Local intelligent negative-pressure dry fog cooling and dust removing device with suspension type double-Laval structure

Abstract

The invention discloses a local intelligent negative-pressure dry fog cooling and dedusting device with a suspension type double-Laval structure, which comprises a plurality of negative-pressure cooling and dedusting dry fog assemblies and a pipeline system, and each negative-pressure cooling and dedusting dry fog assembly comprises a Laval air amplification device and a Laval wide-angle dry fog device, the Laval wide-angle dry fog device comprises a water injection pipe and a Laval spray pipe, a gap is reserved between the inner wall of the water injection pipe and the outer wall of the Laval spray pipe to form a water storage cavity, L-shaped water passing pipes are arranged on the two sides of the water injection pipe, and a nozzle is arranged at the bottom end of the water injection pipe; the top end of the water injection pipe is connected with a gas injection connector, the top end of the Laval spray pipe abuts against the gas injection connector, a gas injection opening only communicated with the Laval spray pipe is formed in the middle of the gas injection connector, and a gap is reserved between the outer wall of the bottom end of the Laval spray pipe and the inner wall of the spraying portion of the nozzle. The device is simple in structure, low in cost, high in operability, obvious in local cooling and dust falling effect and small in influence on coal miners.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine dust removal, and particularly relates to a local intelligent negative pressure dry fog cooling and dust removal device with a suspended double Laval structure. Background Art

[0002] With the advancement of the intelligentization, mechanization, and automation of the coal mining industry and the gradual deepening of coal mining from shallow to deep, the dust concentration has increased significantly, and the heat damage level has been continuously increasing, seriously endangering the occupational health of coal miners. Using the method of ventilation cooling and dust removal, the effect of reducing the mine temperature and dust concentration by increasing the air flow is limited, and conventional ventilation may not meet the corresponding requirements of safety regulations; artificial refrigeration cooling has many defects such as high cost, complex design and implementation, large heat emissions, and serious cold loss, making it difficult to be comprehensively promoted; spray sprinkling cooling, as a local cooling and dust removal method with low cost and strong operability, due to the relatively large droplet size, it is difficult to achieve an ideal state in terms of dust reduction and cooling effects, and it will cause the working face to be wet, having a negative impact on the safety of coal miners. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art, and particularly innovatively proposes a local intelligent negative pressure dry fog cooling and dust removal device with a suspended double Laval structure, which has low cost, strong operability, obvious local cooling and dust removal effects, and has little impact on coal miners.

[0004] To achieve the above object, the present invention provides a local intelligent negative pressure dry fog cooling and dust removal device with a suspended double Laval structure, including a plurality of negative pressure cooling and dust removal dry fog components and a pipeline system for providing wind force and water for the negative pressure cooling and dust removal dry fog components. The pipeline system is provided with a plurality of pipeline fixed suspension components for adjusting the installation angle of the pipeline system at intervals along its extending direction. The pipeline system includes a ventilation pipe and two water pipes;

[0005] The negative pressure cooling and dust removal dry fog component includes a Laval air amplification device and a Laval wide-angle dry fog device located inside the Laval air amplification device. The Laval wide-angle dry fog device includes a water injection pipe and a Laval nozzle fixedly arranged inside the water injection pipe. The outer diameter of the Laval nozzle is smaller than the inner diameter of the water injection pipe, so that there is a spacing between the inner wall of the water injection pipe and the outer wall of the Laval nozzle to form a water storage cavity. The two sides of the water injection pipe are provided with L-shaped water pipes respectively communicated with the two water pipes, and a nozzle is arranged at the bottom end of the water injection pipe;

[0006] The top end of the water injection pipe is connected with an air injection connector for blocking the top end of the water flow channel, and the top end of the Laval nozzle abuts against the air injection connector. The middle part of the air injection connector is provided with an air injection port that is only communicated with the Laval nozzle. The air injection connector is used to be communicated with a ventilation pipe. The bottom end of the Laval nozzle extends into the nozzle and is arranged near the spraying part of the nozzle. A gap for water to flow out is left between the outer wall of the bottom end of the Laval nozzle and the inner wall of the spraying part of the nozzle. An X-shaped swirl core is arranged near the bottom end inside the Laval nozzle. The X-shaped swirl core is used to spray irregular airflows, so as to break the liquid sprayed by the nozzle into droplets.

