Device and method for processing zinc oxide resistor disc for lightning arrester

Abstract

The zinc oxide resistor disc machining device comprises a machining cylinder and a filter cylinder, the machining cylinder is arranged above the filter cylinder, a crushing assembly used for crushing blocky zinc oxide raw materials is arranged in the machining cylinder, and a grading grinding mechanism is arranged below the crushing assembly; and the grading grinding mechanism comprises a first grinding assembly, a second grinding assembly and a third grinding assembly which are sequentially arranged from top to bottom, a vibration mechanism used for preventing zinc oxide particles from being stacked is arranged between the crushing assembly and the first grinding assembly, filtering mechanisms are symmetrically arranged in the filtering barrel up and down, and a discharging mechanism is arranged below the filtering mechanisms. According to the invention, the particle uniformity of the zinc oxide powder can be obviously improved through the graded grinding mechanism, and the particle size of the zinc oxide powder is ensured to reach the standard of subsequent processing treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of zinc oxide varistor processing, and particularly relates to a processing device and method for zinc oxide varistors used in lightning arresters. Background Art

[0002] Due to its excellent non-linear characteristics, fast response, and maintenance-free design, zinc oxide varistors have become the core components of lightning arresters and are one of the key technologies for overvoltage protection in power systems. Therefore, improving the structural and compositional uniformity of zinc oxide varistors is a key factor in enhancing the current-carrying capacity. Additionally, the particle size of the zinc oxide powder used to make zinc oxide varistors has a significant impact on the performance of the varistors after firing. The finer the powder, the easier it is to mix evenly, and the better the consistency of the microstructure and grain boundary layer electrical properties of the varistors after firing, and the greater the 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 preferably used when making zinc oxide powder. Using this technology can reduce the ultimate particle size of zinc oxide powder below 100 nm, and the produced zinc oxide varistors will have better performance in actual use.

[0004] Currently, the process for producing zinc oxide powder by wet grinding is as follows: 1. Raw material pretreatment: The zinc-containing raw material needs to be first crushed and dry-ground roughly to a certain particle size (usually <200 mesh) to ensure sufficient subsequent leaching reaction. 2. Slurry preparation and dispersion: The pretreated raw material is mixed with a solvent and a dispersant to form a uniform suspension. The dosage of the dispersant is usually 1 - 5% of the raw material mass. 3. Wet grinding and refinement: A sand mill or ultrasonic nano-grinding equipment is used to combine mechanical shearing and high-frequency vibration to refine the particles to the nano-scale (<100 nm). 4. Impurity removal and purification: The ground slurry is purified by chemical precipitation, displacement reaction, or centrifugal filtration to remove impurities and ensure the purity of the solution. 5. Solid-liquid separation and drying: The purified slurry is dehydrated by a filter press or a centrifuge to obtain a wet zinc oxide filter cake; then dry powder is prepared by spray drying or low-temperature vacuum drying to avoid particle agglomeration. 6. Post-treatment calcination: The dried powder is calcined at 400 - 500 °C to optimize the crystal form and remove residual organic matter, and finally high-purity nano-zinc oxide powder is obtained.

[0005] In the above wet grinding processing technology, in the first step, the zinc-containing raw material needs to be crushed first and then dry-ground roughly to a certain particle size, and this step requires a grinding device to process the zinc-containing raw material.

[0006] After retrieval, the invention patent document with the publication number CN118681661A discloses a zinc oxide raw material grinding device, including a first support and a crushing mechanism. The upper end of the first support is provided with a crushing mechanism, and a pulverizing mechanism is arranged below the crushing mechanism. A feeding structure is connected below the pulverizing mechanism. A second support is arranged on one side of the first support. The crushing mechanism includes a first outer shell, a crushing chamber, a limiting rod, a telescopic rod, crushing blades and a first motor. The pulverizing mechanism includes a second outer shell, a large gear, a small gear, a second motor, a pulverizing chamber and grinding rollers. The feeding structure includes a feeding hopper and a stirring rod.

[0007] During the process of crushing the zinc oxide raw material by the above-mentioned grinding device, the crushing blades are used to crush the zinc oxide raw material. According to the specification drawings given in the above patent document, a part of the crushed zinc oxide raw material will accumulate in the crushing chamber and cannot fall. If the accumulation is excessive, it will cause blockage in the crushing chamber, affecting the subsequent grinding process; moreover, the above-mentioned grinding device uses two symmetrically arranged grinding rollers to grind the zinc oxide particles, and the particle uniformity and particle size of the obtained zinc oxide powder cannot be guaranteed, which will affect the finished product use effect of the zinc oxide resistor chip. Summary of the Invention

[0008] The purpose of the present invention is to provide a processing device and method for zinc oxide resistor chips for lightning arresters. Through the grading grinding mechanism, the particle uniformity of the zinc oxide powder can be significantly improved, and the particle size of the zinc oxide powder can be guaranteed to meet the standards of subsequent processing.

[0009] The present invention adopts the following technical solutions: A processing device for zinc oxide resistor chips for lightning arresters includes a processing cylinder and a filtering cylinder. The processing cylinder is arranged above the filtering cylinder. A crushing assembly for crushing zinc oxide raw materials is arranged in the processing cylinder. A grading grinding mechanism is arranged below the crushing assembly. The grading 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 for preventing the accumulation of zinc oxide particles is arranged between the crushing assembly and the first grinding assembly. Filtering mechanisms are symmetrically arranged up and down in the filtering cylinder. A feeding mechanism is arranged below the filtering mechanism.

[0010] 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 fan-shaped ring surface of the first grinding base. A plurality of grinding blocks one are fixedly arranged in a circle on the lower end surface of the first grinding ring. The gap between the grinding blocks one and the fan-shaped ring surface of the first grinding base is the first grinding space.

[0011] Optionally, the second grinding assembly includes a second grinding disc and a second grinding base fixed to 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 second grinding blocks are fixedly arranged in a circle on the fan-shaped ring surface of the second grinding disc. The gap between the second grinding blocks and the second grinding surface is the second grinding space, and the second grinding space communicates with the first grinding space.

