A device for applying paint to an enameled wire

Abstract

The application provides a kind of enameled wire painting device, belongs to enameled wire processing technical field;Including cabinet, the paint pool and support are fixed in the cabinet, support is located above the paint pool, the end of support is equipped with paint scraping mold, it further includes: intercepting mechanism, the intercepting mechanism includes the cylinder that is installed at the bottom of support, the inner wall of cylinder is sequentially fixed with upper ring cover and lower ring cover from top to bottom, the inner wall of upper ring cover and lower ring cover is formed intercepting mouth, the inner diameter of the intercepting mouth of upper ring cover is less than the inner diameter of the intercepting mouth of lower ring cover, the outer wall of upper ring cover and lower ring cover is equipped with the gap, the bottom of cylinder is provided with reflux component.The paint liquid that is intercepted is in the closed space formed by the cooperation of cylinder and reflux component in the present application, and is refluxed to the paint pool in the closed space, the volatilization of solvent in paint liquid is reduced, thereby the influence on the viscosity of paint liquid is reduced, the film forming uniformity and quality reliability of wire insulation paint film are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of enameled wire processing technology, and in particular to an enameling device for enameled wire. Background Technology

[0002] The coils of transformers and inductors are usually made of copper wire, and an insulating varnish is coated on the surface of the copper wire. After being varnished, the copper wire becomes enameled wire. During the varnishing process, the copper wire is processed and then enters the cabinet. The copper wire passes through the varnish tank and the varnish scraping mold under the varnish tank in the cabinet, and then enters the baking oven for baking, so that the varnish layer on the surface of the copper wire dries and forms an insulating protective layer.

[0003] After the wire passes through the varnish bath, its surface is coated with a thick varnish layer due to the viscosity of the varnish and the speed of the wire. When the wire passes through the varnish-scraping die, excess varnish is intercepted by the die and flows downward. This portion of the varnish is directly exposed to the environment during the flow process. Upon contact with air, the internal solvent evaporates rapidly, causing an abnormal increase in the viscosity of the varnish. The fluctuation in viscosity directly affects the stability of the coating process, and ultimately affects the uniformity and reliability of the insulating varnish film on the wire. Therefore, this application provides a coating device for enameled wire to meet the requirements. Summary of the Invention

[0004] This invention provides a coating device for enameled wires to solve the problem that the uniformity and reliability of the insulating varnish film on wires need to be improved.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A coating device for enameled wire includes a cabinet, within which a paint tank and a support are fixed. The support is located above the paint tank, and a paint scraping mold is installed at the end of the support. The device also includes: An interception mechanism is provided, comprising a cylinder installed at the bottom of a support. An upper ring cover and a lower ring cover are fixed to the inner wall of the cylinder from top to bottom. An interception port is formed on the inner wall of both the upper and lower ring covers. The inner diameter of the interception port of the upper ring cover is smaller than that of the interception port of the lower ring cover. A notch is provided on the outer wall of both the upper and lower ring covers. A return flow assembly is provided at the bottom of the cylinder. During operation, the wire passes sequentially from the bottom of the paint tank through the paint tank, the lower ring cover, the upper ring cover, and the paint scraping mold. The paint liquid intercepted by the lower ring cover, the upper ring cover, and the paint scraping mold flows back into the paint tank through the return component.

[0006] Preferably, both the upper and lower ring covers are inclined, with the height of the inner wall of the upper ring cover being higher than the height of the outer wall, and the height of the inner wall of the lower ring cover being higher than the height of the outer wall.

[0007] Preferably, multiple triangular plates are fixed to the bottom of both the upper and lower ring covers.

[0008] Preferably, the bottom of both the upper and lower ring covers has multiple sets of guide grooves, with three guide grooves in each set, and the ends of the guide grooves are aligned with the interception port.

[0009] Preferably, the top of the inner wall of the guide channel is provided with an inclined surface, and the inclination angle of the inclined surface is greater than the inclination angle of the upper ring cover and the lower ring cover.