[0007] In the above solution: The Laval air amplification device includes a connecting cylinder that is communicated up and down. On both sides of the middle part of the connecting cylinder, there are L-shaped ventilation pipes for communicating with the ventilation pipe. The bottom end of the connecting cylinder is communicated with a horn-shaped air outlet cylinder. The top end of the air outlet cylinder is located inside the connecting cylinder and extends above the port of the L-shaped ventilation pipe. The top end of the air outlet cylinder is turned outwards to form a wind shielding edge. The upper port of the connecting cylinder is connected with a horn-shaped negative pressure air inlet cylinder. The bottom end of the negative pressure air inlet cylinder extends into the connecting cylinder. The bottom end of the negative pressure air inlet cylinder is adjacent to the top end of the air outlet cylinder, and an annular gap for the gas in the L-shaped ventilation pipe to flow through is left.

[0008] The convective effect can be increased through the Laval air amplification device, the wind resistance of the spray and the spray range are strengthened, and the cooling area range is further expanded.

[0009] The gas enters the L-shaped ventilation pipe from the branch pipe of the short air pipe of the ventilation duct. Then the gas enters the annular cavity and diffuses to the whole cavity. The annular gap is communicated with the annular cavity, the air amplifier throat and the negative pressure air inlet. The linear type of the annular gap adopts the Laval structure. When the gas enters the annular gap through the annular cavity, the gas is compressed, the speed and pressure increase. When flowing through the narrowest part of the annular gap, the pressure suddenly changes from positive pressure to negative pressure, the temperature decreases, and the speed increases from subsonic speed to sonic speed. Then it enters the expansion section, the space becomes slightly larger, the gas expands, the gas speed rises again, and the pressure and temperature continue to drop, and then quickly flows out of the annular gap. The negative pressure air inlet is located above the annular gap. When the high-speed air flow flowing out of the annular gap is affected by the wall attachment effect and adheres to the wall surface to flow, the negative pressure entrains the surrounding gas, so that the pressure of the negative pressure air inlet decreases, thus sucking in a large amount of air. Along with the high-speed air flow, it flows out towards the air outlet through the air amplifier throat together. A large amount of high-speed low-temperature gas ejected from the air outlet collides with the droplets ejected by the coaxial Laval wide-angle dry fog device, and the coverage range is wider. At the same time, the evaporation and convection of the droplets can both play a role in reducing the local temperature and improving the concentration of respirable dust.

[0010] In the above solution: A plurality of coaxial guiding rings are convexly provided on the outside of the Laval nozzle from top to bottom. The outer diameter of the coaxial guiding rings is the same as the inner diameter of the water injection pipe. External threads are provided on the outside of the uppermost coaxial guiding ring, and internal threads are provided in the water injection pipe corresponding to the uppermost coaxial guiding ring. A flow guiding through hole is vertically provided on the coaxial guiding ring located below the connecting part of the L-shaped water pipe.

[0011] In the above solution: The air flow passage of the Laval nozzle is divided into an air injection pipe section and a Laval pipe section arranged up and down. The inner diameter of the air injection pipe section is the same from top to bottom. The Laval pipe section is divided into a Laval contraction section, a Laval throat, a Laval initial expansion section, and a Laval outlet expansion section arranged in sequence from top to bottom. The X-shaped swirl core is arranged in the Laval outlet expansion section.

[0012] In the above solution: The length of the Laval throat is 0.3 times its inner diameter.

[0013] In the above solution: The pipeline fixing and hanging assembly includes an angle adjustment hanging device. A pipeline fixing device is suspended at the bottom of the angle adjustment hanging device. Water pipe fixing through holes and ventilation pipe fixing through holes are respectively provided on the pipeline fixing device corresponding to the water pipe and the ventilation pipe.

[0014] In the above solution: The angle adjustment hanging device includes a hanging fixing column. A hanging fixing through hole extending forward and backward is provided at the bottom end of the hanging fixing column. Connection hanging ears are provided on both sides of the front and back of the hanging fixing column at the top of the pipeline fixing device. Pipeline fixing through holes are provided in the middle of both connection hanging ears corresponding to the hanging fixing through hole, and are fixed by hollow bolts passing through the pipeline fixing through hole and the hanging fixing through hole at the same time.

