Powder impingement spray apparatus subsonic nozzle

Abstract

The utility model relates to nozzle technical field, concretely relates to a powder impact spraying equipment subsonic nozzle. Including. Outlet nozzle, one end of outlet nozzle axial extension's air outlet, still be equipped with the powder channel on the outlet nozzle, the export of powder channel sets up on the lateral wall of air outlet, air inlet nozzle, be equipped with the air passage on air inlet nozzle, air inlet nozzle is inserted in the one end of outlet nozzle far from air outlet, air outlet is equipped with the air passage on air inlet nozzle, air outlet is coaxial with air outlet and links to each other, the radial dimension of air outlet is greater than air outlet, the export position of powder channel is located in the front side of air outlet air outlet, the included angle of the extension direction of powder channel and air outlet is acute angle, locking piece, locking piece can be dismantled and installed in the one end of locking piece far from air outlet, be equipped with the limiting cavity between locking piece and outlet nozzle, be equipped with the limiting convex part on air inlet nozzle, air inlet nozzle is equipped on locking piece, and limiting convex part is limited in the limiting cavity. Can promote the spraying quality.

Description

Technical Field

[0001] This utility model relates to the field of nozzle technology, specifically to a subsonic nozzle for a powder impact spraying equipment. Background Technology

[0002] Powder impact coating is an advanced surface treatment process widely used in aerospace, automotive manufacturing, petrochemical, and machining industries to improve the wear resistance, corrosion resistance, oxidation resistance, and adhesion of metallic or non-metallic materials. This technology uses a high-speed airflow to accelerate powder materials and propel them onto the substrate surface, forming a coating with high bonding strength. The nozzle, as a key component, directly affects the coating effect; its structural design plays a decisive role in powder acceleration, mixing uniformity, and the performance of the final coating. Currently, traditional powder coating nozzles mostly employ straight-through or simple contraction-expansion structures (such as Laval nozzles), relying on high-pressure gas to propel the powder to high speeds.

[0003] However, existing technologies have the following limitations: conventional nozzles cannot accelerate powder to subsonic speeds, resulting in limited coating adhesion and an inability to achieve molecular bonding level effects. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a subsonic nozzle for a powder impact spraying device, which can improve the spraying quality.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A subsonic nozzle for a powder impact spraying device, comprising:

[0007] The outlet nozzle has an axially extending air outlet at one end. The outlet nozzle is also equipped with a powder channel, and the outlet of the powder channel is located on the side wall of the air outlet.

[0008] An air inlet nozzle is provided with an air passage. The air inlet nozzle is inserted at the end of the outlet nozzle away from the outlet hole. An outlet air passage is provided through the air inlet nozzle. The outlet air passage is coaxially connected to the outlet hole. The radial dimension of the outlet hole is larger than that of the outlet air passage. The outlet position of the powder channel is located in front of the outlet of the outlet air passage. The angle between the extension directions of the powder channel and the outlet air passage is an acute angle.

[0009] The locking component is detachably installed at the end of the locking component away from the air outlet. A limiting cavity is provided between the locking component and the outlet nozzle. A limiting protrusion is provided on the inlet nozzle. The inlet nozzle passes through the locking component, and the limiting protrusion is limited within the limiting cavity. This allows for quick installation and removal of the inlet nozzle, facilitating the replacement of worn outlet nozzles and reducing maintenance costs.

[0010] Furthermore, in this application, the radial dimension of the powder channel in the nozzle is smaller than that of the air outlet, while the radial dimension of the powder channel is larger than that of the air outlet channel. The size of the powder channel is between that of the air outlet channel and the air outlet, ensuring a moderate powder delivery rate and avoiding excessive powder that could lead to airflow deceleration or uneven mixing.

[0011] Furthermore, in this application, the nozzle and the outlet nozzle are integrally provided with a powder inlet pipe, the powder channel is set on the powder inlet pipe, and the outer wall of the powder inlet pipe is provided with a first annular groove to facilitate the fixing of the pipeline.