[0010] Preferably, both the upper and lower ring covers have flow guide blocks fixed at their bottoms. The flow guide blocks are located at the end of the flow guide channel away from the interception port, and the number of flow guide blocks corresponds to the number of flow guide channels. The flow guide blocks are in the shape of a four-sided pyramid.

[0011] Preferably, the top of both the upper and lower ring covers is provided with a through groove, which is elongated, and the top of both the upper and lower ring covers is provided with a cutting surface corresponding to the position of the through groove.

[0012] Preferably, a protrusion is fixed on the cutting surface at the position corresponding to the through groove, and the protrusion is located between the through groove and the wire.

[0013] Preferably, the reflux assembly includes a base plate fixed to the bottom of the cylinder and multiple notches formed at the bottom of the cylinder. The base plate includes an intercepting part, an inclined part, and a vertical part connected in sequence. The inclined part is fixed to the bottom of the cylinder. A circular cover is movably sleeved on the cylinder, covering the notches. A locking bolt is threaded onto the circular cover, with the end of the locking bolt abutting against the outer wall of the cylinder. A circular ring is fixedly sleeved at the bottom of the circular cover. When the circular cover moves vertically, it drives the circular ring to move along the inner wall of the vertical part. A protrusion is fixed at the top of the vertical part, which is used to limit the upward movement of the circular ring. A circular tube is connected to the bottom of the inclined part, and a mixing box is connected to the circular tube. A bent part is integrally formed at the bottom of the circular tube, with the end of the bent part away from the mixing box located above the paint pool.

[0014] Preferably, the mixing box includes a box body fixed on a circular tube, the box body being connected to the circular tube, and two inclined plates fixed from top to bottom on the inner wall of the box body, the two inclined plates having opposite inclination directions.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up an interception mechanism, during operation, after the wire passes through the bottom of the varnish pool, its surface is covered with a thick varnish layer. The thick varnish layer on the wire is intercepted by the lower and upper ring covers inside the cylinder, and then processed by the varnish scraping mold to finally form a varnish layer of qualified thickness. The varnish liquid intercepted by the lower ring cover, upper ring cover, and varnish scraping mold flows back to the varnish pool through the return component. The intercepted varnish liquid is in a closed space formed by the cylinder and the return component. Flowing back to the varnish pool in the closed space reduces the evaporation of solvent in the varnish liquid, thereby reducing the impact on the viscosity of the varnish liquid and ensuring the uniformity and reliability of the insulating varnish film on the wire.

[0016] By setting up upper and lower ring covers, both of which are inclined, excess paint is intercepted by these inclined covers. The intercepted paint flows downwards along the inclined bottom of the covers, thus achieving stable drainage of the intercepted paint and reducing paint accumulation at the interception point. This reduces the impact on paint adhering to the wire. At the same time, both the upper and lower ring covers are heating covers, which can heat the intercepted paint to adapt to the increased viscosity of paint in winter due to low temperatures. In winter, heating reduces the viscosity of the paint, thereby achieving rapid flow of the paint and preventing excessive accumulation of paint at the interception point due to winter temperatures.

[0017] By setting up a triangular plate, which is fixed at the bottom of the upper and lower ring covers, when the intercepted paint spreads at the bottom of the upper and lower ring covers, the paint will form a concentrated flow at the triangular plate, reducing the contact area between the paint and the upper and lower ring covers and reducing the viscous resistance of the paint. At the same time, the bottom of the triangular plate is tilted downward, which greatly accelerates the downward flow speed of the paint and further reduces the accumulation of paint at the interception port.

[0018] By setting up a flow channel, after the paint is intercepted by the upper and lower ring covers, some of the paint will directly enter the flow channel and flow downward along the inner wall of the flow channel, reducing the accumulation of paint at the interception point.

[0019] By setting up a ramp at the top of the inner wall of the guide channel, with the ramp angle being greater than that of the upper and lower ring covers, this design reduces the resistance to the initial diffusion of the paint liquid within the guide channel, allowing the paint liquid to diffuse rapidly. This further reduces the accumulation of paint liquid at the interception point, greatly minimizing the impact of the intercepted paint liquid on the paint layer still adhering to the wire.

