A mine double inner and outer disturbance self-excitation oscillation jet nozzle and operation method

Abstract

The application provides a mining inner-outer double disturbance self-excited oscillation jet flow nozzle and operation method, which comprises a shell with a self-excited oscillation chamber, a mixing inlet communicated with the self-excited oscillation chamber is arranged on one side of the shell, a jetting outlet communicated with the self-excited oscillation chamber is arranged on the other side of the shell, a double-port pipe is connected to the mixing inlet, the double-port pipe comprises a vertical air inlet pipe and a horizontal liquid inlet pipe, the vertical air inlet pipe and the horizontal liquid inlet pipe are vertically communicated with a vertical mixing pipe, an X-shaped rotating flow core is arranged in the vertical air inlet pipe, the inlet of the horizontal liquid inlet pipe is arranged along the tangent direction of the flow channel of the vertical air inlet pipe, the self-excited oscillation chamber is a conical cavity, the small-diameter end of the conical cavity is communicated with the mixing inlet, the large-diameter end of the conical cavity is concave along the axis to form an inner recess, and the inner recess is communicated with the jetting outlet. High-frequency oscillation is generated in the self-excited oscillation chamber, which forms the "inner-outer double disturbance" atomization form together, induces more vortex energy, strengthens the cavitation effect of the nozzle, and effectively improves the atomization effect.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology and relates to a jet nozzle dust removal device, particularly a mining-use internal and external dual-disturbance self-excited oscillating jet nozzle and its operation method. Background Technology

[0002] With the continuous improvement of mechanization, automation, and intelligent technology in coal mining, annual coal production is also constantly increasing. Dust is one of the five major hazards in coal mines. The introduction of large-scale mechanized mining equipment has led to increased dust generation intensity and volume. High concentrations of dust not only trigger coal dust explosions but also cause a series of new problems, such as an increased incidence of pneumoconiosis, which have become a critical challenge that urgently needs to be addressed in underground coal mines.

[0003] Spray dust suppression, as a typical dust removal technology, is widely used in dust-generating areas of various coal mine operations. The atomization effect of the nozzle is a crucial factor affecting dust suppression efficiency; however, existing nozzles generally have poor atomization performance, especially under low-pressure conditions. The atomized droplets are relatively large, with low fragmentation, making the mist field easily dispersed. This results in low droplet-dust collision and agglomeration efficiency, leading to mediocre dust suppression. Therefore, there is an urgent need to research a new type of high-efficiency atomizing nozzle for use in mines. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a mine-use internal and external dual-disturbance self-excited oscillating jet nozzle and its operation method.

[0005] The objective of this invention can be achieved through the following technical solution: a mining-use internal and external dual-disturbance self-excited oscillation jet nozzle, comprising a shell with an internal self-excited oscillation chamber, a mixing inlet connected to the self-excited oscillation chamber on one side of the shell, and a jet outlet connected to the self-excited oscillation chamber on the other side, a dual-port fitting connected to the mixing inlet, the dual-port fitting comprising a vertical air inlet pipe and a horizontal liquid inlet pipe, the vertical air inlet pipe and the horizontal liquid inlet pipe being perpendicularly connected to the vertical mixing pipe, an X-shaped vortex core being provided inside the vertical air inlet pipe, the inlet of the horizontal liquid inlet pipe being arranged along the tangential direction of the flow channel of the vertical air inlet pipe, the self-excited oscillation chamber being a conical cavity, the center of the small diameter end of the conical cavity being connected to the mixing inlet, and the center of the large diameter end of the conical cavity being concave along the axis to form an indentation, the indentation being connected to the jet outlet.

[0006] In the aforementioned mining-grade internal and external dual-disturbance self-excited oscillation jet nozzle, the self-excited oscillation chamber has a smooth inner wall, the periphery of the small-diameter end of the self-excited oscillation chamber is rounded and chamfered, the periphery of the large-diameter end of the self-excited oscillation chamber is rounded and chamfered, the large-diameter end of the self-excited oscillation chamber and the recessed opening are connected by an arc-shaped surface, and a ring-shaped vortex space is formed between the large-diameter end of the self-excited oscillation chamber and the recessed opening.

