A device and method for processing zinc oxide resistor sheets for lightning arresters

Abstract

The present invention discloses a device and method for processing zinc oxide resistor sheets for lightning arresters. The device comprises a processing drum and a filter drum. The processing drum is disposed above the filter drum. A crushing assembly is disposed within the processing drum for crushing bulk zinc oxide raw materials. A graded grinding mechanism is disposed below the crushing assembly. The graded grinding mechanism comprises a first grinding assembly, a second grinding assembly, and a third grinding assembly, disposed sequentially from top to bottom. A vibrating mechanism is disposed between the crushing assembly and the first grinding assembly to prevent the accumulation of zinc oxide particles. A filter mechanism is symmetrically disposed above and below the filter drum, and a feeding mechanism is disposed below the filter mechanism. In the present invention, the graded grinding mechanism can significantly improve the particle uniformity of zinc oxide powder, ensuring that the particle size of the zinc oxide powder meets the standard for subsequent processing.

Description

Technical Field

[0001] The present invention relates to the technical field of zinc oxide resistor processing, and in particular to a device and method for processing zinc oxide resistors for lightning arresters. Background Art

[0002] Zinc oxide varistors, due to their excellent nonlinear characteristics, fast response, and maintenance-free design, have become a core component of lightning arresters and a key technology for overvoltage protection in power systems. Therefore, improving the structural and compositional uniformity of zinc oxide varistors is crucial for improving current carrying capacity. Furthermore, the particle size of the zinc oxide powder used to make zinc oxide varistors significantly influences their post-firing performance. Finer powders allow for easier mixing, resulting in more consistent microstructure and electrical properties of the grain boundary layer after firing, and greater current carrying capacity.

[0003] Since nano-scale (20-100 nm) zinc oxide powder is a common choice for high-performance lightning arresters, wet nano-grinding technology is preferred when producing zinc oxide powder. This technology can reduce the maximum particle size of zinc oxide powder to below 100 nm, and the zinc oxide resistor produced will have better performance in actual use.

[0004] At present, the process of producing zinc oxide powder by wet grinding is:

[0005] 1. Raw material pretreatment: Zinc-containing raw materials must first be crushed and dry-ground to a certain particle size (usually <200 mesh) to ensure sufficient subsequent leaching reaction;

[0006] 2. Slurry preparation and dispersion: Mix the pretreated raw materials with a solvent and a dispersant to form a uniform suspension. The amount of dispersant used is usually 1–5% of the raw material mass.

[0007] ‌3. Wet grinding and refining‌: Using a sand mill or ultrasonic nano-grinding equipment, the particles are refined to the nanoscale (<100nm) through a combination of mechanical shearing and high-frequency vibration;

[0008] ‌4. Impurity Removal and Purification‌: The polishing slurry is purified through chemical precipitation, displacement reaction, or centrifugal filtration to remove impurities and ensure the purity of the solution;

[0009] 5. Solid-liquid separation and drying: The purified slurry is dehydrated by a filter press or centrifuge to obtain a wet zinc oxide filter cake. This is then dried by spray drying or low-temperature vacuum drying to produce a dry powder, preventing particle agglomeration.

[0010] 6. Post-processing calcination: The dried powder is calcined at 400–500°C to optimize the crystal form and remove residual organic matter, ultimately obtaining high-purity nano zinc oxide powder.

[0011] In the above wet grinding process, the first step is to crush the zinc-containing raw material and then use dry grinding to a certain particle size. This step requires grinding equipment to process the zinc-containing raw material.

[0012] After searching, the invention patent document with announcement number CN118681661A discloses a zinc oxide raw material grinding equipment, including a first bracket and a crushing mechanism. The crushing mechanism is provided at the upper end of the first bracket, and a crushing mechanism is provided below the crushing mechanism. A discharge structure is connected below the crushing mechanism. A second bracket is provided on one side of the first bracket. The crushing mechanism includes a first shell, a crushing chamber, a limit rod, a telescopic rod, a crushing blade and a first motor. The crushing mechanism includes a second shell, a large gear, a small gear, a second motor, a crushing chamber and a grinding roller. The discharge structure includes a discharge hopper and a stirring rod.

[0013] In the process of crushing the zinc oxide raw material, the above-mentioned grinding equipment uses a crushing blade to crush the zinc oxide raw material. According to the drawings in the specification provided in the above-mentioned patent document, a portion of the crushed zinc oxide raw material will accumulate in the crushing chamber and cannot fall. If the accumulation is too much, it will cause blockage in the crushing chamber, affecting the subsequent grinding process; and the above-mentioned grinding equipment uses two symmetrically arranged grinding rollers to grind the zinc oxide particles. The particle uniformity and particle size of the obtained zinc oxide powder cannot be guaranteed, which will affect the use effect of the finished zinc oxide resistor. Summary of the Invention

[0014] The purpose of the present invention is to provide a zinc oxide resistor processing device and method for lightning arresters, which can significantly improve the particle uniformity of zinc oxide powder through a graded grinding mechanism, ensuring that the particle size of the zinc oxide powder meets the standard for subsequent processing.

[0015] The present invention adopts the following technical solutions:

[0016] A zinc oxide resistor sheet processing device for a lightning arrester includes a processing cylinder and a filter cylinder. The processing cylinder is arranged above the filter cylinder. A crushing component for crushing zinc oxide raw materials is arranged in the processing cylinder. A grading grinding mechanism is arranged below the crushing component. The grading grinding mechanism includes a first grinding component, a second grinding component and a third grinding component arranged in sequence from top to bottom. A vibration mechanism is arranged between the crushing component and the first grinding component to prevent the accumulation of zinc oxide particles. A filtering mechanism is symmetrically arranged in the filter cylinder, and a feeding mechanism is arranged below the filtering mechanism.

[0017] Optionally, the first grinding assembly includes a connecting seat, a first grinding ring and a first grinding base arranged in sequence from top to bottom, the inclination of the lower end surface of the first grinding ring corresponds to the inclination of the sector ring surface of the first grinding base, and the lower end surface of the first grinding ring is fixedly provided with a plurality of grinding blocks 1 in a circular shape, and the gap between the grinding block 1 and the sector ring surface of the first grinding base is the first grinding space.

[0018] Optionally, the second grinding assembly includes a second grinding disc and a second grinding base fixed on the inner wall of the processing cylinder, the second grinding base is provided with a second grinding surface adapted to the second grinding disc, a plurality of grinding blocks 2 are fixedly arranged in a circle on the fan ring surface of the second grinding disc, the gap between the grinding block 2 and the second grinding surface is a second grinding space, and the second grinding space is communicated with the first grinding space.

