A mine-use ultra-clean fresh air individual supply protection system and method

Abstract

A mine-use ultra-clean fresh air individual supply protection system and method, the system: the air inlet end of the air supply duct is arranged in the air supply tunnel, and the air outlet end thereof extends into the excavation tunnel; two air supply modes are adopted, namely, a local ventilator and an underground compressed air system; the local ventilator is installed at the air inlet end of the air supply duct; the compressed air system is arranged along the tunnel; the fresh air filter is arranged in the excavation tunnel, wherein the multi-stage filter assembly is connected to the air supply duct through the air inlet pipe of the fresh air device, and is connected to the ultra-clean air flow bin through the ultra-clean air flow supply pipe, and the carbon monoxide absorption device and the fresh air device air pump are arranged in the ultra-clean air flow supply pipe; the individual air supply pipeline is connected to the ultra-clean air flow bin, and the one-way valve, flow regulating device, and breathing mask are arranged on the individual air supply pipeline in sequence. Method: fresh air is supplied to the air supply duct through the local ventilator; deep purification is carried out through the fresh air filter, and the fresh air is delivered to the breathing mask through the individual air supply pipeline. The system and method can provide personalized clean air supply.

Description

Technical Field

[0001] The invention belongs to the technical field of mine dust filtration, and in particular is a mine ultra-clean fresh air individual supply protection system and method. Background Art

[0002] In the underground production process of coal mines, the health and safety of workers greatly depends on good air quality. Especially at the moment when single-tunnel excavation with anchoring has become the mainstream operation mode, workers work in a high-dust environment for a long time and face a serious risk of pneumoconiosis. The proportion of semi-coal-rock tunnel excavation working faces is expected to reach more than 50% in the next few years. The dust generated in this working environment is large and the dust is highly harmful. Existing dust control technology is difficult to effectively reduce the dust concentration to the occupational health and safety standards.

[0003] In the traditional mine ventilation system design, the main fans and local fans are mainly used to deliver fresh air to various working faces and tunneling faces in the mine. However, these systems are often unable to effectively filter out fine particles (such as PM2.5) due to their design and structural limitations. For example, if the air inlet duct of the dust collector is placed at a certain distance from the tunneling machine, it will make it difficult for the dust-laden airflow to enter the dust collector efficiently, reducing the effectiveness of dust control. This design defect not only affects the respiratory health of workers, but may also cause serious safety accidents.

[0004] In addition, the self-priming dust masks commonly used by workers have significant design flaws. As the use time of these masks increases, their breathing resistance will increase significantly, and the filter box will often be blocked in half a shift, making them less comfortable to use. Even if the filtering effect of these masks can reach 99%, due to their generally poor fit, dust may still enter the inside of the mask through the joint between the mask and the face. This situation is particularly common in semi-coal and rock excavation working faces, so their dust prevention effect is far from ideal.

[0005] Traditional mine ventilation systems and personal protective equipment are prone to a series of problems such as unstable airflow and filter blockage during operation, resulting in interruptions in air supply and reduced supply efficiency. The maintenance and operating costs of these systems are also high due to frequent blockages and losses. In addition, existing ventilation and dust control solutions are less flexible and cannot adjust the air supply method according to the specific conditions of different working faces or excavation faces, further limiting their effectiveness in practical applications.

[0006] In view of the limitations and shortcomings of the existing technology, there is an urgent need to provide a new type of ultra-clean fresh air individual supply protection system and method, so as to centrally and efficiently purify the air and deliver the purified fresh air to the work area for use by different individuals. Summary of the invention

[0007] In view of the problems existing in the above-mentioned prior art, the present invention provides a mine ultra-clean fresh air individual supply protection system and method, which has convenient operation process, simple maintenance process, ideal filtering effect, good stability, good flexibility, and high versatility. It can centrally and efficiently purify the air, and can realize personalized clean air supply for each worker, and can provide reliable health protection for workers working underground. The method has a high degree of automation, good safety, and high reliability. It can stably provide purified fresh air supply services for underground working spaces and individuals, which can effectively protect the health of underground workers and help improve the safety factor of underground operations.

[0008] In order to achieve the above-mentioned object, the present invention provides a mine ultra-clean fresh air individual supply protection system, comprising an excavation tunnel, an air supply tunnel, an ultra-clean fresh air supply mechanism and a controller;

[0009] The air inlet end of the air supply tunnel starts from the main ventilation shaft or main air tunnel at the mine entrance, and the air outlet end thereof runs through the entire mine longitudinally and is connected with each excavation tunnel;

[0010] The ultra-clean fresh air supply mechanism includes a main air supply unit and a fresh air filter;

[0011] The main air supply unit includes an air supply duct, a local ventilator and a fresh air flow monitoring component; the air inlet end of the air supply duct is located in the air supply tunnel, and its air outlet section extends along the length direction of the tunneling tunnel; the local ventilator is installed at the air inlet end of the air supply duct; the fresh air flow monitoring component is installed inside the air supply duct and is located on the air inlet side of the local ventilator; the fresh air flow monitoring component includes a temperature and humidity monitoring module, a particle concentration monitoring module and a multi-dimensional air pollutant monitoring module, the temperature and humidity monitoring module is used to collect the temperature and humidity signal at the location in real time, the particle concentration monitoring module is used to collect the particle concentration signal at the location in real time, and the multi-dimensional air pollutant monitoring module is internally integrated with a CO sensor, an NO sensor, a CH4 sensor, a CO2 sensor and a TVOC sensor, which are used to collect the CO concentration signal, NO concentration signal, CH4 concentration signal, CO2 concentration signal and TVOC concentration signal at the location in real time;

[0012] The number of the fresh air filter is one or more, which is suspended in the tunnel and located above the tunnel boring machine; the fresh air filter includes an outer shell, a multi-stage filter assembly, a fresh air device air inlet pipe, an ultra-clean air flow chamber, an ultra-clean air flow air supply pipe, a carbon monoxide absorption device, a fresh air device air pump, an ultra-clean air flow monitoring assembly, an individual clean air supply unit, an alarm module and a microprocessor;

[0013] The multi-stage filter assembly is installed inside the outer shell, and includes a filter shell, a front metal screen, a middle metal screen and a high-precision composite filter mechanism; a first-level air inlet is opened at one end of the filter shell, and a first-level air outlet is opened at the other end; the filtering accuracies of the front metal screen, the middle metal screen and the high-precision composite filter mechanism are increased in sequence, and are installed in the filter shell in sequence from the air inlet side to the air outlet side;

[0014] The air inlet end of the air inlet pipe of the fresh air device is connected to the air outlet end of the air supply duct, an air inlet control valve is connected in series in the middle section, and the air outlet end thereof penetrates into the interior of the outer shell and is connected to the primary air inlet;

[0015] The ultra-clean airflow chamber is installed inside the outer shell, and is provided with a secondary air inlet and a plurality of individual air outlet interfaces connected to the inner cavity thereof;

[0016] The air inlet end of the ultra-clean air flow air supply pipe is connected to the primary air outlet, and the air outlet end thereof is connected to the secondary air inlet;

[0017] The carbon monoxide absorption device is connected in series to the air inlet side of the ultra-clean air flow air supply pipe;

[0018] The air pump of the fresh air device is connected in series to the air outlet side of the ultra-clean air flow air supply pipe;

[0019] The ultra-clean airflow monitoring component 1 is installed inside the ultra-clean airflow supply duct and is located on the air outlet side of the air pump of the fresh air device; the ultra-clean airflow monitoring component 1 includes a temperature and humidity monitoring module 3, a particle concentration monitoring module 3 and a multi-dimensional air pollutant monitoring module 3, the temperature and humidity monitoring module 3 is used to collect the temperature and humidity signal 3 at the location in real time, the particle concentration monitoring module 3 is used to collect the particle concentration signal 3 at the location in real time, and the multi-dimensional air pollutant monitoring module 3 is internally integrated with a CO sensor 3, a NO sensor 3, a CH4 sensor 3, a CO2 sensor 3 and a TVOC sensor 3, which are used to collect the CO concentration signal 3, the NO concentration signal 3, the CH4 concentration signal 3, the CO2 concentration signal 3 and the TVOC concentration signal 3 at the location in real time;

[0020] A plurality of individual clean air supply units correspond to a plurality of individual air outlet interfaces, and the individual clean air supply units include individual air supply pipelines, one-way valves, flow regulating devices, and breathing masks. The air inlet end of the individual air supply pipeline penetrates into the interior of the outer shell and is connected to the corresponding individual air outlet interface; the one-way valve is serially connected to the air inlet section of the individual air supply pipeline; the flow regulating device is serially connected to the middle section of the individual air supply pipeline; the breathing mask is connected to the air outlet end of the individual air supply pipeline;

[0021] The alarm module is installed outside the outer shell;

[0022] The microprocessor is installed inside the outer shell and is respectively connected to the air inlet control valve, the fresh air device air pump, the ultra-clean air flow monitoring component 1, the flow regulating device and the alarm module;

[0023] The controller is respectively connected to the fresh air flow monitoring component 1, the local ventilator and the microprocessor.

[0024] Furthermore, in order to fully ensure the safety and reliability of underground air supply operations, the ultra-clean fresh air supply mechanism also includes a second air supply unit;

[0025] The second air supply unit includes an underground compressed air pipeline, an air duct supply pipeline, a fresh air flow monitoring component 2 and a compressed air control valve; the air inlet end of the air duct supply pipeline is connected to the underground compressed air pipeline; the fresh air flow monitoring component 2 is installed inside the middle section of the air duct supply pipeline, and the fresh air flow monitoring component 2 includes a temperature and humidity monitoring module 2, a particulate matter concentration monitoring module 2 and a multi-dimensional air pollutant monitoring module 2, the temperature and humidity monitoring module 2 is used to collect a temperature and humidity signal 2 at the location in real time, the particulate matter concentration monitoring module 2 is used to collect a particulate matter concentration signal 2 at the location in real time, and the multi-dimensional air pollutant monitoring module 2 is internally integrated with a CO sensor 2, a NO sensor 2, a CH4 sensor 2, a CO2 sensor 2 and a TVOC sensor 2, which are used to collect a CO concentration signal 2, a NO concentration signal 2, a CH4 concentration signal 2, a CO2 concentration signal 2 and a TVOC concentration signal 2 at the location in real time; the compressed air control valve is serially connected to the air outlet end of the air duct supply pipeline;

[0026] The air inlet end of the air inlet pipe of the fresh air device is connected to the air outlet end of the air supply cylinder and the air outlet end of the air supply pipeline of the air duct through an electric three-way valve;

[0027] The controller is also connected to the fresh air flow monitoring component 2, the electric three-way valve and the compressed air control valve. In this way, two ways of supplying air can be provided as the air source for the fresh air filter, so that when a local ventilator fails or when the air quality of the fresh air flow is poor, the compressed air in the underground compressed air pipeline can be used as the air source for the fresh air filter, which can effectively ensure the stability and reliability of the underground ultra-clean air supply. The fresh air flow monitoring component 2 is set in the air duct supply line connected to the underground compressed air pipeline. The fresh air flow monitoring component 2 can be used to more comprehensively detect the quality of the compressed air, and further compare the compressed air quality with the fresh air quality. On this basis, the air inlet end of the air inlet pipe of the fresh air device is connected to the air outlet end of the air supply tube and the air outlet end of the air duct supply line through the electric three-way valve, which can facilitate the controller to quickly switch the air supply source according to the comparison result, further improving the reliability of the air supply process.

