Corona ring easy to process

Abstract

The utility model provides an easy-to-process corona ring, which comprises an annular body and a conductive needle, the annular body comprises an upper ring body and a lower ring body, the bottom surface of the upper ring body is oppositely sleeved with the top surface of the lower ring body, an annular recess along the edge of an inner ring is arranged at one end, close to the inner ring, of the bottom surface of the upper ring body, and the conductive needle is arranged in the annular recess. Correspondingly, an annular protrusion along the edge of the inner ring is arranged at the end, close to the inner ring, of the top face of the lower ring body, the annular concave is matched with the annular protrusion in shape, and the concave face of the annular concave is right opposite to the convex face of the annular protrusion. An annular groove is formed in a gap between the concave face of the annular concave and the protruding face of the annular protrusion, a lantern ring used for grounding the conductive needle is embedded in the annular groove, one end of the conductive needle is located on the annular body and electrically connected with the lantern ring, and the other end of the conductive needle is located outside the annular body.

Description

Technical Field

[0001] This utility model relates to the field of electrostatic spraying, and in particular to an easily processed corona ring. Background Technology

[0002] Electrostatic powder coating involves atomizing powder coating particles under the influence of an auxiliary airflow within the spray gun. A metal needle at the center of the nozzle releases high-voltage static electricity, radiating an electrostatic field. As the atomized powder coating particles pass through this field, they acquire an electrostatic charge. This charged particle then adheres to the oppositely charged surface of the workpiece, which is the basis of electrostatic spraying. Electrostatic spraying utilizes an electrostatic field to evenly distribute coating particles onto the surface of an object. However, an electrostatic field is generated near the nozzle, which can interact with surrounding objects, resulting in uneven electric field distribution between the spray gun and the workpiece. This uneven coating can even lead to quality issues such as "orange peel" texture. A corona ring neutralizes the corona discharge near the nozzle, preventing corona discharge and reducing or eliminating the impact of surrounding objects on the coating effect.

[0003] Corona rings are rarely used in the spraying field. They are only needed for sprayed workpieces with special shapes and high surface finish requirements. Moreover, the corona ring needs to be compatible with the spray gun. However, the existing corona ring structures used in electrostatic spraying guns need to be manufactured by injection molding. The injection molding process is relatively complex, resulting in high cost and long production cycle, which limits the application of corona rings in actual production. Utility Model Content

[0004] Therefore, it is necessary to provide an easily manufactured corona ring.

[0005] To solve the above-mentioned technical problems, this utility model provides an easily processed corona ring, including an annular body and a conductive needle. The annular body includes an upper annular body and a lower annular body. The bottom surface of the upper annular body and the top surface of the lower annular body are fitted together. The bottom surface of the upper annular body near the inner ring has an annular recess along the edge of the inner ring. Correspondingly, the top surface of the lower annular body near the inner ring has an annular protrusion along the edge of the inner ring. The annular recess and the annular protrusion are matched in shape. The recessed surface of the annular recess is directly opposite the protruding surface of the annular protrusion. The gap between the recessed surface of the annular recess and the protruding surface of the annular protrusion forms an annular groove. A collar for grounding the conductive needle is embedded in the annular groove. One end of the conductive needle is located on the annular body and electrically connected to the collar, and the other end is located outside the annular body.

[0006] Preferably, the shape of the collar matches the shape of the annular groove. The collar includes an insulating ring and a conductive ring. The conductive ring is sleeved outside the insulating ring. The inner ring wall of the conductive ring abuts against the outer ring wall of the insulating ring. The insulating ring is made of insulating material, and the conductive ring is made of conductive material.

[0007] Preferably, the upper ring body and the lower ring body are fixed by fasteners.

[0008] Preferably, the fastener is a screw, and there are multiple screws. A limiting groove is formed on the outer ring wall of the insulating ring. A first screw hole is formed on the lower ring body, and a second screw hole is formed on the upper ring body. The tail end of the screw passes through the first screw hole and the limiting groove in sequence and is threadedly connected to the second screw hole.

[0009] Preferably, the inner ring wall of the insulating ring is flush with the inner ring wall of the annular body, the insulating ring is made of Teflon, and the conductive ring is made of aluminum.

[0010] Preferably, the upper ring body has a through hole, one end of the conductive needle is located inside the through hole and abuts against the conductive ring, and the other end passes through the through hole and is located outside the upper ring body.

[0011] Preferably, the conductive needle is interference-fitted with the upper ring body.

[0012] Preferably, there are multiple conductive needles, which are arranged symmetrically in a ring shape, and each conductive needle is electrically connected to a conductive ring.

[0013] Preferably, the annular body is connected to an insulating fixing rod, and a grounding wire is provided inside the insulating fixing rod. One end of the wire is electrically connected to the conductive ring, and the other end is grounded.