[0019] Optionally, the third grinding assembly includes a hollow connecting shaft, a material guide funnel, a third grinding disc and a third grinding base arranged in sequence from top to bottom. The material guide funnel is fixedly sleeved on the circumferential surface of the connecting shaft. The connecting shaft is located in the material guide funnel and has a plurality of material discharge troughs circumferentially opened on the circumferential surface of the connecting shaft that are connected to the material guide funnel and the inner cavity of the connecting shaft. The material guide funnel is rotatably arranged on the lower end surface of the second grinding base and is connected to the second grinding space. A plurality of grinding balls are fixedly arranged on the lower end surface of the third grinding disc. The grinding balls are in contact with the upper surface of the third grinding base. The gaps between the plurality of grinding balls cooperate with the third grinding base to form a third grinding space.

[0020] Optionally, a cover plate 1 is installed on the upper end of the processing cylinder, and a feed funnel is fixedly provided in the middle of the upper end surface of the cover plate 1. The feed funnel is communicated with the interior of the processing cylinder, and a drive assembly for driving the crushing assembly, the vibration mechanism and the grading grinding mechanism is fixedly provided on the upper end surface of the cover plate 1 away from the feed funnel. The drive assembly includes a drive motor and a rotating shaft.

[0021] Optionally, the crushing assembly includes gear 2, a ring sleeve and a conical support seat, the ring sleeve is arranged on the inner ring of gear 2 and is on the same horizontal plane as gear 2, a number of crushing tools 1 are circumferentially fixedly connected between the outer circumferential surface of the ring sleeve and the inner circumferential surface of gear 2, and the ring sleeve is fixedly mounted on the circumferential surface of the rotating shaft; a number of inclined crushing tools 2 are circumferentially fixedly mounted between the fan ring surface of the support seat and the lower end surface of gear 2, and the support seat is fixedly mounted on the circumferential surface of the rotating shaft.

[0022] Optionally, the vibration mechanism includes a support frame 1 and a rotating disk arranged inside the support frame 1, the upper end surface of the support frame 1 is installed with a cover plate 2, the upper end surface of the cover plate 2 and the lower end surface of the support frame 1 are respectively provided with a damping pad 1 and a damping pad 2, the damping pad 1 is fixed to the lower end surface of the support seat 1 and rotates with the rotating shaft, the damping pad 2 is fixed to the lower end surface of the support frame 1 and is fixed to the first grinding base, the inner wall of the support frame 1 is circumferentially fixed with a plurality of vibration partitions, the circumferential surface of the rotating disk is circumferentially fixed with a plurality of baffles, and a vibration component for knocking the vibration partition is provided between two adjacent baffles.

[0023] Optionally, an annular support plate 1 is fixedly provided on the lower end surface of the processing cylinder, an annular top plate is fixedly installed on the upper end surface of the filter cylinder, and a support cylinder 2 is fixedly provided on the middle surface of the top plate. The position of the support cylinder 2 corresponds to the position of the processing cylinder, and a flexible connecting ring is fixedly connected between the support cylinder 2 and the processing cylinder.

[0024] Optionally, the filter mechanism includes an annular support plate 2, an annular support frame 2 and a support cylinder 2, the upper surface of the annular support plate 2 is provided with several sliding plates for circumferential sliding, and L-shaped guide rails fixed to the annular support plate 2 are symmetrically provided on both sides of the sliding plate, and a fan-shaped filter plate is fixedly provided at a position near the center of the annular support plate 2 on the sliding plate, and the several filter plates can be combined to form a circular plate-shaped structure, the annular support frame 2 is fixedly provided on the upper end surface of the annular support plate 2, and a gap is left between the upper inner wall surface of the annular support frame 2 and the filter plate after installation, and a slider is installed on the upper end surface of the sliding plate, and a rectangular slide groove is provided at the upper end surface of the annular support frame 2 corresponding to the slider, and the slider is slidably arranged in the slide groove, and a connecting hole is provided on the upper end surface of the annular support frame 2 away from the slide groove, and a plurality of pushing components for merging the filter plates are provided on the circumferential surfaces of the support cylinder 1 and the support cylinder 2.

[0025] Optionally, a gap is left between the lower end surface of support tube one and the upper end surface of upper support tube two, and a gap is also left between the lower end surface of upper support tube two and the upper end surface of lower support tube two. An annular groove is provided on the upper end surface of support tube two, and a closed ring is slidably arranged in the annular groove. A spring two is fixedly connected between the closed ring and the inner bottom surface of the annular groove.

[0026] A method for processing a zinc oxide resistor for a lightning arrester comprises the following steps:

[0027] S1. Use wet grinding process to refine the zinc oxide raw materials into particles:

[0028] First, the zinc oxide raw material is pretreated, i.e., it is crushed and ground using a processing device. The pretreated zinc oxide raw material is then slurried and dispersed. The dispersed material is then wet-ground and refined. The refined material is then cleaned of impurities and purified. The purified material is then subjected to solid-liquid separation and dried. Finally, the material is post-processed and calcined to obtain high-purity nano zinc oxide powder.

[0029] S2, mixing zinc oxide powder with auxiliary materials;

[0030] S3, granulating and pressing the mixed powder;

[0031] S4, pre-sintering and high-temperature sintering the formed embryonic body;

[0032] S5, grinding and cleaning the surface of the sintered sheet-shaped zinc oxide resistor and then performing electrode processing;

[0033] S6. Conduct volt-ampere characteristic test and current flow test on zinc oxide resistor.

[0034] In summary, the present invention has the following beneficial effects:

[0035] 1. In the present invention, the particle size of the zinc oxide powder can be gradually reduced by grinding spaces of different sizes in the graded grinding mechanism, thereby effectively improving the particle uniformity of the zinc oxide powder and ensuring that the particle size of the zinc oxide particles meets the standard for subsequent processing;

[0036] 2. In the present invention, the crushing mechanism, the vibrating mechanism and the graded grinding mechanism all use the same driving device, which greatly reduces the use of driving components and avoids the control circuit being too complicated, resulting in higher production costs;

[0037] 3. In the present invention, the rotating disk is driven to rotate by the rotating shaft, thereby causing the vibrating block to hit the vibrating partition, which generates vibration. The vibration is transmitted to the support frame 1, which can vibrate the zinc oxide particles accumulated on the annular surface of the support frame 1, allowing them to enter the first grinding space more smoothly without causing accumulation at the inlet of the first grinding space.

