Intelligent dispersion oxygen supplementing device for mine local low-oxygen area

Abstract

The utility model belongs to coal mine safety protection technical field, concretely is a kind of mine local low oxygen area intelligence dispersion oxygen supplement device, including oxygen concentration monitoring unit, intelligent control unit, oxygen source unit, gas dispersion unit and intrinsic safety shell. The oxygen sensor is used to monitor target area oxygen concentration in real time, and detection signal is transmitted to intelligent control unit, the control unit sets starting and alarm threshold value, when detection value is lower than set threshold value, control unit drive electromagnetic valve opens and starts vortex fan, oxygen is reduced after pressure reducing valve and enters venturi tube, and pre-mixes with outside air, again disperses to surrounding space by fan turbulence, realizes fast, even, safe oxygen supplement. Shell integrates sound-light alarm, for prompting operating personnel attention. The device compact structure, it is easy to move, can automatically start oxygen supplement in local low oxygen environment, avoid the operating risk caused by oxygen deficiency, improve downhole ventilation oxygen supplement efficiency, guarantee personnel safety.

Description

Technical Field

[0001] This utility model relates to the field of coal mine safety protection technology, specifically to an intelligent diffusion oxygen supplementation device for local low-oxygen areas in mines. Background Technology

[0002] In coal mining, the ventilation system is a crucial element in ensuring the safety of underground operations. However, due to the complex occurrence of coal seams, air leakage in goaf areas, uneven airflow distribution, and poor airflow organization in areas such as the corners of return airways, localized low-oxygen environments can easily form. Localized low oxygen can not only cause dizziness, fatigue, and slow reaction time among workers, but may even lead to asphyxiation accidents. It can also reduce the reliability of mechanical and electrical equipment and induce secondary disasters.

[0003] Existing technologies mainly rely on improving overall ventilation or configuring local fans to improve the air environment. However, this method is energy-intensive, has a wide coverage but lacks specificity, and has limited effectiveness in addressing localized low-oxygen problems deep in the working face or in ventilation blind spots. Some mines have tried using fixed oxygen supply devices or artificial oxygen supplementation, but these methods suffer from problems such as untimely start-up, uneven oxygen distribution, and the potential for localized oxygen enrichment, making it difficult to meet the dynamic safety requirements of actual underground operations.

[0004] Therefore, there is an urgent need for an intelligent oxygen supplementation device that can achieve real-time monitoring, automatic response, uniform dispersion, and meet the intrinsically safe explosion-proof requirements for mining, in order to solve the technical problems of lagging local hypoxia treatment, low efficiency, and safety hazards in the existing technology.

[0005] To address the above problems, this application proposes an intelligent diffusion oxygen supplementation device for localized low-oxygen areas in mines. Utility Model Content

[0006] The purpose of this invention is to provide an intelligent diffusion oxygen supplementation device for local low-oxygen areas in mines. This device can automatically start oxygen supplementation when the oxygen concentration is lower than a set threshold by real-time monitoring of the underground oxygen concentration. It adopts a synergistic design of venturi tube premixing and vortex fan turbulence diffusion to achieve a rapid, uniform and safe oxygen supplementation effect.

[0007] This device not only improves the safety of the underground working environment and reduces the health and life risks of coal miners caused by low oxygen, but also reduces the labor intensity of manual detection and artificial oxygen supply, solving the problems of delayed response to local low oxygen, low oxygen supplementation efficiency and the existence of oxygen-enrichment risks in the prior art.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0009] This utility model relates to an intelligent diffusion oxygen supplementation device for localized low-oxygen areas in mines, comprising an oxygen concentration monitoring unit, an intelligent control unit, an oxygen source unit, a gas diffusion unit, and an intrinsically safe housing. The oxygen concentration monitoring unit includes at least one intrinsically safe oxygen sensor for mining, arranged outside the device, to monitor the oxygen volume concentration in the target area in real time. The intelligent control unit includes a microcontroller control board, a device display screen, and a device operation panel, used for centralized integrated control of the device's operation. The oxygen source unit includes a small high-pressure oxygen cylinder, a high-pressure pressure reducing valve, and a normally closed solenoid valve, used for supplying oxygen for the normal operation of the device. The gas diffusion unit includes a Venturi tube-type mixing nozzle and a miniature explosion-proof vortex fan. The intrinsically safe housing is designed to be Ex ib 1 Mb level (intrinsically safe for coal mines), ensuring absolute safety in flammable and explosive environments.

