Connecting structure of powder feeding pipe mechanism and spray gun shell

Abstract

The utility model relates to the technical field of electrostatic powder spray guns, in particular to a connecting structure of a powder feeding pipe mechanism and a spray gun shell, and the connecting structure of the powder feeding pipe mechanism and the spray gun shell comprises a shell; the powder feeding pipe mechanism is arranged in the shell; wherein a first limiting structure is arranged on the peripheral wall of the powder feeding pipe mechanism, a first supporting limiting structure is arranged at the corresponding position of the inner wall of the shell, the first supporting limiting structure comprises a plurality of first supporting strips, first arc-shaped indents are formed in the side edges of the first supporting strips, and at least part of the powder feeding pipe mechanism is attached to the first arc-shaped indents; a first limiting groove is formed in the first arc-shaped concave part, and the first limiting groove is matched with the first limiting structure to be used for limiting displacement of the powder feeding pipe mechanism; by means of the arrangement, the first supporting strip can better support and fix the powder feeding pipe mechanism, vibration generated in the working process of the spray gun is reduced, and therefore the vibration sense and noise are reduced, and abrasion between the powder feeding pipe mechanism and the gun body shell is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of electrostatic powder spray gun technology, and in particular to a connection structure between a powder feeding tube mechanism and a spray gun housing. Background Technology

[0002] An electrostatic powder spray gun is a device that uses the principle of electrostatics to spray powder coatings. It is widely used in metal surface treatment, such as in the home appliance, automotive, and furniture industries. When an electrostatic powder spray gun is working, the coating sprayed through the gun disperses the powder particles, making them negatively charged. These charged powder particles are then attracted to the grounded substrate by the airflow and electrostatic attraction, and then heated to melt and solidify into a film.

[0003] The utility model patent with patent number 201922401093X discloses an electrostatic spray gun for anti-clogging spraying equipment, including a gun body shell. Inside the gun body shell, there are nozzle mechanism, flow tube mechanism, high pressure mechanism and cable mechanism respectively. The bottom end of the flow tube mechanism is provided with a handle air connector. This patent solves the problem of easy clogging inside the spray gun.

[0004] When the spray gun is sprayed with high-pressure airflow and paint, it will generate high-frequency vibration. When the spray gun in the above patent is used, the nozzle mechanism is prone to a certain degree of shaking in the gun body shell, which will affect the spraying effect. Utility Model Content

[0005] In view of the shortcomings or problems existing in the prior art, this disclosure provides a connection structure between the powder feeding pipe mechanism and the spray gun housing with a stable structure.

[0006] The technical solution adopted by this disclosure to solve the above-mentioned technical problem is: a connection structure between a powder feeding pipe mechanism and a spray gun housing, comprising:

[0007] case;

[0008] and the powder delivery pipe mechanism located inside the housing;

[0009] The outer peripheral wall of the powder feeding pipe mechanism is provided with a first limiting structure, and the corresponding position of the inner wall of the housing is provided with a first supporting limiting structure. The first supporting limiting structure includes a plurality of first supporting bars, and the side of the first supporting bar is provided with a first arc-shaped concave. The powder feeding pipe mechanism is at least partially in contact with the first arc-shaped concave. The first arc-shaped concave is provided with a first limiting groove. The first limiting groove and the first limiting structure cooperate to limit the displacement of the powder feeding pipe mechanism.

[0010] In a preferred embodiment, the powder delivery pipe mechanism includes an air supply pipe and a powder spraying pipe that are interconnected. A fan is installed in the air supply pipe, which is used to deliver the airflow generated by the fan to the powder spraying pipe. The first limiting structure is installed on the outer peripheral wall of the air supply pipe.

[0011] In a preferred embodiment, the first limiting structure includes two parallel arc-shaped protrusions, with a first protruding ridge between the two arc-shaped protrusions. The first protruding ridge is perpendicular to the arc-shaped protrusions and cooperates with the first limiting groove to limit the displacement of the air supply duct in the first direction. A plurality of first support bars are arranged in parallel and spaced apart. The plurality of first support bars include two end support bars located at both ends. The outer sides of the two arc-shaped protrusions respectively contact the inner sides of the two end support bars to limit the displacement of the air supply duct in the second direction. The first direction is perpendicular to the second direction.

