Intelligent dirty air recovery device for long-distance tunneling roadway

Abstract

The utility model discloses an intelligent dirty air recovery device for a long-distance tunneling roadway, which comprises positive-pressure air ducts and negative-pressure air ducts arranged in the roadway, the positive-pressure air ducts and the negative-pressure air ducts are arranged in sections, the two sections of the positive-pressure air ducts are communicated through a positive-pressure local fan, the negative-pressure air ducts are communicated through a negative-pressure local fan and a dust settling device, and the positive-pressure air ducts and the negative-pressure air ducts are communicated through a negative-pressure local fan. The negative-pressure local fans and the dust settling devices are alternately arranged, each section of negative-pressure air duct is obliquely arranged, and the side, close to the dust settling devices, of each section of negative-pressure air duct is low. Start and stop of the negative pressure local fan are monitored in real time and intelligently controlled through the multi-parameter gas sensor, the working environment quality is guaranteed, the energy-saving effect is achieved, meanwhile, dust settling devices are arranged between the multiple sections of negative pressure air cylinders, dust particles fall into the dust settling devices along with the gradient of the negative pressure air cylinders and airflow, and the dust settling devices are prevented from falling into the negative pressure air cylinders. Deposited particles are collected to a certain extent, and the possibility that the negative-pressure air duct is blocked is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mine ventilation, in particular to an intelligent recovery device for polluted air in a long-distance tunneling tunnel. Background Art

[0002] In mining activities, ventilation management of long-distance tunnels has always been a key link in engineering practice. Traditional ventilation methods, such as pressure-in, extraction or mixed, have their own advantages and disadvantages, but they have obvious limitations when dealing with long-distance ventilation needs. At the same time, although the method of recovering dirty air through negative pressure wind tubes can effectively remove dust, blasting smoke and exhaust gas emitted by trackless equipment generated by the working surface in theory, it faces a series of difficult technical challenges in actual operation. One of the most prominent problems is that the negative pressure wind tube is easily blocked by dust during the transportation of dirty air. In the mining environment, especially during the excavation operation, a large amount of dust and fine particles are permeated in the air. These substances are sucked into the wind tube under the action of negative pressure, and gradually deposited over time, eventually resulting in a reduction in the cross-section of the wind tube, an increase in wind resistance, and even complete blockage of the wind tube in severe cases, seriously affecting the ventilation effect. This phenomenon not only reduces the efficiency of the ventilation system and increases ventilation energy consumption, but also poses a potential threat to the health of underground workers, especially in environments with high dust concentrations, where the risk of occupational diseases is significantly increased.

[0003] Therefore, how to design an intelligent ventilation system that can effectively recover polluted air and avoid or significantly reduce the blockage of air ducts during long-distance excavation operations has become an important issue that needs to be urgently solved in the current mining engineering field. Utility Model Content

[0004] The purpose of the utility model is to provide an intelligent recovery device for polluted air in long-distance tunneling tunnels. Through real-time monitoring by a multi-parameter gas sensor, the start and stop of the negative pressure local fan can be intelligently controlled, which not only ensures the quality of the working environment, but also achieves energy-saving effects. At the same time, a dust settling device is arranged between multiple sections of negative pressure wind ducts, so that dust particles fall into the negative pressure wind ducts along the slope and airflow, and the deposited particles are collected to a certain extent, thereby reducing the possibility of the negative pressure wind duct being blocked, and solving the problems in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An intelligent device for recovering polluted air in a long-distance tunnel excavation lane, comprising a positive-pressure wind duct and a negative-pressure wind duct arranged in the lane, wherein the positive-pressure wind duct and the negative-pressure wind duct are arranged in sections, the two sections of the positive-pressure wind duct are connected by a positive-pressure local fan, and the negative-pressure wind ducts are connected by a negative-pressure local fan and a dust settling device, the negative-pressure local fans and the dust settling device are arranged alternately, and each section of the negative-pressure wind duct is arranged at an angle, and the side close to the dust settling device is lower.

