Atomizing spray gun

Abstract

The invention provides an atomizing spray gun, and relates to the technical field of spraying equipment, the atomizing spray gun specifically comprises a gun body and a spray head assembly, a gas channel and a fluid channel used for conveying high-pressure gas and fluid are formed in the gun body, and the gas outlet end of the gas channel faces a nozzle and communicates with the nozzle to convey the high-pressure gas to the nozzle; as the sum of the cross sectional areas of the diversion ports at the nozzle is smaller than the cross sectional area of the nozzle, high-pressure gas generates a Venturi effect due to the Bernoulli principle when passing through the diversion ports, the suction force to fluid discharged from the side is enhanced, and therefore the fluid in the fluid channel is sucked into the nozzle and flows to the nozzle to be mixed with the high-pressure gas, and the high-pressure gas is discharged from the nozzle. According to the invention, the Venturi effect is generated through the plurality of flow dividing ports, the suction stability of the fluid is enhanced, and when the high-viscosity liquid is used as the fluid, the high-viscosity liquid flows through the flow dividing ports and then flows through the flow dividing ports together, so that the flow dividing and guiding of the mixture are realized, uniform tiny bubbles are formed, and the atomization spraying in a controllable range is realized. The consistency of the atomization effect can be guaranteed, and the atomization efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying equipment, and more specifically, to an atomizing spray gun. Background Art

[0002] A high-viscosity spray gun is a device specifically used for spraying high-viscosity liquids or slurries, and is widely used in fields such as coatings, adhesives, sealants, food, medicine, and chemicals. Due to the poor fluidity of high-viscosity liquids, traditional spraying equipment often has difficulty achieving uniform and stable spraying effects. Therefore, the design and manufacture of high-viscosity spray guns have relatively high technical thresholds.

[0003] A pneumatic high-viscosity spray gun is a device that uses compressed air as a power source to atomize high-viscosity liquids and spray them onto the target surface. Due to its simple structure, convenient operation, and wide application range, pneumatic spray guns have been widely used in fields such as coatings, adhesives, sealants, food, and medicine.

[0004] However, due to the poor fluidity of high-viscosity liquids, traditional pneumatic spray guns have poor atomization effects and low spraying efficiency during the spraying process. Summary of the Invention

[0005] The purpose of the present invention is to provide an atomizing spray gun to alleviate the technical problems in the prior art that traditional pneumatic spray guns have poor atomization effects and low spraying efficiency during the spraying process, and are prone to blockage due to the deposition of high-viscosity liquids after use.

[0006] The present invention provides an atomizing spray gun, which includes a gun body and a nozzle assembly; the gun body has a gas passage, a fluid passage, and a nozzle. The gas passage is used to connect and convey high-pressure gas, the fluid passage is used to connect and convey fluid, the outlet end of the gas passage faces the nozzle and is connected to the nozzle, and the fluid passage is connected to the nozzle from one side of the gas passage; the nozzle assembly includes a nozzle and a flow divider. The nozzle is detachably connected to the nozzle, the flow divider is arranged in the nozzle, the flow divider forms a plurality of flow dividing openings in the nozzle, the sum of the cross-sectional areas of the plurality of flow dividing openings is smaller than the cross-sectional area of the nozzle, and the discharge directions of the plurality of flow dividing openings are the same.

[0007] Further, the atomizing spray gun further includes: an intake compression member;

[0008] The intake compression member is detachably connected to the gun body, and an acceleration passage communicating with the gas passage is provided in the intake compression member. The acceleration passage has a tapered structure from the intake end to the outlet end.

[0009] Further, the atomizing spray gun further includes an air connector; one end of the air connector is used to connect to a compressed air source, and the other end is threadedly connected to the air inlet end of the air inlet compression member.

[0010] Further, the fluid passage has a fixed inner diameter.

[0011] Further, the atomizing spray gun further includes a fluid adapter; the fluid adapter has an input passage, one end of the fluid adapter is an access end for accessing fluid, and the other end is an outlet end communicating with the fluid passage, and the input passage tapers from the access end to the outlet end.

[0012] Further, the atomizing spray gun further includes a fluid connector; one end of the fluid connector is used to connect to a fluid pumping device, and the other end is threadedly connected to the access end of the fluid adapter.

