A spray nozzle for metal spraying

Abstract

The utility model discloses a kind of spraying nozzles for metal spraying, it relates to the field of metal spraying, the utility model includes nozzle, nozzle top end is equipped with spout, the outer wall of nozzle is equipped with a plurality of radiating fins, the outer wall of nozzle top is fixed with internal thread ring, and the internal thread of internal thread ring is connected with second threaded joint, the end of second threaded joint is equipped with baffle cover. The utility model is provided with baffle cover and conical ring, baffle cover is installed on the outer wall of nozzle top, forms annular barrier, directly blocks most of diffused water mist to contact radiating fin, reduces the coating adhesion amount on the surface of radiating fin, reduces the cleaning frequency of the surface of radiating fin;By being provided with helical flow guide groove, when water mist produced by spraying diffuses to the inner wall of baffle cover, helical flow guide groove will guide airflow to drive water mist to flow along groove helix, will reduce the escape of water mist to radiating fin direction, while reducing the impact turbulent flow of water mist and baffle cover inner wall, avoid secondary diffusion caused by airflow turbulence.

Description

Technical Field

[0001] This utility model relates to the field of spray nozzles, specifically a spray nozzle for metal spraying. Background Technology

[0002] Metal spraying, a major branch of thermal spraying, is a surface treatment and remanufacturing technology. Its core principle is to use a heat source (such as an electric arc, flame, plasma, etc.) to heat metal materials (wires or powders) to a molten or semi-molten state, and then atomize and accelerate them through a high-speed airflow, spraying them onto a pre-treated work surface to form a metal coating with specific functions. The spray nozzle is an important component of the spraying machine. When the paint passes through the narrow channels and orifices inside the spray nozzle at a very high speed, it generates huge fluid friction, thereby converting kinetic energy into heat energy, and then spraying it out through the orifice.

[0003] According to Chinese Patent No. CN218459932U, a spray nozzle for a spraying machine that is easy to disassemble is disclosed. This utility model is equipped with heat sink and coolant pipeline, which has strong heat dissipation capacity, can be used continuously for a longer period of time under high intensity, and is not easy to overheat and deform, thus having stronger reliability.

[0004] Regarding the aforementioned patent content, since the atomized metal particles or paint mist during nozzle spraying may diffuse and adhere to the heat dissipation fins, the paint may remain on the heat dissipation fins, increasing their thickness and potentially causing fin gap blockage. This reduces heat dissipation efficiency, affecting the duration of high-intensity continuous use. Overheating may also cause the spray nozzle to deform, reducing equipment reliability. Furthermore, frequent and complex cleaning work increases maintenance costs and downtime, impacting the efficiency of the spraying operation. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a spray nozzle for metal spraying, so as to solve the technical problem that water mist generated during the spraying process may diffuse and adhere to the heat dissipation fins, thereby affecting their heat dissipation efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a spray nozzle for metal spraying, comprising a nozzle, an orifice at the top of the nozzle, a plurality of heat dissipation fins installed on the outer wall of the nozzle, an internal threaded ring fixed above the outer wall of the nozzle, and a second threaded connector connected to the internal thread of the internal threaded ring, a baffle installed at the end of the second threaded connector, a spiral guide groove provided on the inner wall of the baffle, and a conical ring installed on the outer wall of the baffle.

[0007] By adopting the above technical solution, the baffle can be quickly disassembled through a threaded connection, and the baffle is installed above the outer wall of the nozzle to form a ring barrier, which directly blocks most of the diffused water mist from contacting the heat dissipation fins and reduces the amount of coating adhering to the surface of the heat dissipation fins.

[0008] Furthermore, the nozzle is equipped with a cooling pipe inside, and the water inlet end of the cooling pipe is connected to a liquid inlet pipe extending to the outside of the nozzle.

[0009] By adopting the above technical solution, external coolant can enter the interior of the cooling pipe through the inlet pipe and flow inside the cooling pipe.

[0010] Furthermore, the outlet end of the cooling pipe is connected to a liquid outlet pipe extending to the outside of the nozzle.

[0011] By adopting the above technical solution, the coolant, after absorbing heat, flows out from the outlet pipe.

[0012] Furthermore, both the outlet pipe and the inlet pipe are equipped with connectors.

[0013] By adopting the above technical solution, the connector is designed to facilitate connection with external infusion pipelines.

[0014] Furthermore, a first threaded connector is installed at the bottom end of the nozzle.

[0015] By adopting the above technical solution, the first threaded connector is used to connect the spraying equipment to ensure stable material input.

[0016] Furthermore, the shield is detachably connected to the internal threaded ring via a second threaded connector.

[0017] By adopting the above technical solution, the baffle can be easily disassembled, thereby allowing for cleaning.

[0018] Furthermore, the diameter of the plurality of heat dissipation fins increases sequentially from the front end to the rear end of the nozzle.

