Low-loss porcelain clay grinding and dynamic screening equipment and process for insulator production

Abstract

The low-loss porcelain clay grinding and dynamic screening equipment comprises an equipment body, a grinding assembly and a screening assembly, a grinding cone is driven to rotate through a motor, meanwhile, transmission is conducted to a transmission gear ring through a transmission gear to drive a separation sleeve to rotate, porcelain clay penetrates through a feeding hole and is intermittently fed to the top of a feeding plate, and the screening assembly is driven to rotate; one part of porcelain clay under the action of centrifugal force and gravity penetrates through a screening net to enter the bottom of an inner cavity of a screening cavity, one part of the porcelain clay is screened layer by layer through a feeding plate to enter an area A to be ground, the screened porcelain clay is slowly conveyed to the area to be ground through the rotating feeding plate, and meanwhile airflow is blown into a grinding cavity through a screening assembly and guided through a grinding groove; fine powder in the area A and the screening net is taken out of the screening net, screening of particles after grinding is promoted, meanwhile, china clay caking is reduced, and screening hole blocking is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of insulator preparation equipment, and more specifically, to a low-loss kaolin grinding and dynamic screening equipment and process for insulator production. Background Art

[0002] In the process of insulator production, the grinding and screening of kaolin are important processes that determine key indicators such as the mechanical strength and electrical insulation performance of insulators. However, kaolin has an irregular shape, high hardness and certain toughness, and the following problems are likely to occur during the grinding and screening process: (1) Serious particle agglomeration: Due to the irregular shape and high surface energy of kaolin particles, traditional impact or extrusion grinding methods are likely to cause adhesion between particles to form hard agglomerates, resulting in uneven particle size distribution and directly affecting the dielectric performance of insulators; (2) Low screening efficiency: Irregular particles are likely to block the screen during the screening process, resulting in poor continuity of dynamic screening and frequent shutdowns for cleaning, seriously affecting the continuity of production.

[0003] Patent CN202410841008.4 discloses a stirring mill for ceramic insulator production, which includes a frame. An outer barrel is fixedly connected to the frame, and a plurality of inner barrels are rotatably arranged inside the outer barrel. By rotating and vibrating, the kaolin blocks collide, extrude and rub against each other to grind the kaolin. At the same time, the screen plate is jolted up and down to prevent blockage.

[0004] However, the viscosity of kaolin is relatively large. When the feeding amount is large, the adhesion force between particles is much greater than the mechanical force. After grinding, the particle size of the agglomerates still exceeds the process requirements. To control the caking rate, the feeding amount is reduced, resulting in a decrease in the unit processing energy efficiency; there is no grading treatment structure designed for agglomerates. In view of this, the present invention provides a low-loss kaolin grinding and dynamic screening equipment for insulator production. Through a grading pretreatment mechanism, the load of the main grinding unit is reduced, and combined with a multi-force field collaborative screening structure, the grinding and screening efficiency is improved. Summary of the Invention

[0005] To solve the above technical problems, on the one hand, the present invention provides a low-loss kaolin grinding and dynamic screening equipment for insulator production. In the technical solution of the present invention, it includes a device main body, and the device main body includes a screening chamber. A transmission mechanism is arranged at the top of the inner cavity of the screening chamber; A grinding assembly, including a motor, a driving shaft, grinding columns and grinding cones installed at the top of the screening chamber. The upper and lower ends of the grinding columns are respectively fixedly connected to the driving shaft and the grinding cones. The motor drives the grinding columns and the grinding cones to rotate through the driving shaft; The screening component includes a connecting ring rotatably connected to the top inside the screening cavity. On both sides of the lower end face of the connecting ring, a partition sleeve and a screening mesh are respectively fixedly connected. The lower end of the screening mesh is fixedly connected to a grinding cavity. The partition sleeve is connected by a transmission mechanism. The inner diameter of the partition sleeve is equal to the outer diameter of the grinding column. A feeding plate is spirally arranged on the inner wall of the screening mesh. The outer edge of the feeding plate is fixedly connected to the inner wall of the screening mesh, and the inner edge of the feeding plate is rotatably connected to the outer wall of the grinding column. The kaolin is put through the feeding port onto the upper end face of the feeding plate; The screening component is installed at the lower end of the grinding cavity. An external air pump blows air into the grinding cavity through the screening component to screen the kaolin.