[0013] Further, the shunt member includes a shunt portion; one end of the shunt portion close to the nozzle is a shunt end, one ends of a plurality of the shunt portions are joined together, and the other ends are arranged at intervals along the circumference of the nozzle to form the shunt orifice.

[0014] Further, the longitudinal section of the shunt portion has a structure that is thin at both the upper and lower ends and thick in the middle; the two side surfaces of the shunt portion are two curved surfaces with different curvatures.

[0015] Further, the inner wall of the nozzle is smooth; there are three shunt portions, one ends of the three shunt portions are connected to each other, and the other ends are arranged at intervals and evenly along the circumference of the nozzle and are connected to the inner wall of the nozzle.

[0016] Further, the gun body is an integrally formed structure.

[0017] Advantageous effects:

[0018] In the atomizing spray gun provided by the present invention, a gas passage and a fluid passage for transporting high-pressure gas and fluid are formed in the gun body. The gas outlet end of the gas passage faces the nozzle and communicates with the nozzle to transport high-pressure gas to the nozzle. Since the sum of the cross-sectional areas of the shunt orifices at the nozzle is smaller than the cross-sectional area of the nozzle, the high-pressure gas generates a Venturi effect due to the Bernoulli principle when passing through the shunt orifice, enhancing the suction force on the fluid discharged from the side, thereby sucking the fluid in the fluid passage into the nozzle. The fluid flows to the nozzle and mixes with the high-pressure gas, and then flows through the shunt orifice together, realizing the shunting and guiding of the mixture, forming uniform microbubbles, and realizing atomizing spraying within a controllable range. The present invention generates a Venturi effect through multiple shunt orifices, enhancing the stability of fluid suction. When using a high-viscosity liquid as the fluid, it can ensure the consistency of the atomizing effect and improve the atomizing efficiency. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Structural schematic diagram of the atomizing spray gun provided by the embodiment of the present invention;

[0021] Figure 2 is Figure 1 perspective structural schematic diagram of;

[0022] Figure 3 Split structural schematic diagram of the atomizing spray gun provided by the embodiment of the present invention;

[0023] Figure 4 Structural schematic diagram at the nozzle of the atomizing spray gun provided by the embodiment of the present invention;

[0024] Figure 5 Structural schematic diagram at the spray orifice of the atomizing spray gun provided by the embodiment of the present invention;

[0025] Figure 6 Structural schematic diagram of the flow splitter of the atomizing spray gun provided by the embodiment of the present invention;

[0026] Figure 7 Schematic diagram of the flow splitting direction of the flow splitting part in the atomizing spray gun provided by the embodiment of the present invention.

[0027] Icon:

[0028] 100 - gun body; 110 - fluid channel; 120 - spray orifice; 200 - nozzle assembly; 210 - nozzle; 220 - flow splitter; 300 - intake compression part; 310 - acceleration channel; 400 - air connector; 500 - fluid adapter; 510 - input channel; 600 - fluid connector. Specific embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0030] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0033] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0036] Refer to Figures 1 to 5 , the atomizing spray gun provided in this embodiment includes a gun body 100 and a nozzle assembly 200.

[0037] Among them, the gun body 100 has a gas channel, a fluid channel 110, and a nozzle 120. The gas channel is used to connect and convey high-pressure gas, and the fluid channel 110 is used to connect and convey fluid. The outlet end of the gas channel faces the nozzle 120 and is connected to the nozzle 120. The fluid channel 110 is connected to the nozzle 120 from one side of the gas channel.

[0038] In this embodiment, the nozzle assembly 200 includes a nozzle 210 and a flow divider 220. The nozzle 210 is detachably connected to the nozzle 120. The flow divider 220 is arranged in the nozzle 120. The flow divider 220 forms a plurality of flow diversion ports in the nozzle 120. The sum of the cross-sectional areas of the plurality of flow diversion ports is smaller than the cross-sectional area of the nozzle 120, and the discharge directions of the plurality of flow diversion ports are the same.

[0039] Specifically, in this embodiment, a gas channel and a fluid channel 110 for conveying high-pressure gas and fluid are formed in the gun body 100. The gas channel and the fluid channel 110 have better sealing performance and can reduce the overall volume of the gun body 100.

