Powder mixing vacuum cold spraying nozzle

Abstract

The utility model provides a powder mixing vacuum cold spraying nozzle which comprises a nozzle body, a high-pressure gas inlet connector is arranged on one side of the nozzle body, an aerosol gas powder feeding connector is arranged on the other side of the nozzle body, and a pressure monitoring connector is arranged at the top of the nozzle body. And a mixed gas cavity channel is formed in the nozzle body. One side of a mold core channel is machined by a drill bit with a chamfer, the chamfer is formed, passing gas can be shrunk, the speed is increased to subsonic speed, an opening in the other side of the mold core channel is a horn opening and serves as an expansion acceleration section, and when the shrunk gas passes through the opening, the speed can be increased to supersonic speed due to the change of the hole diameter of a pipeline, so that the speed is increased to subsonic speed. According to the nozzle interchange mold core device, the nozzle interchange mold core can be detached by rotating the hexagonal screw head when facing different processes, and the nozzle interchange mold core of the mold core channel required by the process is replaced, so that the applicability of the device is improved.

Description

Technical Field

[0001] This utility model is a powder mixing vacuum cold spray nozzle, belonging to the field of cold spray equipment. Background Technology

[0002] As is well known, ceramic materials typically require sintering at high temperatures, usually above 1000°C. This precludes coatings on low-melting-point substrate materials such as metals, glass, and polymers, which have dense porous or thick ceramic films. Furthermore, the decomposition or uncontrolled volatilization of ceramic components can occur at high temperatures. As an alternative, aerosol deposition (AD) is a spraying process that can produce dense nanocrystalline ceramic films directly from initial bulk powder on virtually any substrate at room temperature without sintering. In aerosol spraying, a powder-mixing vacuum cold spray nozzle is used to spray the aerosol, which is achieved by expelling the aerosol through the nozzle channel under high pressure. The powder-mixing vacuum cold spray nozzle is an essential piece of equipment in the cold spraying process.

[0003] However, in the existing technology, the nozzle mold core on the powder mixing vacuum cold spray nozzle is fixedly installed and cannot be replaced. This results in the need to replace different models of nozzles for different processes, thereby reducing the applicability of the device. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a powder mixing vacuum cold spray nozzle to solve the problems mentioned in the background. When dealing with different processes, the nozzle interchangeable mold core can be disassembled by rotating the hexagonal screw head to replace the nozzle interchangeable mold core with the mold core channel required by the process, thereby improving the applicability of the device.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a powder mixing vacuum cold spray nozzle, comprising a nozzle body, a high-pressure gas inlet connector on one side of the nozzle body, an aerosol gas powder delivery connector on the other side of the nozzle body, a pressure monitoring connector on the top of the nozzle body, a mixing gas cavity inside the nozzle body, and an interface cavity on the inner wall of the mixing gas cavity.

[0006] A mold core mounting groove is provided on one side of the nozzle body. A threaded groove is provided on the inner wall of the mold core mounting groove. A mold core assembly is provided inside the mold core mounting groove. An inclined aperture cavity is provided on the inner wall of the mixed gas cavity. A small aperture cavity is provided on the inner wall of the inclined aperture cavity. A sealing component is provided inside the small aperture cavity.

[0007] Furthermore, the mold core component includes a nozzle interchangeable mold core, the nozzle interchangeable mold core having a mold core channel inside, and the outer wall of the nozzle interchangeable mold core having threads, the threads being threadedly connected to a threaded groove.

[0008] Furthermore, the mixed gas cavity is connected to the mold core mounting groove, and one end of the nozzle interchangeable mold core is fixedly connected to a hexagonal screw head.

[0009] Furthermore, a sealing ring is fixedly connected to the other end of the nozzle interchangeable mold core, and the sealing ring has a "ring" shaped structure.

[0010] Furthermore, the sealing component includes a sealing tube, which is threaded into the interior of a small-diameter cavity. A filter screen is fixedly connected to the inner wall of the sealing tube, a spring is fixedly connected to one side of the filter screen, and a sealing plug is fixedly connected to one end of the spring.

[0011] Furthermore, the sealing plug is shaped like a frustum, and the diameter of the end of the sealing plug near the oblique aperture cavity is larger than the diameter of the end of the sealing plug away from the oblique aperture cavity.

[0012] Furthermore, a sealing element is fixedly connected to one end of the sealing tube, and a sealing gasket is fixedly connected to one side of the sealing plug.

[0013] The beneficial effects of this utility model are:

[0014] 1. The die core channel is machined with a chamfered drill bit on one side. The chamfered feature causes the passing gas to contract, increasing its speed to subsonic. The opening on the other side of the die core channel is a horn opening, which serves as an expansion and acceleration section. When the contracting gas passes through this section, due to the change in the pipe diameter, its speed can be increased to supersonic, giving the powder in the gas supersonic kinetic energy. For different processes, the nozzle interchange die core can be disassembled by rotating the hexagonal screwdriver to replace the nozzle interchange die core required for the process, thereby improving the applicability of the device.