[0010] Furthermore, the oxygen concentration monitoring unit is externally connected to a mining oxygen sensor to detect the oxygen concentration in the upper corner or in areas with low oxygen levels, and internally it is connected to the intelligent control unit via an optical fiber for data transmission. Furthermore, the input terminal of the microcontroller control board of the intelligent control unit is connected to the oxygen sensor to receive monitoring data from the oxygen sensor; Furthermore, the microcontroller control board of the intelligent control unit has built-in logic for preset oxygen concentration alarm thresholds and oxygen replenishment activation thresholds. When the oxygen concentration is detected to be lower than the activation threshold, the control unit issues a command; Furthermore, the output segment of the microcontroller control board of the intelligent control unit controls the start and stop of the solenoid valve and the micro fan; Furthermore, the small high-pressure oxygen cylinder of the oxygen source unit provides an oxygen source for the operation of the entire device, and its capacity can be selected as needed (e.g., 2L-4L) to provide high-pressure oxygen; Furthermore, the small high-pressure oxygen cylinder of the oxygen source unit outputs gas through a PTFE hose, and a high-pressure reducing valve is installed in the PTFE hose to reduce the high-pressure oxygen to a safe low-pressure state. Furthermore, a normally closed solenoid valve is installed at the connection point between the oxygen cylinder of the oxygen source unit and the venturi-type mixing nozzle, and its opening and closing is controlled by the control unit. The solenoid valve opens when energized, allowing oxygen to flow out; the solenoid valve closes when de-energized, stopping the flow of oxygen. Furthermore, the gas dispersion unit is the key component of this invention; Furthermore, the Venturi tube mixing nozzle (9) is provided with an air inlet (5), which is connected to the mixing chamber of the Venturi tube mixing nozzle (9). When the depressurized oxygen flows through the Venturi tube mixing nozzle (9) and is ejected at high speed, a negative pressure is formed in the mixing chamber. The surrounding air is drawn into the mixing chamber through the air inlet (5) and premixed with the oxygen before being output, thereby reducing the oxygen concentration at the outlet and avoiding local oxygen enrichment caused by direct injection. Furthermore, the miniature explosion-proof vortex fan of the gas dispersion unit is connected to the outlet of the Tubular mixing nozzle and is controlled by the control unit; Furthermore, the miniature explosion-proof vortex fan of the gas dispersion unit further agitates the premixed gas and pushes it to a greater distance, forming airflow disturbance, which promotes the rapid and uniform mixing and dispersion of oxygen and low-oxygen air, eliminating oxygen replenishment dead zones.

[0011] Furthermore, the intrinsically safe mining shell is made of impact-resistant and anti-static engineering plastics or lightweight alloy materials, and the overall design is Ex ib 1 Mb level to ensure absolute safety in flammable and explosive environments; Furthermore, the intrinsically safe mining casing has a handle or casters for easy movement and deployment; Furthermore, the intrinsically safe mining enclosure integrates an audible and visual alarm, which emits a flashing light and a buzzing sound when the oxygen concentration is low or when oxygen replenishment begins, to warn nearby personnel.

[0012] This utility model has the following beneficial effects: This invention achieves real-time monitoring and automatic response to low oxygen concentrations by deploying an intelligent diffusion oxygenation device in localized low-oxygen areas. The device utilizes a "pre-mixing + turbulent diffusion" design, ensuring that oxygen is fully mixed with air during release and evenly diffused through vortex airflow, effectively avoiding the risk of localized oxygen overload and ensuring a safe and reliable oxygenation process. Compared to traditional methods relying on overall ventilation or direct injection oxygenation, this device can directly target low-oxygen potential points, improving the accuracy and efficiency of the treatment.

