Coal mine underground gas dust comprehensive control device

Abstract

The invention relates to the technical field of gas dust comprehensive prevention and control, in particular to a coal mine underground gas dust comprehensive prevention and control device. The air supply sleeve is arranged in the working roadway and communicated with the tail end of the air inducing pipe, and a plurality of air supply outlets are formed in the wall of the air supply sleeve; the water spraying sleeve is arranged in the working roadway and communicates with the air supply sleeve, and a plurality of water spraying channels are formed in the wall of the water spraying sleeve so as to spray water mist to the working roadway; the water conveying pipe is connected with the water spraying sleeve and used for supplying water to the water spraying sleeve. The rotating shaft is arranged in the air supply sleeve, the water spray sleeve and the water conveying pipe, and is provided with a plurality of power blades and spiral water supply blades; fresh air impacts the power blades so as to drive the rotating shaft and the spiral water conveying blades on the rotating shaft to rotate, and therefore water flow in the water conveying pipe is guided into the water spraying sleeve. The device is matched with an existing negative pressure ventilation system, ventilation and dust falling are conducted at the same time, and the accumulation risk of harmful gas and dust is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of comprehensive gas and dust prevention and control, and in particular to a comprehensive gas and dust prevention and control device in an underground coal mine. Background Art

[0002] In the process of coal mining, gas and dust are two core safety hazards that always pose a major threat to the safe operation of the mine and the life safety of miners. Gas is a flammable and explosive gas composed of methane. When gas accumulates to a certain concentration in the mine, once it encounters a fire source or electric spark, it may trigger a devastating explosion accident, which will not only cause huge casualties and property losses, but may also trigger a chain reaction, leading to the collapse of the safety system of the entire mine. Gas mainly comes from the gas released from coal seams, tunnels and other structures in the mine. As coal mining deepens, these gases continue to seep out, exacerbating the risk of gas accumulation.

[0003] At the same time, dust is also a potential safety hazard in coal mines that cannot be ignored. During the mining, transportation and crushing of coal, a large amount of tiny dust particles are released into the air. These particles are not only easy to spread, but also have a serious impact on the health of miners if inhaled for a long time. The high concentration of coal dust in the air may not only cause coal dust explosions, but also cause miners to suffer from occupational diseases such as pneumoconiosis, which is particularly harmful to the respiratory system. When coal dust and gas exist at the same time and the concentrations are high, the risk of explosion increases exponentially. The shock wave generated by the gas explosion can instantly lift the coal dust, forming a large-scale suspended dust cloud, which provides sufficient fuel for subsequent coal dust explosions, thereby further exacerbating the destructiveness and danger of the explosion.

[0004] In order to cope with the threat of gas and dust, the coal mining industry has long been exploring effective prevention and control measures. Among them, the underground ventilation system, as a key prevention and control means, plays a vital role. As an important form of underground ventilation, the negative pressure ventilation system reduces the air pressure in the mine and promotes fresh air from the outside to enter the mine to achieve the purpose of ventilation. The system uses the powerful suction of the fan to create a negative pressure environment lower than the external atmospheric pressure in certain areas of the mine, thereby forcing air from the atmosphere to flow into the mine for circulation. Fresh air flows in from the entrance of the mine, passes through various working areas, and discharges gas, dust and other harmful gases out of the mine, effectively reducing the concentration of harmful gases in the mine.

[0005] However, the negative pressure ventilation system is not a panacea in practical applications. It relies on differences in atmospheric pressure to drive air flow, and is therefore affected by many factors such as the length, curvature, and resistance of the underground tunnel. In the case of an underground tunnel that is too long, has many bends, or has high resistance, the air flow may become uneven, resulting in unsatisfactory ventilation in some areas. Especially in deeper mines, ventilation efficiency tends to be significantly reduced due to long wind paths and limited pressure differences. In addition, in some mining working faces or complex areas, the negative pressure ventilation system may not be able to cover every corner, resulting in local ventilation dead corners, which provides an opportunity for the accumulation of harmful gases such as gas and dust, thereby increasing safety risks. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a comprehensive gas and dust prevention and control device for underground coal mines, which cooperates with the existing negative pressure ventilation system to reduce the risk of accumulation of harmful gases and dust.