[0028] Furthermore, in order to facilitate the installation of the air supply duct and to avoid the air supply duct from interfering with other operating equipment, a roof support mesh is arranged at the top of the excavation tunnel, and the air supply duct is connected to the bottom of the roof support mesh through a connecting piece.

[0029] Furthermore, in order to conveniently transport ultra-clean fresh air to a distant place so as to expand the function of the protection system, a secondary air outlet is also provided on the ultra-clean airflow bin; the fresh air filter also includes a branch ventilation duct, a fresh air device fan and an ultra-clean airflow monitoring component 2, the air inlet end of the branch ventilation duct penetrates into the interior of the outer shell and is connected to the secondary air outlet, and a plurality of branch interfaces are connected to the pipe body at intervals; the fresh air device fan is connected to a microprocessor, which is connected in series to the air inlet end of the branch ventilation duct; the ultra-clean airflow monitoring component 2 is connected to a microprocessor, which is installed inside the branch ventilation duct and is located on the air outlet side of the fresh air device fan, The ultra-clean airflow monitoring component 2 includes a temperature and humidity monitoring module 4, a temperature and humidity monitoring module 4 and a multi-dimensional air pollutant monitoring module 4. The temperature and humidity monitoring module 4 is used to collect the temperature and humidity signal 4 at the location in real time. The temperature and humidity monitoring module 4 is used to collect the particle concentration signal 4 at the location in real time. The multi-dimensional air pollutant monitoring module 4 is internally integrated with a CO sensor 4, a NO sensor 4, a CH4 sensor 4, a CO2 sensor 4 and a TVOC sensor 4, which are used to collect the CO concentration signal 4, the NO concentration signal 4, the CH4 concentration signal 4, the CO2 concentration signal 4 and the TVOC concentration signal 4 at the location in real time. By setting a fresh air device fan in the branch ventilation duct, it is convenient to transport the ultra-clean fresh air in the ultra-clean airflow bin to a farther location, so as to meet the breathing needs of people at a distance from the fresh air filter. By setting up an ultra-clean airflow monitoring component 2 in the branch ventilation duct, it is possible to facilitate real-time monitoring of the quality of ultra-clean fresh air in the branch ventilation duct, thereby ensuring the air quality of the ultra-clean fresh air in the branch ventilation duct. At the same time, it is also beneficial to timely monitor whether polluted air enters the branch ventilation duct, thereby avoiding the occurrence of transported air quality pollution due to damage to the branch ventilation duct.

[0030] Furthermore, in order to ensure the filtering effect and filtering efficiency, the high-precision composite filtering mechanism includes a filter cartridge 1027, a filter element 1028 and a guide plate 1029; the body of the filter cartridge is provided with a plurality of mesh holes all over the surface; the filter element is inserted into the interior of the filter cartridge; the filter element is a hollow cylindrical continuous pleated filter material, the pleated filter material is a three-layer structure, which is a coarse filter layer, a medium filter layer and a high-efficiency filter layer from the outside to the inside, and at the same time, the continuous pleated filter material is formed by connecting a plurality of pleated units in sequence, and the cross section of each pleated unit is trapezoidal; the guide plate is located in the annular area between the filter cartridge and the filter element, and is spirally wound around the outside of the filter element. The filter element is a hollow cylindrical continuous pleated filter material, which can significantly increase the filtering area and dust volume of the filter material in a limited area, and is conducive to extending the effective use time of the filter element. In addition, several pleated units can guide and disperse the passing airflow more evenly and effectively, so that the airflow can have more directional changes when passing through the filter element. The multi-directional airflow path significantly increases the probability of particles in the airflow contacting the filter material, thereby improving the capture efficiency of particles. At the same time, the dispersed airflow path avoids pressure concentration at any single position, which helps to reduce the resistance of airflow. The setting of the spiral guide plate is conducive to making the airflow entering the fresh air filter more evenly distributed on the surface of the filter element, so that all parts of the filter element can be fully utilized, fully increasing the effective filtration area, and helping to increase the service life of the fresh air filter.

[0031] As a preferred embodiment, the breathing mask includes a mask body, an inhalation valve and an exhalation valve; the mask body has a breathing cavity inside, and its rear side is an open structure adapted to the face, and the open part is surrounded by silicone material; an air outlet is provided at the lower front part of the mask body, and an air inlet is provided at the upper front part; the mask body is connected to an air circuit connector at the outer periphery of the front side of the air inlet; the air circuit connector is connected to the air outlet end of the individual air supply pipeline through a flexible pipeline; the inhalation valve is installed in the air inlet; and the exhalation valve is installed in the air outlet.

[0032] Furthermore, in order to avoid excessive internal pressure in the ultra-clean airflow chamber, the fresh air filter also includes a pressure relief valve, the inlet end of the pressure relief valve passes through the outer shell and is connected to the ultra-clean airflow chamber, and the outlet end is connected to the outside atmosphere.

[0033] Furthermore, the air inlet end of the air supply duct is located at the upstream side of the fresh air flow in the air supply tunnel. In this way, it can be ensured that the fresh air flow in the air supply tunnel can provide negative pressure for the excavation tunnel, thereby facilitating the rapid removal of the polluted air flow generated in the excavation tunnel and the gas exhaled by the workers.

[0034] In the present invention, the air inlet end of the air supply duct is located in the air supply tunnel, and the air outlet section is extended along the length direction of the excavation tunnel, which can provide a wind source access point with an appropriate distance for each specific excavation tunnel, thereby improving the convenience of the air supply access process of the working face. At the same time, a local ventilator is installed at the air inlet end of the air supply duct, so that the local ventilator can be used to transport the fresh air flow in the excavation tunnel through the air supply duct to the excavation tunnel, thereby facilitating the provision of a fresh air source for the working face; a fresh air flow monitoring component 1 connected to the controller is set at the air inlet end of the air supply duct, and the fresh air flow monitoring component 1 includes a temperature and humidity monitoring module 1, a particulate matter concentration monitoring module 1 and a multi-dimensional air pollutant monitoring module 1, which can facilitate a more comprehensive quality detection of the fresh air flow, so that when the pollution level of the fresh air flow is greater than the air pollution quality threshold, an alarm signal can be promptly sent to the remote terminal, so that relevant personnel can be reminded to check the air source in time and take effective countermeasures to avoid the situation where the fresh air flow quality is too poor and still cannot meet the use requirements even after filtering by the fresh air filter. Therefore, it can not only effectively ensure the safety of the user's personal health, but also avoid the situation where the service life of the fresh air filter is sharply reduced due to filtering the fresh air flow with a high degree of pollution. One or more fresh air filters are arranged above the tunnel boring machine, and a centralized filtering node can be formed in the tunnel boring face. In this way, not only the breathing scheme of using only single masks for dust prevention in the underground of the traditional technology is changed, but also the fresh air filter with better filtering effect and efficiency than the traditional single mask can be used to centrally and efficiently realize the air purification operation, so that ultra-clean fresh air can be supplied to multiple individuals in the tunnel boring face at the same time, which greatly ensures the filtering effect and can effectively ensure the personal health and safety of miners. The primary air inlet of the filter housing is connected to the air outlet end of the air supply tube through the air inlet pipe of the fresh air device, so that the fresh air flow entering the air supply tube can be easily guided to the fresh air filter by using the air inlet pipe of the fresh air device. In this way, the fresh air flow in the air supply tunnel can be used as the air inlet of the fresh air filter instead of the polluted air flow in the tunnel boring tunnel, which is conducive to ensuring the subsequent air purification effect. The front-end metal screen, the middle-end metal screen and the high-precision composite filter mechanism are arranged in sequence in the filter shell of the multi-stage filter assembly, and the filtering effect on the fresh airflow can be significantly improved by multi-stage filtering. The filtering accuracy of the front-end metal screen is made smaller than that of the middle-end metal screen, and the front-end metal screen can be used to intercept and filter out the particles with larger particle sizes, and then the middle-end metal screen can be used to intercept and filter out the particles with smaller particle sizes. In this way, it is ensured that the particles with larger particle sizes will not directly enter the middle-end metal screen, and that the particles with smaller particle sizes will not directly enter the high-precision composite filter mechanism, thereby ensuring the filtering effect and filtering efficiency of the middle-end metal screen on the particles with smaller particle sizes, and at the same time, ensuring the filtering effect and filtering efficiency of the high-precision composite filter mechanism on the fine or ultrafine particle sizes.Thus, a triple progressive graded deep purification effect can be achieved through the front metal screen, the middle metal screen and the high-precision composite filtering mechanism, namely "pre-filtration-strong filtration-deep purification". By fully filtering the particles of different particle sizes in the air flow step by step, it is ensured that various particles in the air can be filtered out layer by layer from large to small, which significantly improves the air purification effect, thereby achieving the purpose of deep purification and effectively protecting the health of the breathing individual. An ultra-clean air flow warehouse is set in the outer shell, and the ultra-clean air flow warehouse is connected to the filter shell through the ultra-clean air flow air supply pipe, and then the carbon monoxide absorption device, the fresh air device air pump and the ultra-clean air flow monitoring component are connected in sequence from the air inlet side to the air outlet side in the ultra-clean air flow air supply pipe. The fresh air device air pump can provide negative pressure so that the filtered fresh air flow quickly passes through the carbon monoxide absorption device and enters the ultra-clean air flow warehouse. In this process, the carbon monoxide absorption device can efficiently remove the carbon monoxide in the filtered fresh air flow, thereby forming ultra-clean fresh air. The ultra-clean airflow bin can not only store a certain amount of ultra-clean fresh air, but also help to form a buffering effect on the ultra-clean fresh air, thereby ensuring that the output ultra-clean fresh air can have a stable flow rate. Through the setting of the ultra-clean airflow monitoring component one, it is convenient to monitor the quality of the ultra-clean fresh air, and thus timely discover the situation where the ultra-clean fresh air quality is unqualified. In the ultra-clean airflow monitoring component one, a temperature and humidity monitoring module three, a particle concentration monitoring module three and a multi-dimensional air pollutant monitoring module three are set, which can comprehensively and reliably monitor the quality of the fresh air, thereby effectively ensuring the quality of the fresh air supplied to the breathing individual. At the same time, since the ultra-clean airflow monitoring component one is connected to the ultra-clean airflow bin, the ultra-clean airflow monitoring component one can also detect whether the air quality in the ultra-clean airflow bin is polluted, so that the damage of the fresh air filter can be discovered in time, further ensuring the safety and reliability of use. By setting the microprocessor module and the alarm module, it is helpful to control the alarm module to perform warning actions in time when the monitoring data exceeds the monitoring threshold, so as to remind relevant personnel to check and repair the fresh air filter or air source in time. At the same time, it can also help managers to find the situation of dangerous gas exceeding the standard in time, which can help to avoid the occurrence of safety accidents. The air inlet end of the individual air supply pipeline is inserted into the interior of the outer shell and connected with the corresponding individual air outlet interface. At the same time, the breathing mask is connected to the air outlet end of the individual air supply pipeline. The individual air supply pipeline can be used to supply the ultra-clean fresh air in the ultra-clean air flow warehouse to a specific working position, so that workers with a small operating radius and a relatively fixed working position can use it. By setting a one-way valve in the individual air supply pipeline, it can be ensured that the ultra-clean air in the ultra-clean air flow warehouse can only be output to the outside in one direction, and the air near the excavation face or the working face will not enter the ultra-clean air flow warehouse through the individual air supply pipeline. Thus, the problem of air pollution in the ultra-clean air flow warehouse caused by backflow is avoided, and the safety and reliability of the system are further improved.By setting up the flow regulating device, the flow regulating device can be used to smooth the airflow passing through, and the airflow flow in the individual air supply duct can be adjusted in real time, thereby providing a corresponding personalized clean air supply rate according to the actual breathing frequency and breathing volume of the workers, avoiding insufficient or excessive air supply, and improving the breathing comfort and safety of individual users.

