A dual fluid spray nozzle or gas-liquid mixing nozzle

Abstract

The application discloses a double-fluid nozzle or gas-liquid mixing nozzle, and belongs to the field of water spraying. The nozzle comprises an air jet pipe, a water jet pipe and a nozzle head. The water jet pipe is threadedly connected with the air jet pipe and is located inside the air jet pipe. The outer wall of the water jet pipe and the inner wall of the air jet pipe form an air injection gap. The water jet opening of the water jet pipe is coincident with the air jet opening of the air jet pipe. The air jet opening of the air jet pipe is provided with the nozzle head. The side wall of the air jet pipe is provided with an air inlet, and the end of the water jet pipe is provided with a water inlet. The application has the beneficial effect that the water jet pipe is arranged inside the air jet pipe, the outer wall of the water jet pipe and the inner wall of the air jet pipe form an air injection gap, and the water jet opening is coincident with the air jet opening at the end. When the air flow and the water flow meet at the coincident jet opening (i.e. inside the nozzle head), the annular high-speed air flow can generate symmetrical and uniform shearing force and crushing effect on the central water flow from 360-degree directions, thereby completely eliminating the problems of deflection and air flow disorder caused by traditional side air inlet, and making the sprayed gas-liquid mixture more uniform and the atomized particles more fine.

Description

Technical Field

[0001] This application relates to the field of water spraying, and in particular to a dual-fluid nozzle or a gas-liquid mixing nozzle. Background Technology

[0002] Dual-fluid nozzles or gas-liquid mixing nozzles are widely used in many fields such as industrial cleaning, cooling, environmental dust removal, humidification, and agricultural spraying. Their basic working principle is to use the kinetic energy of high-pressure gas (such as compressed air) to shear and impact the liquid flow (such as water), breaking the liquid into fine particles, thereby achieving gas-liquid mixing and atomized spraying.

[0003] Currently, most commercially available dual-fluid nozzles or gas-liquid mixing nozzles employ a one-piece molded structure or a complex parallel liquid and gas inlet pipe design. However, in actual industrial applications and daily operations, existing dual-fluid nozzles or gas-liquid mixing nozzles mainly suffer from the following technical problems:

[0004] During long-term operation, tiny impurities and scale carried in the water path or oil from the air path can easily accumulate inside the pipes, especially at the nozzle, leading to nozzle blockage. Traditional nozzles, whose internal and external structures are often welded, glued, or integrally molded, are often impossible for operators to disassemble and clean once internal blockage occurs, forcing them to scrap the entire nozzle. This significantly shortens the equipment's lifespan and increases the company's consumable costs.

[0005] Traditional parallel or side-by-side confluence air-liquid channels not only result in a large overall nozzle size, occupying installation space, but also make it difficult to ensure the concentricity of the air and water flows at their convergence. This asymmetrical channel structure easily leads to fluid deviation or turbulence within the pipe, causing uneven collision between the air and liquid at the nozzle. Ultimately, this results in inconsistent atomized particle size and unstable injection pressure pulsation (i.e., the "spraying water" phenomenon), making it difficult to meet the requirements for high-precision atomization or uniform cleaning.

[0006] Therefore, how to provide a compact and reasonable dual-fluid nozzle or gas-liquid mixing nozzle that is easy to disassemble and clean, and can achieve uniform gas-liquid mixing and efficient jetting, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] To address the challenge of achieving high-precision atomization or uniform cleaning, this application provides a dual-fluid nozzle or a gas-liquid mixing nozzle.

[0008] The technical solution provided in this application for a dual-fluid nozzle or gas-liquid mixing nozzle is as follows:

[0009] A dual-fluid nozzle or gas-liquid mixing nozzle includes: an air jet pipe, a water jet pipe, and a nozzle head; the water jet pipe is threadedly connected to the air jet pipe, and the water jet pipe is located inside the air jet pipe; the outer wall of the water jet pipe and the inner wall of the air jet pipe form an air injection gap.

[0010] The water spray nozzle of the water spray pipe coincides with the air spray nozzle of the air jet pipe; the air jet nozzle of the air jet pipe is provided with a nozzle; the side wall of the air jet pipe is provided with an air inlet, and the end of the water spray pipe is provided with a water inlet.

