High voltage ceramic corona electrode structure for a corona machine

Abstract

This utility model belongs to the technical field of corona treatment equipment, and discloses a high-voltage ceramic corona electrode structure for a corona machine. It includes a high-voltage electrode retaining block, a ceramic countersunk screw, a corrosion-resistant and heat-resistant insulating nut, and a U-shaped ceramic electrode. Each high-voltage electrode retaining block has a lower groove at its center, and the corrosion-resistant and heat-resistant insulating nut is fixedly installed in the lower groove. The ceramic countersunk screw passes downwards through the high-voltage electrode retaining block and the corrosion-resistant and heat-resistant insulating nut, and then detachably mounts the high-voltage electrode retaining block on the discharge back side of the U-shaped ceramic electrode. Through various structural improvements, this utility model ensures the normal operation of the U-shaped ceramic electrode under prolonged high-frequency, high-voltage, and high-current discharge conditions, reduces the deformation of the U-shaped ceramic electrode, extends its lifespan, and significantly improves the adhesion of the foil material before treatment.

Description

Technical Field

[0001] This utility model belongs to the technical field of corona treatment equipment and related fields, and particularly relates to a high-voltage ceramic corona electrode structure for a corona machine. Background Technology

[0002] High-voltage ceramic corona electrodes are corona treatment devices used for material surface treatment. Through a high-frequency high-voltage generator, an alternating high voltage is applied to the metal core of a U-shaped ceramic electrode, creating a strong electric field between the electrode and the grounding roller, generating corona discharge. It is mainly used for surface treatment of materials such as plastic films and metal foils to improve their surface energy, thereby enhancing their coating, adhesion, or printing performance. High-voltage electrode retaining blocks refer to adding irregularly shaped fixing blocks to the back of a conventional U-shaped ceramic electrode discharge. By designing a fixed shape and fixing method, the electrode surface adheres to the irregularly shaped fixing block. However, during long-term, high-power discharge processes that generate high temperatures, corrosion, and deformation, it is often difficult to guarantee the uniformity, effectiveness, and ozone corrosion resistance of the strong discharge area, and it is also difficult to guarantee the normal working effect of the conventional U-shaped ceramic electrode.

[0003] To address these issues, CN209851579U discloses a U-shaped ceramic electrode, a corona structure, and a corona generator. The ceramic electrode includes a ceramic shell and an electrode post. The ceramic shell has recessed slots on opposite side walls, symmetrically arranged. The line connecting the two slots divides the ceramic shell into a locking section and a corona section. The electrode post is installed in the corona section. A heat dissipation hole is provided through the locking section to prevent damage from overheating. However, while the heat dissipation hole in the ceramic electrode can effectively prevent heat loss, in actual use, under prolonged high-frequency, high-voltage, and high-current discharge conditions, the heat dissipation hole is prone to stress concentration and deformation, leading to uncontrollable risks. Furthermore, the structural design of this ceramic electrode is not conducive to fixing the conductors inside, affecting the discharge effect. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide a high-voltage ceramic corona electrode structure for a corona machine. By improving the structural design and coordinating the various parts, the high-voltage electrode retaining block is detachably mounted on the discharge back of the U-shaped ceramic electrode. This ensures that the U-shaped ceramic electrode can dissipate heat well and function normally under long-term high-frequency, high-voltage, and high-current discharge conditions. It also reduces the deformation of the U-shaped ceramic electrode, extends its lifespan, and significantly improves the adhesion of the foil material before processing, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-voltage ceramic corona electrode structure for a corona machine includes a high-voltage electrode retention block. Each high-voltage electrode retention block has a groove at the center of its lower section, and a corrosion-resistant, heat-resistant, and insulating nut is fixedly installed in the groove. A ceramic countersunk screw passes through the high-voltage electrode retention block and the corrosion-resistant, heat-resistant, and insulating nut, and then detachably mounts the high-voltage electrode retention block on the discharge back side of the U-shaped ceramic electrode.

[0007] The high-voltage electrode retaining block is an integrated molded fixing block made of alumina. Its overall shape is I-shaped, and an upper groove is provided in the center of the upper section. A through hole is provided between the upper groove and the lower groove. The ceramic countersunk screw passes through the through hole of the high-voltage electrode retaining block and the corrosion-resistant and heat-resistant insulating nut, and the high-voltage electrode retaining block is detachably set on the discharge back of the U-shaped ceramic electrode.

