Combined variable-mixing-state multi-fluid mist spray gun

Abstract

The utility model relates to a combined type variable-mixing-state multi-fluid mist spray gun which comprises a spray gun body, an air cap is installed at one end of the spray gun body, a liquid inlet movable control part is movably installed at the other end of the spray gun body, and a swirl nozzle is arranged in the air cap and connected with one end of a liquid flow guide pipe. The other end of the liquid guide pipe is connected with a liquid inlet movable control part; a water inlet is formed in the liquid inlet movable control part, a swirl vane is mounted in the swirl nozzle, a water outlet is formed in the liquid outlet end of the swirl nozzle, and liquid entering from the water inlet flows through the liquid guide pipe and the swirl vane and then is sprayed out from the water outlet; a gas inlet is formed in the spray gun main body, a gas swirl vane is arranged outside the swirl nozzle, and gas entering from the gas inlet flows through the spray gun main body and the gas swirl vane and then is extruded and jetted out from a crack of the gas outlet hole; according to the utility model, the collision mixing and atomizing positions of gas and liquid can be controlled, so that the spraying form can be adjusted in real time according to actual requirements.

Description

[Technical field]

[0001] The utility model relates to the technical field of nozzle spraying, in particular to a combined variable mixed state multi-fluid fine mist spray gun. [Background Technology]

[0002] Two-fluid water nozzles are important components in the field of industrial applications. They can be used in industries such as steel, electronics, and chemicals for flue gas cooling and spray drying processes. The spray performance and shape of the nozzle determine the performance and cooling effect of the entire product, and are of great significance to factory production emissions and environmental protection.

[0003] At present, the spray guns on the market mainly play an auxiliary role in high-pressure use environments and their own nozzles for high-pressure atomizing gas atomization. Some will adjust the spray angle according to actual use. The performance of the products varies, the liquid flow adjustment is relatively small, and the consumption of compressed air is large. The flow of the spray gun cannot effectively cover all the performance required by the customer, which leads to the need to arrange multiple spray guns to meet the required cooling effect. However, the scattered arrangement cannot effectively complete a large amount of cooling work instantly, and the spray angle is small. When the installation space is limited and multiple spray guns cannot be arranged, the smoke cannot be fully covered. The products and spray objects that need to be cooled do not have complete cooling indicators, which affects the next process or causes some damage to the subsequent machines that are not resistant to high temperatures. This may also lead to secondary cooling, causing unnecessary losses. Existing applications such as cooling require aerosol spray guns to spray particles less than 90μm at low pressure and low gas consumption, and the spray particles need to be uniform and effective. The angle coverage range is large and the optional flow range is large. [Contents of the utility model]

[0004] The purpose of the utility model is to solve the above-mentioned shortcomings and provide a combined variable mixing state multi-fluid fine mist spray gun, so that the collision mixing and atomization position of gas and liquid can be controlled, and then the angle and coverage of the spray can be adjusted to adjust the spray shape in real time according to actual needs.

