A deep cavity workpiece inner wall coating guide nozzle structure

Abstract

This invention relates to the field of workpiece coating, and mainly discloses a guide nozzle structure for coating the inner wall of a deep cavity workpiece. The structure includes a spray tank, a mounting base on the surface of the spray tank, a moving screw inside the moving groove, a feed pipe on the surface of the fixed frame, and spray heads and an inlet pipe on the surface of the feed pipe. This invention facilitates the spraying of coating onto the inner wall of the workpiece through the arrangement of multiple spray heads. Furthermore, the displacement of the spray heads facilitates uniform coating of the workpiece surface. Then, a drive motor rotates a positioning plate, facilitating the flipping of the workpiece. The spray heads then spray the bottom of the workpiece. The flipping of the workpiece ensures uniform coating of the workpiece surface, avoiding the problem of insufficient coating or even missed coating at the other end of the workpiece due to the narrow gaps in the workpiece body caused by viscous resistance, surface tension, and cavity wall adsorption when spraying from only one end.

Description

Technical Field

[0001] This invention relates to the field of workpiece coating, and more specifically, to a guide nozzle structure for coating the inner wall of a deep cavity workpiece. Background Technology

[0002] In industries such as machinery manufacturing, automotive parts, aerospace, and home appliances, there are numerous deep-cavity workpieces (such as hydraulic valve bodies, gearbox housings, compressor cylinders, and tubular joints), whose internal cavity depth-to-diameter ratio (L / D) is often greater than 3:1, and can even reach over 10:1. To improve corrosion resistance, wear resistance, or insulation performance, it is often necessary to apply a uniform coating to the inner wall of these workpieces, such as curtain coating, spray coating, or dip coating.

[0003] In existing technologies, the spray coating process is widely used for internal cavity coating due to its advantages such as high paint utilization, no splashing, and controllable film thickness. This process usually injects liquid paint into the top of the workpiece cavity at a certain flow rate and pressure through a nozzle, and relies on gravity to flow down naturally along the inner wall to form a coating. However, in the application of deep cavity workpieces, traditional spray coating nozzles face severe challenges. The paint cannot effectively reach the bottom of the workpiece. Due to the narrow and long workpiece, the paint is rapidly thinned during the flow process due to viscous resistance, surface tension, and adsorption by the cavity wall, resulting in the coating being too thin or even missing at the other end of the workpiece.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a deep cavity workpiece inner wall coating guide nozzle structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A deep cavity workpiece inner wall coating guide nozzle structure includes a spray tank, a mounting base is provided on the surface of the spray tank, a hydraulic lifting rod is provided on the surface of the mounting base, a support frame is provided at the lifting end of the hydraulic lifting rod, a movable plate is provided on the side of the support frame, a movable groove is opened on the side of the movable plate, a movable screw is provided in the movable groove, a traction plate is screwed to the surface of the movable screw, a fixed frame is provided at the bottom of the traction plate, a material conveying pipe is provided on the surface of the fixed frame, and a spray head and a feed pipe are provided on the surface of the material conveying pipe. The support frame has a mounting plate at its bottom, and a through hole is opened on the side of the mounting plate. A positioning bearing is installed in the through hole, and a fixing rod is inserted into the positioning bearing. A guide plate is provided on the end face of the fixing rod. A motor plate is provided on the side of the mounting plate, and a drive motor is provided on the surface of the motor plate. A fixing groove is opened at the bottom of the guide plate, and a traction rod is installed in the fixing groove. A slider is screwed to the surface of the traction rod, and a positioning plate is provided on the side of the slider.

[0007] Furthermore, the hydraulic lifting rod is fixedly connected to the surface of the mounting base, the movable plate is fixedly connected to the side of the support frame, the side of the support frame is provided with a motor base, and the surface of the motor base is provided with a motor.

[0008] Furthermore, the end face of the movable groove has a hole, a fixed bearing is installed in the hole, the movable screw is fixedly connected to the inner ring surface of the fixed bearing, the drive end of the motor is fixedly connected to the end face of the movable screw, and the traction plate is slidably connected to the movable groove.

[0009] Furthermore, the fixing frame is fixedly connected to the surface of the traction plate, the spray head passes through the fixing frame, and multiple sets of spray heads are provided. The multiple sets of spray heads are arranged linearly at equal intervals about the surface of the feed pipe, and one end of the feed pipe is connected to the spraying equipment.