[0014] The beneficial effects of this utility model are as follows: the ring body is divided into an upper ring body and a lower ring body that are nested together, so that an annular groove for inserting the ring is formed between the upper ring body and the lower ring body. This allows all the components that make up the overall structure to be easily processed by general machining equipment, which changes the cumbersome manufacturing process of the existing corona ring, thereby greatly shortening the manufacturing cycle and manufacturing cost, and enabling the newly designed corona ring to be put into production quickly. Attached Figure Description

[0015] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0016] Figure 1This is a schematic diagram of the overall structure of the annular body according to a preferred embodiment of the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of the decomposition of the ring-shaped structure;

[0018] Figure 3 This is a schematic diagram of the structure of the annular body connected with an insulating fixing rod and a fixing block according to a preferred embodiment of the present invention;

[0019] Figure 4 for Figure 3 Corresponding schematic exploded view;

[0020] Figure 5 This is a schematic diagram of the structure of the annular body after removing the upper annular body in a preferred embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the annular body after removing the collar in a preferred embodiment of the present invention;

[0022] Figure 7 for Figure 6 A structural diagram from the other end of the view;

[0023] Figure 8 This is a schematic diagram of the installation of the corona ring fixed on the electrostatic spray gun according to a preferred embodiment of the present invention;

[0024] In the figure: 1. Conductive needle; 2. Upper ring body; 20. Through hole; 21. Annular recess; 22. Recessed surface; 23. Second screw hole; 3. Lower ring body; 31. Annular protrusion; 32. Protruding surface; 33. First screw hole; 4. Annular groove; 5. Insulating ring; 51. Limiting groove; 6. Conductive ring; 7. Screw; 8. Insulating fixing rod; 9. Fixing block; 10. Spray gun. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0026] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] refer to Figures 1-8 This utility model provides an easily processed corona ring, including an annular body and a conductive needle 1. The annular body includes an upper annular body 2 and a lower annular body 3. The bottom surface of the upper annular body 2 and the top surface of the lower annular body 3 are fitted together. An annular recess 21 along the edge of the inner ring is provided at one end of the bottom surface of the upper annular body 2 near the inner ring. Correspondingly, an annular protrusion 31 along the edge of the inner ring is provided at one end of the top surface of the lower annular body 3 near the inner ring. The annular recess 21 and the annular protrusion 31 are matched in shape. The recessed surface 22 of the annular recess 21 is directly opposite the protruding surface 32 of the annular protrusion 31. The gap between the recessed surface 22 of the annular recess and the protruding surface 32 of the annular protrusion forms an annular groove 4. A collar for grounding the conductive needle 1 is embedded in the annular groove 4. One end of the conductive needle 1 is located inside the annular body and electrically connected to the collar, and the other end is located outside the annular body. The corona ring of this application modifies its structure so that its components can be separately manufactured by machining. The ring body is divided into an upper ring body 2 and a lower ring body 3 that are nested together, so that an annular groove 4 for inserting the ring is formed between the upper ring body 2 and the lower ring body 3. This allows each component that makes up the overall structure to be easily manufactured by existing general-purpose machining equipment, changing the cumbersome manufacturing process of existing corona rings that require injection molding and overmolding, thereby greatly shortening the manufacturing cycle and reducing the manufacturing cost, and enabling the newly designed corona ring to be put into production quickly.

[0029] refer to Figures 1-2 , Figure 5 , Figures 6-7 In a preferred embodiment, the shape of the collar matches the shape of the annular groove 4. The collar includes an insulating ring 5 and a conductive ring 6. The conductive ring 6 is sleeved on the outside of the insulating ring 5. The inner ring wall of the conductive ring 6 abuts against the outer ring wall of the insulating ring 5. The insulating ring 5 is made of insulating material, and the conductive ring 6 is made of conductive material.

[0030] refer to Figures 6-7 In a preferred embodiment, the upper ring 2 and the lower ring 3 are fixed by fasteners.

[0031] refer to Figure 2 , Figure 4 and Figure 5 In a preferred embodiment, the fastener is a screw 7, and there are multiple screws 7. A limiting groove 51 is formed on the outer ring wall of the insulating ring 5. A first screw hole 33 is formed on the lower ring body 3, and a second screw hole 23 is formed on the upper ring body 2. The tail end of the screw 7 passes through the first screw hole 33 and the limiting groove 51 in sequence, and is threadedly connected to the second screw hole 23. Optionally, the fastener is a bolt.

[0032] refer to Figure 1 and Figure 5 In a preferred embodiment, the inner ring wall of the insulating ring 5 is flush with the inner ring wall of the annular body, the insulating ring 5 is made of Teflon, and the conductive ring 6 is made of aluminum.