[0005] In order to achieve the above-mentioned purpose, a combined variable mixed state multi-fluid fine mist spray gun is designed, comprising a spray gun body 2, an air cap 1 is installed at one end of the spray gun body 2, a liquid inlet movable control component 7 is installed at the other end of the spray gun body 2, the liquid inlet movable control component 7 is movably connected to the spray gun body 2 along the axial direction, a swirl nozzle 3 is arranged inside the air cap 1, the swirl nozzle 3 is connected to one end of a liquid guide tube 6, the other end of the liquid guide tube 6 is connected to the liquid inlet movable control component 7, the liquid guide tube 6 is arranged inside the spray gun body 2, the swirl nozzle 3 is translated inward or outward through the liquid inlet movable control component 7; the liquid inlet movable control component 7 is arranged inside the spray gun body 2, and the swirl nozzle 3 is translated inward or outward through the liquid inlet movable control component 7; the liquid inlet movable control component 7 is arranged inside the spray gun body 2, and the liquid inlet movable control component 7 is arranged inside the spray gun body 2. A water inlet 2-1 is provided on the control component 7, and the water inlet 2-1 is connected to the liquid guide tube 6. A swirl blade 5 is installed inside the swirl nozzle 3, and a water outlet 3-1 is provided at the liquid outlet end of the swirl nozzle 3. The liquid entering through the water inlet 2-1 flows through the liquid guide tube 6 and the swirl blade 5 and is sprayed out from the water outlet 3-1; an air inlet 2-2 is provided on the spray gun body 2, and a gas swirl blade 4 is mounted on the outside of the swirl nozzle 3. An air outlet gap 1-1 is provided between the liquid outlet end of the swirl nozzle 3 and the air cap 1, and the gas entering through the air inlet 2-2 flows through the spray gun body 2 and the gas swirl blade 4 and is squeezed and sprayed out from the air outlet gap 1-1.

[0006] Furthermore, the swirl blade 5 is a cylindrical hole structure, and an inclined hole guide groove 5-1 is distributed circumferentially on the rotating blade 5. The inclined hole guide groove 5-1 is a cylindrical guide groove with an inclined angle. The inclined hole guide groove 5-1 is evenly distributed around 360°, and the inclined hole guide groove 5-1 forms an angle of 20-70° with the horizontal line.

[0007] Furthermore, the gas swirl blade 4 is a cylindrical hole structure, and an inclined hole guide groove 4-1 is distributed circumferentially on the gas swirl blade 4. The inclined hole guide groove 4-1 is a cylindrical guide groove with an inclined angle. The inclined hole guide groove 4-1 is evenly distributed around 360°, and the inclined hole guide groove 4-1 forms an angle of 20-70° with the horizontal line.

[0008] Furthermore, the water outlet 3 - 1 is trumpet-shaped, and the outlet end of the water outlet 3 - 1 is provided with an expansion angle, which is 20-120°.

[0009] Furthermore, the outer surface of the movable liquid inlet control component 7 is provided with an external thread, and is connected to the spray gun body 2 through the thread. When the movable liquid inlet control component 7 rotates clockwise or counterclockwise, it drives the liquid guide tube 6 and the swirl nozzle 3 to move forward and backward along the axial direction.

[0010] Furthermore, the air cap 1 is installed on the top of the spray gun body 2 through threads, and the swirl nozzle 3, the liquid guide tube 6, and the liquid inlet movable control component 7 are sequentially connected as a whole through threads.

[0011] Furthermore, the air inlet 2-2 is connected to the spray gun body 2 through a 90° elbow angle, and the water inlet 2-1 and the air inlet 2-2 are on the same axis.

[0012] Furthermore, the air outlet gap 1 - 1 is formed by the inclined surface of the inner front part of the air cap 1 and the outer wall of the swirl nozzle 3 , and the air outlet gap 1 - 1 gradually narrows from the back to the front.

[0013] Furthermore, the liquid inlet movable control component 7, the air inlet 2-2 and the client pipeline are connected by threaded connection, welding connection or flange connection.

[0014] Furthermore, the swirl nozzle 3 is translated inwardly through the movable liquid inlet control component 7 to the point where the end face of the water outlet 3-1 is inside and the end face of the air outlet gap 1-1 is outside, so as to present an internal gas-liquid mixing state; the swirl nozzle 3 is translated outwardly through the movable liquid inlet control component 7 to the point where the end face of the water outlet 3-1 is outside and the end face of the air outlet gap 1-1 is inside, so as to present an external gas-liquid mixing state.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] (1) The liquid inlet control component of the utility model is connected to the main body component of the spray gun through a thread, and can control the forward and backward displacement of the guide tube component and the swirl nozzle in the axial direction through clockwise and counterclockwise rotation, so that the collision and mixing of gas and liquid and the atomization position can be controlled, and then the spray angle and coverage can be adjusted to adjust the spray shape in real time according to actual needs.