[0008] The back of the U-shaped ceramic electrode discharge has multiple openings, the number of which is the same as the number of high-voltage retention blocks. The openings are positioned to correspond to the through holes, and their shapes match the ceramic countersunk screws. After passing through the openings, the ceramic countersunk screws extend into the interior of the U-shaped ceramic electrode, fixing the high-voltage retention blocks to the back of the U-shaped ceramic electrode discharge.

[0009] The corrosion-resistant and heat-resistant insulating nut installed in the groove of the electrode high-voltage retention block 1 is used to prevent the risk of point-like high-temperature zones caused by fixed-point openings.

[0010] The lower end face of the electrode high voltage retention block is coated with insulating adhesive to bond it to the surface that is in contact with the back of the discharge of the U-shaped ceramic electrode, thereby strengthening the connection between the electrode high voltage retention block and the U-shaped ceramic electrode.

[0011] The high-voltage electrode placement block has two symmetrical grooves formed by the inward indentation on both sides of the middle section. The U-shaped ceramic electrode is connected to a matching slot on the corona machine through the two grooves, so as to realize the rapid assembly of the U-shaped ceramic electrode on the corona machine.

[0012] During assembly, the groove surfaces on both sides of the middle section of the high-voltage retention block of the electrode need to be coated with insulating adhesive again for bonding, so as to strengthen the connection between the entire U-shaped ceramic electrode and the corona machine.

[0013] The U-shaped ceramic electrode includes a hollow, elongated U-shaped ceramic electrode tube. The U-shaped ceramic electrode tube is hollow inside, with a high-voltage output terminal at the front, a polytetrafluoroethylene rubber stopper at the rear, and a conductor in the middle.

[0014] The rear section of the high-voltage output terminal is located in the hollow part inside the U-shaped ceramic electrode tube, and the front section extends out of the U-shaped ceramic electrode tube to form an exposed metal electrode head, which directly participates in corona discharge.

[0015] The outer contour of the polytetrafluoroethylene rubber stopper matches the hollow position inside the U-shaped ceramic electrode tube, and is embedded in the rear section inside the U-shaped ceramic electrode tube to seal the U-shaped ceramic electrode and protect its internal structure.

[0016] The conductor is a high-density conductive filler. On the side facing the discharge back of the U-shaped ceramic electrode, there is a countersunk hole that matches the ceramic countersunk screw. After the ceramic countersunk screw passes through the opening of the U-shaped ceramic electrode, it extends into the interior of the conductor and reaches the countersunk hole, so that the conductor is fixed inside the U-shaped ceramic electrode and prevents the conductor from deflecting.

[0017] The plurality of high-voltage electrode retaining blocks are evenly spaced on the discharge back side of the U-shaped ceramic electrode, dividing the length of the U-shaped ceramic electrode into equal parts.

[0018] In summary, compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model improves the structure design by removing the high voltage retention block on the discharge back of the U-shaped ceramic electrode. This ensures good heat dissipation and normal use of the U-shaped ceramic electrode under long-term high-frequency, high-voltage, and high-current discharge conditions. It also reduces the deformation of the U-shaped ceramic electrode, extends the electrode's lifespan, and significantly improves the adhesion of the foil material before processing.

[0020] 2. In this utility model, the ceramic countersunk screw penetrates downwards through the high-voltage electrode retaining block and the corrosion-resistant and heat-resistant insulating nut. The high-voltage electrode retaining block is detachably set on the discharge back side of the U-shaped ceramic electrode. When the high-voltage electrode retaining block controls and fixes the electrode, the ceramic countersunk screw fills the opening, reducing the deformation and stress concentration of the U-shaped ceramic electrode. In conjunction with the corrosion-resistant and heat-resistant insulating nut, it can also avoid the risk of point-like high-temperature areas on the surface of the U-shaped ceramic electrode due to the opening. After the ceramic countersunk screw passes through the opening, it extends into the interior of the U-shaped ceramic electrode and reaches the countersunk hole, so that the conductor is reliably fixed inside the U-shaped ceramic electrode, preventing the conductor from deflecting and further ensuring the stability of the discharge.

[0021] 3. The overall structure of this utility model is simple. Through detachable connection methods such as bolts, it is possible to flexibly replace vulnerable parts such as electrode high voltage retention blocks and corrosion-resistant and heat-resistant insulating nuts, thereby extending the overall service life of the electrode.