[0038] 4. In the present invention, by alternately using two sets of filtering mechanisms, the zinc oxide particles can be continuously filtered without stopping the machine to clean the filtered material, which greatly improves the processing efficiency of zinc oxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2It is a partial structural schematic diagram of the present invention;

[0041] Figure 3 For the present invention Figure 2 sectional view of

[0042] Figure 4 is a schematic structural diagram of the third grinding mechanism of the present invention;

[0043] Figure 5 It is a structural schematic diagram of the crushing assembly of the present invention;

[0044] Figure 6 It is a structural schematic diagram of the vibration mechanism of the present invention;

[0045] Figure 7 It is a structural schematic diagram of the rotating disk of the present invention;

[0046] Figure 8 It is a cross-sectional view of the overall structure of the present invention;

[0047] Figure 9 For the present invention Figure 8 A detailed enlarged view of point A;

[0048] Figure 10 It is a structural schematic diagram of the graded grinding mechanism of the present invention;

[0049] Figure 11 is a cross-sectional view of the graded grinding mechanism of the present invention;

[0050] Figure 12 For the present invention Figure 11 A magnified view of the detail at point B;

[0051] Figure 13 For the present invention Figure 11 A magnified view of the detail at point C;

[0052] Figure 14 For the present invention Figure 11 A magnified view of the detail at point D;

[0053] Figure 15 This is a schematic diagram of the internal structure of the filter frame of the present invention;

[0054] Figure 16 It is a structural schematic diagram of the filtering mechanism of the present invention;

[0055] Figure 17 A cross-sectional view of the filter cartridge of the present invention Figure 1 ;

[0056] Figure 18 A cross-sectional view of the filter cartridge of the present invention Figure 2 ;

[0057] Figure 19For the present invention Figure 17 A magnified view of the detail at E;

[0058] Figure 20 For the present invention Figure 18 Enlarged detail of point F.

[0059] In the figure, 1, processing cylinder; 2, filter cylinder; 3, base 1; 31, support rod 1; 4, base 2; 41, support rod 2; 5, drive motor; 51, fixing frame; 52, rotating shaft; 53, feed funnel; 6, vibration mechanism; 7, filter mechanism; 9. Feeding mechanism; 11. Annular support plate 1; 111. Connecting block; 112. Second grinding base; 1121. Second grinding surface; 113. Support sleeve; 114. Air intake hole; 12. First grinding ring; 121. Grinding block 1; 122. First feeding port; 13. Second grinding disc; 131. Grinding block; 14. First grinding base; 141. Support tube 1; 142. Bottom plate; 15. Connecting seat; 151. Support ring; 152. Internal gear ring; 153. Gear 1; 16. Cover plate 1; 161. Fixed shaft; 17. Crushing assembly; 171. Gear 2; 172. Ring sleeve; 173. Crushing tool 1; 174. Crushing tool 2; 175. Support seat; 18. Third grinding base; 181. Support tube 2; 21. Top plate; 211. Support tube 1; 22. Flexible connection Ring; 221, second unloading space; 23, support cylinder 2; 231, annular groove; 232, spring 2; 233, closing ring; 61, support frame 1; 611, vibration diaphragm; 62, cover plate 2; 63, damping pad 1; 64, damping pad 2; 65, rotating disk; 651, baffle; 652, vibration block; 653, spring 1; 654, damping ring; 66, tightening nut; 71, annular support Plate 2; 711, guide rail; 72, annular support frame 2; 721, slide groove; 722, connecting hole; 73, telescopic cylinder; 731, hinge seat 1; 732, hinge seat 2; 74, sliding plate; 741, slider; 742, filter plate; 81, third grinding disc; 82, material guide funnel; 83, connecting shaft; 831, discharge chute; 91, material guide barrel; 92, discharge funnel; 93, vibration motor. DETAILED DESCRIPTION

[0060] The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0061] See also Figure 1-20 The present invention will be described in detail below with reference to the accompanying drawings and embodiments:

[0062] Example 1:

[0063] like Figure 1-2As shown, a zinc oxide resistor sheet processing device for lightning arresters includes a processing cylinder 1 and a filter cylinder 2. The processing cylinder 1 is arranged above the filter cylinder 2. A crushing assembly 17 for crushing bulk zinc oxide raw materials is provided in the processing cylinder 1. The crushing assembly 17 can crush the bulk zinc oxide raw materials into large particles of zinc oxide material.

[0064] A graded grinding mechanism is provided below the crushing assembly 17. Large particles of zinc oxide can be made into small particles of powdered zinc oxide material after passing through the graded grinding mechanism. The graded grinding mechanism includes a first grinding assembly, a second grinding assembly and a third grinding assembly arranged in sequence from top to bottom.

[0065] A filter mechanism 7 for reprocessing the ground zinc oxide powder is symmetrically arranged in the filter cartridge 2. The filter mechanism 7 can screen the zinc oxide powder particles with larger particle sizes.

[0066] A feeding mechanism 9 is provided below the filtering mechanism 7. After the zinc oxide powder is filtered and its particle size meets the standard for subsequent processing, the zinc oxide powder is introduced into an external collection device through the feeding mechanism 9. The above-mentioned collection device is prior art and will not be drawn or described in detail here.

[0067] A vibration mechanism 6 is provided between the crushing assembly 17 and the first grinding assembly, and the vibration mechanism 6 vibrates the crushed zinc oxide particles to prevent the zinc oxide particles from accumulating at the feed inlet of the first grinding assembly and causing blockage, thereby affecting the grinding efficiency.

[0068] like Figure 1-2 As shown, in this embodiment, the lower end surface of the processing cylinder 1 is fixedly provided with an annular support plate 11, the upper end surface of the filter cylinder 2 is fixedly installed with an annular top plate 21, and the middle surface of the top plate 21 is fixedly provided with a support cylinder 23. The position of the support cylinder 23 corresponds to the position of the processing cylinder 1, and a flexible connecting ring 22 is fixedly connected between the support cylinder 23 and the processing cylinder 1. The flexible connecting ring 22 can prevent the vibration generated by the lower filter cylinder 2 during operation from affecting the grinding process in the processing cylinder 1. The above-mentioned flexible connecting ring 22 is a prior art and will not be drawn or described in detail here.

[0069] like Figure 1-2As shown, in this embodiment, an annular base 1 3 and a circular base 2 4 are provided below the filter cartridge 2. Both the base 1 3 and the base 2 4 are fixedly mounted on the ground and do not contact each other. The upper end surface of the base 1 3 is circumferentially fixed with a plurality of support rods 1 31, and the upper end surface of the base 2 4 is circumferentially fixed with a plurality of support rods 2 41. The support rods 1 31 are higher than the support rods 2 41. The upper end surface of the support rods 2 41 is fixed to the lower end surface of the filter cartridge 2, and the filter cartridge 2 is supported by the support rods 2 41. The outer circumferential surface of the annular support plate 1 is circumferentially fixed with the same number of connecting blocks 111 as the support rods 1 31. The connecting blocks 111 are fixed to the side surfaces of the support rods 1 31 by bolts, and the annular support plate 11 is supported by the support rods 1 31.

[0070] like Figure 1 As shown, in this embodiment, a cover plate 16 is fixedly provided on the upper end surface of the processing cylinder 1 by bolts, a feed funnel 53 is fixedly provided in the middle of the upper end surface of the cover plate 16, the feed funnel 53 is communicated with the interior of the processing cylinder 1, and a drive assembly is fixedly provided at a position on the upper end surface of the cover plate 16 away from the feed funnel 53, and the drive assembly is used to provide driving force to the crushing assembly 17, the vibration mechanism 6, the first grinding assembly, the second grinding assembly and the third grinding assembly inside the processing cylinder 1.