[0012] Furthermore, in this application, the main body of the intake nozzle is an integral tubular structure and includes, in axial direction, an insertion section, a limiting section, and an extension section. The limiting protrusion is disposed on the limiting section. The insertion section is inserted into the end of the outlet nozzle away from the outlet hole. Corresponding to the insertion section, the outlet nozzle is provided with an installation hole for receiving the insertion section. The extension section passes through the locking member and is provided with a second annular groove. The second annular groove is disposed on the side of the locking member away from the outlet nozzle to facilitate fixing the pipeline.

[0013] Furthermore, in this application, the nozzle locking component has a threaded countersunk hole, which is threadedly connected to the end of the outlet nozzle away from the outlet port. The limiting protrusion is axially limited between the axial end face of the threaded countersunk hole and the end face of the outlet nozzle away from the outlet port. The threaded countersunk hole fits around the limiting protrusion to restrict the axial displacement of the inlet nozzle and is threadedly connected to the outlet nozzle, providing uniform clamping force and ensuring a tight fit between the inlet and outlet nozzles to prevent high-pressure gas leakage. Furthermore, in this application, the nozzle's insertion section extends to form a mounting hole, which is located within the outlet port.

[0014] Furthermore, in this application, the nozzle, the outlet nozzle includes an integrally axially connected main body pipe section and a front end pipe section, a locking member is installed on the end of the main body pipe section away from the front end pipe section, the powder inlet pipe is set on the main body pipe section, and the outer diameter of the front end pipe section is smaller than that of the main body pipe section, so as to reduce the weight of the outlet nozzle body.

[0015] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0016] This invention provides a subsonic nozzle for a powder impact spraying device. Its working principle is as follows: high-pressure gas enters the outlet hole through the inlet nozzle, which can achieve a siphon effect to draw the powder out from the powder channel, so that the powder and high-pressure gas are fully mixed. Since the diameter of the outlet channel is smaller than that of the outlet hole, the gas will be accelerated after passing through the outlet hole, similar to the acceleration effect of a Laval nozzle. The high-pressure gas accelerates the powder to subsonic speed and ejects it, impacting the surface of the workpiece to be sprayed, achieving a molecular bonding effect and having extremely high adhesion, thereby improving the spraying quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a subsonic nozzle for a powder impact spraying device according to an embodiment of this application;

[0018] Figure 2 This is a cross-sectional view of a subsonic nozzle of a powder impact spraying device according to an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the outlet nozzle structure;

[0020] Figure 4 This is a schematic diagram of the intake nozzle structure;

[0021] Figure 5 This is a cross-sectional view of the locking component.

[0022] In the diagram: 1-Outlet nozzle; 11-Air outlet; 12-Powder channel; 13-Powder inlet pipe; 131-First annular groove; 14-Mounting hole; 15-Main pipe section; 16-Front end pipe section; 2-Air inlet nozzle; 20-Air outlet channel; 21-Limiting protrusion; 22-Insertion section; 23-Limiting section; 24-Extension section; 241-Second annular groove; 3-Locking element; 30-Limiting cavity; 31-Threaded countersunk hole. Detailed Implementation

[0023] Example

[0024] Combination Figures 1 to 2 The powder impact spraying equipment shown includes a subsonic nozzle.

[0025] Figure 3 The outlet nozzle 1 shown has an air outlet 11 extending axially from one end. The outlet nozzle 1 is also provided with a powder channel 12, and the outlet of the powder channel 12 is located on the side wall of the air outlet 11.

[0026] Figure 4 The air inlet nozzle 2 shown has an air passage. The air inlet nozzle 2 is inserted at the end of the outlet nozzle 1 away from the outlet hole 11. The air outlet nozzle 2 has an outlet air passage 20 passing through it. The outlet air passage 20 is coaxially connected to the outlet hole 11. The radial dimension of the outlet hole 11 is larger than that of the outlet air passage 20. The outlet position of the powder channel 12 is located in front of the outlet of the outlet air passage 20. The angle between the extension directions of the powder channel 12 and the outlet air passage 20 is an acute angle.