[0012] Optionally, the third grinding assembly includes a hollow connecting shaft, a feeding funnel, a third grinding disc, and a third grinding base arranged in sequence from top to bottom. The feeding funnel is fixedly sleeved on the circumferential surface of the connecting shaft. A plurality of feeding grooves communicating with the inner cavities of the feeding funnel and the connecting shaft are formed in a circle on the circumferential surface of the connecting shaft located inside the feeding funnel. The feeding funnel is rotatably arranged on the lower end surface of the second grinding base and communicates with 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 gap between the plurality of grinding balls and the third grinding base forms the third grinding space.

[0013] Optionally, a first cover plate is installed at the upper end of the processing cylinder. A feeding funnel is fixedly arranged in the middle of the upper end surface of the first cover plate. The feeding funnel communicates with the inside of the processing cylinder. A driving assembly for driving the crushing assembly, the vibration mechanism, and the classification and grinding mechanism is fixedly arranged at a position on the upper end surface of the first cover plate far from the feeding funnel. The driving assembly includes a driving motor and a rotating shaft.

[0014] Optionally, the crushing assembly includes a second gear, a ring sleeve, and a frustum-shaped support seat. The ring sleeve is arranged inside the second gear and is on the same horizontal plane as the second gear. A plurality of first crushing cutters are fixedly connected in a circle between the outer circumferential surface of the ring sleeve and the inner circumferential surface of the second gear. The ring sleeve is fixedly sleeved on the circumferential surface of the rotating shaft. A plurality of inclined second crushing cutters are fixedly arranged in a circle between the fan-shaped ring surface of the support seat and the lower end surface of the second gear. The support seat is fixedly sleeved on the circumferential surface of the rotating shaft.

[0015] Optionally, the vibration mechanism includes a first support frame and a rotating disc arranged inside the first support frame. A second cover plate is installed on the upper end surface of the first support frame. A first damping pad and a second damping pad are respectively arranged on the upper end surface and the lower end surface of the second cover plate. The first damping pad is fixed to the lower end surface of the first support seat and rotates in cooperation with the rotating shaft. The second damping pad is fixed to the lower end surface of the first support frame and is fixed to the first grinding base. A plurality of vibration partitions are fixedly arranged in a circle on the inner wall of the first support frame. A plurality of baffles are fixedly arranged in a circle on the circumferential surface of the rotating disc. A vibration assembly for knocking the vibration partitions is arranged between two adjacent baffles.

[0016] Optionally, an annular support plate I is fixedly arranged on the lower end surface of the processing cylinder, a ring-shaped top plate is fixedly installed on the upper end surface of the filter cylinder, a support cylinder II is fixedly arranged on the middle surface of the top plate, the position of the support cylinder II corresponds to the position of the processing cylinder, and a flexible connection ring is fixedly connected between the support cylinder II and the processing cylinder.

[0017] Optionally, the filtering mechanism includes an annular support plate II, an annular support frame II and a support cylinder II. A plurality of sliding plates are arranged on the upper surface of the annular support plate II in a circumferential sliding manner, and L-shaped guide rails fixed to the annular support plate II are symmetrically arranged on both sides of the sliding plates. A sector-shaped filter plate is fixedly arranged at the position of the sliding plate close to the center of the annular support plate II. After combining a plurality of filter plates, a circular plate-like structure can be formed. The annular support frame II is fixedly arranged on the upper end surface of the annular support plate II. A gap is left between the inner wall surface above the installed annular support frame II and the filter plate. A slider is installed on the upper end surface of the sliding plate, and a rectangular chute is opened at the position corresponding to the slider on the upper end surface of the annular support frame II. The slider is slidably arranged in the chute. A connection hole is opened at the position of the upper end surface of the annular support frame II far from the chute. A plurality of pushing components for combining the filter plates are arranged on the circumferential surfaces of the support cylinder I and the support cylinder II.

[0018] Optionally, a gap is left between the lower end surface of the support cylinder I and the upper end surface of the upper support cylinder II, and a gap is also left between the lower end surface of the upper support cylinder II and the upper end surface of the lower support cylinder II. An annular groove is opened on the upper end surface of the support cylinder II, a sealing ring is slidably arranged in the annular groove, and a spring II is fixedly connected between the sealing ring and the inner bottom surface of the annular groove.

[0019] A processing method for zinc oxide resistor chips used in lightning arresters includes the following steps: S1. Carry out particle refinement treatment on zinc oxide raw materials by using a wet grinding process: First, perform pretreatment on the zinc oxide raw materials, that is, use a processing device to crush and grind the zinc oxide raw materials; then prepare and disperse the pretreated zinc oxide raw materials into a slurry; secondly, carry out wet grinding and refinement on the dispersed material; thirdly, remove impurities from the refined material and carry out purification treatment after impurity removal; then carry out solid-liquid separation and drying on the purified material; finally, carry out post-treatment calcination on the material to obtain high-purity nano-zinc oxide powder; S2. Mix the zinc oxide powder with auxiliary materials; S3. Carry out granulation and pressing forming treatment on the mixed powder; S4. Carry out pre-sintering and high-temperature sintering treatment on the formed blank; S5. Carry out surface grinding and cleaning on the sintered sheet-shaped zinc oxide resistor chip and then carry out electrode processing; S6. Carry out volt-ampere characteristic testing and current-carrying test on the zinc oxide resistor chip.