[0007] In the aforementioned mining-grade internal and external dual-disturbance self-excited oscillating jet nozzle, the X-shaped swirling core includes at least two swirling blades arranged in a cross configuration, with guide and deflection plates bent at both ends of the swirling blades.

[0008] In the above-mentioned mining-use internal and external dual-disturbance self-excited oscillating jet nozzle, the vertical air inlet pipe has a vertical cavity, which is connected to the mixing cavity of the vertical mixing pipe through a vertical constriction; the horizontal liquid inlet pipe has a horizontal cavity, which is connected to the mixing cavity of the vertical mixing pipe through a horizontal constriction.

[0009] In the above-mentioned mining-use internal and external dual disturbance self-excited oscillating jet nozzle, the center of the vertical mixing pipe is connected to the vertical constriction to form a gas flow channel, the outer periphery of the gas flow channel forms a liquid flow channel, and the liquid flow channel is connected to the horizontal constriction.

[0010] In the above-mentioned mining internal and external dual disturbance self-excited oscillating jet nozzle, the housing is fixed with a flow collecting shroud on the outside of the jet outlet. The flow collecting shroud is a conical shroud that gradually expands outward from the housing. Several negative pressure suction ports are formed around the outer peripheral wall of the conical shroud. The negative pressure suction ports are trapezoidal.

[0011] In the above-mentioned mining-use internal and external dual disturbance self-excited oscillating jet nozzle, the vertical air inlet pipe is connected to the air pressure pump through a gas pipeline; the horizontal liquid inlet pipe is connected to the purifier, filter, and high-pressure pump in sequence through a liquid pipeline.

[0012] A method for operating a mining-use internal and external dual-disturbance self-excited oscillating jet nozzle includes the following steps:

[0013] S1. Turn on the air pump and input airflow into the vertical air inlet pipe through the gas pipeline. The airflow passes through the X-shaped vortex core and rotates clockwise at high speed to enhance the rotation characteristics of the airflow. Then the airflow enters the gas flow channel of the vertical mixing pipe to form a clockwise vortex.

[0014] S2. The high-pressure pump is turned on to deliver high-pressure water through the liquid pipeline. The high-pressure water is filtered and purified before entering the horizontal liquid inlet pipe. Then, the high-pressure water flows tangentially into the liquid channel of the vertical mixing pipe to form a counterclockwise swirling flow and generate a central low-pressure cavity.

[0015] S3. The clockwise swirling gas comes into contact with and mixes with the counterclockwise swirling high-pressure water. The high-speed friction and collision between the gas and liquid generate turbulent pulsations, which increases the droplet fragmentation and atomization.

[0016] S4. After the gas-liquid swirls, they simultaneously enter the self-excited oscillation chamber. The liquid jet exchanges energy and momentum with the air in the self-excited oscillation chamber, causing an unstable shear layer to form at the gas-liquid interface. The fluid around the shear layer is entrained to form a vortex. The intervention of the gas jet causes the shear layer to be divided into an inner shear layer and an outer shear layer, forming a double disturbance atomization form, which enhances the cavitation effect of the liquid jet in the self-excited oscillation chamber and strengthens the degree of droplet breakup.

[0017] S5. Finally, jet droplets are ejected from the spray outlet of the shell to form a dust-suppressing fog field.

[0018] In the above-mentioned operation method of the mining internal and external dual disturbance self-excited oscillating jet nozzle, in step S4, the liquid jet collides with the concave wall of the vortex space, causing the liquid jet to flow back upstream and induce vortex rings, while simultaneously triggering radial pulsation, causing the central jet to undergo periodic compression and expansion, forming an oscillating pulse jet, and enhancing the turbulent energy between gas and liquid.