[0010] Furthermore, the mounting plate is fixedly connected to the bottom of the support frame, the fixing rod is fixedly connected to the inner ring surface of the positioning bearing, the driving end of the drive motor is fixedly connected to the end face of the fixing rod, the drive motor is fixedly connected to the surface of the motor plate, the surface of the fixing groove is provided with a vertical plate, a limit bearing is provided in the vertical plate, and the traction rod is fixedly connected to the inner ring surface of the limit bearing.

[0011] Furthermore, one end of the traction rod has a left-hand thread, the other end has a right-hand thread, and a positioning nut is screwed onto one end of the traction rod, with a damping ring on the surface of the positioning nut.

[0012] Furthermore, the positioning plate is fixedly connected to the side of the slider. The positioning plate has an overall "L" shaped plate structure. There are two sets of sliders, which are symmetrically distributed about the vertical plate.

[0013] Furthermore, an electric push rod is provided at the bottom of the motor plate, a positioning push plate is provided at the moving end of the electric push rod, and an auxiliary plate is provided on the side of the positioning push plate. The auxiliary plate has a square plate structure, and there are two sets of auxiliary plates, which are symmetrically distributed about the positioning push plate.

[0014] Furthermore, the mounting plate has auxiliary grooves on its side, and there are two sets of auxiliary grooves. The two sets of auxiliary grooves are symmetrically distributed about the mounting plate. The auxiliary plate passes through the auxiliary grooves and is slidably connected to the auxiliary grooves.

[0015] Furthermore, the slider has an overall "L"-shaped plate structure, the slider is slidably connected to the fixing groove, the upright plate is fixedly connected to the surface of the fixing groove, and a protective cover is provided on the side of the guide plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The structure of the present invention first positions the workpiece using two sets of positioning plates, thereby facilitating the spraying of coating onto the inner wall of the workpiece by setting multiple sets of spray heads. In addition, the displacement of the spray heads facilitates the uniform coating of coating onto the surface of the workpiece. Then, in conjunction with the drive motor, the positioning plates are rotated, thereby facilitating the flipping of the workpiece. Then, in conjunction with the spray heads, the bottom of the workpiece is sprayed and coated. The flipping of the workpiece facilitates the uniform coating of coating onto the surface of the workpiece, avoiding the problem of the coating being too thin or even missing at the other end of the workpiece when spraying only from one end. This is because the gap between the workpieces is narrow and long, and the coating is rapidly thinned during the flow process due to viscous resistance, surface tension and cavity wall adsorption. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a deep cavity workpiece inner wall coating guide nozzle structure according to an embodiment of the present invention; Figure 2 This is a partial structural diagram of a deep cavity workpiece inner wall coating guide nozzle structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the mounting plate and positioning plate structure in a deep cavity workpiece inner wall coating guide nozzle structure according to an embodiment of the present invention; Figure 4 yes Figure 3 Enlarged structural diagram at point A in the diagram; Figure 5 This is a side view of a deep cavity workpiece inner wall coating guide nozzle structure according to an embodiment of the present invention; Figure 6 yes Figure 5 Enlarged structural diagram at point B in the diagram; Figure 7 This is a schematic diagram of the structure of a deep cavity workpiece inner wall coating guide nozzle when tilted, according to an embodiment of the present invention; Figure 8 yes Figure 7 A magnified structural diagram at point C in the diagram.

[0019] Figure label: 1. Spray tank; 2. Mounting base; 3. Hydraulic lifting rod; 4. Support frame; 5. Moving plate; 6. Moving trough; 7. Moving screw; 8. Traction plate; 9. Fixed frame; 10. Conveying pipe; 11. Spray head; 12. Feed pipe; 13. Mounting plate; 14. Positioning bearing; 15. Fixed rod; 16. Guide plate; 17. Motor plate; 18. Drive motor; 19. Fixed trough; 20. Traction rod; 21. Slider; 22. Positioning plate; 23. Motor base; 24. Motor; 25. Fixed bearing; 26. Vertical plate; 27. Limit bearing; 29. ​​Positioning nut; 30. Damping ring; 31. Electric push rod; 32. Positioning push plate; 33. Auxiliary plate; 34. Auxiliary trough; 35. Protective cover. Detailed Implementation