[0007] To achieve the above object, the present invention provides the following technical solution: a comprehensive gas and dust prevention and control device for underground coal mines, comprising:

[0008] The induced air duct is arranged along the air intake lane and extends to the working lane to introduce fresh air;

[0009] An air supply sleeve is arranged in the working lane and connected to the end of the air duct, and is provided with a plurality of air supply ports to inject fresh air into the working lane;

[0010] The water spray sleeve is arranged in the working lane and connected to the air supply sleeve, and is provided with a plurality of water spray channels to spray water mist to the working lane.

[0011] Optionally, a plurality of air supply ports are arranged in a circular array at an end of the air supply sleeve away from the air duct.

[0012] Optionally, the air supply sleeve has a trumpet-shaped air supply cavity inside, and the radial dimension of the air supply cavity gradually increases along the air flow direction.

[0013] Optionally, a plurality of water spray channels are opened on the water spray sleeve in a circular array.

[0014] Optionally, the cross-section of the water spray channel along the radial direction of the water spray sleeve is a dumbbell-shaped water spray channel with tapered ends.

[0015] Optionally, the water spray channel includes an introduction section, a compression section and a release section which are connected to each other; the introduction section and the release section are both conical holes, the compression section is a cylindrical hole, and the small opening ends of the introduction section and the release section are respectively connected to the two ends of the compression section.

[0016] Optionally, the water spray sleeve has a transition cavity inside, and the transition cavity has a curved surface protruding toward the side wall of the water spray sleeve.

[0017] Optionally, a water storage box is also included, wherein a water pipe is installed on the side of the water storage box close to the water spray sleeve, and the water pipe is connected to the water spray sleeve to provide water to the water spray sleeve; a water inlet pipe is installed on the side of the water storage box away from the water spray sleeve.

[0018] Optionally, a rotating shaft is arranged in the air supply sleeve and extends to the water spray sleeve and the water pipe; a plurality of power blades are arranged on the shaft section of the rotating shaft located in the air supply sleeve, and a spiral water supply blade is arranged on the shaft section of the rotating shaft located in the water pipe; when fresh air is input into the air supply sleeve, the wind flow impacts the power blades, thereby driving the rotating shaft and the spiral water supply blades thereon to rotate, thereby introducing the water flow in the water pipe into the water spray sleeve.

[0019] Optionally, a plurality of power blades are arranged on an axial section of the rotating shaft located between the air supply port and an interface between the air supply sleeve and the air induced duct.

[0020] Optionally, a shaft section of the rotating shaft located at the water spray sleeve is sleeved with a rotating disk, and a plurality of arc-shaped guide blades are arranged on the rotating disk.

[0021] The coal mine underground gas and dust comprehensive prevention and control device provided by the present invention is used in conjunction with the existing negative pressure ventilation system. The compressed air fan is arranged outside the well and is connected to the induced draft duct, through which fresh air is introduced into the well.

[0022] The beneficial effects of the present invention are:

[0023] The comprehensive coal mine gas and dust prevention and control device of the present invention realizes comprehensive optimization of the coal mine underground environment by setting an air supply part and a water spray part, and utilizing an externally arranged compressed air fan, thereby significantly improving the safety and operation efficiency of the mine. The beneficial effects are specifically embodied in the following aspects:

[0024] First of all, the air supply unit has greatly improved the ventilation conditions in the mine. Although the traditional negative pressure ventilation system can achieve air circulation to a certain extent, it is often limited by the complex tunnel structure and resistance distribution underground, resulting in uneven ventilation effects, especially in key areas such as working tunnels. The present invention uses air supply chambers and air supply ports to introduce external fresh air into the mine in an efficient and uniform manner, effectively solving the problem of insufficient local ventilation. This improvement not only ensures the freshness of the air inside the mine, but also greatly reduces the risk of accumulation of harmful gases and dust, providing miners with a safer and healthier working environment.