[0011] Furthermore, the jet pipe includes a jet section, a first connecting section and a second connecting section disposed at both ends of the jet section, and an air inlet disposed on the side of the jet section and used to form an air inlet; the water spray pipe includes a third connecting section and a water spray section connected to the third connecting section, and the water inlet is formed in the third connecting section; the nozzle is detachably connected to the second connecting section, one end of the third connecting section is detachably connected to the first connecting section, and the other end of the third connecting section is externally connected to a water injection pipe.

[0012] Furthermore, the first connecting part, the second connecting part, and the third connecting part are all threaded grooves.

[0013] Furthermore, a spiral plate is provided in the gas injection gap, and the spiral plate forms a spiral cavity in the gas injection gap.

[0014] Furthermore, multiple inclined plates are provided near the paint spray nozzle in the air injection gap. The inclined plates are fixed to the outer wall of the water spray pipe and abut against the inner wall of the air spray pipe.

[0015] Furthermore, the nozzle has a conical structure, and a cylindrical cavity and a conical cavity are provided inside the nozzle; the nozzle has a receiving space, which is located in the cylindrical cavity and is connected to the air jet nozzle.

[0016] Furthermore, piezoelectric ceramics are disposed in the accommodating space.

[0017] Furthermore, the spiral plate is detachably connected to the water spray pipe, and the spiral plate has a spiral mounting groove inside, in which a heating wire is installed; the water spray pipe is also provided with a guide groove, through which the heating wire is guided to the outside of the water spray pipe and the air jet pipe and connected to an external power source.

[0018] Furthermore, an annular plate is provided at the end of the spiral plate, and a connecting groove is provided on the annular plate, which connects the mounting groove and the guide groove.

[0019] Furthermore, a mounting bracket is provided on the portion of the water spray pipe outside the jet pipe, and a battery pack connected to the heating wire is mounted on the mounting bracket.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] This invention places the water spray pipe inside the jet nozzle, creating an air injection gap between the outer wall of the water spray pipe and the inner wall of the jet nozzle, and aligns the water spray nozzle with the jet nozzle at the end. Due to this coaxial sleeve design, the high-pressure gas entering from the side air inlet forms a uniform annular airflow surrounding the water spray pipe within the air injection gap. When the airflow and water flow converge at the overlapping nozzle (i.e., inside the nozzle head), the high-speed annular airflow generates symmetrical and uniform shearing and pulverizing forces on the central water flow from a 360-degree angle, completely eliminating the flow deviation and turbulence problems caused by traditional side air intakes. This results in a more uniform gas-liquid mixture and finer atomized particles. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0023] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0024] Figure 3 This is a schematic diagram of the spiral plate and some of the surrounding parts.

[0025] Figure label:

[0026] 1. Jet pipe; 11. Jet nozzle; 12. Air inlet; 13. First connecting part; 14. Second connecting part;

[0027] 2. Water spray pipe; 21. Water spray nozzle; 22. Water inlet; 23. Third connection part; 24. Water spray part;

[0028] 3. Nozzle; 31. Containment space;

[0029] 4. Spiral plate;

[0030] 5. Mounting slot;

[0031] 6. Guide groove;

[0032] 7. Ring plate; 71. Connecting groove. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0034] This embodiment provides a dual-fluid nozzle or gas-liquid mixing nozzle, which includes an air jet pipe 1, a water jet pipe 2 disposed inside the air jet pipe 1, and a nozzle 3 connected to the air jet port 11 of the air jet pipe 1. The water jet pipe 2 is connected to the air jet pipe 1 by a thread, and the water jet pipe 2 is arranged along the axial direction of the air jet pipe 1.

[0035] The jet pipe 1 is a hollow tubular structure, with an annular air injection gap formed between its inner wall and the outer wall of the water spray pipe 2 located inside, for gas to flow through. The water spray pipe 2 has a water flow channel inside, and its end is provided with a water inlet 22 for connection to an external water supply pipeline. The side wall of the jet pipe 1 is provided with an air inlet 12 for connection to an external air supply pipeline.

[0036] At the outlet end of the jet pipe 1, its jet nozzle 11 and the water nozzle 21 of the water spray pipe 2 are coaxially aligned, meaning their spray centerlines coincide, thus achieving the mixing and ejection of gas and liquid at the outlet. The nozzle 3 is connected to the jet nozzle 11 for secondary shaping, pressurization, and / or atomization of the mixed gas-liquid flow.