[0013] This device features a compact structure and flexible mobility, enabling rapid deployment underground according to mining progress. Its automatic start / stop and audible / visual alarm functions reduce manual intervention, conserve energy and oxygen, and result in low operating costs and a long service life. In summary, this invention combines strong targeting, high intelligence, safety, reliability, and economic efficiency, providing a highly efficient and feasible solution for managing low-oxygen areas such as coal mine working faces and return air corners.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the intelligent diffusion oxygen supplementation device for localized low-oxygen areas in mines according to this utility model; Figure 2 This is a schematic diagram showing the installation location of the intelligent diffused oxygen supplementation device for localized low-oxygen areas in mines according to this utility model. Figure 3 This is a flowchart illustrating the principle of the intelligent diffusion oxygen supplementation device for localized low-oxygen areas in mines according to this utility model. The components represented by each number in the diagram are listed below: In the diagram: 1. Device housing; 2. Sensor signal transmission line; 3. Device operation panel; 4. Device microcontroller control board and device display screen; 5. Air inlet; 6. High-pressure oxygen cylinder; 7. PTFE hose; 8. High-pressure pressure reducing valve; 9. Venturi tube mixing nozzle; 10. Normally closed solenoid valve; 11. Miniature explosion-proof vortex fan; 12. Audible and visual alarm; 13. Oxygen sensor. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] This utility model is an intelligent diffusion oxygen supplementation device for local low oxygen areas in mines, including an oxygen concentration monitoring unit, an intelligent control unit, an oxygen source unit, a gas diffusion unit, and an intrinsically safe housing for the device; The oxygen concentration monitoring unit includes at least one intrinsically safe oxygen sensor 13 for mining, which is arranged outside the device to monitor the oxygen volume concentration in the target area in real time. The intelligent control unit includes a single-chip microcomputer control board 4, a device display screen 4, and a device operation panel 3, which are used for centralized integrated control of the device operation. The oxygen source unit includes a small high-pressure oxygen cylinder 6, a PTFE hose 7, a high-pressure pressure reducing valve 8, and a normally closed solenoid valve 10, which are used to supply oxygen for normal operation of the device. The gas dispersion unit includes a Venturi tube mixing nozzle 9 and a miniature explosion-proof vortex fan 11. The intrinsically safe housing 1 is designed to be of the Ex ib I Mb level (intrinsically safe for coal mines), ensuring absolute safety in flammable and explosive environments.

[0019] The oxygen concentration monitoring unit is externally connected to an intrinsically safe oxygen sensor 13 for mining, which is used to detect the oxygen concentration in the upper corner or in the low oxygen area. Internally, it transmits data with the intelligent control unit through the signal transmission line 2. The microcontroller control board 4 of the intelligent control unit is connected to the oxygen sensor to receive monitoring data from the oxygen sensor 2. The microcontroller control board 4 of the intelligent control unit has built-in logic for preset oxygen concentration alarm thresholds and oxygen replenishment activation thresholds. When the oxygen concentration is detected to be lower than the activation threshold, the control unit issues a command. The microcontroller control board of the intelligent control unit controls the start and stop of the solenoid valve 8 and the micro fan 11. Among them, the small high-pressure oxygen cylinder 6 of the oxygen source unit provides oxygen for the operation of the whole device, and its capacity can be selected as needed (such as 2L-4L) to provide high-pressure oxygen. The small high-pressure oxygen cylinder of the oxygen source unit outputs gas through a PTFE hose 7. A high-pressure reducing valve 8 is installed in the PTFE hose to reduce the high-pressure oxygen to a safe low-pressure state. In this unit, a normally closed solenoid valve 10 is installed at the connection point between the oxygen cylinder 6 of the oxygen source unit and the venturi-type mixing nozzle 9. The solenoid valve 10 is controlled by a control unit to open and close. When energized, the solenoid valve 10 opens, allowing oxygen to flow out; when de-energized, the solenoid valve 10 closes, stopping the flow of oxygen. The gas dispersion unit is the key component of this invention. The Venturi tube mixing nozzle 9 of the gas diffusion unit utilizes the negative pressure generated in the chamber when the depressurized oxygen flow is ejected at high speed to automatically draw in the air around the device. The air enters through the air inlet 5 reserved in the device, so that the high-purity oxygen is pre-mixed with the air before being ejected, reducing the outlet oxygen concentration and avoiding local oxygen enrichment caused by direct injection. The miniature explosion-proof vortex fan 11 of the gas dispersion unit is connected to the outlet of the Tubular mixing nozzle 9 and is controlled by the control unit. The miniature explosion-proof vortex fan 11 of the gas dispersion unit further agitates the premixed gas and pushes it to a greater distance, forming airflow disturbance, which promotes the rapid and uniform mixing and dispersion of oxygen and low-oxygen air, eliminating oxygen replenishment dead zones.

[0020] The metal protective mesh cover is mainly used to protect the internal structure and prevent foreign objects from entering. The intrinsically safe mining shell 1 is made of impact-resistant and anti-static engineering plastics or lightweight alloy materials, and the overall design is Ex ib 1 Mb level to ensure absolute safety in flammable and explosive environments. The intrinsically safe mining enclosure integrates an audible and visual alarm 12, which emits a flashing light and a buzzing sound to warn nearby personnel when the oxygen concentration is low or when oxygen replenishment begins.

[0021] Understandably, this utility model can replace manual methods for inspecting and supplementing oxygen in localized low-oxygen areas during coal mining operations. It can intelligently monitor and diffuse oxygen supplementation at low-oxygen potential points in a timely manner. While improving ventilation and oxygen supplementation efficiency, it effectively avoids operational risks caused by insufficient oxygen, ensuring the safety of underground workers, thereby achieving a balance between safe production and efficient operation.