[0017] (2) The utility model uses multiple cylindrical inclined grooves to allow the liquid to contact the inclined slits in a smaller volume to obtain a greater rotational force, thereby obtaining a greater axial and downward force in the rotating chamber to squeeze and break the liquid to obtain a uniformly distributed and dense fine spray form.

[0018] (3) The utility model improves the flow rate and rotation force of liquid and gas through the multiple extrusion and rotation channels inside the nozzle, thereby reducing the required gas volume and maintaining a fine and uniform spray shape under low liquid pressure.

[0019] (4) The utility model uses the collision of gas and liquid to cause a small, dense and large-angle hollow cone spray and a high-speed rotating cone gas vortex to collide and atomize and mix, thereby better breaking up the liquid. In addition, the faster-flowing gas has better striking power and penetration after mixing with the liquid, and the spray distance is also longer. [Drawings]

[0020] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the swirl nozzle and the gas swirl blade of the utility model;

[0023] Figure 4 It is a cross-sectional view of the gas swirl blade of the utility model;

[0024] Figure 5 It is a cross-sectional view of the swirl blade of the utility model;

[0025] In the figure: 1, air cap 1-1, air outlet gap 2, spray gun body 2-1, water inlet 2-2, air inlet 2-3, adjustable threaded component 3, swirl nozzle 3-1, water outlet 4, gas swirl blade 4-1, inclined hole guide groove 2 5, swirl blade 5-1, inclined hole guide groove 1 6, liquid guide tube 7, liquid inlet movable control component. [Specific implementation method]

[0026] As shown in the accompanying drawings, the utility model provides a combined variable mixing state multi-fluid fine mist spray gun, including a spray gun body 2, an air cap 1 is installed at one end of the spray gun body 2, and a liquid inlet movable control component 7 is installed at the other end of the spray gun body 2. The liquid inlet movable control component 7 is movably connected to the spray gun body 2 along the axial direction. A swirl nozzle 3 is arranged inside the air cap 1, and the swirl nozzle 3 is connected to one end of a liquid guide tube 6. The other end of the liquid guide tube 6 is connected to the liquid inlet movable control component 7. The liquid guide tube 6 is arranged inside the spray gun body 2. The swirl nozzle 3 is translated inward or outward through the liquid inlet movable control component 7; the liquid inlet movable control component 7 is connected to the liquid inlet movable control component 7. A water inlet 2-1 is provided on the control component 7, and the water inlet 2-1 is connected to the liquid guide tube 6. A swirl blade 5 is installed inside the swirl nozzle 3, and a water outlet 3-1 is provided at the liquid outlet end of the swirl nozzle 3. The liquid entering through the water inlet 2-1 flows through the liquid guide tube 6 and the swirl blade 5 and is sprayed out from the water outlet 3-1; an air inlet 2-2 is provided on the spray gun body 2, and a gas swirl blade 4 is mounted on the outside of the swirl nozzle 3. An air outlet gap 1-1 is provided between the liquid outlet end of the swirl nozzle 3 and the air cap 1. The gas entering through the air inlet 2-2 flows through the spray gun body 2 and the gas swirl blade 4 and is squeezed and sprayed out from the air outlet gap 1-1.

[0027] Among them, the swirl blade 5 is a cylindrical hole structure, and the rotating blade 5 is circumferentially distributed with an inclined hole guide groove 1 5-1, which is a cylindrical guide groove with an inclined angle, and the inclined hole guide groove 1 5-1 is evenly distributed around 360°, and the inclined hole guide groove 1 5-1 is at an angle of 20-70° with the horizontal line; the gas swirl blade 4 is a cylindrical hole structure, and the gas swirl blade 4 is circumferentially distributed with an inclined hole guide groove 2 4-1, which is a cylindrical guide groove with an inclined angle, and the inclined hole guide groove 2 4-1 is evenly distributed around 360°, and the inclined hole guide groove 2 4-1 is at an angle of 20-70° with the horizontal line. The water outlet 3-1 is trumpet-shaped, and the outlet end of the water outlet 3-1 is provided with an expansion angle, and the expansion angle is 20-120°.