[0012] In a preferred embodiment, the outer peripheral wall of the air supply duct is further provided with a second limiting structure, and a second supporting limiting structure is provided at a corresponding position on the inner wall of the shell. The second limiting structure and the second supporting limiting structure cooperate to restrict the displacement of the air supply duct.

[0013] In a preferred embodiment, the second limiting structure is a second protruding rib arranged along the length of the air supply duct, the second supporting limiting structure is a second supporting strip, the side of the second supporting strip is provided with a second arc-shaped concave, the air supply duct is at least partially in contact with the second arc-shaped concave, the second arc-shaped concave is provided with a second limiting groove, the second limiting groove and the second protruding rib cooperate to limit the displacement of the air supply duct in the first direction.

[0014] In a preferred embodiment, the powder spraying pipe includes a first powder conveying pipe and a second powder conveying pipe, with both ends of the first powder conveying pipe being detachably connected to the air supply pipe and the second powder conveying pipe, respectively.

[0015] In a preferred embodiment, the first powder conveying pipe is a three-way structure, which includes a first pipe body and a second pipe body arranged vertically. The first pipe body and the second pipe body are interconnected. The first pipe body includes a first pipe interface and a second pipe interface. The first pipe interface is connected to the air supply pipe, and the second pipe interface is connected to the second powder conveying pipe. The second pipe body is used to connect to the powder conveying mechanism.

[0016] In a preferred embodiment, the first pipe body is inserted into the air supply duct, a first limiting block is provided on the outer peripheral wall of the first pipe interface, a first groove is provided at the opening of the air supply duct, and the first limiting block is at least partially located in the first groove.

[0017] In a preferred embodiment, the first tube body is inserted into the second powder conveying tube, a second limiting block is provided on the outer peripheral wall of the second tube interface, a second groove is provided at the opening of the second powder conveying tube, and the second limiting block is at least partially located in the second groove.

[0018] In a preferred embodiment, a third support and limiting structure is provided on the inner wall of the shell, which is used to prevent the first powder conveying pipe from shaking.

[0019] In a preferred embodiment, the inner wall of the shell is further provided with a fourth support limiting structure, which is a third support bar. The inner side of the third support bar is provided with a third arc-shaped concave, and the second powder conveying pipe is at least partially in contact with the third arc-shaped concave.

[0020] Compared with existing products, the powder feeding tube mechanism is at least partially fitted with the first arc-shaped concave part. This design enhances the fit between the powder feeding tube mechanism and the first support strip, allowing the first support strip to provide better support and fixation for the powder feeding tube mechanism, reducing vibration generated during spray gun operation, thereby reducing vibration and noise, and minimizing wear between the powder feeding tube mechanism and the gun body shell. The cooperation between the first limiting groove and the first limiting structure further confines the powder feeding tube mechanism inside the shell, preventing it from moving arbitrarily during operation, improving the stability and reliability of the entire spray gun, and thus ensuring the spraying effect. Attached Figure Description

[0021] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 This is one of the structural schematic diagrams of the first shell of this disclosure;

[0023] Figure 2 This is the second schematic diagram of the structure of the first shell disclosed herein;

[0024] Figure 3 This is a schematic diagram of the structure of the second shell of this disclosure;

[0025] Figure 4 This is a schematic diagram of the powder feeding pipe mechanism disclosed in this publication;

[0026] Figure 5 This is a schematic diagram of the structure of the second powder conveying pipe disclosed herein;

[0027] Figure 6 This is a schematic diagram of the structure of the first powder conveying pipe disclosed herein;