[0006] Further, in the technical solution of the present invention, the grinding cone has the same shape and size as the inner cavity of the grinding cavity, and a plurality of groups of grinding edges are fixedly connected circumferentially on the outer wall of the grinding cone. A plurality of groups of grinding grooves are circumferentially spaced on the inner wall of the grinding cavity.

[0007] Further, in the technical solution of the present invention, a plurality of groups of feeding ports are circumferentially spaced on the top of the connecting ring, and the feeding ports intermittently overlap with the feeding port during rotation.

[0008] Further, in the technical solution of the present invention, an installation groove is opened at the bottom of the inner cavity of the grinding cavity, an air inlet hole is opened at the bottom of the installation groove, the diameter of the air inlet hole gradually increases along the vertically downward direction, and the lower end of the air inlet hole is rotatably connected to the top of the screening component.

[0009] Further, in the technical solution of the present invention, the screening component includes: an air supply plate installed in the installation groove, a connecting nozzle rotatably connected to the bottom, and a connecting component connected to an external air pump; The air supply plate includes a sealing frustum and an elastic ring slidably connected to the inner cavity of the installation groove. The sealing frustum is in an inverted frustum shape, the elastic ring is in a circular ring shape, the inner side of the circular ring of the elastic ring is fixedly connected to the lower edge of the outer wall of the sealing frustum, and the outer edge of the circular ring of the elastic ring is fixedly connected to the top edge of the side wall of the installation groove.

[0010] Further, in the technical solution of the present invention, a plurality of groups of air outlet holes are circumferentially spaced on the upper end face of the elastic ring, and the positions and numbers of the air outlet holes correspond to the grinding grooves one by one.

[0011] Further, in the technical solution of the present invention, a frustum-shaped hole is opened at the top of the connecting nozzle, the inner wall shape of the frustum-shaped hole is adapted to the outer wall shape of the bottom of the grinding cavity, and a sealing gasket is fixedly connected to the inner wall of the frustum-shaped hole.

[0012] Further, in the technical solution of the present invention, the transmission gear ring and the driving gear rotate coaxially, and the speed ratio is 1:20 - 50.

[0013] A low-loss kaolin grinding and dynamic screening process for insulator production. The kaolin is fed through the feed inlet. The motor drives the grinding cone to rotate, and at the same time, it is transmitted to the transmission gear ring through the transmission gear to drive the partition sleeve to rotate. When the discharge port overlaps with the feed hole, the kaolin is intermittently put onto the top of the feeding plate. Part of the kaolin passes through the screening net and enters the bottom of the inner cavity of the screening chamber, and part of it is layer-by-layer screened through the feeding plate and enters the grinding chamber for grinding. The kaolin that has passed through the screening is slowly conveyed by the rotating feeding plate to the grinding chamber for grinding. At the same time, the air flow is blown into the grinding chamber through the screening component. Guided by the grinding groove, the fine powder inside the grinding chamber and inside the screening net is carried out. The kaolin after grinding and screening is collected in the screening chamber and taken out through the discharge port.