[0019] By adopting the above technical solution, the high-temperature front end area enhances air convection heat dissipation through a larger fin area, thereby improving the heat dissipation effect.

[0020] Furthermore, the nozzle is made of tungsten carbide alloy material.

[0021] By adopting the above technical solutions, the nozzles have high wear resistance and high temperature resistance, thereby extending the service life of the nozzles.

[0022] Furthermore, the shield is made of titanium alloy (TC4) material.

[0023] By adopting the above technical solutions, the corrosion resistance of the shield (resistance to solvent and water vapor corrosion in the spraying environment) can be improved, and the titanium alloy has high strength.

[0024] Furthermore, the baffle and the conical ring are integrally formed.

[0025] By adopting the above technical solution, the baffle and the conical ring form a continuous integral structure, thereby improving the resistance to deformation.

[0026] In summary, the present invention has the following main advantages:

[0027] 1. This utility model has a baffle and a conical ring. The baffle is installed above the outer wall of the nozzle to form a ring barrier, which directly blocks most of the diffused water mist from contacting the heat dissipation fins, reduces the amount of coating adhering to the surface of the heat dissipation fins, and reduces the frequency of cleaning the surface of the heat dissipation fins.

[0028] 2. By providing a spiral guide groove, when the water mist generated by spraying diffuses to the inner wall of the baffle, the spiral guide groove will guide the airflow to drive the water mist to flow spirally along the groove, which will reduce the escape of water mist towards the heat dissipation fins, and at the same time reduce the impact turbulence between water mist and the inner wall of the baffle, thus avoiding secondary diffusion caused by airflow turbulence.

[0029] 3. With the addition of an internal threaded ring, this utility model allows operators to directly remove the cover for individual cleaning (such as wiping or rinsing) after long-term use, as a small amount of paint will inevitably adhere to the inner wall of the cover. This detachable structure eliminates the need to disassemble the entire nozzle or heat dissipation fins, significantly reducing maintenance time. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the shield structure of this utility model;

[0032] Figure 3 This is a schematic diagram of the overall orthographic structure of this utility model;

[0033] Figure 4 This is a schematic diagram of the overall bottom view of the present invention;

[0034] Figure 5 This is a schematic diagram of the cooling pipe structure of this utility model.

[0035] In the diagram: 1. Nozzle; 2. Spray nozzle; 3. First threaded connector; 4. Cooling pipe; 5. Inlet pipe; 6. Outlet pipe; 7. Heat dissipation fins; 8. Connector; 9. Baffle; 10. Internal threaded ring; 11. Spiral guide groove; 12. Conical ring; 13. Second threaded connector. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The embodiments of this utility model will be described below based on its overall structure.

[0038] Example 1:

[0039] A spray nozzle for metal spraying, such as Figures 1-5 As shown, the nozzle includes a nozzle 1 with a nozzle 2 at its top. Multiple heat dissipation fins 7 are installed on the outer wall of the nozzle 1. The heat dissipation fins 7 are made of a high thermal conductivity material (such as 6061 aluminum alloy). An internal threaded ring 10 is fixed on the upper part of the outer wall of the nozzle 1, and a second threaded connector 13 is connected to the internal thread of the internal threaded ring 10. The internal threaded ring 10 is made of Invar alloy (Fe-Ni36). A baffle 9 is installed at the end of the second threaded connector 13. The inner wall of the baffle 9 is provided with a spiral guide groove 11, and a conical ring 12 is installed on the outer wall of the baffle 9.

[0040] Specifically, the baffle 9 and the conical ring 12 are integrally formed, forming a continuous overall structure, thereby improving the resistance to deformation. The baffle 9 is quickly disassembled through a threaded connection, and the baffle is installed above the outer wall of the nozzle 1 to form an annular barrier, directly blocking most of the diffused water mist from contacting the heat dissipation fins 7, reducing the amount of coating adhering to the surface of the heat dissipation fins 7. The baffle 9 is detachably connected to the inner threaded ring 10 through the second threaded joint 13, which facilitates the disassembly of the baffle 9 and allows for cleaning of the baffle 9.

[0041] See Figures 1-5 The nozzle 1 is equipped with a first threaded connector 3 at its bottom end. The first threaded connector 3 is used to connect to the spraying equipment to ensure stable material input. The nozzle 1 is made of tungsten carbide alloy material, which gives the nozzle 1 high wear resistance and high temperature resistance, thereby extending the service life of the nozzle 1. The nozzle 1 is equipped with a cooling pipe 4 inside. The water inlet end of the cooling pipe 4 is connected to a liquid inlet pipe 5 extending to the outside of the nozzle 1. External coolant can enter into the cooling pipe 4 through the liquid inlet pipe 5 and flow inside the cooling pipe 4. The water outlet end of the cooling pipe 4 is connected to a liquid outlet pipe 6 extending to the outside of the nozzle 1. A connector 8 is installed at one end of the liquid outlet pipe 6 and one end of the liquid inlet pipe 5. The connector 8 is set to facilitate connection with external liquid delivery pipelines. The built-in cooling pipe 4 inputs coolant through the liquid inlet pipe 5, flows through the inside of the nozzle and is discharged from the liquid outlet pipe 6 to dissipate heat from the nozzle.