[0007] Preferably, the dust settling device includes a containing box and a connecting tube, and connecting tubes are respectively provided on opposite sides of the containing box, one end of the connecting tube is connected to the containing box through a first flange, and the other end is connected to the negative pressure air cylinder through a second flange.

[0008] Preferably, a accommodating groove is provided inside the accommodating box, the connecting tube is connected to the accommodating groove, the bottom surface of the accommodating groove is an inclined surface, a box door is opened on one of the side walls of the accommodating box, the box door is located on the lower side of the inclined surface, and the bottom of the box door is flush with the bottom end of the inclined surface.

[0009] Preferably, the connecting tube is arranged obliquely and the end away from the accommodating box is higher, and the inclination angle of the connecting tube and the negative pressure air cylinder is the same.

[0010] Preferably, the accommodating box is of a structure that is narrow at the top and wide at the bottom, and one side of the box door is pivotally connected to the accommodating box.

[0011] Preferably, each of the negative pressure local fans is equipped with a multi-parameter gas sensor and a local fan start-stop controller. The local fan start-stop controller is located on one side of the negative pressure local fan, and the multi-parameter gas sensor is arranged in a lane close to the negative pressure local fan.

[0012] Preferably, the multi-parameter gas sensor and the local fan start-stop controller are connected to a mine intrinsically safe gas monitoring substation and a mine intrinsically safe PLC control cabinet via an optical cable.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model realizes real-time monitoring and intelligent control of the air quality in the tunnel by integrating a multi-parameter gas sensor and a mining intrinsically safe PLC control cabinet. When the monitored gas concentration exceeds the standard, the system can automatically start the corresponding negative pressure local fan to accelerate the recovery and purification of polluted air; and when the gas concentration reaches the standard during non-concentrated operation periods, the negative pressure local fan is automatically turned off to reduce unnecessary operation and avoid energy waste.

[0015] 2. In the utility model, when the polluted air circulates in the negative pressure wind duct, the heavier and larger dust particles in the air flow will gradually accumulate at the inner bottom of the negative pressure wind duct. Under the disturbance of the air flow, the deposited particles roll downward along the slope of the negative pressure wind duct and fall into the containing groove through the connecting tube. When the accumulation reaches a certain level, the staff can open the box door to make the deposited particles slide out of the containing box along the inclined surface, thereby emptying the inside of the containing box, effectively avoiding the reduction or blockage of the cross-section of the negative pressure wind duct, reducing the wind resistance of the polluted air transmission, and reducing the ventilation energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is an axonometric diagram of the dust settling device of the utility model;

[0018] Figure 3 This is a front cross-sectional view of the dust settling device of the utility model;

[0019] Figure 4 It is a side sectional view of the dust settling device of the utility model.

[0020] In the figure: 1. Positive pressure air duct; 2. Positive pressure local fan; 3. Negative pressure air duct; 4. Negative pressure local fan; 5. Multi-parameter gas sensor; 6. Local fan start and stop controller; 7. Mining intrinsically safe gas monitoring substation; 8. Mining intrinsically safe PLC control cabinet; 9. Tunnel; 10. Dust settling device; 11. Container; 12. Connecting tube; 13. Container groove; 14. First flange; 15. Second flange; 16. Box door; 17. Inclined surface. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In order to solve the problem that the existing technology cannot effectively recover the dirty air in the laneway, and the negative pressure air duct is prone to reduce the cross-section due to the deposition of dust particles, increase wind resistance, and reduce the transmission efficiency, the following technical solutions are given, please refer to Figure 1-4 ;

[0023] A device for intelligently recovering polluted air in a long-distance tunnel excavation tunnel comprises a positive-pressure wind tube 1 and a negative-pressure wind tube 3 arranged in a tunnel 9. Both the positive-pressure wind tube 1 and the negative-pressure wind tube 3 are arranged in sections. The two sections of the positive-pressure wind tube 1 are connected through a positive-pressure local fan 2. The positive-pressure local fan 2 is normally open by default. The negative-pressure wind tube 3 is connected through a negative-pressure local fan 4 and a dust settling device 10. The negative-pressure local fan 4 is used to recover the polluted air in the tunnel 9 in relay. The local fan start-stop controller 6 controls the start-stop state of the negative-pressure local fan 4 according to the monitoring data of a multi-parameter gas sensor 5. The negative-pressure local fan 4 and the dust settling device 10 are arranged alternately. Each section of the negative-pressure wind tube 3 is arranged obliquely and the side close to the dust settling device 10 is lower. The dust deposited in the negative-pressure wind tube 3 is collected and processed by the dust settling device 10.