[0020] The invention will now be further described with reference to the accompanying drawings and specific embodiments: Example 1 Please see Figure 1-8 According to an embodiment of the present invention, a deep cavity workpiece inner wall coating guide nozzle structure includes a spray tank 1, a mounting base 2 is provided on the surface of the spray tank 1, a hydraulic lifting rod 3 is provided on the surface of the mounting base 2, a support frame 4 is provided at the lifting end of the hydraulic lifting rod 3, a movable plate 5 is provided on the side of the support frame 4, a movable groove 6 is opened on the side of the movable plate 5, a movable screw 7 is provided in the movable groove 6, a traction plate 8 is screwed to the surface of the movable screw 7, and a fixing frame 9 is provided at the bottom of the traction plate 8. A material conveying pipe 10 is provided, and a spray head 11 and a feed pipe 12 are provided on the surface of the material conveying pipe 10. The hydraulic lifting rod 3 is provided to facilitate the height adjustment of the support frame 4, thereby facilitating the subsequent height adjustment of multiple sets of spray heads 11 and workpieces. It is also convenient to inspect the coating status of the workpieces after the height is adjusted. When coating is required, it is convenient to place the workpiece inside the spray tank 1 to avoid the sprayed paint splashing in all directions. The moving screw 7 is provided to facilitate the lateral displacement of multiple sets of spray heads 11, increasing the convenience of spraying the spray heads 11.

[0021] The support frame 4 has a mounting plate 13 at its bottom. A through hole is formed on the side of the mounting plate 13, and a positioning bearing 14 is installed inside the through hole. A fixing rod 15 is inserted into the positioning bearing 14. A guide plate 16 is provided on the end face of the fixing rod 15. A motor plate 17 is provided on the side of the mounting plate 13, and a drive motor 18 is provided on the surface of the motor plate 17. A fixing groove 19 is formed at the bottom of the guide plate 16, and a traction rod 20 is installed inside the fixing groove 19. A slider 21 is screwed onto the surface of the traction rod 20, and a positioning plate 22 is provided on the side of the slider 21. The drive motor 18, in conjunction with the positioning bearing 14, facilitates the subsequent rotation of the guide plate 16, thereby facilitating the flipping of the workpiece fixed by the positioning plate 22. This allows the spray head 11 to spray the flipped workpiece, increasing the uniformity of the spray coating.

[0022] Please see Figures 1-2 As shown, the hydraulic lifting rod 3 is fixedly connected to the surface of the mounting base 2, the movable plate 5 is fixedly connected to the side of the support frame 4, the side of the support frame 4 is provided with a motor base 23, the surface of the motor base 23 is provided with a motor 24, the end face of the movable groove 6 is provided with a hole, the hole is provided with a fixed bearing 25, the movable screw 7 is fixedly connected to the inner ring surface of the fixed bearing 25, the drive end of the motor 24 is fixedly connected to the end face of the movable screw 7, and the traction plate 8 is slidably connected to the movable groove 6. By starting the hydraulic lifting rod 3, the support frame 4 can be driven to adjust its height, thereby driving the workpiece to adjust its height, which is convenient for the staff to check the coating of the workpiece and to place the workpiece inside the spray tank 1. In addition, by starting the motor 24 in conjunction with the fixed bearing 25, the movable screw 7 can be driven to rotate. The rotation of the movable screw 7 can drive the traction plate 8 to move along the movable groove 6. The opening of the movable groove 6 can guide the displacement of the traction plate 8 and also prevent the traction plate 8 from rotating when the movable screw 7 is rotated.

[0023] Please see Figures 1-2 As shown, the fixing frame 9 is fixedly connected to the surface of the traction plate 8. The spray head 11 passes through the fixing frame 9. There are multiple sets of spray heads 11. The multiple sets of spray heads 11 are arranged linearly at equal intervals about the surface of the feed pipe 10. One end of the feed pipe 12 is connected to the spraying equipment. The arrangement of multiple sets of spray heads 11 facilitates the increase of the spraying area on the surface of the workpiece, and also facilitates the subsequent coating to flow into the interior of the workpiece along the gaps in the workpiece.