[0040] The outlet end of the gas channel faces the nozzle 120 and is connected to the nozzle 120. In this structure, when high-pressure gas is conveyed to the nozzle 120 through the gas channel, the gas can be directly discharged into the gas channel, avoiding the reduction of the flow rate caused by the bending of the channel structure during the gas flow.

[0041] In this embodiment, the sum of the cross-sectional areas of the flow diversion ports at the nozzle 120 is smaller than the cross-sectional area of the nozzle 120. When the high-pressure gas passes through the flow diversion ports, the Venturi effect is generated due to the Bernoulli principle, forming a local vacuum at the nozzle 120, thereby enhancing the suction force on the fluid discharged from the side to suck the fluid in the fluid channel 110 into the nozzle 120. The fluid flows to the nozzle 120 and mixes with the high-pressure gas. After forming a mixture, it flows through the flow diversion ports together. The plurality of flow diversion ports realize the diversion and guiding of the mixture, forming uniform microbubbles, and realizing atomized spraying within a controllable range.

[0042] The atomizing spray gun provided in this embodiment generates the Venturi effect through a plurality of flow diversion ports, enhancing the stability of fluid inhalation. When using a high-viscosity liquid as the fluid, it can ensure the consistency of the atomization effect and improve the atomization efficiency.

[0043] In this embodiment, the atomizing spray gun further includes an intake compression member 300. The intake compression member 300 is detachably connected to the gun body 100. An acceleration channel 310 communicated with the gas channel is arranged in the intake compression member 300. The acceleration channel 310 is a tapered structure from the intake end to the outlet end.

[0044] After the high-pressure gas enters the tapered acceleration channel 310, it can form an accelerating flow before entering the gas channel of the gun body 100, further increasing the flow rate of the high-pressure gas and enabling the high-pressure gas to form a high-speed air flow with a higher speed at the nozzle 120.

[0045] When the high-speed air flow passes through the shunt port, it can generate a stronger Venturi effect, which not only enhances the siphon force on the fluid channel 110, making it easier for the high-viscosity fluid to be sucked into the mixing chamber, but also enhances the shear mixing effect of the high-pressure gas and the fluid. Thus, while further improving the atomization uniformity, the consumption of compressed gas is reduced.

[0046] In this embodiment, the atomizing spray gun further includes an air connector 400. One end of the air connector 400 is used to connect to a compressed air source, and the other end is threadedly fitted and connected to the intake end of the intake compressor 300.

[0047] Specifically, in this embodiment, the quick airtight assembly of the air connector 400 and the intake compressor 300 is realized through a threaded connection structure, which is very convenient to disassemble, and can form an axial self-locking effect while ensuring the sealing performance of the interface, avoiding radial vibration displacement of the air connector 400 and the intake compressor 300 during the high-pressure gas transmission process.

[0048] In this embodiment, the fluid channel 110 has a fixed inner diameter.

[0049] Among them, the fluid channel 110 with a fixed inner diameter can avoid the disturbance of fluid acceleration or deceleration caused by the variable diameter structure, thereby ensuring the precise control of the fluid flow rate.

[0050] In this embodiment, the atomizing spray gun further includes a fluid adapter 500. The fluid adapter 500 has an input channel 510. One end of the fluid adapter 500 is the access end for accessing the fluid, and the other end is the outflow end communicating with the fluid channel 110. The input channel 510 tapers from the access end to the outflow end.

[0051] The fluid enters the tapered input channel 510 of the fluid adapter 500 from the access end. Under the tapered structure, the flow rate of the fluid is increased, so that laminar pre-acceleration is completed before the fluid enters the fluid channel 110 with a fixed inner diameter, increasing the flow rate of the high-viscosity fluid and thus destroying the shear thickening characteristic of the high-viscosity fluid.

[0052] Moreover, after the flow rate of the fluid is increased, the subsequent two-phase mixing efficiency of the high-pressure gas and the fluid can be significantly improved and the mixing of the high-pressure gas and the fluid can be made more uniform.

[0053] In this embodiment, the atomizing spray gun further includes a fluid connector 600. One end of the fluid connector 600 is used to connect with a fluid pumping device, and the other end is threadedly engaged with the access end of the fluid adapter 500.