[0027] Figure 5 The locking component 3 shown is detachably installed at the end of the locking component 3 away from the air outlet 11. A limiting cavity 30 is provided between the locking component 3 and the outlet nozzle 1. A limiting protrusion 21 is provided on the air inlet nozzle 2, which passes through the locking component 3, and the limiting protrusion 21 is limited within the limiting cavity 30. This allows the air inlet nozzle 2 to be quickly disassembled and assembled, facilitating the replacement of worn outlet nozzle 1 and reducing maintenance costs.

[0028] Based on the above-mentioned device, the working principle of the subsonic nozzle of the powder impact spraying equipment in this application is as follows: high-pressure gas enters the outlet hole 11 through the inlet nozzle 2, which can realize the siphon effect to draw the powder out from the powder channel 12, so that the powder and high-pressure gas are fully mixed. Since the aperture of the outlet channel 20 is smaller than that of the outlet hole 11, the gas will be accelerated after passing through the outlet hole 11, similar to the Laval nozzle acceleration effect. The high-pressure gas accelerates the powder to subsonic speed and ejects it, impacting the surface of the workpiece to be sprayed, realizing the molecular bonding effect, and having extremely high adhesion, thereby improving the spraying quality.

[0029] Furthermore, in this embodiment, the radial dimension of the powder channel 12 is smaller than that of the air outlet 11, while the radial dimension of the powder channel 12 is larger than that of the air outlet channel 20. The size of the powder channel 12 is between that of the air outlet channel 20 and the air outlet 11, ensuring a moderate powder delivery amount and avoiding excessive powder that could cause airflow deceleration or uneven mixing.

[0030] Furthermore, in this embodiment, the nozzle and the outlet nozzle 1 are integrally provided with a powder inlet pipe 13, and the powder channel 12 is provided on the powder inlet pipe 13. The outer wall of the powder inlet pipe 13 is provided with a first annular groove 131 to facilitate the fixing of the pipeline.

[0031] Furthermore, in this embodiment, the main body of the air intake nozzle 2 is an integral tubular shape and includes, in the axial direction, an insertion section 22, a limiting section 23, and an extension section 24. The limiting protrusion 21 is provided on the limiting section 23. The insertion section 22 is inserted into the end of the outlet nozzle 1 away from the air outlet 11. Corresponding to the insertion section 22, the outlet nozzle 1 is provided with an installation hole 14 for receiving the insertion section 22. The extension section 24 passes through the locking member 3. The extension section 24 is provided with a second annular groove 241. The second annular groove 241 is provided on the side of the locking member 3 away from the outlet nozzle 1 to facilitate fixing the pipeline.

[0032] Furthermore, in this embodiment, the nozzle and locking member 3 are provided with a threaded countersunk hole 31. The threaded countersunk hole 31 is threadedly connected to the end of the outlet nozzle 1 away from the air outlet 11. The limiting protrusion 21 is axially limited between the axial end face of the threaded countersunk hole 31 and the end face of the outlet nozzle 1 away from the air outlet 11. The threaded countersunk hole 31 fits around the limiting protrusion 21 to limit the axial displacement of the inlet nozzle 2, and is threadedly connected to the outlet nozzle 1, which can provide uniform clamping force to ensure that the inlet nozzle 2 and the outlet nozzle 1 are tightly fitted, preventing high-pressure gas leakage. Specifically, the outer wall of the locking member 3 is provided with anti-slip texture.

[0033] Furthermore, in this embodiment, the nozzle has a mounting hole 14 extending from the front end of the insertion section 22 and is disposed within the air outlet 11.