[0020] By setting up guide blocks, when the paint flows along the inner wall of the guide channel to the guide block, the four-sided pyramid shape increases the falling speed of the paint at the guide block, reduces the accumulation of paint in the guide channel, and thus ensures that the guide channel can stably perform its function.

[0021] By setting up a channel, when the upper and lower ring covers intercept the paint liquid, a small portion of the paint liquid will flow through the channel. This allows the paint liquid to pass through the upper or lower ring cover, flow through the channel to the top of the upper or lower ring cover, and then flow downwards along the top of the upper or lower ring cover, eventually flowing back into the paint pool. The design of the channel further reduces the accumulation of paint liquid at the interception point.

[0022] By setting cutting surfaces on the upper and lower ring covers, the thickness of the corresponding passages in the upper and lower ring covers is reduced, thereby reducing the path of the paint flow in the passages and allowing the paint to flow smoothly in the passages. This further improves the ability of the passages to guide the flow of the paint and reduces the accumulation of paint at the interception point.

[0023] By setting the raised strips, after the paint flows out from the top of the channel, some of the paint adheres to the area between the channel and the wire at the top of the upper and lower ring covers. When this part of the paint flows downward through the channel, it will obstruct the paint flow in the channel. In order to reduce the impact on the paint flow in the channel, after the paint flows out of the channel, some of the paint continues to flow upward along the raised strips. When it flows downward after passing the raised strips, it flows down along the cutting surface under the dispersion effect of the raised strips. The blocking effect of the raised strips prevents the paint from flowing back into the channel, thus ensuring the stable flow of paint in the channel. Moreover, when the paint intercepted by the paint scraping mold flows downward, it will fall to the top of the upper ring cover. The blocking effect of the raised strips can prevent this part of the paint from flowing downward through the channel, thus greatly reducing the impact on the normal flow of paint in the channel.

[0024] By setting up a base plate, a circular tube, and a bend, the paint flowing down from the upper and lower ring covers flows onto the base plate, then enters the circular tube through the notch at the bottom of the cylinder, and finally flows out from the bend and back into the paint pool. When the interception mechanism is first used, there is air inside the circular tube. By designing the bend to be higher than the height of the paint pool, the air is squeezed out when the paint flows back from above, preventing air from entering the paint pool and causing air bubbles inside the paint.

[0025] By setting up a dome that blocks the opening, the size of the opening can be changed by moving the dome up and down. Since different types of paint have different viscosities, the size of the opening can be changed to accommodate the backflow of different types of paint.

[0026] By setting up an interception section and an inclined section, the base plate consists of an interception section, an inclined section, a vertical section, and a protrusion. The interception section is used to prevent the backflowing paint from falling from the wire. The inclined section is used to guide the flow of the paint, causing it to gather at the vertical section and finally flow back through the circular tube. The vertical section is used to guide the ring when it moves up and down. At the same time, the protrusion at the top of the vertical section prevents the ring from separating from the vertical section, ensuring that the ring stably seals the internal area of ​​the vertical section.

[0027] By setting up inclined plates, the paint flowing downward from the circular tube enters the mixing box. After being dispersed by two inclined plates with opposite inclinations in the box, it finally flows back into the circular tube. This design can mix the heated paint, making the paint mixture more uniform. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the cylindrical part of the present invention; Figure 3 This is a cross-sectional view of the cylindrical portion of the present invention; Figure 4 This is a three-dimensional structural diagram of the guide channel of the present invention; Figure 5 This is a three-dimensional structural diagram of the cutting surface of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of the structure at point A in the middle; Figure 7 This is a cross-sectional view of the box body of the present invention; Figure 8 This is a three-dimensional structural diagram of the notch in this invention; Figure 9 This is a cross-sectional view of the inclined portion of the present invention; Figure 10 This is a cross-sectional view of the guide channel of the present invention.