[0024] The specifications of the positive pressure wind tube 1 are larger than those of the negative pressure wind tube 3, and the specifications of the positive pressure local fan 2 are larger than those of the negative pressure local fan 4; the specifications of the positive pressure local fan 2 and the negative pressure local fan 4 refer to wind pressure, air volume, power, air supply distance and diameter; the specifications of the positive pressure wind tube 1 and the negative pressure wind tube 3 refer to diameter, because the wind flow direction in the tunnel 9 can be guaranteed to be positive pressure wind tube 1 → working surface → tunnel 9 & negative pressure wind tube 3 → return air tunnel & ground surface, and the exhaust gas of trackless equipment in the tunnel 9 can be discharged with the negative pressure wind tube 3, and can also be discharged through natural diffusion. The monitoring parameters in the multi-parameter gas sensor 5 include but are not limited to CO, CO2, NO, NO2, NH3 and dust, which are preferably based on the actual situation of the mine site.

[0025] The dust settling device 10 includes a containing box 11 and a connecting tube 12. The connecting tubes 12 are respectively provided on opposite sides of the containing box 11. One end of the connecting tube 12 is communicated with the containing box 11 through a first flange 14, and the other end is communicated with the negative pressure air duct 3 through a second flange 15. A containing groove 13 is provided inside the containing box 11, and the connecting tube 12 is communicated with the containing groove 13; the connecting tube 12 is arranged in an inclined manner and the end away from the containing box 11 is higher. The connecting tube 12 and the negative pressure air duct 3 have the same inclination angle. The bottom surface of the containing groove 13 is an inclined surface 17. A box door 16 is provided on one of the side walls of the containing box 11. The box door 16 is located on the lower side of the inclined surface 17, and the bottom of the box door 16 is flush with the bottom end of the inclined surface 17. When the polluted air circulates in the negative pressure wind tube 3, the heavier and larger dust particles in the air flow will gradually accumulate at the inner bottom of the negative pressure wind tube 3. Under the disturbance of the air flow, the deposited particles roll downward along the slope of the negative pressure wind tube 3 and fall into the receiving groove 13 through the connecting tube 12. When the accumulation reaches a certain level, the staff can open the box door 16 to allow the deposited particles to slide out of the receiving box 11 along the inclined surface 17, thereby emptying the interior thereof.

[0026] The storage box 11 is narrow at the top and wide at the bottom, which can make the storage box 11 more stable and not easy to tip over, thereby achieving stable support for the negative pressure air duct 3. At the same time, it can also reduce the exposed area of ​​the top of the storage groove 13 and the airflow, reduce the degree of dust entrainment and interference of the airflow on the inside of the storage groove 13, and make it difficult for dust particles to be washed away; one side of the box door 16 is pivotally connected to the storage box 11.

[0027] Each negative pressure local fan 4 is equipped with a multi-parameter gas sensor 5 and a local fan start-stop controller 6. The local fan start-stop controller 6 is located on one side of the negative pressure local fan 4, and the multi-parameter gas sensor 5 is arranged in a tunnel 9 close to the negative pressure local fan 4. The multi-parameter gas sensor 5 and the local fan start-stop controller 6 are connected to the mine intrinsically safe gas monitoring substation 7 and the mine intrinsically safe PLC control cabinet 8 through an optical cable. The mine intrinsically safe gas monitoring substation 7 is used to receive the gas monitoring data of each multi-parameter gas sensor 5 and process and record it. The mine intrinsically safe PLC control cabinet 8 is used for equipment management connected to the mine intrinsically safe gas monitoring substation 7 underground to achieve data acquisition, analysis and signal discrimination.