[0014] Effective gain: In the technical solution of the present invention, by setting the screening component, the transmission gear ring is connected to the driving gear through the transmission gear, so that the grinding chamber rotates in the opposite direction to the grinding cone. Without a powerful driving device, the corresponding grinding efficiency can be achieved. At the same time, the intermittently opened discharge port enables the intermittent input of kaolin. The input kaolin is screened by the screening net, and the kaolin that meets the particle size is preferentially screened out. Then, it is screened through the sieve holes of the feeding plate and enters the grinding chamber to be ground by the grinding cone. The kaolin that has not passed through the screening of the feeding plate is slowly conveyed by the rotating feeding plate to the grinding chamber for grinding. By controlling the speed ratio of the feeding plate and the grinding cone, while maintaining continuous grinding, the grinding amount is controlled, the grinding efficiency of kaolin is improved, and caking caused by over-grinding is avoided. Moreover, air flow is blown into the air inlet hole through the connecting nozzle. The air flow pushes the sealing frustum to slide upward along the inner wall of the installation groove, unfolds the elastic ring, and the air flow passes through the air outlet hole and is guided by the grinding groove. When the air flow speed reaches a certain level, the kaolin powder attached to the inner wall of the grinding chamber and the fine particles attached to the sieve holes of the screening net will flow with the air flow. At the same time, it is avoided that ultra-fine particles block the sieve net during the screening process or cause losses in subsequent processing, and powder caking is avoided, thereby increasing the single operation time of the equipment and reducing the frequency of shutdown for repair.

[0015] Other features and advantages of the present invention will be described in the subsequent specification. Brief Description of the Drawings

[0016] In order to more clearly illustrate the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the low-loss kaolin grinding and dynamic screening equipment for insulator production of the present invention; Figure 2 It is a partial sectional structural diagram of the equipment of the present invention; Figure 3 Schematic cross-sectional structure diagram of the main body part of the device of the present invention; Figure 4 Schematic structure diagram of the grinding assembly of the present invention; Figure 5 Schematic structure diagram of the screening assembly of the present invention; Figure 6 Of the present invention Figure 5 Enlarged structure diagram at position A; Figure 7 Schematic structure diagram of the screening component of the present invention; Figure 8 Schematic structure diagram of the air supply plate of the present invention; Figure 9 Of the present invention Figure 8 Enlarged structure diagram at position B.

[0018] In the figure: 1 device main body, 11 screening chambers, 12 transmission gears, 13 drive gears, 14 annular grooves, 15 air inlet nozzles, 2 grinding assemblies, 21 motors, 22 drive shafts, 23 grinding cones, 24 grinding edges, 25 grinding columns, 3 screening assemblies, 31 grinding chambers, 32 screening nets, 33 connecting rings, 34 separating sleeves, 35 transmission tooth rings, 36 discharge ports, 37 feeding plates, 38 grinding grooves, 39 mounting grooves, 310 air inlet holes, 4 screening components, 41 air supply plates, 411 elastic rings, 412 sealing frustums, 413 air outlet holes, 42 air supply pipes, 43 transition pipes, 44 connecting nozzles. Specific embodiments

[0019] To make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] One aspect of the embodiments of the present invention provides a low-loss kaolin grinding and dynamic screening device for insulator production, including a device main body 1, a grinding assembly 2, a screening assembly 3, and a screening component 4.

[0021] Please refer to Figures 1 to 3 , the device main body 1 includes a screening chamber 11. A transmission assembly is provided at the top of the inner cavity of the screening chamber 11. The transmission assembly includes a drive gear 13 and a transmission gear 12 rotatably connected to the top of the inner cavity of the screening chamber 11, and the transmission gear 12 meshes with the drive gear 13. An annular groove 14 is further opened at the top of the inner cavity of the screening chamber 11. A feed hole communicating with the outside is opened at the top of the annular groove 14. An air inlet nozzle 15 is fixedly connected to the outer wall of the screening chamber 11; The grinding assembly 2 is installed at the top of the screening chamber 11, and the lower end of the grinding assembly 2 extends into the inner cavity of the screening chamber 11 for kaolin grinding. The screening assembly 3 is rotatably connected inside the screening chamber 11, and the screening component 4 is arranged at the bottom of the screening assembly 3 to support the screening assembly 3. The external air pump blows air into the screening component 4 through the air inlet nozzle 15. The air flow enters the inside of the screening assembly 3, passes through the screening assembly 3 to clean the screening assembly 3, reduce blockage. At the same time, the screening assembly 3 rotates in the opposite direction to the grinding assembly 2. The kaolin enters the adjacent area of the grinding assembly 2 and the screening assembly 3 through the feed hole, and is ground and screened by the rotating grinding assembly 2 and screening assembly 3.