[0035] The system is easy to operate, simple to maintain, has ideal filtering effect, good stability, good flexibility, high versatility, and can flexibly adapt to different working environments. Through the use of this system, the air can be purified centrally and efficiently, the filtering effect can be improved to 99.99%, and the purified fresh air can be directly delivered to the area where the workers are located, ensuring that each working surface can obtain clean air, and can realize personalized clean air supply for each worker, thereby significantly improving the quality of air for workers to breathe, providing reliable health protection for workers working underground, completely solving the problem of pneumoconiosis, and helping to improve safety during the operation process. At the same time, the system is highly flexible and adaptable, can meet the use requirements under the changing working environment and conditions in the mine, and is suitable for supplying purified air to workers with a small working activity radius and relatively fixed working positions.

[0036] The present invention also provides a method for protecting individual supply of ultra-clean fresh air for mining, which adopts an individual supply protection system for ultra-clean fresh air for mining, and comprises the following steps:

[0037] Step 1: Use a fresh air flow monitoring component to monitor the fresh air quality on the upstream side of the local ventilator, and send the collected temperature and humidity signal 1, particulate matter concentration signal 1, CO concentration signal 1, NO concentration signal 1, CH4 concentration signal 1, CO2 concentration signal 1 and TVOC concentration signal 1 to the controller. The controller obtains temperature and humidity data 1, particulate matter concentration data 1, CO concentration data 1, NO concentration data 1, CH4 concentration data 1, CO2 concentration data 1 and TVOC concentration data 1 according to the temperature and humidity signal 1, particulate matter concentration signal 1, CO concentration signal 1, NO concentration signal 1, CH4 concentration signal 1, CO2 concentration data 1 and TVOC concentration signal 1, and integrates each monitoring data to obtain the fresh air cleanliness characterization value of the fresh air flow;

[0038] The quality of compressed air in the underground compressed air pipeline is monitored by using the second fresh air flow monitoring component, and the collected temperature and humidity signal 2, particulate matter concentration signal 2, CO concentration signal 2, NO concentration signal 2, CH4 concentration signal 2, CO2 concentration signal 2 and TVOC concentration signal 2 are sent to the controller. The controller obtains temperature and humidity data 2, particulate matter concentration data 2, CO concentration data 2, NO concentration data 2, CH4 concentration data 2, CO2 concentration data 2 and TVOC concentration data 2 according to the second temperature and humidity signal, the second particulate matter concentration signal, the second CO concentration signal, the second NO concentration signal, the second CH4 concentration signal, the second CO2 concentration signal and the second TVOC concentration signal, and integrates each monitoring data to obtain the compressed air cleanliness characterization value;

[0039] The controller compares and analyzes the fresh air cleanliness characterization value and the compressed air cleanliness characterization value; when the fresh air cleanliness characterization value and the compressed air cleanliness characterization value are both lower than the set cleanliness threshold and cannot meet the use requirements, the controller sends an alarm signal to the remote terminal connected to it; when the fresh air cleanliness characterization value is greater than the compressed air cleanliness characterization value, the controller controls the electric three-way valve to connect the fresh air device air inlet pipe and the air supply duct, and executes step two; when the fresh air cleanliness characterization value is less than the compressed air cleanliness characterization value, the controller controls the electric three-way valve to connect the fresh air device air inlet pipe and the air duct supply duct, and executes step three; when the fresh air cleanliness characterization value is equal to the compressed air cleanliness characterization value, the state of the electric three-way valve is kept unchanged. If the current electric three-way valve is connected to the fresh air device air inlet pipe and the air supply duct, step two is executed. If the current electric three-way valve is connected to the fresh air device air inlet pipe and the air duct supply duct, step three is executed.

[0040] Step 2: The controller controls the local ventilator to start working, and the microprocessor controls the air inlet control valve to open, and the local ventilator is used to introduce the fresh air flow in the air supply channel into the air supply tube and then into the air pump of the fresh air device;

[0041] Step 3: The controller sends a start signal to the microprocessor. After receiving the start signal, the microprocessor controls the air pump of the fresh air device to start working, and controls the flow regulating device in the individual clean air supply unit to open, and provides negative pressure to the filter housing through the air pump of the fresh air device to introduce fresh airflow into the filter housing, and sequentially uses the front-end metal screen, the middle-end metal screen and the high-precision composite filtering mechanism to perform triple progressive graded depth purification treatment on the fresh airflow, and then uses the carbon monoxide absorption device to remove carbon monoxide in the fresh airflow to obtain ultra-clean fresh air; through the action of the air pump of the fresh air device, the ultra-clean fresh air enters the ultra-clean airflow bin, and enters the breathing mask through the one-way valve and the flow regulating device in the individual clean air supply unit;

[0042] At the same time, the ultra-clean airflow monitoring component is used to monitor the ultra-clean fresh air quality on the downstream side of the air pump of the fresh air device, and the collected temperature and humidity signal three, particulate matter concentration signal three, CO concentration signal three, NO concentration signal three, CH4 concentration signal three, CO2 concentration signal three and TVOC concentration signal three are sent to the microprocessor. The microprocessor obtains temperature and humidity data two, particulate matter concentration data two, CO concentration data two, NO concentration data two, CH4 concentration data two, CO2 concentration data two and TVOC concentration signal three according to the temperature and humidity signal three, particulate matter concentration signal three, CO concentration signal three, NO concentration signal three, CH4 concentration signal three, CO2 concentration signal three and TVOC concentration signal three. Concentration data 2, and integrate various monitoring data to obtain the air cleanliness characterization value 1 of the ultra-clean fresh air. At the same time, the air cleanliness characterization value 1 is compared with the set air purification quality threshold. When the air cleanliness characterization value 1 is greater than or equal to the air purification quality threshold, the microprocessor does not send an action signal. When the air cleanliness characterization value 1 is less than the air purification quality threshold, the microprocessor controls the alarm module to perform an alarm action. At the same time, the air inlet control valve is controlled to close, the air pump of the fresh air device is controlled to stop working, and the flow regulating device is controlled to close. At the same time, the microprocessor sends an alarm signal to the controller. After receiving the alarm signal from the microprocessor, the controller sends an alarm signal to the remote terminal connected to it;

[0043] At the same time, the controller compares and analyzes the fresh air cleanliness characterization value and the compressed air cleanliness characterization value. When the fresh air cleanliness characterization value and the compressed air cleanliness characterization value are both lower than the set cleanliness threshold and cannot meet the use requirements, the controller sends an alarm signal to the remote terminal connected to it and sends an alarm signal to the microprocessor. After receiving the alarm signal from the controller, the microprocessor controls the alarm module to perform an alarm action. At the same time, the air inlet control valve is controlled to close, the air pump of the fresh air device is controlled to stop working, and the flow regulating device is controlled to close. When the fresh air cleanliness characterization value is greater than the set cleanliness threshold and the compressed air cleanliness characterization value at the same time, the controller controls the local ventilator to start working and controls the electric three-way valve to connect the fresh air device air inlet duct and the air supply pipe. When the fresh air cleanliness characterization value is less than the compressed air cleanliness characterization value, the controller controls the electric three-way valve to connect the fresh air device air inlet duct and the air duct supply duct. When the fresh air cleanliness characterization value is equal to the compressed air cleanliness characterization value, the controller does not act.

[0044] Furthermore, in step 3, during the operation of the individual clean air supply unit, the flow rate of the flow regulating device is adjusted according to the different user conditions to obtain an airflow supply flow rate that meets the needs of the user. By adjusting the flow rate of the flow regulating device according to the different user conditions, the flow rate of the airflow can be effectively balanced by the flow regulating device, which can help improve the comfort during breathing.

[0045] In the present invention, the fresh air quality on the upstream side of the local ventilator is first monitored by using the fresh air flow monitoring component 1, and the compressed air quality in the underground compressed air pipeline is monitored by using the fresh air flow monitoring component 2, so that the air quality of the fresh air flow and the compressed air flow can be obtained in advance, and then it is convenient to compare the air quality of the fresh air and the compressed air, so that it is convenient to switch the fresh air or the compressed air as the wind source of the fresh air filter according to the comparison result, thereby ensuring the stability and reliability of the ultra-clean air supply process. In addition, when the air quality of the fresh air and the compressed air is abnormally bad, an alarm signal is directly sent to the remote terminal, which can timely remind relevant personnel to take effective countermeasures. On the one hand, when the air quality of the fresh air flow is abnormally bad, even if it is filtered by the fresh air filter, it still cannot meet the standard for breathing, which will seriously damage the health of the user. On the other hand, when the CH4 concentration data in the fresh air flow is too high, there may be a risk of explosion. By timely performing the warning action, accidents can be effectively avoided, and the safety of personnel and property can be ensured to the maximum extent. In the process of using compressed air for air supply, the compressed air in the underground compressed air pipeline can be directly used as the wind source, which is beneficial to reducing energy. In the process of using fresh air for air supply, the fresh airflow in the air supply tunnel is guided to the air supply duct by a local fan to ensure the efficiency of air source supply. The negative pressure provided by the air pump of the fresh air device is then used to guide the fresh airflow in the air supply duct to the multi-stage filter assembly in the fresh air filter, and the dust in the fresh airflow can be quickly and efficiently filtered out by multi-stage filtration. A carbon monoxide absorption device is set on the air inlet side of the air pump of the fresh air device, which can quickly and efficiently remove carbon monoxide in the filtered fresh airflow, thereby obtaining ultra-clean fresh air that meets breathing needs. The front-end metal screen, the middle-end metal screen, and the high-precision composite filtering mechanism in the fresh air filter are used to perform triple progressive graded deep purification on the fresh air flow. The particles of different particle sizes in the fresh air flow can be fully filtered step by step in the way of "pre-filtration-strong filtration-deep purification", ensuring that various particles in the air can be efficiently filtered out layer by layer from large to small, and can effectively reduce wind resistance and ensure the flow rate of the fresh air flow. Through the setting of the carbon monoxide absorption device, the carbon monoxide in the filtered fresh air flow can be quickly and efficiently removed, further improving the effect of air purification, so that ultra-clean fresh air can be obtained, effectively protecting the personal health of the breathing individual, and preventing the occurrence of carboxyhemoglobinemia in underground workers. The ultra-clean air flow monitoring component is used to monitor the air quality of the ultra-clean fresh air on the downstream side of the air pump of the fresh air device, and it is compared with the air purification quality threshold. On the one hand, it can be perceived in real time whether the quality of the ultra-clean fresh air after purification can meet the use requirements, and on the other hand, it is conducive to timely monitoring of the damage of the fresh air filter.When the quality of fresh air is found to be deteriorating, the microprocessor is used to control the alarm module to issue an alarm action. At the same time, the microprocessor can also be used to send an alarm signal to the controller, which can facilitate the timely cessation of the ultra-clean air supply operation, thereby avoiding the delivery of toxic and harmful gases to the workers, further ensuring the reliability and safety of the air supply process, and providing reliable protection for the personal health of the workers.