[0015] 2. When the mixed gas cavity needs to be cleaned, the sealing pipe is connected to the external cleaning pipe. After the fluid enters the sealing pipe, its pressure will drive the sealing plug to move into the oblique aperture cavity. As a result, there is a gap between the sealing plug and the oblique aperture cavity, and the fluid can enter the interior of the mixed gas cavity, thereby cleaning the interior of the mixed gas cavity. This further meets the working requirements of the device and improves its practicality. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a powder mixing vacuum cold spray nozzle according to the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the nozzle body in this utility model;

[0019] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;

[0020] Figure 4 This is a top sectional view of the nozzle body in this utility model;

[0021] Figure 5 This is a front sectional view of the nozzle interchangeable mold core in this utility model.

[0022] In the diagram: 1. Pressure monitoring connector; 2. High-pressure gas inlet connector; 3. Aerosol gas powder delivery connector; 4. Nozzle interchangeable mold core; 41. Hexagonal screw head; 42. Sealing ring; 43. Thread; 44. Thread groove; 45. Mold core mounting groove; 46. Mold core channel; 5. Nozzle body; 51. Mixed gas cavity; 52. Interface cavity; 53. Slanted aperture cavity; 54. Small aperture cavity; 6. Sealing tube; 61. Seal; 62. Filter screen; 63. Spring; 64. Sealing plug; 65. Sealing gasket. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Please see Figures 1-5 This utility model provides a technical solution: a powder mixing vacuum cold spray nozzle, including a nozzle body 5, a high-pressure gas inlet connector 2 on one side of the nozzle body 5, an aerosol gas powder delivery connector 3 on the other side of the nozzle body 5, a pressure monitoring connector 1 on the top of the nozzle body 5, a mixing gas channel 51 inside the nozzle body 5, and an interface channel 52 on the inner wall of the mixing gas channel 51. The number of interface channels 52 is three, and the three interface channels 52 are respectively connected to the pressure monitoring connector 1, the high-pressure gas inlet connector 2 and the aerosol gas powder delivery connector 3. The pressure monitoring connector 1 is connected to a pressure transmitter, which can monitor the pressure of the input gas flowing in the mixing gas channel 51 in real time. The high-pressure gas inlet connector 2 is connected to a high-pressure gas carrier, and the aerosol gas powder delivery connector 3 is connected to an aerosol delivery pipeline, thereby enabling the delivery of aerosol.

[0025] Please see Figures 1-5A mold core mounting groove 45 is provided on one side of the nozzle body 5. A screw groove 44 is provided on the inner wall of the mold core mounting groove 45. A mold core assembly is provided inside the mold core mounting groove 45. An inclined aperture cavity 53 is provided on the inner wall of the mixed gas cavity 51. A small aperture cavity 54 is provided on the inner wall of the inclined aperture cavity 53. A sealing component is provided inside the small aperture cavity 54.

[0026] Please see Figures 1-5 The mold core component includes a nozzle interchangeable mold core 4. The nozzle interchangeable mold core 4 has an internal mold core channel 46 and an external thread 43. The thread 43 is threaded into a threaded groove 44. The mixed gas cavity 51 communicates with the mold core mounting groove 45. One end of the nozzle interchangeable mold core 4 is fixedly connected to a hexagonal screw head 41, and the other end is fixedly connected to a sealing ring 42. The sealing ring 42 has a circular ring structure. The hexagonal screw head 41 remains on the outside of the nozzle body 5. When installed at the nozzle main housing interface, it can... Tighten the nozzle interchangeable mold core 4 by rotating it, press one end of the nozzle interchangeable mold core 4 onto the inner wall of the mold core mounting groove 45, and attach the sealing ring 42 to ensure sealing. One side of the mold core channel 46 is machined with a chamfered drill bit. The chamfered feature can cause the passing gas to contract and increase its speed to subsonic speed. The opening on the other side of the mold core channel 46 is a horn opening, which serves as an expansion acceleration section. When the contracted gas passes through this section, due to the change in the pipe diameter, its speed can be increased to supersonic speed, giving the powder in the gas the kinetic energy to reach supersonic speed.

[0027] Please see Figures 1-3 The sealing component includes a sealing tube 6, the outer wall of which is threaded, and the inner wall of the small-diameter cavity 54 is threaded. The sealing tube 6 is threaded into the inside of the small-diameter cavity 54. A filter screen plate 62 is fixedly connected to the inner wall of the sealing tube 6. A spring 63 is fixedly connected to one side of the filter screen plate 62. A sealing plug 64 is fixedly connected to one end of the spring 63. The sealing plug 64 is shaped like a frustum, and the diameter of the end of the sealing plug 64 near the oblique-diameter cavity 53 is larger than the diameter of the end of the sealing plug 64 away from the oblique-diameter cavity 53. A sealing element 61 is fixedly connected to one end of the sealing tube 6, and a sealing gasket 65 is fixedly connected to one side of the sealing plug 64. When the device is used for spraying, the air pressure inside the mixed gas cavity 51 will cause the sealing plug 64 to move towards the small-diameter cavity 54, thereby sealing the small-diameter cavity 54 on one side of the sealing plug 64, and thus preventing the aerosol from being discharged through the sealing tube 6.