[0019] In the above-mentioned operation method of the mining internal and external double disturbance self-excited oscillating jet nozzle, in step S5, the jet droplets form an umbrella-shaped spray constraint shape through the collecting hood, and the dust-laden airflow on the outer periphery enters the collecting hood through the negative pressure suction port. The dust-laden airflow mixes with the fog field, causing the dust and droplets to collide and become wetted, increasing their weight. Under the action of gravity, they settle, achieving the dust removal effect.

[0020] Compared with existing technologies, the self-excited oscillating jet nozzle and its operation method for mining applications with internal and external dual disturbances have the following advantages:

[0021] 1. The gas-liquid jet exchanges momentum with the air inside the oscillating chamber, generating high-frequency oscillations within the self-excited oscillating chamber. The gas jet is differentiated into inner and outer shear layers, continuously entraining liquid to form vortices, which then impact the walls of the self-excited oscillating chamber, collectively creating a "double disturbance" atomization pattern. This induces the formation of more vortex energy, enhancing the cavitation effect of the nozzle and effectively improving the atomization effect. The self-excited oscillating chamber is designed as a curved cavity, avoiding the formation of secondary vortices at sharp corners and reducing friction loss along the path.

[0022] 2. The negative pressure generated by the shroud purifies the surrounding polluted air and also acts as a fog field beam, increasing the effective range of the fog field.

[0023] 3. This invention has the advantages of small atomized particle size, low energy consumption, stable spray pattern, and easy maintenance. It has a wide range of applications and broad application prospects. Attached Figure Description

[0024] Figure 1This is a cross-sectional view of the self-excited oscillating jet nozzle with internal and external dual disturbances used in this mine.

[0025] Figure 2 This is a cross-sectional view of the vertical mixing pipe in the self-excited oscillating jet nozzle with internal and external dual disturbances used in this mine.

[0026] Figure 3 This is a schematic diagram of the atomization mechanism of the self-excited oscillation chamber in the self-excited oscillation jet nozzle with internal and external dual disturbances used in this mine.

[0027] Figure 4 This is a structural diagram of the self-excited oscillating jet nozzle with internal and external dual disturbances used in this mine.

[0028] In the diagram, 1 is the vertical air inlet pipe; 2 is the X-shaped vortex core; 3 is the horizontal liquid inlet pipe; 4 is the vertical mixing pipe; 4a is the gas flow channel; 4b is the liquid flow channel; 5 is the self-excited oscillation chamber; 5a is the shear layer; 5b is the vortex; 5c is the vortex ring; 5d is the jet outlet; 6 is the flow collector; and 6a is the negative pressure suction port. Detailed Implementation

[0029] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and specific examples:

[0030] Example 1

[0031] like Figures 1 to 4 As shown, the self-excited oscillating jet nozzle for mining uses internal and external dual disturbances includes a shell with a self-excited oscillating chamber 5 inside. A mixing inlet is opened on one side of the shell and connected to the self-excited oscillating chamber 5, and a jet outlet 5d is opened on the other side and connected to the self-excited oscillating chamber 5. A double-port fitting is connected to the mixing inlet. The double-port fitting includes a vertical air inlet pipe 1 and a horizontal liquid inlet pipe 3. The vertical air inlet pipe 1 and the horizontal liquid inlet pipe 3 are perpendicularly connected to the vertical mixing pipe 4. An X-shaped swirl core 2 is set inside the vertical air inlet pipe 1. The inlet of the horizontal liquid inlet pipe 3 is set along the tangent direction of the flow channel of the vertical air inlet pipe 1. The self-excited oscillating chamber 5 is a conical cavity. The center of the small diameter end of the conical cavity is connected to the mixing inlet. The center of the large diameter end of the conical cavity is concave along the axis to form an indentation. The indentation is connected to the jet outlet 5d.