[0054] Similar to the air connector 400, both ends of the fluid connector 600 in this embodiment are connected to the fluid pumping device and the access end of the fluid adapter 500 in a threaded engagement manner. It is very convenient to disassemble, and at the same time, it can form an axial self-locking effect while ensuring the sealing performance of the connection, avoiding radial vibration displacement at the connection during the transportation of high-viscosity fluids.

[0055] It should be noted that in this embodiment, the flow rate of the transported fluid is controlled by the fluid channel 110 with a fixed inner diameter in combination with the fluid pumping device. The fluid transportation is more stable, and the consistency of each spraying or foaming can be stably controlled, improving the product quality, thereby avoiding problems such as uneven spraying or insufficient foaming caused by fluctuations in the flow rate.

[0056] In this embodiment, the diverter 220 includes a diverting portion. One end of the diverting portion close to the nozzle 120 is the diverting end, and one ends of multiple diverting portions are connected, and the other ends are arranged at intervals along the circumference of the nozzle 120 to form a diverting port.

[0057] After one ends of multiple diverting portions are connected, a star-shaped diffused flow channel structure is formed at the nozzle 120. Under this structure, a multi-directional vector shear effect is generated at the diverting port when the mixed flow of high-pressure gas and fluid passes through. The connected ends of multiple diverting portions form the anchor points of the central eddy current. Since the discharging directions of multiple diverting portions are the same, a spiral jet discharge is generated when the mixed fluid flows out from the diverting port.

[0058] In this embodiment, the longitudinal section of the diverting portion has a structure that is narrow at both the upper and lower ends and thick in the middle. The two side surfaces of the diverting portion are two curved surfaces with different curvatures.

[0059] Among them, the curvatures of the two side surfaces of the diverting portion in this embodiment are different. When the mixture flows in from the upper end of the diverting portion, the mixture is divided by the upper end of the diverting portion, and the flow velocities of the mixture flowing to both sides of the diverting portion are different, thereby dispersing the mixture and making the mixing of high-pressure gas and fluid more sufficient.

[0060] And, combined with Figure 7 , since the upper and lower ends of the diverting portion are narrow and the middle is thick, when the mixed flow passes through, a differential pressure gradient field can be formed upstream and downstream of the diverting port. Among them, a local high-pressure recovery area is formed at the thick position in the middle of the diverting portion, enabling the fluid to complete the momentum conversion from the longitudinal velocity component to the transverse component at the entrance of the diverting port.

[0061] The asymmetric curved surfaces on both sides of the flow splitting part form an expanding - contracting - expanding flow channel in the flow splitting port. After the mixture passes through the multiple flow splitting ports formed by the multiple flow splitting parts, the mixture is more evenly dispersed, the mixing of the high - pressure gas and the fluid is more sufficient, the atomization efficiency can be further improved, the atomization effect is more delicate, the bubble distribution is uniform, thereby improving the quality of spraying or foaming and reducing material waste.

[0062] Among them, in this embodiment, the inner wall of the nozzle 120 is smooth. There are three flow splitting parts, one ends of the three flow splitting parts are connected to each other, and the other ends are arranged at intervals and evenly along the circumferential direction of the nozzle 120 and are connected to the inner wall of the nozzle 120.

[0063] Specifically, in combination with Figure 6 , the three flow splitting parts in this embodiment are in a trident star shape. The three points of the trident star shape far from the center are arranged at intervals and evenly along the circumferential direction of the nozzle 120 and are fixedly connected to the nozzle 120 to form three flow splitting ports.

[0064] Among them, the three flow splitting parts in this embodiment are arranged in the same direction. In this structure, after the mixture flows out through the three flow splitting ports, it deflects and sprays in the same direction. Compared with the structure of a single nozzle 120 or a single flow splitting port, the atomizing spray gun provided in this embodiment can disperse the air flow more evenly, has a larger scattering area, and higher atomization efficiency.

[0065] Moreover, in this embodiment, the flow splitting part, the nozzle 120, the fluid channel 110 and the gas channel are all processed by CNC, and have a smooth and hollow structural feature, effectively reducing the resistance and residue when the fluid passes through.

[0066] In this embodiment, the gun body 100 is an integrally formed structure.