[0071] like Figure 1 As shown, in this embodiment, the driving assembly includes an inverted U-shaped fixing frame 51, a driving motor 5 and a rotating shaft 52. The driving motor 5 is fixedly arranged on the upper end surface of the fixing frame 51, and the output shaft of the driving motor 5 passes through the upper end surface of the fixing frame 51 and rotates together. The rotating shaft 52 is fixedly arranged on the lower end surface of the output shaft of the driving motor 5, and the rotating shaft 52 extends to the inside of the processing cylinder 1. The rotating shaft 52 is driven by the driving motor 5 to rotate. The above-mentioned driving motor 5 is a prior art and will not be drawn or described in detail here.

[0072] Specifically, the blocky zinc oxide raw material is introduced into the feed funnel 53 through the feeding device, the zinc oxide raw material is crushed by the crushing component 17, and then enters the first grinding component. After the first grinding by the first grinding component, it enters the second grinding component and then performs the second grinding. After the grinding by the second grinding component, it enters the third grinding component and then performs the third grinding. After the third grinding, it enters the filter cylinder 2 below for filtration. After three grinding processes, the particle size of the zinc oxide powder will gradually decrease, and the particle uniformity of the zinc oxide powder will be significantly improved, which will help the subsequent refinement of the zinc oxide powder. The above-mentioned feeding device is a prior art and will not be drawn or described in detail here.

[0073] like Figure 2 and Figure 5As shown, in this embodiment, the crushing assembly 17 includes an annular gear 2 171, a ring sleeve 172 and a frustum-shaped support seat 175. The ring sleeve 172 is arranged on the inner ring of the gear 2 171 and is on the same horizontal plane as the gear 2 171. A plurality of crushing cutters 173 are circumferentially fixedly connected between the outer circumferential surface of the ring sleeve 172 and the inner circumferential surface of the gear 2 171. The ring sleeve 172 is fixedly sleeved on the circumferential surface of the rotating shaft 52.

[0074] A plurality of inclined crushing cutters 174 are fixedly arranged circumferentially between the fan ring surface of the support seat 175 and the lower end surface of the gear 2 171 . The support seat 175 is fixedly sleeved on the circumferential surface of the rotating shaft 52 .

[0075] Specifically, the zinc oxide raw material is poured into the feeding funnel 53, and the driving motor 5 drives the rotating shaft 52 to rotate, driving the crushing tool 1 173 and the crushing tool 2 174 to move to crush the zinc oxide raw material. The crushing tool 173 is used to perform the first crushing process on the zinc oxide raw material, and the crushing tool 2 174 is used to perform the second crushing process on the zinc oxide raw material. By crushing the zinc oxide raw material twice, the crushing effect of the zinc oxide raw material can be effectively improved, and after reducing the particle size of the zinc oxide raw material particles, it is effectively avoided that the zinc oxide particles are blocked at the feed port of the first grinding component, affecting the subsequent grinding process of the zinc oxide particles.

[0076] like Figure 2-14 As shown, in this embodiment, the first grinding assembly includes a connecting seat 15, a first grinding ring 12 and a first grinding base 14 arranged in sequence from top to bottom. The first grinding base 14 is arranged in a truncated cone shape. The inclination of the lower end surface of the first grinding ring 12 corresponds to the inclination of the sector ring surface of the first grinding base 14. The lower end surface of the first grinding ring 12 is fixedly provided with a plurality of grinding blocks 121 in a circumferential manner. The gap between the grinding blocks 121 and the sector ring surface of the first grinding base 14 is the first grinding space.

[0077] A first feeding port 122 is provided in the middle of the first grinding ring 12, so that the crushed zinc oxide raw material can enter the first grinding space through the first feeding port 122;

[0078] Grinding block 121 consists of half a cone and half a cylinder. The cone is located close to the first feed inlet 122. The bottom diameter of the cone is the same as the end diameter of the cylinder. The gap between the cone and the first grinding base is gradually reduced to facilitate the entry of zinc oxide particles into the first grinding space.

[0079] like Figure 2-14As shown, in this embodiment, an annular support sleeve 113 is fixedly provided on the inner wall surface of the inner cavity of the processing cylinder 1 near the upper end surface, and the connecting seat 15 is rotatably set on the inner ring of the support sleeve 113. A support ring 151 is fixedly provided on the circumferential surface of the connecting seat 15 near the upper end, and the support ring 151 is rotatably set on the upper end surface of the support sleeve 113. The support ring 151 is used to support the connecting seat 15.

[0080] like Figure 2-14 As shown, in this embodiment, an internal meshing gear ring 152 is fixedly provided on the upper end surface of the connecting seat 15, and the internal meshing gear ring 152 and gear 2 171 are on the same horizontal plane. A plurality of gears 153 are circumferentially arranged between the internal meshing gear ring 152 and gear 2 171. The rotation of gear 2 171 drives the rotation of gear 1 153, and then drives the rotation of the internal meshing gear ring 152. The rotation of the internal meshing gear ring 152 drives the connecting seat 15 below to rotate, and then drives the rotation of the first grinding ring 12.

[0081] like Figure 3 As shown, in this embodiment, the lower surface of the cover plate is fixedly provided with a ring-shaped fixed shaft 161 with the same number as the gear 1 153, and the gear 1 153 is rotatably provided on the circumferential surface of the fixed shaft 161.

[0082] like Figure 6-7 As shown, in this embodiment, the vibration mechanism 6 includes a truncated cone-shaped support frame 61 and an annular rotating disk 65 arranged inside the support frame 61. The upper end surface of the support frame 61 is fixed with a cover plate 62 by bolts. The upper end surface of the cover plate 62 and the lower end surface of the support frame 61 are respectively provided with a damping pad 63 and a damping pad 64. The damping pad 63 is fixed to the lower end surface of the support seat 175 and rotates with the rotating shaft 52. The damping pad 64 is fixed to the lower end surface of the support frame 61 and is fixed to the first grinding base 14.

[0083] Specifically, the damping pad 1 63 and the damping pad 2 64 are used to prevent vibration from being transmitted to the upper support seat 175 and the first grinding base 14 below, reducing the impact on the crushing assembly 17 and the first grinding assembly. The damping pad 1 63 and the damping pad 2 64 are existing technologies and can be made of rubber material. They are not drawn or described in detail here.

[0084] like Figure 6-7 As shown, in this embodiment, a plurality of vibration baffles 611 are fixedly provided on the inner wall of the support frame 61 in a circular shape. The vibration baffles 611 are made of polycarbonate, have high impact resistance, and can be purchased on the market.

[0085] like Figure 6-7As shown, in this embodiment, a plurality of baffles 651 are fixedly provided on the circumference of the rotating disk 65. A vibration component for striking the vibration diaphragm 611 is provided between two adjacent baffles 651. The vibration component includes a vibration block 652 and an elastic component. The vibration block 652 is hingedly provided on the circumference of the rotating disk 65, and one side of the vibration block 652 contacts the side of the front baffle 651. The elastic component is installed between the other side of the vibration block 652 and the rear baffle 651. The inclined position of the vibration block 652 contacts the vibration diaphragm 611. The elastic component includes a spring 1 653.