[0032] The shell is made of steel or metal alloy, which has high material strength to prevent coal blocks from falling and damaging the nozzle body. The axis of the horizontal liquid inlet pipe 3 does not pass through the central axis of the nozzle body. It is designed to be off-axis so that the water flows in from the tangential position, forming a strong counterclockwise vortex and generating a low-pressure vortex cavity in the central area, which makes it easier to introduce gas.

[0033] The self-excited oscillation chamber 5 has a smooth inner wall. The periphery of both the small-diameter and large-diameter ends of the self-excited oscillation chamber 5 has rounded chamfers. The large-diameter end of the self-excited oscillation chamber 5 and the recessed opening are connected by an arc-shaped transition surface, forming a ring-shaped vortex space between them. The self-excited oscillation chamber 5 has an axisymmetric structure, with its diameter gradually increasing from the mixing inlet to the injection outlet 5d. The combination of smooth walls and an arc-shaped design eliminates obstacles to the gas-liquid hybrid mixing process, prevents vortex dead zones, avoids the formation of secondary vortices at sharp corners, reduces energy loss, further enhances the turbulence of the gas-liquid mixture, and is beneficial for increasing the effective range of the fog field.

[0034] The X-shaped swirl core 2 includes at least two swirl blades arranged in a cross configuration, with guide and deflection plates bent at both ends of each blade. The X-shaped swirl core 2 is made of stainless steel, possessing corrosion resistance and wear resistance. After the pressurized gas enters the vertical inlet pipe 1, it flows counter-currently through the X-shaped swirl blades, ensuring that the gas generates a high-speed swirling flow before gas-liquid mixing.

[0035] The vertical air inlet pipe 1 has a vertical lumen, which connects to the mixing lumen of the vertical mixing pipe 4 via a vertical neck. The horizontal liquid inlet pipe 3 has a horizontal lumen, which connects to the mixing lumen of the vertical mixing pipe 4 via a horizontal neck. The vertical neck includes a vertical conical neck section and a vertical straight pipe section. The large-diameter portion of the vertical conical neck section connects to the vertical lumen, and the small-diameter portion connects to the vertical straight pipe section. The horizontal neck includes a horizontal conical neck section and a horizontal straight pipe section. The large-diameter portion of the horizontal conical neck section connects to the horizontal lumen, and the small-diameter portion connects to the horizontal straight pipe section.

[0036] The vertical mixing tube 4 has a vertical constriction at its center, forming a gas channel 4a. A liquid channel 4b is formed around the outer periphery of the gas channel 4a, and the liquid channel 4b connects to a horizontal constriction. The swirling gas flows into the gas channel 4a in a clockwise direction, while the liquid swirls into the liquid channel 4b in a counter-clockwise direction. Friction, disturbance, and atomization occur within the vertical mixing tube 4. The significant velocity difference between the gas and liquid phases enhances the atomization effect.

[0037] A collector hood 6 is fixed to the outside of the spray outlet 5d of the casing. The collector hood 6 is a conical shell that gradually expands outward from the casing. Several negative pressure suction ports 6a are formed around the outer peripheral wall of the conical shell. The negative pressure suction ports 6a are trapezoidal. The funnel-shaped collector hood 6 forms a guiding spray hood for gas-liquid mixing. The negative pressure suction ports 6a have the function of guiding and collecting dust. The high-speed sprayed mist field will form a negative pressure field behind it. The surrounding dust-laden airflow enters the collector hood 6 through the negative pressure suction ports 6a. After the dust-laden airflow mixes with the mist field, the probability of dust contact and collision is greatly increased. The dust and mist droplets collide and become wetted, increasing their weight and settling under the action of gravity, which enhances the dust removal effect of the nozzle and improves the dust reduction efficiency.

[0038] The vertical air inlet pipe 1 is connected to the air pressure pump through a gas pipeline; the horizontal liquid inlet pipe 3 is connected to the purifier, filter, and high-pressure pump in sequence through a liquid pipeline.