[0020] In summary, the present invention has the following beneficial effects: 1. In the present invention, through the grinding spaces of different sizes in the hierarchical grinding mechanism, the particle size of the zinc oxide powder can be gradually ground and reduced, effectively improving the particle uniformity of the zinc oxide powder and ensuring that the particle size of the zinc oxide particles meets the standards for subsequent processing; 2. In the present invention, the crushing mechanism, the vibration mechanism and the hierarchical grinding mechanism all adopt the same driving device, greatly reducing the use of driving components and avoiding the control circuit from being too complex, resulting in a high manufacturing cost; 3. In the present invention, by driving the rotation of the rotating disk by the rotating shaft, the vibration block is used to strike the vibration partition plate, the vibration partition plate generates vibration, and the vibration is transmitted to the first support frame, so that the zinc oxide particles accumulated on the annular surface of the first support frame can be vibrated, making it more smooth to enter the first grinding space and not causing accumulation at the feeding port of the first grinding space; 4. In the present invention, through the alternating use of two groups of filtering mechanisms, continuous filtering treatment can be carried out on the zinc oxide particles without stopping in the middle to clean the filter, greatly improving the processing efficiency of zinc oxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of a partial structure of the present invention; Figure 3 In the present invention Figure 2 is a cross-sectional view; Figure 4 is a schematic diagram of the structure of the third grinding mechanism of the present invention; Figure 5 is a schematic diagram of the structure of the crushing component of the present invention; Figure 6 is a schematic diagram of the structure of the vibration mechanism of the present invention; Figure 7 is a schematic diagram of the structure of the rotating disk of the present invention; Figure 8 is a cross-sectional view of the overall structure of the present invention; Figure 9 In the present invention Figure 8 is an enlarged detail view of part A; Figure 10 is a schematic diagram of the structure of the hierarchical grinding mechanism of the present invention; Figure 11 is a cross-sectional view of the hierarchical grinding mechanism of the present invention; Figure 12 In the present invention Figure 11 is an enlarged detail view of part B; Figure 13 In the present inventionFigure 11 Enlarged view of the details at location C; Figure 14 In the present invention Figure 11 Enlarged view of the details at location D; Figure 15 Schematic diagram of the internal structure of the filter box of the present invention; Figure 16 Schematic diagram of the structure of the filter mechanism of the present invention; Figure 17 Cross-section of the filter cartridge of the present invention Figure One ; Figure 18 Cross-section of the filter cartridge of the present invention Figure Two ; Figure 19 In the present invention Figure 17 Enlarged view of the details at location E; Figure 20 In the present invention Figure 18 Enlarged view of the details at location F.

[0022] In the figure, 1 is a processing cylinder; 2 is a filtering cylinder; 3 is a first base; 31 is a first support rod; 4 is a second base; 41 is a second support rod; 5 is a driving motor; 51 is a fixing frame; 52 is a rotating shaft; 53 is a feeding funnel; 6 is a vibrating mechanism; 7 is a filtering mechanism; 9 is a blanking mechanism; 11 is a first annular support plate; 111 is a connecting block; 112 is a second grinding base; 1121 is a second grinding surface; 113 is a support sleeve; 114 is a suction hole; 12 is a first grinding ring; 121 is a first grinding block; 122 is a first feeding port; 13 is a second grinding disc; 131 is a grinding block; 14 is a first grinding base; 141 is a first support pipe; 142 is a bottom plate; 15 is a connecting seat; 151 is a support ring; 152 is an internal meshing gear ring; 153 is a first gear; 16 is a first cover plate; 161 is a fixing shaft; 17 is a crushing assembly; 171 is a second gear; 172 is a collar; 173 is a first crushing tool; 174 is a second crushing tool; 175 is a support seat; 18 is a third grinding base; 181 is a second support pipe; 21 is a top plate; 211 is a first support cylinder; 22 is a flexible connecting ring; 221 is a second blanking space; 23 is a second support cylinder; 231 is an annular groove; 232 is a second spring; 233 is a sealing ring; 61 is a first support frame; 611 is a vibrating partition; 62 is a second cover plate; 63 is a first damping pad; 64 is a second damping pad; 65 is a rotating disc; 651 is a baffle; 652 is a vibrating block; 653 is a first spring; 654 is a damping ring; 66 is a tightening nut; 71 is a second annular support plate; 711 is a guide rail; 72 is a second annular support frame; 721 is a sliding groove; 722 is a connecting hole; 73 is a telescopic cylinder; 731 is a first hinge seat; 732 is a second hinge seat; 74 is a sliding plate; 741 is a slider; 742 is a filter plate; 81 is a third grinding disc; 82 is a feeding funnel; 83 is a connecting shaft; 831 is a blanking groove; 91 is a guiding cylinder; 92 is a discharging funnel; 93 is a vibrating motor. Detailed implementation manners

[0023] Next, with reference to several representative implementation manners of the present invention, the principles and spirits of the present invention will be elaborated in detail.

[0024] Please refer to Figures 1 - 20 , and the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments: Embodiment 1: As Figures 1 - 2 shown, a zinc oxide resistor chip processing device for an arrester includes a processing cylinder 1 and a filtering cylinder 2. The processing cylinder 1 is arranged above the filtering cylinder 2. A crushing assembly 17 for crushing massive zinc oxide raw materials is arranged in the processing cylinder 1. The crushing assembly 17 can crush the massive zinc oxide raw materials into large-grained zinc oxide materials; A classification and grinding mechanism is provided below the crushing component 17. After passing through the classification and grinding mechanism, large particles of zinc oxide can be made into powdered zinc oxide materials in the form of small particles. The classification and grinding mechanism includes a first grinding component, a second grinding component, and a third grinding component arranged in sequence from top to bottom; Filtering mechanisms 7 for reprocessing the ground zinc oxide powder are symmetrically arranged up and down inside the filter cylinder 2. The filtering mechanisms 7 can screen out the powder particles with larger particle sizes among the zinc oxide powder particles; A blanking mechanism 9 is provided below the filtering mechanism 7. After the zinc oxide powder is filtered, its particle size meets the standards for subsequent processing, and the zinc oxide powder is introduced into an external collection device through the blanking mechanism 9. The above-mentioned collection device is a prior art and will not be drawn and described in detail here; A vibration mechanism 6 is provided between the crushing component 17 and the first grinding component. The crushed zinc oxide particles are vibrated through the vibration mechanism 6 to prevent the zinc oxide particles from accumulating at the inlet of the first grinding component and causing blockage, thereby affecting the grinding efficiency.