[0046] This method has a high degree of automation, good safety and high reliability. It can stably and efficiently provide purified fresh air supply services for individuals with a small working radius and relatively fixed working positions in the underground working space. It can effectively protect the personal health of underground workers and help improve the safety factor of underground operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic diagram of the structure of the present invention;

[0048] Figure 2 It is a structural schematic diagram of the fresh air filter in the present invention;

[0049] Figure 3 It is a structural schematic diagram of the high-precision composite filtering mechanism in the present invention;

[0050] Figure 4 It is a structural schematic diagram of the filter element in the present invention;

[0051] Figure 5 It is a structural schematic diagram of a respiratory mask in the present invention.

[0052] In the figure: 1. air supply tunnel, 2. fresh air flow, 3. heading tunnel, 4. heading machine, 5. local ventilator, 6. air supply duct, 7. roof support mesh, 8. dirty air flow, 9. fresh air flow monitoring component 1, 10. fresh air filter, 1001. outer shell, 1002. primary air inlet, 1003. front metal screen, 1004. middle metal screen, 1005. high-precision composite filtering mechanism, 1006. carbon monoxide absorption device, 1007. ultra-clean air flow air supply pipe, 1008. fresh air device air pump, 1009, ultra-clean air flow monitoring component 1, 1010, microprocessor, 1011, ultra-clean air flow chamber, 1012, individual air outlet interface, 1013, one-way valve, 1014, flow control device, 1015. pressure relief valve, 1016. air inlet, 1017. filter housing, 1018. alarm module, 1019. individual clean air supply unit, 1020. individual air supply pipeline, 1021. breathing mask, 1022. ultra-clean airflow monitoring component 2, 1023. branch ventilation duct, 1024. branch interface, 1025. air inlet pipe of fresh air device, 1026. fresh air device fan, 1027. filter cartridge, 1028. filter element, 1029. guide plate, 1030. pleated unit, 1031. mask body, 1032. suction valve, 1033. breathing valve, 1034. air outlet, 1035. air inlet control valve, 11. underground compressed air pipeline, 12. air duct supply pipeline, 13. compressed air control valve. DETAILED DESCRIPTION

[0053] The present invention will be further described below in conjunction with the accompanying drawings.

[0054] like Figures 1 to 5 As shown, the present invention provides a mine ultra-clean fresh air individual supply protection system, including a heading tunnel 3, an air supply tunnel 1, an ultra-clean fresh air supply mechanism and a controller;

[0055] The air inlet end of the air supply tunnel 1 starts from the main ventilation shaft or main air tunnel at the mine entrance, and the air outlet end thereof runs through the entire mine longitudinally and is connected with each excavation tunnel 3;

[0056] The ultra-clean fresh air supply mechanism includes a main air supply unit and a fresh air filter 10;

[0057] The main air supply unit includes an air supply duct 6, a local ventilator 5 and a fresh air flow monitoring component 9; the air inlet end of the air supply duct 6 is located in the air supply tunnel 1, and its air outlet section extends along the length direction of the excavation tunnel 3; the local ventilator 5 is installed at the air inlet end of the air supply duct 6;

[0058] As a preferred embodiment, the negative supply tube 6 is a pipe made of pressure-resistant, wear-resistant and anti-static materials, and it can also have a certain ductility to better adapt to different working environments.

[0059] As a preference, a cyclone separator is also provided at the air inlet end of the air supply duct 6. The cyclone separator is located on the upstream side of the local ventilator 5. It can separate large particles in the fresh air flow from the air flow by utilizing the principle of centrifugation, so that these large-size particles will not enter the subsequent filter components, thereby ensuring the filtration efficiency of the subsequent filter components. At the same time, it is helpful to avoid the excessive wind resistance caused by the adhesion of large particles to the filter components.

[0060] The fresh air flow monitoring component 9 is installed inside the air supply duct 6 and is located on the air inlet side of the local ventilator 5; the fresh air flow monitoring component 9 includes a temperature and humidity monitoring module 1, a particle concentration monitoring module 1 and a multi-dimensional air pollutant monitoring module 1, the temperature and humidity monitoring module 1 is used to collect the temperature and humidity signal 1 at the location in real time, the particle concentration monitoring module 1 is used to collect the particle concentration signal 1 at the location in real time, and the multi-dimensional air pollutant monitoring module 1 is internally integrated with a CO sensor 1, a NO sensor 1, a CH4 sensor 1, a CO2 sensor 1 and a TVOC sensor 1, which are used to collect the CO concentration signal 1, the NO concentration signal 1, the CH4 concentration signal 1, the CO2 concentration signal 1 and the TVOC concentration signal 1 at the location in real time;

[0061] The number of the fresh air filter 10 is one or more, which is suspended in the excavation tunnel 3 and located above the excavator 4; the fresh air filter 10 includes an outer shell 1001, a multi-stage filtering component, a fresh air device air inlet pipe 1025, an ultra-clean air flow chamber 1011, an ultra-clean air flow air supply pipe 1007, a carbon monoxide absorption device 1006, a fresh air device air pump 1008, an ultra-clean air flow monitoring component 1009, an individual clean air supply unit 1019, an alarm module 1018 and a microprocessor 1010;

[0062] The multi-stage filter assembly is installed inside the outer shell 1001, and includes a filter shell 1017, a front-end metal screen 1003, a middle-end metal screen 1004 and a high-precision composite filter mechanism 1005; one end of the filter shell 1017 is provided with a first-level air inlet 1002, and the other end is provided with a first-level air outlet; the filtering accuracies of the front-end metal screen 1003, the middle-end metal screen 1004 and the high-precision composite filter mechanism 1005 increase successively, and are installed in the filter shell 1017 in sequence from the air inlet side to the air outlet side; wherein, the high-precision composite filter mechanism 1005 can effectively filter out fine particulate matter (such as PM2.5).

[0063] The air inlet end of the fresh air device air inlet pipe 1025 is connected to the air outlet end of the air supply tube 6, and an air inlet control valve 1035 is connected in series in the middle section, and the air outlet end thereof penetrates into the interior of the outer shell 1001 and is connected to the primary air inlet 1002;

[0064] The ultra-clean air flow chamber 1011 is installed inside the outer shell 1001, and is provided with a secondary air inlet and a plurality of individual air outlet interfaces 1012 connected to the inner cavity thereof;

[0065] The air inlet end of the ultra-clean air flow supply pipe 1007 is connected to the primary air outlet, and the air outlet end thereof is connected to the secondary air inlet;

[0066] The carbon monoxide absorption device 1006 is connected in series to the air inlet side of the ultra-clean air flow supply pipe 1007;

[0067] The fresh air device air pump 1008 is connected in series to the air outlet side of the ultra-clean air flow supply pipe 1007;

[0068] The ultra-clean airflow monitoring component 1009 is installed inside the ultra-clean airflow supply pipe 1007 and is located on the air outlet side of the fresh air device air pump 1008; the ultra-clean airflow monitoring component 1009 includes a temperature and humidity monitoring module 3, a particle concentration monitoring module 3 and a multi-dimensional air pollutant monitoring module 3, the temperature and humidity monitoring module 3 is used to collect the temperature and humidity signal 3 at the location in real time, the particle concentration monitoring module 3 is used to collect the particle concentration signal 3 at the location in real time, and the multi-dimensional air pollutant monitoring module 3 is internally integrated with a CO sensor 3, a NO sensor 3, a CH4 sensor 3, a CO2 sensor 3 and a TVOC sensor 3, which are used to collect the CO concentration signal 3, the NO concentration signal 3, the CH4 concentration signal 3, the CO2 concentration signal 3 and the TVOC concentration signal 3 at the location in real time;

[0069] Multiple individual clean air supply units 1019 correspond to multiple individual air outlet interfaces 1012, and the individual clean air supply units 1019 include individual air supply pipelines 1020, one-way valves 1013, flow regulating devices 1014 and breathing masks 1021. The air inlet end of the individual air supply pipeline 1020 penetrates into the interior of the outer shell 1001 and is connected to the corresponding individual air outlet interface 1012; the one-way valve 1013 is serially connected to the air inlet section of the individual air supply pipeline 1020; the flow regulating device 1014 is serially connected to the middle section of the individual air supply pipeline 1020; the breathing mask 1021 is connected to the air outlet end of the individual air supply pipeline 1020; as a preferred embodiment, the individual air supply pipeline 1020 is a hose, which can ensure that workers wearing breathing masks 1021 can move more flexibly within a certain range.

[0070] The alarm module 1018 is installed outside the outer shell 1001;

[0071] The microprocessor 1010 is installed inside the outer shell 1001 and is respectively connected to the air inlet control valve 1035, the fresh air device air pump 1008, the ultra-clean air flow monitoring component 1009, the flow regulating device 1014 and the alarm module 1018;

[0072] The controller is respectively connected to the fresh air flow monitoring component 9, the local ventilator 5 and the microprocessor 1010. As a preferred embodiment, the controller can be installed on the air supply cylinder 6 or can be installed outside the outer shell 1001, which can be a PLC controller.

[0073] In order to fully ensure the safety and reliability of underground air supply operations, the ultra-clean fresh air supply mechanism also includes a second air supply unit;

[0074] The second air supply unit includes an underground compressed air pipeline 11, an air duct supply pipeline 12, a fresh air flow monitoring component 2 and a compressed air control valve 13; the underground compressed air pipeline 11 is connected to the underground mine compressed air system, and the air inlet end of the air duct supply pipeline 12 is connected to the underground compressed air pipeline 11; the fresh air flow monitoring component 2 is installed inside the middle section of the air duct supply pipeline 12, and the fresh air flow monitoring component 2 includes a temperature and humidity monitoring module 2, a particle concentration monitoring module 2 and a multi-dimensional air pollutant monitoring module 2, and the temperature and humidity monitoring module 2 is used to collect the real-time information of the local The second temperature and humidity signal at the location, the second particle concentration monitoring module is used to collect the second particle concentration signal at the location in real time, the second multi-dimensional air pollutant monitoring module is internally integrated with a second CO sensor, a second NO sensor, a second CH4 sensor, a second CO2 sensor and a second TVOC sensor, and is used to collect the second CO concentration signal, the second NO concentration signal, the second CH4 concentration signal, the second CO2 concentration signal and the second TVOC concentration signal at the location in real time; the compressed air control valve 13 is connected in series to the air outlet end of the air duct supply line 12;

[0075] The air inlet end of the fresh air device air inlet pipe 1025 is connected to the air outlet end of the air supply cylinder 6 and the air outlet end of the air duct air supply line 12 through an electric three-way valve;

[0076] The controller is also connected to the fresh air flow monitoring component 2, the electric three-way valve and the compressed air control valve 13. In this way, two ways of supplying air can be provided as the air source for the fresh air filter, so that when a local ventilator fails or when the air quality of the fresh air flow is poor, the compressed air in the underground compressed air pipeline can be used as the air source for the fresh air filter, which can effectively ensure the stability and reliability of the underground ultra-clean air supply. The fresh air flow monitoring component 2 is set in the air duct supply pipeline connected to the underground compressed air pipeline. The fresh air flow monitoring component 2 can be used to more comprehensively detect the quality of the compressed air, and further can be compared by comparing the quality of the compressed air and the quality of the fresh air. On this basis, the air inlet end of the air inlet pipe of the fresh air device is connected to the air outlet end of the air supply cylinder and the air outlet end of the air duct supply pipeline through the electric three-way valve, which can facilitate the controller to quickly switch the air supply source according to the comparison result, further improving the reliability of the air supply process.