[0015] In the above solution: Adjusting support ears are provided on both the left and right sides in the middle of the hanging fixing column. Adjusting through holes for the stud to pass through are vertically provided on the adjusting support ears. The bottom end of the stud is threadedly connected with a through hole connecting head. A horizontal through hole extending forward and backward is provided at the bottom end of the through hole connecting head. Steering through holes are provided on the connection hanging ears corresponding to the through hole connecting heads on both sides, and are fixed by hollow bolts passing through the through hole connecting head and the steering through hole at the same time.

[0016] In the above solution: An intelligent monitoring component is provided on each pipeline fixing and hanging assembly; and two adjacent intelligent monitoring components are respectively arranged towards the left and right sides;

[0017] The intelligent monitoring component includes a telescopic bracket extending left and right. The telescopic bracket is fixed on the pipeline fixing device, and an infrared camera and a dust concentration sensor are arranged at the extending end of the telescopic bracket. In the above solution: water pipe branches are connected to the corresponding L-shaped water pipes communicating with the L-shaped water pipe. A duct connection unit is equipped for each negative pressure cooling and dust removal dry fog component on the ventilation pipe. The duct connection unit includes a long duct branch and two short duct branches. The long duct branch is used to communicate with the gas injection connector, and the short duct branch is used to communicate with the L-shaped ventilation pipe. And a pipe internal thread joint is arranged at the top of the L-shaped ventilation pipe. External threads for threaded connection with the L-shaped ventilation pipe and the short duct branch are arranged at the upper and lower ends of the pipe internal thread joint respectively.

[0018] In summary, the beneficial effects of the present invention are as follows:

[0019] 1. For the overheating situation in the local area not covered by the air supply in the intake airway, the irregular airflow ejected by the Laval nozzle arranged scatters the liquid ejected by the Laval wide-angle dry fog device, generating low-temperature dry fog with higher particle size and concentration, which absorbs heat by evaporation, reduces the surrounding environment temperature, and has a wider coverage range, further improving the heat absorption capacity in the local area, and effectively improving the concentration of respirable dust, ensuring the physical health of coal miners;

[0020] 2. By setting the integrated Laval air amplification device and the Laval wide-angle dry fog device to work together to form a double Laval structure, the external Laval air amplification device increases the external air flow rate and flow range, drives the spray ejected by the internal Laval wide-angle dry fog device to diffuse outward, increases the convection effect, strengthens the wind resistance and spray range of the spray, further expands the cooling area range, and improves the dust removal and cooling effect;

[0021] 3. By setting the pipeline fixing and hanging component to change the installation angle of the pipeline system according to the different air flow conditions in the roadway, the spray coverage range can accurately cover the high-temperature and high-concentration scenarios;

[0022] 4. The evaporation of the generated low-temperature dry fog absorbs heat and the decrease in the environmental temperature play a role in increasing the water vapor content and relative humidity in the air. At this time, the high-efficiency sedimentation of respirable dust is realized according to the synergistic effect of the heterogeneous nucleation mechanism on the surface of fine particles and the droplet inertial collision mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the device of the present invention.

[0024] Figure 2 It is a schematic diagram of the pipeline fixing and hanging component.

[0025] Figure 3 It is an exploded view of the pipeline fixing and hanging component.

[0026] Figure 4 It is a schematic structural diagram of an intelligent monitoring component.

[0027] Figure 5 It is a schematic structural diagram of a pipeline system.

[0028] Figure 6 It is a three-dimensional view of a negative pressure cooling, dust removal and dry fog component.

[0029] Figure 7 It is a three-dimensional view of a Laval wide-angle dry fog device.

[0030] Figure 8 It is a sectional view of a Laval wide-angle dry fog device.

[0031] Figure 9 It is a three-dimensional view of a Laval air amplification device.

[0032] Figure 10 It is a sectional view of a Laval air amplification device.

[0033] Figure 11 It is a three-dimensional view of a Laval nozzle.

[0034] Figure 12 It is a sectional view of a Laval nozzle. Specific embodiments

[0035] The present invention will be further described below through embodiments in conjunction with the accompanying drawings:

[0036] As Figures 1 to 12 shown, a partial intelligent negative pressure dry fog cooling and dust removal device with a suspended double Laval structure includes a plurality of negative pressure cooling, dust removal and dry fog components 4000 and a pipeline system 3000 for providing wind force and water for the negative pressure cooling, dust removal and dry fog components 4000. The pipeline system 3000 is provided with a plurality of pipeline fixed suspension components 1000 for adjusting the installation angle of the pipeline system 3000 at intervals along its extending direction. The pipeline system 3000 includes a ventilation pipe 3200 and two water pipes 3100. Among them, the two water pipes 3100 are respectively a water inlet pipe and a water return pipe; and are respectively located on both sides of the ventilation pipe 3200.