[0025] As Figures 1 - 2 shown, in this embodiment, an annular support plate one 11 is fixedly arranged on the lower end surface of the processing cylinder 1. The upper end surface of the filter cylinder 2 is fixedly installed with an annular top plate 21. The middle surface of the top plate 21 is fixedly provided with a support cylinder two 23. The position of the support cylinder two 23 corresponds to the position of the processing cylinder 1, and a flexible connection ring 22 is fixedly connected between the support cylinder two 23 and the processing cylinder 1. The flexible connection ring 22 can prevent the vibration generated by the lower filter cylinder 2 during operation from affecting the grinding process inside the processing cylinder 1. The above-mentioned flexible connection ring 22 is a prior art and will not be drawn and described in detail here.

[0026] As Figures 1 - 2 shown, in this embodiment, an annular base one 3 and a circular base two 4 are provided below the filter cylinder 2. Both the base one 3 and the base two 4 are fixedly installed on the ground and do not contact each other. A number of support rods one 31 are fixedly installed on the upper end surface of the base one 3 in a circumferential manner. A number of support rods two 41 are fixedly installed on the upper end surface of the base two 4 in a circumferential manner. The support rods one 31 are higher than the support rods two 41. The upper end surface of the support rods two 41 is fixed to the lower end surface of the filter cylinder 2. The filter cylinder 2 is supported by the support rods two 41. A number of connection blocks 111 with the same quantity as the support rods one 31 are fixedly arranged on the outer circumferential surface of the annular support plate one in a circumferential manner. The connection blocks 111 are fixed to the side surface of the support rods one 31 through bolts. The annular support plate one 11 is supported by the support rods one 31.

[0027] As Figure 1As 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.

[0028] 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.

[0029] 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.

[0030] like Figure 2 and Figure 5 As 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. 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 .

[0031] Specifically, pour the zinc oxide raw material into the feeding funnel 53, drive the motor 5 to rotate the rotating shaft 52, drive the first crushing tool 173 and the second crushing tool 174 to move, and perform crushing treatment on the zinc oxide raw material. The first crushing tool 173 performs the first crushing process on the zinc oxide raw material, and the second crushing tool 174 performs the second crushing process on the zinc oxide raw material. By performing two crushing treatments on the zinc oxide raw material, the crushing effect of the zinc oxide raw material can be effectively improved. After reducing the particle size of the zinc oxide raw material, it effectively avoids the blockage of zinc oxide particles at the feeding port of the first grinding assembly, affecting the subsequent grinding process of zinc oxide particles.

[0032] As Figures 2 - 14 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 frustum shape. The inclination of the lower end surface of the first grinding ring 12 corresponds to the inclination of the fan-shaped ring surface of the first grinding base 14. A plurality of first grinding blocks 121 are fixedly arranged in a circumferential manner on the lower end surface of the first grinding ring 12. The gap between the first grinding blocks 121 and the fan-shaped ring surface of the first grinding base 14 is the first grinding space. A first feeding port 122 is provided in the middle of the first grinding ring 12, enabling the crushed zinc oxide raw material to enter the first grinding space through the first feeding port 122. The first grinding block 121 is composed of half a cone and half a cylinder. The cone is close to the first feeding port 122, and the bottom diameter of the cone is the same as the end face diameter of the cylinder. The gap between the cone and the first grinding base gradually decreases, facilitating the entry of zinc oxide particles into the first grinding space.

[0033] As Figures 2 - 14 shown, in this embodiment, a ring-shaped support sleeve 113 is fixedly arranged on the inner wall surface of the processing cylinder 1 near the upper end face. The connecting seat 15 is rotatably arranged in the inner ring of the support sleeve 113. A support ring 151 is fixedly arranged on the circumferential surface of the connecting seat 15 near the upper end. The support ring 151 is rotatably arranged on the upper end face of the support sleeve 113, and the support ring 151 is used to support the connecting seat 15.

[0034] As Figures 2 - 14 shown, in this embodiment, an internal meshing gear ring 152 is fixedly arranged on the upper end face of the connecting seat 15. The internal meshing gear ring 152 and the second gear 171 are on the same horizontal plane. A plurality of first gears 153 are arranged in a circumferential manner between the internal meshing gear ring 152 and the second gear 171. By rotating the second gear 171 to drive the rotation of the first gears 153, the rotation of the internal meshing gear ring 152 is driven. The rotation of the internal meshing gear ring 152 drives the rotation of the lower connecting seat 15, and further drives the rotation of the first grinding ring 12.

[0035] As shown Figure 3 In this embodiment, as shown, a fixed shaft 161 with the same number as the first gear 153 is fixedly arranged in a circular shape on the lower surface of the cover plate, and the first gear 153 is rotatably arranged on the circumferential surface of the fixed shaft 161.

[0036] As shown Figures 6 - 7 In this embodiment, as shown, the vibration mechanism 6 includes a frustum-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 fixedly provided with a second cover plate 62 through bolts. A first damping pad 63 and a second damping pad 64 are respectively arranged on the upper end surface of the second cover plate 62 and the lower end surface of the support frame 61. The first damping pad 63 is fixed to the lower end surface of the support seat 175 and is in rotational cooperation with the rotating shaft 52, and the second damping pad 64 is fixed to the lower end surface of the support frame 61 and is fixed to the first grinding base 14.

[0037] Specifically, the first damping pad 63 and the second damping pad 64 are used to prevent vibration from being transmitted to the upper support seat 175 and the lower first grinding base 14, reducing the impact on the crushing assembly 17 and the first grinding assembly. The first damping pad 63 and the second damping pad 64 are prior arts and can be made of rubber material, and will not be described in detail and drawn here.

[0038] As shown Figures 6 - 7 In this embodiment, as shown, a plurality of vibration partitions 611 are fixedly arranged in a circular shape on the inner wall of the support frame 61. The vibration partitions 611 are made of polycarbonate, have high impact resistance, and can be purchased on the market.