[0042] Example 2:

[0043] Based on the above embodiment 1, the following method will be adopted to improve the heat dissipation efficiency of the heat sink 7.

[0044] Specifically, the diameter of the multiple heat dissipation fins 7 increases sequentially from the front end to the rear end of the nozzle 1. The high-temperature area at the front end enhances air convection heat dissipation through a larger fin area and improves the heat dissipation effect on the nozzle 1.

[0045] Example 3:

[0046] Based on the above embodiment 1, in order to improve the strength of the shield 9, the shield 9 will be made of the following materials.

[0047] See Figures 1-4 The shield 9 is made of titanium alloy (TC4) to improve the corrosion resistance of the shield 9 (resistance to solvent and water vapor corrosion in the spraying environment), and titanium alloy has high strength.

[0048] The working principle of this utility model is as follows: First, the operator connects the nozzle to the spraying equipment through the first threaded connector 3, and connects the cooling pipe 4 to the circulating cooling system through the connector 8; install the baffle 9 and ensure that the conical ring 12 is coaxial with the nozzle 2;

[0049] During operation, the spraying equipment works, the paint is sprayed out through the nozzle 1, and at the same time the coolant begins to circulate. Cold water enters the cooling pipe 4 through the inlet pipe 5 and flows inside the cooling pipe 4. After absorbing heat, the cold water can flow out through the outlet pipe 6 to dissipate heat from the nozzle 1. It also works in conjunction with the heat dissipation fins 7 to provide synchronous auxiliary heat dissipation.

[0050] The water mist that is sprayed out by the nozzle 1 is blocked by the baffle 9, which prevents most of the water mist from contacting the heat dissipation fins 7, reduces the amount of paint adhering to the surface of the heat dissipation fins 7, and reduces the frequency of cleaning the surface of the heat dissipation fins 7. When the water mist generated by the spraying spreads to the inner wall of the baffle 9, the spiral guide groove will guide the airflow to drive the water mist to flow spirally along the groove, which will reduce the escape of water mist towards the heat dissipation fins 7, and at the same time reduce the impact turbulence between the water mist and the inner wall of the baffle 9, and avoid secondary diffusion caused by airflow turbulence.

[0051] After long-term use, a small amount of paint will inevitably adhere to the inner wall of the baffle 9. The detachable structure allows operators to directly remove the baffle 9 for separate cleaning (such as wiping or rinsing) without disassembling the entire nozzle 1 or heat dissipation fins 7.

[0052] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A spray nozzle for metal spraying, comprising a nozzle (1), characterized in that: The nozzle (1) has a nozzle opening (2) at the top end. Multiple heat dissipation fins (7) are installed on the outer wall of the nozzle (1). An internal threaded ring (10) is fixed on the upper part of the outer wall of the nozzle (1). The internal threaded ring (10) is connected to a second threaded connector (13) by its internal thread. A baffle (9) is installed at the end of the second threaded connector (13). A spiral guide groove (11) is provided on the inner wall of the baffle (9). A conical ring (12) is installed on the outer wall of the baffle (9).

2. The spray nozzle for metal spraying according to claim 1, characterized in that: The nozzle (1) is provided with a cooling pipe (4) inside, and the water inlet end of the cooling pipe (4) is connected to a liquid inlet pipe (5) extending to the outside of the nozzle (1).

3. The spray nozzle for metal spraying according to claim 2, characterized in that: The outlet end of the cooling pipe (4) is connected to an outlet pipe (6) that extends to the outside of the nozzle (1).

4. The spray nozzle for metal spraying according to claim 3, characterized in that: A connector (8) is installed at one end of the outlet pipe (6) and one end of the inlet pipe (5).

5. A spray nozzle for metal spraying according to claim 1, characterized in that: The nozzle (1) is fitted with a first threaded connector (3) at its bottom end.

6. A spray nozzle for metal spraying according to claim 1, characterized in that: The shield (9) is detachably connected to the internal threaded ring (10) via the second threaded joint (13).

7. A spray nozzle for metal spraying according to claim 1, characterized in that: The diameter of the plurality of heat dissipation fins (7) increases sequentially from the front end to the rear end of the nozzle (1).

8. A spray nozzle for metal spraying according to claim 1, characterized in that: The nozzle (1) is made of tungsten carbide alloy material.

9. A spray nozzle for metal spraying according to claim 1, characterized in that: The shield (9) is made of titanium alloy (TC4) material.

10. A spray nozzle for metal spraying according to claim 1, characterized in that: The baffle (9) and the conical ring (12) are integrally formed.

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