[0029] In the diagram: 1. Cabinet; 2. Paint tank; 3. Bracket; 4. Paint scraper mold; 5. Interception mechanism; 6. Cylinder; 7. Upper ring cover; 8. Lower ring cover; 9. Triangular plate; 10. Flow guide channel; 11. Inclined surface; 12. Flow guide block; 13. Through groove; 14. Raised strip; 15. Cutting surface; 16. Notch; 17. Return flow assembly; 18. Base plate; 19. Interception section; 20. Inclined section; 21. Vertical section; 22. Protrusion; 23. Circular cover; 24. Locking bolt; 25. Ring; 26. Circular tube; 27. Bending section; 28. Mixing box; 29. ​​Box body; 30. Inclined plate; 31. Notch.

[0030] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0031] The following is a detailed description of an enameled wire painting apparatus provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0032] like Figures 1-10As shown, an embodiment of the present invention provides a coating device for enameled wire, including a cabinet 1, a paint tank 2 and a support 3 fixed inside the cabinet 1, the support 3 being located above the paint tank 2, and a paint scraping mold 4 being installed at the end of the support 3. It also includes an interception mechanism 5, which includes a cylinder 6 installed at the bottom of the support 3. An upper ring cover 7 and a lower ring cover 8 are fixed sequentially from top to bottom on the inner wall of the cylinder 6. Both the upper ring cover 7 and the lower ring cover 8 have interception openings on their inner walls. The inner diameter of the interception opening of the upper ring cover 7 is smaller than that of the interception opening of the lower ring cover 8. Both the upper ring cover 7 and the lower ring cover 8 have notches 16 on their outer walls. Both the upper ring cover 7 and the lower ring cover 8 are inclined. The height of the inner wall of the upper ring cover 7 is higher than the height of the outer wall, and the height of the inner wall of the lower ring cover 8 is higher than the height of the outer wall. The inclined upper ring cover 7 and lower ring cover 8 allow the intercepted paint liquid to flow naturally downward along the inclined bottom, reducing the accumulation of paint liquid at the interception port. The upper ring cover 7 and lower ring cover 8 can heat the paint liquid as heating covers, reducing the viscosity of the paint liquid at low temperatures in winter, realizing rapid flow of the paint liquid, and preventing the paint liquid from accumulating in large quantities at the interception port. The notch 16 is used for the paint liquid to pass through the upper ring cover 7 or the lower ring cover 8 when flowing downward. The bottom of the cylinder 6 is provided with a return flow component 17.

[0033] During operation, the wire passes sequentially through the varnish pool 2, the lower ring cover 8, the upper ring cover 7, and the scraping mold 4 from the bottom of the varnish pool 2. The varnish intercepted by the lower ring cover 8, the upper ring cover 7, and the scraping mold 4 flows back into the varnish pool 2 through the return assembly 17. The cylinder 6 and the return assembly 17 cooperate to form a closed space, allowing the intercepted excess varnish to flow back into the varnish pool 2 within the closed space, reducing the evaporation of solvents in the varnish and reducing the impact on the viscosity of the varnish. The upper ring cover 7 and the lower ring cover 8 adopt interception ports with progressively smaller inner diameters, which can intercept excess varnish on the surface of the wire step by step. Together with the scraping mold 4, the thickness of the varnish layer is adjusted to ensure the uniformity and reliability of the insulating varnish film on the wire.

[0034] like Figure 4 As shown in this embodiment, multiple triangular plates 9 are fixed at the bottom of both the upper ring cover 7 and the lower ring cover 8. The triangular plates 9 can cause the paint flowing along the bottom of the upper ring cover 7 and the lower ring cover 8 to converge into a concentrated liquid flow, reducing the contact area between the paint and the upper ring cover 7 and the lower ring cover 8 to reduce viscous resistance. The downward tilt of the bottom of the triangular plates 9 can guide the concentrated liquid flow downward quickly, accelerate the return speed of the paint, and further reduce the accumulation of paint at the interception port.

[0035] like Figure 4 and Figure 10As shown in this embodiment, multiple sets of guide channels 10 are provided at the bottom of both the upper ring cover 7 and the lower ring cover 8. Each set of guide channels 10 consists of three channels. The ends of the guide channels 10 are aligned with the interception port. The guide channels 10 can divert some of the excess paint liquid that has been intercepted, allowing the paint liquid to flow downwards along the inner wall of the guide channels 10, thereby reducing the paint liquid accumulation pressure at the interception port. The alignment of the ends of the guide channels 10 with the interception port ensures that the paint liquid enters the guide channels 10 in a timely manner, improving the diversion and diversion effect.