[0077] In order to facilitate the installation of the air supply duct and to avoid the air supply duct from interfering with other operating equipment, a roof support mesh 7 is arranged on the top of the excavation tunnel 3, and the air supply duct 6 is connected to the bottom of the roof support mesh 7 through a connecting piece.

[0078] In order to conveniently transport the ultra-clean fresh air to a distant place so as to expand the function of the protection system, a secondary air outlet is also provided on the ultra-clean air flow chamber 1011; the fresh air filter also includes a branch ventilation duct 1023, a fresh air device fan 1026 and an ultra-clean air flow monitoring component 1022, the air inlet end of the branch ventilation duct 1023 penetrates into the interior of the outer shell 1001 and is connected to the secondary air outlet, and a plurality of branch interfaces 1024 are connected to the pipe body at intervals; the fresh air device fan 1026 is connected to the microprocessor 1010, which is serially connected to the air inlet end of the branch ventilation duct 1023; the ultra-clean air flow monitoring component 1022 is connected to the microprocessor 1010, which is installed in the branch ventilation duct 10 23, and located at the outlet side of the fresh air device fan 1026, the ultra-clean air flow monitoring component 2 1022 includes a temperature and humidity monitoring module 4, a temperature and humidity monitoring module 4 and a multi-dimensional air pollutant monitoring module 4, the temperature and humidity monitoring module 4 is used to collect the temperature and humidity signal 4 at the location in real time, the temperature and humidity monitoring module 4 is used to collect the particle concentration signal 4 at the location in real time, and the multi-dimensional air pollutant monitoring module 4 is internally integrated with a CO sensor 4, a NO sensor 4, a CH4 sensor 4, a CO2 sensor 4 and a TVOC sensor 4, which are used to collect the CO concentration signal 4, the NO concentration signal 4, the CH4 concentration signal 4, the CO2 concentration signal 4 and the TVOC concentration signal 4 at the location in real time. By arranging the fresh air device fan in the branch ventilation duct, it is convenient to transport the ultra-clean fresh air in the ultra-clean air flow bin to a farther location, so as to meet the breathing needs of people at a location far away from the fresh air filter. The microprocessor obtains temperature and humidity data three, particulate matter concentration data three, CO concentration data three, NO concentration data three, CH4 concentration data three, CO2 concentration data three and TVOC concentration data three according to temperature and humidity monitoring module four, temperature and humidity monitoring module four, CO concentration signal four, NO concentration signal four, CH4 concentration signal four, CO2 concentration data three and TVOC concentration data three, and integrates each monitoring data to obtain air quality characterization value three of ultra-clean fresh air, and compares it with the air purification quality threshold value. When the air quality characterization value three is less than the air purification quality threshold value, the alarm module is controlled to perform an alarm action, and at the same time, the fan of the fresh air device is controlled to stop working. By setting an ultra-clean airflow monitoring component two in the branch ventilation duct, the microprocessor can monitor the quality of ultra-clean fresh air in the branch ventilation duct in real time, thereby ensuring the air quality of the ultra-clean fresh air in the branch ventilation duct. At the same time, it is also beneficial to timely monitor whether there is polluted air entering the branch ventilation duct, which can avoid the occurrence of transport air quality pollution due to damage of the branch ventilation duct.

[0079] As a preferred embodiment, the particle concentration monitoring modules 1, 2 and 3 can all be monitored based on the light scattering principle, which can perform statistical calculations on the particle size and thus obtain the particle concentration;

[0080] In order to ensure the filtering effect and filtering efficiency, the high-precision composite filtering mechanism 1005 includes a filter cartridge 1027, a filter element 1028 and a guide plate 1029; a plurality of mesh holes are opened on the body of the filter cartridge 1027 all over the surface; the filter element 1028 is inserted into the interior of the filter cartridge 1027; the filter element 1028 is a hollow cylindrical continuous pleated filter material, and the pleated filter material is a three-layer structure, which is a coarse-effect filter layer, a medium-effect filter layer and a high-efficiency filter layer from the outside to the inside, and at the same time, the continuous pleated filter material is composed of a plurality of pleated units 1030 connected in sequence, and the cross-section of each pleated unit 1030 is trapezoidal; the guide plate 1029 is located in the annular area between the filter cartridge 1027 and the filter element 1028, and is spirally wound around the outside of the filter element 1028. Several pleated units can guide and disperse the passing airflow more evenly and effectively, so that the airflow can have more directional changes when passing through the filter element. The multi-directional airflow path significantly increases the probability of particles in the airflow contacting the filter material, thereby improving the capture efficiency of particles. At the same time, the dispersed airflow path avoids pressure concentration at any single position, which helps to reduce the resistance of the airflow. The setting of the spiral guide plate is conducive to making the airflow entering the fresh air filter more evenly distributed on the surface of the filter element, so that all parts of the filter element can be fully utilized, fully increasing the effective filtration area, and helping to increase the service life of the fresh air filter.

[0081] As a further preference, the coarse filter layer can be made of durable fiber materials through electrostatic spinning technology, which is used to capture relatively large particles in ultrafine particles, and ensure low airflow resistance, fully protect subsequent filter layers, and extend the service life of the entire filter mechanism; as a further preference, the medium filter layer can be made of electret material with permanent static charge, which can use electrostatic action to capture relatively small particles in ultrafine particles, further enhance the particle capture ability, and do not significantly increase airflow resistance; as a further preference, the high-efficiency filter layer can be made of electret and nanofiber materials through electrostatic spinning technology, which can achieve high-precision and deep filtration, can capture extremely small particles in ultrafine particles, and has a stable structure and a long service life; making the filter element a hollow cylindrical continuous pleated filter material can significantly increase the filtration area and dust volume of the filter material in a limited area, which is conducive to extending the effective use time of the filter element;

[0082] As a preferred embodiment, the breathing mask 1021 includes a mask body 1031, an inhalation valve 1032 and an exhalation valve 1033; the mask body 1031 has a breathing cavity inside, and its rear side is an open structure adapted to the face, and the open part is surrounded by a silicone material; an air outlet 1034 is provided at the lower front part of the mask body 1031, and an air inlet 1016 is provided at the upper front part; the mask body 1031 is connected to an air circuit connector at the outer periphery of the front side of the air inlet 1016; the air circuit connector is connected to the air outlet end of the individual air supply pipeline 1020 through a flexible pipeline; the inhalation valve 1032 is installed in the air inlet 1016; the exhalation valve 1033 is installed in the air outlet 1034. Further preferably, two ears can be symmetrically arranged on both side ends of the mask body 1031 for fixing the wearing rope or elastic band. By fixing the wearing rope or elastic band, it can be ensured that the mask body can be stably connected to the wearer's face.

[0083] In order to avoid excessive internal pressure in the ultra-clean airflow chamber, the fresh air filter also includes a pressure relief valve 1015. The inlet end of the pressure relief valve 1015 passes through the outer shell 1001 and is connected to the ultra-clean airflow chamber 1011, and the outlet end is connected to the external atmosphere.

[0084] As a preferred embodiment, the air inlet end of the air supply tube 6 is located at the upstream side of the fresh air flow direction in the air supply tunnel 1. In this way, it can be ensured that the fresh air flow in the air supply tunnel 1 can provide negative pressure for the excavation tunnel 3, thereby facilitating the rapid removal of the polluted air flow 8 generated in the excavation tunnel and the gas exhaled by the workers.