[0086] Jack nuts 66 are symmetrically provided on the upper and lower surfaces of the rotating disk 65. A damping ring 654 is fixedly provided on the inner ring of the rotating disk 65. The damping ring 654 sleeve 172 is provided on the surface of the rotating shaft 52. The damping ring 654 can reduce the vibration transmitted to the rotating shaft 52. The damping ring 654 is conventional technology and will not be described in detail here.

[0087] like Figure 9 As shown, in this embodiment, a bidirectional thread groove is provided on the circumferential surface of the rotating shaft 52 located in the supporting frame 1 61 , and two tightening nuts 66 are respectively threadedly disposed in the upper and lower thread grooves with different rotation directions.

[0088] like Figure 6-7 As shown, in this embodiment, the middle surfaces of the annular cover plate 2 62 , the support frame 1 61 and the damping pad 1 63 below are all provided with holes of the same diameter, and the diameter of the hole is larger than the diameter of the rotating shaft 52 to avoid contact with the rotating shaft 52 and reduce the impact of vibration force on the rotating shaft 52.

[0089] Specifically, when installing the rotating disk 65, first rotate the lower tightening nut 66 into the lower threaded groove, then put the rotating disk 65 on the circumferential surface of the rotating shaft 52, tightly against the lower tightening nut 66, and then rotate the upper tightening nut 66 into the upper threaded groove. At this time, continue to screw the upper tightening nut 66 to fix the position of the rotating disk 65. The rotation of the rotating shaft 52 drives the rotation of the rotating disk 65, and then the vibration block 652 hits the vibration partition 611, and the vibration partition 611 vibrates. The vibration is transmitted to the support frame 61, which can vibrate the zinc oxide particles accumulated on the fan ring surface of the support frame 61, so that they can enter the first grinding space more smoothly and will not cause accumulation at the feed inlet of the first grinding space.

[0090] Furthermore, by adjusting the horizontal position of the upper and lower tightening nuts 66, the contact area between the inclined surface of the vibration block 652 and the vibration partition 611 can be adjusted, thereby adjusting the vibration amplitude of the support frame 61 to avoid the impact of vibration on the crushing assembly 17 and the graded grinding mechanism.

[0091] like Figure 2-14 As shown, in this embodiment, the second grinding assembly includes a second grinding disc 13 and a second grinding base 112. The grinding ring of the second grinding disc 13 is an inverted frustum. The second grinding disc 13 is rotatably arranged on the lower end surface of the first grinding base 14. The second grinding base 112 is provided with a second grinding surface 1121 adapted to the second grinding disc 13. A plurality of second grinding blocks are fixedly arranged in a circular pattern on the sector ring surface of the second grinding disc 13. The gap between the second grinding block and the second grinding surface 1121 is a second grinding space. The second grinding base 112 is fixed to the inner wall of the processing cylinder 1.

[0092] Grinding block 2 consists of half a cone and half a cylinder. The cone is located close to the top of the second grinding surface 1121. The bottom diameter of the cone is the same as the end diameter of the cylinder. The gap between the cone and the second grinding base is gradually reduced to facilitate the entry of zinc oxide particles into the second grinding space.

[0093] like Figure 2-14 As shown, in this embodiment, the gap between the upper end inclined surface of the second grinding disc 13 and the second grinding surface 1121 is the second material discharge space 221, and the second material discharge space 221 is communicated with the second grinding space.

[0094] Specifically, after the zinc oxide particles are ground by the first grinding ring 12, the zinc oxide particles will enter the second discharge space 221 due to the weight of the zinc oxide particles themselves and the centrifugal force generated by the rotation of the first grinding ring 12. The zinc oxide particles will gradually enter the second grinding space from the second discharge space 221 due to the weight of the zinc oxide particles themselves, and then enter the third grinding assembly due to the weight of the zinc oxide particles themselves and the centrifugal force generated by the rotation of the second grinding disk 13.

[0095] like Figure 2-14 As shown, in this embodiment, the third grinding assembly includes a disc-shaped third grinding disc 81, a hollow connecting shaft 83, a material guide funnel 82 and a disc-shaped third grinding base 18. The connecting shaft 83 is fixedly arranged on the lower end surface of the second grinding disc 13, and the material guide funnel 82 is fixedly sleeved on the circumferential surface of the connecting shaft 83. The third grinding disc 81 is fixedly arranged on the lower end surface of the connecting shaft 83. The circumferential surface of the connecting shaft 83 located inside the material guide funnel 82 is circumferentially provided with a plurality of material discharge grooves 831 that communicate with the inner cavity of the material guide funnel 82 and the connecting shaft 83. The material guide funnel 82 is rotatably arranged on the lower end surface of the second grinding base 112 and communicates with the second grinding space.

[0096] A plurality of grinding balls are fixedly mounted on the lower end surface of the third grinding disc 81 . The grinding balls are in contact with the upper surface of the third grinding base 18 . The gaps between the grinding balls cooperate with the third grinding base 18 to form a third grinding space.

[0097] Specifically, the first grinding space is larger than the second grinding space, so that the particle size of the produced zinc oxide particles can be gradually reduced, and the particle uniformity of the ground zinc oxide powder can be significantly improved.

[0098] like Figure 2-14 As shown, in this embodiment, the rotating shaft 52 passes through the first grinding base 14 and rotates with it. The lower end surface of the rotating shaft 52 is fixed to the second grinding base 112, and the second grinding base 112 is driven to rotate by the rotating shaft 52.

[0099] like Figure 2-14 As shown, in this embodiment, the diameters of the first grinding base 14 and the second grinding base 112 are both smaller than the inner diameter of the processing cylinder 1, which facilitates the falling of zinc oxide particles. The lower end surface of the first grinding base 14 is fixedly provided with a bottom plate 142 having a plurality of air inlet grooves. The first grinding base 14 and the third grinding base 18 are both hollow. A plurality of support tubes 141 are fixedly provided in a circular shape on the circumferential surface of the first grinding base 14, and a plurality of support tubes 2 181 are fixedly provided in a circular shape on the circumferential surface of the third grinding base 18. Both support tube 141 and support tube 2 181 pass through the processing cylinder 1 and are fixedly matched. The first grinding base 14 is supported by support tube 141, and the third grinding base 18 is supported by support tube 2 181.

[0100] like Figure 6 As shown, in this embodiment, the support frame 1 61 and the damping pad 2 64 thereunder are both provided with a plurality of air inlet holes communicating with the inner cavity of the first grinding base 14 .

[0101] Specifically, while the zinc oxide raw material is being processed, cooling gas is introduced into the first grinding base 14 and the third grinding base 18 through the support tube 1 141 and the support tube 2 181, and among the plurality of support tubes 1 141 and the plurality of support tubes 2 181, one support tube 1 141 and one support tube 2 181 are reserved for discharging the cooling gas.