[0025] Secondly, the water spraying part further enhances the dust reduction capability of the device. Dust generated during coal mining operations is an important factor in causing fires, explosions and occupational diseases of miners. The present invention continuously sprays fine water mist through the water spraying part. These water mist particles can quickly capture and settle dust in the air, effectively shorten the dust suspension time, and significantly reduce the dust concentration. At the same time, the evaporation of water mist can also take away some heat and play a cooling role, thereby improving the underground working environment and improving the work efficiency and comfort of miners. This dual mechanism combining ventilation and dust reduction provides a strong guarantee for safe production in coal mines.

[0026] In addition, placing the air compressor outside the well not only avoids the use of underground electrical equipment, fundamentally reducing the risk of fire caused by electric sparks, but also efficiently introduces fresh air into the working area through the negative pressure effect, forming a safe working environment. In traditional systems, the use of underground electrical equipment often becomes a source of potential safety hazards, especially in humid and flammable mine environments, where equipment failure may cause serious safety accidents. The present invention places the compressed air blower externally, which not only reduces the possibility of equipment failure, but also reduces the dependence on the underground power system, thereby improving the safety and reliability of the entire device.

[0027] In summary, the coal mine underground gas and dust comprehensive prevention and control device of the present invention realizes the perfect combination of ventilation, dust reduction and safety protection through the synergistic effect of the air supply part, the water spray part and the external fan. This innovative solution not only significantly improves the ventilation efficiency and dust reduction effect of the mine, but also effectively reduces the safety risks in the coal mining process.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 It is a schematic diagram of the overall structure of the comprehensive gas and dust prevention and control device for underground coal mines of the present invention;

[0031] Figure 2 It is an exploded view of the air supply part, water spray part, rotating assembly and pressurizing assembly of the comprehensive gas and dust prevention and control device for underground coal mines of the present invention;

[0032] Figure 3It is a schematic diagram of the internal structure of the air supply unit of the comprehensive gas and dust prevention and control device for underground coal mines of the present invention;

[0033] Figure 4 It is a cross-sectional view of the water spraying part of the comprehensive gas and dust prevention and control device for underground coal mines of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the water storage part of the comprehensive gas and dust prevention and control device for underground coal mines of the present invention;

[0035] Figure 6 It is a structural schematic diagram of a rotating assembly of a comprehensive gas and dust prevention and control device for underground coal mines of the present invention;

[0036] Figure 7 It is a structural schematic diagram of a pressurizing assembly of a comprehensive gas and dust prevention and control device for underground coal mines of the present invention;

[0037] Figure 8 It is a schematic diagram of the flow direction of water and air in the comprehensive gas and dust prevention device for underground coal mines of the present invention;

[0038] Fig. 9 The present invention is a schematic diagram of the arrangement of the comprehensive gas and dust prevention and control device for underground coal mines in the air intake lane, working lane and air outlet lane.

[0039] Reference numerals:

[0040] 1-air induction section; 11-air induction pipe; 2-air supply section; 21-air supply sleeve; 22-air supply chamber; 23-air supply port; 3-water spray section; 31-water spray sleeve; 32-water spray channel; 321-introduction section; 322-compression section; 323-release section; 33-transition chamber; 4-water storage section; 41-water storage box; 42-water inlet pipe; 43-water outlet pipe; 44-water delivery pipe; 5-rotating assembly; 51-rotating shaft; 52-power blade; 53-spiral water supply blade; 6-pressurizing assembly; 61-rotating disk; 62-guide blade; 7-air inlet lane; 8-working lane; 9-air outlet lane. DETAILED DESCRIPTION

[0041] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0042] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0043] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] like Figure 1-9 As shown, the present invention provides a comprehensive gas and dust prevention device for underground coal mines, which can cooperate with the existing negative pressure ventilation system to further ensure the air circulation underground and reduce the accumulation of gas and dust during underground coal mine operations. The device is mainly composed of an air induction part 1, an air supply part 2, a water spray part 3, a water storage part 4, a rotating component 5 and a pressurizing component 6. Through the synergistic effect of multiple functional components, the air quality underground is effectively improved to ensure the safety of miners.