[0039] Example 2

[0040] Based on Embodiment 1, the difference in this embodiment is:

[0041] A method for operating a mining-use internal and external dual-disturbance self-excited oscillating jet nozzle includes the following steps:

[0042] S1. Turn on the air pump and input airflow into the vertical air inlet pipe 1 through the gas pipeline. The airflow passes through the X-shaped vortex core 2 and rotates clockwise at high speed to enhance the rotation characteristics of the airflow. Then the airflow enters the gas flow channel 4a of the vertical mixing pipe 4 to form a clockwise vortex.

[0043] S2. The high-pressure pump is turned on to deliver high-pressure water through the liquid pipeline. The high-pressure water is filtered and purified before entering the horizontal liquid inlet pipe 3. Then, the high-pressure water flows tangentially into the liquid flow channel 4b of the vertical mixing pipe 4 to form a counterclockwise swirling flow and generate a central low-pressure cavity.

[0044] S3, such as Figure 2 As shown, the clockwise swirling gas comes into contact with and mixes with the counterclockwise swirling high-pressure water. The high-speed friction and collision between the gas and liquid generate turbulent pulsations, which increases the droplet fragmentation and atomization.

[0045] S4, such as Figure 3 As shown, after the gas-liquid swirls, they simultaneously enter the self-excited oscillation chamber 5. The liquid jet exchanges energy and momentum with the air in the self-excited oscillation chamber 5, causing an unstable shear layer 5a to form at the gas-liquid interface. The fluid around the shear layer 5a is entrained to form a vortex 5b. The intervention of the gas jet causes the shear layer 5a to be divided into an inner shear layer and an outer shear layer, forming a double disturbance atomization form, which enhances the cavitation effect of the liquid jet in the self-excited oscillation chamber 5 and strengthens the degree of droplet breakup.

[0046] S5. Finally, jet droplets are ejected from the injection outlet 5d of the shell to form a dust-suppressing fog field.

[0047] In step S4, the liquid jet collides with the concave wall of the vortex space, causing the liquid jet to flow back upstream and induce the vortex ring 5c. At the same time, it causes radial pulsation, which causes the central jet to undergo periodic compression and expansion, forming an oscillating pulse jet and enhancing the turbulent energy between gas and liquid.

[0048] In step S5, the jet droplets form an umbrella-shaped spray constraint pattern after passing through the collecting hood 6. The dust-laden airflow from the outer periphery enters the collecting hood 6 through the negative pressure suction port 6a. The dust-laden airflow mixes with the fog field, causing the dust and droplets to collide, become wetted, and increase in weight, eventually settling under gravity, thus achieving the dust removal effect. The guiding constraint of the jet droplets by the collecting hood 6 helps reduce the ineffective dispersion of droplets and minimizes the impact of airflow disturbance on low-concentration droplets at the periphery of the fog field. The intake of dust-laden airflow through the negative pressure suction port 6a greatly increases the probability of dust contact and collision, improving dust reduction efficiency.

[0049] Table 1 shows a comparison between traditional nozzles and the present invention. Most mining nozzles have unsatisfactory atomization effects, with large atomized particle sizes, making it difficult to meet dust suppression requirements. For example, common swirl nozzles have an average atomized particle size of 110μm-140μm at a spray pressure of 2MPa. The present invention adds an X-shaped swirl core 2 and a gas-liquid swirl channel before the self-excited oscillation chamber, using "dual internal and external disturbances" of gas and liquid to increase vortex volume, thereby generating a continuous jet with smaller droplet size. Furthermore, the nozzle of the present invention has an average atomized particle size of 90μm-110μm at a spray pressure of 2MPa. Regarding droplet morphology, traditional self-excited oscillating radio frequency nozzles have insufficient internal disturbance energy and significant flow losses, resulting in an unsatisfactory effective atomization range. Additionally, the atomization angle of traditional nozzles is easily affected by wind. The nozzle of this invention is designed with an arc surface in its self-excited oscillation chamber, which effectively reduces fluid loss along the flow path. At the same time, the flow collector 6 effectively enhances the concentrating effect of the fog field, making it less susceptible to wind disturbance. The effective range and atomization angle are also increased accordingly. Compared with the dust removal efficiency of spray, the atomization effect of traditional mining nozzles is poor, which leads to a decrease in the collision and coagulation ability of dust and fog droplets, resulting in a reduced dust reduction effect. The on-site dust reduction efficiency is generally less than 50%. However, the nozzle of this invention enhances the atomization effect of the nozzle and also adds a flow collector 6 to reduce the ineffective dispersion of fog droplets. The negative pressure suction port 6a can also further purify the surrounding polluted air and improve the dust reduction efficiency. The on-site dust reduction efficiency can be as high as 70% or more.