[0028] In use, the three interface cavities 52 are respectively connected to the pressure monitoring connector 1, the high-pressure gas inlet connector 2, and the aerosol gas powder delivery connector 3. The pressure monitoring connector 1 is connected to the pressure transmitter, which can monitor the pressure of the input gas flowing in the mixed gas cavity 51 in real time. The high-pressure gas inlet connector 2 is connected to the high-pressure gas carrier, and the aerosol gas powder delivery connector 3 is connected to the aerosol delivery pipeline, which can then deliver the aerosol.

[0029] When the device is spraying, the air pressure inside the mixed gas channel 51 will cause the sealing plug 64 to move towards the small aperture channel 54, and then one side of the sealing plug 64 will seal the small aperture channel 54, so that the aerosol will not be discharged through the sealing tube 6.

[0030] One side of the core channel 46 is machined with a chamfered drill bit. The chamfered feature can cause the passing gas to contract and increase its speed to subsonic speed. The opening on the other side of the core channel 46 is a horn opening, which serves as an expansion acceleration section. When the contracting gas passes through this section, due to the change in the pipe diameter, its speed can be increased to supersonic speed, giving the powder in the gas supersonic kinetic energy. When facing different processes, the nozzle interchangeable core 4 can be disassembled by rotating the hexagonal screw head 41 and the nozzle interchangeable core 4 of the core channel 46 required for the process can be replaced, thereby improving the applicability of the device.

[0031] When the mixed gas cavity 51 needs to be cleaned, the sealing pipe 6 is connected to the external cleaning pipe. After the fluid enters the sealing pipe 6, its pressure will drive the sealing plug 64 to move into the oblique aperture cavity 53. As a result, there is a gap between the sealing plug 64 and the oblique aperture cavity 53, and the fluid can enter the interior of the mixed gas cavity 51, thereby achieving the cleaning of the interior of the mixed gas cavity 51.

[0032] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A powder mixing vacuum cold spray nozzle comprising a nozzle body (5) characterized in that: One side of the nozzle body (5) is provided with a high-pressure gas inlet joint (2), the other side of the nozzle body (5) is provided with an aerosol gas powder feeding joint (3), the top of the nozzle body (5) is provided with a pressure monitoring joint (1), the inside of the nozzle body (5) is provided with a mixed gas cavity (51), and the inner wall of the mixed gas cavity (51) is provided with a joint cavity (52); One side of the nozzle body (5) is provided with a mold core installation groove (45), the inner wall of the mold core installation groove (45) is provided with a screw groove (44), the inside of the mold core installation groove (45) is provided with a mold core assembly, the inner wall of the mixed gas cavity (51) is provided with a bevel hole diameter cavity (53), the inner wall of the bevel hole diameter cavity (53) is provided with a small hole diameter cavity (54), and the inside of the small hole diameter cavity (54) is provided with a sealing part.

2. A powder mixing vacuum cold spray nozzle according to claim 1, wherein: The mold core part comprises a nozzle interchangeable mold core (4), the inside of the nozzle interchangeable mold core (4) is provided with a mold core channel (46), the outer wall of the nozzle interchangeable mold core (4) is provided with a screw thread (43), and the screw thread (43) is threadedly connected with the screw groove (44).

3. A powder mixing vacuum cold spray nozzle according to claim 2, wherein: The mixed gas cavity (51) is communicated with the mold core installation groove (45), and one end of the nozzle interchangeable mold core (4) is fixedly connected with a hexagonal screw head (41).

4. A powder mixing vacuum cold spray nozzle according to claim 2, wherein: The other end of the nozzle interchangeable mold core (4) is fixedly connected with a sealing ring (42), and the sealing ring (42) is a "ring" structure.

5. A powder mixing vacuum cold spray nozzle according to claim 1, wherein: The sealing part comprises a sealing pipe (6), the sealing pipe (6) is threadedly connected in the inside of the small hole diameter cavity (54), the inner wall of the sealing pipe (6) is fixedly connected with a filter screen plate (62), one side of the filter screen plate (62) is fixedly connected with a spring (63), and one end of the spring (63) is fixedly connected with a sealing plug (64).

6. A powder mixing vacuum cold spray nozzle according to claim 5, wherein: The sealing plug (64) is a "truncated cone" structure, and the diameter of one end of the sealing plug (64) close to the bevel hole diameter cavity (53) is greater than that of the other end of the sealing plug (64) away from the bevel hole diameter cavity (53).

7. A powder mixing vacuum cold spray nozzle according to claim 5, wherein: One end of the sealing pipe (6) is fixedly connected with a sealing element (61), and one side of the sealing plug (64) is fixedly connected with a sealing gasket (65).

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