[0037] The negative pressure cooling and dust removal dry fog assembly 4000 includes an integrated Laval air amplification device 4200 and a Laval wide-angle dry fog device 4100 located within the Laval air amplification device 4200. The Laval wide-angle dry fog device 4100 includes a water injection pipe 4110 and a Laval nozzle 4120 threadedly connected and fixed within the pipe of the water injection pipe 4110. The outer diameter of the Laval nozzle 4120 is smaller than the inner diameter of the water injection pipe 4110, such that a spacing is left between the inner wall of the water injection pipe 4110 and the outer wall of the Laval nozzle 4120 to form a water storage cavity a. On both sides of the water injection pipe 4110, there are provided L-shaped water pipes 4113 respectively communicating with two water pipes 3100. Corresponding to the L-shaped water pipes 4113, both water pipes 3100 are connected with water pipe branches 3110. At the bottom end of the water injection pipe 4110, there is provided a nozzle 4130. And the spacing between the water pipe branches 3110 is 40 cm.

[0038] The Laval nozzle 4120 and the inner primary contraction section of the nozzle 4130 cooperate to form a liquid pressurization area, accelerating the liquid flow to obtain a higher pressure. The Laval nozzle 4120 and the inner long diameter section of the nozzle 4130 cooperate to stabilize the water pressure and reduce the head loss, and also help to reduce the water hammer effect. The Laval nozzle 4120 and the secondary contraction section cooperate to form an adjustable liquid film, such that the nozzle 4130 is an adjustable liquid film nozzle; the flow guiding hole of the Laval nozzle 4120 cooperates with the nozzle 4130 to enable the water in the water storage cavity a to enter the liquid pressurization area.

[0039] At the top end of the water injection pipe 4110, there is connected an air injection connector 4111 for blocking the top end of the water flow channel, and the top end of the Laval nozzle 4120 abuts against the air injection connector 4111. In the middle of the air injection connector 4111, there is provided an air injection port only communicating with the Laval nozzle 4120, and the air injection connector 4111 is used to communicate with the ventilation pipe 3200. The bottom end of the Laval nozzle 4120 extends into the nozzle 4130 and is arranged adjacent to the ejection part of the nozzle 4130, and a gap for the water to flow out is left between the outer wall of the bottom end of the Laval nozzle 4120 and the inner wall of the ejection part of the nozzle 4130. Inside the pipe of the Laval nozzle 4120, near the bottom end, there is provided an X-shaped swirl core 4124, and the X-shaped swirl core 4124 is used to eject irregular airflows, thereby breaking the liquid ejected from the nozzle 4130 into droplets.

[0040] Outside the Laval nozzle 4120, there are successively convexly provided a plurality of coaxial guiding rings from top to bottom, and the outer diameter of the coaxial guiding rings is the same as the inner diameter of the water injection pipe 4110. On the outside of the uppermost coaxial guiding ring, there is provided an external thread, and inside the water injection pipe 4110, corresponding to the uppermost coaxial guiding ring, there is provided an internal thread. Through this external thread and internal thread, the threaded connection between the water injection pipe 4110 and the Laval nozzle 4120 is realized. At the same time, it can also prevent the Laval nozzle 4120 from deforming.

[0041] A coaxial guide ring located below the connecting part of the L-shaped water pipe 4113 is vertically provided with a flow guiding hole 4122 to ensure the outflow of liquid. At the same time, a groove for installing a rubber ring is provided on the guide ring to seal between the water injection pipe 4110 and the Laval nozzle 4120.

[0042] The air flow channel of the Laval nozzle 4120 is divided into an air injection pipe section 4121 and a Laval pipe section 4123 arranged vertically. The inner diameter of the air injection pipe section 4121 is the same from top to bottom. The Laval pipe section 4123 is divided into a Laval contraction section b, a Laval throat c, a Laval initial expansion section d, and a Laval outlet expansion section e arranged in sequence from top to bottom. The X-shaped swirl core 4124 is arranged in the Laval outlet expansion section e. The length of the Laval throat c is 0.3 times its inner diameter. The angle of the Laval initial expansion section d is approximately 5° - 10° smaller than that of the Laval contraction section b, and the angle of the Laval outlet expansion section e gradually approaches 0°.