[0022] It should be noted that the grinding assembly 2 and the screening assembly 3 rotate coaxially and in opposite directions, and the rotation speed ratio of the screening assembly 3 to the grinding assembly 2 is 1:20 - 50.

[0023] Please refer to Figure 4 , the grinding assembly 2 includes a motor 21 installed at the top of the screening chamber 11. The driving end of the motor 21 penetrates through the screening chamber 11 and extends into the inside of the screening chamber 11 and is fixedly connected with a driving shaft 22. The lower end of the driving shaft 22 is fixedly connected with a grinding column 25. The lower end of the grinding column 25 is fixedly connected with a grinding cone 23. A plurality of groups of grinding edges 24 are fixedly connected at intervals in the circumferential direction of the outer wall of the grinding cone 23.

[0024] Specifically, the motor 21 drives the driving shaft 22 to rotate, and the grinding cone 23 grinds the kaolin. The plurality of groups of grinding edges 24 provided improve the grinding efficiency of the kaolin.

[0025] It should be added that a discharge port is provided at the lower end of the outer wall of the screening chamber 11.

[0026] Please refer to Figures 5 to 6 , the screening assembly 3 includes a connecting ring 33 rotatably connected in the annular groove 14. A plurality of groups of blanking ports 36 are circumferentially spaced apart at the top of the connecting ring 33. Two sides of the bottom of the connecting ring 33 are respectively fixedly connected with a partition sleeve 34 and a screening mesh 32. The inner diameter of the partition sleeve 34 is equal to the outer diameter of the grinding column 25, and the bottom height of the partition sleeve 34 is lower than the top edge height of the grinding column 25. A transmission gear ring 35 is provided at the upper end of the inner side of the partition sleeve 34. The transmission gear ring 35 meshes with the transmission gear 12. The transmission gear ring 35 and the driving gear 13 rotate coaxially, and the rotation speed ratio is 1:20 - 50. The lower end of the screening mesh 32 is fixedly connected with a grinding cavity 31. The inner cavity shape of the grinding cavity 31 is the same as the shape of the grinding cone 23, and the inner cavity size of the grinding cavity 31 is adapted to the outer size of the grinding cone 23.

[0027] Specifically, a feeding plate 37 is spirally arranged inside the screening mesh 32. The outer edge of the feeding plate 37 is fixedly connected to the inner wall of the screening mesh 32, and the inner edge of the feeding plate 37 is rotatably connected to the outer wall of the grinding column 25. The upper end of the feeding plate 37 is provided with screening holes, and along the vertical direction downward, the diameters of the screening holes gradually decrease layer by layer. The diameter of the screening holes of the feeding plate 37 is larger than the diameter of the screening holes of the screening mesh 32.

[0028] It can be understood that the kaolin is put in through the feeding hole. As the connecting ring 33 rotates, the kaolin intermittently passes through the blanking port 36 and enters the inside of the screening mesh 32, realizing intermittent feeding. The kaolin that meets the screening requirements passes through the screening mesh 32 under the action of gravity and centrifugal force and enters the bottom of the inner cavity of the screening chamber 11. The remaining kaolin is gradually screened through the feeding plate 37 and falls into the adjacent area A between the grinding cone 23 and the grinding chamber 31, and is ground by the rotating grinding cone 23 and the grinding chamber 31. The kaolin that does not pass through the screening holes is slowly conveyed to point A by the rotating feeding plate 37 for grinding. By controlling the conveying speed of the feeding plate 37, while maintaining continuous grinding, the amount of grinding per time is controlled, thereby improving the grinding efficiency of the kaolin and avoiding caking caused by over-grinding.