[0037] With the above structure, gas enters the injection gap from the air inlet 12 on the side wall of the jet pipe 1 and flows along the axial direction of the jet pipe 1 towards the jet outlet 11; water enters from the water inlet 22 at the end of the water spray pipe 2, flows along the axial direction of the water spray pipe 2 towards the water outlet 21, and is sprayed out after mixing with the gas at the nozzle 3, thus realizing gas-liquid mixed injection.

[0038] Preferably, the jet pipe 1 includes a jet section, a first connecting section 13 and a second connecting section 14 disposed at both ends of the jet section, and an air intake section disposed on the side of the jet section and forming an air intake 12.

[0039] Wherein: the jet section is the middle main section, used to limit the main length of the air injection gap; the first connecting part 13 is provided at the end of the jet section near the air intake section, used to be threadedly connected to the third connecting part 23 of the water spray pipe 2, so as to realize the coaxial fixation of the water spray pipe 2 and the jet pipe 1; the second connecting part 14 is provided at the end of the jet section away from the air intake section, used to be threadedly connected to the nozzle 3; the air intake section is integrally or fixedly connected to the jet section, and an air inlet 12 communicating with the air injection gap is provided on its side wall, used to connect to the external air source pipeline.

[0040] The water spray pipe 2 includes a third connecting part 23 and a water spray section 24 connected to the third connecting part 23. The third connecting part 23 is a pipe end structure, one end of which is detachably connected to the first connecting part 13 of the jet pipe 1 to form a reliable coaxial connection; the other end of the third connecting part 23 extends outward from the jet pipe 1 and forms a water inlet 22 at its outer end. The water inlet 22 is used to connect to an external water injection pipe to supply pressurized or atmospheric pressure water into the water spray pipe 2.

[0041] Through the above structural design, both the jet pipe 1 and the water spray pipe 2 adopt a standard threaded connection, which is convenient for disassembly and assembly, maintenance and replacement of parts, and at the same time facilitates the adaptation of dual-fluid jet pipes or gas-liquid mixing nozzles to air supply and water supply pipelines of different specifications.

[0042] In a preferred embodiment, the first connecting part 13, the second connecting part 14, and the third connecting part 23 all adopt a threaded groove structure.

[0043] Specifically: the inner wall of the first connecting part 13 is provided with a first threaded groove, and the outer wall of the third connecting part 23 is provided with a first external thread that mates with the first threaded groove. After the two are threaded together, the water spray pipe 2 is axially fixed and radially limited inside the air jet pipe 1; the outer wall of the second connecting part 14 is provided with a second external thread, and the inner wall of the connecting end of the nozzle 3 is provided with a second threaded groove that mates with the second external thread, so that the nozzle 3 and the air jet pipe 1 can be detachably connected; the outer end of the third connecting part 23 can be provided with a third external thread according to the specifications of the external water pipe, so as to be threadedly connected to the corresponding pipe joint.

[0044] The detachable connection between the jet pipe 1, water spray pipe 2 and nozzle 3 is achieved by using threaded grooves and external threads. It has the advantages of mature processing technology, good sealing performance, high pressure resistance and convenient disassembly and assembly, which is conducive to the flexible application and maintenance of dual-fluid nozzles or gas-liquid mixing nozzles under different working conditions.

[0045] In this embodiment, a spiral plate 4 is provided in the air injection gap between the jet pipe 1 and the water spray pipe 2. The spiral plate 4 is spirally wound along the axis of the water spray pipe 2, and the spiral plate 4, together with the outer wall of the water spray pipe 2 and the inner wall of the jet pipe 1, defines a spiral cavity.

[0046] The spiral channel is used to guide the gas along the axial direction and with a certain tangential rotation, so that the gas forms a stable vortex as it flows toward the jet nozzle 11. Due to the guiding effect of the spiral plate 4, the flow path of the gas in the injection gap is significantly extended, which on the one hand increases the heat exchange and friction between the gas and the outer wall of the water spray pipe 2, and on the other hand improves the flow velocity stability and rotational momentum of the gas before it is ejected.