[0039] As shown Figures 6 - 7 In this embodiment, as shown, a plurality of baffles 65 are fixedly arranged in a circular shape on the circumferential surface of the rotating disk 65. A vibration assembly for knocking the vibration partitions 611 is arranged between two adjacent baffles 651. The vibration assembly includes a vibration block 652 and an elastic component. The vibration block 652 is hinged to the circumferential surface of the rotating disk 65, and one side surface of the vibration block 652 is in contact with the side surface of the front baffle 651. The elastic component is installed between the other side surface of the vibration block 652 and the rear baffle 651 at the inclined surface position of the vibration block 652 in contact with the vibration partition 611. The elastic component includes a first spring 653; Tightening nuts 66 are symmetrically arranged on the upper and lower surfaces of the rotating disk 65. A damping ring 654 is fixedly arranged on the inner ring of the rotating disk 65. The damping ring 654 is sleeved 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 a prior art and will not be described in detail here; As shown Figure 9 In this embodiment, as shown, a bidirectional thread groove is provided on the circumferential surface of the rotating shaft 52 located inside the support frame 61, and the two tightening nuts 66 are respectively threadedly arranged in the thread grooves with different helix directions on the upper and lower sides.

[0040] As shown Figures 6 - 7 In this embodiment, as shown, holes with the same diameter are provided on the middle surfaces of the annular cover plate two 62, the support frame one 61, and the lower damping pad one 63. The diameter of the holes is larger than the diameter of the rotating shaft 52 to avoid contact with the rotating shaft 52 and reduce the influence of the vibration force on the rotating shaft 52.

[0041] Specifically, when installing the rotating disk 65, first rotate the lower tightening nut 66 into the lower thread groove, then fit the rotating disk 65 onto the circumferential surface of the rotating shaft 52 and press it against the lower tightening nut 66. Then rotate the upper tightening nut 66 into the upper thread groove. At this time, continue to turn 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 strikes the vibration partition 611, causing the vibration partition 611 to vibrate. The vibration is transmitted to the support frame one 61, which can vibrate the zinc oxide particles accumulated on the fan-shaped ring surface of the support frame one 61, making them enter the first grinding space more smoothly and preventing accumulation at the feed inlet of the first grinding space.

[0042] Furthermore, by adjusting the horizontal positions 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 one 61 and avoiding the influence of vibration on the crushing assembly 17 and the classification and grinding mechanism.

[0043] As shown Figures 2 - 14 In this embodiment, as shown, the second grinding assembly includes a second grinding disk 13 and a second grinding base 112. The grinding ring of the second grinding disk 13 is arranged in an inverted frustum shape. The second grinding disk 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 disk 13. A number of second grinding blocks are fixedly arranged in a circumferential manner on the fan-shaped ring surface of the second grinding disk 13. The gap between the second grinding blocks and the second grinding surface 1121 is the second grinding space. The second grinding base 112 is fixed on the inner wall of the processing cylinder 1. The second grinding block is composed of a half-cone and a half-cylinder. The position of the cone is close to the upper position of the second grinding surface 1121. The bottom diameter of the cone is the same as the end face diameter of the cylinder. The gap between the cone and the second grinding base gradually decreases, facilitating the entry of zinc oxide particles into the second grinding space.

[0044] As shown Figures 2 - 14 In this embodiment, as shown, the gap between the upper inclined surface position of the second grinding disk 13 and the second grinding surface 1121 is the second feeding space 221, and the second feeding space 221 is communicated with the second grinding space.

[0045] Specifically, after the zinc oxide particles are ground by the first grinding ring 12, 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 enter the second blanking space 221. Due to the weight of the zinc oxide particles themselves, the zinc oxide particles will gradually enter the second grinding space from the second blanking space 221, and then due to the weight of the zinc oxide particles themselves and the centrifugal force generated by the rotation of the second grinding disk 13, the zinc oxide particles will enter the third grinding assembly.

[0046] As Figures 2 - 14 shown, in this embodiment, the third grinding assembly includes a disk-shaped third grinding disk 81, a hollow connecting shaft 83, a feeding funnel 82, and a disk-shaped third grinding base 18. The connecting shaft 83 is fixedly arranged on the lower end surface of the second grinding disk 13. The feeding funnel 82 is fixedly sleeved on the circumferential surface of the connecting shaft 83. The third grinding disk 81 is fixedly arranged on the lower end surface of the connecting shaft 83. A plurality of blanking grooves 831 communicating with the inner cavities of the feeding funnel 82 and the connecting shaft 83 are circumferentially formed on the circumferential surface of the connecting shaft 83 located inside the feeding funnel 82. The feeding funnel 82 is rotatably arranged on the lower end surface of the second grinding base 112 and communicates with the second grinding space; A plurality of grinding balls are fixedly arranged on the lower end surface of the third grinding disk 81. The grinding balls are in contact with the upper surface of the third grinding base 18. The gaps between the plurality of grinding balls and the third grinding base 18 form the third grinding space.

[0047] 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.

[0048] As Figures 2 - 14 shown, in this embodiment, the rotating shaft 52 penetrates through the first grinding base 14 and is in rotational fit. 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.

[0049] As Figures 2 - 14 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 is convenient for the zinc oxide particles to fall. 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. Both the first grinding base 14 and the third grinding base 18 are hollow. A plurality of support pipes 141 are circumferentially and fixedly arranged on the circumferential surface of the first grinding base 14, and a plurality of support pipes 181 are circumferentially and fixedly arranged on the circumferential surface of the third grinding base 18. The support pipes 141 and the support pipes 181 both penetrate through the processing cylinder 1 and are fixedly fitted. The first grinding base 14 is supported by the support pipes 141, and the third grinding base 18 is supported by the support pipes 181.

[0050] As Figure 6 shown, in this embodiment, a plurality of air inlet holes communicating with the inner cavity of the first grinding base 14 are provided in both the support frame one 61 and the damping pad two 64 below.