[0022] 4. This utility model features two symmetrical grooves formed by inward indentation on both sides of the middle section of the I-shaped electrode high-voltage retention block, facilitating the overall installation and replacement of the product. When the electrode product is assembled onto the corona treatment machine, the two grooves and the matching slots on the machine are detachably connected, thereby reducing the difficulty of product assembly and improving replacement efficiency. This allows for the overall, rapid installation or replacement of the U-shaped ceramic electrode structure of this utility model on the corona treatment machine.

[0023] 5. In practical use, the number of high-voltage ceramic corona electrode structures can be selectively increased according to the working parameter requirements of different corona machines. Furthermore, an appropriate number of electrode high-voltage retention blocks can be set according to the length of the U-shaped ceramic electrode, allowing for flexible matching and adjustment of discharge parameters to achieve the technical effects of improving product quality and extending electrode life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional shape of the high-voltage ceramic corona electrode structure of the corona machine according to an embodiment of this utility model;

[0025] Figure 2 This is a top view schematic diagram of the high-voltage ceramic corona electrode structure of the corona machine according to an embodiment of the present invention;

[0026] Figure 3 This is a partially enlarged structural diagram of the high-voltage ceramic corona electrode structure of the corona machine according to an embodiment of this utility model;

[0027] Figure 4 This is a cross-sectional schematic diagram of the high-voltage ceramic corona electrode structure of the corona machine according to an embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the assembly structure of the high-voltage ceramic corona electrode structure of the corona machine according to an embodiment of this utility model;

[0029] Figure 6 This is an embodiment of the present utility model. Figure 5 Enlarged structural diagram of section A in the middle;

[0030] Figure 7 This is an embodiment of the present utility model. Figure 5 Enlarged structural diagram of section B in the middle;

[0031] Figure 8 This is an embodiment of the present utility model. Figure 5 Enlarged structural diagram of section C.

[0032] In the picture:

[0033] 1. Electrode high-voltage retention block;

[0034] 2. Ceramic countersunk screw; 21. Through hole; 22. Open hole; 23. Countersunk hole;

[0035] 3. Corrosion-resistant, heat-resistant, and insulating nuts;

[0036] 4. U-shaped ceramic electrode; 41. U-shaped ceramic electrode tube; 42. High voltage output terminal; 43. Polytetrafluoroethylene rubber stopper; 44. Conductor. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0038] Example

[0039] This utility model provides a newly designed high-voltage ceramic corona electrode structure for a corona machine. The main focus is on improving the structural design from multiple aspects to address various shortcomings of existing products. This solves problems such as deformation, poor discharge effect, and short lifespan of the U-shaped ceramic electrode during high-voltage discharge. It ensures that the U-shaped ceramic electrode can be used normally under voltage discharge conditions, reduces the deformation and stress concentration of the U-shaped ceramic electrode under long-term high-frequency, high-voltage, and high-current discharge conditions, improves the adhesion of the foil material before processing, and extends the electrode lifespan.

[0040] Please refer to the details. Figure 1-8 This utility model provides a high-voltage ceramic corona electrode structure for a corona machine, which includes a high-voltage electrode retention block 1. Each high-voltage electrode retention block 1 has a groove inside the lower center position, and a corrosion-resistant and heat-resistant insulating nut 3 is fixedly installed in the groove. The ceramic countersunk screw 2 passes through the high-voltage electrode retention block 1 and the corrosion-resistant and heat-resistant insulating nut 3, and then the high-voltage electrode retention block 1 is detachably installed on the discharge back side of the U-shaped ceramic electrode 4.

[0041] The fixed shape of the electrode high voltage retention block 1 is an integrally molded fixed block (solid) made of alumina. Its overall shape is I-shaped. There is an upper groove in the center of the upper section. There is a through hole 21 between the upper groove and the lower groove. After the ceramic countersunk screw 2 passes through the through hole 21 and the corrosion-resistant and heat-resistant insulating nut 3 of the electrode high voltage retention block 1, the electrode high voltage retention block 1 is detachably set on the discharge back of the U-shaped ceramic electrode 4.

