air buffer and distribution box (43), an oxygen concentration detection device (44), an oxygen supply hood (45), and a personnel positioning and tracking oxygen supply unit; The input end of the high-oxygen air buffer and distribution box (43) is connected to the output end of the fresh air mixing system (3) through the main pipeline. The output end of the high-oxygen air buffer and distribution box (43) is connected to the oxygen supply hood (45) and the personnel positioning and tracking oxygen supply unit respectively. The oxygen concentration detection device (44) is distributed and used to monitor the oxygen concentration of each work area in real time and feed back the data. The oxygen supply hood (45) is arranged in the driver's seat (51) of the mining machinery and is used to provide directional oxygen to the driver. The personnel positioning and tracking oxygen supply unit includes an infrared positioning device (42) and a servo-driven jet nozzle (41). The infrared positioning device (42) is used to acquire the location coordinates of the workers in real time and transmit them to the control center. The servo-driven jet nozzle (41) is connected to the high-oxygen air buffer and distribution box (43). The control center generates instructions based on the personnel location coordinates to drive the servo-driven jet nozzle (41) so that its air outlet direction is aligned with the breathing zone area of ​​the target personnel.

9. The dynamic self-adjusting oxygen supply system for mining machinery in high-altitude areas according to claim 8, characterized in that: The oxygen generation and supply system operates based on dynamic self-adjustment control logic, which includes location tracking sub-logic, concentration closed-loop sub-logic, and system coordination sub-logic. The positioning and tracking sub-logic is as follows: when the infrared positioning device (42) detects that a person has entered a high oxygen consumption work area and stays for more than a preset threshold, the control center instructs the servo-driven jet (41) in the corresponding area to deflect and aim at the target person, and increases the gas supply flow of that branch. The concentration closed-loop sub-logic is as follows: the distributed oxygen concentration detection device (44) feeds back the real-time monitored oxygen concentration data to the control center. The control center compares the measured value with the set target value, changes the oxygen production rate by adjusting the operating frequency of the oxygen generating equipment (23), and adjusts the speed of the air compressor (25) in conjunction with the adjustment, dynamically compensates for the fluctuation of ambient air pressure, and maintains a stable oxygen output partial pressure. The system coordination sub-logic is as follows: The control center integrates the number of operators, activity intensity and various data collected by environmental sensors, and coordinates the fan frequency of the sewage and air purification circulation system (1), the fresh air supply ratio of the fresh air mixing system (3) and the operating power of the oxygen supply system (2) to achieve optimal system energy efficiency under the premise of ensuring safe oxygen supply.

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