[0029] Furthermore, a plurality of groups of grinding grooves 38 are circumferentially spaced on the inner wall of the grinding chamber 31. An installation groove 39 is opened at the bottom of the inner cavity of the grinding chamber 31, and an air inlet hole 310 is opened at the bottom of the installation groove 39.

[0030] It should be added that the width of the grinding groove 38 gradually increases upward along the inner wall of the grinding chamber 31.

[0031] Please refer to Figures 7 to 9 , the screening assembly 4 includes an air supply plate 41 fixedly connected inside the installation groove 39, a connecting nozzle 44 rotatably connected to the bottom of the grinding chamber 31, and a connecting assembly. The connecting assembly includes an air supply pipe 42 communicated with the air inlet nozzle 15 and a transition pipe 43 connecting the air supply pipe 42 and the connecting nozzle 44. One end of the transition pipe 43 is fixedly connected to the connecting nozzle 44, and the other end of the transition pipe 43 penetrates through the bottom of the screening chamber 11 and is fixedly connected to the screening chamber 11.

[0032] Furthermore, a frustum-shaped hole is opened at the top of the connecting nozzle 44. The shape of the inner wall of the frustum-shaped hole is adapted to the shape of the outer wall of the bottom of the grinding chamber 31, and a sealing gasket is fixedly connected to the inner wall of the frustum-shaped hole.

[0033] Even further, the air supply plate 41 includes a sealing frustum 412 slidably connected to the inner wall of the installation groove 39. The sealing frustum 412 is in an inverted frustum shape. An elastic ring 411 is fixedly connected to the bottom edge of the sealing frustum 412. The elastic ring 411 is in a circular ring shape. The inner side of the elastic ring 411 is fixedly connected to the outer wall of the sealing frustum 412, and the outer edge of the elastic ring 411 is fixedly connected to the top end of the inner wall of the installation groove 39. A plurality of groups of air outlet holes 413 are spaced on the upper end surface of the elastic ring 411. The positions and numbers of the air outlet holes 413 correspond to the grinding grooves 38 one by one.

[0034] It is understandable that the air pump blows out air and is transported to the connecting nozzle 44 through the air delivery pipe 42 and the transition pipe 43. The airflow passes through the air inlet 310 and enters the installation groove 39 and pushes the sealing cone 412 to slide upward along the inner wall of the installation groove 39. The sliding sealing cone 412 unfolds the elastic ring 411, and the airflow passes through the air outlet 413 and is guided to flow inside the screening net 32 ​​through the grinding groove 38. The flowing airflow blows out the ground particles in area A and drives the particles through the sieve holes of the screening net 32, accelerating the screening of the ground porcelain clay and avoiding clogging of the sieve holes. The inner cavity shape of the installation groove 39 is the same as that of the sealing cone 412. When the sealing cone 412 moves upward, the resulting cone shape can reduce the number of particles passing through the air outlet 413 and entering the connecting nozzle 44.

[0035] It should be added that the elastic ring 411 is made of elastic wear-resistant material, such as wear-resistant rubber, silicone rubber and TPE.

[0036] It should be noted that the annular width of the elastic ring 411 is much smaller than the diameter of the sealing cone 412. When there is no air blowing, the top of the sealing cone 412 is flush with the upper edge of the mounting groove 39, and the elastic ring 411 is stored in the adjacent area of ​​the sealing cone 412 and the mounting groove 39. When there is air blowing, the sealing cone 412 is pushed by the wind to slide a small height along the inner wall of the mounting groove 39, and the sealing cone 412 is unfolded, and the air flow passes through the air outlet 413 into the screening net 32. Since the displacement height of the sealing cone 412 is very small, the influence on the stress state of the material grinding in the grinding chamber 31 is negligible.