[0036] The top of the inner wall of the guide channel 10 is provided with a slope 11. The inclination angle of the slope 11 is greater than that of the upper ring cover 7 and the lower ring cover 8. The slope 11 can reduce the resistance when the paint enters the guide channel 10, so that the paint can spread quickly and flow downward, improve the flow efficiency of the guide channel 10, further reduce the accumulation of paint at the interception port, and avoid affecting the quality of the paint layer on the wire surface.

[0037] like Figure 4 As shown in this embodiment, both the upper ring cover 7 and the lower ring cover 8 are fixed with guide blocks 12 at their bottoms. The guide blocks 12 are located at the end of the guide channel 10 away from the interception port, and the number of guide blocks 12 corresponds to the number of guide channels 10. The guide blocks 12 are in the shape of a four-sided pyramid. The four-sided pyramidal guide blocks 12 can guide the paint flowing along the guide channel 10 to fall quickly, avoid the paint from accumulating at the end of the guide channel 10, and ensure that the paint smoothly enters the return assembly 17.

[0038] like Figure 5 As shown in this embodiment, the top of both the upper ring cover 7 and the lower ring cover 8 is provided with a through groove 13. The through groove 13 is elongated. The top of both the upper ring cover 7 and the lower ring cover 8 is provided with a cutting surface 15 corresponding to the position of the through groove 13. The through groove 13 can divert some of the excess paint liquid to the top of the upper ring cover 7 and the lower ring cover 8 to flow downwards, reducing the drainage pressure at the bottom of the upper ring cover 7 and the lower ring cover 8. The cutting surface 15 can reduce the thickness of the upper ring cover 7 and the lower ring cover 8 at the through groove 13, shorten the flow path of the paint liquid in the through groove 13, and prevent the paint liquid from stagnating in the through groove 13.

[0039] like Figure 6 As shown in this embodiment, a protrusion 14 is fixed on the cutting surface 15 corresponding to the position of the through groove 13. The protrusion 14 is located between the through groove 13 and the wire. The protrusion 14 can prevent the paint liquid from flowing back into the through groove 13 and causing blockage. At the same time, it can prevent the paint liquid dripping from the paint scraping mold 4 from flowing through the through groove 13, so as to avoid interfering with the normal flow of paint liquid in the through groove 13 and ensure smooth drainage of the through groove 13.

[0040] like Figure 2 , Figure 3 and Figures 7-9As shown, in this embodiment, the reflux assembly 17 includes a base plate 18 fixed to the bottom of the cylinder 6 and multiple notches 31 formed at the bottom of the cylinder 6. The base plate 18 includes an intercepting part 19, an inclined part 20, and a vertical part 21 connected in sequence. The inclined part 20 is fixed to the bottom of the cylinder 6. A circular cover 23 is movably fitted onto the cylinder 6, covering the notches 31. A locking bolt 24 is threaded onto the circular cover 23, with the end of the locking bolt 24 abutting against the outer wall of the cylinder 6. A ring 25 is fixedly fitted to the bottom of the circular cover 23. When the circular cover 23 moves vertically, it drives the ring 25 to move along the inner wall of the vertical part 21. A protrusion 22 is fixed to the top of the vertical part 21. The inclined part 20 is used to limit the upward movement of the ring 25. The bottom of the inclined part 20 is connected to the round tube 26, and the round tube 26 is connected to the mixing box 28. The bottom of the round tube 26 is integrally formed with a bend 27. The end of the bend 27 away from the mixing box 28 is located above the paint pool 2. The intercepting part 19 can prevent the backflow of paint from flowing to the wire. The inclined part 20 guides the paint to gather towards the vertical part 21. The round cover 23 can adjust the opening size of the notch 31 to adapt to the backflow requirements of paints with different viscosities. The protrusion 22 limits the ring 25 to prevent it from separating from the vertical part 21. The round tube 26 and the bend 27 cooperate to discharge internal air during backflow, preventing air from entering the paint pool 2 and generating bubbles that affect the painting quality.