[0067] Specifically, in this embodiment, the gun body 100 is formed by an integrated molding process. The air flow channel and the fluid channel 110 are both constructed inside the gun body 100. The sealing performance of the air flow channel and the fluid channel 110 is very excellent, and the volume of the gun body 100 is smaller, which is convenient for carrying and storage.

[0068] In addition, in this embodiment, the connections between the gun body 100 and the intake compression part 300, between the gun body 100 and the nozzle 210, between the gun body 100 and the fluid adapter 500, between the intake compression part 300 and the air connector 400, and between the fluid adapter 500 and the fluid connector 600 are all connected by means of thread fitting, which is convenient for disassembly. And different air connectors 400 and fluid connectors 600 can be replaced according to different specifications of external compressed air sources and fluid pumping equipment, and different specifications of nozzles 210 can also be replaced according to different spraying range requirements, with better adaptability.

[0069] As an implementable manner, the connection manners between the gun body 100 and the intake compression member 300, between the gun body 100 and the nozzle 210, between the gun body 100 and the fluid adapter 500, between the intake compression member 300 and the air connector 400, and between the fluid adapter 500 and the fluid connector 600 can also be replaced with snap connections, and the above effects can also be achieved.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An atomizing spray gun, characterized in that, Comprising: A gun body (100) having a gas channel, a fluid channel (110) and a nozzle (120), wherein the gas channel is used to connect and convey high-pressure gas, the fluid channel (110) is used to connect and convey fluid, the outlet end of the gas channel faces the nozzle (120) and is in communication with the nozzle (120), and the fluid channel (110) is in communication with the nozzle (120) from one side of the gas channel; A spray head assembly (200) including a nozzle (210) and a flow dividing member (220), wherein the nozzle (210) is detachably connected to the nozzle (120), the flow dividing member (220) is disposed in the nozzle (120), the flow dividing member (220) forms a plurality of flow dividing openings in the nozzle (120), the sum of the cross-sectional areas of the plurality of flow dividing openings is smaller than the cross-sectional area of the nozzle (120), and the discharge directions of the plurality of flow dividing openings are the same.

2. The atomizing spray gun according to claim 1, wherein, The atomizing spray gun further includes: An air intake compression member (300) detachably connected to the gun body (100), and an acceleration channel (310) communicating with the gas channel is provided in the air intake compression member (300), and the acceleration channel (310) is of a tapered structure from the intake end to the outlet end.

3. The atomizing spray gun according to claim 2, wherein The atomizing spray gun further includes: An air joint (400) with one end for connecting to a compressed air source and the other end threadedly mating with the intake end of the air intake compression member (300).

4. The atomizing spray gun according to claim 2, characterized in that, The fluid channel (110) has a fixed inner diameter.

5. The atomizing spray gun according to claim 4, characterized in that, The atomizing spray gun further includes: A fluid adapter (500) having an input channel (510), one end of the fluid adapter (500) being an access end for accessing fluid and the other end being an outlet end communicating with the fluid channel (110), and the input channel (510) tapering from the access end to the outlet end.

6. The atomizing spray gun according to claim 5, characterized in that, The atomizing spray gun further includes: A fluid joint (600) with one end for connecting to a fluid pumping device and the other end threadedly mating with the access end of the fluid adapter (500).

7. The atomizing spray gun according to claim 1, wherein, The flow dividing member (220) includes: A flow dividing portion, one end of which close to the nozzle (120) is a flow dividing end, one ends of the plurality of flow dividing portions are joined together, and the other ends are spaced along the circumference of the nozzle (120) to form the flow dividing openings.

8. The atomizing spray gun according to claim 7, characterized in that, The longitudinal section of the flow dividing portion is of a structure with thin upper and lower ends and thick middle part; Both side surfaces of the flow dividing portion are two curved surfaces with different curvatures.

9. The atomizing spray gun according to claim 7, wherein, The inner wall of the nozzle (120) is smoothly processed; There are three flow dividing portions, one ends of the three flow dividing portions are connected to each other, and the other ends are spaced and evenly arranged along the circumference of the nozzle (120) and connected to the inner wall of the nozzle (120).

10. The atomizing spray gun according to any one of claims 1-9, characterized in that, The gun body (100) is an integrally formed structure.

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