[0028] Figure 7 This is a schematic diagram of the structure of the air supply duct disclosed in this publication.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. First housing; 2. Second housing; 3. First support bar; 5. First arc-shaped concave section; 6. First limiting groove; 7. Arc-shaped convex section; 8. First convex ridge; 9. Second support bar; 10. Second arc-shaped concave section; 11. Second limiting groove; 12. First protrusion; 13. Third support bar; 14. Third arc-shaped concave section; 15. Second convex ridge; 16. First powder conveying pipe; 17. Second powder conveying pipe; 18. First pipe body; 19. First pipe interface; 20. Second pipe body; 21. Second pipe interface; 22. First limiting block; 23. First groove; 24. Second limiting block; 25. Second groove; 100. Air supply duct; 200. Powder spraying duct. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0032] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0033] Please refer to Figures 1-4 As shown, this application provides a connection structure between a powder feeding pipe mechanism and a spray gun housing, including a housing and a powder feeding pipe mechanism disposed within the housing. The outer peripheral wall of the powder feeding pipe mechanism has two symmetrically arranged first limiting structures, and a corresponding first support limiting structure is provided on the inner wall of the housing. Each first support limiting structure includes multiple first support bars 3, and the sides of each first support bar 3 have first arc-shaped recesses 5. The powder feeding pipe mechanism is at least partially in contact with the first arc-shaped recesses 5. A first limiting groove 6 is provided on the first arc-shaped recesses 5, and the first limiting groove 6 cooperates with the first limiting structure to restrict displacement of the powder feeding pipe mechanism. The first arc-shaped recesses 5 on the multiple first support bars 3 are in contact with the powder feeding pipe mechanism, providing stable support. The first limiting groove 6 cooperates with the first limiting structure to securely limit the powder feeding pipe mechanism within the housing. This effectively restricts the displacement of the powder feeding pipe mechanism, ensuring its fixed position within the spray gun housing, thereby guaranteeing the stability of the powder feeding and air supply process and achieving a good spraying effect.

[0034] Specifically, the powder delivery pipe mechanism includes an interconnected air supply duct 100 and a powder spraying duct 200. A fan is installed in the air supply duct 100, which delivers the airflow generated by the fan to the powder spraying duct 200. Two first limiting structures are symmetrically arranged on the outer peripheral wall of the air supply duct 100. Specifically, there are three or more first support bars 3. Since the fan is located in the air supply duct 100, it will vibrate during operation, requiring more robust support and fixation. Therefore, multiple first support bars 3 are provided to achieve better fixation.

[0035] Furthermore, the first limiting structure is H-shaped, comprising two parallel arc-shaped protrusions 7, with a first protruding ridge 8 positioned between the two arc-shaped protrusions 7. The first protruding ridge 8 is perpendicular to the arc-shaped protrusions 7, wherein the arc-shaped protrusions 7 extend circumferentially along the air supply duct 100, and their curvature precisely matches the outer contour of the air supply duct 100 to ensure a tight fit. The first protruding ridge 8 extends along the length of the air supply channel. The first protruding ridge 8 cooperates with the first limiting groove 6 to limit the displacement of the air supply duct 100 in the first direction. Multiple first support bars 3 are arranged parallel and spaced apart, including two end support bars located at both ends. The outer sides of the two arc-shaped protrusions 7 respectively contact the inner sides of the two end support bars to limit the displacement of the air supply duct 100 in the second direction, wherein the first direction is perpendicular to the second direction. Specifically, the first direction is perpendicular to the axis of the air supply duct 100, and the second direction is parallel to the axis of the air supply duct 100. This setting achieves the limitation of the air supply duct 100 in two mutually perpendicular directions, ensuring its stability inside the spray gun housing and providing a reliable guarantee for the stable operation of the spray gun.