[0085] In the present invention, the air inlet end of the air supply duct is located in the air supply tunnel, and the air outlet section is extended along the length direction of the excavation tunnel, which can provide a wind source access point with an appropriate distance for each specific excavation tunnel, thereby improving the convenience of the air supply access process of the working face. At the same time, a local ventilator is installed at the air inlet end of the air supply duct, so that the local ventilator can be used to transport the fresh air flow in the excavation tunnel through the air supply duct to the excavation tunnel, thereby facilitating the provision of a fresh air source for the working face; a fresh air flow monitoring component 1 connected to the controller is set at the air inlet end of the air supply duct, and the fresh air flow monitoring component 1 includes a temperature and humidity monitoring module 1, a particulate matter concentration monitoring module 1 and a multi-dimensional air pollutant monitoring module 1, which can facilitate a more comprehensive quality detection of the fresh air flow, so that when the pollution level of the fresh air flow is greater than the air pollution quality threshold, an alarm signal can be promptly sent to the remote terminal, so that relevant personnel can be reminded to check the air source in time and take effective countermeasures to avoid the situation where the fresh air flow quality is too poor and still cannot meet the use requirements even after filtering by the fresh air filter. Therefore, it can not only effectively ensure the safety of the user's personal health, but also avoid the situation where the service life of the fresh air filter is sharply reduced due to filtering the fresh air flow with a high degree of pollution. One or more fresh air filters are arranged above the tunnel boring machine, and a centralized filtering node can be formed in the tunnel boring face. In this way, not only the breathing scheme of using only single masks for dust prevention in the underground of the traditional technology is changed, but also the fresh air filter with better filtering effect and efficiency than the traditional single mask can be used to centrally and efficiently realize the air purification operation, so that ultra-clean fresh air can be supplied to multiple individuals in the tunnel boring face at the same time, which greatly ensures the filtering effect and can effectively ensure the personal health and safety of miners. The primary air inlet of the filter housing is connected to the air outlet end of the air supply tube through the air inlet pipe of the fresh air device, so that the fresh air flow entering the air supply tube can be easily guided to the fresh air filter by using the air inlet pipe of the fresh air device. In this way, the fresh air flow in the air supply tunnel can be used as the air inlet of the fresh air filter instead of the polluted air flow in the tunnel boring tunnel, which is conducive to ensuring the subsequent air purification effect. The front-end metal screen, the middle-end metal screen and the high-precision composite filter mechanism are arranged in sequence in the filter shell of the multi-stage filter assembly, and the filtering effect on the fresh airflow can be significantly improved by multi-stage filtering. The filtering accuracy of the front-end metal screen is made smaller than that of the middle-end metal screen, and the front-end metal screen can be used to intercept and filter out the particles with larger particle sizes, and then the middle-end metal screen can be used to intercept and filter out the particles with smaller particle sizes. In this way, it is ensured that the particles with larger particle sizes will not directly enter the middle-end metal screen, and that the particles with smaller particle sizes will not directly enter the high-precision composite filter mechanism, thereby ensuring the filtering effect and filtering efficiency of the middle-end metal screen on the particles with smaller particle sizes, and at the same time, ensuring the filtering effect and filtering efficiency of the high-precision composite filter mechanism on the fine or ultrafine particle sizes.Thus, a triple progressive graded deep purification effect can be achieved through the front metal screen, the middle metal screen and the high-precision composite filtering mechanism, namely "pre-filtration-strong filtration-deep purification". By fully filtering the particles of different particle sizes in the air flow step by step, it is ensured that various particles in the air can be filtered out layer by layer from large to small, which significantly improves the air purification effect, thereby achieving the purpose of deep purification and effectively protecting the health of the breathing individual. An ultra-clean air flow warehouse is set in the outer shell, and the ultra-clean air flow warehouse is connected to the filter shell through the ultra-clean air flow air supply pipe, and then the carbon monoxide absorption device, the fresh air device air pump and the ultra-clean air flow monitoring component are connected in sequence from the air inlet side to the air outlet side in the ultra-clean air flow air supply pipe. The fresh air device air pump can provide negative pressure so that the filtered fresh air flow quickly passes through the carbon monoxide absorption device and enters the ultra-clean air flow warehouse. In this process, the carbon monoxide absorption device can efficiently remove the carbon monoxide in the filtered fresh air flow, thereby forming ultra-clean fresh air. The ultra-clean airflow bin can not only store a certain amount of ultra-clean fresh air, but also help to form a buffering effect on the ultra-clean fresh air, thereby ensuring that the output ultra-clean fresh air can have a stable flow rate. Through the setting of the ultra-clean airflow monitoring component one, it is convenient to monitor the quality of the ultra-clean fresh air, and thus timely discover the situation where the ultra-clean fresh air quality is unqualified. In the ultra-clean airflow monitoring component one, a temperature and humidity monitoring module three, a particle concentration monitoring module three and a multi-dimensional air pollutant monitoring module three are set, which can comprehensively and reliably monitor the quality of the fresh air, thereby effectively ensuring the quality of the fresh air supplied to the breathing individual. At the same time, since the ultra-clean airflow monitoring component one is connected to the ultra-clean airflow bin, the ultra-clean airflow monitoring component one can also detect whether the air quality in the ultra-clean airflow bin is polluted, so that the damage of the fresh air filter can be discovered in time, further ensuring the safety and reliability of use. By setting the microprocessor module and the alarm module, it is helpful to control the alarm module to perform warning actions in time when the monitoring data exceeds the monitoring threshold, so as to remind relevant personnel to check and repair the fresh air filter or air source in time. At the same time, it can also help managers to find the situation of dangerous gas exceeding the standard in time, which can help to avoid the occurrence of safety accidents. The air inlet end of the individual air supply pipeline is inserted into the interior of the outer shell and connected with the corresponding individual air outlet interface. At the same time, the breathing mask is connected to the air outlet end of the individual air supply pipeline. The individual air supply pipeline can be used to supply the ultra-clean fresh air in the ultra-clean air flow warehouse to a specific working position, so that workers with a small operating radius and a relatively fixed working position can use it. By setting a one-way valve in the individual air supply pipeline, it can be ensured that the ultra-clean air in the ultra-clean air flow warehouse can only be output to the outside in one direction, and the air near the excavation face or the working face will not enter the ultra-clean air flow warehouse through the individual air supply pipeline. Thus, the problem of air pollution in the ultra-clean air flow warehouse caused by backflow is avoided, and the safety and reliability of the system are further improved.By setting up the flow regulating device, the flow regulating device can be used to smooth the airflow passing through, and the airflow flow in the individual air supply duct can be adjusted in real time, thereby providing a corresponding personalized clean air supply rate according to the actual breathing frequency and breathing volume of the workers, avoiding insufficient or excessive air supply, and improving the breathing comfort and safety of individual users.

[0086] The system is easy to operate, simple to maintain, has ideal filtering effect, good stability, good flexibility, high versatility, and can flexibly adapt to different working environments. Through the use of this system, the air can be purified centrally and efficiently, the filtering effect can be improved to 99.99%, and the purified fresh air can be directly delivered to the area where the workers are located, ensuring that each working surface can obtain clean air, and can realize personalized clean air supply for each worker, thereby significantly improving the quality of air for workers to breathe, providing reliable health protection for workers working underground, completely solving the problem of pneumoconiosis, and helping to improve safety during the operation process. At the same time, the system is highly flexible and adaptable, can meet the use requirements under the changing working environment and conditions in the mine, and is suitable for supplying purified air to workers with a small working activity radius and relatively fixed working positions.

[0087] The present invention also provides a method for protecting individual supply of ultra-clean fresh air for mining, which adopts an individual supply protection system for ultra-clean fresh air for mining, and comprises the following steps:

[0088] Step 1: Use the fresh air flow monitoring component 9 to monitor the fresh air quality on the upstream side of the local ventilator 5, and send the collected temperature and humidity signal 1, particulate matter concentration signal 1, CO concentration signal 1, NO concentration signal 1, CH4 concentration signal 1, CO2 concentration signal 1 and TVOC concentration signal 1 to the controller. The controller obtains temperature and humidity data 1, particulate matter concentration data 1, CO concentration data 1, NO concentration data 1, CH4 concentration data 1, CO2 concentration data 1 and TVOC concentration data 1 according to the temperature and humidity signal 1, particulate matter concentration signal 1, CO concentration signal 1, NO concentration signal 1, CH4 concentration signal 1, CO2 concentration data 1 and TVOC concentration signal 1, and integrates the various monitoring data to obtain the fresh air cleanliness characterization value of the fresh air flow 2;

[0089] The quality of compressed air in the underground compressed air pipeline 11 is monitored by using the second fresh air flow monitoring component, and the collected temperature and humidity signal 2, particulate matter concentration signal 2, CO concentration signal 2, NO concentration signal 2, CH4 concentration signal 2, CO2 concentration signal 2 and TVOC concentration signal 2 are sent to the controller. The controller obtains temperature and humidity data 2, particulate matter concentration data 2, CO concentration data 2, NO concentration data 2, CH4 concentration data 2, CO2 concentration data 2 and TVOC concentration data 2 according to the second temperature and humidity signal, the second particulate matter concentration signal, the second CO concentration signal, the second NO concentration signal, the second CH4 concentration signal, the second CO2 concentration signal and the second TVOC concentration signal, and integrates each monitoring data to obtain a compressed air cleanliness characterization value;

[0090] The controller compares and analyzes the fresh air cleanliness characterization value and the compressed air cleanliness characterization value; when the fresh air cleanliness characterization value and the compressed air cleanliness characterization value are both lower than the set cleanliness threshold and cannot meet the use requirements, the controller sends an alarm signal to the remote terminal connected to it; when the fresh air cleanliness characterization value is greater than the compressed air cleanliness characterization value, the controller controls the electric three-way valve to connect the fresh air device air inlet pipe 1025 and the air supply duct 6, and executes step two; when the fresh air cleanliness characterization value is less than the compressed air cleanliness characterization value, the controller controls the electric three-way valve to connect the fresh air device air inlet pipe 1025 and the air duct supply line 12, and executes step three; when the fresh air cleanliness characterization value is equal to the compressed air cleanliness characterization value, the state of the electric three-way valve is kept unchanged. If the current electric three-way valve connects the fresh air device air inlet pipe 1025 and the air supply duct 6, step two is executed; if the current electric three-way valve connects the fresh air device air inlet pipe 1025 and the air duct supply line 12, step three is executed;

[0091] Step 2: The controller controls the local ventilator 5 to start working, and the microprocessor 1010 controls the air inlet control valve 1035 to open, and the local ventilator 5 is used to introduce the fresh air flow 2 in the air supply tunnel 1 into the air supply tube 6, and then supply it to the fresh air device air pump 1008;

[0092] Step 3: The controller sends a start signal to the microprocessor 1010. After receiving the start signal, the microprocessor 1010 controls the fresh air device air pump 1008 to start working, and controls the flow regulating device 1014 in the individual clean air supply unit 1019 to open, and provides negative pressure to the filter housing 1017 through the fresh air device air pump 1008, so as to introduce the fresh air flow 2 into the filter housing 1017, and sequentially uses the front-end metal screen 1003, the middle-end metal screen 1004 and the high-precision composite filtering mechanism 1005 to perform triple progressive graded depth purification treatment on the fresh air flow 2, and then uses the carbon monoxide absorption device 1006 to remove carbon monoxide in the fresh air flow 2 to obtain ultra-clean fresh air; through the action of the fresh air device air pump 1008, the ultra-clean fresh air enters the ultra-clean air flow warehouse 1011, and enters the breathing mask 1021 through the one-way valve 1013 and the flow regulating device 1014 in the individual clean air supply unit 1019;

[0093] At the same time, the ultra-clean airflow monitoring component 1009 is used to monitor the ultra-clean fresh air quality on the downstream side of the fresh air device air pump 1008, and the collected temperature and humidity signal 3, particulate matter concentration signal 3, CO concentration signal 3, NO concentration signal 3, CH4 concentration signal 3, CO2 concentration signal 3 and TVOC concentration signal 3 are sent to the microprocessor 1010. The microprocessor 1010 obtains temperature and humidity data 2, particulate matter concentration data 2, CO concentration data 2, NO concentration data 2, CH4 concentration data 2, CO2 concentration data 2 and TVOC concentration data 2 according to the temperature and humidity signal 3, particulate matter concentration signal 3, CO concentration signal 3, NO concentration signal 3, CH4 concentration signal 3, CO2 concentration data 2 and TVOC concentration data 2, and integrates them into the microprocessor 1010. The air cleanliness characterization value 1 of the ultra-clean fresh air is obtained by combining various monitoring data. At the same time, the air cleanliness characterization value 1 is compared with the set air purification quality threshold. When the air cleanliness characterization value 1 is greater than or equal to the air purification quality threshold, the microprocessor 1010 does not send an action signal. When the air cleanliness characterization value 1 is less than the air purification quality threshold, the microprocessor 1010 controls the alarm module 1018 to perform an alarm action. At the same time, the air inlet control valve 1035 is controlled to be closed, the air pump 1008 of the fresh air device is controlled to stop working, and the flow regulating device 1014 is controlled to be closed. At the same time, the microprocessor 1010 sends an alarm signal to the controller. After receiving the alarm signal from the microprocessor 1010, the controller sends an alarm signal to the remote terminal connected thereto.

[0094] At the same time, the controller compares and analyzes the fresh air cleanliness characterization value and the compressed air cleanliness characterization value. When the fresh air cleanliness characterization value and the compressed air cleanliness characterization value are both lower than the set cleanliness threshold and cannot meet the use requirements, the controller sends an alarm signal to the remote terminal connected to it, and sends an alarm signal to the microprocessor 1010. After receiving the alarm signal from the controller, the microprocessor 1010 controls the alarm module 1018 to perform an alarm action. At the same time, the air inlet control valve 1035 is controlled to be closed, the fresh air device air pump 1008 is controlled to stop working, and the flow regulating device 1014 is controlled to be closed. When the fresh air cleanliness characterization value is greater than the set cleanliness threshold and the compressed air cleanliness characterization value at the same time, the controller controls the local ventilator 5 to start working and controls the electric three-way valve to connect the fresh air device air inlet pipe 1025 and the air supply tube 6. When the fresh air cleanliness characterization value is less than the compressed air cleanliness characterization value, the controller controls the electric three-way valve to connect the fresh air device air inlet pipe 1025 and the air duct supply pipe 12. When the fresh air cleanliness characterization value is equal to the compressed air cleanliness characterization value, the controller does not act.