[0043] And the curve equation of the part of the Laval initial expansion section d of the cross-section of the Laval nozzle 4120 is where y is the ordinate, y * is the ordinate of the turning point B, and the turning point B is the part with the smallest radius in the part where the Laval nozzle contracts and then expands. x B is the abscissa of the turning point B, β B is the maximum expansion angle, and x is the abscissa of any point.

[0044] The curve equation of the Laval contraction section b part is where r is the radius of the nozzle at any point, r * is the radius of the nozzle outlet, x is the distance from the nozzle outlet to any point, l is the distance from the nozzle outlet to the starting point of the nozzle contraction, that is, the total length of the nozzle. c is a constant used to adjust the shape of the profile to meet specific design requirements.

[0045] The gas enters the coaxial water injection pipe sleeve 4114 of the coaxial water injection pipe 4110 through the long air duct branch pipe 3220 of the ventilation duct 3200, and then flows into the gas injection pipe section 4121 of the Laval nozzle 4120. After that, the gas continues to flow through the Laval contraction section b, which further compresses the gas, thereby increasing the velocity of the air flow. As the gas passes through the Laval throat c, the pressure instantaneously changes from positive pressure to negative pressure within a very small range, and the temperature drops. Entering the initial expansion section d of the Laval nozzle 4120, the gas expands due to the expansion of the space, and its expansion velocity exceeds the flow velocity, generating a forward thrust, which further increases the gas velocity, while the pressure and temperature continue to drop. Subsequently, the gas enters the outlet expansion section e of the Laval nozzle 4120, and the velocity, pressure, and temperature of the gas gradually stabilize, forming a high-speed, negative-pressure, and low-temperature gas flow. This gas passes through the X-shaped swirl core 4124 and evenly diffuses into the external space, impacting the adjustable liquid film formed by the cooperation of the Laval nozzle 4120 and the secondary contraction section 4133. The liquid film is evenly broken into extremely fine droplets during this process and diffuses evenly in all directions. Due to the low temperature of the gas, these fine droplets further reduce the temperature through convection. When the surrounding air temperature is high, these cooler droplets are prone to evaporation and absorb heat, thereby reducing the temperature of the surrounding environment. At the same time, the formed water vapor increases the humidity of the air. With the continuous operation of the device, heterogeneous nucleation occurs on the surface of the dust particles and inertial collisions between the spray and the particles, achieving effective dust reduction for respirable dust.

[0046] The Laval air amplification device 4200 includes a connecting cylinder that communicates up and down. On both sides of the middle of the connecting cylinder, there are L-shaped air ducts 4220 for communicating with the ventilation duct 3200. The bottom end of the connecting cylinder is connected to a flared air outlet cylinder 4270 with a smaller upper part and a larger lower part. The top end of the air outlet cylinder 4270 is located inside the connecting cylinder and extends above the port of the L-shaped air duct 4220. There is an annular cavity 4230 left between the top end of the air outlet cylinder 4270 and the inside of the connecting cylinder. The top end of the air outlet cylinder 4270 is turned outward to form a wind-blocking edge. The upper port of the connecting cylinder is connected to a flared negative-pressure air inlet cylinder 4260 with a larger upper part and a smaller lower part. The bottom end of the negative-pressure air inlet cylinder 4260 extends into the connecting cylinder. The bottom end of the negative-pressure air inlet cylinder 4260 is adjacent to the top end of the air outlet cylinder 4270, and there is an annular gap 4240 for the gas in the L-shaped air duct 4220 to flow through.

[0047] The convection effect can be increased through the Laval air amplification device 4200, the wind resistance of the spray and the spray range can be strengthened, and the cooling area range is further expanded.