[0102] Furthermore, the cooling gas is used to absorb the heat generated by vibration and grinding in the processing cylinder 1, so as to prevent the temperature in the processing cylinder 1 from being too high, causing the zinc oxide particles to agglomerate, resulting in the zinc oxide particles being unable to fall and affecting the grinding process.

[0103] The zinc oxide particles ground by the second grinding disc 13 enter the material guide funnel 82. At this time, the material guide funnel 82 is in a rotating state. The zinc oxide particles entering the material guide funnel 82 will enter the cavity of the connecting shaft 83 along the discharge trough 831, and then fall onto the third grinding base 18 from the outlet at the lower end of the connecting shaft 83. At this time, the third grinding disc 81 is in a rotating state, so the zinc oxide particles falling on the third grinding base 18 will enter the third grinding space in a rotating state, and be ground by the grinding balls. In conjunction with the rotation of the third grinding disc 81 during the grinding time, the zinc oxide particles on the surface of the third grinding base 18 can be driven to move around. As the rotation grinding proceeds, they will gradually separate from the third grinding base 18 and enter the filter cylinder 2 below.

[0104] Furthermore, the crushed zinc oxide particles are subjected to three grinding processes with different precisions, so that the particle size of the zinc oxide particles can be gradually reduced until the desired particle size is reached.

[0105] like Figure 3 As shown, in this embodiment, the inner upper surface of the support sleeve 113 is provided with a ring-shaped air suction hole 114 communicating with the outside world, and the outer end of the air suction hole 114 is connected to an exhaust device. The exhaust device is a prior art and is not drawn or described in detail at this time.

[0106] Specifically, after a batch of processing, the machine needs to be stopped and the inside of the processing cylinder 1 needs to be cleaned. At this time, the inside of the processing cylinder 1 is extracted through an external vacuum mechanism, and the zinc oxide particles attached to the first grinding base 14, the second grinding base 112 and the third grinding base 18 can be extracted to avoid blockage during the next processing, which will cause the zinc oxide particles to be unable to fall into the filter cylinder 2 below.

[0107] like Figure 15-20 As shown, in this embodiment, the filter mechanism 7 includes a second annular support plate 71, a second annular support frame 72 and a second support cylinder 23. A plurality of sliding plates 74 are provided on the upper surface of the second annular support plate 71 in a circumferentially sliding manner, and L-shaped guide rails 711 fixed to the second annular support plate 71 are symmetrically provided on both sides of the sliding plate 74. A fan-shaped filter plate 742 is fixedly provided on the sliding plate 74 near the center of the second annular support plate 71. When the plurality of filter plates 742 are combined, a circular plate-shaped structure can be formed to seal the filter cylinder 2.

[0108] The annular support frame 2 72 is fixedly arranged on the upper end surface of the annular support plate 2 71. After installation, a gap is left between the upper inner wall surface of the annular support frame 2 72 and the filter plate 742, which is convenient for cleaning and collecting the filter material with larger particle size remaining on the surface of the filter plate 742. At this time, the filter material is zinc oxide particles with larger particle size that do not meet the subsequent processing standards.

[0109] like Figure 15-20 As shown, in this embodiment, a slider 741 is fixedly provided on the upper end surface of the sliding plate 74, and a rectangular slide groove 721 is provided at a position corresponding to the slider 741 on the upper end surface of the annular support frame 72. The slider 741 is slidably set in the slide groove 721, and a connecting hole 722 is provided at a position on the upper end surface of the annular support frame 72 away from the slide groove 721. The connecting hole 722 is connected to an extraction device. The extraction device is a prior art and is not drawn or described in detail here. The extraction device is used to extract the filter material remaining on the surface of the filter plate 742.

[0110] like Figure 15-20 As shown, in this embodiment, the upper annular support frame 2 72 is fixedly sleeved on the circumferential surface of the support tube 1 211, and the annular support plate 2 71 combined therewith is fixedly sleeved on the circumferential surface of the upper support tube 2 23; the lower annular support frame 2 72 is fixedly sleeved on the circumferential surface of the upper support tube 2 23, and the annular support plate 2 71 combined therewith is fixedly sleeved on the circumferential surface of the lower support tube 2 23.

[0111] like Figure 15-20 As shown, in this embodiment, a plurality of circumferentially arranged pushing components are provided on the circumferential surfaces of the support cylinder 1 211 and the support cylinder 2 23 , and the pushing components are used to push the sliding plate 74 to complete the merging of the filter plates 742 .

[0112] like Figure 15-20 As shown, in this embodiment, the pushing assembly includes a telescopic cylinder 73, and the fixed end of the telescopic cylinder 73 is provided with a hinge seat 731. The hinge seat 731 in the upper pushing assembly is fixed on the circumferential surface of the support cylinder 211, and the outer end of the piston rod of the telescopic cylinder 73 is provided with a hinge seat 732. The hinge seat 732 is fixedly provided on the upper end surface of the slider 741. The telescopic cylinder 73 is driven to drive the sliding plate 74 to slide in the annular support frame 72, so that the filter plate 742 is merged.

[0113] like Figure 15-20 As shown, in this embodiment, a gap is left between the lower end surface of the support cylinder 1 211 and the upper end surface of the upper support cylinder 23, and a gap is also left between the lower end surface of the upper support cylinder 23 and the upper end surface of the lower support cylinder 23. The gap left allows the filter plates 742 to be merged.

[0114] An annular groove 231 is provided on the upper end surface of the supporting tube 23, and a closed ring 233 is slidably provided in the annular groove 231. A spring 232 is fixedly connected between the closed ring 233 and the inner bottom surface of the annular groove 231. The spring 232 is used to help the closed ring 233 to seal the gap to prevent falling zinc oxide particles from entering the annular supporting frame 72.

[0115] like Figure 15-20 As shown, in this embodiment, the upper end face of the closed ring 233 is provided with an inclined surface, and the filter plate 742 is also provided with an inclined surface on one side relative to the closed ring 233. During the merging process, the filter plate 742 will push the inclined surface of the closed ring 233, causing the closed ring 233 to descend in the annular groove 231, causing the spring 232 to be compressed. When the filter plates 742 are merged, the closed ring 233 is at the lower end face of the sliding plate 74 and is blocked by the sliding plate 74.

[0116] Specifically, in the working state, several filter plates 742 in one filter mechanism 7 are in a merged state, and several filter plates 742 in another filter mechanism 7 are in a separated state. After a certain amount of filtered material accumulates on the surface of the filter plates 742 in the merged state, the other group of filter plates 742 in the separated state begins to merge. After the merging is completed, the group of filter plates 742 with more filtered material begins to shrink to the annular support frame 2 72. There is a gap between the upper surface of the filter plate 742 and the lower end surface of the support tube 23 to prevent the filtered material on the surface of the filter plate 742 from being scratched by the support tube 23. After the retraction is completed, the spring 232 in the compressed state drives the closed ring 233 to reset. At this time, the accumulated filtered material can be extracted and collected by the extraction device. The particle size of the filtered zinc oxide particles reaches a reasonable size for subsequent processing. The zinc oxide particles at this time can also be called zinc oxide powder.