[0095] As a preferred embodiment, in step 3, during the operation of the individual clean air supply unit 1019, the flow rate of the flow regulating device 1014 is adjusted according to the different user conditions to obtain an airflow supply flow rate that meets the user's own needs. By adjusting the flow rate of the flow regulating device according to the different user conditions, the flow rate of the airflow can be effectively balanced by the flow regulating device, which can help improve the comfort during breathing.

[0096] In the present invention, the fresh air quality on the upstream side of the local ventilator is first monitored by using the fresh air flow monitoring component 1, and the compressed air quality in the underground compressed air pipeline is monitored by using the fresh air flow monitoring component 2, so that the air quality of the fresh air flow and the compressed air flow can be obtained in advance, and then it is convenient to compare the air quality of the fresh air and the compressed air, so that it is convenient to switch the fresh air or the compressed air as the wind source of the fresh air filter according to the comparison result, thereby ensuring the stability and reliability of the ultra-clean air supply process. In addition, when the air quality of the fresh air and the compressed air is abnormally bad, an alarm signal is directly sent to the remote terminal, which can timely remind relevant personnel to take effective countermeasures. On the one hand, when the air quality of the fresh air flow is abnormally bad, even if it is filtered by the fresh air filter, it still cannot meet the standard for breathing, which will seriously damage the health of the user. On the other hand, when the CH4 concentration data in the fresh air flow is too high, there may be a risk of explosion. By timely performing the warning action, accidents can be effectively avoided, and the safety of personnel and property can be ensured to the maximum extent. In the process of using compressed air for air supply, the compressed air in the underground compressed air pipeline can be directly used as the wind source, which is beneficial to reducing energy. In the process of using fresh air for air supply, the fresh airflow in the air supply tunnel is guided to the air supply duct by a local fan to ensure the efficiency of air source supply. The negative pressure provided by the air pump of the fresh air device is then used to guide the fresh airflow in the air supply duct to the multi-stage filter assembly in the fresh air filter, and the dust in the fresh airflow can be quickly and efficiently filtered out by multi-stage filtration. A carbon monoxide absorption device is set on the air inlet side of the air pump of the fresh air device, which can quickly and efficiently remove carbon monoxide in the filtered fresh airflow, thereby obtaining ultra-clean fresh air that meets breathing needs. The front-end metal screen, the middle-end metal screen, and the high-precision composite filtering mechanism in the fresh air filter are used to perform triple progressive graded deep purification on the fresh air flow. The particles of different particle sizes in the fresh air flow can be fully filtered step by step in the way of "pre-filtration-strong filtration-deep purification", ensuring that various particles in the air can be efficiently filtered out layer by layer from large to small, and can effectively reduce wind resistance and ensure the flow rate of the fresh air flow. Through the setting of the carbon monoxide absorption device, the carbon monoxide in the filtered fresh air flow can be quickly and efficiently removed, further improving the effect of air purification, so that ultra-clean fresh air can be obtained, effectively protecting the personal health of the breathing individual, and preventing the occurrence of carboxyhemoglobinemia in underground workers. The ultra-clean air flow monitoring component is used to monitor the air quality of the ultra-clean fresh air on the downstream side of the air pump of the fresh air device, and it is compared with the air purification quality threshold. On the one hand, it can be perceived in real time whether the quality of the ultra-clean fresh air after purification can meet the use requirements, and on the other hand, it is conducive to timely monitoring of the damage of the fresh air filter.When the quality of fresh air is found to be deteriorating, the microprocessor is used to control the alarm module to issue an alarm action. At the same time, the microprocessor can also be used to send an alarm signal to the controller, which can facilitate the timely cessation of the ultra-clean air supply operation, thereby avoiding the delivery of toxic and harmful gases to the workers, further ensuring the reliability and safety of the air supply process, and providing reliable protection for the personal health of the workers.

[0097] This method has a high degree of automation, good safety and high reliability. It can stably and efficiently provide purified fresh air supply services for individuals with a small working radius and relatively fixed working positions in the underground working space. It can effectively protect the personal health of underground workers and help improve the safety factor of underground operations.

Claims

1. A mine ultra-clean fresh air individual supply protection system, comprising an excavation tunnel (3) and an air supply tunnel (1), wherein the air inlet end of the air supply tunnel (1) starts from the main ventilation shaft or the main air chamber at the mine entrance, and the air outlet end thereof vertically runs through the entire mine and is connected to each excavation tunnel (3); It is characterized in that It also includes an ultra-clean fresh air supply mechanism and controller; The ultra-clean fresh air supply mechanism comprises a main air supply unit and a fresh air filter (10); The main air supply unit comprises an air supply duct (6), a local ventilator (5) and a fresh air flow monitoring component (9); the air inlet end of the air supply duct (6) is located in the air supply tunnel (1), and the air outlet section thereof extends along the length direction of the excavation tunnel (3); the local ventilator (5) is installed at the air inlet end of the air supply duct (6); the fresh air flow monitoring component (9) is installed inside the air supply duct (6) and is located on the air inlet side of the local ventilator (5); the fresh air flow monitoring component (9) comprises a temperature and humidity monitoring module (1), a particle concentration monitoring module (1) and a multi-dimensional space monitoring module (1). Air pollutant monitoring module 1, the temperature and humidity monitoring module 1 is used to collect the temperature and humidity signal 1 at the location in real time, the particle concentration monitoring module 1 is used to collect the particle concentration signal 1 at the location in real time, and the multi-dimensional air pollutant monitoring module 1 is internally integrated with a CO sensor 1, an NO sensor 1, a CH4 sensor 1, a CO2 sensor 1 and a TVOC sensor 1, and is used to collect the CO concentration signal 1, the NO concentration signal 1, the CH4 concentration signal 1, the CO2 concentration signal 1 and the TVOC concentration signal 1 at the location in real time; The number of the fresh air filter (10) is one or more, and the fresh air filter (10) is suspended in the excavation tunnel (3) and located above the excavator (4); the fresh air filter (10) comprises an outer shell (1001), a multi-stage filtering component, a fresh air device air inlet pipe (1025), an ultra-clean air flow chamber (1011), an ultra-clean air flow air supply pipe (1007), a carbon monoxide absorption device (1006), a fresh air device air pump (1008), an ultra-clean air flow monitoring component 1 (1009), an individual clean air supply unit (1019), an alarm module (1018) and a microprocessor (1010); The multi-stage filter assembly is installed inside the outer shell (1001), and comprises a filter shell (1017), a front-end metal screen (1003), a middle-end metal screen (1004), and a high-precision composite filter mechanism (1005); a first-level air inlet (1002) is provided at one end of the filter shell (1017), and a first-level air outlet is provided at the other end; the filtering accuracies of the front-end metal screen (1003), the middle-end metal screen (1004), and the high-precision composite filter mechanism (1005) are successively increased, and are successively installed in the filter shell (1017) at intervals from the air inlet side to the air outlet side; The air inlet end of the air inlet pipe (1025) of the fresh air device is connected to the air outlet end of the air supply tube (6), an air inlet control valve (1035) is connected in series in the middle section, and the air outlet end thereof penetrates into the interior of the outer shell (1001) and is connected to the primary air inlet (1002); The ultra-clean airflow chamber (1011) is installed inside the outer shell (1001), and is provided with a secondary air inlet and a plurality of individual air outlet interfaces (1012) which are connected to the inner cavity thereof; The air inlet end of the ultra-clean air flow supply pipe (1007) is connected to the primary air outlet, and the air outlet end thereof is connected to the secondary air inlet; The carbon monoxide absorption device (1006) is connected in series to the air inlet side of the ultra-clean air flow supply pipe (1007); The fresh air device air pump (1008) is connected in series to the air outlet side of the ultra-clean air flow supply pipe (1007); The ultra-clean airflow monitoring component 1 (1009) is installed inside the ultra-clean airflow supply pipe (1007) and is located on the air outlet side of the fresh air device air pump (1008); the ultra-clean airflow monitoring component 1 (1009) includes a temperature and humidity monitoring module 3, a particle concentration monitoring module 3 and a multi-dimensional air pollutant monitoring module 3, the temperature and humidity monitoring module 3 is used to collect the temperature and humidity signal 3 at the location in real time, the particle concentration monitoring module 3 is used to collect the particle concentration signal 3 at the location in real time, and the multi-dimensional air pollutant monitoring module 3 is internally integrated with a CO sensor 3, a NO sensor 3, a CH4 sensor 3, a CO2 sensor 3 and a TVOC sensor 3, and is used to collect the CO concentration signal 3, the NO concentration signal 3, the CH4 concentration signal 3, the CO2 concentration signal 3 and the TVOC concentration signal 3 at the location in real time; A plurality of individual clean air supply units (1019) correspond to a plurality of individual air outlet interfaces (1012); the individual clean air supply units (1019) comprise an individual air supply pipeline (1020), a one-way valve (1013), a flow regulating device (1014) and a breathing mask (1021); the air inlet end of the individual air supply pipeline (1020) penetrates into the interior of the outer shell (1001) and is connected to the corresponding individual air outlet interface (1012); the one-way valve (1013) is connected in series to the air inlet section of the individual air supply pipeline (1020); the flow regulating device (1014) is connected in series to the middle section of the individual air supply pipeline (1020); and the breathing mask (1021) is connected to the air outlet end of the individual air supply pipeline (1020); The alarm module (1018) is installed outside the outer shell (1001); The microprocessor (1010) is installed inside the outer shell (1001), and is respectively connected to the air inlet control valve (1035), the fresh air device air pump (1008), the ultra-clean air flow monitoring component 1 (1009), the flow regulating device (1014), and the alarm module (1018); The controller is respectively connected to the fresh air flow monitoring component 1 (9), the local ventilator (5) and the microprocessor (1010); The ultra-clean fresh air supply mechanism also includes a second air supply unit; The second air supply unit comprises an underground compressed air pipeline (11), an air duct air supply pipeline (12), a second fresh air flow monitoring component and an air pressure control valve (13); the air inlet end of the air duct air supply pipeline (12) is connected to the underground compressed air pipeline (11); the second fresh air flow monitoring component is installed inside the middle section of the air duct air supply pipeline (12); the second fresh air flow monitoring component comprises a second temperature and humidity monitoring module, a second particle concentration monitoring module and a second multi-dimensional air pollutant monitoring module; the second temperature and humidity monitoring module is used to collect temperature and humidity at the location in real time. The particle concentration monitoring module (13) is used to collect the particle concentration signal (14) at the location in real time. The multi-dimensional air pollutant monitoring module (13) is internally integrated with a CO sensor (14), a NO sensor (14), a CH4 sensor (14), a CO2 sensor (14) and a TVOC sensor (14) for collecting the CO concentration signal (14), the NO concentration signal (14), the CH4 concentration signal (14), the CO2 concentration signal (14) and the TVOC concentration signal (14) at the location in real time. The compressed air control valve (13) is connected in series to the air outlet end of the air duct supply line (12). The air inlet end of the air inlet pipe (1025) of the fresh air device is respectively connected to the air outlet end of the air supply cylinder (6) and the air outlet end of the air duct air supply pipeline (12) through an electric three-way valve; The controller is also connected to the second fresh air flow monitoring component, the electric three-way valve and the compressed air control valve (13).