[0051] Specifically, while processing the zinc oxide raw material, cooling gas is introduced into the first grinding base 14 and the third grinding base 18 through the support pipe one 141 and the support pipe two 181, and in a plurality of support pipes one 141 and a plurality of support pipes two 181, one support pipe one 141 and one support pipe two 181 are left for discharging the cooling gas.

[0052] Furthermore, the cooling gas is used to absorb the heat generated by vibration and grinding in the processing cylinder 1, avoiding excessive temperature in the processing cylinder 1, causing agglomeration of zinc oxide particles, resulting in the inability of zinc oxide particles to fall, and affecting the grinding process.

[0053] The zinc oxide particles ground by the second grinding disc 13 enter the feeding funnel 82. At this time, the feeding funnel 82 is in a rotating state. The zinc oxide particles entering the feeding funnel 82 will enter the cavity of the connecting shaft 83 along the feeding groove 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. Therefore, the zinc oxide particles falling onto the third grinding base 18 will enter the third grinding space in a rotating state and be ground by the grinding balls. 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 rotating grinding progresses, they will gradually separate from the third grinding base 18 and enter the lower filter cylinder 2.

[0054] Furthermore, the crushed zinc oxide particles can be gradually reduced in particle size through three grinding processes with different precisions until the required particle size is reached.

[0055] As Figure 3 shown, in this embodiment, an air suction hole 114 communicating with the outside is annularly provided on the inner upper surface of the support sleeve 113. The outer end of the air suction hole 114 is connected to an air extraction device, which is a prior art and is not drawn and described in detail at this time.

[0056] Specifically, after a batch of processing, it is necessary to stop the machine and then clean the inside of the processing cylinder 1. At this time, an external air extraction mechanism is used to extract the inside of the processing cylinder 1, 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, avoiding blockage during the next processing and resulting in the inability of zinc oxide particles to fall into the lower filter cylinder 2.

[0057] As shown Figures 15 - 20 In this embodiment, the filtering mechanism 7 includes an annular support plate II 71, an annular support frame II 72, and a support cylinder II 23. A plurality of sliding plates 74 are slidably arranged on the upper surface of the annular support plate II 71 in a circumferential manner, and L-shaped guide rails 711 fixed to the annular support plate II 71 are symmetrically arranged on both sides of the sliding plates 74. A sector-shaped filter plate 742 is fixedly arranged at a position of the sliding plate 74 close to the center of the annular support plate II 71. After a plurality of filter plates 742 are combined, they can form a circular plate-like structure to close the filter cylinder 2. The annular support frame II 72 is fixedly arranged on the upper end surface of the annular support plate II 71. A gap is left between the upper inner wall surface of the installed annular support frame II 72 and the filter plate 742, which is convenient for cleaning and collecting the filter residues with larger particle sizes on the surface of the filter plate 742. At this time, the filter residues are zinc oxide particles with larger particle sizes that do not meet the subsequent processing standards.

[0058] As shown Figures 15 - 20 In this embodiment, a slider 741 is fixedly arranged on the upper end surface of the sliding plate 74. A rectangular sliding groove 721 is formed at a position corresponding to the slider 741 on the upper end surface of the annular support frame II 72. The slider 741 is slidably arranged in the sliding groove 721. A connection hole 722 is formed at a position of the upper end surface of the annular support frame II 72 far from the sliding groove 721. An extraction device is communicated with the connection hole 722. The extraction device is a prior art and will not be drawn and described in detail here. The extraction device is used to extract the filter residues on the surface of the filter plate 742.

[0059] As shown Figures 15 - 20 In this embodiment, the upper annular support frame II 72 is fixedly sleeved on the circumferential surface of the support cylinder I 211. The combined annular support plate II 71 is fixedly sleeved on the circumferential surface of the upper support cylinder II 23. The lower annular support frame II 72 is fixedly sleeved on the circumferential surface of the upper support cylinder II 23. The combined annular support plate II 71 is fixedly sleeved on the circumferential surface of the lower support cylinder II 23.

[0060] As shown Figures 15 - 20 In this embodiment, a plurality of push components arranged in a circumferential manner are provided on the circumferential surfaces of the support cylinder I 211 and the support cylinder II 23. The push components are used to push the sliding plate 74 so that the filter plates 742 are combined.

[0061] As shown Figures 15 - 20As shown in the figure, in this embodiment, the pushing component includes a telescopic cylinder 73. A hinge seat one 731 is provided at the fixed end of the telescopic cylinder 73. The hinge seat one 731 in the upper pushing component is fixed on the circumferential surface of the support cylinder one 211. A hinge seat two 732 is provided at the outer end of the piston rod of the telescopic cylinder 73. The hinge seat two 732 is fixedly arranged on the upper end surface of the slider 741. Driven by the telescopic cylinder 73, the sliding plate 74 is driven to slide in the annular support frame two 72, so that the filter plate 742 is completed to merge.

[0062] As Figures 15 - 20 shown in the figure, in this embodiment, there is a gap between the lower end surface of the support cylinder one 211 and the upper end surface of the upper support cylinder two 23, and there is also a gap between the lower end surface of the upper support cylinder two 23 and the upper end surface of the lower support cylinder two 23. Through the reserved gap, the filter plate 742 can be completed to merge; An annular groove 231 is provided on the upper end surface of the support cylinder two 23. A sealing ring 233 is slidably arranged in the annular groove 231. A spring two 232 is fixedly connected between the sealing ring 233 and the inner bottom surface of the annular groove 231. The spring two 232 is used to help the sealing ring 233 block the gap to prevent the falling zinc oxide particles from entering the annular support frame two 72.

[0063] As Figures 15 - 20 shown in the figure, in this embodiment, an inclined surface is provided on the upper end surface of the sealing ring 233, and an inclined surface is also provided on the side of the filter plate 742 relative to the sealing ring 233. During the merging process of the filter plate 742, the inclined surface of the sealing ring 233 will be pushed, so that the sealing ring 233 descends in the annular groove 231, causing the spring two 232 to be compressed. When the merging of the filter plate 742 is completed, the sealing ring 233 is located at the lower end surface of the sliding plate 74 and is blocked by the sliding plate 74.