[0117] Furthermore, by alternately using the two sets of filtering mechanisms 7, the zinc oxide particles can be continuously filtered without stopping the machine to clean the filtered material, thereby greatly improving the processing efficiency of the zinc oxide.

[0118] like Figure 15 As shown, in this embodiment, the filtered zinc oxide powder will enter the discharge mechanism 9, and the zinc oxide powder will be introduced into the external collection device through the discharge mechanism 9;

[0119] The unloading mechanism 9 includes a material guide cylinder 91 and a discharge funnel 92. The material guide cylinder 91 is fixedly arranged on the lower end surface of the supporting cylinder 23 below and is communicated with the supporting cylinder 23. The discharge funnel 92 is fixedly arranged on the lower end surface of the material guide cylinder 91 and is communicated with the material guide cylinder 91. A vibration motor 93 is symmetrically fixed on the circumferential surface of the material guide cylinder 91. The vibration motor 93 can be purchased on the market. The filter plate 742 is vibrated and screened by the vibration motor 93, and at the same time, the zinc oxide powder in the discharge funnel 92 can be better entered into the collection device.

[0120] Example 2:

[0121] A method for processing a zinc oxide resistor for a lightning arrester comprises the following steps:

[0122] S1. Use wet grinding process to refine the zinc oxide raw materials into particles:

[0123] S1.1. The zinc-containing raw material is placed in the processing device of Example 1 for crushing and coarse grinding, and the coarse grinding is performed to a set particle size (usually <200 mesh) to ensure sufficient subsequent leaching reaction;

[0124] S1.2. Mix the zinc oxide powder treated by the processing device with a solvent (water or ammonia) and a dispersant (such as castor oil or sodium polyacrylate) to form a uniform suspension. The amount of dispersant used is usually 1–5% of the raw material mass.

[0125] S1.3. Ultrasonic nano-grinding equipment is used to refine particles to the nanoscale (<100 nm) through a combination of mechanical shearing and high-frequency vibration. The grinding time is adjusted according to the target particle size (usually 4–8 hours), and the temperature is controlled at 25–60°C to prevent solvent evaporation. The above ultrasonic nano-grinding equipment is all existing technology.

[0126] S1.4. Remove impurities from the grinding slurry by chemical precipitation (such as sodium sulfide to remove copper and lead), replacement reaction (zinc powder to replace heavy metals) or centrifugal filtration;

[0127] S1.5. The slurry after impurity removal is dehydrated by filter press or centrifuge to obtain wet zinc oxide filter cake, which is then spray dried or vacuum dried at low temperature (100–120°C) to prepare dry powder to avoid particle agglomeration.

[0128] S1.6. The dried powder is calcined at 400–500°C to optimize the crystal form and remove residual organic matter, ultimately obtaining high-purity nano-zinc oxide powder;

[0129] S2. Mixing the wet-ground zinc oxide powder with auxiliary materials to optimize the resistance performance of the zinc oxide resistor; the auxiliary materials include metal salt solutions such as cobalt and bismuth; mixing the auxiliary materials with the zinc oxide powder to form a composite powder wrapped with zinc oxide through a precipitation reaction to enhance the nonlinear conductive properties of the resistor; adding a dispersant (such as polyvinyl alcohol) to prevent agglomeration and ensure uniform grain boundary distribution after sintering;

[0130] S3, forming the mixed powder:

[0131] S3.1 Granulation treatment: Use a spray granulator to make the mixed zinc oxide powder into tiny particles to improve the material fluidity. At the same time, the granulation moisture is controlled at 5-8% to avoid cracking during subsequent tableting.

[0132] S3.2, pressing and molding: Use isostatic pressing technology to press the granulated powder into a disc body. The pressure range is 80-150 MPa. The body density must reach 60-70% of the theoretical density to ensure the sintering shrinkage rate is controllable.

[0133] S4. Sintering the formed embryo:

[0134] S4.1. Pre-sintering: heating at 700-900℃ for 1-3 hours to remove granulating agents and organic impurities;

[0135] S4.2. High-temperature sintering: Use a gradient temperature increase (10°C / min) to 1100-1300°C and hold for 2-5 hours to form a dense structure with coexisting ZnO grains and grain boundary oxides. 47 The grain size is controlled to be 10-30μm, and the grain boundary thickness is 0.1-1μm to ensure the nonlinear response accuracy of the resistor.

[0136] S5. Surface treatment and electrode processing of the sintered zinc oxide resistor sheet:

[0137] S5.1. Grinding and cleaning: Use a four-pass flat grinder to polish both sides of the sintered sheet with a thickness tolerance of ±0.05mm. Ultrasonic cleaning is used to remove residual particles on the surface to avoid electrode coating defects.

[0138] S5.2. Electrode preparation: Spray silver or aluminum paste as the electrode material and sinter at 800-900°C to form an ohmic contact. The electrode thickness should be 10-30 μm, and the edge margin should be ≥ 1 mm to prevent electric field concentration breakdown.

[0139] S6. Verify the performance of zinc oxide resistors:

[0140] S6.1. Volt-ampere characteristic test: detect leakage current (required to be less than 50μA) under power frequency voltage (e.g. 10kV) and screen qualified products;

[0141] S6.2. Current-through test, simulating lightning current impulse (e.g. 8 / 20μs waveform, 40kA peak value) to verify energy tolerance capability.