[0034] Furthermore, in this embodiment, the nozzle, the outlet nozzle 1, includes an integrally axially connected main body pipe section 15 and a front end pipe section 16. The locking member 3 is installed at the end of the main body pipe section 15 away from the front end pipe section 16. The powder inlet pipe 13 is set on the main body pipe section 15. The outer diameter of the front end pipe section 16 is smaller than that of the main body pipe section 15, so as to reduce the weight of the main body of the outlet nozzle 1.

[0035] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A subsonic nozzle for a powder impact spraying device, characterized in that: include: An outlet nozzle (1) has an air outlet (11) extending axially from one end of the outlet nozzle (1). The outlet nozzle (1) is also provided with a powder channel (12), and the outlet of the powder channel (12) is located on the side wall of the air outlet (11). An air inlet nozzle (2) is provided with an air passage. The air inlet nozzle (2) is inserted at the end of the outlet nozzle (1) away from the outlet hole (11). An outlet air passage (20) is provided on the air inlet nozzle (2). The outlet air passage (20) is coaxially connected with the outlet hole (11). The radial dimension of the outlet hole (11) is larger than that of the outlet air passage (20). The outlet position of the powder channel (12) is located in front of the outlet of the outlet air passage (20). The angle between the extension directions of the powder channel (12) and the outlet air passage (20) is an acute angle. The locking member (3) is detachably installed at the end of the locking member (3) away from the air outlet (11). A limiting cavity (30) is provided between the locking member (3) and the outlet nozzle (1). A limiting protrusion (21) is provided on the air inlet nozzle (2). The air inlet nozzle (2) passes through the locking member (3), and the limiting protrusion (21) is limited within the limiting cavity (30).

2. The subsonic nozzle of a powder impact spraying equipment according to claim 1, characterized in that: The radial dimension of the powder channel (12) is smaller than the radial dimension of the air outlet (11), and the radial dimension of the powder channel (12) is larger than the radial dimension of the air outlet channel (20).

3. The subsonic nozzle of a powder impact spraying equipment according to claim 1, characterized in that: The outlet nozzle (1) is integrally provided with a powder inlet pipe (13), the powder channel (12) is provided on the powder inlet pipe (13), and the outer wall of the powder inlet pipe (13) is provided with a first annular groove (131).

4. The subsonic nozzle of a powder impact spraying equipment according to claim 1, characterized in that: The main body of the air intake nozzle (2) is an integral tubular structure and includes an insertion section (22), a limiting section (23) and an extension section (24) in sequence along the axial direction. The limiting protrusion (21) is provided on the limiting section (23). The insertion section (22) is inserted into the end of the outlet nozzle (1) away from the air outlet (11). Corresponding to the insertion section (22), the outlet nozzle (1) is provided with an installation hole (14) for receiving the insertion section (22). The extension section (24) is inserted into the locking member (3). The extension section (24) is provided with a second annular groove (241). The second annular groove (241) is provided on the side of the locking member (3) away from the outlet nozzle (1).

5. The subsonic nozzle of a powder impact spraying equipment according to claim 4, characterized in that: The locking member (3) is provided with a threaded countersunk hole (31), which is threadedly connected to the end of the outlet nozzle (1) away from the air outlet (11). The limiting protrusion (21) is axially limited between the axial end face of the threaded countersunk hole (31) and the end face of the outlet nozzle (1) away from the air outlet (11).

6. The subsonic nozzle of a powder impact spraying equipment according to claim 4, characterized in that: The front end of the insertion section (22) extends out of the mounting hole (14) and is located inside the air outlet (11).

7. The subsonic nozzle of a powder impact spraying equipment according to claim 3, characterized in that: The outlet nozzle (1) includes an integrally axially connected main pipe section (15) and a front end pipe section (16). A locking member (3) is installed at the end of the main pipe section (15) away from the front end pipe section (16). The powder inlet pipe (13) is set on the main pipe section (15). The outer diameter of the front end pipe section (16) is smaller than that of the main pipe section (15).

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