[0024] Example 2 Please see Figures 2-5As shown, based on Embodiment 1, an mounting plate 13 is provided, which is fixedly connected to the bottom of the support frame 4. A fixing rod 15 is fixedly connected to the inner ring surface of the positioning bearing 14. The drive end of the drive motor 18 is fixedly connected to the end face of the fixing rod 15. The drive motor 18 is fixedly connected to the surface of the motor plate 17. A vertical plate 26 is provided on the surface of the fixing groove 19, and a limit bearing 27 is provided inside the vertical plate 26. A traction rod 20 is fixedly connected to the inner ring surface of the limit bearing 27. One end of the traction rod 20 has a left-hand thread, and the other end has a right-hand thread. A positioning nut 29 is screwed onto one end of the traction rod 20, and a damping ring 30 is provided on the surface of the positioning nut 29. Firstly, the drive motor 18 cooperates with... The positioning bearing 14 facilitates the rotation of the fixed rod 15, which in turn drives the guide plate 16 to rotate. This facilitates the rotation of the positioned workpiece, allowing the spray head 11 to evenly coat the workpiece. Additionally, the fixed groove 19 is located at the bottom of the guide plate 16, preventing paint from entering the fixed groove 19 and affecting the subsequent rotation of the traction rod 20. Rotating the traction rod 20 facilitates the opposite displacement of the two sets of sliders 21, thereby using the positioning plate 22 to position and clamp the workpiece. Then, rotating the positioning nut 29 tightens the damping ring 30 against the end face of the guide plate 16, preventing subsequent rotation of the traction rod 20 and increasing its stability. This, in turn, improves the stability of the positioning plate 22 in clamping and positioning the workpiece.

[0025] Please see Figures 5-8 As shown, the positioning plate 22 is fixedly connected to the side of the slider 21. The positioning plate 22 has an overall "L" shaped plate structure. There are two sets of sliders 21, which are symmetrically distributed about the upright plate 26. An electric push rod 31 is provided at the bottom of the motor plate 17. A positioning push plate 32 is provided at the moving end of the electric push rod 31. An auxiliary plate 33 is provided on the side of the positioning push plate 32. The auxiliary plate 33 has a square plate structure. There are two sets of auxiliary plates 33, which are symmetrically distributed about the positioning push plate 32. When the positioning plate 22 is placed horizontally, the electric push rod 31 is activated to push the positioning push plate 32, causing the auxiliary plate 33 to move forward and move to the bottom of the guide plate 16 to support the bottom of the guide plate 16. The support of the auxiliary plate 33 reduces the pressure of the guide plate 16 on the fixed rod 15 and also prevents the guide plate 16 from rotating automatically in the future.

[0026] Please see Figures 5-8As shown, the mounting plate 13 has an auxiliary groove 34 on its side. There are two sets of auxiliary grooves 34, which are symmetrically distributed about the mounting plate 13. The auxiliary plate 33 passes through the auxiliary groove 34 and is slidably connected to the auxiliary groove 34. The slider 21 has an overall "L" shaped plate structure and is slidably connected to the fixing groove 19. The upright plate 26 is fixedly connected to the surface of the fixing groove 19. The guide plate 16 is provided with a protective cover 35 on its side. The opening of the auxiliary groove 34 facilitates the support of the auxiliary plate 33, thereby reducing the downward pressure of the auxiliary plate 33 on the electric push rod 31. Through the protection of the electric push rod 31, the setting of the protective cover 35 facilitates the protection of the drive motor 18 and prevents paint from splashing onto the surface of the drive motor 18.

[0027] Through the above-described scheme of the present invention, the present invention first positions the workpiece using two sets of positioning plates 22, thereby facilitating the spraying of coating onto the inner wall of the workpiece by setting multiple sets of spray heads 11. In addition, the displacement of the spray heads 11 facilitates the uniform coating of coating onto the surface of the workpiece. Then, in conjunction with the drive motor 18, the positioning plates 22 are rotated, thereby facilitating the flipping of the workpiece. Then, in conjunction with the spray heads 11, the bottom of the workpiece is sprayed and coated. By flipping the workpiece, the coating is evenly coated onto the surface of the workpiece, avoiding the problem of the coating being too thin or even missing at the other end of the workpiece when spraying only from one end, due to the narrow gap between the workpiece bodies.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deep cavity workpiece inner wall coating guide nozzle structure, comprising a spray tank (1), characterized in that, The surface of the spray tank (1) is provided with an installation base (2), the surface of the installation base (2) is provided with a hydraulic lifting rod (3), the lifting end of the hydraulic lifting rod (3) is provided with a support frame (4), the side of the support frame (4) is provided with a moving plate (5), the side of the moving plate (5) is provided with a moving groove (6), the moving groove (6) is provided with a moving screw (7), the surface of the moving screw (7) is screwed with a traction plate (8), the bottom of the traction plate (8) is provided with a fixed frame (9), the surface of the fixed frame (9) is provided with a material conveying pipe (10), the surface of the material conveying pipe (10) is provided with a spray head (11) and a feed pipe (12); The support frame (4) has a mounting plate (13) at the bottom. The mounting plate (13) has a through hole on its side. A positioning bearing (14) is installed in the through hole. A fixing rod (15) is inserted into the positioning bearing (14). A guide plate (16) is installed on the end face of the fixing rod (15). A motor plate (17) is installed on the side of the mounting plate (13). A drive motor (18) is installed on the surface of the motor plate (17). A fixing groove (19) is opened at the bottom of the guide plate (16). A traction rod (20) is installed in the fixing groove (19). A slider (21) is screwed onto the surface of the traction rod (20). A positioning plate (22) is installed on the side of the slider (21).