[0048] A duct connection unit is provided on the ventilation duct 3200 corresponding to each negative pressure cooling, dust removal and dry fog assembly 4000. The duct connection unit includes a long duct branch 3220 and two short duct branches 3210. The long duct branch 3220 is used to communicate with the gas injection connector 4111, and the short duct branch 3210 is used to communicate with the L-shaped ventilation pipe 4220. An internal thread joint 4210 is provided at the top of the L-shaped ventilation pipe 4220, and external threads for threaded connection with the L-shaped ventilation pipe 4220 and the short duct branch 3210 are provided at the upper and lower ends of the internal thread joint 4210 respectively. The two short duct branches 3210 are respectively located on the front and rear sides of the long duct branch 3220, and both the short duct branch 3210 and the long duct branch 3220 are used to connect the ventilation duct 3200 and the negative pressure cooling, dust removal and dry fog assembly 4000. The inner diameters of the bottom end of the negative pressure air inlet cylinder 4260 and the top end of the air outlet cylinder 4270 are the same. The internal pipe of the nozzle 4130 is composed of a primary contraction section 4131, a long diameter section 4132, a secondary contraction section 4133 and an expansion section 4134.

[0049] Gas enters the L-shaped ventilation pipe 4220 from the short duct branch 3210 of the ventilation duct 3200, and then the gas enters the annular cavity 4230 and diffuses throughout the cavity; the annular gap 4240 communicates with the annular cavity 4230, the air amplifier throat 4250 and the negative pressure air inlet 4260. The linear type of the annular gap 4240 adopts a Laval structure. When the gas enters the annular gap through the annular cavity 4230, the gas is compressed, and the speed and pressure increase. When flowing through the narrowest part of the annular gap 4240, the pressure suddenly changes from positive pressure to negative pressure, the temperature decreases, and the speed increases from subsonic to sonic. Then it enters the expansion section, the space becomes slightly larger, the gas expands, the gas speed rises again, and the pressure and temperature continue to drop, and the gas quickly flows out of the annular gap 4240; the negative pressure air inlet 4260 is located above the annular gap 4230. When the high-speed air flow flowing out of the annular gap 4240 is affected by the wall attachment effect and adheres to the wall surface to flow, the negative pressure entrains the surrounding gas, reducing the pressure at the negative pressure air inlet 4260, thereby inhaling a large amount of air, and flowing out towards the air outlet 4270 together with the high-speed air flow through the air amplifier throat 4250; a large amount of high-speed and low-temperature gas ejected from the air outlet 4270 collides with the droplets ejected from the coaxial Laval wide-angle dry fog device 4100, covering a wider range. At the same time, the evaporation and convection of the droplets can both play a role in reducing the local temperature and improving the concentration of respirable dust.

[0050] The pipeline fixing and hanging assembly includes an angle-adjusting hanging device 1100. A pipeline fixing device 1200 is suspended at the bottom of the angle-adjusting hanging device 1100. Water pipe fixing through holes 1230 and ventilation pipe fixing through holes 1240 are respectively provided on the pipeline fixing device 1200 corresponding to the water pipe 3100 and the ventilation pipe 3200.

[0051] The angle-adjustable suspension device 1100 includes a suspension fixing column 1110. At the bottom end of the suspension fixing column 1110, there is a suspension fixing through hole 1112 extending forward and backward. On the top of the pipe fixing device 1200, there are connecting lugs located on both the front and rear sides of the suspension fixing column 1110. In the middle of the two connecting lugs on both sides, pipe fixing through holes 1220 are correspondingly provided for the suspension fixing through hole 1112, and they are fixed by a hollow bolt 1130 that passes through both the pipe fixing through hole 1220 and the suspension fixing through hole 1112 at the same time. The hollow bolt 1130 is equipped with a nut 1150.

[0052] On the left and right sides of the middle part of the suspension fixing column 1110, adjusting lugs are provided. On the adjusting lugs, there are vertically arranged adjusting through holes 1111 for the stud 1120 to pass through. At the bottom end of the stud 1120, there is a through hole connector 1140 threadedly connected. At the bottom end of the through hole connector 1140, there is a horizontally extending through hole 1142 extending forward and backward. On the connecting lugs, steering through holes 1210 are provided corresponding to the through hole connectors 1140 on both sides, and they are fixed by a hollow bolt 1130 that passes through the through hole connector 1140 and the steering through hole 1210 at the same time.