[0028] Working principle: During long-distance excavation operations underground, the positive-pressure wind duct 1 and the positive-pressure local fan 2 in the tunnel 9 provide fresh airflow to the inside of the tunnel 9, and the multi-parameter gas sensor 5 obtains the gas concentration value and collects the collected gas concentration values ​​to the mine-used intrinsically safe gas monitoring substation 7. The mine-used intrinsically safe gas monitoring substation 7 summarizes the environmental parameter monitoring results of each work point and transmits them to the mine-used intrinsically safe PLC control cabinet 8. After data analysis, processing and judgment, the mine-used intrinsically safe PLC control cabinet 8 transmits an open or close signal to the local fan start-stop controller 6 closest to the multi-parameter gas sensor 5 to control the opening and closing state of the negative pressure local fan 4. The negative pressure local fan 4 is turned on until the dust concentration drops to a certain value and then turned off. Part of the dust carried by the airflow in the negative pressure wind duct 3 enters the containing box 11 and is deposited, so as to avoid excessive dust particles from filling the negative pressure wind duct 3 and reducing the cross-sectional area of ​​the wind.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. An intelligent device for recovering polluted air in a long-distance tunnel, comprising a positive-pressure air duct (1) and a negative-pressure air duct (3) arranged in a tunnel (9), characterized in that: The positive pressure air duct (1) and the negative pressure air duct (3) are both arranged in sections. The two sections of the positive pressure air duct (1) are connected via a positive pressure local fan (2), and the negative pressure air duct (3) is connected via a negative pressure local fan (4) and a dust settling device (10). The negative pressure local fans (4) and the dust settling device (10) are arranged alternately, and each section of the negative pressure air duct (3) is arranged in an inclined manner, and the side close to the dust settling device (10) is lower.

2. According to claim 1, a long-distance tunneling roadway polluted air intelligent recovery device is characterized in that: The dust settling device (10) comprises a containing box (11) and a connecting tube (12), wherein the connecting tubes (12) are respectively provided on opposite sides of the containing box (11), one end of the connecting tube (12) is connected to the containing box (11) via a first flange (14), and the other end of the connecting tube (12) is connected to the negative pressure air cylinder (3) via a second flange (15).

3. The intelligent recovery device for polluted air in long-distance tunnel excavation according to claim 2 is characterized in that: The containing box (11) is provided with a containing groove (13) inside, the connecting tube (12) is connected with the containing groove (13), the bottom surface of the containing groove (13) is an inclined surface (17), and a box door (16) is opened on one of the side walls of the containing box (11), the box door (16) is located on the lower side of the inclined surface (17), and the bottom of the box door (16) is flush with the bottom end of the inclined surface (17).

4. The intelligent recovery device for polluted air in long-distance tunneling according to claim 3 is characterized in that: The connecting tube (12) is arranged in an inclined manner and the end away from the containing box (11) is higher; the connecting tube (12) and the negative pressure air tube (3) have the same inclination angle.

5. The intelligent recovery device for polluted air in long-distance tunneling according to claim 4 is characterized in that: The accommodating box (11) is of a structure that is narrow at the top and wide at the bottom, and one side of the box door (16) is pivotally connected to the accommodating box (11).

6. The intelligent recovery device for polluted air in long-distance tunneling according to claim 5 is characterized in that: Each of the negative pressure local fans (4) is equipped with a multi-parameter gas sensor (5) and a local fan start-stop controller (6); the local fan start-stop controller (6) is located on one side of the negative pressure local fan (4); and the multi-parameter gas sensor (5) is located in a lane (9) close to the negative pressure local fan (4).

7. The intelligent recovery device for polluted air in long-distance tunneling according to claim 6 is characterized in that: The multi-parameter gas sensor (5) and the local fan start-stop controller (6) are connected to a mine-used intrinsically safe gas monitoring substation (7) and a mine-used intrinsically safe PLC control cabinet (8) via an optical cable.

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