[0045] like Figure 1 , Fig. 9 As shown, along the wind flow direction, there are the induced draft section 1, the air supply section 2, the water spray section 3 and the water storage section 4. The induced draft section 1 is an L-shaped induced draft duct 11, which is arranged in the air inlet tunnel 7 and bends toward the working tunnel 8. The compressed air blower is arranged outside the mine, which is connected to the induced draft duct to introduce fresh air into various working areas of the mine. The L-shaped design helps to better distribute the air flow and has the function of optimizing the ventilation path. The air supply section 2 is connected to one end of the induced draft section 1 located in the working tunnel 8 and is connected to the induced draft section 1, so as to continuously send the fresh air in the induced draft section 1 into the working tunnel 8 of the mine, which not only helps to dilute the gas concentration underground and reduce the risk of gas explosion, but also helps to discharge harmful gases and improve the air environment underground.

[0046] Specifically, if Figure 3As shown, the air supply part 2 is an air supply sleeve 21, and the air supply sleeve 21 is installed on the side of the air induction part 1. The interior of the air supply sleeve 21 is constructed to have an air supply cavity 22 for guiding the air flow. Along the wind flow direction, the air supply cavity 22 is in a trumpet shape with a gradually expanding radial size to increase the area and intensity of the air flowing in the air supply sleeve 21, thereby enhancing the wind pressure. A plurality of air supply ports 23 are provided on the cylinder wall of the air supply sleeve 21, and the plurality of air supply ports 23 are arranged in a circular array at the end of the air supply sleeve 21 away from the air induction part 1 to deliver the air in the air supply sleeve 21 into the working lane 8. The air supply ports 23 in the circular array make the air supply more uniform and smooth, which can not only quickly reduce the gas concentration in the lane, but also effectively improve the air quality, and at the same time enhance the stability of the air flow and improve the overall efficiency of the ventilation system.

[0047] Furthermore, since a large amount of dust is generated during coal mining, the accumulation of dust will not only cause health problems, but may also cause dust explosions. Therefore, along the wind direction, a water spraying section 3 and a water storage section 4 are provided behind the air supply section 2. The water storage section 4 serves as a water supply source for the water spraying system to ensure that the water spraying section 3 can achieve long-term dust reduction operations. The water spraying section 3 and the water storage section 4 cooperate to spray water and atomize the dust suspended in the working lane 8, reduce the concentration of dust in the air, and prevent dust from spreading. Water spraying can also reduce the temperature underground to a certain extent, increase the air humidity, and further suppress the generation of dust.

[0048] Specifically, if Figure 4 As shown, the main structure of the water spray part 3 is designed as a water spray sleeve 31, which is installed at the end of the air supply sleeve 21 and connected thereto, so as to spray and reduce dust while supplying air. A plurality of water spray channels 32 are provided on the wall of the water spray sleeve 31 in a circular array. The water spray channels 32 are of a special-shaped structure, and include an introduction section 321, a compression section 322 and a release section 333 from the inside to the outside along the radial direction of the water spray sleeve 31. Both the introduction section 321 and the release section 33 are conical holes, and the compression section 322 is a cylindrical hole. The small opening ends of the introduction section 321 and the release section 33 are connected to the compression section 322, and the two are symmetrically distributed with the compression section 322 as the center. The conical introduction section 321 can effectively pressurize the water flow, and the water is squeezed and atomized when passing through the compression section 322 to form a more uniform water mist, and then sprayed to the outside through the release section 333. The water mist particles are small and can be suspended in the air and fully capture the dust particles underground, achieving a good dust reduction effect.

[0049] Furthermore, the interior of the water spray sleeve 31 has a transition chamber 33, and the transition chamber 33 has a curved surface protruding toward the side wall of the water spray sleeve 31. When the water flow enters the transition chamber 33, the water flow is accelerated in the transition chamber 33, so that the water flow obtains higher kinetic energy before spraying, thereby enhancing its atomization effect. Through the optimized design of the water spray channel 32 and the transition chamber 33, the water flow can form a more dense and uniform water mist when spraying, thereby improving the capture efficiency of dust particles, enhancing the dust reduction effect, and ensuring the continuous improvement of the air quality in the mine.