[0053] Each pipe fixing and suspension assembly 1000 is provided with an intelligent monitoring component 2000; and two adjacent intelligent monitoring components 2000 are respectively arranged towards the left and right sides;

[0054] The intelligent monitoring component 2000 includes a telescopic bracket 2100 extending left and right. The telescopic bracket 2100 is fixed on the pipe fixing device 1200. On the extending end of the telescopic bracket 2100, there are an infrared camera 2200 and a dust concentration sensor 2300. The temperature and dust concentration on both sides of the device are monitored by the infrared camera 2200 and the dust concentration sensor 2300. When the temperature is abnormal or the dust concentration is too high, an electrical signal is sent to turn on the device for cooling and dust removal.

Claims

1. A local intelligent negative pressure dry mist cooling and dust removal device with a suspended double Laval structure, characterized in that: The invention comprises a plurality of negative pressure cooling and dust removal dry mist assemblies (4000) and a pipeline system (3000) for providing wind and water to the negative pressure cooling and dust removal dry mist assemblies (4000); the pipeline system (3000) is provided with a plurality of pipeline fixing suspension assemblies (1000) for adjusting the installation angle of the pipeline system (3000) at intervals along its extension direction; and the pipeline system (3000) comprises a ventilation pipe (3200) and two water pipes (3100); The negative pressure cooling and dust removal dry fog assembly (4000) comprises a Laval air amplifying device (4200) and a Laval wide-angle dry fog device (4100) located in the Laval air amplifying device (4200); the Laval wide-angle dry fog device (4100) comprises a water injection pipe (4110) and a Laval nozzle (4120) fixedly arranged in the water injection pipe (4110); the outer diameter of the Laval nozzle (4120) is smaller than the inner diameter of the water injection pipe (4110), so that a distance is left between the inner wall of the water injection pipe (4110) and the outer wall of the Laval nozzle (4120) to form a water storage chamber; L-shaped water pipes (4113) respectively connected to two water pipes (3100) are arranged on both sides of the water injection pipe (4110); and a nozzle (4130) is arranged at the bottom end of the water injection pipe (4110); The top of the water injection pipe (4110) is connected to a gas injection connector (4111) for blocking the top of the water flow channel, and the top of the Laval nozzle (4120) is against the gas injection connector (4111), and the middle of the gas injection connector (4111) is provided with a gas injection port that is only connected to the Laval nozzle (4120). The gas injection connector (4111) is used to communicate with the ventilation pipe (3200), and the bottom of the Laval nozzle (4120) is connected to the ventilation pipe (3200). The end extends into the nozzle (4130) and is arranged near the spraying part of the nozzle (4130), and a gap for water to flow out is left between the outer wall of the bottom end of the Laval nozzle (4120) and the inner wall of the spraying part of the nozzle (4130), and an X-shaped swirl core (4124) is arranged near the bottom end of the Laval nozzle (4120), and the X-shaped swirl core (4124) is used to spray irregular airflow, thereby breaking the liquid sprayed from the nozzle (4130) into droplets.

2. According to the local intelligent negative pressure dry mist cooling and dust removal device of the suspended double Laval structure of claim 1, it is characterized by: The Laval air amplification device (4200) includes a connecting tube connected to each other from top to bottom, and L-shaped ventilation pipes (4220) for connecting to the ventilation pipe (3200) are arranged on both sides of the middle of the connecting tube. The bottom end of the connecting tube is connected to a trumpet-shaped air outlet tube (4270), and the top end of the air outlet tube (4270) is located in the connecting tube and extends to the top of the port of the L-shaped ventilation pipe (4220). The top end of the air outlet tube (4270) is folded outward to have a wind shield edge, and the upper port of the connecting tube is connected to a trumpet-shaped negative pressure air inlet tube (4260). The bottom end of the negative pressure air inlet tube (4260) extends into the connecting tube, and the bottom end of the negative pressure air inlet tube (4260) is adjacent to the top end of the air outlet tube (4270), and an annular gap (4240) is left for the gas in the L-shaped ventilation pipe (4220) to flow through.

3. According to claim 1, the local intelligent negative pressure dry mist cooling and dust removal device with a suspended double Laval structure is characterized in that: The Laval nozzle (4120) is provided with a plurality of coaxial guide rings protruding from top to bottom in sequence, the outer diameter of the coaxial guide rings being consistent with the inner diameter of the water injection pipe (4110), the outer side of the top coaxial guide ring being provided with an external thread, and the water injection pipe (4110) being provided with an internal thread corresponding to the top coaxial guide ring; a diversion hole (4122) is vertically provided on the coaxial guide ring located below the connecting portion of the L-shaped water pipe (4113).