[0028] The outer surface of the movable liquid inlet control component 7 is provided with an external thread, and is connected to the spray gun body 2 through the thread. The movable liquid inlet control component 7 drives the liquid guide tube 6 and the swirl nozzle 3 to move forward and backward along the axial direction after rotating clockwise or counterclockwise; the air cap 1 is installed on the top of the spray gun body 2 through the thread, and the swirl nozzle 3, the liquid guide tube 6, and the movable liquid inlet control component 7 are connected as a whole through the thread in sequence. The air inlet 2-2 is connected to the spray gun body 2 through a 90° elbow angle, and the water inlet 2-1 and the air inlet 2-2 are on the same axis. The air outlet gap 1-1 is composed of the inclined surface of the inner front of the air cap 1 and the outer wall of the swirl nozzle 3, and the air outlet gap 1-1 gradually narrows from back to front.

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0030] The utility model comprises an air cap, a spray gun body, a movable liquid inlet control component and a water inlet, and the four components are connected into one. A swirl nozzle and a gas swirl blade are arranged inside the air cap, a swirl blade is arranged inside the swirl nozzle, and a surrounding inclined hole guide groove is arranged on the periphery of the swirl blade. The air cap is connected to the guide pipe inside and connected to the spray gun body outside. The other end of the spray gun body is connected to the movable liquid inlet control component, and the movable liquid inlet control component is connected to the guide pipe. The air inlet is connected to the spray gun body component at a 90° angle. When the spray gun is in working state, the liquid in the liquid path enters from the water inlet, flows through the guide pipe component, enters the swirl blade and moves toward the liquid outlet. The liquid can change its angle through the swirl nozzle outlet. The gas in the gas path enters from the air inlet, flows through the spray gun body, and forms a high-speed swirl after entering the gas swirl blade. The gas continues to move to the outlet end through the guide of the cavity, and is finally squeezed and sprayed out from the gap of the air outlet. The liquid and gas converge together to form a gas-liquid mixture. By adjusting the liquid inlet control component, the swirl nozzle can be moved inward or outward. When the liquid outlet end face is inside and the outlet hole slit end face is outside, it presents an internal gas-liquid mixing state. When the liquid outlet end face is outside and the outlet hole slit end face is inside, it presents an external gas-liquid mixing state.

[0031] The liquid swirl blade is a cylindrical hole structure, and there are 3-9 oblique holes around the rotating blade, which are evenly distributed around 360°, and the oblique holes around the horizontal line are at an angle of 20-70°. The number n1 is not limited, and preferably n1>6. It can be calculated according to the required flow rate and spray particle size through the required fluid rotation force, axial force and centrifugal force. The gas swirl blade is a cylindrical hole structure, and there are 6-12 oblique holes around the rotating blade, which are evenly distributed around 360°, and the oblique holes around the horizontal line are at an angle of 20-70°. The number is also not limited, and preferably n2>8. It can be calculated according to the required flow rate and spray particle size through the required fluid rotation force, axial force and centrifugal force. The liquid outlet is trumpet-shaped, and the outlet end of the liquid outlet is provided with an expansion angle of 20-120°. The liquid inlet control component is connected to the main part of the spray gun through a thread. The control component, the guide pipe component, and the swirl nozzle can be moved forward and backward in the axial direction by clockwise and counterclockwise rotation. The air inlet control component is connected to the main part of the spray gun by a 90° elbow, and the liquid inlet and the air inlet are on the same axis. The connection method between the liquid inlet control component, the air inlet control component and the client pipeline is not limited to threaded connection, welding connection or flange connection.