[0041] like Figure 7 As shown in this embodiment, the mixing box 28 includes a box body 29 fixed on the round tube 26. The box body 29 is connected to the round tube 26. Two inclined plates 30 are fixed from top to bottom on the inner wall of the box body 29. The two inclined plates 30 are inclined in opposite directions. The two inclined plates 30 can guide and disperse the heated paint liquid in the round tube 26, so that the paint liquid is mixed evenly and then flows back to the paint pool 2 through the bending part 27, ensuring that the temperature and viscosity of the returned paint liquid are uniform and improving the stability of the coating quality of the wire.

[0042] Working principle: The wire enters from the bottom of the paint pool 2, passes through the paint pool 2, the lower ring cover 8 and the upper ring cover 7 inside the cylinder 6 in sequence, and finally passes through the paint scraping mold 4 at the end of the bracket 3. The upper ring cover 7 and the lower ring cover 8 are both fixed to the inner wall of the cylinder 6, and the inner diameter of the interception port of the upper ring cover 7 is smaller than that of the interception port of the lower ring cover 8. The paint layer attached to the surface of the wire will be intercepted by the lower ring cover 8 first, and then further intercepted by the upper ring cover 7. Finally, it will be trimmed by the paint scraping mold 4. The excess paint liquid generated by interception and trimming will flow back to the paint pool 2 through the return component 17 at the bottom of the cylinder 6. The cylinder 6 and the return component 17 cooperate to form a closed space, and the excess paint liquid will be returned in this closed space. Both the upper ring cover 7 and the lower ring cover 8 are inclined, and the height of their inner walls is higher than that of their outer walls. After the excess paint is intercepted, it will flow naturally downward along the bottom of the two inclined ring covers. At the same time, both the upper ring cover 7 and the lower ring cover 8 are heating covers. During operation, the paint intercepted by them is heated. The heated paint continues to flow downward along the bottom of the inclined ring cover and eventually flows into the return component 17. In winter, the low temperature will cause the viscosity of the paint to increase. In winter, the viscosity of the paint is reduced by heating, thereby achieving rapid flow of the paint and preventing the paint from accumulating in large quantities at the interception port due to the influence of winter temperature. Multiple triangular plates 9 are fixed at the bottom of both the upper ring cover 7 and the lower ring cover 8. When excess paint flows along the bottom of the cover, it will converge into a concentrated liquid flow under the action of the triangular plates 9. The bottom of the triangular plates 9 is inclined downward to guide the concentrated liquid flow to flow downward quickly and finally flow into the return component 17. Both the upper ring cover 7 and the lower ring cover 8 have multiple sets of guide channels 10 at their bottoms. Some of the excess paint that is intercepted will directly enter the guide channel 10 and flow downward along the inner wall of the guide channel 10, diverting some of the paint to reduce the accumulation of paint at the interception port. The top of the inner wall of the guide channel 10 is provided with a slope 11. The inclination angle of the slope 11 is greater than that of the upper ring cover 7 and the lower ring cover 8. After the paint enters the guide channel 10, it can quickly diffuse and flow downward along the slope 11, reducing the resistance of the paint at the inlet of the guide channel 10 and improving the diversion efficiency. Both the bottom of the upper ring cover 7 and the lower ring cover 8 are fixed with guide blocks 12. The guide blocks 12 are in the shape of a four-sided pyramid. The paint liquid flowing along the inner wall of the guide channel 10 flows to the guide block 12 and is guided to fall quickly by the four-sided pyramid structure, so as to avoid the paint liquid accumulating at the end of the guide channel 10 and ensure that the paint liquid smoothly enters the return component 17. Both the upper ring cover 7 and the lower ring cover 8 have elongated channels 13 at their tops. Some of the excess paint that is intercepted will pass through the channels 13 and flow to the top of the upper ring cover 7 and the lower ring cover 8. Then it will flow downwards along the upper ring cover 7 and the lower ring cover 8 to further divert the paint, reduce the drainage pressure at the bottom of the upper ring cover 7 and the lower ring cover 8, and finally flow steadily into the return assembly 17. Both the upper ring cover 7 and the lower ring cover 8 have cutting surfaces 15 at the top corresponding to the through groove 13. The cutting surfaces 15 reduce the thickness of the upper ring cover 7 and the lower ring cover 8 at the through groove 13, shorten the flow path of the paint in the through groove 13, and allow the paint