[0142] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

Claims

1. A zinc oxide resistor processing device for lightning arrester, characterized by: The machine comprises a processing cylinder and a filter cylinder. The processing cylinder is arranged above the filter cylinder. A crushing assembly for crushing the zinc oxide raw material is arranged in the processing cylinder. A graded grinding mechanism is arranged below the crushing assembly. The graded grinding mechanism includes a first grinding assembly, a second grinding assembly and a third grinding assembly arranged in sequence from top to bottom. A vibration mechanism is arranged between the crushing assembly and the first grinding assembly to prevent the accumulation of zinc oxide particles. A filtering mechanism is symmetrically arranged in the filter cylinder, and a feeding mechanism is arranged below the filtering mechanism. The filter mechanism includes an annular support plate 2, an annular support frame 2 and a support cylinder 2. The upper surface of the annular support plate 2 is provided with a plurality of sliding plates for circumferential sliding, and L-shaped guide rails fixed to the annular support plate 2 are symmetrically provided on both sides of the sliding plate. A fan-shaped filter plate is fixedly provided at a position close to the center of the annular support plate 2. After the plurality of filter plates are combined, a circular plate-shaped structure can be formed. The annular support frame 2 is fixedly provided on the upper end surface of the annular support plate 2. After installation, a gap is left between the upper inner wall surface of the annular support frame 2 and the filter plate. A slider is installed on the upper end surface of the sliding plate. The upper end surface of the annular support frame 2 A rectangular slide groove is provided at a position corresponding to the end surface of the slider, and the slider is slidably arranged in the slide groove. A connecting hole is provided at a position of the upper end surface of the annular support frame 2 away from the slide groove. A plurality of pushing components for merging the filter plates are provided on the circumferential surfaces of the support cylinder 1 and the support cylinder 2. A gap is left between the lower end surface of the support cylinder 1 and the upper end surface of the upper support cylinder 2, and a gap is also left between the lower end surface of the upper support cylinder 2 and the upper end surface of the lower support cylinder 2. An annular groove is provided on the upper end surface of the support cylinder 2, and a closed ring is slidably provided in the annular groove. A spring 2 is fixedly connected between the closed ring and the inner bottom surface of the annular groove; The upper annular support frame is fixedly sleeved on the circumferential surface of the support cylinder, and the annular support plate is fixedly sleeved on the circumferential surface of the upper support cylinder. The lower annular support frame is fixedly sleeved on the circumferential surface of the upper support cylinder, and the annular support plate is fixedly sleeved on the circumferential surface of the lower support cylinder; The upper end surface of the closed ring is provided with an inclined surface, and the side of the filter plate opposite to the closed ring is also provided with an inclined surface. During the merging process, the filter plate will push the inclined surface of the closed ring. When the filter plates are merged, the closed ring is at the lower end surface of the sliding plate and is blocked by the sliding plate. In the working state, several filter plates in one filter mechanism are in a combined state, and several filter plates in another filter mechanism are in a separated state.

2. The zinc oxide resistor processing device for lightning arrester according to claim 1, characterized in that: The first grinding assembly includes a connecting seat, a first grinding ring and a first grinding base arranged in sequence from top to bottom. The inclination of the lower end surface of the first grinding ring corresponds to the inclination of the sector ring surface of the first grinding base. The lower end surface of the first grinding ring is fixedly provided with a plurality of grinding blocks 1 in a circular shape. The gap between the grinding block 1 and the sector ring surface of the first grinding base is the first grinding space.

3. The zinc oxide resistor processing device for lightning arrester according to claim 1, characterized in that: The second grinding assembly includes a second grinding disc and a second grinding base installed on the inner wall of the processing cylinder. The second grinding base is provided with a second grinding surface adapted to the second grinding disc. A plurality of grinding blocks 2 are fixedly arranged in a circle on the sector ring surface of the second grinding disc. The gap between the grinding block 2 and the second grinding surface is a second grinding space, and the second grinding space is communicated with the first grinding space.

4. The zinc oxide resistor processing device for lightning arrester according to claim 1, characterized in that: The third grinding assembly includes a hollow connecting shaft, a material guide funnel, a third grinding disc and a third grinding base, which are arranged in sequence from top to bottom. The material guide funnel is fixedly sleeved on the circumferential surface of the connecting shaft. The connecting shaft is located on the circumferential surface of the material guide funnel and is circumferentially provided with several material discharge troughs that are communicated with the material guide funnel and the inner cavity of the connecting shaft. The material guide funnel is rotatably arranged on the lower end surface of the second grinding base and is communicated with the second grinding space. Several grinding balls are fixedly arranged on the lower end surface of the third grinding disc. The grinding balls are in contact with the upper surface of the third grinding base. The gaps between the several grinding balls cooperate with the third grinding base to form a third grinding space.

5. The zinc oxide resistor processing device for lightning arrester according to claim 1, characterized in that: A cover plate 1 is installed on the upper end of the processing cylinder, and a feed funnel is fixedly set in the middle of the upper end surface of the cover plate 1. The feed funnel is communicated with the inside of the processing cylinder. A drive assembly for driving the crushing assembly, the vibration mechanism and the grading grinding mechanism is fixedly set at a position on the upper end surface of the cover plate 1 away from the feed funnel. The drive assembly includes a drive motor and a rotating shaft.

6. The zinc oxide resistor processing device for lightning arrester according to claim 5, characterized in that: The crushing assembly includes gear 2, a ring sleeve and a frustum-shaped support seat. The ring sleeve is arranged on the inner ring of gear 2 and is on the same horizontal plane as gear 2. Several crushing cutters 1 are circumferentially fixedly connected between the outer circumferential surface of the ring sleeve and the inner circumferential surface of gear 2. The ring sleeve is fixedly mounted on the circumferential surface of the rotating shaft; several inclined crushing cutters 2 are circumferentially fixedly mounted between the fan ring surface of the support seat and the lower end surface of gear 2. The support seat is fixedly mounted on the circumferential surface of the rotating shaft.

7. The zinc oxide resistor processing device for lightning arrester according to claim 5, characterized in that: The vibration mechanism includes a support frame 1 and a rotating disk arranged inside the support frame 1. A cover plate 2 is installed on the upper end surface of the support frame 1. The upper end surface of the cover plate 2 and the lower end surface of the support frame 1 are respectively provided with a damping pad 1 and a damping pad 2. The damping pad 1 is fixed to the lower end surface of the support seat 1 and rotates with the rotating shaft. The damping pad 2 is fixed to the lower end surface of the support frame 1 and is fixed to the first grinding base. A plurality of vibration partitions are fixedly provided in a circular shape on the inner wall of the support frame 1, and a plurality of baffles are fixedly provided in a circular shape on the circumferential surface of the rotating disk. A vibration component for knocking the vibration partition is provided between two adjacent baffles.

8. The zinc oxide resistor processing device for lightning arrester according to claim 1, characterized in that: An annular support plate 1 is fixedly provided on the lower end surface of the processing cylinder, an annular top plate is fixedly installed on the upper end surface of the filter cylinder, and a support cylinder 2 is fixedly provided on the middle surface of the top plate. The position of the support cylinder 2 corresponds to the position of the processing cylinder, and a flexible connecting ring is fixedly connected between the support cylinder 2 and the processing cylinder.

9. A processing method based on the processing device according to any one of claims 1 to 8, characterized in that: The steps include: S1. Use wet grinding process to refine the zinc oxide raw materials into particles: First, the zinc oxide raw material is pretreated and crushed and ground using a processing device. The pretreated zinc oxide raw material is then slurried and dispersed. The dispersed material is then wet-ground and refined. The refined material is then cleaned of impurities and purified. The purified material undergoes solid-liquid separation and drying. Finally, the material is post-processed and calcined to obtain high-purity nano zinc oxide powder. S2, mixing zinc oxide powder with auxiliary materials; S3, granulating and pressing the mixed powder; S4, pre-sintering and high-temperature sintering the formed embryonic body; S5, grinding and cleaning the surface of the sintered sheet-shaped zinc oxide resistor and then performing electrode processing; S6. Conduct volt-ampere characteristic test and current flow test on zinc oxide resistor.

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