[0022] One specific application of this embodiment is as follows: During coal mining operations, the intelligent diffusion oxygen supplementation device of this utility model is placed in areas prone to low oxygen levels, such as the return air corner or ventilation blind spot of the working face. Its working principle is as follows: First, an oxygen sensor located outside the device or extending to the corner continuously monitors the oxygen concentration in the surrounding air and transmits the signal to the intelligent control unit in real time. When the oxygen concentration is lower than a set threshold (e.g., 19.0%), the control unit immediately issues a command to activate the audible and visual alarm and simultaneously open the solenoid valve. Second, the high-pressure oxygen in the oxygen source unit is depressurized by a pressure reducing valve and enters the Venturi tube mixing nozzle. The negative pressure created by the high-speed airflow draws in surrounding air, achieving premixing of oxygen and air. Simultaneously, the control unit activates a miniature explosion-proof vortex fan to agitate and propel the premixed gas, causing the mixed gas to quickly diffuse into the low-oxygen area, ensuring a safe and uniform oxygen supplementation process. Furthermore, when the oxygen concentration gradually recovers and reaches the set safety value (e.g., 20.0%), the sensor detection signal is fed back to the control unit, which then shuts off the solenoid valve and fan, stops the audible and visual alarm, and the device automatically enters standby monitoring mode.

[0023] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A smart diffusion oxygen supplementation device for localized low-oxygen areas in mines, comprising an oxygen concentration monitoring unit, an intelligent control unit, an oxygen source unit, a gas diffusion unit, and an intrinsically safe housing, characterized in that: The oxygen concentration monitoring unit includes an intrinsically safe oxygen sensor (13) for mining, which is used to monitor the local oxygen volume concentration in real time and transmit the monitoring signal to the intelligent control unit. The intelligent control unit includes a device operation panel (3) and a single-chip microcomputer control board integrated device display screen (4). Its input end is electrically connected to the oxygen sensor (13), and its output end is electrically connected to the solenoid valve (10), the miniature explosion-proof vortex fan (11), and the sound and light alarm (12), respectively. It can perform start and stop control according to the oxygen concentration threshold. The oxygen source unit includes a small high-pressure oxygen cylinder (6), a PTFE hose (7), a high-pressure reducing valve (8) and a normally closed solenoid valve (10). The high-pressure oxygen cylinder reduces the oxygen pressure to a safe low pressure through the high-pressure reducing valve (8) and controls the output to the gas diffusion unit through the normally closed solenoid valve (10). The gas dispersion unit includes a Venturi tube mixing nozzle (9) and a miniature explosion-proof vortex fan (11). The Venturi tube mixing nozzle (9) uses the negative pressure formed by the high-speed oxygen flow to draw in the surrounding air, so that the oxygen and air are premixed and then dispersed evenly by the fan. The intrinsically safe housing (1) is made of impact-resistant and anti-static materials and integrates an audible and visual alarm (12).

2. The intelligent diffused oxygen supplementation device for localized low-oxygen areas in mines according to claim 1, characterized in that: The oxygen sensor (13) is electrically connected to the intelligent control unit via a signal transmission line, and the oxygen sensor (13) is installed at key monitoring locations where hypoxia may occur.

3. The intelligent diffused oxygen supplementation device for localized low-oxygen areas in mines according to claim 1, characterized in that: The intelligent control unit has built-in oxygen concentration alarm threshold and start threshold. When the oxygen concentration is below the start threshold, it will automatically replenish oxygen and when it is above the safe value, it will automatically shut down.

4. The intelligent diffused oxygen supplementation device for localized low-oxygen areas in mines according to claim 1, characterized in that: The normally closed solenoid valve (10) has a normally closed structure and automatically closes when power is lost, ensuring safe isolation of the oxygen source under abnormal conditions.

5. The intelligent diffused oxygen supplementation device for localized low-oxygen areas in mines according to claim 1, characterized in that: The Venturi tube type mixing nozzle (9) is provided with an air inlet (5), which is connected to the mixing chamber of the Venturi tube type mixing nozzle (9). It is used to draw in surrounding air when oxygen injection forms negative pressure, and to premix the drawn-in air with oxygen in the mixing chamber to reduce the risk of direct injection of oxygen-enriched air.

6. The intelligent diffused oxygen supplementation device for localized low-oxygen areas in mines according to claim 1, characterized in that: The miniature explosion-proof vortex fan (11) is installed at the nozzle position to disturb and diffuse the premixed gas, thereby improving the oxygen uniformity in the local space.

7. The intelligent diffused oxygen supplementation device for localized low-oxygen areas in mines according to claim 1, characterized in that: The audible and visual alarm (12) issues a warning signal when the oxygen concentration is below the threshold or when the oxygen supplementation device is running.

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