[0033] refer to Figures 2-4 , Figure 7 In a preferred embodiment, the upper ring body 2 has a through hole 20, one end of the conductive needle 6 is located inside the through hole 20 and abuts against the conductive ring 6, and the other end passes through the through hole 20 and is located outside the upper ring body 2.

[0034] In a preferred embodiment, the conductive needle 1 and the upper ring body 2 are press-fitted through the through hole 20. The conductive needle 1 is inserted into the through hole 20, thereby press-fitting with the upper ring body 2.

[0035] In a preferred embodiment, there are multiple conductive needles 1, which are symmetrically distributed in a ring shape along the annular body, and are electrically connected to the conductive ring 6 respectively.

[0036] refer to Figure 3 and Figure 4 In a preferred embodiment, the annular body is connected to an insulating fixing rod 8, and a grounding wire is disposed inside the insulating fixing rod 8. One end of the wire is electrically connected to the conductive ring, and the other end is grounded. The extending direction of the insulating fixing rod 8 is perpendicular to the plane containing the annular body.

[0037] The end of the conductive ring exposed on the outside of the upper ring body 2 attracts excess charge near the nozzle of the spray gun 10, and then absorbs and conducts it away through the grounded conductive ring 6, thereby preventing orange peel from appearing on the surface of the sprayed coating product.

[0038] The shape of the inner ring of the annular body matches the shape of the spray gun 10 to be fitted. The annular body is fitted onto the nozzle of the spray gun 10 and thus connected to the nozzle. The annular body is provided with a fixing rod, which is connected to the gun body of the spray gun 10 away from the nozzle end. The fixing rod is connected to the spray gun 10 by fasteners.

[0039] Optionally, the first end of the insulating fixing rod 8 is connected to the annular body, and the second end of the insulating fixing rod 8 is detachably connected to a fixing block 9, which is used to be installed on the electrostatic spray gun 10.

[0040] Preferably, the second end of the fixing rod is connected to the fixing block 9 by a snap-fit.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A corona ring that is easy to process, characterized in that The application relates to a ring-shaped body and a conductive needle, wherein the ring-shaped body comprises an upper ring body and a lower ring body, the bottom surface of the upper ring body is oppositely connected with the top surface of the lower ring body, a ring-shaped recess is arranged on the bottom surface of the upper ring body and close to one end of an inner circle edge, a corresponding ring-shaped protrusion is arranged on the top surface of the lower ring body and close to one end of an inner circle edge, the shape of the ring-shaped recess is matched with the shape of the ring-shaped protrusion, the recess surface of the ring-shaped recess is opposite to the protrusion surface of the ring-shaped protrusion, a gap between the recess surface of the ring-shaped recess and the protrusion surface of the ring-shaped protrusion forms a ring-shaped groove, a sleeve ring for grounding the conductive needle is inlaid in the ring-shaped groove, one end of the conductive needle is electrically connected with the ring-shaped body and the sleeve ring, and the other end of the conductive needle is located outside the ring-shaped body.

2. The corona ring of claim 1, wherein, The shape of the sleeve ring is matched with the shape of the ring-shaped groove, the sleeve ring comprises an insulating ring and a conductive ring, the conductive ring is sleeved outside the insulating ring, the inner ring wall of the conductive ring is in abutment with the outer ring wall of the insulating ring, the insulating ring is made of an insulating material, and the conductive ring is made of a conductive material.

3. The corona ring of claim 2, wherein, The upper ring body and the lower ring body are fixed through fasteners.

4. The corona ring of claim 3, wherein, The fasteners are screws, there are a plurality of the screws, a limiting groove is arranged on the outer ring wall of the insulating ring, a first screw hole is arranged on the lower ring body, a second screw hole is arranged on the upper ring body, and the tail end of the screw is sequentially threaded through the first screw hole and the limiting groove and is threadedly connected with the second screw hole.

5. The corona ring of claim 2 wherein, The inner ring wall of the insulating ring is flush with the inner ring wall of the ring-shaped body, the material of the insulating ring is Teflon, and the material of the conductive ring is metal aluminum.

6. The corona ring of claim 2 wherein, A through hole is arranged on the upper ring body, one end of the conductive needle is in abutment with the conductive ring in the through hole, and the other end of the conductive needle is located outside the upper ring body through the through hole.

7. The corona ring of claim 1 wherein, The conductive needle is in interference fit with the upper ring body.

8. The corona ring of claim 2 wherein, There are a plurality of the conductive needles, the plurality of the conductive needles are distributed in a ring shape and are mutually symmetrical, and the conductive needles are respectively electrically connected with the conductive ring.

9. The corona ring of claim 2 wherein, The ring-shaped body is connected with an insulating fixing rod, a grounding wire is arranged in the insulating fixing rod, one end of the wire is electrically connected with the conductive ring, and the other end of the wire is grounded.

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