[0032] The inclined plane gap is the gap width produced by the nozzle and the air cap after they are matched. The angle of the gap can be adjusted according to the real-time needs. The width and structure of the inclined plane gap can be changed by twisting the threaded matching distance of the movable component back and forth to control the spacing and matching relationship between the nozzle and the air cap. If the nozzle is positioned lower than the end face of the air cap, the gas and liquid will collide, mix and atomize inside before being ejected, so that the angle and coverage of the spray can be adjusted to adjust the spray form in real time according to actual needs. There is also a nozzle position parallel to the end face of the air cap as shown in the figure (and the nozzle position cannot be higher than the air cap), so that the gas and liquid will collide, mix and atomize outside the ejection outlet. The collision space will be larger without excess flow rate and force loss, and a larger spray coverage can be obtained with small spray particles (<09μm). The inclined gap further squeezes the gas to increase the gas flow rate, so that the gas is ejected in a rotating and high-speed state, and collides and atomizes with the hollow cone spray with small, dense particles and a large angle thrown out from the nozzle outside the nozzle. The mixing is better to break up the liquid, and the faster-flowing gas has better impact and penetration after mixing with the liquid, and the spray distance is also farther, finally obtaining the required fine and dense aerosol spray form.

[0033] The purpose of the utility model is to improve the spray angle of the spray gun under the condition of low pressure liquid supply and low gas consumption (some adjustments can be made to the mixing chamber according to the situation) and ensure that the spray droplets are small, so that the spray provides a targeted spray form in cooling and drying. Through the two rotors of the inner and outer tubes and the relative positions of the air outlet and the nozzle, the liquid and the gas rotate in the two pipes respectively. The liquid is divided into smaller volumes in the multiple cylindrical guide grooves with inclined angles inside the nozzle and obtains a larger rotational force through the inclined angle and the extrusion and inclined angle. Then, it enters the rotating chamber with a larger horizontal and gravity axial force, centrifugal force and vertical downward force. After the rotation collision and crushing, the nozzle has a greater force to throw out after the water outlet is ejected. The particles collide twice in the air and may achieve a smaller and denser spray coverage and a larger spray angle. After that, it collides and mixes with the gas in the outer tube that also has a large rotational force through multiple inclined holes to finally obtain small particles, a spray form with a certain angle (>90°), and the spray coverage is fine, dense and uniform. Because this technology has high penetration and spray particles less than 90μm at low pressure and low gas consumption, and the spray coverage angle is large and uniform, and the optional flow range is large, the spray can better and more comprehensively contact the heat source, thereby playing a cooling role. In addition, this technology can also ensure the uniformity and particle size of the spray, and solve the problem more quickly and reduce losses to meet the needs of users and owners.

[0034] The air cap, the main body, the inner tube, and the nozzle are installed on the top of the main body through threads. After the inner tube, the nozzle, and the movable component are connected to each other through threads, they are connected to the rear end of the main body through straight threads and use multiple O-rings for sealing. The distance between the nozzle and the air cap can be controlled by twisting the movable component thread matching distance. The inclined gap, through the combination of the nozzle and the air cap, can produce a gap width of some angles according to real-time needs (it can also adjust the relative mixing position of liquid and gas).

[0035] To be more specific, the two fluids enter the spray gun from two different inlets. The liquid enters the spray gun through the water inlet at the rear end of the main body. The inner tube, nozzle, and movable components also form an internal fluid channel. The liquid enters the inner tube liquid flow channel through the water inlet to initially stabilize the flow and even the liquid's own flow rate. The liquid enters the nozzle through the inner tube. The nozzle is equipped with a rotor, which is press-fitted into the main body. There are multiple cylindrical guide grooves with inclined angles on the rotor (n>6, which can be calculated according to the required flow rate and spray particle size, and the required fluid rotation force, axial force, and centrifugal force). When the liquid is squeezed through multiple cylindrical guide grooves with inclined angles and the inclined angle to obtain a greater rotation force, it then enters the rotating chamber with a larger horizontal and gravitational axial force, centrifugal force, and vertical downward force. After the rotation collision and crushing, it is thrown out from the nozzle to achieve a smaller and denser spray coverage and a larger spray angle.