[0050] Table 1 Comparison of Traditional Nozzles and Nozzles of the Invention

[0051]

[0052] Compared with existing technologies, the self-excited oscillating jet nozzle and its operation method for mining applications with internal and external dual disturbances have the following advantages:

[0053] 1. The gas-liquid jet exchanges momentum with the air inside the oscillation chamber, generating high-frequency oscillations within the self-excited oscillation chamber. The gas jet is differentiated into inner and outer shear layers, continuously entraining liquid to form vortices, which then impact the walls of the self-excited oscillation chamber, collectively creating a "double disturbance" atomization pattern. This induces the formation of more vortex energy, enhancing the cavitation effect of the nozzle and effectively improving the atomization effect. The self-excited oscillation chamber is designed as a curved cavity, avoiding the formation of secondary vortices at sharp corners and reducing friction loss along the path.

[0054] 2. The negative pressure generated by the shroud purifies the surrounding polluted air and also acts as a fog field beam, increasing the effective range of the fog field.

[0055] 3. This invention has the advantages of small atomized particle size, low energy consumption, stable spray pattern, and easy maintenance. It has a wide range of applications and broad application prospects.

[0056] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

[0057] Although this paper frequently uses terms such as vertical air inlet pipe 1; X-shaped vortex core 2; horizontal liquid inlet pipe 3; vertical mixing pipe 4; gas flow channel 4a; liquid flow channel 4b; self-excited oscillation chamber 5; shear layer 5a; vortex 5b; vortex ring 5c; jet outlet 5d; flow collector 6; negative pressure suction port 6a, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A mining-grade dual-disturbance self-excited oscillation jet nozzle, comprising a shell with an internal self-excited oscillation chamber, characterized in that, One side of the housing has a mixing inlet connected to the self-excited oscillation chamber, and the other side has a jet outlet connected to the self-excited oscillation chamber. A dual-port fitting is connected to the mixing inlet, which includes a vertical air inlet and a horizontal liquid inlet. The vertical air inlet and the horizontal liquid inlet are perpendicularly connected to the vertical mixing pipe. An X-shaped vortex core is installed inside the vertical air inlet. The inlet of the horizontal liquid inlet is arranged along the tangent direction of the flow channel of the vertical air inlet. The self-excited oscillation chamber is a conical cavity. The center of the small diameter end of the conical cavity is connected to the mixing inlet, and the center of the large diameter end of the conical cavity is recessed along the axis to form an indentation. The indentation is connected to the jet outlet. The vertical air inlet pipe has a vertical cavity, which is connected to the mixing cavity of the vertical mixing pipe through a vertical constriction; the horizontal liquid inlet pipe has a horizontal cavity, which is connected to the mixing cavity of the vertical mixing pipe through a horizontal constriction. The center of the vertical mixing tube is connected to the vertical constriction to form a gas flow channel, and the outer periphery of the gas flow channel forms a liquid flow channel. The liquid flow channel is connected to the horizontal constriction. The swirling gas flows into the gas flow channel in a clockwise direction, and the liquid swirls into the liquid flow channel in a counterclockwise direction.