[0036] It should be noted that the outer peripheral wall of the air supply duct 100 is also symmetrically provided with two second limiting structures, and the corresponding position of the inner wall of the shell is provided with a second supporting limiting structure. The second limiting structures cooperate with the second supporting limiting structures to restrict the displacement of the air supply duct 100. Specifically, the second limiting structure is a second protruding rib 15 provided along the length direction of the air supply duct 100, and the second supporting limiting structure is a second supporting strip 9. The side of the second supporting strip 9 is provided with a second arc-shaped concave 10. The air supply duct 100 is at least partially in contact with the second arc-shaped concave 10, and a second limiting groove 11 is provided on the second arc-shaped concave 10. The second limiting groove 11 cooperates with the second protruding rib 15 to restrict the displacement of the air supply duct 100 in the first direction. This arrangement can further strengthen the fixation of the air supply duct 100 in the first direction, and at the same time, it works together with the first limiting structure to achieve multi-dimensional fixation.

[0037] Since a fan is installed in the air supply duct 100, in order to further reduce the vibration caused by the operation of the fan to the air supply duct 100, a rubber gasket can be installed between the air supply duct 100 and the first arc-shaped concave 5 and / or the second arc-shaped concave 10.

[0038] Please refer to Figures 4-6 As shown, in one embodiment of this disclosure, the powder spraying pipe 200 includes a first powder conveying pipe 16 and a second powder conveying pipe 17. The two ends of the first powder conveying pipe 16 are detachably connected to the air supply pipe 100 and the second powder conveying pipe 17, respectively. The detachable modular design of the first powder conveying pipe 16, the second powder conveying pipe 17, and the air supply pipe 100 facilitates maintenance, replacement, and cleaning. Specifically, the first powder conveying pipe 16 has a three-way structure, including a vertically arranged first pipe body 18 and a second pipe body 20. The first pipe body 18 and the second pipe body 20 are interconnected. The first pipe body 18 includes a first pipe interface 19 and a second pipe interface 21. The first pipe interface 19 is connected to the air supply pipe 100, and the second pipe interface 21 is connected to the second powder conveying pipe 17. The second pipe body 20 is used to connect to the powder conveying mechanism. It is understandable that the diameter of the first pipe interface 19 is matched with the diameter of the air supply duct 100, and the diameter of the second pipe interface 21 is matched with the diameter of the second powder conveying pipe 17, to ensure that there is no leakage between the airflow and the powder mixture during transmission.

[0039] Specifically, such as Figures 4-7 As shown, the first pipe body 18 is inserted into the air supply duct 100. Two first limiting blocks 22 are symmetrically arranged on the outer peripheral wall of the first pipe interface 19. Two first grooves 23, matching the shape of the first limiting blocks 22, are symmetrically arranged at the opening of the air supply duct 100. The first limiting blocks 22 are at least partially located within the first grooves 23. More specifically, the diameter of the first pipe interface 19 is smaller than the diameter of the connecting end of the air supply duct 100, and the outer diameter of the first pipe interface 19 matches the inner diameter of the connecting end of the air supply duct 100. When the first pipe body 18 is inserted into the air supply duct 100, the operator only needs to align the first limiting blocks 22 with the first grooves 23 and push them axially until the first limiting blocks 22 and the first grooves 23 are completely engaged. At this point, a portion of the first limiting blocks 22 is embedded in the first grooves 23, forming a mechanical limit. In this embodiment, the plug-in connection structure not only simplifies the assembly process and improves installation efficiency, but also ensures that the tight fit between the first limiting block 22 and the first groove 23 can effectively resist the circumferential impact force generated by the airflow when the spray gun is working. This ensures that the first tube 18 and the air supply duct 100 always maintain a stable connection, avoiding problems such as powder leakage or reduced transmission efficiency caused by loosening, and providing a guarantee for the stability and reliability of the powder spraying operation.