2. The individual supply protection system for ultra-clean fresh air for mining according to claim 1 is characterized in that: A roof support mesh (7) is arranged at the top of the excavation tunnel (3), and the air supply duct (6) is connected to the bottom of the roof support mesh (7) via a connecting piece.

3. The individual supply protection system for ultra-clean fresh air for mining according to claim 2 is characterized in that: The ultra-clean airflow chamber (1011) is also provided with a secondary air outlet; the fresh air filter (10) further comprises a branch ventilation duct (1023), a fresh air device fan (1026) and an ultra-clean airflow monitoring component 2 (1022); the air inlet end of the branch ventilation duct (1023) penetrates into the interior of the outer shell (1001) and is connected to the secondary air outlet, and a plurality of branch interfaces (1024) are connected to the pipe body at intervals; the fresh air device fan (1026) is connected to the microprocessor (1010) and is connected in series to the air inlet end of the branch ventilation duct (1023); the ultra-clean airflow monitoring component 2 (1022) is connected to the microprocessor (1010) and is installed at the branch ventilation duct (1023); Inside, and located on the air outlet side of the fresh air device fan (1026), the ultra-clean airflow monitoring component 2 (1022) includes a temperature and humidity monitoring module 4, a temperature and humidity monitoring module 4 and a multi-dimensional air pollutant monitoring module 4, the temperature and humidity monitoring module 4 is used to collect the temperature and humidity signal 4 at the location in real time, the temperature and humidity monitoring module 4 is used to collect the particle concentration signal 4 at the location in real time, the multi-dimensional air pollutant monitoring module 4 is internally integrated with a CO sensor 4, a NO sensor 4, a CH4 sensor 4, a CO2 sensor 4 and a TVOC sensor 4, and is used to collect the CO concentration signal 4, the NO concentration signal 4, the CH4 concentration signal 4, the CO2 concentration signal 4 and the TVOC concentration signal 4 at the location in real time.

4. The individual supply protection system for ultra-clean fresh air for mining according to claim 3 is characterized in that: The high-precision composite filtering mechanism (1005) comprises a filter cartridge (1027), a filter element (1028) and a guide plate (1029); a plurality of mesh holes are provided on the body of the filter cartridge (1027) all over the surface; the filter element (1028) is inserted into the interior of the filter cartridge (1027); the filter element (1028) is a hollow cylindrical continuous pleated filter material, the pleated filter material has a three-layer structure, which comprises a coarse-effect filter layer, a medium-effect filter layer and a high-efficiency filter layer from the outside to the inside; at the same time, the continuous pleated filter material is formed by connecting a plurality of pleated units (1030) in sequence, and the cross section of each pleated unit (1030) is trapezoidal; the guide plate (1029) is located in the annular region between the filter cartridge (1027) and the filter element (1028), and is spirally wound around the outside of the filter element (1028).

5. The individual supply protection system for ultra-clean fresh air for mining according to claim 4 is characterized in that: The breathing mask (1021) comprises a mask body (1031), an inhalation valve (1032) and an exhalation valve (1033); the mask body (1031) has a breathing cavity inside, and its rear side is an open structure adapted to the face, and the surrounding of the open part is made of silicone material; an air outlet (1034) is provided at the lower front part of the mask body (1031), and an air inlet (1016) is provided at the upper front part of the mask body (1031); an air circuit connector is connected to the outer periphery of the front side of the air inlet (1016) of the mask body (1031); the air circuit connector is connected to the air outlet end of the individual air supply pipeline (1020) via a flexible pipeline; the inhalation valve (1032) is installed in the air inlet (1016); and the exhalation valve (1033) is installed in the air outlet (1034).

6. A mine-use ultra-clean fresh air individual supply protection system according to claim 5, characterized in that: The fresh air filter further comprises a pressure relief valve (1015), the inlet end of the pressure relief valve (1015) passes through the outer shell (1001) and is connected to the ultra-clean air flow chamber (1011), and the outlet end of the pressure relief valve (1015) is in communication with the outside atmosphere.

7. A mine-use ultra-clean fresh air individual supply protection system according to claim 6, characterized in that: The air inlet end of the air supply tube (6) is located on the upstream side of the flow direction of the fresh air flow (2) in the air supply tunnel (1).

8. A method for protecting individual supply of ultra-clean fresh air for use in a mine, using an individual supply of ultra-clean fresh air for use in a mine as claimed in claim 7, characterized in that: The following steps are involved: Step 1: Use a fresh air flow monitoring component 1 (9) to monitor the fresh air quality on the upstream side of the local ventilator (5), and send the collected temperature and humidity signal 1, particulate matter concentration signal 1, CO concentration signal 1, NO concentration signal 1, CH4 concentration signal 1, CO2 concentration signal 1 and TVOC concentration signal 1 to the controller. The controller obtains temperature and humidity data 1, particulate matter concentration data 1, CO concentration data 1, NO concentration data 1, CH4 concentration data 1, CO2 concentration data 1 and TVOC concentration data 1 according to the temperature and humidity signal 1, particulate matter concentration signal 1, CO concentration signal 1, NO concentration signal 1, CH4 concentration signal 1, CO2 concentration data 1 and TVOC concentration signal 1, and integrates the various monitoring data to obtain the fresh air cleanliness characterization value of the fresh air flow (2); The quality of compressed air in the underground compressed air pipeline (11) is monitored by using a second fresh air flow monitoring component, and the collected temperature and humidity signal 2, particulate matter concentration signal 2, CO concentration signal 2, NO concentration signal 2, CH4 concentration signal 2, CO2 concentration signal 2 and TVOC concentration signal 2 are sent to a controller. The controller obtains temperature and humidity data 2, particulate matter concentration data 2, CO concentration data 2, NO concentration data 2, CH4 concentration data 2, CO2 concentration data 2 and TVOC concentration data 2 according to the second temperature and humidity signal, the second particulate matter concentration signal, the second CO concentration signal, the second NO concentration signal, the second CH4 concentration signal, the second CO2 concentration data and the second TVOC concentration signal, and fuses the various monitoring data to obtain a compressed air cleanliness characterization value; The controller compares and analyzes the fresh air cleanliness characterization value and the compressed air cleanliness characterization value; when the fresh air cleanliness characterization value and the compressed air cleanliness characterization value are both lower than the set cleanliness threshold and cannot meet the use requirements, the controller sends an alarm signal to the remote terminal connected thereto; when the fresh air cleanliness characterization value is greater than the compressed air cleanliness characterization value, the controller controls the electric three-way valve to connect the fresh air device air inlet pipe (1025) and the air supply duct (6), and executes step 2; when the fresh air cleanliness characterization value is less than the compressed air cleanliness characterization value, the controller controls the electric three-way valve to connect the fresh air device air inlet pipe (1025) and the air duct supply duct (12), and executes step 3; when the fresh air cleanliness characterization value is equal to the compressed air cleanliness characterization value, the state of the electric three-way valve is kept unchanged; if the current electric three-way valve connects the fresh air device air inlet pipe (1025) and the air supply duct (6), then execute step 2; if the current electric three-way valve connects the fresh air device air inlet pipe (1025) and the air duct supply duct (12), then execute step 3; Step 2: The controller controls the local ventilator (5) to start working, and the microprocessor (1010) controls the air inlet control valve (1035) to open, and the local ventilator (5) is used to introduce the fresh air flow (2) in the air supply channel (1) into the air supply tube (6), and then supply it to the fresh air device air pump (1008); Step 3: The controller sends a start signal to the microprocessor (1010). After receiving the start signal, the microprocessor (1010) controls the air pump (1008) of the fresh air device to start working, and controls the flow regulating device (1014) in the individual clean air supply unit (1019) to open, and provides negative pressure to the filter housing (1017) through the air pump (1008) of the fresh air device, so as to introduce the fresh air flow (2) into the filter housing (1017), and sequentially uses the front metal screen (1003), the middle metal screen (1019) and the filter housing (1017) to filter the fresh air flow (2). 04) and a high-precision composite filtering mechanism (1005) perform triple progressive graded deep purification treatment on the fresh air flow (2), and then use the carbon monoxide absorption device (1006) to remove carbon monoxide in the fresh air flow (2) to obtain ultra-clean fresh air; through the action of the fresh air device air pump (1008), the ultra-clean fresh air enters the ultra-clean air flow chamber (1011), and enters the breathing mask (1021) through the one-way valve (1013) and the flow regulating device (1014) in the individual clean air supply unit (1019); At the same time, the ultra-clean airflow monitoring component 1 (1009) is used to monitor the ultra-clean fresh air quality on the downstream side of the fresh air device air pump (1008), and the collected temperature and humidity signal 3, particulate matter concentration signal 3, CO concentration signal 3, NO concentration signal 3, CH4 concentration signal 3, CO2 concentration signal 3 and TVOC concentration signal 3 are sent to the microprocessor (1010). The microprocessor (1010) obtains temperature and humidity data 2, particulate matter concentration data 2, CO concentration data 2, NO concentration data 2, CH4 concentration data 2, CO2 concentration data 2 and TVOC concentration data 2 according to the temperature and humidity signal 3, particulate matter concentration signal 3, CO concentration signal 3, NO concentration signal 3, CH4 concentration signal 3, CO2 concentration data 2 and TVOC concentration data 2, and integrates the various monitoring signals. The measured data obtains an air cleanliness characterization value 1 of the ultra-clean fresh air, and at the same time, compares the air cleanliness characterization value 1 with a set air purification quality threshold value. When the air cleanliness characterization value 1 is greater than or equal to the air purification quality threshold value, the microprocessor (1010) does not send an action signal. When the air cleanliness characterization value 1 is less than the air purification quality threshold value, the microprocessor (1010) controls the alarm module (1018) to perform an alarm action, and at the same time, controls the air inlet control valve (1035) to close, controls the fresh air device air pump (1008) to stop working, and controls the flow regulating device (1014) to close. At the same time, the microprocessor (1010) sends an alarm signal to the controller. After the controller receives the alarm signal from the microprocessor (1010), it sends an alarm signal to a remote terminal connected thereto; At the same time, the controller compares and analyzes the fresh air cleanliness characterization value and the compressed air cleanliness characterization value. When the fresh air cleanliness characterization value and the compressed air cleanliness characterization value are both lower than the set cleanliness threshold and cannot meet the use requirements, the controller sends an alarm signal to the remote terminal connected to it and sends an alarm signal to the microprocessor (1010). After receiving the alarm signal from the controller, the microprocessor (1010) controls the alarm module (1018) to perform an alarm action. At the same time, the air inlet control valve (1035) is controlled to close and the fresh air device air pump (1008) is controlled to stop. The controller controls the local ventilator (5) to start working and controls the electric three-way valve to connect the air inlet pipe (1025) of the fresh air device and the air supply pipe (6). When the fresh air cleanliness characterization value is less than the compressed air cleanliness characterization value, the controller controls the electric three-way valve to connect the air inlet pipe (1025) of the fresh air device and the air supply pipe (12). When the fresh air cleanliness characterization value is equal to the compressed air cleanliness characterization value, the controller does not operate.

9. A method for individual supply and protection of ultra-clean fresh air for mining according to claim 8, characterized in that: In step three, while the individual clean air supply unit (1019) is in operation, the flow rate of the flow regulating device (1014) is adjusted according to the individual user's own conditions, so as to obtain an air flow supply flow that meets the user's own needs.

Images