[0064] Specifically, in the working state, several filter plates 742 in one filtering mechanism 7 are in the merged state, and several filter plates 742 in the other filtering mechanism 7 are in the separated state. After a certain amount of filter substances are accumulated on the surface of the filter plates 742 in the merged state, another group of filter plates 742 in the separated state starts to merge. After the merging is completed, the group of filter plates 742 with more accumulated filter substances starts to contract into the annular support frame two 72. There are gaps between the upper surface of the filter plate 742 and the lower end surface of the support cylinder two 23 to prevent the filter substances on the surface of the filter plate 742 from being scraped by the support cylinder two 23. After the retraction is completed, the spring two 232 in the compressed state drives the sealing ring 233 to reset. At this time, the accumulated filter substances can be extracted and collected by the extraction device. The particle size of the filtered zinc oxide particles reaches a reasonable size for subsequent treatment. At this time, the zinc oxide particles can also be called zinc oxide powder.

[0065] Further, by alternately using the two groups of filtering mechanisms 7, continuous filtering treatment can be performed on zinc oxide particles, eliminating the need for intermediate shutdowns to clean the filter residues, thereby greatly improving the processing efficiency of zinc oxide.

[0066] As Figure 15 shown, in this embodiment, the filtered zinc oxide powder will enter the blanking mechanism 9, and the zinc oxide powder is introduced into an external collection device through the blanking mechanism 9; The blanking mechanism 9 includes a material guiding cylinder 91 and a discharging funnel 92. The material guiding cylinder 91 is fixedly arranged on the lower end surface of the lower supporting cylinder two 23 and is communicated with the supporting cylinder two 23. The discharging funnel 92 is fixedly arranged on the lower end surface of the material guiding cylinder 91 and is communicated with the material guiding cylinder 91. Vibration motors 93 are symmetrically and fixedly arranged on the circumferential surface of the material guiding cylinder 91. The vibration motors 93 can be purchased on the market. The filter plate 742 is vibrated and screened through the vibration motors 93, and at the same time, the zinc oxide powder in the discharging funnel 92 can better enter the collection device.

[0067] Embodiment Two: A processing method for zinc oxide resistor chips used in lightning arresters includes the following steps: S1. Granularity refinement treatment of zinc oxide raw materials using a wet grinding process: S1.1. Put the zinc-containing raw materials into the processing device in Embodiment One for crushing and coarse grinding until the set particle size (usually <200 mesh) is reached to ensure sufficient subsequent leaching reaction; S1.2. Mix the zinc oxide powder processed by the processing device with a solvent (water or ammonia water) and a dispersant (such as castor oil, sodium polyacrylate) to form a uniform suspension. The dosage of the dispersant is usually 1–5% of the raw material mass; S1.3. Use an ultrasonic nano-grinding device to combine mechanical shearing and high-frequency vibration to refine the particles to the nanoscale (<100nm); 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 avoid solvent volatilization. The above ultrasonic nano-grinding devices are all prior art; S1.4. Remove impurities from the grinding slurry through chemical precipitation (such as removing copper and lead with sodium sulfide), displacement reaction (replacing heavy metals with zinc powder), or centrifugal filtration; S1.5. Dehydrate the slurry after impurity removal with a filter press or a centrifuge to obtain a wet zinc oxide filter cake, and then prepare dry powder through spray drying or low-temperature vacuum drying (100–120°C) to avoid particle agglomeration; S1.6. Calcinate the dried powder at 400–500°C to optimize the crystal form and remove residual organic matter, and finally obtain a high-purity nano-zinc oxide powder; S2. Mix the zinc oxide powder after wet grinding with auxiliary materials to optimize the resistance performance of the zinc oxide varistor; the auxiliary materials include metal salt solutions such as cobalt and bismuth; mix and stir the auxiliary materials with the zinc oxide powder, and form a composite powder coating the zinc oxide through a precipitation reaction to enhance the non-linear conductivity characteristics of the varistor. Add a dispersant (such as polyvinyl alcohol) to prevent agglomeration and ensure uniform grain boundary distribution after sintering; S3. Perform a shaping process on the mixed powder: 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, control the granulation moisture content at 5-8% to avoid cracking during subsequent tablet pressing; S3.2. Compression molding. Use isostatic pressing technology to press the granulated powder into a round tablet blank. The pressure range is 80-150 Mpa, and the density of the blank needs to reach 60-70% of the theoretical density to ensure that the sintering shrinkage rate is controllable; S4. Perform a sintering process on the formed blank: S4.1. Pre-sintering. Heat at 700-900 °C for 1-3 hours to remove the granulating agent and organic impurities; S4.2. High-temperature sintering. Use gradient heating (10 °C / min) to 1100-1300 °C and hold for 2-5 hours to form a dense structure in which ZnO grains and grain boundary oxides coexist; control the grain size within 10-30 μm and the grain boundary thickness within 0.1-1 μm to ensure the non-linear response accuracy of the varistor; S5. Perform surface treatment and electrode processing on the sintered zinc oxide varistor: S5.1. Grinding and cleaning. Use a four-pass surface grinder to polish both sides of the sintered sheet, control the thickness tolerance within ±0.05 mm, and use ultrasonic cleaning to remove residual particles on the surface to avoid electrode coating defects; S5.2. Electrode preparation. Spray silver paste or aluminum paste as the electrode material and perform secondary sintering at 800-900 °C to form an ohmic contact. The electrode thickness is 10-30 μm, and the edge blank width is ≥1 mm to prevent electric field concentration and breakdown; S6. Verify the performance of the zinc oxide varistor: S6.1. Volt-ampere characteristic test. Detect the leakage current (required <50 μA) under power frequency voltage (such as ~10 kV) to screen qualified products; S6.2. Current-carrying test. Simulate lightning current impact (such as 8 / 20 μs waveform, 40 kA peak value) to verify the energy tolerance ability.