[0042] This invention uses a ceramic countersunk screw 2 and a corrosion-resistant and heat-resistant insulating nut 3 to form a detachable connection between the high-voltage electrode retaining block 1 and the U-shaped ceramic electrode 4. Multiple openings 22 are provided on the discharge back of the U-shaped ceramic electrode 4 to assist in heat dissipation and ventilation. The number of openings 22 is the same as the number of high-voltage electrode retaining blocks 1, their positions correspond to the through holes 21, and their shapes match the ceramic countersunk screw 2, facilitating the insertion of the front end of the ceramic countersunk screw 2 into the through hole 21. After passing through the opening 22, the front end of the ceramic countersunk screw 2 extends into the interior of the U-shaped ceramic electrode 4, fixing the high-voltage electrode retaining block 1 to the discharge back of the U-shaped ceramic electrode 4. The lower end face of the high-voltage electrode retaining block 1 or the lower end face of the corrosion-resistant and heat-resistant insulating nut 3 is pre-bonded to the discharge back side of the U-shaped ceramic electrode 4. The cooperation between the ceramic countersunk screw 2 and the corrosion-resistant and heat-resistant insulating nut 3 can, on the one hand, strengthen the connection reliability between the high-voltage electrode retaining block 1 and the U-shaped ceramic electrode 4, and on the other hand, reduce the overall or local deformation of the U-shaped ceramic electrode 4 under long-term high-frequency, high-voltage, and high-current discharge conditions, prevent the deformation of the electrode surface from affecting the corona treatment effect of the U-shaped ceramic electrode 4 during operation, and extend the service life of the U-shaped ceramic electrode 4.

[0043] Because a fixed opening 22 is made on the discharge back of the U-shaped ceramic electrode 4, the surface strength of the U-shaped ceramic electrode 4 is worse than that of the original structure. Under long-term high-frequency, high-voltage, and high-current discharge conditions, there is a risk of point-like high-temperature areas being generated at the opening. If the electrode high-voltage retention block 1 and the surface of the U-shaped ceramic electrode 4 are completely fixed, the temperature conduction between the ceramic shells is faster, and the temperature is more likely to be uneven inside the conductor 44. This will significantly reduce the mechanical strength and load-bearing capacity of the U-shaped ceramic electrode 4 shell. In severe cases, it may even cause the surface of the U-shaped ceramic electrode 4 shell to crack, resulting in a series of serious consequences that directly affect the corona treatment effect and the safety of equipment use. However, the electrode high-voltage retention block 1 and the U-shaped ceramic electrode 4 of this utility model adopt a threaded connection with adjustable connection strength. The gap and pressure between them can be adjusted. A ceramic countersunk screw 2 (non-hollow structure) is provided in the opening 22, which can effectively solve the above problems.

[0044] The U-shaped ceramic electrode 4 includes a U-shaped ceramic electrode tube 41, a high-voltage output terminal 42, a polytetrafluoroethylene (PTFE) stopper 43, and a conductor 44. The high-voltage output terminal 42 is located at the front end of the U-shaped ceramic electrode tube 41, the PTFE stopper 43 at the rear end, and the conductor 44 in the middle. The rear end of the high-voltage output terminal 42 is positioned within the hollow space of the U-shaped ceramic electrode tube 41, while the front end extends beyond the tube, forming an exposed metal electrode head that directly participates in corona discharge. The PTFE stopper 43's outline matches the hollow space within the U-shaped ceramic electrode tube 41, and it is embedded within the rear end of the tube, sealing the U-shaped ceramic electrode 4 and protecting its internal structure. The conductor 44 is a high-density conductive filler that conducts high-voltage electrical energy. On one side of the discharge back of the U-shaped ceramic electrode 4, a countersunk hole 23 matching the ceramic countersunk screw 2 is provided. After the ceramic countersunk screw 2 passes through the opening 22 of the U-shaped ceramic electrode 4, it extends into the interior of the conductor 44 and reaches the countersunk hole 23, so that the conductor 44 is fixed inside the U-shaped ceramic electrode 4, restricting the lateral displacement of the conductor 44, preventing the conductor 44 from deflecting forward or backward, avoiding unstable discharge, reduced output effectiveness and other related risks, and avoiding the situation where the adhesion level of the foil does not meet the quality requirements.

[0045] In this embodiment, two symmetrical grooves are formed on the concave sides of the middle section of the electrode high-voltage retention block 1. These grooves can be connected to matching slots on the corona machine, facilitating the rapid assembly of the entire electrode structure onto the corona machine. During assembly, insulating adhesive can be applied to the surfaces of the two grooves. After the adhesive is spread evenly, the U-shaped ceramic electrode 4 is inserted into the slot of the corona machine to reinforce the connection between the U-shaped ceramic electrode 4 and the corona machine. After installation, a corona discharge test is performed. Once the test is passed, production can begin.