[0037] It should also be noted that the air supply pipe 42 is fixedly connected to the side wall of the transition pipe 43, and the end of the transition pipe 43 facing away from the connecting nozzle 44 extends out of the screening chamber 11 and is closed by a sealing cover. At the moment when the air pump is started or shut down, and when the air flow rate is low during adjustment, trace particles will pass through the air outlet 413 and enter the interior of the mounting groove 39. The entering particles are collected to the bottom through the transition pipe 43, and the sealing cover is opened to clean the particles.

[0038] Furthermore, the bottom of the installation groove 39 may be configured to be a cone with a high edge and a low interior, so that the incoming particles are collected along the bottom of the installation groove 39 through the air inlet 310 into the transition pipe 43 .

[0039] A low-loss kaolin grinding and dynamic screening process for insulator production. Using the above-mentioned grinding and dynamic screening equipment, kaolin is fed through the feed inlet. The motor drives the grinding cone to rotate, and at the same time, it is transmitted to the transmission gear ring through the transmission gear to drive the partition sleeve to rotate. When the discharge port overlaps with the feed hole, the kaolin is intermittently placed on the top of the feed plate. Part of the kaolin passes through the screening mesh and enters the bottom of the inner cavity of the screening chamber, and part of it is layer-by-layer screened through the feed plate and enters the grinding chamber for grinding. The kaolin that has passed through the screening is slowly transported to the grinding chamber by the rotating feed plate for grinding. At the same time, air flow is blown into the grinding chamber through the screening component, and after being guided by the grinding groove, the fine powder inside the grinding chamber and inside the screening mesh is carried out. The kaolin after grinding and screening is collected in the screening chamber and taken out through the discharge port.

[0040] Principle: The motor 21 drives the grinding cone 23 to rotate, and at the same time, it is transmitted to the transmission gear ring 35 through the transmission gear 12 to drive the partition sleeve 34 to rotate. The kaolin passes through the feed hole. When the discharge port 36 intermittently overlaps with the feed hole, the kaolin is intermittently placed on the top of the feed plate 37. Part of the kaolin under the action of centrifugal force and gravity passes through the screening mesh 32 and enters the bottom of the inner cavity of the screening chamber 11, and part of it is layer-by-layer screened through the feed plate 37 and enters area A for grinding. The kaolin that has passed through the screening is slowly transported to area A for grinding by the rotating feed plate 37. At the same time, air flow is blown into the grinding chamber 31 through the screening component 4, and after being guided by the grinding groove 38, the fine powder inside area A and inside the screening mesh 32 is carried out of the screening mesh 32, promoting the screening of the particles after grinding, reducing the agglomeration of kaolin at the same time, and avoiding the blockage of the screening holes.

[0041] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-loss kaolin grinding and dynamic screening device for insulator production, characterized in that Comprising: A device main body (1), the device main body (1) includes a screening chamber (11), and a transmission mechanism is provided at the top of the inner cavity of the screening chamber (11); A grinding assembly (2), including a motor (21), a drive shaft (22), a grinding column (25) and a grinding cone (23) installed at the top of the screening chamber (11), the upper and lower ends of the grinding column (25) are respectively fixedly connected to the drive shaft (22) and the grinding cone (23), and the motor (21) drives the grinding column (25) and the grinding cone (23) to rotate through the drive shaft (22); A screening assembly (3), including a connecting ring (33) rotatably connected to the top of the inner cavity of the screening chamber (11), two sides of the lower end face of the connecting ring (33) are respectively fixedly connected with a partition sleeve (34) and a screening mesh (32), the lower end of the screening mesh (32) is fixedly connected with a grinding chamber (31), the partition sleeve (34) is in transmission connection with the (22) through a transmission mechanism, the inner diameter of the partition sleeve (34) is equal to the outer diameter of the grinding column (25), a feeding plate (37) is spirally arranged on the inner wall of the screening mesh (32), the outer edge of the feeding plate (37) is fixedly connected to the inner wall of the screening mesh (32), and the inner edge of the feeding plate (37) is rotatably connected to the outer wall of the grinding column (25), and kaolin is fed through the feeding port onto the upper end face of the feeding plate (37); A screening component (4), installed at the lower end of the grinding chamber (31), and an external air pump blows air into the inner cavity of the grinding chamber (31) through the screening component (4) to screen the kaolin.