[0068] As used in the specification and claims, certain terms are used 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. The specification and claims do not distinguish components by the difference in names, but by the difference in functions of the components. As used throughout the specification and claims, "comprising" is an open-ended term and should be interpreted as "including but not limited to". "Substantially" means 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 processing device for zinc oxide varistors used in lightning arresters, characterized in that: It includes a processing cylinder and a filtering cylinder. The processing cylinder is arranged above the filtering cylinder. A crushing assembly for crushing zinc oxide raw materials is arranged inside the processing cylinder. A grading and grinding mechanism is arranged below the crushing assembly. The grading and 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 for preventing the accumulation of zinc oxide particles is arranged between the crushing assembly and the first grinding assembly. Filtering mechanisms are symmetrically arranged up and down inside the filtering cylinder. A feeding mechanism is arranged below the filtering mechanism.

2. The processing device for zinc oxide varistor used in 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 fan-shaped ring surface of the first grinding base. A number of first grinding blocks are fixedly arranged in a circle on the lower end surface of the first grinding ring. The gap between the first grinding blocks and the fan-shaped ring surface of the first grinding base is the first grinding space.

3. The processing device for zinc oxide varistor used in 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 number of second grinding blocks are fixedly arranged in a circle on the fan-shaped ring surface of the second grinding disc. The gap between the second grinding blocks and the second grinding surface is the second grinding space. The second grinding space communicates with the first grinding space.

4. The processing device for zinc oxide resistor chips used in lightning arresters according to claim 1, characterized in that: The third grinding assembly includes a hollow connecting shaft, a feeding funnel, a third grinding disc, and a third grinding base arranged in sequence from top to bottom. The feeding funnel is fixedly sleeved on the circumferential surface of the connecting shaft. A number of feeding grooves communicating with the inner cavities of the feeding funnel and the connecting shaft are circumferentially formed on the circumferential surface of the connecting shaft located inside the feeding funnel. The feeding funnel is rotatably arranged on the lower end surface of the second grinding base and communicates with the second grinding space. A number 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 gap between a number of grinding balls and the third grinding base forms the third grinding space.

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

6. The processing device for zinc oxide resistor chips used in lightning arresters according to claim 5, wherein: The crushing assembly includes a gear two, a ring sleeve, and a frustum-shaped support seat. The ring sleeve is arranged inside the gear two and is on the same horizontal plane as the gear two. A number of first crushing cutters are fixedly connected in a circle between the outer circumferential surface of the ring sleeve and the inner circumferential surface of the gear two. The ring sleeve is fixedly sleeved on the circumferential surface of the rotating shaft. A number of inclined second crushing cutters are fixedly arranged in a circle between the fan-shaped ring surface of the support seat and the lower end surface of the gear two. The support seat is fixedly sleeved on the circumferential surface of the rotating shaft.

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

8. The processing device for zinc oxide varistor for arrester according to claim 1, wherein: An annular first support plate is fixedly arranged on the lower end surface of the processing cylinder. A ring-shaped top plate is fixedly installed on the upper end surface of the filter cylinder. A second support cylinder is fixedly arranged on the middle surface of the top plate. The position of the second support cylinder corresponds to the position of the processing cylinder. A flexible connection ring is fixedly connected between the second support cylinder and the processing cylinder.

9. The processing device for zinc oxide resistor chips used in a lightning arrester according to claim 1, characterized in that: The filtering mechanism includes a second annular support plate, a second annular support frame and a second support cylinder. A number of sliding plates are slidably arranged on the upper surface of the second annular support plate in a circumferential manner. L-shaped guide rails fixed to the second annular support plate are symmetrically arranged on both sides of the sliding plates. A fan-shaped filter plate is fixedly arranged at the position of the sliding plate close to the center of the second annular support plate. A circular plate-like structure can be formed after combining a number of filter plates. The second annular support frame is fixedly arranged on the upper end surface of the second annular support plate. A gap is left between the upper inner wall surface of the installed second annular support frame and the filter plate. A slider is installed on the upper end surface of the sliding plate. A rectangular sliding groove is formed at the position of the upper end surface of the second annular support frame corresponding to the slider. The slider is slidably arranged in the sliding groove. A connection hole is formed at the position of the upper end surface of the second annular support frame away from the sliding groove. A number of pushing assemblies for combining the filter plates are arranged on the circumferential surfaces of the first support cylinder and the second support cylinder. A gap is left between the lower end surface of the first support cylinder and the upper end surface of the upper second support cylinder. A gap is also left between the lower end surface of the upper second support cylinder and the upper end surface of the lower second support cylinder. An annular groove is formed on the upper end surface of the second support cylinder. A sealing ring is slidably arranged in the annular groove. A second spring is fixedly connected between the sealing ring and the inner bottom surface of the annular groove.

10. A processing method for a processing device according to any one of claims 1 to 9, characterized in that, It includes the following steps: S1. Adopt a wet grinding process to perform particle refinement treatment on zinc oxide raw materials: First, perform pretreatment on the zinc oxide raw materials, and use a processing device to perform crushing and grinding treatment on the zinc oxide raw materials; then prepare and disperse the pretreated zinc oxide raw materials into a slurry; secondly, perform wet grinding and refinement on the dispersed material; thirdly, perform impurity removal on the refined material and perform purification treatment after impurity removal; then perform solid-liquid separation and drying on the purified material; finally, perform post-treatment calcination on the material to obtain high-purity nano-zinc oxide powder. S2. Mix the zinc oxide powder with auxiliary materials. S3. Perform granulation and compression molding treatment on the mixed powder. S4. Perform pre-sintering and high-temperature sintering treatment on the formed blank. S5. Grind and clean the surface of the sintered sheet-shaped zinc oxide resistor and then perform electrode processing. S6. Perform volt-ampere characteristic testing and current-carrying test on the zinc oxide resistor.

Images