[0040] Specifically, the first pipe body 18 is inserted into the second powder conveying pipe 17. Two second limiting blocks 24 are symmetrically arranged on the outer peripheral wall of the second pipe interface 21. Two second grooves 25, matching the shape of the second limiting blocks 24, are symmetrically arranged at the opening of the second powder conveying pipe 17. At least partially, the second limiting blocks 24 are located within the second grooves 25. More specifically, the diameter of the first pipe interface 19 is smaller than the diameter of the connecting end of the second powder conveying pipe 17, and the outer diameter of the first pipe interface 19 matches the inner diameter of the connecting end of the second powder conveying pipe 17. In this embodiment, the plug-in connection structure not only simplifies the assembly process and improves installation efficiency, but also, during spray gun operation, the tight fit between the first limiting block 22 and the first groove 23 effectively resists the circumferential impact force generated by airflow, ensuring a stable connection between the first pipe body 18 and the second powder conveying pipe 17. In particular, the second powder conveying pipe 17 and the air supply pipe 100 are located at opposite ends of the first powder conveying pipe 16, providing axial restraint and further improving the stability and reliability of the spray gun operation.

[0041] Preferably, the housing in this application includes two housings, a first housing 1 and a second housing 2, connected by bolts. The first housing 1 and the second housing 2 are assembled together to form the spray gun housing of this application. The split structure design not only facilitates the installation and disassembly of the internal components of the spray gun, greatly reducing maintenance difficulty and time costs, but also allows for flexible replacement of locally damaged parts according to different spraying process requirements, improving the maintainability and economy of the spray gun.

[0042] Please continue reading. Figures 1-4 , Figure 6 As shown, furthermore, a third support and limiting structure is provided on the inner wall of the shell to prevent the first powder conveying pipe 16 from shaking. Specifically, the third support and limiting structure consists of first protrusions 12 symmetrically arranged on the inner wall of the shell, with the second tube 20 positioned between the two first protrusions 12, and the inner sides of the two first protrusions 12 respectively abutting against the two sides of the second tube 20 to prevent the second tube 20 from shaking left and right. It can be understood that two symmetrically arranged first protrusions 12 are provided on the inner walls of both the first shell 1 and the second shell 2.

[0043] Furthermore, the inner wall of the housing is also provided with a fourth support and limiting structure. The fourth support and limiting structure consists of two third support bars 13 symmetrically arranged on the first housing 1 and the second housing 2. The inner side of the third support bar 13 is provided with a third arc-shaped concave 14 that matches the outer diameter of the second powder conveying pipe 17. The second powder conveying pipe 17 is at least partially in contact with the third arc-shaped concave 14. The two symmetrically arranged third support bars 13, through their inner arc-shaped concave 14, are in contact with the second powder conveying pipe 17, which can simultaneously apply a supporting force to the second powder conveying pipe 17 from both sides, forming a balanced and stable force state. This prevents the second powder conveying pipe 17 from tilting, shaking, or deviating, greatly enhancing its stability within the housing and ensuring the continuity and stability of powder delivery when the spray gun is working.

[0044] like Figures 1-3 As shown, it can be understood that the inner walls of the first shell 1 and the second shell 2 are provided with a first support limiting structure, a second support limiting structure, a third support limiting structure and a fourth support limiting structure, and the corresponding limiting structures are symmetrically arranged. The symmetrical arrangement can apply support force to the powder feeding pipe mechanism from both sides at the same time, forming a balanced and stable force state.

[0045] This application, through the synergistic effect of multi-level limiting, not only provides effective support and constraint for the powder feeding pipe mechanism, but also evenly distributes the force on the powder feeding pipe mechanism, reduces stress concentration, thereby ensuring the stability of the spray gun operation and improving the spraying effect.

[0046] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A connection structure between a powder feeding pipe mechanism and a spray gun housing, characterized in that, include: case; and the powder delivery pipe mechanism located inside the housing; The outer peripheral wall of the powder feeding pipe mechanism is provided with a first limiting structure, and the corresponding position of the inner wall of the shell is provided with a first supporting limiting structure. The first supporting limiting structure includes a plurality of first supporting bars (3). The side of the first supporting bar (3) is provided with a first arc-shaped concave (5). The powder feeding pipe mechanism is at least partially in contact with the first arc-shaped concave (5). The first arc-shaped concave (5) is provided with a first limiting groove (6). The first limiting groove (6) cooperates with the first limiting structure to limit the displacement of the powder feeding pipe mechanism.