2. The deep cavity workpiece inner wall coating guide nozzle structure according to claim 1, characterized in that, The hydraulic lifting rod (3) is fixedly connected to the surface of the mounting base (2), the moving plate (5) is fixedly connected to the side of the support frame (4), the side of the support frame (4) is provided with a motor base (23), and the surface of the motor base (23) is provided with a motor (24).

3. The deep cavity workpiece inner wall coating guide nozzle structure according to claim 2, characterized in that, The end face of the movable groove (6) has a hole, and a fixed bearing (25) is installed in the hole. The movable screw (7) is fixedly connected to the inner ring surface of the fixed bearing (25). The drive end of the motor (24) is fixedly connected to the end face of the movable screw (7). The traction plate (8) is slidably connected to the movable groove (6).

4. The deep cavity workpiece inner wall coating guide nozzle structure according to claim 3, characterized in that, The fixed frame (9) is fixedly connected to the surface of the traction plate (8). The spray head (11) passes through the fixed frame (9). There are multiple sets of spray heads (11). The multiple sets of spray heads (11) are arranged linearly at equal intervals about the surface of the feed pipe (10). One end of the feed pipe (12) is connected to the spraying equipment.

5. The deep cavity workpiece inner wall coating guide nozzle structure according to claim 4, characterized in that, The mounting plate (13) is fixedly connected to the bottom of the support frame (4), the fixing rod (15) is fixedly connected to the inner ring surface of the positioning bearing (14), the driving end of the drive motor (18) is fixedly connected to the end face of the fixing rod (15), the drive motor (18) is fixedly connected to the surface of the motor plate (17), the surface of the fixing groove (19) is provided with a vertical plate (26), a limit bearing (27) is provided in the vertical plate (26), and the traction rod (20) is fixedly connected to the inner ring surface of the limit bearing (27).

6. The deep cavity workpiece inner wall coating guide nozzle structure according to claim 5, characterized in that, The traction rod (20) has a left-hand thread on one end and a right-hand thread on the other end. A positioning nut (29) is screwed onto one end of the traction rod (20), and a damping ring (30) is provided on the surface of the positioning nut (29).

7. The deep cavity workpiece inner wall coating guide nozzle structure according to claim 5, characterized in that, The positioning plate (22) is fixedly connected to the side of the slider (21). The positioning plate (22) has an overall "L" shaped plate structure. There are two sets of sliders (21), and the two sets of sliders (21) are symmetrically distributed about the upright plate (26).

8. The deep cavity workpiece inner wall coating guide nozzle structure according to claim 5, characterized in that, The motor plate (17) is provided with an electric push rod (31) at the bottom. The moving end of the electric push rod (31) is provided with a positioning push plate (32). The side of the positioning push plate (32) is provided with an auxiliary plate (33). The auxiliary plate (33) has a square plate structure. There are two sets of auxiliary plates (33). The two sets of auxiliary plates (33) are symmetrically distributed about the positioning push plate (32).

9. The deep cavity workpiece inner wall coating guide nozzle structure according to claim 5, characterized in that, The mounting plate (13) has an auxiliary groove (34) on its side. There are two sets of auxiliary grooves (34). The two sets of auxiliary grooves (34) are symmetrically distributed about the mounting plate (13). The auxiliary plate (33) passes through the auxiliary groove (34) and is slidably connected to the auxiliary groove (34).

10. The deep cavity workpiece inner wall coating guide nozzle structure according to claim 5, characterized in that, The slider (21) is in the shape of an "L" plate. The slider (21) is slidably connected to the fixing groove (19). The upright plate (26) is fixedly connected to the surface of the fixing groove (19). A protective cover (35) is provided on the side of the guide plate (16).

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