[0046] In this embodiment, three high-voltage electrode retaining blocks 1 are evenly spaced on the discharge back side of the U-shaped ceramic electrode 4, dividing the length of the U-shaped ceramic electrode 4 into equal parts. Under different operating conditions and parameters, the user can selectively increase the number of electrode structures on the corona machine and choose an appropriate number of high-voltage electrode retaining blocks 1 fixed according to the length of the U-shaped ceramic electrode 4, allowing for flexible adjustment to meet the needs of flexible production. This invention can be used by simply inserting it into the corona machine; if damaged, it can be removed as a whole, repaired, and then reinstalled.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-voltage ceramic corona electrode structure for a corona machine, characterized in that, Includes multiple high-voltage electrode retaining blocks (1), ceramic countersunk screws (2), corrosion-resistant and heat-resistant insulating nuts (3), and U-shaped ceramic electrodes (4); Each of the high voltage electrode retention blocks (1) has a groove in the lower section, and the corrosion-resistant and heat-resistant insulating nut (3) is fixedly installed in the groove. After the ceramic countersunk screw (2) passes through the high voltage electrode retention block (1) and the corrosion-resistant and heat-resistant insulating nut (3) downwards, the high voltage electrode retention block (1) is detachably installed on the discharge back side of the U-shaped ceramic electrode (4).

2. The high-voltage ceramic corona electrode structure of the corona machine according to claim 1, characterized in that, The electrode high voltage retention block (1) is an alumina fixing block with an overall I-shaped outline. The upper section is also provided with an upper groove, and a through hole (21) is provided between the upper groove and the lower groove. After the ceramic countersunk screw (2) passes through the through hole (21) of the electrode high voltage retention block (1) and the corrosion-resistant and heat-resistant insulating nut (3), the electrode high voltage retention block (1) is detachably set on the discharge back of the U-shaped ceramic electrode (4).

3. The high-voltage ceramic corona electrode structure of the corona machine according to claim 1, characterized in that, The back of the U-shaped ceramic electrode (4) is provided with multiple openings (22). The number of openings (22) is the same as the number of high voltage retention blocks (1) of the electrode. Their positions correspond to each through hole (21), and their shapes match the ceramic countersunk screw (2). After the ceramic countersunk screw (2) passes through the opening (22), it extends into the interior of the U-shaped ceramic electrode (4).

4. The high-voltage ceramic corona electrode structure of the corona machine according to claim 1, characterized in that, The lower end face of the high voltage electrode retainer block (1) is bonded to the discharge back side of the U-shaped ceramic electrode (4).

5. The high-voltage ceramic corona electrode structure of the corona machine according to claim 1, characterized in that, The circular ceramic electrode (4) includes a circular ceramic electrode tube (41), which is hollow inside. The front section is provided with a high voltage output terminal (42), the rear section is provided with a polytetrafluoroethylene rubber stopper (43), and the middle section is provided with a conductor (44).

6. The high-voltage ceramic corona electrode structure of the corona machine according to claim 5, characterized in that, The rear section of the high-voltage output terminal (42) is located in the hollow position inside the U-shaped ceramic electrode tube (41), and the front section extends out of the U-shaped ceramic electrode tube (41) to form an exposed metal electrode head.

7. The high-voltage ceramic corona electrode structure of the corona machine according to claim 5, characterized in that, The outer contour of the polytetrafluoroethylene rubber stopper (43) matches the position of the hollow interior of the U-shaped ceramic electrode tube (41), and is embedded in the rear section of the interior of the U-shaped ceramic electrode tube (41).

8. The high-voltage ceramic corona electrode structure of the corona machine according to claim 5, characterized in that, The conductor (44) is a high-density conductive filler. On the side facing the discharge back of the U-shaped ceramic electrode (4), there is a countersunk hole (23) that matches the ceramic countersunk screw (2). After the ceramic countersunk screw (2) passes through the opening (22) of the U-shaped ceramic electrode (4), it extends into the interior of the conductor (44) and reaches the countersunk hole (23).

9. The high-voltage ceramic corona electrode structure of the corona machine according to claim 1, characterized in that, The multiple high-voltage electrode retaining blocks (1) are evenly spaced on the discharge back side of the U-shaped ceramic electrode (4), dividing the length of the U-shaped ceramic electrode (4) into equal parts.

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