[0047] When the gas and the water jet ejected from the nozzle 21 meet and mix inside the nozzle 3 or near the nozzle 3 outlet, the rotational momentum carried by the gas can induce a rotating flow field in the water flow, causing the water flow to present as a fine atomization or a mist with a certain cone angle, which is beneficial to improving the spraying effect and coverage uniformity.

[0048] In another preferred embodiment, a plurality of inclined plates are provided in the air injection gap near the jet nozzle 11. The plurality of inclined plates are arranged at intervals along the circumference of the water spray pipe 2, with one end of each inclined plate fixed to the outer wall of the water spray pipe 2 and the other end abutting against the inner wall of the jet pipe 1, thereby dividing part of the air injection gap into a plurality of inclined small channels.

[0049] The inclined plate is tilted at a certain angle relative to the axis, and its purpose includes, but is not limited to:

[0050] To rectify and accelerate the rotating airflow flowing along the axial direction;

[0051] As the airflow approaches the nozzle 11, it is further guided to converge towards the central region of the nozzle, thereby increasing the turbulence intensity in the area where the gas and water flow meet.

[0052] The formation of localized shear flow improves the mixing efficiency of gas and water, which is beneficial for further refining the droplet size.

[0053] Multiple inclined plates can be used in conjunction with the spiral plate 4. That is, the spiral plate 4 is set in the middle of the jet pipe 1 and the inclined plate is set near the jet port 11, so that the airflow first passes through the spiral cavity to form a vortex, and then passes through the inclined plate for rectification and acceleration. Finally, it is fully mixed with the water flow in the nozzle 3, thereby obtaining a better gas-liquid mixing jet effect.

[0054] The nozzle 3 has a conical structure, with a cylindrical cavity and a conical cavity communicating with the cylindrical cavity inside. A receiving space 31 is formed inside the nozzle 3, which is located inside the cylindrical cavity and is connected to the air outlet 11 of the air pipe 1.

[0055] Specifically, one end of the nozzle 3 is a connecting end, and a connecting cavity is formed inside it that is threaded into the second connecting part 14; the interior of the connecting cavity is a cylindrical cavity that extends forward and gradually transitions into a conical cavity. The outlet of the conical cavity is the nozzle outlet of the nozzle 3. A receiving space 31 is arranged inside the cylindrical cavity, and the receiving space 31 is coaxial with the air outlet 11 of the air jet pipe 1, and can be used to accommodate functional components.

[0056] The conical cavity's contraction structure can, on the one hand, contract and accelerate the gas-liquid mixture flowing into the cylindrical cavity, and on the other hand, form the mixture into a certain cone angle or cylindrical spray pattern, thereby meeting the spray requirements of different application scenarios.

[0057] In this embodiment, a piezoelectric ceramic is disposed in the receiving space 31 of the nozzle 3. The piezoelectric ceramic is preferably a ring-shaped or sheet-shaped structure, and its arrangement corresponds to the axis of the water nozzle 21 and the air nozzle 11, so that the gas-liquid mixture ejected from the air nozzle 11 can pass through the sound field or vibration field region formed by the piezoelectric ceramic.

[0058] In practical applications, piezoelectric ceramics, driven by an external power source, can generate high-frequency vibrations. When the gas-liquid mixture flows through the containment space 31, the liquid is further broken into finer droplets under the high-frequency vibration of the piezoelectric ceramics, thereby significantly improving the atomization effect. Furthermore, by adjusting the driving frequency and voltage amplitude of the piezoelectric ceramics, the particle size distribution of the droplets ejected from the nozzle 3 can be flexibly adjusted to meet the needs of different application scenarios (such as disinfection spraying, humidification, coating, or cooling).

[0059] The piezoelectric ceramic can be fixed in the receiving space 31 by means of clips, threaded pressure rings, or elastic pressure rings, which facilitates disassembly and replacement. The nozzle 3 can also be provided with a wire interface for electrical connection to the piezoelectric ceramic to connect to an external drive circuit.

[0060] In another embodiment, the spiral plate 4 and the water spray pipe 2 are detachably connected. The spiral plate 4 itself is a spiral structure surrounding the outer wall of the water spray pipe 2, and an installation groove 5 is formed inside it along the spiral direction. A heating wire is arranged in the installation groove 5 along the spiral direction.