2. The low-loss kaolin grinding and dynamic screening equipment for insulator production according to claim 1, wherein, The grinding cone (23) has the same shape and size as the inner cavity of the grinding chamber (31), and a plurality of groups of grinding edges (24) are fixedly connected to the outer wall of the grinding cone (23) in the circumferential direction, and a plurality of groups of grinding grooves (38) are spaced apart in the circumferential direction on the inner wall of the grinding chamber (31).

3. The low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to claim 2, wherein, A plurality of groups of blanking ports (36) are spaced apart at the top of the connecting ring (33), and the blanking ports (36) intermittently overlap with the feeding port during rotation.

4. The low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to claim 3, wherein, An installation groove (39) is provided at the bottom of the inner cavity of the grinding chamber (31), an air inlet hole (310) is provided at the bottom of the installation groove (39), the diameter of the air inlet hole (310) gradually increases along the vertically downward direction, and the lower end of the air inlet hole (310) is rotatably connected to the top of the screening component (4).

5. The low-loss kaolin grinding and dynamic screening equipment for insulator production according to claim 4, characterized in that, The screening component (4) includes: an air supply plate (41) installed in the installation groove (39), a connecting nozzle (44) rotatably connected to the bottom of the (31), and a connecting component connected to an external air pump; The air supply plate (41) includes a sealing frustum (412) slidably connected to the inner cavity of the installation groove (39) and an elastic ring (411), the sealing frustum (412) is in an inverted frustum shape, the elastic ring (411) is in a circular ring shape, the inner side of the circular ring of the elastic ring (411) is fixedly connected to the lower edge of the outer wall of the sealing frustum (412), and the outer edge of the circular ring of the elastic ring (411) is fixedly connected to the top edge of the side wall of the installation groove (39).

6. The low-loss porcelain clay grinding and dynamic screening equipment for insulator production according to claim 5, characterized in that, The upper end surface of the elastic ring (411) is provided with several groups of air outlet holes (413) at intervals, and the positions and numbers of the air outlet holes (413) correspond to the grinding grooves (38) one by one.

7. The low-loss kaolin grinding and dynamic screening equipment for insulator production according to claim 5, characterized in that, The top of the connecting nozzle (44) is provided with a frustum-shaped hole, the inner wall shape of the frustum-shaped hole is adapted to the outer wall shape of the bottom of the grinding cavity (31), and a sealing gasket is fixedly connected to the inner wall of the frustum-shaped hole.

8. A low-loss porcelain clay grinding and dynamic screening process for insulator production, characterized in that, Using the grinding and dynamic screening device according to any one of claims 1-7, the kaolin is put in through the feed inlet, the motor drives the grinding cone to rotate, and at the same time, it is transmitted to the transmission gear ring through the transmission gear to drive the partition sleeve to rotate. When the discharge port overlaps with the feed hole, the kaolin is intermittently put on the top of the feeding plate. Part of the kaolin passes through the screening mesh and enters the bottom of the inner cavity of the screening chamber, and part of it is layer-by-layer screened through the feeding plate and enters the grinding chamber for grinding. The screened kaolin is slowly conveyed to the grinding chamber by the rotating feeding plate for grinding. At the same time, the air flow is blown into the grinding chamber through the screening component, and after being guided by the grinding groove, the fine powder inside the grinding chamber and inside the screening mesh is taken out. The kaolin after grinding and screening is collected in the screening chamber and taken out through the discharge port.

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