to pass through the through groove 13 quickly along the cutting surfaces 15, avoiding the paint from stagnating in the through groove 13. A protrusion 14 is fixed on the cutting surface 15 at the position corresponding to the through groove 13. The protrusion 14 is located between the through groove 13 and the wire. Some of the paint flowing out of the through groove 13 will flow upward along the protrusion 14 and then flow downward along the cutting surface 15 after passing the protrusion 14, so as to avoid the paint flowing back into the through groove 13 and causing blockage. At the same time, the excess paint intercepted by the paint scraping mold 4 drips downward and falls to the top of the upper ring cover 7. It is blocked by the protrusion 14 and flows downward along the cutting surface 15, so as to avoid flowing through the through groove 13 and interfering with the flow of paint in the through groove 13, thus ensuring smooth drainage in the through groove 13. The base plate 18 of the return assembly 17 is fixed to the bottom of the cylinder 6. The base plate 18 is composed of an intercepting part 19, an inclined part 20 and a vertical part 21 connected in sequence. The inclined part 20 is fixed to the bottom of the cylinder 6. The paint flowing down from the upper ring cover 7 and the lower ring cover 8 falls onto the inclined part 20 of the base plate 18. The intercepting part 19 blocks the paint from flowing to the wire. The inclined part 20 guides the paint to gather in the direction of the vertical part 21, so that the paint can be concentrated and enter the subsequent return channel. The bottom of the cylinder 6 has multiple notches 31. The round cover 23 is movably fitted onto the cylinder 6 and covers the notches 31. By loosening the locking bolts 24 on the round cover 23, the round cover 23 can be moved up and down to adjust the opening size of the notches 31 to meet the backflow requirements of paint liquids of different viscosities. A ring 25 is fixedly sleeved at the bottom of the circular cover 23. When the circular cover 23 moves vertically, it drives the ring 25 to slide along the inner wall of the vertical part 21. The protrusion 22 at the top of the vertical part 21 limits the ring 25 to prevent the ring 25 from separating from the vertical part 21, thus ensuring that the adjustment process of the circular cover 23 is stable and reliable. The bottom of the inclined part 20 is connected to a round tube 26. The paint liquid gathered on the base plate 18 enters the round tube 26. The paint liquid in the round tube 26 flows out through the bending part 27 and finally flows smoothly into the paint pool 2. When the interception mechanism 5 is initially working, there is air inside the round tube 26. When the paint liquid flows back, it squeezes the air inside the round tube 26. The air is discharged from the top of the paint pool 2 after passing through the bending part 27, preventing air from entering the paint pool 2 and causing bubbles in the paint liquid, which would affect the paint coating quality of the wire. A mixing box 28 is connected to the circular tube 26. The box body 29 of the mixing box 28 is connected to the circular tube 26. Two inclined plates 30 with opposite inclination directions are fixed on the inner wall of the box body 29 from top to bottom. After the paint liquid in the circular tube 26 flows into the box body 29, it is guided and dispersed by the two inclined plates 30 in sequence and finally flows back into the circular tube 26. The heated paint liquid can be mixed evenly by the guidance and dispersion of the inclined plates 30. After being mixed evenly, it finally flows back to the paint pool 2 through the bend 27 for reuse.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A coating device for enameled wire, comprising a cabinet (1), wherein a paint tank (2) and a support (3) are fixed inside the cabinet (1), the support (3) is located above the paint tank (2), and a paint scraping mold (4) is installed at the end of the support (3), characterized in that, Also includes: The interception mechanism (5) includes a cylinder (6) installed at the bottom of the bracket (3). The inner wall of the cylinder (6) is fixed with an upper ring cover (7) and a lower ring cover (8) from top to bottom. An interception port is formed on the inner wall of both the upper ring cover (7) and the lower ring cover (8). The inner diameter of the interception port of the upper ring cover (7) is smaller than the inner diameter of the interception port of the lower ring cover (8). The outer wall of both the upper ring cover (7) and the lower ring cover (8) is provided with a notch (16). A return flow assembly (17) is provided at the bottom of the cylinder (6). During operation, the wire passes through the paint tank (2), lower ring cover (8), upper ring cover (7) and paint scraping mold (4) sequentially from the bottom of the paint tank (2). The paint liquid intercepted by the lower ring cover (8), upper ring cover (7) and paint scraping mold (4) flows back to the paint tank (2) through the return assembly (17).