[0036] The inner tube, nozzle, and movable components also form a gas pipeline of inner and outer tubes with the main body, and fill the entire cavity to evenly disperse and rectify the gas to avoid the possibility of gas shortage during subsequent use. The gas enters the gas pipeline through the gas inlet. The nozzle is equipped with a rotary vane, which is press-fitted outside the main body. The rotary vane is provided with multiple cylindrical guide grooves with inclined angles (n>8, which can be calculated based on the required gas flow and rotational force, and the required fluid rotational force, axial force and centrifugal force). When the gas is squeezed through multiple cylindrical guide grooves with inclined angles and the inclined angle, a greater rotational force is obtained.

[0037] After passing through the rotary vane, the gas is squeezed and rotated, and then passes through the above-mentioned inclined slit (the slit width can be adjusted at some angles according to real-time needs through the cooperation of the nozzle and the air cap) to further squeeze the gas to increase the flow rate of the gas, so that the gas is sprayed out in a rotating and high-speed state, and collides and atomizes with the small, dense and large-angle hollow cone spray thrown out from the nozzle outside the nozzle to better break up the liquid. The gas with a faster flow rate has better impact and penetration after mixing with the liquid, and the spray distance is also farther, finally obtaining the required fine and dense aerosol spray form.

[0038] Through the inclined gap, the distance between the nozzle and the air cap can be controlled by twisting the threaded fitting distance of the movable component back and forth to change its width and structure. For example, the nozzle can be positioned lower than the end face of the air cap, so that the gas and liquid will collide, mix and atomize inside before being ejected, thereby reducing the spray angle and coverage to adjust the spray pattern in real time according to actual needs.

[0039] The utility model can meet the required coverage range height and shape by adjusting the relative position of the nozzle and the different mixing chambers formed with the air cap, so as to achieve dense distribution of spray particles, small spray particles (<90μm) and high-speed penetrating droplets, so as to more effectively exchange heat and cool down. The utility model has a larger liquid flow range coverage option and lower gas volume and pressure requirements. It ensures spray uniformity and high-speed collision and fragmentation through multiple slits and guide chute extrusion rectification and the increase of the rotational force of the two fluids (liquid and gas) to obtain smaller droplet particle size, and solve the problem more quickly to reduce losses.

[0040] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used can be purchased from the market, and special-shaped parts can be customized according to the records in the specification and drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0041] The present invention is not limited to the above-mentioned implementation modes, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be considered as equivalent replacement modes and shall be included in the protection scope of the present invention.

Claims

1. A combined variable mixed state multi-fluid fine mist spray gun, comprising a spray gun body (2), characterized in that: An air cap (1) is installed at one end of the spray gun body (2), and a movable liquid inlet control component (7) is installed at the other end of the spray gun body (2). The movable liquid inlet control component (7) is movably connected to the spray gun body (2) along the axial direction. A swirl nozzle (3) is arranged inside the air cap (1). The swirl nozzle (3) is connected to one end of a liquid guide tube (6). The other end of the liquid guide tube (6) is connected to the movable liquid inlet control component (7). The liquid guide tube (6) is arranged inside the spray gun body (2). The swirl nozzle (3) is translated inward or outward through the movable liquid inlet control component (7); a water inlet (2-1) is opened on the movable liquid inlet control component (7). (2-1) is connected to a liquid guide tube (6), a swirl blade (5) is installed inside the swirl nozzle (3), a water outlet (3-1) is arranged at the liquid outlet end of the swirl nozzle (3), and the liquid entering through the water inlet (2-1) flows through the liquid guide tube (6) and the swirl blade (5) and is sprayed out from the water outlet (3-1); an air inlet (2-2) is arranged on the spray gun body (2), a gas swirl blade (4) is mounted outside the swirl nozzle (3), and an air outlet gap (1-1) is arranged between the liquid outlet end of the swirl nozzle (3) and the air cap (1), and the gas entering through the air inlet (2-2) flows through the spray gun body (2) and the gas swirl blade (4) and is squeezed and sprayed out from the air outlet gap (1-1).