[0050] like Figure 5 As shown, the water storage part 4 is composed of four main parts: a water storage box 41, a water inlet pipe 42, a water outlet pipe 43 and a water delivery pipe 44. The water inlet pipe 42 is arranged on the side of the water storage box 41 away from the water spraying part 3, and is used to replenish water to the water storage box 41 to ensure that there is always sufficient water supply during the operation, and to avoid the dust reduction effect caused by lack of water. The water delivery pipe 44 is installed on the side of the water storage box 41 close to the water spraying part 3, and is connected to the water spraying sleeve 31 to effectively transport the water in the water storage box 41 to the water spraying part 3, ensuring that the water spraying part 3 can obtain the required water source during operation, thereby realizing continuous dust reduction operation. The water outlet pipe 43 is located at the bottom of the water storage box 41, which is convenient for discharging excess water in other cases and maintaining the water level stability of the water storage box 41. Through reasonable water storage design, the water storage part 4 can automatically adjust the water supply to avoid equipment shutdown caused by frequent water replenishment.

[0051] like Figure 2 , Figure 3 , Figure 4 As shown, the rotating assembly 5 and the pressurizing assembly 5 are both installed inside the air supply part 2 and the water spray part 3. The rotating assembly 5 is installed inside the air supply part 2, and the flow cavity inside the air supply part 2 drives the rotating assembly 5 to rotate, so that the water flow is released more evenly from the water spray part 3. The rotating assembly 5 does not require an additional power source and is only driven by wind flow, which has the advantages of energy saving and high efficiency. Furthermore, the pressurizing assembly 6 is installed on the rotating assembly 5 to increase the kinetic energy of the sprayed water flow. The water flow is pressurized and atomized into tiny water droplets through the pressurizing assembly 6, so that it can better adhere to the dust particles in the air to form a water-dust combination, and finally make the dust sink to achieve a more effective dust reduction effect. The design of the pressurizing assembly 6 improves the dust reduction efficiency of the water spray part 3, so that the system can still maintain good working performance in harsh environments.

[0052] like Figure 6 , Figure 8As shown, the rotating assembly 5 includes a rotating shaft 51 disposed in the air supply sleeve 21, the water spray sleeve 31 and the water delivery pipe 44, and the rotating shaft 51 is configured to extend along the axes of the three and rotate around the axes of the three. A plurality of power blades 52 are installed on the shaft section of the rotating shaft 51 located in the air supply sleeve 21, and the power blades 52 are arranged in front of the air supply port 23. The power blades 52 rotate rapidly with the help of the wind flow in the air supply sleeve 21, providing reliable power support for subsequent water spraying operations. Furthermore, a spiral water supply blade 53 is installed on the shaft section of the rotating shaft 51 located in the water delivery pipe 44, so as to efficiently introduce the water in the water delivery pipe 44 into the water spray sleeve 31. A pressurizing assembly 6 is provided on the shaft section of the rotating shaft 51 located in the water spray sleeve 31, as shown in FIG. Figure 7 As shown, the pressurizing assembly 6 includes a rotating disk 61 and guide vanes 62. The rotating disk 61 is sleeved on the rotating assembly 5, and the guide vanes 62 are evenly arranged on the rotating disk 61 in a circular array to ensure that the water flow can be evenly dispersed along the guide vanes 62.

[0053] In some optional embodiments, the shape of the guide blade 62 is designed to be arc-shaped, and the height of the guide blade 62 gradually increases from the center to the edge of the rotating disk 61, so that the water flow is effectively accelerated when passing through the guide blade 62, thereby enhancing the atomization effect of the spraying of the water spray part 3 and more effectively performing dust reduction treatment.

[0054] The invention provides a comprehensive gas and dust prevention device for underground coal mines, which is suitable for underground work in negative pressure ventilation systems, such as Fig. 9 As shown, the air inlet lane 7, the working lane 8 and the return air lane 9 are in a U-shaped structure, the air inlet section 1 is arranged along the air inlet lane 7, and the air supply section 2, the water spray section 3 and the water storage section 4 are arranged in the working lane 8. The external compressed air fan inputs air into the air inlet section 1. When the gas passes through the air supply sleeve 21, after being pressurized by the air supply chamber 22, it drives the power blades 52 to rotate and is discharged from the air supply port 23, thereby injecting fresh air into the working lane 8, ensuring the breathing needs of the workers working therein, while helping the negative pressure ventilation system to increase the pressure of the working lane 8, thereby making the entire negative pressure ventilation system more stable. The rotating shaft 51 rotates under the drive of the power blades 52, thereby driving the spiral water supply blades 53 to rotate, transporting the water in the water storage box 41 to the side of the pressurizing component 6, increasing the water flow speed under the action of the guide blades 62, and spraying it in the working lane 8 after being atomized in the water spray channel 32, thereby playing a role in dust reduction;