2. The enameling line painting apparatus according to claim 1, characterized in that, The upper ring cover (7) and the lower ring cover (8) are both inclined. The height of the inner wall of the upper ring cover (7) is higher than the height of the outer wall, and the height of the inner wall of the lower ring cover (8) is higher than the height of the outer wall. Both the upper ring cover (7) and the lower ring cover (8) are heating covers.

3. The enameling line painting apparatus according to claim 2, characterized in that, The bottom of both the upper ring cover (7) and the lower ring cover (8) are fixed with multiple triangular plates (9).

4. The enameling line painting apparatus according to claim 2, characterized in that, The bottom of both the upper ring cover (7) and the lower ring cover (8) are provided with multiple sets of guide grooves (10), each set of guide grooves (10) has three grooves, and the ends of the guide grooves (10) are aligned with the interception port.

5. The enameling line painting apparatus according to claim 4, characterized in that, The top of the inner wall of the guide channel (10) is provided with a slope (11), and the inclination angle of the slope (11) is greater than the inclination angle of the upper ring cover (7) and the lower ring cover (8).

6. The enameling line painting apparatus according to claim 4, characterized in that, The bottom of the upper ring cover (7) and the lower ring cover (8) are both fixed with guide blocks (12). The guide blocks (12) are located at the end of the guide groove (10) away from the interception port, and the number of guide blocks (12) corresponds to the number of guide grooves (10). The guide blocks (12) are in the shape of a quadrangular pyramid.

7. The enameling line painting apparatus according to claim 1, characterized in that, The top of the upper ring cover (7) and the lower ring cover (8) are provided with through grooves (13), which are long strips. The top of the upper ring cover (7) and the lower ring cover (8) are provided with cutting surfaces (15) corresponding to the through grooves (13).

8. The enameling line painting apparatus according to claim 7, characterized in that, A protrusion (14) is fixed on the cutting surface (15) corresponding to the position of the through groove (13), and the protrusion (14) is located between the through groove (13) and the wire.

9. The enameling line painting apparatus according to claim 1, characterized in that, The return assembly (17) includes a base plate (18) fixed to the bottom of the cylinder (6) and multiple notches (31) opened at the bottom of the cylinder (6). The base plate (18) includes an intercepting part (19), an inclined part (20), and a vertical part (21) connected in sequence. The inclined part (20) is fixed to the bottom of the cylinder (6). A circular cover (23) is movably sleeved on the cylinder (6). The circular cover (23) covers the notches (31), and a locking bolt (24) is threaded onto the circular cover (23). The end of the locking bolt (24) abuts against the outer wall of the cylinder (6). A ring (25) is fixedly fitted to the bottom of the cover (23). When the cover (23) moves vertically, it drives the ring (25) to move along the inner wall of the vertical part (21). A protrusion (22) is fixed to the top of the vertical part (21). The protrusion (22) is used to limit the upward movement of the ring (25). A round tube (26) is connected to the bottom of the inclined part (20). A mixing box (28) is connected to the top of the round tube (26). A bent part (27) is integrally formed at the bottom of the round tube (26). The end of the bent part (27) away from the mixing box (28) is located above the paint pool (2).

10. The enameling line painting apparatus according to claim 9, characterized in that, The mixing box (28) includes a box body (29) fixed on a round tube (26), the box body (29) is connected to the round tube (26), and two inclined plates (30) are fixed from top to bottom on the inner wall of the box body (29), the two inclined plates (30) are inclined in opposite directions.

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