2. The combined variable mixed state multi-fluid fine mist spray gun according to claim 1, characterized in that: The swirl blade (5) is a cylindrical hole structure, and an inclined hole guide groove (5-1) is distributed along the circumferential direction on the swirl blade (5). The inclined hole guide groove (5-1) is a cylindrical guide groove with an inclined angle. The inclined hole guide groove (5-1) is evenly distributed around 360°, and the inclined hole guide groove (5-1) forms an angle of 20-70° with the horizontal line.

3. The combined variable mixed state multi-fluid fine mist spray gun according to claim 1, characterized in that: The gas swirl blade (4) is a cylindrical hole structure, and an inclined hole guide groove (4-1) is distributed along the circumference of the gas swirl blade (4). The inclined hole guide groove (4-1) is a cylindrical guide groove with an inclined angle. The inclined hole guide groove (4-1) is evenly distributed around 360°, and the inclined hole guide groove (4-1) forms an angle of 20-70° with the horizontal line.

4. The combined variable mixed state multi-fluid fine mist spray gun according to claim 1, characterized in that: The water outlet (3-1) is trumpet-shaped, and the outlet end of the water outlet (3-1) is provided with an expansion angle, which is 20-120°.

5. The combined variable mixed state multi-fluid fine mist spray gun according to claim 1, characterized in that: The outer surface of the movable liquid inlet control component (7) is provided with an external thread and is connected to the spray gun body (2) via the thread. When the movable liquid inlet control component (7) rotates clockwise or counterclockwise, it drives the liquid guide tube (6) and the swirl nozzle (3) to move forward and backward along the axial direction.

6. The combined variable mixed state multi-fluid fine mist spray gun according to claim 1, characterized in that: The air cap (1) is installed on the top of the spray gun body (2) through threads, and the swirl nozzle (3), the liquid guide tube (6), and the movable liquid inlet control component (7) are sequentially connected as a whole through threads.

7. The combined variable mixed state multi-fluid fine mist spray gun according to claim 1, characterized in that: The air inlet (2-2) is connected to the spray gun body (2) via a 90° elbow angle, and the water inlet (2-1) and the air inlet (2-2) are located on the same axis.

8. The combined variable mixed state multi-fluid fine mist spray gun according to claim 1, characterized in that: The air outlet slit (1-1) is formed by the inclined surface of the inner front part of the air cap (1) and the outer wall of the swirl nozzle (3), and the air outlet slit (1-1) gradually narrows from the back to the front.

9. The combined variable mixed state multi-fluid fine mist spray gun according to claim 1, characterized in that: The movable liquid inlet control component (7), the air inlet (2-2) and the client pipeline are connected by threaded connection, welding connection or flange connection.

10. The combined variable mixed state multi-fluid fine mist spray gun according to any one of claims 1 to 9, characterized in that: The swirl nozzle (3) is translated inwardly through the movable liquid inlet control component (7) to a point where the end face of the water outlet (3-1) is inside and the end face of the air outlet slit (1-1) is outside, so as to present an internal gas-liquid mixing state; the swirl nozzle (3) is translated outwardly through the movable liquid inlet control component (7) to a point where the end face of the water outlet (3-1) is outside and the end face of the air outlet slit (1-1) is inside, so as to present an external gas-liquid mixing state.

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