[0061] A guide groove 6 is provided on the outer wall of the water spray pipe 2. The guide groove 6 extends from one end of the spiral plate 4 near the outside of the jet pipe 1 to the part of the water spray pipe 2 that extends out of the jet pipe 1. One end of the heating wire is arranged in the mounting groove 5 of the spiral plate 4, and the other end is led out to the outside of the water spray pipe 2 through the connecting groove 71 (see below) and the guide groove 6 so as to connect to an external power supply, thereby providing electrical energy to heat the spiral plate 4.

[0062] When the external power supply is turned on, the heating wire generates heat, which is conducted through the spiral plate 4 to the gas in the air injection gap and the outer wall of the adjacent water spray pipe 2, thereby preheating the water flowing inside. In this way, the dual-fluid nozzle or gas-liquid mixing nozzle of the present invention can be used in low-temperature or freezing environments, effectively avoiding water freezing in the pipe or excessive viscosity affecting the spray; at the same time, it can also realize the heating and spraying of the spray medium, such as warm atomization, water-vapor mixing spray and other application scenarios.

[0063] The spiral plate 4 has a detachable structure, which is convenient for maintenance and replacement. When the heating wire is damaged, the spiral plate 4 component can be replaced separately without affecting the main structure of the jet pipe 1 and the water spray pipe 2.

[0064] A ring plate 7 is provided at the end of the spiral plate 4. The ring plate 7 is arranged around the outer wall of the water spray pipe 2, and its cross-section is annular. A connecting groove 71 is provided on the ring plate 7, which is used to connect the mounting groove 5 with the guide groove 6 on the outer wall of the water spray pipe 2.

[0065] Specifically, after the heating wire is arranged along the mounting groove 5 inside the spiral plate 4 to the end of the spiral plate 4, it is folded through the connecting groove 71 on the ring plate 7 and enters the guide groove 6 on the outer wall of the water spray pipe 2, and then continues to extend along the guide groove 6 to the outside of the water spray pipe 2. This structure simplifies the wiring of the heating wire, maintains good mechanical protection and electrical insulation between the heating wire inside the spiral plate 4 and the outer wall of the water spray pipe 2, reduces the exposed length of the heating wire, and improves the reliability and safety of the overall structure.

[0066] With the setting of the ring plate 7 and the connecting groove 71, the electrical connection path of the heating wire is standardized and modularized, which is conducive to achieving standardized operation in the manufacturing and assembly process and improving production efficiency.

[0067] In a further embodiment, the water spray pipe 2 is provided with a mounting bracket on the portion of it located outside the jet pipe 1. The mounting bracket may be a ring clamp, a frame, or a support structure, which serves to enhance the mechanical stability of the water spray pipe 2 in the external area and to mount a battery pack or other power supply module.

[0068] The battery pack is electrically connected to the heating wire via wires, providing power to the heating wire. Furthermore, the battery pack can simultaneously power the piezoelectric ceramic housed within the nozzle 3's receiving space 31, forming an independent local power supply system. Thus, even in situations without an external power source or where power wiring is inconvenient, the dual-fluid nozzle or gas-liquid mixing nozzle of this invention can still achieve heating and piezoelectric atomization functions, while also possessing high mobility and deployment flexibility.

[0069] The mounting bracket can be fixedly connected to the water spray pipe 2 by means of screws, clips or welding. Its shape and size can be reasonably designed according to the specifications of the battery pack to facilitate the installation, disassembly and replacement of the battery pack.

[0070] During typical operation, an external air source enters the air injection gap of the jet pipe 1 through the air inlet 12. It flows axially and tangentially within the spiral cavity formed by the spiral plate 4 to form a swirling flow. Under the guidance of multiple inclined plates, it is further rectified and accelerated near the jet nozzle 11. At the same time, an external water source enters the water spray pipe 2 through the water inlet 22. It flows axially towards the water spray nozzle 21 inside the water spray pipe 2. When it is sprayed out from the water spray nozzle 21, it merges and mixes with the airflow sprayed from the air injection gap in the cylindrical cavity and conical cavity of the nozzle 3.

[0071] Under the high-frequency vibration of the piezoelectric ceramic, the liquid in the mixed flow is further broken into fine droplets, which are ejected from the nozzle 3 to form a fine and uniform mist jet. When the heating wire is working, the gas in the gas injection gap and the water flow in the water spray pipe 2 can be heated and sprayed out to form a warm atomized medium, which is suitable for antifreeze, heating or special process applications.