4. According to claim 3, the local intelligent negative pressure dry mist cooling and dust removal device with a suspended double Laval structure is characterized in that: The air flow channel of the Laval nozzle (4120) is divided into an air injection pipeline section (4121) and a Laval pipeline section (4123) which are arranged in upper and lower parts. The air injection pipeline section (4121) has a consistent inner diameter from top to bottom. The Laval pipeline section (4123) is divided into a Laval contraction section (b), a Laval throat (c), a Laval initial expansion section (d) and a Laval outlet expansion section (e) which are arranged in sequence from top to bottom. The X-shaped swirl core (4124) is arranged in the Laval outlet expansion section (e).

5. According to claim 4, the local intelligent negative pressure dry mist cooling and dust removal device with a suspended double Laval structure is characterized in that: The length of the Laval throat (c) is 0.3 times its inner diameter.

6. According to claim 1, the local intelligent negative pressure dry mist cooling and dust removal device with a suspended double Laval structure is characterized by: The pipeline fixing suspension assembly comprises an angle adjustment suspension device (1100), a pipeline fixing device (1200) is suspended at the bottom of the angle adjustment suspension device (1100), and the pipeline fixing device (1200) is provided with a water pipe fixing through hole (1230) and a ventilation pipe fixing through hole (1240) corresponding to the water pipe (3100) and the ventilation pipe (3200), respectively.

7. The local intelligent negative pressure dry mist cooling and dust removal device with a suspended double Laval structure according to claim 6 is characterized in that: The angle adjustment suspension device (1100) comprises a suspension fixing column (1110), the bottom end of which is provided with a suspension fixing through hole (1112) extending forward and backward, and the top of the pipe fixing device (1200) is provided with connecting ears located on the front and rear sides of the suspension fixing column (1110), and the middle parts of the connecting ears on both sides are provided with pipe fixing through holes (1220) corresponding to the suspension fixing through holes (1112), and are fixed by hollow bolts (1130) that pass through both the pipe fixing through holes (1220) and the suspension fixing through holes (1112).

8. The local intelligent negative pressure dry mist cooling and dust removal device with a suspended double Laval structure according to claim 7 is characterized in that: Adjustment ears are provided on both sides of the middle of the suspension fixing column (1110), and an adjustment through hole (1111) is vertically provided on the adjustment ear for the stud (1120) to pass through. The bottom end of the stud (1120) is threadedly connected with a through hole connector (1140), and a horizontal through hole (1142) extending forward and backward is opened at the bottom end of the through hole connector (1140). The through hole connectors (1140) on the corresponding sides of the connecting ear are provided with steering through holes (1210), and are fixed by hollow bolts (1130) that pass through the through hole connector (1140) and the steering through holes (1210) at the same time.

9. According to claim 1, the local intelligent negative pressure dry mist cooling and dust removal device with a suspended double Laval structure is characterized by: Each of the pipeline fixing and hanging components (1000) is provided with an intelligent monitoring component (2000); and two adjacent intelligent monitoring components (2000) are respectively provided on the left and right sides; The intelligent monitoring component (2000) comprises a telescopic bracket (2100) extending left and right, the telescopic bracket (2100) being fixed on a pipeline fixing device (1200), and an infrared camera (2200) and a dust concentration sensor (2300) being arranged on the extended end of the telescopic bracket (2100).

10. The local intelligent negative pressure dry mist cooling and dust removal device with a suspended double Laval structure according to claim 1 is characterized in that: The two water pipes (3100) are connected to the water pipe branches (3110) corresponding to the L-shaped water pipes (4113), and the ventilation pipe (3200) is equipped with an air duct connection unit corresponding to each negative pressure cooling and dust removal dry fog assembly (4000), and the air duct connection unit includes a long air duct branch (3220) and two short air duct branches (3210), the long air duct branch (3220) is used to be connected to the gas injection connector (4111), and the short air duct branch (3210) is used to be connected to the L-shaped ventilation pipe (4220), and the top end of the L-shaped ventilation pipe (4220) is provided with an endotracheal thread joint (4210), and the upper and lower ends of the endotracheal thread joint (4210) are provided with external threads for threaded connection with the L-shaped ventilation pipe (4220) and the short air duct branch (3210), respectively.

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