2. The mining-grade dual-disturbance self-excited oscillating jet nozzle as described in claim 1, characterized in that, The self-excited oscillation chamber has a smooth inner wall. The periphery of the small-diameter end of the self-excited oscillation chamber is rounded and chamfered. The periphery of the large-diameter end of the self-excited oscillation chamber is rounded and chamfered. The large-diameter end of the self-excited oscillation chamber and the recessed opening are connected by an arc-shaped surface. A ring-shaped vortex space is formed between the large-diameter end of the self-excited oscillation chamber and the recessed opening.

3. The mining-use internal and external dual-disturbance self-excited oscillating jet nozzle as described in claim 1, characterized in that, The X-shaped swirl core includes at least two swirl blades arranged in a cross configuration, with guide and deflection plates bent at both ends of each blade.

4. The mining-grade dual-disturbance self-excited oscillating jet nozzle as described in claim 1, characterized in that, The housing is fixed with a flow collector shroud outside the jet outlet. The flow collector shroud is a conical shroud that gradually expands outward from the housing. Several negative pressure suction ports are formed around the outer peripheral wall of the conical shroud. The negative pressure suction ports are trapezoidal.

5. The mining-use internal and external dual-disturbance self-excited oscillating jet nozzle as described in claim 1, characterized in that, The vertical air inlet pipe is connected to the air pressure pump via a gas pipeline; the horizontal liquid inlet pipe is connected in sequence to the purifier, filter, and high-pressure pump via a liquid pipeline.

6. A method for operating a mine-use internal and external dual-disturbance self-excited oscillating jet nozzle, characterized in that, Includes the following steps: S1. Turn on the air pump and input airflow into the vertical air inlet pipe through the gas pipeline. The airflow passes through the X-shaped vortex core and rotates clockwise at high speed to enhance the rotation characteristics of the airflow. Then the airflow enters the gas flow channel of the vertical mixing pipe to form a clockwise vortex. S2. The high-pressure pump is turned on to deliver high-pressure water through the liquid pipeline. The high-pressure water is filtered and purified before entering the horizontal liquid inlet pipe. Then, the high-pressure water flows tangentially into the liquid channel of the vertical mixing pipe to form a counterclockwise swirling flow and generate a central low-pressure cavity. S3. The clockwise swirling gas comes into contact with and mixes with the counterclockwise swirling high-pressure water. The high-speed friction and collision between the gas and liquid produce turbulent pulsations, which increases the droplet breakage and atomizes the mist evenly. S4. After the gas-liquid swirls, they simultaneously enter the self-excited oscillation chamber. The liquid jet exchanges energy and momentum with the air in the self-excited oscillation chamber, causing an unstable shear layer to form at the gas-liquid interface. The fluid around the shear layer is entrained to form a vortex. The intervention of the gas jet causes the shear layer to be divided into an inner shear layer and an outer shear layer, forming a double disturbance atomization form, which enhances the cavitation effect of the liquid jet in the self-excited oscillation chamber and strengthens the degree of droplet breakup. S5. Finally, jet droplets are ejected from the spray outlet of the shell to form a dust-suppressing fog field.

7. The operation method of the mine-use internal and external dual-disturbance self-excited oscillating jet nozzle as described in claim 6, characterized in that, In step S4, the liquid jet collides with the concave wall of the vortex space, causing the liquid jet to flow back upstream and induce vortex rings. At the same time, it triggers radial pulsation, causing the central jet to undergo periodic compression and expansion, forming an oscillating pulse jet, which enhances the turbulent energy between gas and liquid.

8. The operation method of the mine-use internal and external dual-disturbance self-excited oscillating jet nozzle as described in claim 6, characterized in that, In step S5, the jet droplets pass through the collecting hood to form an umbrella-shaped spray constraint shape. The dust-laden airflow on the outer periphery enters the collecting hood through the negative pressure suction port. The dust-laden airflow mixes with the fog field, causing the dust and droplets to collide and become wetted, increasing their weight. Under the action of gravity, they settle, achieving the dust removal effect.

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