2. The connection structure between the powder feeding pipe mechanism and the spray gun housing according to claim 1, characterized in that, The powder delivery pipe mechanism includes an air supply pipe (100) and a powder spraying pipe (200) that are interconnected. A fan is installed in the air supply pipe (100). The air supply pipe (100) is used to deliver the airflow generated by the fan to the powder spraying pipe (200). The first limiting structure is installed on the outer peripheral wall of the air supply pipe (100).

3. The connection structure between the powder feeding pipe mechanism and the spray gun housing according to claim 2, characterized in that, The first limiting structure includes two parallel arc-shaped protrusions (7), and a first protrusion (8) is provided between the two arc-shaped protrusions (7). The first protrusion (8) is perpendicular to the arc-shaped protrusions (7). The first protrusion (8) cooperates with the first limiting groove (6) to limit the displacement of the air supply duct (100) in the first direction. A plurality of first support bars (3) are arranged in parallel and spaced apart. The plurality of first support bars (3) include two end support bars located at both ends. The outer sides of the two arc-shaped protrusions (7) respectively contact the inner sides of the two end support bars to limit the displacement of the air supply duct (100) in the second direction. The first direction is perpendicular to the second direction.

4. The connection structure between the powder feeding pipe mechanism and the spray gun housing according to claim 2, characterized in that, The outer peripheral wall of the air supply duct (100) is also provided with a second limiting structure, and a second supporting limiting structure is provided at the corresponding position on the inner wall of the shell. The second limiting structure and the second supporting limiting structure cooperate to restrict the displacement of the air supply duct (100).

5. The connection structure between the powder feeding pipe mechanism and the spray gun housing according to claim 4, characterized in that, The second limiting structure is a second protruding rib (15) arranged along the length of the air supply duct (100), and the second supporting limiting structure is a second supporting strip (9). The side of the second supporting strip (9) is provided with a second arc-shaped concave (10). The air supply duct (100) is at least partially in contact with the second arc-shaped concave (10). The second arc-shaped concave (10) is provided with a second limiting groove (11). The second limiting groove (11) cooperates with the second protruding rib (15) to limit the displacement of the air supply duct (100) in the first direction.

6. The connection structure between the powder feeding pipe mechanism and the spray gun housing according to claim 2, characterized in that, The powder spraying pipe (200) includes a first powder conveying pipe (16) and a second powder conveying pipe (17), with the two ends of the first powder conveying pipe (16) being detachably connected to the air supply pipe (100) and the second powder conveying pipe (17), respectively.

7. The connection structure between the powder feeding pipe mechanism and the spray gun housing according to claim 6, characterized in that, The first powder conveying pipe (16) is a three-way structure, which includes a first pipe body (18) and a second pipe body (20) arranged vertically. The first pipe body (18) and the second pipe body (20) are interconnected. The first pipe body (18) includes a first pipe interface (19) and a second pipe interface (21). The first pipe interface (19) is connected to the air supply pipe (100), and the second pipe interface (21) is connected to the second powder conveying pipe (17). The second pipe body (20) is used to connect the powder conveying mechanism.

8. The connection structure between the powder feeding pipe mechanism and the spray gun housing according to claim 7, characterized in that, The first pipe body (18) is inserted into the air supply pipe (100). The outer peripheral wall of the first pipe interface (19) is provided with a first limiting block (22). The opening of the air supply pipe (100) is provided with a first groove (23). The first limiting block (22) is at least partially located in the first groove (23).

9. The connection structure between the powder feeding pipe mechanism and the spray gun housing according to claim 7, characterized in that, The first tube body (18) is inserted into the second powder conveying tube (17). The outer peripheral wall of the second tube interface (21) is provided with a second limiting block (24). The opening of the second powder conveying tube (17) is provided with a second groove (25). The second limiting block (24) is at least partially located in the second groove (25).

10. The connection structure between the powder feeding pipe mechanism and the spray gun housing according to claim 6, characterized in that, The inner wall of the shell is provided with a third support and limiting structure, which is used to prevent the first powder conveying pipe (16) from shaking.

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