[0072] This invention improves the mixing efficiency of gas and water in the nozzle 3 by setting a spiral plate 4 and an inclined plate between the jet pipe 1 and the water spray pipe 2, so that the gas forms a stable rotating flow field before entering the nozzle 3. The special receiving space 31 and piezoelectric ceramic inside the nozzle 3 realize secondary fine atomization of the gas-liquid mixture at the nozzle 3 outlet. The heating wire, ring plate 7 and connecting groove 71 in the spiral plate 4, as well as the fixing frame and battery pack outside the water spray pipe 2, realize the modular heating and independent power supply function of the dual-fluid nozzle or gas-liquid mixing nozzle. The overall structure is compact, easy to disassemble and assemble, and highly adaptable, and can meet the performance requirements of gas-liquid mixing injection in various application scenarios.

[0073] Those skilled in the art will understand that, without altering the essential spirit of the technical solution of the present invention, various changes or substitutions can be made to the structural form, material selection, size ratio, and specific connection method of the above embodiments, and all of these should fall within the protection scope defined by the claims of the present invention.

Claims

1. A dual-fluid nozzle or gas-liquid mixing nozzle, characterized in that, include: A jet pipe, a water spray pipe, and a nozzle; the water spray pipe is threadedly connected to the jet pipe, and the water spray pipe is located inside the jet pipe; The outer wall of the water spray pipe and the inner wall of the air jet pipe form an air injection gap; The water spray nozzle of the water spray pipe coincides with the air spray nozzle of the air jet pipe; the air jet nozzle of the air jet pipe is equipped with a nozzle. An air inlet is provided on the side wall of the jet pipe, and a water inlet is provided at the end of the water spray pipe.

2. The dual-fluid nozzle or gas-liquid mixing nozzle according to claim 1, characterized in that: The jet pipe includes a jet section, a first connecting section and a second connecting section disposed at both ends of the jet section, and an air intake section disposed on the side of the jet section and used to form an air inlet; The water spray pipe includes a third connecting part and a water spray part connected to the third connecting part, and the water inlet is formed in the third connecting part; The nozzle is detachably connected to the second connecting part, one end of the third connecting part is detachably connected to the first connecting part, and the other end of the third connecting part is connected to a water injection pipe.

3. The dual-fluid nozzle or gas-liquid mixing nozzle according to claim 2, characterized in that: The first connecting part, the second connecting part and the third connecting part are all threaded grooves.

4. The dual-fluid nozzle or gas-liquid mixing nozzle according to claim 3, characterized in that: A spiral plate is provided in the gas injection gap, and the spiral plate forms a spiral cavity in the gas injection gap.

5. The dual-fluid nozzle or gas-liquid mixing nozzle according to claim 4, characterized in that: Multiple inclined plates are provided near the paint spray nozzle in the air injection gap. The inclined plates are fixed to the outer wall of the water spray pipe and abut against the inner wall of the air spray pipe.

6. The dual-fluid nozzle or gas-liquid mixing nozzle according to claim 5, characterized in that: The nozzle has a conical structure, and a cylindrical cavity and a conical cavity are provided inside the nozzle; the nozzle has a receiving space, which is located in the cylindrical cavity and is connected to the air jet nozzle.

7. The dual-fluid nozzle or gas-liquid mixing nozzle according to claim 6, characterized in that: Piezoelectric ceramics are disposed in the accommodating space.

8. The dual-fluid nozzle or gas-liquid mixing nozzle according to claim 7, characterized in that: The spiral plate is detachably connected to the water spray pipe, and the spiral plate has a spiral mounting groove inside, in which a heating wire is installed; The water spray pipe is also provided with a guide groove, through which the heating wire is guided to the outside of the water spray pipe and the air jet pipe and connected to an external power source.

9. The dual-fluid nozzle or gas-liquid mixing nozzle according to claim 8, characterized in that: The spiral plate is provided with an annular plate at its end, and a connecting groove is provided on the annular plate, which connects the mounting groove and the guide groove.

10. The dual-fluid nozzle or gas-liquid mixing nozzle according to claim 9, characterized in that: The water spray pipe is mounted on a bracket on the portion outside the jet pipe, and a battery pack connected to the heating wire is mounted on the bracket.

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