[0055] The invention provides a comprehensive coal mine gas and dust prevention and control device that cooperates with the existing negative pressure ventilation system. On the one hand, it avoids the potential hazards of electric spark explosion of electrical devices. On the other hand, it increases the air pressure in the working lane 8, ensures the operating stability of the negative pressure ventilation system, and solves the problem of dust diffusion.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A comprehensive gas and dust prevention and control device for underground coal mines, characterized in that: include: An air duct (11) is arranged along the air inlet lane (7) and extends to the working lane (8) for introducing fresh air; An air supply sleeve (21) is arranged in the working lane (8) and connected to the end of the air duct (11), and is provided with a plurality of air supply ports (23) for injecting fresh air into the working lane (8); A water spray sleeve (31) is arranged in the working lane (8) and connected to the air supply sleeve (21), and is provided with a plurality of water spray channels (32) for spraying water mist onto the working lane (8).

2. The comprehensive gas and dust prevention and control device for underground coal mines according to claim 1 is characterized in that: The plurality of air supply ports (23) are arranged in a circular array at an end of the air supply sleeve (21) away from the air induction pipe (11).

3. The comprehensive gas and dust prevention and control device for underground coal mines according to claim 1 is characterized in that: The air supply sleeve (21) has a trumpet-shaped air supply cavity (22) inside, and the radial dimension of the air supply cavity (22) gradually increases along the air flow direction.

4. The comprehensive gas and dust prevention and control device for underground coal mines according to claim 1 is characterized in that: A plurality of the water spray channels (32) are arranged on the water spray sleeve (31) in a circular array.

5. The comprehensive gas and dust prevention and control device for underground coal mines according to claim 1 is characterized in that: The cross section of the water spray channel (32) along the radial direction of the water spray sleeve (31) is in the shape of a dumbbell with tapered ends.

6. The comprehensive gas and dust prevention and control device for underground coal mines according to claim 1 is characterized in that: The water spray sleeve (31) has a transition cavity (33) inside, and the transition cavity (33) has a curved surface that protrudes toward the side wall of the water spray sleeve (31).

7. The comprehensive gas and dust prevention and control device for underground coal mines according to claim 1 is characterized in that: It also comprises a water storage box (41), wherein a water delivery pipe (44) is installed on a side of the water storage box (41) close to the water spray sleeve (31), and the water delivery pipe (44) is connected to the water spray sleeve (31) to provide a water source to the water spray sleeve (31); and a water inlet pipe (42) is installed on a side of the water storage box (41) away from the water spray sleeve (31).

8. The comprehensive gas and dust prevention and control device for underground coal mines according to claim 7 is characterized in that: The rotating shaft (51) is arranged in the air supply sleeve (21) and extends to the water spray sleeve (31) and the water delivery pipe (44); The shaft section of the rotating shaft (51) located in the air supply sleeve (21) is provided with a plurality of power blades (52), and the shaft section of the rotating shaft (51) located in the water delivery pipe (44) is provided with spiral water delivery blades (53); when fresh air is input into the air supply sleeve (21), the wind flow impacts the power blades (52), thereby driving the rotating shaft (51) and the spiral water delivery blades (53) thereon to rotate, thereby introducing the water flow in the water delivery pipe (44) into the water spray sleeve (31).

9. The comprehensive gas and dust prevention and control device for underground coal mines according to claim 8 is characterized in that: The plurality of power blades (52) are arranged on an axis section of the rotating shaft (51) located between the air supply port (23) and the interface between the air supply sleeve (21) and the air duct (11).

10. The comprehensive gas and dust prevention and control device for underground coal mines according to claim 8, characterized in that: The shaft section of the rotating shaft (51) located on the water spray sleeve (31) is sleeved with a rotating disk (61), and a plurality of arc-shaped guide blades (62) are arranged on the rotating disk (61).

Images